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Chitosan associated with technical cashew nut shell liquid in supplements for grazing beef steers: nitrogen balance and rumen metabolism 壳聚糖与技术腰果壳液在放牧牛饲粮中的作用:氮平衡和瘤胃代谢
IF 1.8 3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-27 DOI: 10.1080/00288233.2023.2285805
Nayara Gonçalves Silva, Rafael Henrique Tonissi e Buschinelli de Goes, Raquel Tenório Oliveira, Jefferson Rodrigues Gandra, Nara Regina Brandão Cônsolo, Mariana Viegas dos Santos, Douglas Gabriel Anschau, Gleice Kélen Rodrigues da Silva, Fernanda Naiara Fogaça da Cruz, Lara de Souza Oliveira, Yasmin Gonçalves da Silva de Souza
The aim of this study was to evaluate the inclusion of the chitosan (CHI) and technical cashew nutshell liquid (CNSLT) on nitrogen metabolism and ruminal fermentation on pasture system. Five steers...
本试验旨在研究壳聚糖(CHI)与技术腰果液(CNSLT)包合对牧草氮代谢和瘤胃发酵的影响。五个引导……
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引用次数: 0
Effect of new strains of Lentilactobacillus buchneri as inoculants in sorghum silage on the fermentative profile, aerobic stability, and voluntary intake in lambs 新型布氏慢乳杆菌接种高粱青贮对羔羊发酵特性、有氧稳定性和自愿采食量的影响
IF 1.8 3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-26 DOI: 10.1080/00288233.2023.2287717
Wagner Sousa Alves, Odilon Gomes Pereira, Alberto Jefferson da Silva Macêdo, Gabriela Duarte Oliveira Leite, Vanessa Paula da Silva, Patrícia Siqueira Leite, Karina Guimarães Ribeiro, Sebastião de Campos Valadares Filho
We evaluated the effects of various wild strains of Lentilactobacillus buchneri on the fermentation and aerobic stability of sorghum silages as well as on their intake, digestibility, nitrogen bala...
研究了不同野生菌株布氏慢乳杆菌对高粱青贮的发酵、好氧稳定性、采食量、消化率、氮平衡和饲料质量的影响。
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引用次数: 0
Recessive and dominant inheritance patterns associated with synonymous differences in wool fibre curvature and medullation 隐性和显性遗传模式与羊毛纤维弯曲度和髓质的同义差异有关
IF 1.8 3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-26 DOI: 10.1080/00288233.2023.2274404
David Scobie, Chikako van Koten, Marina Richena, Jeffrey Plowman, Duane Harland
Segregation into lustrous and wild-type birth coats suggested both dominant and recessive inheritance patterns associated with birth coat and subsequently with low wool fibre curvature at lamb and ...
有光泽和野生型毛毛的分离表明,与毛毛相关的显性和隐性遗传模式以及随后的低羊毛纤维弯曲度在羔羊和…
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引用次数: 0
The effect of prepartum synthetic zeolite supplementation on the eating, lying and activity behaviours of grazing dairy cows 饲粮中添加合成沸石对放牧奶牛进食、躺卧和活动行为的影响
IF 1.8 3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-22 DOI: 10.1080/00288233.2023.2283052
Jessica I. Dalton, Stacey J. Hendriks, John R. Roche, Danny J. Donaghy, Brian Dela Rue, Barbara Kuhn-Sherlock, Claire V. C. Phyn
This study determined the effect of feeding synthetic zeolite A prepartum to reduce periparturient hypocalcaemia risk on the eating, lying, and activity behaviours of multiparous grazing dairy cows...
本研究确定了饲喂合成沸石A制剂以降低围产期低钙血症风险对多产放牧奶牛进食、躺卧和活动行为的影响。
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引用次数: 0
Ewe culling in New Zealand: an interview study of 38 farmers 新西兰母羊淘汰:对38名农民的访谈研究
IF 1.8 3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-19 DOI: 10.1080/00288233.2023.2280624
Anne L. Ridler, Paul R. Kenyon, Andy W. Greer, Chris M. Logan, Sarah Morgan, Rene A. Corner-Thomas
Removal of ewes from a flock before the end of their productive life, sometimes described as ewe wastage, can potentially lead to reduced flock productivity. While the main reasons for culling ewes...
在母羊的生产寿命结束之前将其从羊群中移除,有时被称为母羊浪费,可能会导致羊群生产力下降。尽管淘汰母羊的主要原因是……
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引用次数: 0
Relationships between dietary factors and nitrogen partitioning to milk and urine in temperate grazing dairy cattle 饲粮因素与温带放牧奶牛氮对奶和尿分配的关系
3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-12 DOI: 10.1080/00288233.2023.2278734
David Pacheco, Chris Glassey, Charissa Thomas, Stewart F. Ledgard, Lisa A. Box, Brendon G. Welten, Paul R. Shorten
ABSTRACTUrinary nitrogen (UN) excretion and milk production traits of 35 groups of 15 grazing cows each were measured over two years. Urine volume and N concentration were measured with urine sensors and daily UN excretion was calculated for four consecutive days. Milk yield, composition and cow liveweight (LW) were used to estimate daily dry matter intakes (DMI) based on back-calculated animal energy requirements and feed metabolisable energy (ME). Different N fractions in the diet were estimated using laboratory data and protein digestion equations. Mean estimates of N intake and UN excretion were 460 and 227 g N/d, respectively. Urinary-N represented 52% of the N consumed, which aligns with indoor N balance studies. Urinary N excretion was weakly correlated (r = 0.29) with dietary N intake, but moderately correlated (r = 0.63–0.67) with diet N concentration, diet N:ME ratio, and diet effective rumen degradable protein (ERDP). The ERDP balance had moderate to strong correlations with N utilisation efficiency (r = −0.89) and the UN expressed relative to N intake (r = 0.59) and N in milk (r = 0.78). These relationships illustrate the potential of urine sensors and energy-based estimations of intake to assess the influence of dietary management strategies to mitigate UN excretion from grazing animals.KEYWORDS: Urine sensorsnitrogenmilk proteinrumen degradable proteinintake AcknowledgementsData collection and analyses in this study were conducted under the Low N Livestock and Low N Systems programmes, which are funded by New Zealand dairy farmers through DairyNZ Incorporated and by the Ministry of Business, Innovation and Employment (contract #DRCX1701). Additional co-funding and in-kind support are received from CRV and Fonterra. We are thankful to the staff at each of the sites used to collect the data during the field studies, as well as staff at DairyNZ for the collation of different streams of data for the analyses presented here.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by DairyNZ [Grant Number CRS2651]; Ministry of Business, Innovation and Employment [Grant Number DRCX1701].
摘要对35组15头放牧奶牛进行了为期2年的氮素排泄和产奶量性状测定。用尿液传感器测量尿量和氮浓度,连续4天计算每日UN排泄量。根据动物能量需要量和饲料代谢能(ME),采用产奶量、成分和奶牛活重(LW)估算日干物质采食量(DMI)。利用实验室数据和蛋白质消化方程估算饲粮中不同N组分。平均估计N摄入量和UN排泄量分别为460和227 g N/d。尿氮占所消耗氮的52%,这与室内氮平衡研究一致。尿氮排泄量与饲粮氮摄入量呈弱相关(r = 0.29),与饲粮氮浓度、饲粮氮代谢比和饲粮有效瘤胃可降解蛋白(ERDP)呈中度相关(r = 0.63 ~ 0.67)。ERDP平衡与氮利用效率(r = - 0.89)、UN与氮摄入量(r = 0.59)和牛奶中氮含量(r = 0.78)有中强相关性。这些关系说明了尿液传感器和基于能量的摄入估计在评估饮食管理策略对减少放牧动物排泄UN的影响方面的潜力。本研究的数据收集和分析是在低氮牲畜和低氮系统项目下进行的,该项目由新西兰奶农通过dairy ynz公司和商业、创新和就业部(合同号DRCX1701)资助。CRV和恒天然还提供了额外的共同资金和实物支持。我们感谢在实地研究中收集数据的每个站点的工作人员,也感谢DairyNZ的工作人员,他们为本文提供的分析整理了不同的数据流。披露声明作者未报告潜在的利益冲突。本研究由DairyNZ支持[批准号CRS2651];经济、创新和就业部[批准号DRCX1701]。
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引用次数: 0
Effect of breed and stage of lactation on the solid fat content of milk from cows milked once a day or twice a day 奶牛品种和泌乳期对一日挤奶一次或一日两次乳固体脂肪含量的影响
3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-12 DOI: 10.1080/00288233.2023.2278733
Inthujaa Sanjayaranj, Nicolas López-Villalobos, Hugh T. Blair, Patrick W. M. Janssen, Stephen E. Holroyd, Alastair K. H. MacGibbon
Solid fat content at 10°C (SFC10) is an important parameter of milk fat that influences the spreadability of butter. This study aimed to evaluate the effect of breed and stage of lactation on SFC10 of milk fat from cows milked once a day (OAD) or twice a day (TAD). Milk was collected from 39 Holstein-Friesian (F), 27 Jersey (J), and 34 Holstein-Friesian × Jersey (F × J) cows from a OAD herd and 104 F and 83 F × J cows from a TAD herd in early, mid and late lactation. The SFC10 was predicted using a regression model using milk fatty acid composition. The lower the SFC10, the higher the spreadability of butter. The SFC10 was lower (P < 0.05) for F cows compared with J cows milked OAD. The SFC10 was lower (P < 0.05) for F cows compared with F × J cows milked TAD. The SFC10 was lower in early lactation compared with mid- and late lactation in both milking frequencies. This study revealed that F cow milk and early lactation milk would be suitable for making more easily spreadable butter in OAD and TAD milking. These results could be applicable in the New Zealand dairy industry if consumer preference for more easily spreadable butter increases.
10℃时固体脂肪含量(SFC10)是影响牛油涂抹性的重要参数。本试验旨在研究奶牛品种和泌乳期对1天挤奶1次(OAD)和2天挤奶1次(TAD)乳脂SFC10的影响。在泌乳期的前、中、后期,从OAD奶牛群中采集39头荷斯坦-弗里西亚奶牛(F)、27头泽西奶牛(J)和34头荷斯坦-弗里西亚×泽西奶牛(F × J),从TAD奶牛群中采集104头F奶牛和83头F × J奶牛。采用牛奶脂肪酸组成回归模型预测SFC10。SFC10越低,黄油的涂抹性越高。F奶牛的SFC10低于J奶牛(P < 0.05)。F奶牛的SFC10低于F × J奶牛(P < 0.05)。两种挤奶频率下,泌乳早期的SFC10均低于泌乳中期和晚期。本研究表明,F牛乳和泌乳早期乳适合制作易于涂抹的牛油。如果消费者对更容易涂抹的黄油的偏好增加,这些结果可能适用于新西兰乳制品行业。
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引用次数: 0
The influence of the number of lambs present on the suckling behaviour of triplet-rearing ewes at pasture 羔数对牧场三胞胎母羊哺乳行为的影响
3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-08 DOI: 10.1080/00288233.2023.2277231
Rene A. Corner-Thomas, Rachel Shanks, Ngaio J. Beausoleil
This study examined the suckling behaviour of triplet-rearing ewes for three days post-parturition. Twenty-six ewes were enrolled with 11 being observed for the entire 3-days post-lambing. The behaviour of the ewe, number of lambs present at the end of the event and the behaviour that terminated the event were recorded for each suckling event. The mean suckling event duration increased when additional lambs were present at the end of the suckling event. Ewes that had observations across all three days showed no change in the number of suckling events over time, but suckling events tended to be shorter on day 3 than on days 1 or 2. On day 1 more suckling events were terminated by the ewe walking away from her lambs than on days 2 and 3. The odds of a ewe walking away to terminate the suckling event were greater when three lambs were present compared with two. Ewes showed more inactive behaviours when more lambs were present at the end of the suckling event. The results partially supported the hypothesis that the ewe would be more likely to terminate a suckling event when three lambs were attempting to suck compared with one or two lambs.
本研究考察了三胞胎母羊分娩后三天的哺乳行为。试验选取了26只母羊,其中11只母羊在产羔后进行了为期3天的观察。记录每个哺乳事件中母羊的行为,事件结束时存在的羔羊数量以及结束事件的行为。当哺乳期结束时增加羔羊时,平均哺乳期持续时间增加。在所有三天的观察中,母羊的哺乳次数没有随着时间的推移而变化,但哺乳事件在第3天往往比第1天或第2天短。与第2天和第3天相比,第1天母羊离开羔羊而终止哺乳的事件较多。当有三只羊羔在场时,母羊走开终止哺乳的几率要比两只大。在哺乳结束时,当更多的羔羊出现时,母羊表现出更多的不活跃行为。研究结果部分支持了一个假设,即当三只羊羔试图吮吸时,母羊比一只或两只羊羔更有可能终止一次哺乳活动。
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引用次数: 0
Performance of grazing sheep kept on tamani grass supplemented with Parkia platycephala pods replacing corn in the multiple supplements 在多种补充条件下,以柞蚕草代替玉米对放牧羊生产性能的影响
3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-08 DOI: 10.1080/00288233.2023.2259344
Juliana Rodrigues Lacerda Lima, Rosane Cláudia Rodrigues, Giovanne Oliveira Costa Sousa, Ana Paula Ribeiro de Jesus, Ana Claudia da Costa, Alessandra Schaphauser Rosseto Fonseca, Luciano da Silva Cabral, Clésio dos Santos Costa, Juliana Silva de Oliveira, Eduarda Castro da Silva
ABSTRACTThis study aimed to evaluate the effect of Parkia platycephala pods in the supplements for grazing sheep on intake, digestibility, and animal performance. Twenty-four sheep (21.26 ± 2.87 kg) were used by a completely randomised design with six animals per treatment. The evaluated treatments were mineral salt (MS), mineral salt + urea/ammonium sulfate (urea-supplement; UR), multiple supplements based on corn + soybean meal (MSCS), and multiple supplements in which P. platycephala pods replaced 50% of corn (MSPP). The supplements evaluated did not affect pasture intake, and total dry matter (DM) intake was higher for animals fed multiple or UR than those fed with MS. Sheep fed multiple supplements presented 55.57% higher crude protein (CP) intake than those fed MS or UR. Neutral detergent fibre intake was 17.76% lower in sheep fed MS than those fed other supplements. Animals fed multiple supplements presented higher digestibility for DM and CP than those fed MS or US. Animals fed multiple supplements presented 54.61% higher total body weight gain and 54.79% higher average daily gain than those fed MS or US. Thus, Parkia platycephala pods can replace 50% of corn in multiple supplements without compromising the performance of grazing sheep.KEYWORDS: Biometricsentrance heightlight interceptionParkia platycephalastocking rate Disclosure statementNo potential conflict of interest was reported by the author(s).
摘要本研究旨在评价放牧绵羊饲粮中添加白头球豆荚对其采食量、消化率和生产性能的影响。24只羊(21.26±2.87 kg)采用完全随机设计,每组6只。评价处理为无机盐(MS)、无机盐+尿素/硫酸铵(尿素补充;UR)、以玉米+豆粕为基础的复合添加物(MSCS)和以天牛豆荚代替50%玉米的复合添加物(MSPP)。饲粮中添加多种微量元素对采食量没有影响,且饲粮中添加多种微量元素的羊的总干物质(DM)采食量高于饲粮中添加多种微量元素的羊,其粗蛋白质(CP)采食量比饲粮中添加多种微量元素的羊高55.57%。饲喂MS的绵羊中性洗涤纤维摄入量比饲喂其他补充剂的绵羊低17.76%。饲喂多种添加剂的动物对粗脂肪和粗蛋白质的消化率高于饲喂MS或US的动物。与MS和US相比,饲喂多种添加剂的动物总增重提高54.61%,平均日增重提高54.79%。因此,在不影响放牧羊生产性能的情况下,在多种补充物中,白头雁豆荚可以替代50%的玉米。关键词:生物特征识别;高光截获;帕金森病;白头;
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引用次数: 0
Nitrous oxide emission factors for fertiliser ammonium sulphate, diammonium phosphate, and urea 肥料硫酸铵,磷酸二铵和尿素的氧化亚氮排放因子
3区 农林科学 Q1 Agricultural and Biological Sciences Pub Date : 2023-11-02 DOI: 10.1080/00288233.2023.2277916
Jiafa Luo, Tony van der Weerden, Surinder Saggar, Hong J. Di, Andriy Podolyan, Kamal Adhikari, Keren Ding, Stuart Lindsey, Dongwen Luo, Lily Ouyang, Alison Rutherford
This study determined the nitrous oxide emission factors (EF1, the percentage of N2O emitted as a proportion of fertiliser N applied) for fertilisers ammonium sulphate (AS), diammonium phosphate (DAP), and urea under the same field conditions. Trials were conducted on pasture soils across four sites (Waikato, Manawatu, Canterbury and Otago) in New Zealand during late autumn and spring of 2022. The average EF1 values for urea across all four sites were 0.128% (95% C.I., 0.023% and 0.249%) in late autumn and 0.136% (95% C.I., 0.031% and 0.259%) in spring. The corresponding EF1 values for AS were 0.125% (95% C.I., – 0.021% and 0.246%) in late autumn and 0.083% (95% C.I., 0.015% and 0.197%) in spring, while for DAP, they were 0.049% (95% C.I., – 0.044% and 0.157%) in late autumn and 0.090% (95% C.I., -0.009% and 0.205%) in spring. The mean EF1 values across all four sites and two seasons were calculated as 0.132% (95% C.I., 0.016% and 0.269%) for urea, 0.104% (95% C.I., – 0.008% and 0.235%) for AS, and 0.069% (95% C.I., – 0.036 and 0.194) for DAP. No significant differences in EF1 were observed between the three fertilisers (P > 0.05) at individual sites or when considering all four sites collectively.
本研究测定了相同田间条件下,硫酸铵(as)、磷酸二铵(DAP)和尿素的氧化亚氮排放因子(EF1, N2O排放量占施氮量的百分比)。试验于2022年深秋和春季在新西兰的四个地点(怀卡托、马纳瓦图、坎特伯雷和奥塔哥)的牧场土壤上进行。4个试验点对尿素的平均EF1值在深秋为0.128% (95% ci、0.023%和0.249%),在春季为0.136% (95% ci、0.031%和0.259%)。AS在深秋和春季分别为0.125% (95% ci、- 0.021%和0.246%)和0.083% (95% ci、- 0.015%和0.197%),DAP在深秋分别为0.049% (95% ci、- 0.044%和0.157%)和0.090% (95% ci、-0.009%和0.205%)。尿素的平均EF1值为0.132% (95% c.i., 0.016%和0.269%),as为0.104% (95% c.i., - 0.008%和0.235%),DAP为0.069% (95% c.i., - 0.036和0.194)。3种肥料的EF1在个别地点或综合考虑4个地点均无显著差异(P > 0.05)。
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引用次数: 0
期刊
New Zealand Journal of Agricultural Research
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