复合酵母培养物对奶牛产奶性能、氮排放及血液生化指标的影响  

Milk production,nitrogen excretion and blood biochemical parameter responses to dietary addition of compound yeast cultures in dairy cows

作　　者：王玲[1] 吕永艳[1] 程志伟 杜高唐 李金林 付石军 孙国强[1] 

机构地区：[1]青岛农业大学动物科技学院,山东青岛266109 [2]山东滨州市滨城区畜牧兽医局,山东滨州256620 [3]山东滨州市畜牧兽医局,山东滨州256618 [4]山东滨州畜牧兽医研究院,山东滨州256618

出　　处：《草业学报》2015年第12期121-130,共10页Acta Prataculturae Sinica

基　　金：山东省现代农业产业技术体系牛产业创新团队(SDAIT-12-011-08)资助

摘　　要：为研究饲料中添加复合酵母培养物对奶牛产奶性能、氮排放及血液生化指标的影响,选取年龄、体重、产奶量及泌乳期相近(135±15)d的荷斯坦奶牛24头,随机分为4组,每个处理6个重复,对照组和3个试验组的复合酵母培养物添加量分别为精料浓度的0,0.8%,1.0%,1.2%,随精料饲喂,测定产奶量、乳成分、氮排放及血液生化指标,结果表明,1)试验2组日均产奶量显著高于对照组(P<0.05),各试验组分别比对照组提高8.48%,10.05%,8.97%。2)复合酵母培养物能显著提高乳脂和乳蛋白率(P<0.05),显著降低牛奶体细胞数(P<0.05),以试验2组最低。3)在氮排放量上,试验2组显著低于对照组(P<0.05),各试验组比对照组分别降低8.47%,12.01%,9.36%。4)在血液生化指标方面,复合酵母培养物能提高血清中总蛋白、球蛋白、血糖、胰岛素水平(P<0.05),降低尿素氮水平(P<0.05)。由此可见,本试验条件下,综合考虑产奶量、乳成分、氮排放及血液生化指标,复合酵母培养物的最佳添加量为精料浓度的1.0%。This experiment was conducted to determine the effects of compound yeast cultures on the milk pro-duction,nitrogen excretion and blood biochemical parameters of dairy cows.A total of 24 Holstein lactating cows with similar parity,weight,milk yield and lactation stage (135±15 day in milk)were equally assigned to four groups,including one control group and 3 treatment groups,with dietary supplementation of compound yeast cultures at concentrations of 0,0.8%,1.0% and 1.2%,respectively.Milk yield,milk composition,ni-trogen excretion and blood biochemical parameters of each cow were recorded.The results showed:1 )The cows in the respective treatment groups had 8.48%,10.05%,8.97% higher daily milk yield than cows in the control group (P <0.05).2)Compound yeast cultures significantly increased milk fat and protein concentra-tion (P <0.05),and reduced somatic cell counts (P <0.05),with treatment group 2 again the greatest re-sponse.3)The supply of compound yeast cultures in dairy cow feed concentrate reduced nitrogen excretion by 8.47%,12.01%,9.36% compared to the control group (P <0.05).4)Dietary supplementation with com-pound yeast cultures significantly increased the levels of glucose (GLU ),total protein (TP ),globulin (GLOB),and insulin (INS)(P <0.05 )in the serum,and reduced blood urea nitrogen (BUN)(P <0.05 ). Based on the data for milk yield,milk composition,nitrogen excretion and blood biochemical parameters,the optimal concentration of compound yeast cultures administered as a supplement for dairy cow diets is 1.0%.

关 键 词：复合酵母培养物 产奶性能 氮排放 血液生化指标 

分 类 号：S823.5[农业科学—畜牧学]