火干扰对土壤呼吸的影响及测定方法研究进展

Research Progress on Effects of Forest Fire Disturbance on Soil Respiration and Measuring Methods

林火是森林生态系统的重要干扰因子,是导致土壤碳储量发生变化的重要因子。火干扰所排放的含碳气体对物质循环、能量流动和信息传递具有重要影响,进而影响森林生态系统的碳平衡以及气候变化。土壤作为巨大的陆地生态系统储碳库,其与大气碳交换的方式主要是通过土壤呼吸,由于土壤的碳储量巨大,土壤碳库的微小变化都会引起大气CO2浓度的巨大改变,从而影响森林生态系统碳平衡。阐述土壤呼吸的各种测量方法,并对比各种测定方法;火干扰对森林生态系统土壤呼吸速率的影响及其测定方法;火干扰对土壤呼吸环境的影响。最后提出今后在火干扰对土壤呼吸研究中应关注的问题,同时对火干扰与森林生态系统土壤呼吸的研究方向进行展望。

Forest fire is a major disturbance of forest ecosystems,leading to the changes of soil carbon storage.After fire,the balance of forest ecosystems would be destroyed and the climate would be changed because the material cycle,energy flow and information transmission were destroyed with the release of the carbonic gases.Soil is a main biosphere for carbon pool.Soil carbon releases into the atmosphere mainly through soil respiration,and small changes in soil respiration can have a great effect on CO2 atmospheric concentrations due to the tremendous storage of soil carbon.In this paper,we expounded and compared various methods of measuring soil respiration,summarized the effects of forest fire disturbance on soil respiration and measurement methods,and reviewed the conditions of soil respiration after forest fire.And we also suggested and prospected the emphases of further study in forest fire and soil respiration of forest ecosystems.