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- Title
Effects of climate warming on the N<sub>2</sub>O emission from Larix gmelinii gorest soils at different latitudes during soil thawing period.
- Authors
Fu Min-Jie; Wang Chuan-Kuan; Wang Ying; Liu Shi; Ding Shuang
- Abstract
During the soil thawing period in spring, large amount of N2O was emitted from the forest soils in North China, being a major source of atmospheric greenhouse gases. However, the contribution of the emitted N2O and its responses to climatic change are unclear. In this paper, sampling plots of Larix gmelinii forest (including sapling, ground vegetation, and soil A and B horizons) with similar stand conditions in Tahe (52 ° 31′ N), Songling (50 ° 43′ N), Sunwu (49 ° 13′ N), and Dailing (47 ° 05′ N) were displaced to the south boundary of L. gmelinii natural distribution area to simulate that the plots were under climate warming, and their N2O fluxes were measured during the soil thawing period in spring 2007. For the four plots, the N2O fluxes all peaked at the mid- or late stage of soil thawing. The N2O flux of the plots from Dailing, Suwu, Songling, and Tahe during soil thawing period was averagely 66.5 ± 9.3, 54.3 ± 5.6, 44.3 ± 5.3, and 33.5 ± 3.7 microg · m-2 h-1, respectively, and significantly positively correlated to the soil temperature at 5 cm depth and the soil microbial biomass carbon at 0-10 cm depth. No significant relationship was observed between the N2O flux and soil moisture content. The soil N2O emission during soil thawing period differed significantly among the plots. Both the mean N2O flux and the cumulative N2O emission decreased with increasing latitude, mainly due to the differences in soil microbial activities and soil physical properties.
- Subjects
CHINA; THAWING -- Environmental aspects; SOIL biology; FOREST soils; GREENHOUSE effect; GREENHOUSE gases; CLIMATE change; DAHURIAN larch; BIOMASS
- Publication
Yingyong Shengtai Xuebao, 2009, Vol 20, Issue 7, p1635
- ISSN
1001-9332
- Publication type
Article