水分及凋落物对若尔盖泥炭土CH4排放的影响

doi:10.11934/j.issn.1673-4831.2015.04.016

Abstract

Abstract:

Water is one of the key factors affecting CH₄emission in wetlands. To investigate effects of soil moisture content and litters on CH₄ emission,an indoor incubation experiment was performed using peat collected from the Zoige Wetlands. The experiment was designed to have three treatments in soil moisture content [Treatment 60%（ unsaturated soil moisture,60% of soil water holding capacity）,Treatment 100%（ saturated soil moisture,100% of soil water holding capacity） and Treatment WDA（ wetting-drying alternation） ] and two treatments in litter（ with or without litters addition）.Results show that the effects of soil moisture and litters on CH₄emission from the peat were significant. Compared to Treatment 60%,Treatment WDA was significantly higher and Treatment 100% the highest in CH4 emission. Addition of litters promoted CH₄ emission rate and cumulative emission in peat. CH₄ emission from the peat responded the most quickly to litters addition in Treatment 100%,not so quickly in Treatment WDA and the slowest in Treatment 60%.

Key words: Zoige wetland, peat, litters, wetting-drying alternation, CH₄

DENG Zhao-heng, ZHANG Xue-wen, GAO Ju-juan,GAO Jun-qin . Effects of Soil Moisture and Litter on CH4 Emission From Peat in Zoige Wetlands[J]. Journal of Ecology and Rural Environment, 2015, 31(4): 548-552.

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Effects of Soil Moisture and Litter on CH4 Emission From Peat in Zoige Wetlands

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