Background:Due to the high prevalence and complex etiology, bovine mastitis (BM) is one of the most important diseases t......

选用32头经产奶牛，根据泌乳期、上个泌乳期305d产奶量和预产期，采用随机区组设计分为4组，对照组饲喂基础日粮，处理1、2、3组分别在基础......