摘要
试验探究了在舍饲条件下,不同营养水平日粮对生长期牦牛生长性能和营养物质表观消化率的影响。选取18头健康、体况接近生长期阉牦牛,随机分为3个处理组,每组6个重复,营养水平分别为低营养组(代谢能8.27 MJ/kg,蛋白质14.42%)、中营养组(代谢能10.22 MJ/kg,蛋白质15.17%)、高营养组(代谢能11.92 MJ/kg,蛋白质17.90%)。全收粪法连续4 d收粪,测定其常规指标,试验初期和末期分别称重。结果表明:中营养组和高营养组平均日增重、日粮粗蛋白(CP)、粗脂肪(EE)和钙(Ca)消化率均显著高于低营养组(P<0.05);中营养组和低营养组的NDF和ADF消化率均显著高于高营养组(P<0.05)。因此,日粮代谢能10.22 MJ/kg,蛋白质15.17%时,营养物质表观消化率及牦牛体增重较好。
The experiment was to explore the effect of different diets on growth performance and apparent digestibility of nutrients in growing period yaks by barn-feeding. 18 heads of growing health cas- trated yaks were selected, and randomly divided into three treatment groups（n=6）. The three different diets were low-nutrition diets; middle-nutrition high-nutrition diets, to collect the feces continuously for 4 d, measured its conventional indexes, at the begining of the test and the end of the test, yaks were weigh respectively. The results showed that： the average daily gain and apparent digestibility of CP, EE, Ca in high-nutrition and the middle-nutrition groups were significantly higher than low-nutrition groups（P〈0.05）; Apparent digestibility of nutrient and daily gain in middle-nutrition （metabolizable energy 10.22 MJ/kg, proteinlS.17%）was better than others.
出处
《饲料工业》
北大核心
2015年第17期42-46,共5页
Feed Industry
基金
国家重点基础研究发展计划(973项目)[2012CB722906]
青海省重大科技平台建设项目[2011-ZY12A
2012-Z-Y08
2013-Z-Y03]
关键词
营养水平
生长期牦牛
生产性能
表观消化率
nutrition level
yaks
production performance
nutrition apparent digestibility
