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当前位置: 首页 > 文章 > 干旱年份三江平原沼泽甲烷(CH_4)排放及影响因子 生态学杂志 2006,25 (4) 423-427
Position: Home > Articles > Methane emission from freshwater marshes in Sanjiang Plain and its affecting factors in arid year Chinese Journal of Ecology 2006,25 (4) 423-427

干旱年份三江平原沼泽甲烷(CH_4)排放及影响因子

作  者：
杨文燕;宋长春;栾兆擎;张金波
单  位：
中国科学院东北地理与农业生态研究所
关键词：
三江平原;CH4通量;淡水沼泽;影响因子
摘  要：
为了研究淡水沼泽CH4排放的影响因子及其机制,在中国东北部的三江平原样地观测了CH4排放通量以及部分影响因子。结果表明,在2003年4~10月生长季内,毛果苔草沼泽CH4通量平均值为3.30 mg.m-2.h-1(最小值为0.65 mg.m-2.h-1,最大值为13.47 mg.m-2.h-1),低于小叶章沼泽化草甸CH4通量平均值4.91 mg.m-2.h-1(最小值为-0.12 mg.m-2.h-1,最大值为16.25 mg.m-2.h-1)。在不同阶段,两种类型沼泽CH4通量有明显的变化,控制因子也不一样。4月份低温限制了CH4通量,两种类型沼泽差异很小。5~7月下旬,小叶章沼泽化草甸CH4通量显著高于毛果苔草沼泽CH4通量(P<0.01),这种差异是由融冻作用造成的。8月份,植株密度和剖面中活性有机碳的浓度成为主要的影响因子,毛果苔草沼泽CH4通量比小叶章沼泽化草甸高。
译  名：
Methane emission from freshwater marshes in Sanjiang Plain and its affecting factors in arid year
作  者：
YANG Wenyan~(1,2),SONG Changchun~1,LUAN Zhaoqing~1,ZHANG Jinbo~(1,2) (~1Northeast Institute Geography and(Agricultural) Ecology,Chinese Academy of Sciences,Changchun 130012,China;~2Graduate University of Chinese Academy of Sciences,Beijing 100039,China).
关键词：
Sanjiang Plain,methane flux,freshwater marshes,affecting factors.
摘  要：
To understand the mechanism and affecting factors of CH_4 emission from freshwater marshes,we studied in situ the CH_4 emission in Sanjiang Plain of Northeast China,and its possible affecting factors.The results showed that from April to October 2003,the average CH_4 flux(3.30 mg·m~(-2)·h~(-1)) from Carex lasiocarpa marsh was lower than that(4.91 mg·m~(-2)·h~(-1)) from Deyeucia angustifolia marsh,but the difference was not significant.There were obvious changes in CH_4 flux from these marshes at different stages,and the controlling factor was not the same.In April,lower temperature limited CH_4 flux,but no significant difference was observed between the two marshes.From May to July,CH_4 flux from D.angustfolia marsh was significantly higher than that from C.lasiocarpa marsh (P<0.01),which mainly resulted from thawing-freezing action.In August,stem density and active organic carbon concentration in profiles became controlling factors,and the CH_4 flux from C.lasiocarpa marsh was higher than that from D.angustifolia marsh.

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