Toxicity and accumulation of copper and nickel in maize plants cropped on calcareous and acidic field soils

文献类型： 外文期刊

第一作者： Guo, X. Y.

作者： Guo, X. Y.;Zuo, Y. B.;Wang, B. R.;Li, J. M.;Ma, Y. B.

作者机构：

关键词： copper;nickel;corn;soil pollution;toxicity.;Accumulation;Internet resource.

期刊名称：PLANT AND SOIL （ 影响因子：4.192； 五年影响因子：4.712 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Field experiments in calcareous and acidic field soils were conducted to study the effects of copper (Cu) and nickel (Ni) added to soils on maize growth and metal accumulation in maize plants. The results revealed that the critical concentrations of Cu added to soils that decreased maize grain yield by 10% (EC) were 711 mg kgp# for calcareous soil with a pH of 8.9, and 23 mg kgp# for acidic soil with a pH of 5.3. The toxicity thresholds of EC did not differ significantly for Cu and Ni. A different pattern of Cu and Ni accumulation in maize plants was also found. The accumulation of Cu in above-ground parts of the plants increased initially as the concentrations of Cu added to soils increased, after which they decreased to a constant level. As the concentrations of Ni added to soils increased, the accumulation of Ni in stems and leaves increased linearly, but the accumulation of Ni in the grains was nonlinear. Additionally, the results revealed that Ni was transported to grains more easily than Cu. The results also showed that the concentrations of Cu and Ni in soil solutions as toxicity predictors and the critical concentrations of Cu and Ni in maize were all soil-dependent.

分类号： S15

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