Soil Respiration and its Three Biological Processes

Soil respiration includes three biological processes: soil microbes respiration,roots respiration and soil fauna respiration.Different process have different C source,thus the three biological processes have different contribution to the total soil respiration.Separating these three biological processes is difficult and important for soil research,only understanding the proportion of every process in total soil respiration,can master the essence of soil respiration,the distribution and the efflux of C.Through the survey of the publications over the worlds,the theory,the effect mechanism and the advances of three biological processes of soil respiration were compared and reviewed,then bring forward the approaches that separate the three biological processes.For the measurement of soil fauna respiration,this paper lists the relevant research specially.