Cadmium in Rice Is Affected by Fertilizer-Borne Chloride and Sulfate Anions: Long-Term Field Versus Pot Experiments

文献类型： 外文期刊

第一作者： Hussain, Babar

作者： Hussain, Babar;Li, Jumei;Ullah, Aman;Tahir, Nazia;Hussain, Babar;Ma, Yibing;Gao, Jusheng

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关键词： chloride; sulfate; cadmium; paddy soil; rice grain

期刊名称：PROCESSES （ 影响因子：3.352； 五年影响因子：3.338 ）

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年卷期： 2022 年 10 卷 7 期

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收录情况： SCI

摘要： In order to investigate the effects of Cl- and SO42- based fertilizers on the accumulation of cadmium (Cd) in rice plants, a long-term experiment, which has been conducted since 1975, and a short-term pot experiment were designed. The results of the long-term experiment showed that the highest total grain Cd was found in the treatment of fertilizers with rich Cl-, which was 72.7% higher compared to conventional fertilization (CF). However, there was no significant difference between the CF and fertilization with rich SO42- treatments. This phenomenon can be explained by the concentrations of the EDTA extractable Cd being significantly increased by 60% under Cl- treatment, while SO42- treatment showed no significant effect. In the short-term trial, compared to CF, Cd concentrations in the roots increased by 1.07 and 0.93 times in the Cl- and SO42- treated soils, respectively, under Cd1.2 exposure. Meanwhile, Cd concentrations in the shoots enhanced by 96% in Cl- treated soil but decreased by 34.6% in SO42- treated soil. It was therefore concluded that fertilizer-borne Cl- significantly increased the Cd concentration in rice grains in the long-term experiment, but fertilizer-borne SO42- had no significant effect on the Cd concentration in rice grains. However, in the pot experiment, SO42- based fertilizers decreased Cd transport to the shoots of a rice plant grown in a Cd contaminated soil. These findings will improve the rational fertilization of Cd contaminated soils and the production of safer rice.

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