摘要
Abstract
Soil heavy metal pollution has not only restrict the sustainable development of economy and society,but also bring severe risk to human health.There is importantly significance to learn the accumulation of crops' edible part and the effect on crop' s yields.In thesis,heavy metals (Cr,Pb,Cd,As and Hg) concentrations in carrots and according soil (latosol) were investigated in a field experiment to explore their accumulation in carrots' edible parts and effect on yields,which can provide scientific evidences for soil pollution abatement.The main results of the study are shown below.Under different metal-specific treatments,the bioconcentration capacity of carrot to five metals followed in orders:Cd ＞ Hg ＞ Cr ＞ As ＞ Pb.Heavy metal concentrations in carrot edible part increased with the raising of feed metal,respectively.After harvest,available-metal and total metal concentrations in carrot soil increased with the addition of heavy metal level,respectively.In general,reduced amplitude of the carrot yields followed the orders:Cr ＞ Pb ＞ Cd ＞ As ＞ Hg.As,Pb and Cr treatments have no significant influence on the carrot yields.In the C1 level Hg treatment,compared with the control,the carrot yields increased by 7.8％.While in the C1 and C2 level Cd treatments,the pakchoi yields were reduced by 5.2％ and 15.7％,respectively.关键词
重金属/胡萝卜/累积/产量Key words
Heavy metal/ Carrot/ Accumulation/ Yield分类
农业科技
