gastrostogavage

Twenty-one Holsteins fitted with ruminal cannulas were divided into seven groups at randomly which were fed on TMR(control)and TMR added 50.

21头安装瘤胃瘘管的荷斯坦产奶牛随机分为对照组和试验Ⅰ~Ⅵ组,每组3头,对照组饲喂全混日粮(TMR),试验Ⅰ~Ⅵ组每天饲喂TMR加50。