Effects Of Combined Application Of Sulfur And Silicon On Soil Copper Forms And Copper Absorption By Rice
Keywords
Rice, Sulfur, Silicon, Copper, Form
Abstract
Copper is one of the main heavy metal pollutants in farmland in Jiangxi Province. In order to reduce and control the harm of copper to rice growth and improve rice yield and quality, pot experiments were conducted to study different sulfur fertilizers (0, 30, 60, 90kg·hm-2 , calculated as S) and silicon fertilizer (0, 0.5, 1.0, 1.5g·kg-1, calculated as Si) effects on copper absorption by rice and soil copper forms. The results show: (1) The application of sulfur and silicon fertilizers in copper-polluted farmland can reduce the content of acid-extractable Cu in the soil and increase the content of residual Cu, but soil iron-manganese oxide-bound Cu and organic matter/sulfide The content of bound Cu varies depending on the dosage of sulfur and silicon; (2) Each sulfur and silicon treatment can reduce the absorption of copper in stems, leaves, and brown rice by promoting the accumulation of copper in rice roots or reducing the content of available Cu in the soil. accumulation. From the impact on copper content and yield in brown rice, it can be seen that the sulfur dosage of 30kg·hm-2 and the silicon dosage of 1.0g·kg-1 have the best interaction effect, and have application prospects in production.
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Originate research is done by Lu Zhihong, Tan Xueming, Zhu Meiying, Wu Jianfu, Shi Qinghua, Pan Xiaohua DOI: 10.11654/jaes.2013.09.015, pp. 1806-1813
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