Ruminal fluid transplantation accelerates rumen microbial re-modeling and improves feed efficiency in yaks

A relatively stable microbial ecological balance system in the rumen plays an important role in rumen envi-ronment stability and ruminant health maintenance. No studies have reported how rumen fluid transplantation (RFT) affects the composition of rumen microorganisms and yak growth performance. In this experiment, we transplanted fresh rumen fluid adapted to house-feeding yaks to yaks transitioned from natural pastures to house-feeding periods to investigate the effects of rumen fluid transplantation on rumen microbial community regulation and production performance.