Dynamics of methanogenesis, ruminal fermentation and fiber digestibility in ruminants following elimination of protozoa: a meta-analysis

摘要: Ruminal microbes are vital to the conversion of lignocellulose-rich plant materials into nutrients for ruminants. Although protozoa play a key role in linking ruminal microbial networks, contribution rumen fermentation remains controversial; therefore, this meta-analysis was conducted quantitatively summarize temporal dynamics methanogenesis, volatile fatty acid (VFA) profiles and dietary fiber digestibility ruminants following elimination (also termed defaunation). A total 49 studies from 22 publications were evaluated. The results revealed that defaunation reduced methane production shifted VFA consist more propionate less acetate butyrate, but with concentration decreased digestibility. However, these effects diminished linearly, at different rates, time during first few weeks after defaunation, eventually reached relative stability. ratio increased 7 11 wk respectively. Elimination initially toward methane, over time.