日粮中添加保护氯化胆碱对奶牛泌乳性能的初步研究

Effect of Adding Rumen -Protected Choline on Milk Performance in Lactating Dairy Cows

在泌乳奶牛日粮中添加25克/日·头的保护氯化胆碱进行饲养对比试验。选取44头健康的荷斯坦泌乳奶牛,分别在杭州的近江和正兴两奶牛场进行。结果表明:近江添加组平均日泌乳量比对照组提高0.92kg,正兴添加组平均提高0.82kg;乳蛋白和乳脂率基本一致。

Forty-four lactating dairy cows were used to investigate the effect of addition with rumen-protected choline (25g/d) on lactation performance in dairy cows. The experiments were conducted in two dairy farms (Jinjiang Farm and Zhengxing Farm), involving 22 lactating cows in each. The animals added with rumen-protected choline produced 0.92kg and 0.82kg more milk than that of the control group in Jinjiang Farm and Zhengxing Farm respectively. There is little difference in contents of milk fat and milk protein.