【作者】 李淑仪； 林翠兰； 许建光； 蓝佩玲； 廖新荣； 王荣萍；

【Author】 Li Shuyi~1 Lin Cuilan~2 Xu Jianguang~3 Lan Peiling~1 Liao Xinrong~1 Wang Rongping~1 1.Guangdong Institute of Eco-environmental and Soil Science,Guangzhou 510650,China; 2.Guangdong General Station for Soil and Fertilizer,Guangzhou 510500,China; 3.Guangzhou Panyu Environmental Monitoring Station 511400,China

【机构】 广东省生态环境与土壤研究所； 广东省土壤肥料总站； 广州市番禺区环境监测站；

【摘要】 针对硅对蔬菜重金属生物有效性和对菜田土壤重金属铬形态影响的问题目前仍嫌研究较少,为此。本文采用盆栽试验结果讨论了在铬污染菜田土壤上施不同量硅对铬形态和蔬菜生物有效性的影响作用。研究表明,在铬污染条件下,施可溶性硅酸盐,与对照相比,土壤的交换态铬含量降低,而沉淀态铬和残渣态铬含量提高.因而可降低铬的蔬菜生物有效性,使小白菜(Brassica chinensis)体内的铬含量明显降低。同时还可使小白菜的生物量显著提高。更多还原

【Abstract】 The hot project about effect of silicon on vegetable heavy bioavailability and chrome fractionation in vegetable field has been less carried out.The effect of different dosage silicon by application on chrome form and bioavailability in chrome contaminated soil was discussed in this paper.The results showed that the application of soluble silicate could significantly reduce the content of exchangeable Cr,but increase the contents of Cr existed in residual and deposit fraction,which resulting in reduction of Cr bioavailability in vegetable and the increasing of biomass in Brassica Chinensis.更多还原