1. State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences , Beijing 100081 , China
2. Key Laboratory of Arable Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences , Beijing 100081 , China
3. School of Grassland Science, Beijing Forestry University , Beijing 100083 , China
4. Department of Biology and Graduate Degree Program in Ecology, Colorado State University , Fort Collins, CO 80523 , USA
5. Research Institute of Environment and Nature Conservation Technologies of the Ministry of Ecology, Environmental Protection, and Climate Change of the Republic of Uzbekistan , Tashkent 100043 , Uzbekistan
6. Institute of Microbiology of the Academy of Sciences , Tashkent 100128 , Uzbekistan
7. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences , Beijing 100081 , China