土壤钝化材料及叶面阻控对镉污染农田修复效果研究  

Study on Effects of Soil Passivation Materials and Leaf Surface Control on Remediation of Cadmium Contaminated Farmland

作　　者：常海伟 桂娟 符云聪 CHANG Haiwei;GUI Juan;FU Yuncong(Yonker Environmental Protection Co.,Ltd.,Changsha 410330;National Engineering Research Center for Soil Nutrient Management and Pollution Remediation,Nanjing 210008)

机构地区：[1]永清环保股份有限公司,长沙410330 [2]土壤养分管理与污染修复国家工程研究中心,南京210008

出　　处：《中国农学通报》2024年第16期112-117,共6页Chinese Agricultural Science Bulletin

基　　金：国家重点研发计划项目“冶炼场地与周边土壤重金属原位生物固定稳定修复技术及装备研发”(2018YFC1802702);国家重点研发计划项目“农田重金属污染阻隔和钝化技术与材料研发”(2016YFD0800700)。

摘　　要：研究旨在评估2种不同的钝化剂材料结合叶面阻控技术在修复中轻度镉污染农田方面的效果,并筛选出有效的农田修复材料。研究在一个典型的中轻度镉污染农田进行,采用2种不同的钝化剂材料配合叶面阻控技术,分析了它们对土壤pH、有效态Cd含量及水稻各部位(根系、茎叶和糙米)中Cd含量的影响。结果显示,与对照(CK)相比,不同处理的pH均有一定程度的增加(0.5%~12.5%)。SF1和SF2处理中土壤有效态Cd含量分别降低23.4%~36.7%和15.1%~30.8%;水稻根系中Cd含量分别降低70.5%~79.4%和65.2%~72.6%,茎叶中Cd含量分别降低36.7%~50.0%、18.8%~38.4%,糙米中Cd含量分别降低60.1%~74.4%、47.4%~72.2%;由此可见,2种钝化剂均能有效降低土壤有效态Cd含量,影响水稻各部位对Cd的富集,叶面阻控能进一步抑制Cd在水稻植株中的转运,从而降低Cd在稻米中的积累。To explore the effects of different passivation materials with foliar inhibitor technology on the remediation of cadmium polluted farmland,screening the targeted remediation materials,this study selected a typical moderate and mild cadmium polluted farmland for demonstration,and adopted two different passivation materials with foliar inhibitor technology to study the effects on soil pH,available Cd and Cd content in various parts of rice.The results showed that compared with the control(CK),the pH of different treatments all increased to a certain extent(0.5%-12.5%).In SF1 and SF2,the available Cd content decreased by 23.4%-36.7%and 15.1%-30.8%,respectively;the Cd content in rice roots decreased by 70.5%-79.4%and 65.2%-72.6%,respectively;the Cd content in stems and leaves decreased by 36.7%-50.0%and 18.8%-38.4%,respectively;the Cd content in brown rice decreased by 60.1%-74.4%and 47.4%-72.2%,respectively;it could be seen that both passivation materials could effectively reduce the content of available Cd in soil,affected the enrichment of Cd in various parts of rice,and the foliar inhibitor could further inhibit the transport of Cd in rice plants,reducing the accumulation of Cd in rice deeply.

关 键 词：土壤钝化 农田修复 镉污染 水稻 富集 转运 叶面阻控技术 土壤PH 有效态镉 水稻镉含量 

分 类 号：X53[环境科学与工程—环境工程]