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应用生态学报 ›› 1996, Vol. 7 ›› Issue (2): 201-206.

• 研究论文 • 上一篇    下一篇

杨树落叶前后重金属元素内外迁移循环规律研究

余国营, 吴燕玉, 王新   

  1. 中国科学院沈阳应用生态研究所, 沈阳110015
  • 收稿日期:1995-07-18 修回日期:1995-12-19 出版日期:1996-04-25 发布日期:1996-04-25
  • 基金资助:

    国家自然科学基金;中国科学院陆地生态系统痕量物质生态过程开放实验室基金资助项目

Transferring and cycling of heavy metals in and out of poplar tree before and after its leaf fallen

Yu Guoying, Wu Yanyu, Wang Xin   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1995-07-18 Revised:1995-12-19 Online:1996-04-25 Published:1996-04-25

摘要: 供试元素在杨树各部位的含量和贮量为Zn>Cu>As>Pb>Cd,并与环境中相应元素浓度呈正相关.落叶时元素的迁移主要发生在叶、枝、根和干之间,叶中8~48%的As、Zn迁移至主干的皮与材中,而Cu、Pb、Cd贮量均有增加,Zn、As的内循环占总循环量的40%,Cd、Pb、Cu表现为外循环,占总贮量的17~27%.同时分析了植物对土壤重金属污染的净化效率.

关键词: 杨树, 重金属, 循环, 净化效率, CO2浓度升高, 水溶性有机碳, 氮素添加, 根际, 水溶性有机氮

Abstract: The transferring of heavy metals in poplar tree during its leaf fallen mainly occurs in the parts of leaf-branch, root and trunk. 8~48% of As and Zn in leaf is transferred to bark and timber, and the storage of Cu, Ph and Cd is increased. The internal cycling rate of As and Zn occupies 40%, and the external one of Cd, Ph and Cu occupies 17~27% of their storage. The purification efficiency of soil heavy metals by plants is also discussed in this paper.

Key words: Poplar tree, Heavy metals, Cycling, Purification efficiency, dissolved organic nitrogen, rhizosphere, dissolved organic carbon, nitrogen addition, elevated CO2 concentration