1. CAS Key Laboratory for Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China
2. University of Chinese Academy of Sciences, Beijing 101408, China
3. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot 010031, China