饲料研究2023，Vol.46Issue(24)：1-6,6.DOI:10.13557/j.cnki.issn1002-2813.2023.24.001
过瘤胃氨基酸水平对关岭犊牛生长性能、营养物质表观消化率及氮代谢的影响
Effect of rumen amino acid levels on growth performance,nutrient apparent digestibility and nitrogen metabolism of Guanling calves
摘要
Abstract
The experiment explored the effect of rumen lysine(RP-Lys)and methionine(RP-Met)on the growth performance,nutrient apparent digestibility and nitrogen metabolism of Guizhou Guanling calves aged 91～180 days.A total of 36 Guizhou Guanling calves were selected and randomly divided into four groups,with nine replicates in each group and one calf in each replicate.The calves in control group were fed a basal diet(group A),while the group B,group C and group D were supplemented with 15 g/d RP-Lys,15 g/d RP-Met and 15 g/d RP-Lys+15 g/d RP-Met to the basal diet of each calf,respectively.The trial period was 90 days.The results showed that compared with the control group,the calves in the experimental group demonstrated an increase in average daily weight gain,a decrease in nitrogen excretion in calf feces,and an improvement in the apparent digestibility of crude protein.The study indicates that adding 15 g/d RP-Lys+15 g/d RP-Met to the diet can promote calves growth and development,increase feed conversion rate,and reduce fecal N excretion,and there was no significant effect on the calves physical development.关键词
过瘤胃赖氨酸/过瘤胃蛋氨酸/生长性能/氮代谢/犊牛Key words
rumen passing lysine/rumen passing methionine/growth performance/nitrogen metabolism/calves分类
农业科技引用本文复制引用
罗进平,裴成江,李小冬,李世歌,吴道义..过瘤胃氨基酸水平对关岭犊牛生长性能、营养物质表观消化率及氮代谢的影响[J].饲料研究,2023,46(24):1-6,6.基金项目
黔科合支撑"关岭牛营养调控与养殖技术集成(项目编号:[2020]1Y036)" （项目编号:[2020]1Y036）
黔农科院青年科技基金"过瘤胃氨基酸对提高关岭牛生产性能技术集成与推广(项目编号:[2020]27号)" （项目编号:[2020]27号）
黔科合支撑"威宁黄牛营养调控及粗饲料高效利用关键技术研究与示范(项目编号:[2021]—般153)" （项目编号:[2021]—般153）
黔科合服企"喀斯特山区粮改饲技术集成示范与产业化(项目编号:[2021]12-03号)" （项目编号:[2021]12-03号）
