不同能量蛋白比日粮对肉牛育肥效果的影响  

Effects of Different Energy-protein Ratioes on Fattening Performance of Beef Cattle

作　　者：杨玉能[1] 夏先林[2] 

机构地区：[1]遵义职业技术学院,贵州遵义563006 [2]贵州大学动物科学学院,贵阳550025

出　　处：《中国草食动物科学》2015年第4期43-46,共4页China Herbivore Science

基　　金：贵州省"十一五"农业科技攻关重大项目[黔科合NZ字(2005)3002]

摘　　要：为了研究不同能量蛋白比日粮对肉牛育肥效果的影响,试验选择43头1.5岁左右、体重230.24 kg±44.16 kg的杂交牛随机分为3组,喂给由不同比例的精料补充料、酒糟生物料、黑麦草组成的不同能量、蛋白质含量的日粮,经过90 d的肥育饲养试验,3组牛的摄入能量蛋白质比分别为21.57、24.97和27.11。结果表明:能量蛋白质比为24.97的试验Ⅱ组的肉牛日增重分别比试验Ⅰ、Ⅲ组高14.53%(P<0.05)和3.88%(P>0.05);饲料干物质报酬分别比试验Ⅰ、Ⅲ组高15.61%(P<0.01)和1.93%(P>0.05);综合净能转化效率比试验Ⅰ、Ⅲ组分别高3.87%(P>0.05)和8.62%(P>0.05);蛋白质效率以试验Ⅱ组最高,分别比试验Ⅰ、Ⅲ组高21.35%(P<0.01)和0.93%(P>0.05)。In order to study the effecs of different energy-protein ratioes on fattening performance of beef cattle,forty three 1.5-year-old crossbred beef cattles,weight 230.24 kg ＋ 44.16 kg （P〉0.05）were selected and divided into 3 groups according to completely randomized experimental design. The cattle were supplied with different diets for 90 d.the energy-protein ratioes in the 3 groups were 21.57,24.97 and 27.11 respectively.The results were as the following：the ADG of treatment Ⅰ , Ⅱ , and Ⅲ were 1 170,1 340, and 1 290 g/d respectively, the ADG of treatment Ⅱ was higher than those of treatment Ⅰ and treatment Ⅲ by 14.53 % （P〈0.05）and 3.88 % （P〉0.05）respectively; the DM/ADG of the three treatments were 7.24,6.11 and 6.23 kg, that in the treatment Ⅱ was lower than those in the treatment Ⅰ and Ⅲ by 15.61% （P〈0.01 ） and 1.93 % （P〉0.05） respectively; the NEmf efficiencies of the 3 treatments were 24.82, 23.86 and 26.11 MJ/kg respectively;the NEmf efficiecy in the treatment Ⅱ was higher than those in treatment Ⅰ and Ⅲ by 3.87 % （P〉0.05）and 8.62 % （P〉0.05）respectively; PER of the 3 treatments were 0.89, 1.08, and 1.07, and the PER in treatment Ⅱ was higher than those in treatment Ⅰ and Ⅲ by 21.35 % （P〈0.01） and 0.93 % （P〉0.05）respectively.

关 键 词：能量蛋白比 肉牛 育肥效果 

分 类 号：S823.5[农业科学—畜牧学]