地理科学 ›› 2002, Vol. 22 ›› Issue (4): 500-504.doi: 10.13249/j.cnki.sgs.2002.04.500

• 研究报道 • 上一篇    下一篇

三江平原沼泽湿地与稻田CH4排放对比研究

王德宣1, 吕宪国1, 丁维新2, 蔡祖聪2, 王毅勇1   

  1. 1. 中国科学院长春地理研究所, 吉林 长春 130021;
    2. 中国科学院南京土壤研究所, 江苏 南京 210008
  • 收稿日期:2002-02-27 修回日期:2002-06-20 出版日期:2002-07-20 发布日期:2002-07-20
  • 基金资助:
    中国科学院知识创新工程重要方向项目(KZCX2-302);中国科学院知识创新工程重大项目(KACXI-SW-01)。

Comparison of Methane Emission from Marsh and Paddy Field in Sanjiang Plain

WANG De-xuan1, LU Xian-guo1, DING Wei-xin2, CAI Zu-cong2, Wang Yi-yong1   

  1. 1. Changchun Institute of Geography, the Chinese Academy of Sciences, Changchun, Jilin 130021;
    2. Nanjing Institute of Soil, the Chinese Academy of Sciences, Jiangsu Nanjing 210008
  • Received:2002-02-27 Revised:2002-06-20 Online:2002-07-20 Published:2002-07-20

摘要: 2001年5~10月,在三江平原对毛果苔草沼泽湿地和由沼泽湿地开垦后稻田的CH4排放通量进行了同步观测。三江平原毛果苔草沼泽湿地CH4排放通量范围是1.32~46.38 mg/(m2 ·h),平均值为17.29 mg/(m2·h)。稻田的CH4排放通量范围是0.05~24.37 mg/(m2·h),平均值为6.67 mg/(m2·h)。沼泽湿地CH4排放通量平均值是稻田的2.5倍,水分条件和因土地利用方式改变引起的土壤理化条件变化是导致二者的CH4排放通量产生差异的主要原因。CH4排放通量有明显的季节变化,7~8月高温期出现CH4排放高峰。

Abstract: The Sanjiang Plain is the major distribution area of marsh in China. In the past twenty years, the area of paddy field has increased rapidly from 13.47?104 ha in 1983 to 46.74?104 ha in 1997. The conversion of marsh into paddy field changed intrinsic characters of the soil, which resulted in the change in methane emission. To investigate the difference in methane emission from marsh and paddy field, we simultaneously monitored methane emission from the Carex lasiocarpa marsh and paddy field converted from marsh in Sanjiang Plain from May through October 2001. The results showed that the flux of methane emission from Carex lasiocarpa marsh ranged from 1.32 to 46.38 mg/(m2·h) with an average of 17.29 mg/(m2·h) and from 0.05 to 24.37 mg/(m2·h), averaging 6.67 mg/(m2·h) from paddy field. The former was 2.5 times higher than the latter due to different water condition and soil physical-chemical properties. The obvious seasonal variation of methane flux existed and the highest value occurred in between July and August.

中图分类号: 

  • S161.9