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1Key Laboratory of Plant Nutrition and Nutrient Cycling of Ministry of Agriculture, China; Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 2Qiyang Agroecosystem of National Field Experimental Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences,Qiyang 426182, China; 3Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing 100081, China; *Corresponding author, E-mail: dch200707@yahoo.com.cn |
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