1. College of Grassland, Resources and Environment, Key Lab. of Grassland Resources of the Ministry of Education of China, Key Lab. of Forage Cultivation, Processing and High Efficient Utilization of the Ministry of Agriculture of China Inner Mongolia Agricultural Univ. No. 29 Erdos Street Hohhot Inner Mongolia 010011 China
2. Swift Current Research and Development Centre Agriculture and Agri‐Food Canada 1 Airport Rd, Box 1030 Swift Current Saskatchewan S9H 3X2 Canada
3. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences Beijing 100081 People's Republic of China
4. HW Eco Research Group Surrey British Columbia V4N 9E9 Canada
5. Key Lab of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS Beijing 100101 China
6. College of Science Inner Mongolia Agricultural Univ. Hohhot Inner Mongolia 010019 People's Republic of China