1. Key
Laboratory of Agro-Ecological Processes in Subtropical
Region, Institute of Subtropical Agriculture, The Chinese Academy of Sciences; National Engineering
Laboratory for Pollution Control and Waste Utilization in Livestock
and Poultry Production; Hunan Provincial Engineering Research Center
for Healthy Livestock and Poultry Production; Scientific Observing
and Experimental Station of Animal Nutrition and Feed Science in South-Central,
Ministry of Agriculture, Changsha, Hunan 410125, P. R. China
2. Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Changsha, Hunan 410128, P. R. China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, P. R. China