1. College of Resources and Environmental Sciences Key Laboratory of Plant–Soil Interactions of MOE and Beijing Key Laboratory of Farmland Pollution Prevention and Remediation China Agricultural University Beijing 100193 China
2. Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu Sichuan 610041 China
3. Sustainable Agricultural Sciences Department Rothamsted Research Harpenden Hertfordshire AL5 2JQ United Kingdom