中国畜牧兽医2016，Vol.43Issue(11)：2931-2938,8.DOI:10.16431/j.cnki.1671-7236.2016.11.018
活性干酵母与酵母培养物对体外瘤胃发酵参数影响的比较
Comparison of the Effects of Active Dry Yeast and Yeast Culture on Rumen Fermentation Parameters
摘要
Abstract
This study was conducted to compare the effect of active dry yeast (ADY)and yeast culture (YC) on gas production,dynamics of gas production,methane content and rumen fermentation parameters by in vitro gas production technique,and the values of ME,OMD and yield of MP were also predicted according to 24 h gas production,in order to further reveal the mechanism of the difference effect and lay a foundation for those reasonable application.The results showed that ADY and YC had similiar effect on gas production, however,the gas production of YC group at 12,24 and 48 h were higher than that of ADY;Compared to CON group,the rate of gas production in earlier fermentation period was increased by 19.4% in YC group and decreased by 15.3% in ADY group (P>0.05),and that of YC group was significantly increased by 41.0% than that of ADY group (P<0.05);The content of CH4 of YC group was significantly increased and content of H2 and CO2 were significantly decreased (P<0.05).The content of H2 in ADY group was significantly decreased (P<0.05),while the content of CH4 and CO2 were not significantly changed (P>0.05);The pH and total VFA of rumen fermentation fluid in ADY and YC groups were not significantly changed (P>0.05),while the concentration of NH3-N of the two groups was significantly increased (P<0.05).ADY had no significant effect on individual VFA (P>0.05),whereas YC tended to increase the ratio of acetic acid and decrease the ratio of isobutyric acid;Comparing to CON group,the OMD,ME and MP of ADY and YC groups were not significantly affected (P>0.05), while that of YC group were all significantly increased than ADY group (P<0.05).In conclusion,there were certain differences in the effect of ADY and YC on gas production,concentrate of gas,the rate of gas production and parameter of rumen fermentation.关键词
酵母制剂/体外产气技术/产气量/瘤胃发酵Key words
yeast preparation/in vitro gas production technique/gas production/rumen fermentation分类
农业科技引用本文复制引用
耿春银,赵丽萍,何立文,周振明,孟庆翔..活性干酵母与酵母培养物对体外瘤胃发酵参数影响的比较[J].中国畜牧兽医,2016,43(11):2931-2938,8.基金项目
国家肉牛牦牛产业技术体系项目(CARS-38) （CARS-38）
国家自然科学基金项目(31660669) （31660669）
