Four castrated Suffolk sheep fitted with rumen cannula,duodenum cannula and ileum cannula were used to determine the utilization rate of protein from rumen bacteria and protozoa in the small intestine with different dietary roughege/concentrate ratio.
英
美
- 用4只装有瘤胃瘘管、十二肠瘘管和回肠瘘管的去势(公母各半)萨福克羊体重平均为(45.；5±5
