1. College of Biological and Resource Environment, Beijing University of Agriculture , Changping , Beijing , 102206 , P.R. China
2. Center for Ecological Environment Monitoring and Scientific Research, Huaihe Valley Ecology and Environment Administration, Ministry of Ecology and Environment , Bengbu , Anhui , 233000 , P.R. China
3. Production Department , Chongqing Southwest No. 2 Pharmaceutical Factory Co., Ltd , Jiangjin , Chongqing , 402263 , P.R. China