Journal of Applied Poultry Research最新文献

{"title":"Welfare and productivity in muscovy ducks: Impact of swimming pond availability","authors":"Lukáš Zita ,&nbsp;Ondřej Krunt ,&nbsp;Jitka Edrová ,&nbsp;Jakub Vorel ,&nbsp;Eva Chmelíková ,&nbsp;Antonella Dalle Zotte","doi":"10.1016/j.japr.2025.100628","DOIUrl":"10.1016/j.japr.2025.100628","url":null,"abstract":"<div><div>Housing conditions strongly influence both the welfare and productivity of farmed poultry. Muscovy ducks, unlike many other commercial species, are naturally adapted to water and may benefit from access to swimming facilities. In this study, we explored how providing a pond environment affects the overall health, growth, and product quality of these birds, while also considering natural differences between males and females. Ducks allowed to swim displayed better hygiene, with cleaner plumage and healthier eyes and nostrils, suggesting a direct link between water access and welfare. Their physiological status also indicated a more balanced metabolism. Growth patterns differed over time, but ultimately ducks with swimming access achieved similar or superior body development compared with those kept without water. Differences were also apparent in carcass composition and bone quality. Swimming birds carried less excess fat and produced stronger skeletal tissue with greater mineral content, outcomes that can be considered both a welfare and a production advantage. Sex differences were evident across many traits: males generally grew larger and had heavier carcasses, while females tended to show higher fat loss after processing. These observations underline that management practices interact with biological factors in shaping performance and meat quality. Overall, the findings demonstrate that incorporating swimming ponds into Muscovy duck housing not only enhances bird welfare by improving hygiene and natural behavior but also contributes to valuable production traits. Such housing adjustments may therefore represent a sustainable step forward in balancing animal welfare with the expectations of modern poultry production.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100628"},"PeriodicalIF":2.0,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462536","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}

{"title":"Dietary omega-3 fatty acids modulate meat quality and intestinal histology in high-density broiler production","authors":"Shahgol Rahbari,&nbsp;Seyed Davood Sharifi,&nbsp;Abdolreza Salehi,&nbsp;Abouzar Najafi,&nbsp;Shirin Honarbakhsh","doi":"10.1016/j.japr.2025.100627","DOIUrl":"10.1016/j.japr.2025.100627","url":null,"abstract":"<div><div>This study aimed to evaluate the effects of dietary omega-3 fatty acids on the growth performance, fatty acid composition of breast muscle, and histological characteristics of the intestine and breast muscle in broiler chicks reared under high-density condition. A total of 420 day-old Ross 308 broiler chicks were allocated to a 2 × 2 factorial design consisting of two stocking density (SD) levels (low: 9 birds/ m² and high: 17 birds/ m²) and two dietary omega-3 fatty acid levels (0 % and 0.5 %) over a 40-day experimental period. The results indicated that the average daily feed intake (ADFI) and average daily gain (ADG) were increased in the high SD group during the overall growth period (<em>P</em> &lt; 0.05). During the finisher phase (days 25–40), a significant interaction between high SD and the absence of omega-3 supplementation resulted in reduced ADFI (<em>P</em> &lt; 0.02). Conversely, broilers exposed to high SD and supplemented with 0.5 % dietary omega-3 fatty acids demonstrated a significantly greater ADG over the same period (<em>P</em> &lt; 0.02). High SD was also associated with a reduction in villus height (VH) and VH to crypt depth (CD) ratio (VH/CD; <em>P</em> &lt; 0.0001), accompanied by an increase in CD (<em>P</em> &lt; 0.03). Dietary omega-3 supplementation ameliorated the adverse histopathological changes in the intestine of broiler chicks subjected to high SD (<em>P</em> &lt; 0.05). Omega-3 supplementation significantly increased the diameter of breast muscle cell (<em>P</em> &lt; 0.05). High SD reduced the number of breast muscle cell (<em>P</em> &lt; 0.01), whereas omega-3 supplementation mitigated this effect by increasing the breast muscle cell count (<em>P</em> &lt; 0.002). Broiler chicks reared under high SD and supplemented with 0.5 % dietary omega-3 fatty acids exhibited a significant increase in the levels of alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) (<em>P</em> &lt; 0.0001). In conclusion, high SD adversely affects growth performance, intestinal structure, and breast muscle characteristics in broiler chicks. However, dietary supplementation with 0.5 % omega-3 fatty acids mitigates these effects by improving growth, intestinal histology, muscle fiber size and number, and breast meat fatty acid composition under high-density conditions.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"35 1","pages":"Article 100627"},"PeriodicalIF":2.0,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145578790","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}

{"title":"A survey of total nitrogen abundance in pullet and laying hen houses in Alberta, Canada","authors":"Joseph B.E. Saharchuk ,&nbsp;M. Faizal Abdul-Careem ,&nbsp;Hans D. Osthoff","doi":"10.1016/j.japr.2025.100619","DOIUrl":"10.1016/j.japr.2025.100619","url":null,"abstract":"<div><div>Ammonia (NH₃) is the most abundant alkaline gas in the atmosphere and a major contributor to aerosol formation in ambient air, impacting climate and human health. Agricultural practices are a major atmospheric source of NH₃ in the troposphere, yet observations of N-based compounds in agricultural settings have been sparse. This paper describes measurements of total nitrogen (N_t) and carbon dioxide (CO₂) in 14 Alberta laying hen facilities. Mixing ratios of N_t and nitrogen oxides (NO and NO_x) were monitored using a chemiluminescence (CL) instrument equipped with an automated inlet filter valve to differentiate between gas-phase and total (i.e., gas and aerosol phase), and mixing ratios of CO₂ were monitored using a non-dispersive infrared sensor (NDIR). The N_t budget was dominated by gas-phase NH₃ whose mixing ratio varied greatly between barns, from 0.2 to 16 parts-per-million by volume (ppm) and median level of 2.1 ppm, compliant with the industry's NH₃ standard of &lt; 25 ppm. Observed NO_x levels were in the range of 1.5 to 22.3 parts-per-billion by volume (ppb), median 11.3 ppb, and were negligible compared to N_t. Mixing ratios of CO₂ ranged from 629 to 2185 ppm (median 1639 ppm). Emission rates (ER) of NH₃ were estimated from the observed CO₂ enhancements relative to ambient air and an assumed ER of CO₂ of 71.5 g <span>d</span>^-1 bird^-1 and ranged from 0.005 to 0.136 g d^-1 bird^-1 (median 0.046 g <span>d</span>^-1 bird^-1). This work is the first examination of air quality in Alberta poultry barns from a total nitrogen perspective and sets a baseline for future studies.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100619"},"PeriodicalIF":2.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415848","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}

{"title":"Evaluation of the required level of L-threonine amino acid in the diet of Gilan native ducks up to the age of 7 weeks","authors":"M. Jamili Ghorab ,&nbsp;H. Aghdam Shahryar ,&nbsp;Y. Ebrahimnezhad ,&nbsp;T. Farahvash ,&nbsp;T. Vahdatpour ,&nbsp;A. Ghorbani","doi":"10.1016/j.japr.2025.100621","DOIUrl":"10.1016/j.japr.2025.100621","url":null,"abstract":"<div><div>This study aimed to evaluate the optimal level of threonine in the dietary of Gilan native ducks (mallard) from hatching up to seven weeks of age. Three hundred male Gilan native ducklings, with an average initial weight of 40 g, were randomly assigned to five dietary treatments with six replicates per treatment and ten ducks per replicate in a completely randomized design. The experimental period lasted seven weeks. Ducks were fed with diets containing 0.60, 0.65, 0.70, 0.80, and 0.85 percent of the threonine from 1 to 14 days of age and 0.60, 0.65, 0.70, 0.80, and 0.85 percent of threonine from 15 to 49 days of age. The results indicated that body weight gain, feed intake, and feed conversion ratio initially improved and subsequently declined with increasing dietary threonine levels. The 0.85 % threonine resulted in the lowest feed intake, feed conversion ratio, and body weight gain (<em>p</em> &lt; 0.05). Thigh and wing weights were highest at the 0.85 % dietary threonine level (<em>p</em> &lt; 0.05). Nevertheless, increasing dietary threonine significantly elevated monocyte counts, red blood cell volume (MCV), and superoxide dismutase activity (<em>p</em> &lt; 0.05). In conclusion, NRC-recommended threonine levels are appropriate for optimal growth performance in Gilan native ducks (mallard), and a 0.85 % dietary threonine level exerts positive effects on functional, biochemical, antioxidant, digestive, carcass traits, blood parameters, and intestinal morphology in these ducks.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"35 1","pages":"Article 100621"},"PeriodicalIF":2.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145578791","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}

{"title":"Dietary Licorice (Glycyrrhiza glabra) extract enhances growth performance, carcass traits, blood biochemistry, antioxidant status, and cecal microbiota in broiler chickens","authors":"Aya Rashad ,&nbsp;Ismail E. Ismail ,&nbsp;Elwy A. Ashour ,&nbsp;Mahmoud Kamal ,&nbsp;Ahmed K. Aldhalmi ,&nbsp;Waleed Alhujaili ,&nbsp;Mahmoud Moustafa ,&nbsp;Mohammed Al-Shehri ,&nbsp;Mohammad M.H. Khan ,&nbsp;Mohamed E. Abd El-Hack","doi":"10.1016/j.japr.2025.100623","DOIUrl":"10.1016/j.japr.2025.100623","url":null,"abstract":"<div><div>This study investigated the effects of licorice powder extract (LPE) supplementation via drinking water on growth performance, carcass characteristics, and selected hematobiochemical parameters in broiler chicks. A total of 280 Cobb 500 chicks (5 days old) were randomly allocated into four treatment groups, receiving water supplemented with 0 (control), 1.0, 2.0, or 3.0 mL LPE per liter for the duration of the experiment. Broilers receiving 3.0 mL LPE/L demonstrated significantly greater body weight than all other groups (<em>P</em> &lt; 0.05). LPE supplementation positively influenced feed intake and improved feed conversion ratio (FCR), with no significant effects on overall water consumption or carcass yield parameters. Birds administered 2.0 mL LPE/L showed a reduction in serum total protein and albumin levels, whereas no significant differences were observed in serum creatinine, aspartate aminotransferase (AST), or alanine aminotransferase (ALT). LPE supplementation also improved lipid metabolism, as evidenced by decreased levels of total cholesterol, triglycerides, low-density lipoprotein (LDL), and very-low-density lipoprotein (VLDL), alongside increased high-density lipoprotein (HDL), particularly in the 1.0 mL LPE/L group. Antioxidant status was significantly enhanced in the 3.0 mL LPE/L group, which exhibited elevated superoxide dismutase (SOD) activity and reduced malondialdehyde (MDA) concentrations. In conclusion, dietary supplementation with LPE improved growth performance, modulated serum lipid profiles, and enhanced antioxidant capacity in broiler chicks, suggesting its potential as a natural growth promoter and health modulator in poultry production.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100623"},"PeriodicalIF":2.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462550","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}

{"title":"Chlorella vulgaris supplementation in broiler feed: relation between dosage and effect on intestinal health under an Eimeria vaccine challenge","authors":"Sofie Van Nerom ,&nbsp;Kobe Buyse ,&nbsp;Filip Van Immerseel ,&nbsp;Johan Robbens ,&nbsp;Evelyne Delezie","doi":"10.1016/j.japr.2025.100625","DOIUrl":"10.1016/j.japr.2025.100625","url":null,"abstract":"<div><div>The broiler industry is facing increasing challenges due to the intensification of production and the associated rise in intestinal health issues. <em>Chlorella vulgaris</em>, a nutrient-rich microalga, may offer a sustainable antibiotic alternative to support gut health through its bioactive compounds. In this study, a dose-response trial was conducted to evaluate the health-promoting potential of microdoses (0-2%) of autotrophically grown <em>C. vulgaris</em> in broiler diets. Broilers were subjected to a mild <em>Eimeria</em> challenge to mimic industrial conditions and to induce stress in the intestinal tract. No significant linear relations were found between <em>C. vulgaris</em> inclusion level and intestinal histomorphology parameters. However, antioxidant capacity showed a trend toward linear increases with increasing algae inclusion. Feed viscosity increased significantly with <em>C. vulgaris</em> inclusion in the starter phase and fecal viscosity on day 23 showed a positive linear relation. A linear increase in breast meat redness (a*) and yellowness (b*) was observed on days 16 and 23. Body weight development and organ growth (bursa and spleen) were not significantly affected. In conclusion, while inclusion of <em>C. vulgaris</em> at microdose levels did not significantly alter intestinal morphology or growth performance, trends in antioxidant capacity, meat color, and spleen growth suggest potential health-promoting effects.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100625"},"PeriodicalIF":2.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358504","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}

{"title":"Effects of tryptophan supplementation in diets containing naturally contaminated corn with aflatoxin on growth performance, carcass traits, blood biochemistry, locomotor disorders, and intestinal morphology of broiler chickens","authors":"Saeed Ghasemi,&nbsp;Mohammad Hossein Shahir","doi":"10.1016/j.japr.2025.100624","DOIUrl":"10.1016/j.japr.2025.100624","url":null,"abstract":"<div><div>This study was conducted to investigate the effects of dietary tryptophan supplementation on the performance and health of broilers fed a diet containing moldy corn. In a completely randomized design, 420 five-day-old male broiler chickens were allocated to three dietary treatments for 23 days, each with ten replicates of 14 birds. The dietary treatments were: a control group (with uncontaminated corn), the MC group (where half of the corn in the control diet was replaced with the naturally contaminated moldy corn caused 7.6, 8.61, and 8.94 ppb aflatoxin B1 (AFB1) in the starter, grower, and finisher diets, respectively), and the MCTrp group (the MC diet plus 0.1 % L-tryptophan). Feeding the MC diet significantly impaired (P &lt; 0.05) body weight gain (BWG), feed intake (FI), and feed conversion ratio (FCR), as well as carcass yield and the relative weights of breast and thigh, compared to the control group. The birds fed the MC diet had lower (P &lt; 0.05) intestinal weight and villus height (VH). Feeding the MC diet led to deteriorated (P &lt; 0.05) gait scores and induced femoral head necrosis (FHN). Tryptophan supplementation (MCTrp) was effective (P &lt; 0.05) in alleviating the adverse effects of moldy corn inclusion on VH, gait score, serum alanine transaminase (ALT), and interleukin 6 (IL-6). In conclusion, marginally exceeding regulatory limits of mycotoxins in naturally contaminated corn impairs the performance and health of broiler chickens, and dietary tryptophan supplementation can mitigate some of the negative effects caused by the mycotoxins.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100624"},"PeriodicalIF":2.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358505","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}

{"title":"Evaluation of phytase products on performance and bone mineralization in low non-phytate phosphorus corn and soybean meal-based broiler starter diets","authors":"Elizabeth Lynch ,&nbsp;K. Bowen ,&nbsp;L. Knarr ,&nbsp;E. Estanich ,&nbsp;R. Adejumo ,&nbsp;J. Moritz","doi":"10.1016/j.japr.2025.100622","DOIUrl":"10.1016/j.japr.2025.100622","url":null,"abstract":"<div><div>The objective of this study was to evaluate corn/soybean meal-based starter diets that exclude inorganic P or contain low non-phytate phosphorous with phytase supplementation on bird performance, bone mineralization, and the effect on dicalcium phosphate equivalency. A PC and four NC treatments with graded levels of nPP were used to create a standard curve of increasing nPP levels. Phytase A was added to the NC1 (no DCP, nPP= 0.13 %) at 1,500 FTU/kg and 2,000FTU/kg (to overcome the low nPP value). Phytases A, B, and C were added to the NC2 (nPP=0.22 %) at 1,500FTU/kg to provide a commercially available phytase product comparison. Phytase A was also added to the PC (nPP= 0.5 %) at 1,500 FTU/ kg. Linear and quadratic regressions using SAS PROC REG were conducted to determine impacts of increasing levels of nPP. The NC1 and NC2 nPP level in a broiler starter mash diet decreased bird performance and bone parameters relative to a similar Ca:nPP ratio of the PC diet (0.95:0.5, <em>P</em> &lt; 0.05). A 1,500 FTU/kg inclusion of phytase A increased LWG, IBW, Pen FI, and tibia mineralization when compared to a 0.22 % nPP NC2 diet or NC2 diet containing either phytase B or C (<em>P</em> &lt; 0.05). Mortality for this study was not significant despite the low nPP level (<em>P</em> &gt; 0.05). The addition of phytase products to diets was not able to overcome nutrient detriment in inorganic phosphate free diets and varied in effectiveness in 0.22 % nPP diets.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100622"},"PeriodicalIF":2.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462549","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}

{"title":"Non-phytate phosphorous requirements of egg laying pullets from 9 to 12 weeks of age and carryover effects of phosphorous deficiency at 18 weeks of age","authors":"J.A. Blair ,&nbsp;V. Souza Pais ,&nbsp;M.E. Persia","doi":"10.1016/j.japr.2025.100620","DOIUrl":"10.1016/j.japr.2025.100620","url":null,"abstract":"<div><div>The non-phytate phosphorous (nPP) requirement of 9 to 12-week-old laying hen pullets was investigated using body weight gain (BWG), mortality corrected feed conversion ratio (FCRm), tibia ash percent (TAP) and tibia ash weight (TAW). The same pullets were transferred back to a standard diet and monitored for longer-term responses to the reduced nPP feeding over 9 to 12 weeks at 18 weeks of age. A total of 672 9-wk-old Hy-Line W36 laying hen pullets were distributed across 42 cages and randomly assigned one of seven dietary treatments (0.13, 0.16, 0.20, 0.23, 0.26, 0.29, and 0.32% nPP, and 0.90% calcium). At 12 wk of age 3 pullets per pen were euthanized for fat-free tibia ash determination. Data were analyzed using ANOVA in JMP Pro 16.0 (<em>P</em> ≤ 0.05). If significant differences were noted, single-slope broken line regression analysis was completed for BWG, FCRm, TAP and TAW. Only TAW responded to low nPP feeding generating a nPP requirement for 9 to 12 wk old laying hen pullets of 0.18% nPP. Body weight, FCRm and TAP were all unaffected by low nPP feeding. Remaining pullets from the 0.13, 0.16, 0.20 and 0.32% nPP treatments were maintained in their respective cages and phase- fed common corn-soybean meal diets from 12 to 18 wk of age. There were no carryover effects of feeding low phosphorous diets on pullet body weight or tibia ash at 18 wk. These data indicate that the nPP requirement for pullets from 9 to 12 wk of age is lower than current commercial recommendations based directly on TAW and indirectly by a lack of response to BWG, FCRm and TAP and pullets provided adequate nPP diets after a nPP deficiency from 9 to 12 wk were able to recover by 18 wk of age.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100620"},"PeriodicalIF":2.0,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358506","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}

{"title":"Informal nutrition symposium: Overview of the nutrient requirements of poultry, 10th revised edition","authors":"K.C. Klasing ,&nbsp;W.A. Dozier III ,&nbsp;G.G. Mateos ,&nbsp;M.E. Persia ,&nbsp;R.L. Walzem ,&nbsp;N. Sakomura ,&nbsp;M. Reis ,&nbsp;G. Viana ,&nbsp;R. Riveros ,&nbsp;R.G. Elkin ,&nbsp;C.R. Angel ,&nbsp;D.R. Korver","doi":"10.1016/j.japr.2025.100616","DOIUrl":"10.1016/j.japr.2025.100616","url":null,"abstract":"<div><div>The most recent (9th) edition of the National Research Council’s “Nutrient Requirement of Poultry” report was published in 1994. A new edition of this report is being prepared for release in 2025, by the National Academies of Science, Engineering and Medicine (NASEM). The 10th edition of the Nutrient Requirements of Poultry publication is substantially updated in terms of the volume of information included, reflecting the goal to serve a more educational purpose than previous reports. Wherever possible, nutrient requirement values have been updated to reflect the most current research. However, for many of the individual nutrients, little work has been done to determine the requirements of modern poultry strains. A preview of the updated NASEM report was presented during the Informal Nutrition Symposium at the 2024 Annual Meeting of the Poultry Science Association. Topics included overviews of each chapter, as well as identification of the substantial research gaps for most nutrients, and a discussion of the use and need for mathematical models to allow for prediction of nutrient requirements of the ever-changing genetics of commercial poultry.</div></div>","PeriodicalId":15240,"journal":{"name":"Journal of Applied Poultry Research","volume":"34 4","pages":"Article 100616"},"PeriodicalIF":2.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145415846","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}