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草业学报  2009 

丙酸镁对泌乳早期奶牛体况、泌乳性能和代谢参数的影响

, PP. 187-194

Keywords: 丙酸镁,泌乳性能,代谢产物,泌乳早期,荷斯坦奶牛

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Abstract:

选用36头经产奶牛,根据泌乳期、上一泌乳期305d产奶量和预产期,采用随机区组设计分为4组,对照组饲喂基础日粮,处理1,2和3组分别在基础日粮基础上添加丙酸镁50,100和150g/d,研究丙酸镁对泌乳早期奶牛采食量、泌乳性能、血液代谢参数和尿酮浓度的影响。结果表明,添加丙酸镁对奶牛的采食量、乳脂率、乳蛋白率、乳糖率和乳干物质率无显著影响,添加丙酸镁100和150g/d对产乳量、饲料转化效率、体况及代谢参数有改善,该二处理组产奶量、饲料转化效率、体况评分、能量平衡、血浆葡萄糖和胰岛素浓度均显著高于对照组(P<0.05),而血浆游离脂肪酸和β-羟丁酸浓度显著低于对照组(P<0.05),尿酮浓度(除100g/d组产后7d测定值与50g/d组无显著差异外)显著低于对照组和50g/d组(P<0.05)。根据试验结果,丙酸镁适宜添加量为100g/d。

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