11～12月龄夏南牛蛋白质需要量研究  

The Requirements of Protein for 11 to 12-month-old Xianan Cattle

作　　者：刘道杨[1] 付戴波[1] 瞿明仁[1] 祁兴磊 赵连甫 祁兴运 

机构地区：[1]江西农业大学江西省动物营养重点实验室,江西南昌330045 [2]河南省泌阳县夏南牛科技开发有限公司,河南泌阳463700 [3]河南省泌阳县畜牧局,河南泌阳463700 [4]河南省泌阳县动物卫生监督所,河南泌阳463700

出　　处：《江西农业大学学报》2013年第5期1019-1023,共5页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家公益性行业(农业)科研专项(30960254);国家现代农业产业技术体系项目(CARS-38)

摘　　要：为探讨夏南牛蛋白质需要量及修订饲养标准,选择30头体况良好、体质量相近(275.57±8.99)kg的11～12月龄夏南牛公牛,按完全随机试验设计,将试验牛分为5个处理,每个处理6头牛,采用饲养试验和氮平衡试验,测定了夏南牛日增重、粗蛋白采食量、粪氮排泄量与尿氮排泄量。结果表明:在本试验条件下,夏南牛单位代谢体质量维持粗蛋白(CP m)需要量为5.40 g/(kg·d),每千克增重的粗蛋白(CP g)需要量为359.35 g/kg;可消化粗蛋白维持需要量为2.79 g/(kg·d),每千克增重的可消化蛋白需要量(DCP g)为260.69 g/kg。夏南牛以代谢体质量(W0.75)与平均日增重(ADG)为预测因子的粗蛋白、可消化蛋白需要量预测模型分别为:CP=5.40×W0.75+359.35×ADG,(R2=0.997)DCP=2.79×W0.75+260.69×ADG,(R2=0.998)The purpose of this study is to make feeding standard and to estimate the protein requirement of Xianan cattle.11 to 12-month-old Xianan cattles with similar body weight （275.57 ± 8.99） kg were assigned randomly into 5 groups each with 6 replicates.Feeding trial and nitrogen balance experiment were conducted to measure the amount of daily gain,crude protein intake,fecal and urinary N excretion in Xianan cattle.The results showed that：the crude protein and digestible crude protein requirements for maintenance of Xianan cattle were 5.40 g/kg and 2.79 g/kg.The crude protein and digestible crude protein requirements needed for gain were 359.35 g/kg and 260.69 g/kg respectively for per kilogram of weight increase.The models of predicting crude protein or digestible crude protein requirements of Xianan cattle with W0.75 and ADG were as follows：CP =5.40 × W0.75 ＋ 359.35 × ADG,（R2 =0.997）DCP =2.79 × W0.75 ＋ 260.69 × ADG,（R2 =0.998）

关 键 词：夏南牛 粗蛋白质 可消化粗蛋白质 需要量 

分 类 号：S823.815[农业科学—畜牧学]