Abstract
Based on the systematic fieldwork and the sampling of soil and corn, this paper studied the geochemical characteristic and the characteristic of total and available Ni in black soil and corn and the effects on them by the geochemical methods and SPSS software. The aim was to show the characteristic of Ni transformation and accumulation through soil-crop continuum and the influencing factors for food security. The results showed that total Ni in black soil of Jilin Province are above Jilin and national background level, the content of Ni is keeping the natural background in black soil in Jilin province. The influence of human activities in this district till now is comparatively less. The transformation degree of available Ni is relatively high. The degree of Ni accumulation in corn is low. The total Ni in soil have controlled effect on the available Ni, and the total Cu, Cr, Zn and the available Cr play a significant role in Ni transformation. The slight acid soil is better for Ni transformation and accumulation.
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