Abstract:

Four varieties of ramie(Boehmeria nivea(L.)Gaud) were planted in farmland of Anhua and Zhuzhou ,which had been irrigated by Cd wastewater,yield and Cd concentrations in stem,bark and leaf of ramie were investgated.The results showed,yield of ramie that planted in Anhua and Zhuzhou was 2501, 2148 kg/hm2.a, respectively. Analyses of variance showed that Cd concentration in bark was significant higher than in stem and leaf. Concentration of Cd in ramie shoots of Anhua and Zhuzhou was 21.05,7.75 mg/kg,respectively,Cd concentration in shoots was obviously different in 4 varieties,and increased as the increasing Cd concentrations in the soil. Bioaccumulation factors of 4 ramie varieties were higher than 1.Zhongzhu No.1 had markedly higher aboveground biomass and Cd bioaccumulation than other ramie varieties.Therefore,the selection and breeding of varieties that had strong tolerance and accumulated higher levels of Cd are believed to bring great economical and environmental benefits.