Protein supply of grazing dairy cows supplemented with concentrates compared to dairy cows fe< total mixed ration

摘要

Microbial efficiency is a result of availability of nitrogen and degradability of carbohydrates in the feedstuffs. Due to an unfavourable relationship of nitrogen (excess) to energy (limited) for rumen microbes on full pasture, efficiency of ruminal mCP synthesis is diminished. Therefore, the objective of the present study was to investigate the effect of a concentrate supplementation during grazing on efficiency of mCP synthesis in dairy cows.