中文摘要：

为研究夏南牛能量需要及制定饲养标准,充分发挥其生产性能,指导其生产,提高养殖效益.本研究选择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],采用完全随机试验设计,分为5个处理,每个处理6头牛,采用饲养试验和消化代谢试验,测定了夏南牛能量采食量、粪、尿能排泄量.结果表明：11 ～12月龄夏南牛维持消化能（DEm）和代谢能（MEm）需要量分别为0.517 MJ/kg矿75、0.402 MJ/kgW0.75,每增加1 kg消化能（DEg）和代谢能（MEg）需要量分别为40.17 MJ/kg、36.02 MJ/kg.

英文摘要：

The purpose of this study is to make feeding standard, guide production of Xianan cattle, give full play to the performance trait and improve breeding efficiency. 11 to 12 -month -old Xianan cattle with similar body weight （275.57 ± 8.99） kg were assigned randomly into 5 groups each with 6 replicates. Feeding trial ,digestion and metabolism experiment were conducted in order to measure the amount of energy intake, manure and urine energy excretion in Xianan cattle. The results showed that：the maintenance digestible energy and apparent metabolizable energy of Xianan cattle were 0.517 MJ/kg W0. 75 and 0. 402 MJ/kg W0.75 ,respectively. The digestible energy of 40. 17 MJ/d and metabolizable energy of 36.02 MJ/d were needed for every 1 kg of weight increasing.