Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Institute of ECO-Environment and Industrial Technology, Shanxi Agricultural University, Taiyuan, China;2. Department of Agronomy, Purdue University, West Lafayette, Indiana, USA;3. Key Laboratory of Agricultural Environment, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China;4. School of Integrative Plant Science, Cornell University, Ithaca, New York, USA;5. Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Institute of ECO-Environment and Industrial Technology, Shanxi Agricultural University, Taiyuan, China