摘要
[目的]研究不同螯合剂对重金属污染土壤酶和呼吸强度的影响。[方法]在盆栽油菜的土壤中添加螯合剂,测定土壤pH值、土壤脲酶、过氧化氢酶活性以及土壤呼吸强度。[结果]施用螯合剂EDTA、DTPA和柠檬酸刺激了土壤过氧化氢酶、土壤脲酶活性。土壤中施入螯合剂后,土壤呼吸强度降低,尤其是在施入初期降低作用最为明显。螯合剂DTPA和柠檬酸施入初期、2周时,土壤pH值降低,随处理浓度的增加pH值降低更为明显,而螯合剂EDTA处理则相反。[结论]在重金属污染土壤上以施用螯合剂EDTA、DTPA为好。
[ Objective ] The aim was to study the effects of different chelators on soil enzyme and soil respiration in heavy metal contamination soil. [ Method ] The chelators were added to the soil of potted rape. pH value, soil urease, catalase activity and soil respiration intensity were determined. [ Result] Soil hydrogen peroxidase activities and soil urease activities were increased by EDTA, DTPA and citric acid. And soil respiration was lower than that of control, especially during the early days. Soil pH was reduced with applying DTPA and citric acid during the early days and 2 weeks, which was very obvious with increasing concentration, while the results of EDTA were contrary. [ Conclusion ] The effect of using chelator （EDTA, DTPA） was better than that of citric acid in heavy metal contamination soil.
出处
《安徽农业科学》
CAS
北大核心
2009年第35期17623-17625,共3页
Journal of Anhui Agricultural Sciences
基金
上海科技兴农重点攻关项目(沪农科攻字<2003>第10-5号)
关键词
螯合剂
重金属
土壤污染
土壤酶
土壤呼吸强度
Chelators
Heavy metal
Soil contamination
Soil enzyme
Soil respiration
