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应用生态学报 ›› 1995, Vol. 6 ›› Issue (1): 76-80.

• 研究论文 • 上一篇    下一篇

白洋淀水陆交错带对陆源营养物质的截留作用初步研究

尹澄清, 兰智文, 晏维金   

  1. 中国科学院生态环境研究中心, 北京 100085
  • 收稿日期:1994-05-03 修回日期:1994-08-25 出版日期:1995-01-25 发布日期:1995-01-25
  • 基金资助:

    国家自然科学基金;中国科学院资助项目

Retention of allochthonous nutrients by ecotones or Baiyangdian Lake

Yin Chengqing, Lan Zhiwen, Yan Weijin   

  1. Research Center for Eco-Environmental Sciences, AcademiaSinica, Beijing 100085
  • Received:1994-05-03 Revised:1994-08-25 Online:1995-01-25 Published:1995-01-25

摘要: 在白洋淀进行的野外实验结果表明水陆交错带中的芦苇群落和群落间的小沟都能有效地截留来自府河的陆源营养物质。其中,有植被290m长的小沟对地表径流总N和总P的截留分别为42和65%;4m芦苇根区土壤对地表下径流总N和总P的截留率分别为64和92%.被截留比率最大的是无机态的正磷酸根态磷和铵态氮。

关键词: 水陆交错带, 芦苇, 营养物质, 白洋淀, 截留, 微生物生物量碳, 颗粒有机碳, 空间分布, 水溶性碳, 耕作侵蚀

Abstract: Field experiments show that reed community and ditches in Baiyangdian Lake ecotonescan effectively retain nutrient elements from land sources.Under moderate hydrologicalcondition, water flows through the ditches and the root zone of reed community.The retention of total nitrogen (TN) and total phosphorus (TP) by a 300m ditch is measured tobe 42 and 65 % respectively, and that by a 4m distance of reed community soil is respectively 64 and 92%.The retention by reed community mainly happens at the rhizosphere,while the removal of organic matter is less in comparison with inorganic nutrients.Thecomponents retained at the largest ratio are ammonia nitrogen and ortho-phosphate phosphorus.These retention effects play an important role in stabilizing the adjacent ecosystems and reducing the eutrophication of waters.

Key words: Land/inland water ecotone, Reed, Nutrient, Baiyangdian Lake, Retention, particulate orga-nic carbon, microbial biomass carbon, tillage erosion, spatial distribution, dissolved organic carbon