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生态学杂志 ›› 2009, Vol. 28 ›› Issue (09): 1891-1896.

• 综述与专论 • 上一篇    下一篇

菱镁矿粉尘污染土壤机理及其植物修复

杨丹1,2;曾德慧1**;赵琼1   

  1. 1中国科学院沈阳应用生态研究所, 沈阳 110016;2中国科学院研究生院| 北京 100039
  • 出版日期:2009-09-10 发布日期:2009-09-10

Soil contamination by magnesite dusts: Its mechanisms and phytoremediation.

YANG Dan1,2|ZENG De-hui1;ZHAO Qiong1   

  1. 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China|2Graduate University of Chinese Academy of Sciences, Beijing 100039, China
  • Online:2009-09-10 Published:2009-09-10

摘要: 综述了菱镁矿粉尘对土壤的污染和植物的毒害作用机理,分析了镁粉尘污染土壤的改良途径,探讨了植物修复的可行性和关键技术。菱镁矿在开采、生产加工过程中产生的大量粉尘,主要成分为MgCO3和MgO,镁粉尘对土壤的污染和植物的毒害作用主要是通过碱化、板结土壤,以及使土壤中的水溶性钙、镁离子比例失调而造成的。虽然菱镁矿粉尘污染土壤的植物修复研究鲜见报道,但通过植物吸收、植物代谢和植物积累等作用去除土壤中的过量镁具有较强的可行性。

关键词: N2O排放, 控释肥料, 尿素, 稻田

Abstract: This paper summarized the mechanisms of soil contamination and plant damage by magnesite dusts, analyzed the amendment approaches of magnesite dusts-contaminated soil, and discussed the feasibility and key techniques of phytoremediation in the amendment. A mass of dusts, mainly magnesium carbonate and magnesium oxide, is produced when exploiting and producing magnesite, which contaminates soil and damages plant via basifying and hardening soil, and disturbs the balance between soil soluble magnesium and calcium. Though the studies on the phytoremediation of magnesite dusts-contaminated soil are fewer, it is quite feasible to remove the redundant magnesium from soil via plant absorption, metabolism, and accumulation.

Key words: N2O emission, Controlled release fertilizer, Urea, Paddy field