镍污染对小麦幼苗矿质营养元素吸收与累积的影响研究

Efects of Ni pollution on the absorption and accumulation of mineral nutritious elements in wheat seedling

摘要: 试验研究Ni胁迫对小麦幼苗茎叶中Cu、Zn、Fe、Mn、Ca和Mg营养元素吸收及累积的影响结果表明，Ni胁迫下随土壤施Ni量的增加而小麦幼苗生长受抑，生物产量下降，小麦幼苗Cu、Fe、Ca和Mg累积量呈下降趋势，而Zn、Mn累积量呈增加趋势。小麦幼苗6种营养元素累积率与其累积量的规律较吻合，表明作物受Ni毒害与营养元素代谢平衡失调有关。

Abstract: The effects of Ni stress on the absorption and accumulation of Cu，Zn，Fe，Mn，Ca and Mg in the stems and leaves of wheat seedling were studied．The results show that with the increase of Ni content in the soil．the growth of wheat seedling is restrained ，and the biomass is reduced ．As a result，the accuYnulation and the contents of Cu，Fe，Ca and M g in wheat seedling decrease；however．the accuYnulation and the contents of Zn and Mn increase．The identity of the accumulation rate and its regularity of these six mineral elements show that the poisonousness of Ni is correhted withthe imbalan ce of metabolism of mineral nutritious elements．