1. Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China
2. Bureau of Animal Husbandry and Veterinary Medicine, Mangshi 678499, China
3. Department of Agricultural Structure and Bioenvironmental Engineering, College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
4. Yunnan Provincial Key Laboratory of Animal Nutrition and Feed Science, Kunming 650201, China