摘要
可降解螯合剂可增加植物对重金属的富集作用。试验以刺槐材料,在铅(Pb)600 mg·kg^(-1)和镉(Cd)20 mg·kg^(-1)复合污染土壤中,加入不同浓度0.5、2.5和5.0 mmol·kg^(-1)的氮基三乙酸(Nitrilotriacetic acid,NTA)和脂肪醇聚氧乙烯醚硫酸钠(Sodium Alcohol Ether Sulphate,AES),测定其对离子富集、刺槐生长特性及土壤特性的影响。结果表明:NTA和AES均促进了刺槐根对铅镉离子的富集,低浓度NTA与高浓度AES促进了刺槐根干重的累积;高浓度AES显著提高了刺槐地上部对铅镉离子的富集(p<0.05),铅镉离子转运率AES>NTA;NTA和AES螯合剂处理对刺槐幼苗生长影响不显著;螯合剂处理促进了土壤酸性磷酸酶活性;土壤pH值AES>NTA。高浓度5.0 mmol·kg^(-1)AES对刺槐生物量的积累、铅镉离子的富集和向地上部的转运均有良好促进作用,在刺槐强化修复重金属污染土壤中具有一定的参考价值。
The degradation chelating agent can increase the enrichment of heavy metals in plants.To study the effects of degradable chelating agents on the seedlings and soil properties of Robinia pseudoacacia under Pb and Cd stress,different concentrations of Nitrilotriacetic acid(NTA)and sodium fatty alcohol ethoxylate sulphate(AES)were added to Pb 600 mg·kg^(-1)and Cd 20 mg·kg^(-1)complex contaminated soils using R.pseudoacacia as test materials.The effects on the ion enrichment,growth characteristics and soil properties of R.pseudoacacia were determined.The results showed that NTA and AES promoted the accumulation of Pb and Cd ions in R.pseudoacacia root,and while high concentrations of AES and low concentrations of NTA promoted the accumulation of dry weight in R.pseudoacacia root.High concentrations of AES and low concentrations of NTA promoted the enrichment of Pb-Cd ions in the lower part of the R.pseudoacacia ground,and the transport rate of Pb-Cd ions by AES>NTA.NTA and AES chelating agents had no significant effect on the growth of R.pseudoacacia seedlings,but improved soil acid phosphatase activity,and the transport rate of Pb-Cd ions by AES>NTA.High concentration of AES had a good effect on the accumulation of biomass,the enrichment of Pb-Cd ions and the translocation of Pb-Cd ions to aboveground parts of R.pseudoacacia and has some reference value in the enhanced remediation of heavy metal contaminated soil in R.pseudoacacia.
作者
张少伟
王琳
刘淑萍
刘昌胜
赵晓改
Zhang Shaowei;Wang Lin;Liu Shuping;Liu Changsheng;Zhao Xiaogai(The Open University of Henan,Zhengzhou 450046,China;Henan Institute of Science and Technology,Henan Xinxiang 453003,China)
出处
《河南林业科技》
2024年第3期20-24,共5页
Journal of Henan Forestry Science and Technology
基金
河南乡村环境生态修复与规划设计工程技术研究中心项目(豫科实[2023]1号)
2023年度创新人才支持计划项目(项目编号:PDGC-2023-007)。
关键词
刺槐
螯合剂
铅镉胁迫
AES
NTA
离子富集
土壤特性
Robinia pseudoacacia
Chelating agent
Pb and Cd stress
AES
NTA
Ionen accumulation
Soil characteristics
作者简介
张少伟(1981-),男,河南安阳,副教授,研究方向:城市绿化树种选育;通信作者:赵晓改(1987-),女,河南禹州,讲师,研究方向:林木生物技术。
