关键词: 杂交羔羊; 能量; 蛋白质; 营养需要; 采食量

Abstract: 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).

Key words: crossbred Boer goats; energy; protein; nutritional requirements; intake