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精料补充料能量水平对早期断奶犊牦牛生产性能和营养物质表观消化率的影响

DOI: 10.3969/j.issn.1006-267x.2013.09.014

Keywords: 能量水平,犊牦牛,生产性能,血清生化指标,表观消化率

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Abstract:

本试验旨在研究精料补充料能量水平对早期断奶犊牦牛生产性能、血清生化指标和营养物质表观消化率的影响。选取体况良好、平均体重为(56.27±4.70)kg的3月龄犊牦牛18头,随机分为3组,每组3个重复,每个重复2头牛。饲喂粗蛋白质水平为17.00%,增重净能分别为5.60、6.50、7.40MJ/kg的3种精料补充料。试验共39d,其中预试期7d,饲养试验28d,消化试验4d。结果表明:1)6.50、7.40MJ/kg组犊牦牛平均日增重显著高于5.60MJ/kg组(P<0.05);5.60MJ/kg组精料补充料/增重显著高于其他2组(P<0.05)。2)6.50MJ/kg组犊牦牛血清葡萄糖、甘油三酯含量显著高于5.60MJ/kg组(P<0.05),与7.40MJ/kg组差异不显著(P>0.05)。3)6.50MJ/kg组犊牦牛干物质、有机物、总能表观消化率显著高于5.60MJ/kg组(P<0.05)。随能量水平升高,钙(P=0.06)、磷(P=0.10)表观消化率有降低的趋势。综上所述,牦牛可在3月龄断奶舍饲饲养,精料补充料增重净能为6.50MJ/kg时,更有利于舍饲的3月龄断奶犊牦牛的营养物质消化,促进生长。

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