Low crude protein amino acids diets for laying hens: Optimizing isoleucine levels for egg size, reduced nitrogen excretion and gut health

蛋鸡低粗蛋白氨基酸日粮：优化蛋大小的异亮氨酸水平、减少氮排泄和肠道健康

• 批准号: 521158-2017
• 负责人: Kiarie, Elijah
• 金额: $ 1.82万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640235
• 关键词: Low; crude; protein; amino; acids

Profitability and sustainability are very important considerations for our poultry customers. The poultry sector in Canada is intransition because of pressure to adopt alternative housing for layers (litter floors, cage-free) and to reduce the use of subtherapeutic antimicrobial growth promoters (AGP). Because of these regulatory and social pressures our poultry customers arelooking for solutions to minimize use of AGP and to decrease environmental impact particularly ammonia gas emissions in poultryhouses which have detrimental effects on birds and humans. Dietary crude protein concentration has a significant impact on theintestinal microbiota, both qualitatively and quantitatively. For example, several studies indicate that high protein diets with excessand unbalanced amino acid profiles increase the concentrations of pathogenic bacteria and toxic metabolites in the gut. Therefore,adjusting protein supply and amino acid profiles can be considered as essential to achieve optimal performance and to control theintestinal pathogens with implication to bird and human health through contaminated poultry products. Moreover, reducing dietarycrude protein leads to reduced nitrogen in the excreta with less potential for microbial conversion to ammonia. . We are specificallyinterested in determining optimal isoleucine requirements in low crude protein diets as this amino acid has been associated withpoor performance (egg size) in these diets. Therefore, isoleucine, is a technical challenge where research data is lacking tosupport formulation decisions..Ontario

盈利能力和可持续性是我们家禽客户非常重要的考虑因素。加拿大的家禽业处于转型期，因为有压力要求采用替代性蛋鸡饲养方式（垫料层、无笼），并减少使用亚治疗性抗菌生长促进剂。由于这些监管和社会压力，我们的家禽客户正在寻找解决方案，以尽量减少AGP的使用，并减少对环境的影响，特别是家禽舍中对鸟类和人类有不利影响的氨气排放.日粮粗蛋白质浓度对肠道菌群有显著的定性和定量影响。例如，几项研究表明，高蛋白饮食与过量和不平衡的氨基酸谱增加了肠道中致病菌和有毒代谢物的浓度。因此，调整蛋白质供给和氨基酸谱可以被认为是至关重要的，以实现最佳性能和控制肠道病原体的影响，鸟类和人类的健康，通过污染的家禽产品。此外，减少膳食粗蛋白导致排泄物中的氮减少，微生物转化为氨的可能性较小。.我们特别感兴趣的是确定低粗蛋白日粮中异亮氨酸的最佳需要量，因为这种氨基酸与这些日粮中的不良性能（鸡蛋大小）有关。因此，异亮氨酸是一个技术挑战，缺乏研究数据来支持配方决策。安大略