CAJ | 학술논문

通过盆栽实验，研究了在螯合剂－芥菜型油菜修复镉污染土壤中，不同浓度的3种螯合剂ED－TA、EDDS和草酸对3种土壤酶活性的影响。结果表明，3种螯合剂均显著提高了土壤总Cd去除率，其中ED－TA的效果最好，最佳浓度为3 mmol／kg ，此时土壤总的Cd去除率高达74．57％。EDTA诱导下土壤蔗糖酶和脲酶活性均显著提高，低浓度EDDS和草酸处理，蔗糖酶活性明显提高，但浓度较高时降到与对照组相当的水平；EDDS和草酸的施用对脲酶活性没有显著影响。3种螯合剂诱导下过氧化氢酶活性均受到轻微抑制，但变化不显著。仅在施加EDTA的土壤中蔗糖酶活性与土壤总Cd含量显著负相关，其他处理中蔗糖酶、过氧化氢酶和脲酶活性与土壤总Cd含量的相关性都不显著。
통과분재실험，연구료재오합제－개채형유채수복력오염토양중，불동농도적3충오합제ED－TA、EDDS화초산대3충토양매활성적영향。결과표명，3충오합제균현저제고료토양총Cd거제솔，기중ED－TA적효과최호，최가농도위3 mmol／kg ，차시토양총적Cd거제솔고체74．57％。EDTA유도하토양자당매화뇨매활성균현저제고，저농도EDDS화초산처리，자당매활성명현제고，단농도교고시강도여대조조상당적수평；EDDS화초산적시용대뇨매활성몰유현저영향。3충오합제유도하과양화경매활성균수도경미억제，단변화불현저。부재시가EDTA적토양중자당매활성여토양총Cd함량현저부상관，기타처리중자당매、과양화경매화뇨매활성여토양총Cd함량적상관성도불현저。
Through pot experiment of Brassciajuncea ,it is investigated the influences of three chelators ,EDTA ,EDDS and oxalic acid ,with different concentrations on sucrose ,urease and invertaseactivities during chelator -enhanced phytoremedi-ation of cadmium contaminated soil .Results show that three chelating agents all can significantly increase the total Cd re-moval rate in soils ,of which the result of EDTA is the best ,its optimum concentration is 3 mmol/kg ,and the total Cd re-moval rate is up to 74 .57% .EDTA significantly increases sucrase and urease activities .Low concentration of EDDS and oxalic acid can obviously improve invertase activity ,but the activity is dropped to the comparable level at higher concentra-tion .EDDS and oxalic acid has no significant effects on urease activity .In addition ,catalase activity is slightly inhibited treated by three different chelators ,but changes are not obvious .Only in the treatment of EDTA ,is a significant negative correlation observed between total Cd content and the sucrase activity .In other treatments ,the correlations between sucrase , catalase and urease activities and soil total Cd contents are all not significant .