11~12月龄夏南牛能量代谢规律与需要量研究
Acta Agriculturae Universitatis Jiangxiensis(2013)
Abstract
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 W0.75、0.402 MJ/kg W0.75,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。
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Key words
requirement,Xianan cattle,digestive energy,metabolizable energy
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