关键词: 植物修复, 植物修复, 黑麦草, 河道疏浚底泥, 重金属-有机污染物, EDTA, DTPA, 柠檬酸

Abstract: Abstract: The effect of different concentrations Cu2+ on the growth and physiological characteristics for C. communis were studied by pot experiments in this article. Cu2+ concentration used for the experiments was 20,50,100,200,400mg/L, respectively, and the deionized water was control group.The results showed that C.communis watered by 5 different concentrations Cu2+ solution could grow normally. Comparing with the control group, C. communis grew quickly in the early period, but slowed down in the later period. With the increasing of Cu2+ concentration, the average height was increasing in the higher concentration. After various concentrations of Cu2+ treatment, SOD enzyme activities and proline contents of C. communis leaves were promoted gradually. Variance anlysis results showed that there were no significant difference among all treatments groups for SOD enzyme activities and proline contents. But the biomass of the upground and underground parts decreased with the increasing of Cu2+ concentration. This results indicated C.communis presented strong resistance to Cu2+ stress, which resisted heavy metal Cu2+ toxicity action through promoting the proline contents and SOD enzyme activities and the physiological response in the body