日粮中添加碳酸氢钠对奶牛生产性能的影响

The Effect of Dietary Sodium Bicarbonate on the Performance of Milch Cows

通过对奶牛添加碳酸氢钠的研究结果表明：按混合精料量的1．5％添加，对高精料型日粮的泌乳牛可增加其瘤胃中挥发性脂肪酸的含量，并使产奶量提高3．13％，乳脂率增高0．07％，从而增加乳牛业的经济效益。同时，试验测定了西昌市区黑白花奶牛瘤胃挥发性脂肪酸的含量及其组成百分率，为今后研究奶牛的消化生理提供依据。

The result of the experiment showed an increase in volatile fatty acids in the rumen， and 3．13％ more milk production， 0．07％ more milk－fat and increase economy benefit of dairy farming when sodium bicarbonate was append at a rate of 1．4％ of the mixed concentrates to the high－concentrate ration for milch cows． The determination of the content of volatile fatty acids in the rumen of Holsteins in Xichang city provided reliable data basis for the future research on the digestive physiology of milch cows．