HUA Dang-ling1,WEI Xiu-bin1,ZHENG Wen-ran2,CHEN Wei-qiang1,HUANG Ke-jiu2,ZHAO Dong-hai1,YANG Qiu-yun1(1.Engineering and Technology Research Center of Agricultural Resources and Environment,Henan Agricultural University,Zhengzhou 450002,2.Chongqing Tobacco Company,Wulong County Branch,Wulong 408500)
