Journal of Applied Poultry Research最新文献_第7页

Screening of lactic acid bacteria from Hotan black chicken and comprehensive evaluation of the potential probiotic Pediococcus pentosaceus HBC 和田乌鸡乳酸菌的筛选及潜在益生菌戊sacpetococcus HBC的综合评价

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-25 DOI: 10.1016/j.japr.2025.100609

R. Gao , Z. Chen , J. He , X. Feng , C. Shi , M. Tuniyazi , H. Wang , A. Reheman , M. Qi

To identify novel probiotics from indigenous avian sources, we isolated seven lactic acid bacterial (LAB) strains from the intestinal tracts of the Hotan black chicken, a native breed from Xinjiang, China. A preliminary safety screening based on hemolytic activity resulted in the exclusion of four isolates. The remaining three non-hemolytic strains were subsequently subjected to a systematic evaluation for key probiotic atributes, including tolerance to acid and bile salts, auto-aggregation, surface hydrophobicity, cell adhesion, and antimicrobial activity. Among these, Pediococcus pentosaceus HBC demonstrated the most promising probiotic profile and was selected for in-depth phenotypic and genomic characterization. Phenotypically, Pediococcus pentosaceus HBC exhibited exceptional resilience, with high survival rates under acidic (48% at pH 2.0) and bile salt (70% at 0.3%) conditions. It also displayed strong surface properties, including significant hydrophobicity (>49%), auto-aggregation capacity (>34%), and epithelial cell adhesion (>84%). Furthermore, the strain showed broad-spectrum antimicrobial activity against major poultry pathogens such as Salmonella and E. coli. Genomic analysis corroborated these findings, revealing a versatile genetic repertoire for carbohydrate metabolism, stress adaptation, and antimicrobial functions. Crucially, the analysis affirmed its safety profile by indicating a low risk of virulence and antibiotic resistance gene transfer. These comprehensive characteristics strongly support the potential of Pediococcus pentosaceus HBC as a safe and efficacious probiotic candidate for enhancing gut health and disease resistance in poultry production.

为了从地方禽源中鉴定新的益生菌，我们从新疆和田黑鸡肠道中分离出7株乳酸菌（LAB）。基于溶血活性的初步安全性筛选结果排除了四个分离株。随后，对其余三种非溶血菌株进行了关键益生菌特性的系统评估，包括对酸和胆盐的耐受性、自聚集性、表面疏水性、细胞粘附性和抗菌活性。其中，戊糖Pediococcus pentosaceus HBC表现出最有希望的益生菌特征，并被选中进行深入的表型和基因组表征。从表型上看，戊糖球球菌（Pediococcus pentosaceus）的HBC表现出非凡的恢复能力，在酸性（pH 2.0时为48%）和胆盐（pH 0.3%时为70%）条件下具有很高的存活率。它还显示出很强的表面特性，包括显著的疏水性（>49%）、自聚集能力（>34%）和上皮细胞粘附性（>84%）。此外，该菌株对沙门氏菌和大肠杆菌等主要家禽病原体具有广谱抗菌活性。基因组分析证实了这些发现，揭示了碳水化合物代谢、应激适应和抗菌功能的多种遗传库。至关重要的是，该分析通过表明其毒性和抗生素抗性基因转移的低风险确认了其安全性。这些综合特征有力地支持了戊糖球球菌HBC作为一种安全有效的候选益生菌的潜力，可以增强家禽生产中的肠道健康和疾病抵抗力。

{"title":"Screening of lactic acid bacteria from Hotan black chicken and comprehensive evaluation of the potential probiotic Pediococcus pentosaceus HBC","authors":"R. Gao , Z. Chen , J. He , X. Feng , C. Shi , M. Tuniyazi , H. Wang , A. Reheman , M. Qi","doi":"10.1016/j.japr.2025.100609","DOIUrl":"10.1016/j.japr.2025.100609","url":null,"abstract":"<div><div>To identify novel probiotics from indigenous avian sources, we isolated seven lactic acid bacterial (LAB) strains from the intestinal tracts of the Hotan black chicken, a native breed from Xinjiang, China. A preliminary safety screening based on hemolytic activity resulted in the exclusion of four isolates. The remaining three non-hemolytic strains were subsequently subjected to a systematic evaluation for key probiotic atributes, including tolerance to acid and bile salts, auto-aggregation, surface hydrophobicity, cell adhesion, and antimicrobial activity. Among these, <em>Pediococcus pentosaceus</em> HBC demonstrated the most promising probiotic profile and was selected for in-depth phenotypic and genomic characterization. Phenotypically, <em>Pediococcus pentosaceus</em> HBC exhibited exceptional resilience, with high survival rates under acidic (48% at pH 2.0) and bile salt (70% at 0.3%) conditions. It also displayed strong surface properties, including significant hydrophobicity (>49%), auto-aggregation capacity (>34%), and epithelial cell adhesion (>84%). Furthermore, the strain showed broad-spectrum antimicrobial activity against major poultry pathogens such as <em>Salmonella</em> and <em>E. coli</em>. Genomic analysis corroborated these findings, revealing a versatile genetic repertoire for carbohydrate metabolism, stress adaptation, and antimicrobial functions. Crucially, the analysis affirmed its safety profile by indicating a low risk of virulence and antibiotic resistance gene transfer. These comprehensive characteristics strongly support the potential of <em>Pediococcus pentosaceus</em> HBC as a safe and efficacious probiotic candidate for enhancing gut health and disease resistance in poultry production.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100609"},"PeriodicalIF":2.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145320250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancements in machine learning applications in poultry farming: a literature review 机器学习在家禽养殖中的应用进展：文献综述

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-16 DOI: 10.1016/j.japr.2025.100602

M. Naeem, Z. Jia, J. Wang, S. Poudel, S. Manjankattil, Y. Adhikari, M. Bailey, D. Bourassa

Integrating machine learning (ML) in poultry science presents transformative opportunities for optimizing production, enhancing animal welfare, and improving disease management. This review explores the current landscape of ML applications within the poultry sector, encompassing growth prediction, disease detection, behaviour analysis, environmental monitoring, and productivity enhancement. ML techniques, including artificial neural networks, random forests, and deep learning, have demonstrated high predictive accuracy and adaptability in handling complex and nonlinear poultry data. Key innovations include the automated detection of diseased birds via image and audio recognition, the prediction of growth and body weight using environmental and nutritional parameters, and the assessment of animal behavior and welfare. This review also highlights challenges related to data quality, model interpretability, infrastructure limitations, and the generalizability of models across different poultry systems. Despite these hurdles, case studies reported in the literature demonstrate tangible benefits in productivity gains and early disease mitigation through ML applications. Moreover, the emergence of real-time sensing technologies and Internet of Things devices enables more granular data collection, further enhancing ML’s potential impact. Future strategies include fostering closer collaboration between data scientists and poultry specialists, developing explainable machine learning models, and integrating these models into decision-support systems to better assist farmers. The article advocates for scalable, ethical, and transparent ML solutions that align with both commercial viability and animal welfare goals. Overall, ML serves as a promising frontier for addressing the complex biological and operational dynamics of modern poultry farming.

将机器学习（ML）整合到家禽科学中，为优化生产、提高动物福利和改善疾病管理提供了变革性的机会。这篇综述探讨了ML在家禽业中的应用现状，包括生长预测、疾病检测、行为分析、环境监测和生产力提高。机器学习技术，包括人工神经网络、随机森林和深度学习，在处理复杂和非线性家禽数据方面表现出很高的预测准确性和适应性。关键的创新包括通过图像和音频识别自动检测病禽，使用环境和营养参数预测生长和体重，以及评估动物行为和福利。本综述还强调了与数据质量、模型可解释性、基础设施限制以及模型在不同家禽系统中的普遍性相关的挑战。尽管存在这些障碍，但文献中报道的案例研究表明，通过ML应用在提高生产力和早期疾病缓解方面有切实的好处。此外，实时传感技术和物联网设备的出现使更精细的数据收集成为可能，进一步增强了机器学习的潜在影响。未来的战略包括促进数据科学家和家禽专家之间更密切的合作，开发可解释的机器学习模型，并将这些模型集成到决策支持系统中，以更好地帮助农民。本文倡导可扩展、道德和透明的ML解决方案，这些解决方案既符合商业可行性，又符合动物福利目标。总的来说，机器学习是解决现代家禽养殖复杂的生物和操作动态的一个有前途的前沿。

{"title":"Advancements in machine learning applications in poultry farming: a literature review","authors":"M. Naeem, Z. Jia, J. Wang, S. Poudel, S. Manjankattil, Y. Adhikari, M. Bailey, D. Bourassa","doi":"10.1016/j.japr.2025.100602","DOIUrl":"10.1016/j.japr.2025.100602","url":null,"abstract":"<div><div>Integrating machine learning (ML) in poultry science presents transformative opportunities for optimizing production, enhancing animal welfare, and improving disease management. This review explores the current landscape of ML applications within the poultry sector, encompassing growth prediction, disease detection, behaviour analysis, environmental monitoring, and productivity enhancement. ML techniques, including artificial neural networks, random forests, and deep learning, have demonstrated high predictive accuracy and adaptability in handling complex and nonlinear poultry data. Key innovations include the automated detection of diseased birds via image and audio recognition, the prediction of growth and body weight using environmental and nutritional parameters, and the assessment of animal behavior and welfare. This review also highlights challenges related to data quality, model interpretability, infrastructure limitations, and the generalizability of models across different poultry systems. Despite these hurdles, case studies reported in the literature demonstrate tangible benefits in productivity gains and early disease mitigation through ML applications. Moreover, the emergence of real-time sensing technologies and Internet of Things devices enables more granular data collection, further enhancing ML’s potential impact. Future strategies include fostering closer collaboration between data scientists and poultry specialists, developing explainable machine learning models, and integrating these models into decision-support systems to better assist farmers. The article advocates for scalable, ethical, and transparent ML solutions that align with both commercial viability and animal welfare goals. Overall, ML serves as a promising frontier for addressing the complex biological and operational dynamics of modern poultry farming.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100602"},"PeriodicalIF":2.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of location tracking to link egg production with toe pecking injuries, feather quality, body mass in laying hens 使用位置跟踪将蛋鸡的产蛋量与脚趾啄伤、羽毛质量和体重联系起来

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-16 DOI: 10.1016/j.japr.2025.100603

M.J. Toscano , M. Neuditschko , S.G. Gebhardt-Henrich

The current study sought to validate a proxy for egg laying that could be used within cage-free housing systems towards breeding programs of laying hens. Once validated, the proxy was then assessed against several common health and welfare traits (plumage, toe injuries, and body mass) to determine whether a relationship existed. We also estimated the heritabilities of the health traits and performed genome wide association studies to identify potential candidate gene, aiming to determine whether these phenotypes could be utilized in future breeding programs. Our effort used unique parental crosses with known pedigrees that allowed data within the cage free housing system to be compared with parallel family groups maintained in cages at the facility of our industrial partner. Findings indicated that the proxy of egg production was highly correlated with the production records of birds in cages. We also found that plumage in the cage-free housing system was positively related to the egg production proxy, whereas toe injuries were negatively related. We believe the findings support the position that phenotyping within cage-free housing systems can be a valuable component in efforts to breed hens that perform well in these systems.

目前的研究试图验证一种可以在无笼饲养系统中用于蛋鸡繁殖计划的产蛋代理。一旦验证，然后根据几个常见的健康和福利特征（羽毛，脚趾损伤和体重）对代理进行评估，以确定是否存在关系。我们还估计了健康性状的遗传力，并进行了全基因组关联研究，以确定潜在的候选基因，旨在确定这些表型是否可以在未来的育种计划中使用。我们的工作使用了具有已知系谱的独特亲代杂交，从而可以将无笼饲养系统内的数据与我们的工业合作伙伴设施中笼子中维持的平行家庭群体进行比较。结果表明，产蛋量的代用指标与笼养鸟类的产蛋量记录高度相关。我们还发现，在无笼饲养系统中，羽毛与产蛋代理呈正相关，而脚趾损伤呈负相关。我们相信这些发现支持了这样一种观点，即在无笼饲养系统中进行表型分析可以成为在这些系统中繁殖母鸡的一个有价值的组成部分。

{"title":"Use of location tracking to link egg production with toe pecking injuries, feather quality, body mass in laying hens","authors":"M.J. Toscano , M. Neuditschko , S.G. Gebhardt-Henrich","doi":"10.1016/j.japr.2025.100603","DOIUrl":"10.1016/j.japr.2025.100603","url":null,"abstract":"<div><div>The current study sought to validate a proxy for egg laying that could be used within cage-free housing systems towards breeding programs of laying hens. Once validated, the proxy was then assessed against several common health and welfare traits (plumage, toe injuries, and body mass) to determine whether a relationship existed. We also estimated the heritabilities of the health traits and performed genome wide association studies to identify potential candidate gene, aiming to determine whether these phenotypes could be utilized in future breeding programs. Our effort used unique parental crosses with known pedigrees that allowed data within the cage free housing system to be compared with parallel family groups maintained in cages at the facility of our industrial partner. Findings indicated that the proxy of egg production was highly correlated with the production records of birds in cages. We also found that plumage in the cage-free housing system was positively related to the egg production proxy, whereas toe injuries were negatively related. We believe the findings support the position that phenotyping within cage-free housing systems can be a valuable component in efforts to breed hens that perform well in these systems.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100603"},"PeriodicalIF":2.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applied research note: Impact of tapioca flour as a substitute for salt and sodium tripolyphosphate on cooking loss and sensory traits in chicken breast patties 应用研究说明：木薯粉替代盐和三聚磷酸钠对鸡胸肉饼蒸煮损失和感官性状的影响

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-16 DOI: 10.1016/j.japr.2025.100604

Janghan Choi, Debolina Chatterjee, Majid Shakeri, Byungwhi Kong, Hong Zhuang, Brian Bowker

Diverse ingredients including salt and phosphate are frequently added to ground chicken meat. Salt (sodium chloride) and sodium tripolyphosphate (STPP) are traditionally used for their roles in flavor enhancement, water retention, and texture improvement. However, high concentrations of these additives raise health concerns due to their sodium content. This study is the first to systematically evaluate the physicochemical and sensory effects of fully or partially replacing high concentrations of salt (0.75 %) and sodium tripolyphosphate (0.45 %) with 2 % tapioca flour in chicken breast patties through a two-part experimental design. In Study 1, the addition of TF alone with low salt (0.38 %) was compared to the inclusion of high salt in chicken patties. In Study 2, the addition of TF in contrast to the addition of STPP alone or with 0.75 % salt in chicken patties was evaluated. The TF alone or with 0.38 % salt or addition of 0.75 % salt alone reduced cooking loss compared to ingredient-free chicken patties. The inclusion of TF alone or with 0.38 % salt decreased cohesiveness and hardness in chicken patties compared to ingredient-free patties and patties with TF and 0.75 % salt. The addition of TF showed similar effects in reducing cooking loss as the addition of 0.75 % salt with 0.45 % STPP. The addition of TF reduced hardness and springiness compared to the inclusion of 0.45 % STPP. Although the addition of STPP increased grittiness, the addition of TF did not affect grittiness. In conclusion, from the perspectives of cooking loss and sensory traits, TF alone or with 0.38 % salt can replace 0.75 % salt, and TF alone can also substitute for 0.45 % STPP, either alone or combined with 0.75 % salt, in chicken breast patties. The current study demonstrates that 2 % TF could be a good alternative in replacing 0.75 % salt and/or 0.45 % STPP for ground chicken breast products in marketplaces.

包括盐和磷酸盐在内的各种成分经常被添加到碎鸡肉中。盐（氯化钠）和三聚磷酸钠（STPP）传统上用于增强风味，保水和改善质地。然而，高浓度的这些添加剂由于其钠含量而引起健康问题。本研究首次通过两部分实验设计，系统地评估了用2%木薯粉完全或部分替代鸡胸肉饼中的高浓度盐（0.75%）和三聚磷酸钠（0.45%）的理化和感官效应。在研究1中，将鸡肉饼中单独添加低盐（0.38%）的TF与添加高盐的TF进行比较。在研究2中，比较了鸡肉饼中添加TF与单独添加STPP或添加0.75%盐的效果。与无配料鸡肉馅饼相比，单独添加TF或添加0.38%的盐或单独添加0.75%的盐可减少烹饪损失。与无配料肉饼和含0.75%盐的肉饼相比，单独添加TF或添加0.38%盐降低了肉饼的黏结性和硬度。添加TF与添加0.75%的盐和0.45%的STPP在减少蒸煮损失方面效果相似。与添加0.45%的STPP相比，添加TF降低了硬度和弹性。虽然STPP的加入增加了砂性，但TF的加入对砂性没有影响。综上所述，从蒸煮损失和感官性状的角度来看，鸡胸肉饼中单独使用TF或添加0.38%盐均可替代0.75%盐，单独使用TF或与0.75%盐联合使用TF均可替代0.45% STPP。目前的研究表明，在市场上，2%的TF可以很好地替代0.75%的盐和/或0.45%的STPP用于碎鸡胸肉产品。

{"title":"Applied research note: Impact of tapioca flour as a substitute for salt and sodium tripolyphosphate on cooking loss and sensory traits in chicken breast patties","authors":"Janghan Choi, Debolina Chatterjee, Majid Shakeri, Byungwhi Kong, Hong Zhuang, Brian Bowker","doi":"10.1016/j.japr.2025.100604","DOIUrl":"10.1016/j.japr.2025.100604","url":null,"abstract":"<div><div>Diverse ingredients including salt and phosphate are frequently added to ground chicken meat. Salt (sodium chloride) and sodium tripolyphosphate (STPP) are traditionally used for their roles in flavor enhancement, water retention, and texture improvement. However, high concentrations of these additives raise health concerns due to their sodium content. This study is the first to systematically evaluate the physicochemical and sensory effects of fully or partially replacing high concentrations of salt (0.75 %) and sodium tripolyphosphate (0.45 %) with 2 % tapioca flour in chicken breast patties through a two-part experimental design. In Study 1, the addition of TF alone with low salt (0.38 %) was compared to the inclusion of high salt in chicken patties. In Study 2, the addition of TF in contrast to the addition of STPP alone or with 0.75 % salt in chicken patties was evaluated. The TF alone or with 0.38 % salt or addition of 0.75 % salt alone reduced cooking loss compared to ingredient-free chicken patties. The inclusion of TF alone or with 0.38 % salt decreased cohesiveness and hardness in chicken patties compared to ingredient-free patties and patties with TF and 0.75 % salt. The addition of TF showed similar effects in reducing cooking loss as the addition of 0.75 % salt with 0.45 % STPP. The addition of TF reduced hardness and springiness compared to the inclusion of 0.45 % STPP. Although the addition of STPP increased grittiness, the addition of TF did not affect grittiness. In conclusion, from the perspectives of cooking loss and sensory traits, TF alone or with 0.38 % salt can replace 0.75 % salt, and TF alone can also substitute for 0.45 % STPP, either alone or combined with 0.75 % salt, in chicken breast patties. The current study demonstrates that 2 % TF could be a good alternative in replacing 0.75 % salt and/or 0.45 % STPP for ground chicken breast products in marketplaces.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100604"},"PeriodicalIF":2.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance and carcass characteristics of Barred Plymouth Rock chickens in comparison to broilers 普利茅斯斑岩鸡与肉鸡的生产性能和胴体特性比较

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-09 DOI: 10.1016/j.japr.2025.100601

B.A. McCrea

The popularity of keeping small flocks of chickens has brought with it an interest in the production characteristics of heritage breeds of chicken. The definition of heritage chicken breed is one that physically conforms to the standards of the American Poultry Association; mates naturally; has a long, productive outdoor lifespan; and a slow growth rate. Production information on raising meat Barred Plymouth Rocks is lacking since research focuses have been on diet formulation and genetics for broiler production. This study was undertaken to determine the production efficiency of Barred Plymouth Rocks as compared to broilers in body weight, feed intake, FCR, mortality, footpad lesion scores, carcass dressing percentage, skin color, parts, organ weights, and both bone length and width.

There were significant differences in body weight between broilers and Barred Plymouth Rocks throughout the study. Barred Plymouth Rocks took 17 weeks to reach a live body weight that was 17.35 % smaller than that of the broilers at six weeks. The Barred Plymouth Rocks required more than twice as much feed to reach nearly the same body weight as that of the broiler. There was a significant difference between the two breeds with regard to FCR; the broilers being the more efficient breed. The Barred Plymouth Rock had a significantly lower carcass dressing percentage of just under 65 % as compared to just over 68 % in broilers. The Barred Plymouth Rocks were less efficient at developing muscle on the carcass and more efficient at building bones and internal organs, had lower mortality, yellower skin on the breast area, and lower footpad lesions scores. This information will aid producers of niche market heritage chickens in their decision-making when considering this breed for meat production.

饲养小群鸡的流行使人们对传统鸡品种的生产特点产生了兴趣。传统鸡的定义是符合美国家禽协会标准的鸡；自然交配的;具有较长的户外使用寿命；而且增长速度缓慢。由于研究的重点一直放在肉鸡生产的日粮配方和遗传学上，因此缺乏关于饲养肉鸡的生产信息。本试验旨在确定条纹普利茅斯岩鸡在体重、采食量、饲料比、死亡率、脚垫损伤评分、胴体屠宰率、皮肤颜色、部位、器官重量以及骨长和骨宽方面与肉鸡的生产效率。在整个研究过程中，肉仔鸡和棒状普利茅斯岩鸡的体重存在显著差异。条块普利茅斯岩鸡在17周内达到活重，比6周时的肉仔鸡小17.35%。为了达到与肉鸡几乎相同的体重，棒状普利茅斯岩鸡需要的饲料是肉鸡的两倍多。两个品种间FCR有显著差异；肉鸡是效率更高的品种。条纹普利茅斯岩肉鸡的胴体屠宰率低于65%，而肉鸡的胴体屠宰率略高于68%。条纹普利茅斯岩石在胴体上发育肌肉的效率较低，而在骨骼和内脏的形成方面效率较高，死亡率较低，乳房区域皮肤发黄，脚垫病变评分较低。这些信息将有助于利基市场传统鸡的生产者在考虑该品种用于肉类生产时做出决策。

{"title":"Performance and carcass characteristics of Barred Plymouth Rock chickens in comparison to broilers","authors":"B.A. McCrea","doi":"10.1016/j.japr.2025.100601","DOIUrl":"10.1016/j.japr.2025.100601","url":null,"abstract":"<div><div>The popularity of keeping small flocks of chickens has brought with it an interest in the production characteristics of heritage breeds of chicken. The definition of heritage chicken breed is one that physically conforms to the standards of the American Poultry Association; mates naturally; has a long, productive outdoor lifespan; and a slow growth rate. Production information on raising meat Barred Plymouth Rocks is lacking since research focuses have been on diet formulation and genetics for broiler production. This study was undertaken to determine the production efficiency of Barred Plymouth Rocks as compared to broilers in body weight, feed intake, FCR, mortality, footpad lesion scores, carcass dressing percentage, skin color, parts, organ weights, and both bone length and width.</div><div>There were significant differences in body weight between broilers and Barred Plymouth Rocks throughout the study. Barred Plymouth Rocks took 17 weeks to reach a live body weight that was 17.35 % smaller than that of the broilers at six weeks. The Barred Plymouth Rocks required more than twice as much feed to reach nearly the same body weight as that of the broiler. There was a significant difference between the two breeds with regard to FCR; the broilers being the more efficient breed. The Barred Plymouth Rock had a significantly lower carcass dressing percentage of just under 65 % as compared to just over 68 % in broilers. The Barred Plymouth Rocks were less efficient at developing muscle on the carcass and more efficient at building bones and internal organs, had lower mortality, yellower skin on the breast area, and lower footpad lesions scores. This information will aid producers of niche market heritage chickens in their decision-making when considering this breed for meat production.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100601"},"PeriodicalIF":2.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of different DNA extraction methods for the detection of Clostridium perfringens by loop-mediated isothermal amplification (LAMP) assay 环介导等温扩增（LAMP）法检测产气荚膜梭菌不同DNA提取方法的评价

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-05 DOI: 10.1016/j.japr.2025.100600

Deepa Chaudhary , Sabin Poudel , Chuan-Yu Hsu , Linan Jia , Anuraj T. Sukumaran , Xue Zhang , Wen-Hsing Cheng , Aaron S. Kiess , Kenneth S. Macklin , Li Zhang

Clostridium perfringens (C. perfringens) is a gram-positive bacterium that causes necrotic enteritis in poultry, resulting in significant economic losses. The development of a reliable and cost-effective diagnostic assay is crucial to prevent the spread of this bacterium. The loop-mediated isothermal amplification (LAMP) assay has emerged as a promising tool for in-field detection of C. perfringens. However, for effective implementation in low-resource settings, a simplified, low-cost DNA extraction method that minimizes equipment needs is crucial. This study aimed to identify an optimal DNA extraction method for the LAMP assay targeting C. perfringens detection. We evaluated four DNA extraction methods, Spin-column (SC), Magnetic Beads (MB), Dipstick (DS), and Hotshot (HS), based on DNA yield, purity, quality, and their compatibility with LAMP and PCR assays. The effectiveness of these methods was tested using spiked broiler feces with reference C. perfringens. Our findings indicated that SC and MB methods yielded DNA of higher purity and quality. Specifically, the SC method demonstrated superior performance in both LAMP and PCR assays across all tested C. perfringens strains. While the HS method was not the top performer, it proved to be the most practical for DNA extraction in resource-limited environments. Sensitivity tests for the LAMP assay showed the highest detection capability with SC-extracted DNA, while DS and HS methods exhibited lower sensitivity. In summary, this study provides valuable information for establishing a practical and adaptable diagnostic approach for C. perfringens detection in low-resource settings, with the HS-DNA extraction method as a feasible option for on-site LAMP assays.

产气荚膜梭菌（C. perfringens）是一种革兰氏阳性细菌，可引起家禽坏死性肠炎，造成重大经济损失。开发一种可靠和具有成本效益的诊断方法对于防止这种细菌的传播至关重要。环介导的等温扩增（LAMP）法已成为一种很有前途的现场检测产气荚膜荚膜梭菌的工具。然而，为了在低资源环境下有效实施，一种简化、低成本的DNA提取方法将设备需求降至最低是至关重要的。本研究旨在确定一种针对产气荚膜梭菌LAMP检测的最佳DNA提取方法。我们评估了四种DNA提取方法，Spin-column （SC）、Magnetic Beads （MB）、Dipstick （DS）和Hotshot (HS)，基于DNA产率、纯度、质量及其与LAMP和PCR的相容性。以含产气荚膜荚膜梭菌的肉鸡粪便为对照，验证了上述方法的有效性。我们的研究结果表明，SC和MB方法获得的DNA纯度和质量更高。具体而言，SC方法在所有测试的产气荚膜荚膜杆菌菌株的LAMP和PCR检测中都表现出优越的性能。虽然HS方法不是最好的，但它被证明是在资源有限的环境中最实用的DNA提取方法。LAMP法对sc提取的DNA的灵敏度最高，而DS和HS法的灵敏度较低。综上所述，本研究为在低资源环境下建立一种实用且适应性强的产气荚膜荚膜杆菌检测诊断方法提供了有价值的信息，其中HS-DNA提取方法是现场LAMP检测的可行选择。

{"title":"Evaluation of different DNA extraction methods for the detection of Clostridium perfringens by loop-mediated isothermal amplification (LAMP) assay","authors":"Deepa Chaudhary , Sabin Poudel , Chuan-Yu Hsu , Linan Jia , Anuraj T. Sukumaran , Xue Zhang , Wen-Hsing Cheng , Aaron S. Kiess , Kenneth S. Macklin , Li Zhang","doi":"10.1016/j.japr.2025.100600","DOIUrl":"10.1016/j.japr.2025.100600","url":null,"abstract":"<div><div><em>Clostridium perfringens</em> (<strong>C. perfringens</strong>) is a gram-positive bacterium that causes necrotic enteritis in poultry, resulting in significant economic losses. The development of a reliable and cost-effective diagnostic assay is crucial to prevent the spread of this bacterium. The loop-mediated isothermal amplification (LAMP) assay has emerged as a promising tool for in-field detection of <em>C. perfringens</em>. However, for effective implementation in low-resource settings, a simplified, low-cost DNA extraction method that minimizes equipment needs is crucial. This study aimed to identify an optimal DNA extraction method for the LAMP assay targeting <em>C. perfringens</em> detection. We evaluated four DNA extraction methods, Spin-column (<strong>SC</strong>), Magnetic Beads (<strong>MB</strong>), Dipstick (<strong>DS</strong>), and Hotshot (<strong>HS</strong>), based on DNA yield, purity, quality, and their compatibility with LAMP and PCR assays. The effectiveness of these methods was tested using spiked broiler feces with reference <em>C. perfringens</em>. Our findings indicated that SC and MB methods yielded DNA of higher purity and quality. Specifically, the SC method demonstrated superior performance in both LAMP and PCR assays across all tested <em>C. perfringens</em> strains. While the HS method was not the top performer, it proved to be the most practical for DNA extraction in resource-limited environments. Sensitivity tests for the LAMP assay showed the highest detection capability with SC-extracted DNA, while DS and HS methods exhibited lower sensitivity. In summary, this study provides valuable information for establishing a practical and adaptable diagnostic approach for <em>C. perfringens</em> detection in low-resource settings, with the HS-DNA extraction method as a feasible option for on-site LAMP assays.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100600"},"PeriodicalIF":2.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and testing of an indoor air scrubber for removing ammonia from air within poultry houses 用于去除禽舍空气中氨的室内空气洗涤器的开发和测试

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-03 DOI: 10.1016/j.japr.2025.100599

Philip A. Moore Jr. , Kelsey Anderson , Jerry Martin , Hong Li , Joseph L. Purswell

High levels of ammonia (NH₃) in poultry houses negatively affect bird BW, FCR, and disease resistance, and negatively affect the health of agricultural workers. The objectives of this research were to build and test the efficacy of a newly developed indoor air scrubber on reducing NH₃ concentrations. A full-scale prototype was constructed, and a series of experiments were conducted in a shop under various conditions using sulfuric acid for capturing NH₃. Dilute sulfuric acid (1%) was sprayed through 21 nozzles placed in six rows at multiple heights and orientations. Scrubbing efficiency was tested for two h at five NH₃ concentrations (10, 25, 50, 75 and 100 ppm) and two air flow rates (7,372 and 9,334 m³ h^-1) with three replications of each of the ten scenarios. The efficiency of the scrubber decreased with increases in air flow rate and NH₃ concentration. At the lower air flow rate the percent NH₃ reduction was 99, 98, 96, 94, and 93% when inflow concentrations were 10, 25, 50, 75, and 100 ppm NH₃, respectively, with corresponding outflow concentrations of 0.1, 0.7, 2.2, 4.2, and 7.3 ppm NH₃. At the higher flow rate, the percent reduction was 90, 91, 88, 87 and 87% at 10, 25, 50, 75 and 100 ppm NH₃, respectively, with corresponding outflow concentrations of 1.1, 2.4, 6.1, 9.9, and 13.1 ppm. When inflow NH₃ levels were relatively high (>50 ppm), the scrubber captured over 100 g N hr^-1. This technology would result in much lower NH₃ concentrations in poultry houses, which would improve poultry production and worker health, and capture valuable nitrogen fertilizer, while reducing air and water pollution

禽舍内氨（NH3）水平过高会对禽鸟体重、食积比和抗病能力产生负面影响，并对农业工人的健康产生负面影响。本研究的目的是建立和测试新开发的室内空气洗涤器对降低NH3浓度的功效。构建了全尺寸原型机，并在车间中进行了一系列实验，在各种条件下使用硫酸捕获NH3。稀硫酸（1%）通过6排不同高度和方向的21个喷嘴喷射。在5种NH3浓度（10、25、50、75和100 ppm）和2种空气流速（7,372和9,334 m3 h-1）下测试了2小时的洗涤效率，每种情况重复3次。随着空气流量和NH3浓度的增加，洗涤器的效率降低。在较低的空气流速下，当NH3流入浓度分别为10、25、50、75和100 ppm，流出浓度分别为0.1、0.7、2.2、4.2和7.3 ppm时，NH3减少率分别为99、98、96、94和93%。当NH3浓度分别为1.1、2.4、6.1、9.9和13.1 ppm时，当NH3浓度为10、25、50、75和100 ppm时，NH3的去除率分别为90%、91%、88%、87%和87%。当流入NH3水平相对较高（50 ppm）时，洗涤器捕获超过100 g N / hr-1。这项技术将大大降低禽舍中的NH3浓度，这将改善家禽生产和工人健康，并捕获宝贵的氮肥，同时减少空气和水污染

{"title":"Development and testing of an indoor air scrubber for removing ammonia from air within poultry houses","authors":"Philip A. Moore Jr. , Kelsey Anderson , Jerry Martin , Hong Li , Joseph L. Purswell","doi":"10.1016/j.japr.2025.100599","DOIUrl":"10.1016/j.japr.2025.100599","url":null,"abstract":"<div><div>High levels of ammonia (NH<sub>3</sub>) in poultry houses negatively affect bird BW, FCR, and disease resistance, and negatively affect the health of agricultural workers. The objectives of this research were to build and test the efficacy of a newly developed indoor air scrubber on reducing NH<sub>3</sub> concentrations. A full-scale prototype was constructed, and a series of experiments were conducted in a shop under various conditions using sulfuric acid for capturing NH<sub>3</sub>. Dilute sulfuric acid (1%) was sprayed through 21 nozzles placed in six rows at multiple heights and orientations. Scrubbing efficiency was tested for two h at five NH<sub>3</sub> concentrations (10, 25, 50, 75 and 100 ppm) and two air flow rates (7,372 and 9,334 m<sup>3</sup> h<sup>-1</sup>) with three replications of each of the ten scenarios. The efficiency of the scrubber decreased with increases in air flow rate and NH<sub>3</sub> concentration. At the lower air flow rate the percent NH<sub>3</sub> reduction was 99, 98, 96, 94, and 93% when inflow concentrations were 10, 25, 50, 75, and 100 ppm NH<sub>3</sub>, respectively, with corresponding outflow concentrations of 0.1, 0.7, 2.2, 4.2, and 7.3 ppm NH<sub>3</sub>. At the higher flow rate, the percent reduction was 90, 91, 88, 87 and 87% at 10, 25, 50, 75 and 100 ppm NH<sub>3</sub>, respectively, with corresponding outflow concentrations of 1.1, 2.4, 6.1, 9.9, and 13.1 ppm. When inflow NH<sub>3</sub> levels were relatively high (>50 ppm), the scrubber captured over 100 g N hr<sup>-1</sup>. This technology would result in much lower NH<sub>3</sub> concentrations in poultry houses, which would improve poultry production and worker health, and capture valuable nitrogen fertilizer, while reducing air and water pollution</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100599"},"PeriodicalIF":2.0,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Throughput agents alleviate concerns about pelleting broiler feed with low-moisture corn and large pellet die thicknesses 吞吐量剂减轻了对低水分玉米和大颗粒模厚度颗粒肉鸡饲料的担忧

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-03 DOI: 10.1016/j.japr.2025.100598

L.E. Knarr , K.M. Bowen , E.A. Lynch , E.B. Estanich , A.K. Renner , R.O. Adejumo , J. Ferrel , J.S. Moritz

Low-moisture corn, due to late harvesting and/or improper handling and storage, may negatively impact the pellet production rate (PPR) and pellet durability index (PDI). This is likely due to less lubrication and particle agglomeration associated with the lower moisture content. Recently, Azomite® (AZM) was tested in combination with 32-, 38-, and 45 mm pellet die thicknesses (PDT), which showed that incorporating 0.25 % AZM increased PPR and largely maintained PDI relative to the 0.0 % AZM control within each PDT. Additionally, past research has shown that the inclusion of mixer-added water (MAW) at levels of 1.50 to 3.00 % can increase PPR and PDI. Therefore, the objective of this experiment was to determine the influence of PDT, AZM, and MAW on PPR, PDI tested for 30 sec (PDI-30), PDI tested for 60 sec (PDI-60), and hot pellet temperature (HPT) of a broiler grower diet manufactured with low-moisture corn. Modifying PDT had a similar effect on PPR and PDI relative to previously published literature, where increasing PDT resulted in decreased PPR and increased PDI. Additionally, the incorporation of 0.25 % AZM and 1.50 % MAW returned similar increases in PPR; however, these effects were not additive. It could, therefore, be concluded that AZM and MAW are effective feed additives to increase feed manufacturing efficiency and/or feed quality. However, the anecdotal incidents of plugs and slips at the pellet die associated with the 1.5 % MAW inclusion should be considered, as these may cause an overall decrease in high-quality feed production.

低水分玉米，由于收获晚和/或处理和储存不当，可能会对颗粒产量（PPR）和颗粒耐久性指数（PDI）产生负面影响。这可能是由于较少的润滑和颗粒团聚与较低的水分含量有关。最近，Azomite®（AZM）与32、38和45 mm的颗粒模具厚度（PDT）结合进行了测试，结果表明，在每个PDT中，加入0.25%的AZM增加了PPR，并在很大程度上维持了PDI。此外，过去的研究表明，加入1.50至3.00 %的混合水（MAW）可以提高PPR和PDI。因此，本试验旨在研究PDT、AZM和MAW对低水分玉米肉鸡生长饲粮PPR、PDI测试30秒（PDI-30）、PDI测试60秒（PDI-60）和热粒温度（HPT）的影响。与先前发表的文献相比，修改PDT对PPR和PDI的影响相似，其中增加PDT导致PPR下降和PDI增加。此外，加入0.25% AZM和1.50% MAW后，PPR也有类似的增加；然而，这些影响并不是相加的。由此可见，AZM和MAW是提高饲料生产效率和饲料质量的有效饲料添加剂。然而，应该考虑到与1.5% MAW夹杂物相关的颗粒模具堵塞和滑动的轶事事件，因为这些可能导致高质量饲料产量的总体下降。

{"title":"Throughput agents alleviate concerns about pelleting broiler feed with low-moisture corn and large pellet die thicknesses","authors":"L.E. Knarr , K.M. Bowen , E.A. Lynch , E.B. Estanich , A.K. Renner , R.O. Adejumo , J. Ferrel , J.S. Moritz","doi":"10.1016/j.japr.2025.100598","DOIUrl":"10.1016/j.japr.2025.100598","url":null,"abstract":"<div><div>Low-moisture corn, due to late harvesting and/or improper handling and storage, may negatively impact the pellet production rate (PPR) and pellet durability index (PDI). This is likely due to less lubrication and particle agglomeration associated with the lower moisture content. Recently, Azomite® (AZM) was tested in combination with 32-, 38-, and 45 mm pellet die thicknesses (PDT), which showed that incorporating 0.25 % AZM increased PPR and largely maintained PDI relative to the 0.0 % AZM control within each PDT. Additionally, past research has shown that the inclusion of mixer-added water (MAW) at levels of 1.50 to 3.00 % can increase PPR and PDI. Therefore, the objective of this experiment was to determine the influence of PDT, AZM, and MAW on PPR, PDI tested for 30 sec (PDI-30), PDI tested for 60 sec (PDI-60), and hot pellet temperature (HPT) of a broiler grower diet manufactured with low-moisture corn. Modifying PDT had a similar effect on PPR and PDI relative to previously published literature, where increasing PDT resulted in decreased PPR and increased PDI. Additionally, the incorporation of 0.25 % AZM and 1.50 % MAW returned similar increases in PPR; however, these effects were not additive. It could, therefore, be concluded that AZM and MAW are effective feed additives to increase feed manufacturing efficiency and/or feed quality. However, the anecdotal incidents of plugs and slips at the pellet die associated with the 1.5 % MAW inclusion should be considered, as these may cause an overall decrease in high-quality feed production.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100598"},"PeriodicalIF":2.0,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of acidified clay and sodium bisulfate on litter ammonia, pH, total aerobic plate counts and broiler footpad dermatitis 酸化粘土和硫酸氢钠对凋落物氨、pH、好氧平板总数和肉鸡脚垫皮炎的影响

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-02 DOI: 10.1016/j.japr.2025.100597

J.B. Payne , D.M. Miles , K.L. Moncada , K. Gardner

Acidified clay and sodium bisulfate are common litter amendments utilized to control ammonia and lower pH in poultry litter. Three separate pen trials were conducted to compare the efficacy of both amendments for controlling litter ammonia, pH, total aerobic plate counts (APC), and improving footpad lesions in commercial broilers. A commercial broiler research farm was chosen as the test site. Day-old broiler chicks were placed in 40 pens (60 per pen for a total of 2400 birds) on used pine shavings. Pens were blocked within the house. Prior to placement pens were de-caked and top dressed as necessary. Treatments consisted of (1) control; (2) acidified clay and (3) sodium bisulfate. Composite litter surface samples were collected from each pen and analyzed for pH and APC on days 0-5. Litter surface ammonia concentrations were measured on days 0-5. Ammonia flux measurements were recorded on days 3 and 6. Broiler footpad lesion scores were assessed on day 38. Ammonia, pH, total APC and ammonia flux values were significantly lower in treated litter compared to values in the control. Ammonia concentrations in the acidified clay group were significantly lower than values in the sodium bisulfate group. On day 1, pH and total APC values in the acidified clay treated litter were lower than values in the sodium bisulfate treated litter. Average footpad lesion scores within a pen were significantly higher in the control group as compared to the acidified clay and sodium bisulfate groups. Additionally, average footpad lesion scores were significantly higher in the sodium bisulfate group as compared to the acidified clay group. Both litter amendments proved effective for controlling ammonia, pH, total APC and improving footpad dermatitis, supporting greater broiler rearing efficiency, productivity, and marketable broiler paws.

酸化粘土和硫酸氢钠是常用的凋落物改良剂，用于控制家禽凋落物中的氨和较低的pH值。通过3个单独的栏试验，比较两种添加剂在控制商品肉鸡窝产氨、pH、总需氧平板计数（APC）和改善脚垫病变方面的效果。选择一个商业肉鸡研究农场作为试验场地。将日龄肉鸡放在40个栏中（每栏60只，共2400只），放置在用过的松屑上。钢笔被锁在房子里。在放置笔之前，需要将笔去除结块并进行顶部修饰。处理包括(1)对照；(2)酸化粘土和(3)硫酸氢钠。在每个围栏收集复合凋落物表面样品，并于第0-5天分析pH和APC。第0 ~ 5天测定凋落物表面氨浓度。在第3天和第6天记录氨通量测量。第38天评估肉鸡脚垫病变评分。处理凋落物的氨、pH、总APC和氨通量值显著低于对照。酸化粘土组氨浓度显著低于亚硫酸氢钠组。第1天，酸化粘土处理凋落物的pH值和总APC值低于硫酸钠处理凋落物。与酸化粘土组和亚硫酸氢钠组相比，对照组在笔内的平均脚垫损伤评分明显更高。此外，与酸化粘土组相比，硫酸氢钠组的平均脚垫损伤评分明显更高。事实证明，这两种窝料添加剂都能有效控制氨、pH、总APC和改善脚垫皮炎，从而提高肉鸡饲养效率、生产力和肉鸡爪的适销性。

{"title":"Impact of acidified clay and sodium bisulfate on litter ammonia, pH, total aerobic plate counts and broiler footpad dermatitis","authors":"J.B. Payne , D.M. Miles , K.L. Moncada , K. Gardner","doi":"10.1016/j.japr.2025.100597","DOIUrl":"10.1016/j.japr.2025.100597","url":null,"abstract":"<div><div>Acidified clay and sodium bisulfate are common litter amendments utilized to control ammonia and lower pH in poultry litter. Three separate pen trials were conducted to compare the efficacy of both amendments for controlling litter ammonia, pH, total aerobic plate counts (APC), and improving footpad lesions in commercial broilers. A commercial broiler research farm was chosen as the test site. Day-old broiler chicks were placed in 40 pens (60 per pen for a total of 2400 birds) on used pine shavings. Pens were blocked within the house. Prior to placement pens were de-caked and top dressed as necessary. Treatments consisted of (1) control; (2) acidified clay and (3) sodium bisulfate. Composite litter surface samples were collected from each pen and analyzed for pH and APC on days 0-5. Litter surface ammonia concentrations were measured on days 0-5. Ammonia flux measurements were recorded on days 3 and 6. Broiler footpad lesion scores were assessed on day 38. Ammonia, pH, total APC and ammonia flux values were significantly lower in treated litter compared to values in the control. Ammonia concentrations in the acidified clay group were significantly lower than values in the sodium bisulfate group. On day 1, pH and total APC values in the acidified clay treated litter were lower than values in the sodium bisulfate treated litter. Average footpad lesion scores within a pen were significantly higher in the control group as compared to the acidified clay and sodium bisulfate groups. Additionally, average footpad lesion scores were significantly higher in the sodium bisulfate group as compared to the acidified clay group. Both litter amendments proved effective for controlling ammonia, pH, total APC and improving footpad dermatitis, supporting greater broiler rearing efficiency, productivity, and marketable broiler paws.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100597"},"PeriodicalIF":2.0,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in poultry nutrition book review edited by Todd J. Applegate 家禽营养书评进展，Todd J. Applegate编辑

IF 2 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research

Pub Date : 2025-09-01 DOI: 10.1016/j.japr.2025.100595

V.E. Ayres

引用次数: 0