1. Gansu Provincial Key Laboratory of Aridland Crop Science; Gansu Key Laboratory of Crop Genetics and Germplasm Enhancement; College of Life Science and TechnologyGansu Agricultural University Lanzhou 730070 PR China
2. Agriculture and Agri‐Food CanadaResearch and Development Centre Swift Current Saskatchewan S9H 3X2 Canada
3. Chair of Soil Science, TUM School of Life Sciences WeihenstephanTechnical University of Munich D‐85350 Freising‐Weihenstephan Germany
4. College of Grassland ScienceGansu Agricultural University Lanzhou 730070 PR China
5. College of Grassland, Resources and EnvironmentInner Mongolia Agricultural University Hohhot 010011 PR China
6. The UWA Institute of Agriculture and School of Agriculture and EnvironmentThe University of Western Australia Perth WA 6001 Western Australia Australia
7. State Key Laboratory of Grassland Agro‐ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; College of Pastoral Agriculture Science and TechnologyLanzhou University Lanzhou 730020 PR China