饲料研究2025，Vol.48Issue(2)：17-21,5.DOI:10.13557/j.cnki.issn1002-2813.2025.02.004
复合包被氨基酸对暖季泌乳牦牛泌乳量、乳成分及血浆指标的影响
Effects of compound coated amino acids on milk yield,milk composition,and plasma indices in lactating yaks during warm season
摘要
Abstract
The experiment aimed to explore the effects of compound coated amino acids on the milk yield,milk composition,and plasma indices in lactating yaks during the warm season.Twelve Niangya yaks from Jiali County,with similar parity,calving dates,and body weight(230±30)kg,were selected and randomly divided into two groups,each with six replicates,and each replicate consisting of one lactating yak.The control group was fed through grazing and supplementary feeding,while the coated amino acids group added 15 g/(head·d)of coated methionine+50 g/(head·d)of coated lysine+30 g/(head·d)of coated choline to the supplementary feeding.The pre-test period was one week,and the formal test period was five weeks.The results showed that compared to the control group,the milk yield on day 18 and milk fat percentage on day 35 were significantly increased in the coated amino acids group(P＜0.05).The total cholesterol(TG)and glucose(GLU)concentrations on days 18 and 35 of the coated amino acids group,and the total protein(TP)and triglyceride(TC)concentrations on day 18 were significantly increased(P＜0.05),while the plasma urea nitrogen(BUN)content on day 35 was significantly decreased(P＜0.05).The total superoxide dismutase(T-SOD)activity on days 18 and 35 in the plasma of the coated amino acids group was significantly increased(P＜0.05),and the malondialdehyde(MDA)content on day 35 was significantly decreased(P＜0.05).The interleukin-2(IL-2)content in the plasma of the coated amino acids group on day 18 was significantly decreased(P＜0.05),while the immunoglobulin G(IgG)content on day 35 was significantly increased(P＜0.05).The study indicates that compound coated amino acids can improve milk yield,antioxidant capacity,and immune function in yaks during the warm season.关键词
包被氨基酸/泌乳牦牛/暖季/产奶量/乳成分/血浆指标Key words
coated amino acid/lactating yaks/warm season/milk yield/milk composition/plasma indices分类
农业科技引用本文复制引用
洛桑顿珠,张楠,欧杰次仁,时军,刘世林,巴桑旺堆,姜南..复合包被氨基酸对暖季泌乳牦牛泌乳量、乳成分及血浆指标的影响[J].饲料研究,2025,48(2):17-21,5.基金项目
西藏自治区重大科技专项(项目编号:XZ202101ZD0002N) （项目编号:XZ202101ZD0002N）
国家重点研发计划课题(项目编号:2021YFD1600200) （项目编号:2021YFD1600200）
