土地利用/覆被变化对土壤温室气体排放通量影响

On the Impacts of Land-use/cover Change on Greenhouse Gas Emission Fluxes

土地利用/覆被变化影响温室气体的净排放,改变了全球温室气体的收支平衡。森林、草地和农田之间的转化、湿地和旱地的转化及土地管理措施的不同,影响着土壤碳的释放和其他痕量气体的排放,从而改变全球变暖增温的综合潜力(GWP),因此要综合考虑土地利用/覆被变化对土壤CO2、CH4和N2O排放通量的影响。加强对温室气体发生机理的研究,选取合理的土地利用和土地管理方式,减少全球大气温室气体浓度增加,是未来研究的重点和难点。

Land use/cover change has changed the global balance of greenhouse gas by affecting its net emission. Synthetic global warming potential （GWP） is changed because the conversion between forest, grassland and farmland or between wet land and dry land and land administration measures affect soil carbon and other trace gas release. Synthetic effect of land use/cover change on releases of CO2 ,CH4 and N2O should be considered. Research on greenhouse gas in respect of its developing mechanism should be strengthened. The emphasis should be put on the rational land use and land administration measures to decrease global greenhouse gas concentration in the future.