Research on enrichment effect of cadmium by three plants in soil

doi:10.14088/j.cnki.issn0439-8114.2022.05.016

Abstract

Abstract: In order to screen out cadmium-enriched plants that can adapt to slightly and moderately heavy metal contaminated farmland, field experiments were carried out to study the growth and the enrichment characteristics of cadmium of three plant species（biomass sorghum, sweet sorghum and castor） in a cadmium contaminated farmland. The results showed that the above-ground biomass of biomass sorghum was 22.574 8 t/hm², which was 1.2 and 5.1 times that of sweet sorghum and castor. The Cd concentrations in each organ of the three plants were in the order of stalk>leaf>ear. The Cd enrichment coefficients in the stalks and leaves of biomass sorghum and sweet sorghum all exceeded 1. The total amount of Cd that can be removed from the shoots of biomass sorghum, sweet sorghum and castor in the season was 24.66, 17.72 and 1.57 g/hm², respectively. Among the three plants, biomass sorghum has the largest biomass and has a strong ability to accumulate Cd,and is a potential plant resource for the remediation of Cd contaminated farmland.

Key words: cadmium, phytoremediation, farmland soil, biomass sorghum

CLC Number:

FENG Jing-yun, NIE Xin-xing, LIU Bo, DUAN Xiao-li, ZHANG Zhi-yi, YANG Li. Research on enrichment effect of cadmium by three plants in soil[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(5): 83-86.

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