The number of Bacteroides, Streptococcus bovis, Lactobacilli, Veillonella, Peptostreptococcus, Protozoa, the pH value and the concentration of lactate in the rumen fluid of eight goats that live on grass were determined after they were fed with corn.

• 用玉米饲喂平时吃草的8只山羊后,测定了其瘤胃内拟杆菌、牛链球菌、乳酸杆菌、韦荣氏球菌、原生动物的数量以及pH值和乳酸盐浓度。