1. School of Ecology and Environment, Yuzhang Normal University, Nanchang 330103, China
2. School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou 341000, China
3. Development Research Center of the State Council, Beijing 100010, China
4. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China