College of Resources and Environment;
Hunan Agricultural University;
Changsha 410128;
China;
Research Center for Eco-Environmental Sciences;
Chinese Academy of Sciences;
Beijing 100085;
China;
Key Laboratory for Agro-Ecological Processes in Subtropical Region;
Institute of Subtropical Agriculture;
Chinese Academy of Sciences;
Changsha 410125;
China;
availability; cadmium; controlled-release; N; fertilizer; copper; lead; solubility; zinc;