Abstract:

Global warming is one of the urgent environmental problems. Carbon cycle takes a major role in climate changes, which becomes a hot issue interesting more and more scientists. The fractional change of SOC pool and soil respiration may cause violent changes in the climate of the earth. Increasing SOC sequestration and reducing soil carbon dioxide emissions play an important role for relieving global warming. Based on the previous research, the author mainly discussed the research and prospects for soil organic carbon stock and carbon dioxide missions. Meanwhile, the author also analyzed the factors of soil respiration, such as soil temperature, soil water content, atmospheric precipitation and tillage. The author discussed key issues and further tasks, including the mechanism of soil respiration, the factors of carbon emissions, the carbon sequestration and the measures for emission reduction.Key words: Soil organic carbon; Soil organic carbon stock; Soil respiration