会议专题

Influencing factors of anti-methanogenic effects of defaunation, Insights from a meta-analysis

Introduction The effects of protozoa on the rumen fermentation have been extensively investigated during last 50 years and demonstrated that defaunation greatly altered enteric methane emissionsand volatile fatty acid (VFA) pattern.However, those alternations have been equivocal, even opposite.The reasons for these dissimilar results among studies are not well known.The nutrient composition of experimental diets, methods of defaunation, faunated state and duration of defaunation may be able to explain most of the between-study variability in the defaunation effect (Bird et al., 2008;Hegarty et al., 2008;Santra et al., 2007;Zhou et al., 2011).However, the relationships between these potential explanatory variable and effects of defaunation on methane production arehard to study experimentally, due to difficulties of cultivating protozoa in vitro and defaunating animals for long time(Eugène et al., 2004).Fortunately,Meta-analysis can be used combining and exploring between-study variability of the treatment effects,moreover, outcomes from a meta-analysis increasethe precision of estimate for treatment effects contributing to the pooled analysis (Lean et al., 2009).A meta-analysis was therefore conducted to explore the potential sources of heterogeneityamong studies and quantitatively summarize the responses of defaunation on enteric methane emissionsand VFA pattern.

Z.J.Li Q.Deng S.M.Liu T.Yan Y.C.Cao F.Li J.Y.Zao

College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China School of Animal Biology, The University of Western Australia, Crawley, WA 6009, Australia College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China;

国际会议

The 5h International Symposium on Dairy Cow Nutrition and Milk Quality(第五届“奶牛营养与牛奶质量国际研讨会)

北京

英文

194-197

2017-05-05(万方平台首次上网日期,不代表论文的发表时间)