1. Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences Zhejiang Univ. Hangzhou310058
2. China and Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, College of Environmental and Resource Sciences Zhejiang Univ. Hangzhou310058China
3. Guizhou Institute of Soil and Fertilizer Guiyang550006China