1. State Key Laboratory of Animal Nutrition and Feeding, Ministry of Agriculture and Rural Affairs Feed Industry Centre, China Agricultural University, Beijing 100193, China
2. Beijing Biofeed Additives Key Laboratory, Beijing 100193, China
3. Chongqing Academy of Animal Science, Rongchang, Chongqing 402460, China
4. National Center of Technology Innovation for Pigs, Rongchang, Chongqing 402460, China