Change characteristics of soil available nitrogen and phosphorus and heavy metal contents after long-term cultivation of vegetables.
QUAN Zhi1,2,3, WU Jin-shui1, WEI Wen-xue1, QIN Hong-ling1, ZHU Yi-jun1, LIU Xin-liang1,4, SHU Rong-bo4, LI Ming-de5
1Key Laboratory of Agroecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;2State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China; 3Graduate University of Chinese Academy of Sciences, Beijing 100049, China;4College of Resource and Environment, Hunan Agricultural University, Changsha 410128, China; 5Institute of Soil and Fertilizer, Hunan Academy of Agricultural Sciences, Changsha 410125, China