饲喂百奥美速酵源对荷斯坦乳牛产奶量及乳品质的影响

Effects of yeast(Saccharomyces cerevisiae) on Milk Production and Composition in Holstein Dairy Cows

饲喂百奥美速酵源试验组头日产奶量比对照组增２．０１千克，提高７．１％，差异显著（Ｐ＜０．０５）；试验组乳脂率和乳干物质率显著高于对照组（Ｐ＜０．０５），试验组乳脂量、乳干物质量极显著高于对照组（Ｐ＜０．０１）；经济效益分析表明投入产出比为１：４。

Supplementation with yeast (Sc) increased milk production by 2.0kg/d.enhanced by 7.l% (P <0.05), Addition of yeast to the diet increased the percentages of milk Fat and milk for matter(p<0.05), no differences were significant for milk lactose and milbalk protein percentages(p> 0. 05), Daily milk fat (P<0.01) 、milk protein(p<0.05)、milk lactose(p<0.05)、milk dry matter(p<0.01) were increased by dietary yeast. The ratio of input to output was l:4 by economic benefit analysis.