1. College of Resources and Environmental Sciences; National Academy of Agriculture Green Development; Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China
2. Interdisciplinary Research Centre for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing 400715, China
3. School of Natural Sciences, Bangor University, Bangor, Gwynedd, LL57 2UW, U.K.