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- Title
螯合剂对鬼针草Cd、Zn、Pb和Cu吸收累积的影响.
- Authors
王天顺; 陈伟; 蒋文艳; 杨玉霞; 李晓妤; 王海军; 廖洁; 莫磊兴
- Abstract
[Objective] To screen the effective chelator which can enhance the absorption of heavy metals by Bidenspilosa L., the effects of chelators[glycol-bis-(2-aminoethylether)-N. N, N’, N’-tetraacetic acid(ETGA), nitrilotriacetic acid(NTA)and ethylene diamine disuccinate(EDDS)]on the uptake and accumulation of Cd, Pb, Cu and Zn with Bidens pilosa L. were investigated. [Method]Pot experiments was conducted to evaluate the effects of application ETGA, NTA and EDDS on the uptake and transportation of heavy metals(Cd, Pb, Cu and Zn)from contaminated mining area soil with Bidenspilosa L.. [Result] The results indicated that three chelators promoted the growth of Bidens pilosa L., and the order of effects was EDDS>EGTA>NTA. Judging from the unit content of root, stem and leaf tissue, EGTA, NTA and EDDS could promote the absorption of Zn in stem, Pb in root and Cu in root, stem and leaf of Bidens pilosa L.. Judging from the total absorption and accumulation of plants, EGTA had the best effect on absorption and accumulation of Zn, EDDS had the best effect on absorption and accumulation of Pb and Cu, and the effects of three chelators on absorption of Cd were not good in Bidens pilosa L.. The accumulation and transfer coefficients of Cu in leaves and stems of Bidens pilosa L. treated with EGTA were higher than the control, indicating that EGTA could effectively promote the accumulation and transportation of Cu in Bidens pilosa L.. [Conclusion] The chelators EGTA and EDDS did not significantly affect the absorption of Cd in Bidens pilosa L., and NTA not only reduced the absorption of Cd in Bidens pilosa L. but also did not significantly increase the absorption of Zn. All three chelators significantly increased the accumulation of Zn, Pb and Cu in Bidens pilosa L.
- Subjects
ETHYLENEDIAMINE; NITRILOTRIACETIC acid; HEAVY metals; MINE soils; ABSORPTION
- Publication
Southwest China Journal of Agricultural Sciences, 2019, Vol 32, Issue 8, p1932
- ISSN
1001-4829
- Publication type
Article
- DOI
10.16213/j.cnki.scjas.2019.8.038