中国畜牧兽医2018，Vol.45Issue(5)：1219-1225,7.DOI:10.16431/j.cnki.1671-7236.2018.05.012
不同能量水平精料对日本和牛与雷琼牛杂交牛生长性能和血浆生化指标的影响
Effects of Concentrates with Different Energy Levels on Growth Performance and Plasma Biochemical Indices in Wagyu and Leiqiong Crossbreed Cattle
摘要
Abstract
The objective of this study was to investigate the effect of concentrates with different energy levels on the grow th performance and plasma biochemical indices in Wagyu × Leiqiong crossbreed cattle,and determine the optimized dietary component.42 15-month-old Wagyu × Leiqiong crossbreed bull were chosen and divided randomly into 3 groups,and cattle in groups Ⅰ,Ⅱ and Ⅲ were fed concentrates with different energy levels,of which the total net energy(NEmf) were 6.43,6.90 and 7.50 MJ/kg,respectively.The experiment lasted for 90 days,the body weight was measured every 30 d,and blood samples were collected and plasma biochemical indices were determined at the beginning and ending of the experiment.The results showed that:① The total weight gain of groups Ⅰ,Ⅱ and Ⅲ were 77.43,93.71 and 84.29 kg during the experimental period,respectively,and that of group Ⅱ was significant higher than group Ⅰ(P< 0.05).The average daily gains(ADG)were 0.86,1.04 and 0.94 kg/d,the ADG of group Ⅱ was 20.9%(P<0.05),10.6%(P>0.05)higher than that of groups Ⅰ and Ⅲ,and there was no significant between groups Ⅲ and Ⅰ(P>0.05).②At the ending of the experiment,the contents of UREA, TP,ALB,LDH and ALP of 3 groups were not significantly different(P> 0.05),but they all increased compared with those at the beginning.③The daily feeding cost was 13.440,14.000 and 14.685 yuan for each cattle of groups Ⅰ,Ⅱ and Ⅲ,and the cost of unit live weight gain was 15.63,13.46 and 15.68 yuan,respectively.T he above results suggested that the optimized con-centrates with 6.90 MJ/kg NEmf(group Ⅱ)obtained better effect on body gain and fattening benefits.关键词
和牛杂交牛/精料能量/育肥/生长性能/血浆生化指标Key words
Wagyu crossbreed cattle/concentrate's energy level/fattening/growth performance/plasma biochemical indices分类
农业科技引用本文复制引用
李义书,侯冠彧,刘诚,周雄,施力光,周汉林..不同能量水平精料对日本和牛与雷琼牛杂交牛生长性能和血浆生化指标的影响[J].中国畜牧兽医,2018,45(5):1219-1225,7.基金项目
中国热带农业科学院基本科研业务费专项资金(1630032016031、1630032016032、1630092018013) （1630032016031、1630032016032、1630092018013）
