人类活动影响下淡水沼泽湿地温室气体排放变化

doi:10.13249/j.cnki.sgs.2006.01.82

地理科学 ›› 2006, Vol. 26 ›› Issue (1): 82-86.doi: 10.13249/j.cnki.sgs.2006.01.82

人类活动影响下淡水沼泽湿地温室气体排放变化

宋长春¹, 王毅勇¹, 王跃思², 赵志春¹

1. 中国科学院东北地理与农业生态研究所, 吉林长春130012;
2. 中国科学院大气物理研究所, 北京100029

收稿日期:2004-10-15 修回日期:2005-03-21 出版日期:2006-01-20 发布日期:2006-01-20
基金资助:
国家自然科学基金(40471124)、中国科学院知识创新工程重大项目(KZCX1-SW-01、KZCX3-SW-332)资助。

Character of the Greenhouse Gas Emission in the Freshwater Mire under Human Activities

SONG Chang-Chun¹, WANG Yi-Yong¹, WANG Yue-Si², ZHAO Zhi-Chun¹

1. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin 130012;
2. The Institute of Atmosphere Physics, Chinese Academy of Science, Beijing 100029

Received:2004-10-15 Revised:2005-03-21 Online:2006-01-20 Published:2006-01-20

摘要/Abstract

摘要： 利用静态箱/气相色谱法,研究了三江平原淡水沼泽湿地及垦殖农业利用下CO₂、CH₄、N₂O排放变化。不同类型湿地生长季土壤呼吸速率以季节性积水的小叶章草甸最大,湿地垦殖后土壤呼吸速率明显增大。不同类型沼泽湿地CH₄排放在时空两个方面都有明显的变化,与土壤水分条件、植物群落类型和生长状况有密切关系。沼泽湿地及垦殖后农田土壤在植物生长季都为N₂O的源,常年积水沼泽湿地在植物生长季N₂O排放通量值较小,而土壤水分常年处于非饱和的草甸灌丛土壤N₂O排放相对较高,垦殖后农田土壤N₂O排放通量最大,沼泽湿地土壤N₂O排放通量与土壤温度呈正相关关系,而垦殖后农田土壤不显著。

Abstract: The laws of CO₂, CH₄, N₂O emission were studied in freshwater mire in the Sanjiang Plain with the aid of static chamber techniques. During the growing season, in seasonal flooded mire wetlands, Calamagrostis angustifolia shows the strongest soil respiration, however, in perennial flooded mire, Carex lasiocarpa shows the weakest soil respiration; and after the mire wetlands cultivation, soil respiration increase greatly for the influence of soil temperature. The CH₄ emission from different mire wetlands varied greatly in temporal and spatial scales, after the mire wetlands cultivation, CH₄ emission decreases significantly, which maybe tightly related to the soil hydrological and thermal condition, plant community and growing situation. Farmland soil always is the source for N₂O during growing season in the Sanjiang Plain. Weak N₂O emission was observed in perennial flooded mire wetland in growing season, but it is strong from seasonal flooded meadow for its water-saturated soil condition lasting a long term, and highest in farmland soil. Generally, the increasing trend of N₂O emission occurs along with decreasing of soil moisture. The N₂O emission from mire wetlands soil shows significant relation with soil temperature, but insignificant from farmland.

中图分类号:

X132

宋长春, 王毅勇, 王跃思, 赵志春. 人类活动影响下淡水沼泽湿地温室气体排放变化[J]. 地理科学, 2006, 26(1): 82-86.

SONG Chang-Chun, WANG Yi-Yong, WANG Yue-Si, ZHAO Zhi-Chun. Character of the Greenhouse Gas Emission in the Freshwater Mire under Human Activities[J]. SCIENTIA GEOGRAPHICA SINICA, 2006, 26(1): 82-86.

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人类活动影响下淡水沼泽湿地温室气体排放变化

Character of the Greenhouse Gas Emission in the Freshwater Mire under Human Activities

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