State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China;
University of Liège, Gembloux Agro-Bio Tech, Precision Livestock and Nutrition, B-5030 Gembloux, Belgium;
State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China;
University of Liège, Gembloux Agro-Bio Tech, Precision Livestock and Nutrition, B-5030 Gembloux, Belgium;
State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China;
Beijing Key Laboratory for Dairy Cow Nutrition, Beijing University of Agriculture, Beijing 102206, P.R.China;