1. College of Animal Science and Technology, Chongqing Key Laboratory of Forage and Herbivore, Chongqing Engineering Research Centre for Herbivores Resource Protection and Utilization, Southwest University, Chongqing, China
2. Chongqing Agriculture and Rural Affairs Committee of Tongnan, Chongqing, China
3. Dazhou Animal Husbandry Technology Extension Station, Dazhou, China