1. Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of Ministry of Agriculture and Rural Affairs, Inner Mongolia Agricultural University, Hohhot 010019, China
2. Key Laboratory of Grassland Resources, Ministry of Education, Inner Mongolia Agricultural University, Hohhot 010019, China
3. Department of Grass Science, Inner Mongolia Agricultural University, College of Grassland, Resources and Environment, South Campus, Hohhot 010019, China
4. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot 010031, China