环境科学
温室气体
土壤碳
土壤有机质
土壤呼吸
土壤质地
碳循环
土壤水分
生态系统
生物量(生态学)
固碳
土壤生物多样性
二氧化碳
农学
土壤科学
生态学
生物
出处
期刊:Ecology and the Environment
[WIT Press]
日期:2007-01-01
被引量:4
摘要
Soil is a major source of greenhouse gases (GHG), such as carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), which are mainly resulted from root respiration, microbial respiration and soil fauna respiration. Study on the mechanism of GHG generation and influencing factors is one of the major concerns on global carbon and nitrogen cycle. A number of factors, including soil temperature, soil water content (SWC), soil organic matter (SOM), pH, Soil redox potential (Eh), soil texture, etc. contribute a lot to GHG fluxes by influencing soil microbial biomass, physiological and biochemical processes. Among these, soil temperature, SWC and SOM are identified as the main parameters in relation to soil GHG emission. Furthermore, local climate situation, soil management, land-use changes and vegetation cover also play a role in GHG emission by affecting microbial activity and substrate quality. The review highlights recent work on the mechanism of GHG fluxes, key factors, diurnal and seasonal variation. We suggest that future research should focus on dynamics of GHG fluxes within micro-environment, efflux modeling and its scaling-up, carbon sequestration and carbon mitigation in terrestrial ecosystem and coastal ecosystem, especially for plantation and farmland in China.
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