Effects of Additive Sodium Bicarbonate on Milk Yield in Holstein Cow

12 Holstein cows with similar weight,fetal time,lactation length,fat rate and milk yield were selected.and were divided into 4 groups:randomly,each group incluede 3 cows control,treatment 1,treatment 2 and treatment 3.The mixed concentrated feed of the cows in Treatment groups were supplemented with different Sodium Bicarbonate levels at the dosage of 50g/d,100g/d,150g/d for each cow,each day respectively.The results showed that The milk yield of treatment groups and control groups tend to decrease than that of cow without be added sodium Bicarbonate,the milk yield tend to decreased,and group 1.group 2 and group 3 and control group declined by 1.95kg,1.47 kg,2.17kg and 3.73kg respectively,but fat rae increased by 3.82%,5.88%,5.00%,and 4%standard milk increased by 10.54%(P0.05),12.60%(P0.01),8.36%(P0.05) respectively.