文献类型： 外文期刊
作者：
Jin, Di
1
;
Zhao, Shengguo
1
;
Zheng, Nan
1
;
Beckers, Yves
2
;
Wang, Jiaqi
1
;
作者机构： 1.Chinese Acad Agr Sci, Inst Anim Sci, State Key Lab Anim Nutr, Beijing 100193, Peoples R China
2.Univ Liege, Gembloux Agrobio Tech, Precis Livestock & Nutr Unit, Passage Deportes 2, B-5030 Gembloux, Belgium
3.Chinese Acad Agr Sci, Inst Anim Sci, Minist Agr, Milk Risk Assessment Lab, Beijing 100193, Peoples R China
关键词： rumen; urea utilization; ureolytic bacteria; urease; regulation
期刊名称：ANNALS OF ANIMAL SCIENCE （ 影响因子：2.09； 五年影响因子：2.103 ）
ISSN： 2300-8733
年卷期： 2018 年 18 卷 2 期
页码：
收录情况： SCI
摘要： Urea is used as non-protein nitrogen in the rations of ruminants as an economical replacement for feed proteins. Urea transferred from the blood to the rumen is also an important source of nitrogen for rumen microbial growth. It is rapidly hydrolyzed by rumen bacterial urease to ammonia (NH3) and the NH3 is utilized for the synthesis of microbial proteins required to satisfy the protein requirements of ruminants. Urea has commonly become an accepted ingredient in the diets of ruminants. In recent decades, urea utilization in ruminants has been investigated by using traditional research methods. Recently, molecular biotechnologies have also been applied to analyze urea-degrading bacteria or urea nitrogen metabolism in ruminants. Combining traditional and molecular approaches, we can retrieve better information and understanding related to the mechanisms of urea metabolism in ruminants. This review focuses on urea utilization in ruminants and its regulation by rumen bacterial urease in the host. The accumulated research provides foundations for proposing further new strategies to improve the efficiency of urea utilization in ruminants.
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