1. College of Grassland, Resources and Environment, Key Laboratory of Grassland Resources, Ministry of Education of China, and Key Laboratory of Forage Cultivation and Processing of Ministry of Agriculture of China, Key Laboratory of Grassland Management and Utilization of Inner Mongolia, Inner Mongolia Agricultural University Hohhot Inner Mongolia China
2. Institute of Grassland Science, and Key Laboratory of Vegetation Ecology, Ministry of Education of China, Northeast Normal University Changchun Jilin China