YANG Hai-yu,LU Wuan,XUE Jie,ZHANG Le-ying,ZHANG Ru-mei,LI Rong-ling,LI Jian-bin,ZHONG Ji-feng(Dairy Research Center,Shandong Academy of Agricultural Sciences,Ji′nan 250131,China,Hebei University of Engineering,Handan 056001,China)
Research Progress on Main Influencing Factors of Urea Nitrogen in Milk of Dairy Cows
ZHANG Yong-hui, FAN Zhen, ZHANG Wan-xiang, ZHU Guang-long(Grassland Technology Extension Station of Gansu Province, Lanzhou , China, Branch Company of Bio-additives, Xinjiang Tiankang Feed Technology Co., Ltd., Urumqi , China, Joint International Research Laboratory of Agriculture and Agri-product Safety of the Ministry of Education, Ministry of Education of China, Yangzhou , China, Yangzhou University, Yangzhou , China)
Effect of Fermented-wet Feed on Milk Yield and Nutrient Digestibility of Holstein Cows