中国畜牧杂志2017，Vol.53Issue(10)：89-95,7.DOI:10.19556/j.0258-7033.2017-10-089
活性干酵母对荷斯坦泌乳牛生产性能、瘤胃发酵及营养物质表观消化率的影响
Effects of Active Dry Yeast on Production Performance, Ruminal Fermentation and Nutrient Apparent Digestibility of Lactating Holstein Dairy Cow
摘要
Abstract
The experiment was conducted to investigate the effects of dietary supplementation of different active dry yeast(Saccharomyces cerevisiae)levels on production performance,nutrient digestibility,serum indices and ruminal fermentation of lactating dairy cows.A total of Forty-five healthy Chinese Holstein lactating dairy cows were randomly assigned into 3 groups with 15 cows in each group based on the similar weight,parity,milk yield,lactation days and the content of milk,namely the control group Ⅰ0 without ADY supplementation,trial group Ⅱ2 with 2 g/d and trial group Ⅲ5 with 5 g/d respectively,All diets were provided as TMR.The feeding trail period was 60 d,the pre-experimental period was 1 week.The results showed as fellows:compared with the control group Ⅰ0,the dry matter intake,milk yield,4％ fat correction milk production in trial group Y5 increased 1.23 kg/d,0.99 kg/d,1.92 kg/d and 7.2％ respectively (P＜0.05);Compared with group Ⅰ0,group Ⅲ5 could significantly increase DMI,milk yield,4％ fat correction milk production and milk fat yield 1.23kg,0.99kg,1.92％ and 7.2％ respectively(P＜0.05);while others milk composition between each treatment group had no significant difference(P＞0.05);There was no remarkable effects of feeding active dry yeast on rumen total VFA,acetate and butyrate concentration(P＞0.05);compared with control group,the content of propionate in rumen fluid of trial group Ⅲ5 significantly increased (P＜0.05),while the ration of acetate and propionate decreased (P＜0.05);Active dry yeast had the potential to improve the apparent digestibility of DM (P=0.20),CP (P=0.17),NDF (P=0.40) and ADF (P=0.25).In conclusion,0.025％ active dry yeast can be used for dairy cows to promote the propionate fermentation in the rumen,decrease the ration of acetate and propionate,improve the energy utilize efficiency,DMI,milk performance and fat yield of lactating Holstein dairy cow,which has an economic benefit.关键词
荷斯坦泌乳牛/活性干酵母/生产性能/瘤胃发酵/营养物质表观消化率Key words
Lactating Holstein dairy cow/Active dry yeast/Production performance/Ruminal fermentation/Nutrients apparent digestibility分类
农业科技引用本文复制引用
林静,赵鑫源,康坤,都文,曹志军,王雅晶,胡骏鹏,余雄,李胜利..活性干酵母对荷斯坦泌乳牛生产性能、瘤胃发酵及营养物质表观消化率的影响[J].中国畜牧杂志,2017,53(10):89-95,7.基金项目
现代农业(奶牛)产业技术体系建设专项资金(CARS-37) （奶牛）
