关键词: 玉米, 玉米, 发育期, 气象因子, 产量, 相关分析

Abstract: In order to select ecological restoration plants for heavy metal contaminated soil ecological restoration, sampling test analysis was conducted on Ligustrum lucidum growing in Sb, As, Cd, Hg seriously contaminated soil in Lengshuijiang. It turned out that Ligustrum lucidum had strong resistance to serious heavy metal stress, and the growth and biomass had not been seriously affected, and the DBH, tree height and biomass decreased 2.58%, 6.07% and 7.58%, respectively. Each heavy metal enrichment coefficient of Ligustrum lucidum was more than 2, in which, enrichment coefficients of Hg and Cd were the maximum, while that of Cu and As were the minimum. The heavy metal transfer coefficient was more than 60, in which, that of Sb was the maximum, while that of Zn was the minimum. The enrichment of heavy metals was significantly different in roots, stems and leaves of Ligustrum lucidum. The order of heavy metals enrichment in the leaves was Zn > Sb > As > Pb > Cu > Cd > Hg, in the stem was Zn > Sb > Pb > Cd > As > Cu > Hg, while in the root was Zn > Sb > Pb > As > Cu > Cd > Hg, the order of heavy metals enrichment in the leaves, stems and roots was leaves > stems > roots, and at least 93% of the heavy metals were enriched in the upper organs, and at least 60% of the heavy metals were enriched in the leaves. Ligustrum lucidum was verified to be an excellent species of heavy metal contaminated soil ecosystem restoration.