农业环境科学学报2011，Vol.30Issue(3)：455-460,6.
钢渣施用对多金属复合污染土壤的改良效果及水稻吸收重金属的影响
Ameliorative Effects of Steel Slag Application on Multi-metal Contaminated Soil and Heavy Metal Uptake of Rice
摘要
Abstract
Heavy metal pollution of farmland soil is getting more and more serious in China nowadays due to mining activity, discharge of indnstrial effluents and long-time application of pesticide and chemical fertilizers.Since heavy metals are toxic to crops, the continuous cultivation in contaminated soil would decrease crop production capacity.Heavy metals can be also accumulated in human bodies through food chains.Application of soil amendments is an effective way to solve these kinds of problems, especially in slightly and moderately-polluted soil.Steel slag is one kind of by-products of steel smelting.In this paper, pot experiment and field experiment were conducted to investigate the effects of steel slag application on pH value, available silicon and available heavy metal content(Cd, Pb, Cu, Zn) in multi-metal contaminated soil and heavy metal uptake by rice plant.Five treatments were designed in the pot experiment consisting of CK( No slag), SS3 and SS6 (3 g· kg-1 and 6 g· kg-1 of 100 mesh slag respectively ), FSS3 and FSS6( 3 g· kg-1 and 6 g· kg-1 of 180 mesh slag respectively ).And the field experiment contained 2 treatment: CK( No slag)and SS( 3g·kg-1 of 100 mesh slag respectirely ).The results of the pot experiment showed that soil pH and available silicon content increased with the increase of the amount of slag application and along with the decrease of the slag particle size.And soil available heavy metal content decreased significantly in the slag application treatments.Heavy metal concentration in shoot of rice plant decreased significantly with the slag application and was far lower than that in root.Heavy metal concentration in the root with the slag application sharply decreased in compared to CK.And the field experiment showed that steel slag application could dramatically increase rice production and decrease the heavy metal concentration in polished rice.In conclusion, steel slag application could effectively improve the quality of contaminated soil, restrain the heavy metal uptake of rice plant, and decrease the heavy metal concentration especially in the shoot of rice plant.关键词
土壤/重金属/钢渣/水稻/硅Key words
soil/ heavy metal/ steel slag/ rice/ silicon分类
资源环境引用本文复制引用
邓腾灏博,谷海红,仇荣亮..钢渣施用对多金属复合污染土壤的改良效果及水稻吸收重金属的影响[J].农业环境科学学报,2011,30(3):455-460,6.基金项目
国家高技术研究发展计划(863计划)重点项目(2007AA061001) （863计划）
国家自然科学基金-广东联合基金重点项目(U0833004) （U0833004）
