1 College of Resources and Environmental Sciences, State Key Laboratory of Nutrient Use and Management, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Key Laboratory of Low-carbon Green Agriculture, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China.
2 College of Resources and Environmental Sciences, State Key Laboratory of Nutrient Use and Management, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Key Laboratory of Low-carbon Green Agriculture, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, China. cuizl@cau.edu.cn.