1. Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
2. Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan 430070, China
3. State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan 430070, China
4. The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China