摘要
关于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的研究目前仍嫌较少,该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。
The hot project about the effects of silicon on vegetable heavy bioavailability and chrome fractionation in vegetable field has been less carried out. The effect of different dosages of silicon by application on chrome forms 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.
出处
《生态环境》
CSCD
北大核心
2008年第1期227-231,共5页
Ecology and Environmnet
基金
广东省农业攻关项目(2006B20601007
2007B060401030)
关键词
硅
铬
铬形态
小白菜
生物有效性
silicon
chrome
chrome form
Brassica chinensis
bioavailability
