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- Title
Temporal variation of soil greenhouse gases fluxes in a cold-temperate Larix gmelinii forest in Inner Mongolia, China.
- Authors
MA Xiu-zhi; ZHANG Qiu-liang; LI Chang-sheng; CHEN Gao-wa; WANG Fei
- Abstract
By using static chambergas chromatograph technique, an in situ measurement was conducted on the soil CH4,CO2, and N2O fluxes in a coldtemperate Larix gmelinii forest in Inner Mongolia from June to September 2007, aimed to understand the diurnal and seasonal variations of soil greenhouse gasses fluxes and their relations with the associated environmental factors in L. gmelinii forests in coldtemperate zone. In growth season, the soil in the L. gmelinii forest was the sink of atmospheric CH4, with the flux ranged from 22.3 to 107.8 μg CH4C · m-2 · h-1. The mean monthly uptake of CH4 in June, July, August, and September was 34.0±7.1, 71.4±9.4, 86.3±7.9, and 40.7±6.2 μg · m-2 · h-1, respectively. The mean diurnal flux of soil CH4 from June to September showed the same variation trend, i.e., peaked at 10:00 am. The diurnal variation of soil CO2 flux showed an obvious doublepeak, and the mean monthly CO2 flux was in the order of July>August>June> September. Soil N2O flux varied dramatically from -9.1 to 31.7 μg · m-2 · h-1. Soil temperature and humidity were the main factors affecting the CH4 and CO2 fluxes, and soil temperature mainly affected the N2O flux. In the L. gmelinii forest, the CH4, CO2, and N2O fluxes measured at 10:00 am could represent the diurnal CH4, CO2, and N2O fluxes on the same day.
- Subjects
INNER Mongolia (China); CHINA; DAHURIAN larch; APPLIED ecology; GREENHOUSE gases; FORESTS &; forestry; DIURNAL variations in meteorology; CHROMATOGRAPHIC analysis
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2012, Vol 23, Issue 8, p2149
- ISSN
1001-9332
- Publication type
Article