低蛋白饮食中的最佳甘氨酸准许水平和 brojlers的动态需求模型
Yongfa Liu1, Yizhu Zhao1, Jiran Ma1
1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
Poultry science
|September 27, 2024
概括
在低蛋白质肉饮食中最佳的甘氨酸补充会促进生长和沉积. 理想的标准化叶消化 (SID) 甘氨酸+氨酸与氨酸的比率为137%,改善了传送基因表达.
科学领域:
- 动物营养 动物营养
- 禽畜科学 禽畜科学 禽畜科学
- 营养学就是营养学.
背景情况:
- 肉生产中使用低蛋白饮食,以减少排泄和对环境的影响.
- 氨基酸平衡,特别是甘氨酸,对于维持低蛋白饮食养肉的生长性能和生理功能至关重要.
- 了解糖氨酸补充剂对营养物质输送器的影响对于优化营养物质利用至关重要.
研究的目的:
- 为了确定牛肉 (29-42天) 的低蛋白饮食中最佳的甘氨酸补充水平.
- 为了研究不同水平的甘氨酸对肉生长,沉积和肠道载体基因表达的影响.
- 建立基于体重和平均每日增益的甘氨酸+血清需求的动态模型.
主要方法:
- 240只雄性肉被食18%的原蛋白,并补充了甘氨酸,以达到SID甘氨酸+血清与氨酸的比例为134%,140%和145%,相比之下,20%的原蛋白对照.
- 测量了生长性能,屠宰性能和沉积.
- 使用定量PCR分析了肠道氨基酸 (b0,+AT,EAAT3) 和葡萄糖 (SGLT1) 载体的mRNA表达水平.
主要成果:
- 标准化乳腺消化 (SID) 甘氨酸+氨酸与氨酸的比例为134%,支持与对照组相比的生长和屠宰性能.
- 通过回归分析,通过29-42天的肉的最佳SID甘氨酸 + 血清与溶氨酸比率被确定为137%.
- 通过适当的甘氨酸补充剂,十二指肠中b0,+AT,EAAT3和SGLT1基因的沉积率和mRNA表达显著上调.
结论:
- 在低蛋白饮食中适当补充甘氨酸是有效的改善肉生长性能和利用效率.
- 在29-42天的肉中,最佳的SID甘氨酸+氨酸对氨酸的比率为137%.
- 补充甘氨酸会影响关键肠道氨基酸和葡萄糖载体的表达,这表明它在营养吸收调节中的作用.
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