Study of the different concentrations of lead,zinc to eco-toxic effects of maize growth

Pot experiment was conducted to study the effects of different concentrations of lead,zinc to eco-toxic effects of maize growth.The results show that: the concentration of lead lower than 250mg/kg promoted the corn germination,higher than this concentration inhibited germination,all the zinc processing heighten corn germination rate,low concentrations of zinc can improve seed germination potential,high concentrations inhibited;when lead concentration at 125 mg / kg,it impacts for foliar chlorophyll,bud,root,plant height,fresh and dry weight,the lead dosage the more,the inhibition the increaser;chlorophyll content,bud,root,plant height,fresh and dry weight of the zinc processing,the role of promoting gradually increases with the amount of the increase,then gradually weakened until inhibition;the order of the accumulation of lead in various organs: root straw leaf seed,the order of the accumulation of zinc in various organs: leaf seed root straw;with the increased usage of lead,the soil different forms of lead content trend significantly increases,but also changed the morphological distribution of lead in the soil,the proportion of non-residual fraction content increased.With the increasing amount of exogenous zinc inputs,change the proportion of morphological distribution of zinc in the soil,Mineral-Zn,CAB-zn in the proportion of crystalline iron oxide bound,COFe-Zn,AOFe-Zn,Omn-Zn gradually increase the proportion,EX-Zn and OM-Zn of content proportion undisturbed soil or outside source contaminated soil is very low,less than 0.1%.