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生态学杂志 ›› 2000, Vol. ›› Issue (4): 12-17.

• 研究报告 • 上一篇    下一篇

富营养化与污染物间的相互作用及其生态效应

余国营, 徐小清, 张晓华, 敖鸿毅   

  1. 中国科学院水生生物研究所, 武汉 430072
  • 收稿日期:1998-01-20 修回日期:2000-04-03 出版日期:2000-08-10

Mechanism and Ecological Effects of the Joint Action of Eutrophication and Heavy Metals

Yu Guoying, Zhang Xiaohua, Xu Xiaoqing, Ao Hongyi   

  1. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072
  • Received:1998-01-20 Revised:2000-04-03 Online:2000-08-10

关键词: 野生大麦, 磷素利用效率, 根际土壤, 无机磷组分

Abstract: Orthogonal experimental methods were applied to study effects of the joint action of eutrophication(nitrogen and phosphorus) and heavy metals(cadmium, lead and copper, zinc,chromium, arsenic etc.) pollution on growth and accumulation of the elements in Lemna minor L. and the desorption of elements in sediment by the cultivating test. And it is tried to find the principle of the combined pollution of eutrophication and heavy metals. The results showed that accumulation of the heavy metals in the plant mainly depended on the concentration in the water, and also depended on the nutrient level and co-existing elements of the water. High level of the nutrients could increase the primary production and partly low the toxicity of the heavy metals. The desorption of heavy metals in sediment obviously varied with the nutrient level in the water and with effctive order of Cd>As>Pb>Zn>Cr>Cu. There were certain correlations among the elements.

Key words: wild barley, phosphorus use efficiency, rhizosphere soil, inorganic phosphorus fraction.