农业环境科学学报Issue(12)：2245-2251,7.DOI:10.11654/jaes.2015.12.001
钾硅肥施用对水稻吸收铅、镉的影响
Effects of Potassium-silicon Fertilizer Application on Lead and Cadmium Uptake by Rice
摘要
Abstract
Potassium-silicon fertilizer contains potassium and other elements(silicon, calcium and managesium)and may be used as a po-tential metal-immobilizer. Here a pot experiment was conducted to study the effects of potassium-silicon fertilizer applications on growth and potassium(K), lead(Pb)and cadmium(Cd)uptake of rice, and soil Pb and Cd availability. Applying potassium-silicon fertilizer in-creased plant biomass and K accumulation by 40.4%~47.0%and 170.0%~252.0%, respectively, compared with no K fertilization. However, Pb and Cd content in stems, leaves and grains of rice was decreased significantly by adding potassium-silicon fertilizer. Compared with treatments with K2SO4, applying potassium-silicon fertilizer decreased Pb and Cd content in stems, leaves and grains of rice by 23.6%, 35.6%, and 28.7%, and 15.6%, 29.7%, and 26.8%, respectively. Increasing K fertilizer rates significantly decreased Pb and Cd content in aboveground part of rice. However, there were no significant differences in Pb and Cd content in roots among different treatments. Soil avail-able Pb and Cd content decreased at rice harvest, but they did not show differences between K2SO4 and potassium-silicon fertilizer treat-ments. The present results show that applying potassium-silicon fertilizer meets rice needs for K while inhibiting the uptake of heavy metals by rice aboveground parts.关键词
钾硅肥/铅/镉/水稻Key words
potassium-silicon fertilizer/lead/cadmium/rice分类
农业科技引用本文复制引用
贾倩,胡敏,张洋洋,孟远夺,李小坤,丛日环,任涛..钾硅肥施用对水稻吸收铅、镉的影响[J].农业环境科学学报,2015,(12):2245-2251,7.基金项目
公益性行业（农业）科研专项 （）
