中国地理科学(英文版) ›› 2010, Vol. 20 ›› Issue (3): 252-257.doi: 10.1007/s11769-010-0252-4

• 论文 • 上一篇    下一篇

Simulation Study on Purification Efficiency for Nitrogen in Different Types of Wetlands in Sanjiang Plain, China

GUO Yue1,2, JIANG Ming1, LU Xianguo1   

  1. 1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China;
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2009-10-10 修回日期:2010-01-27 出版日期:2010-04-01 发布日期:2010-04-23
  • 通讯作者: LU Xianguo.E-mail:luxg@neigae.ac.cn E-mail:luxg@neigae.ac.cn
  • 基金资助:

    Under the auspices of Knowledge Innovation Programes of Chinese Academy of Sciences (No.KZCX2-YW-425-02);National Natural Science Foundation of China (No.40871049);Key Program of National Natural Science Foundation of China (No.40830535)

Simulation Study on Purification Efficiency for Nitrogen in Different Types of Wetlands in Sanjiang Plain, China

GUO Yue1,2, JIANG Ming1, LU Xianguo1   

  1. 1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China;
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2009-10-10 Revised:2010-01-27 Online:2010-04-01 Published:2010-04-23
  • Supported by:

    Under the auspices of Knowledge Innovation Programes of Chinese Academy of Sciences (No.KZCX2-YW-425-02);National Natural Science Foundation of China (No.40871049);Key Program of National Natural Science Foundation of China (No.40830535)

摘要:

The purification law of nitrogen in Deyeuxia angustifolia, Carex lasiocarpa and Deyeuxia angustifolia-Carex lasiocarpa combined wetland systems in the Sanjiang Plain, China was studied by field simulation experiment. The results indicate that the removal rates of TN, NH4+-N and NO3--N in above three types of wetlands present an obvious logarithm growth trend along with the time. There are evident removal effects for NH4+-N and NO3--N in water bodies of wetlands after the 30th day of experiment, with the removal rates over 80.0%, but the removal rate of TN is slightly low, being 63.1%-74.3%. NO3--N is most quickly removed by the combined wetland, and NH4+-N by Deyeuxia angustifolia wetland. The removal speeds of TN by the three wetland systems are comparatively slow, of which the Deyeuxia angustifolia wetland is the fastest. In consideration of plant growth season, Deyeuxia angustifolia wetland has much more practical application value in purifying nitrogen. These results can provide references for the study on the purification function of wetlands and the control of non-point source pollution in Northeast China.

关键词: wetland, Deyeuxia angustifolia, Carex lasiocarpa, nitrogen, removal rate, Sanjiang plain

Abstract:

The purification law of nitrogen in Deyeuxia angustifolia, Carex lasiocarpa and Deyeuxia angustifolia-Carex lasiocarpa combined wetland systems in the Sanjiang Plain, China was studied by field simulation experiment. The results indicate that the removal rates of TN, NH4+-N and NO3--N in above three types of wetlands present an obvious logarithm growth trend along with the time. There are evident removal effects for NH4+-N and NO3--N in water bodies of wetlands after the 30th day of experiment, with the removal rates over 80.0%, but the removal rate of TN is slightly low, being 63.1%-74.3%. NO3--N is most quickly removed by the combined wetland, and NH4+-N by Deyeuxia angustifolia wetland. The removal speeds of TN by the three wetland systems are comparatively slow, of which the Deyeuxia angustifolia wetland is the fastest. In consideration of plant growth season, Deyeuxia angustifolia wetland has much more practical application value in purifying nitrogen. These results can provide references for the study on the purification function of wetlands and the control of non-point source pollution in Northeast China.

Key words: wetland, Deyeuxia angustifolia, Carex lasiocarpa, nitrogen, removal rate, Sanjiang plain