3种改良剂对油菜生物量及其吸收重金属的影响  

Effect of Three Amendments on Cole Yield and Cole's Absorbing Heavy Metals

作　　者：李丽君[1] 张强[1] 白光洁[1] 刘平[1] 丁玉川[1] 聂督[1] 武文丽[1] 

机构地区：[1]山西省农业科学院农业环境与资源研究所,太原030006

出　　处：《水土保持学报》2012年第5期154-159,共6页Journal of Soil and Water Conservation

基　　金：山西省科技厅攻关项目(20090311071);山西省科技厅国际合作项目(2010081009);山西省科技厅自然科学基金项目(2012011046-5)

摘　　要：通过连续三季盆栽试验研究粉煤灰、膨润土、腐殖酸提高油菜生物量,降低油菜Cd、Pb、Cu、Zn浓度的效果。结果表明,膨润土、腐殖酸、粉煤灰的施入提高油菜生物量的效果第二季好于第一、三季。仅考虑对生物量的影响,改良剂效果为膨润土>腐殖酸>粉煤灰。第二季膨润土降低油菜Cd浓度效果较好;第二季粉煤灰、第二季膨润土及第二、三季腐殖酸降低油菜Pb浓度效果较好,3种改良剂均有降低油菜中Pb浓度的效果;3种改良剂均未显著影响油菜中Cu浓度;第二季膨润土降低油菜Zn浓度效果较好。3种改良剂抑制土壤重金属进入油菜的效果不同,应用时可根据改良剂特点适时施入土壤,充分发挥改良剂吸附、固定重金属的作用。Based on current situation of heavy metals contamination in China,pot experiments were conducted for three seasons to investigate the effects of coal fly ash,bentonite,and humic acid added to the soil with Cd,Pb,Cu,and Zn on improving cole yield,and on inhibiting uptake of Cd,Pb,Cu and Zn in cole.The biomass yield of cole was investigated after harvest,and the amounts of Cd,Pb,Cu and Zn absorbed in harvested cole with application amendments were determined.Results showed that proper amount of three amendments could improve cole biomass,reduce Cd,Pb,Cu,Zn content in cole.The cole yield was the highest on the second season,and the effects of improving cole yield was bentonite humic acid coal fly ash.The effect of bentonite on reducing the Cd content in cole on the second season was the best.The Pb content in cole was reduced effectively with coal fly ash and with bentonite on the second season,and with humic acid on the second and third seasons,and these amendments could keep Pb from going into cole from soil polluted with Pb.Cu content in cole was not influenced significantly with these amendments.The effect of bentonite on the second season on decreasing Zn content in cole was better than that of other two amendments.The function of all amendments for reducing Cd,Pb,Cu and Zn was different from each other,so in practice,three amendments should be input into soil according to their characteristics in proper time in order that they could absorb heavy metals in soil completely.

关 键 词：粉煤灰 膨润土 腐殖酸 重金属 油菜 

分 类 号：X53[环境科学与工程—环境工程] S156[农业科学—土壤学]