土壤碳储量及其碳固定研究

土壤碳库是陆地生态系统中最大且周转时间最慢的碳库,全球碳储量的最低值为719Pg,最高值为2 946Pg,中国土壤总有机碳库最高值接近180Pg。在对现有资料整理的基础上,着重讨论了土壤碳储量及其估计方法,包括森林类型法、土壤类型法、生命带类型法、模型法和遥感影像法等,分析了影响农业土壤固碳主要有气候因素、土壤理化性质因素和农业耕作措施等因素,指出农田土壤的碳固定将成为今后研究的热点,研究土壤与大气、植被碳库之间的碳交换过程,成为我们下一步工作的重点。

Review on Soil Carbon Storage and Carbon Sequestration

Soil carbon pool is the largest terrestrial ecosystem and the slowest turnover time.Under the influence of moisture and temperature,soil carbon storage can remit carbon,and it also can become a source of carbon emissions.Expects global low carbon was 719Pg,peaks at 2 946Pg,while the Chinese soil total organic carbon peak near 180Pg.Based on the study of existing data, the research method of soil carbon storage was soil taxonomy,forest type,Holdridge zones,model and remote sensing image and so on.The results showed that the climate factors,the soil factor of physical and chemical and the farming measures influencing agricultural soil carbon sequestration.Farmland soil carbon fixation will become research hot spot in the future.The research that between soil and atmosphere,vegetation carbon exchange process will become the focus of our next work.