摘要
为了提高低汞污染农田土壤的修复效率,在低汞污染农田土壤中投加富里酸(投加量为0 kg/m2、0.075 kg/m2、0.150 kg/m2、0.225 kg/m2),并在试验结束后分析植株生物量和组织内汞含量及土壤总汞、有效汞含量,研究棉花对汞的富集情况。结果表明:投加富里酸对棉花植株生物量没有显著影响,但能提高植物中总汞的含量,促进植物根部汞向地上部分转运以及土壤总汞和有效汞的降低。富里酸投加量为0.075 kg/m2时促进效果最好,修复后,土壤总汞含量由0.45 mg/kg降低到0.34 mg/kg,土壤有效汞含量由1.45μg/kg降低到0.28μg/kg。所有处理中,棉絮没有汞检出。投加富里酸可作为促进棉花修复低汞污染农田土壤的潜在修复技术。
In order to improve the remediation efficiency of low mercury contaminated farmland soil,fulvic acid(dosage:0 kg/m2,0.075 kg/m2,0.150 kg/m2,0.225 kg/m2)was added to the low mercury contaminated farmland soil.After the experiment,the plant biomass,the mercury content in tissue,the total mercury and the effective mercury content in soil were analyzed,and the enrichment of mercury in cotton was studied.The results showed that the addition of fulvic acid had no significant effect on the biomass of cotton plants,but could increase the content of total mercury in plants,promote the transport of mercury from plant roots to aboveground parts and reduce the total and effective mercury in soil.When the fulvic acid dosage was 0.075 kg/m2,the promotion effect was the best.After remediation,the total mercury content of soil decreased from 0.45 mg/kg to 0.34 mg/kg,and the effective mercury content of soil decreased from 1.45μg/kg to 0.28μg/kg.In all treatments,no mercury was detected in the cotton wadding.The addition of fulvic acid could be used as a potential remediation technology to promote remediation of low mercury contaminated farmland soil by cotton.
作者
徐灿灿
孙达
王根荣
李瑾
刘锐
陈吕军
XU Cancan;SUN Da;WANG Genrong;LI Jin;LIU Rui;CHEN Lujun(Zhejiang Provincial Key Laboratory of Water Science and Technology,Deeartment of Environment,Yangtze Delta Region Institute of Tsinghua University,Zhejiang,Jicixing 314006,China;Agricultural Economic Bureau of Nanhu District,Jiaxing City,Jiaxing 314001,China;School of Environment,Tsinghua University,Beijing 100084,China)
出处
《上海农业学报》
2020年第3期70-74,共5页
Acta Agriculturae Shanghai
基金
嘉兴市南湖区农业“两区”土壤修复示范项目。
关键词
汞污染农田土壤
富里酸
棉花
植物修复
Mercury contaminated farmland soil
Fulvic acid
Cotton
Phytoremediation
