日粮中添加酵母或酵母培养物对奶牛生产性能的影响

Abstract

Abstract: The aim of the current study was to examine the effects of a supplemental yeast or yeast culture (YC) on milk production of dairy cow. Lactating dairy cows (n=7 groups,each containing 10 cows) were randomly assigned to 1 of 7 diets containing 60 g/d of YC-Ⅰ,50 g/d of YC-Ⅱ,10 g/d of YC-Ⅲ,10 g/d of YC-Ⅳ,15 g/d of YC-Ⅴ,15 g/d of YC-Ⅵ. Treatments were diets either supplemented with yeast cultures or not supplemented with YC (control). Cows were fed and milked twice daily. The basal diets include 20 kg corn silage,3 kg Chinese wildrye,2 kg alfalfa hay and 9 kg complete formula feed for dairy cow. The results showed that cows supplemented with YC-Ⅱ had a higher milk yield than those not fed yeast culture (P<0.05); milk fat was higher in YC-Ⅰ,YC-Ⅱ and YC-Ⅲ than in Ctrl (P<0.05); milk protein was higher in YC-Ⅳ than in cnotrol group; There was no effect of dietary treatment on milk solid; somatic cell count in YC-Ⅱ,YC-Ⅲ and YC-Ⅳ were decreased,but there was no significant difference(P>0.05). Therefore,the results indicated that supplement of yeast or yeast culture can positively affect milk production of dairy cow.

Key words: yeast culture; milk yield; milk composition; somatic cell count

CLC Number:

S816.79

WANG Dian;WANG Jia-qi;SONG Li-hua. Effect of a Supplemental Yeast or Yeast Culture on Milk Production of Dairy Cow[J]. , 2012, 39(5): 82-85.

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Effect of a Supplemental Yeast or Yeast Culture on Milk Production of Dairy Cow

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