波尔山羊×隆林杂交羔羊育肥期能量和蛋白质营养需要的研究

试验旨在研究育肥期波本杂肉羊能量和蛋白质营养需要量参数，筛选出一个最佳能量和蛋白质搭配的饲料配方,为科学饲养提供理论依据和生产指导。试验选择16只3月龄断奶波隆杂交F1代公羔，采用4×4拉丁方设计，以NRC（1981）营养需要推荐量为参考设计了低能低氮、高能低氮、低能高氮和高能高氮（NRC）4种能氮比日粮，分别为日粮1、2、3和日粮4。试验结果表明，舍饲波隆杂交羔羊育肥期对象草 玉米型日粮干物质采食量与代谢体重和日增重的关系为：DMI（g/d）=181.3W0.75－0.61ΔW－886.2（r=0.9287）；舍饲波隆杂羔羊育肥期粗蛋白质（CP）、总能（GE）、消化能（DE）需要量的估测模型分别为：CP（g/d）=19.56 W0.75＋0.25ΔW－128.6（r=0.7836），GE（MJ/d）=2.98 W0.75＋0.023ΔW－18.69（r=0.8257），DE（MJ/d）=1.26 W0.75－.006ΔW－3.56（r=0.6236）；3~6月龄舍饲育肥期波隆杂羔羊，日粮总能代谢率平均为0.49%,粗蛋白质的消化率平均为0.63%，每增重1 g体沉积蛋白质需要量为0.32 g。

The Studies on the Energy and Protein Requirements of Fattening Crossbred Boer Goats

Fattening period through research crossbred Boer goats of the wave energy and protein nutritional requirements parameters, screening of a better economic efficiency and the energy mix of protein feed supplements, with a view to keeping the scientific theoretical basis and provide production guidance. Sixteen fattening crossbred male Boer goats F1 weaned at the age of 3 month were used to study . A 4×4 Latin square experiment design was conducted to study the energy and protein requirements of stall feeding crossbred Boer goats fed the four different diets based on recommendation of nutrients requirements of NRC(1981).The results indicated that four different diets ration the relationship between DMI and average daily gain (ΔW,g/d) and metabolic weight (W0.75,kg) is:DMI (g/d)=181.3W0.75－.61ΔW－886.2（r=0.9287）.The prediction equations of nutritional requirements about gross energy (GE), digestible energy (DE) and crude protein (CP) for stall feeding growing crossbred Boer goats were:CP（g/d）=19.56 W0.75+0.25ΔW-128.6（r=0.7836），GE（MJ/d）=2.98 W0.75+0.023ΔW-18.69（r=0.8257），DE（MJ/d）=1.26 W0.75-0.006ΔW-3.56（r=0.6236）。For the stall feeding growing crossbred Boer goats, aged at 3 to 6 months, Metabolic rate of gross energy of the diets is 0.49; digestibility of crude protein is 0.63.The protein requirement of per live weight gain form eat goats is 0.32g PD/g gain (PD, protein deposited).