Research Progress in Effect of Soil Moisture Content on Soil Respiration
The largest carbon source and carbon sink of terrestrial ecosystems is soil.Soil respiration is an important component of global carbon cycle,and also a key process of regulating and controlling global carbon cycle and climate change.Moreover,it is an important issue of carbon budget in carbon cycle and a crucial field in global change ecology.Since soil moisture is an important disturbance to soil respiration,it is necessary to study the effects of soil moisture from different sources on soil respiration so as to accurately estimate soil respiration,especially in arid and semiarid regions.In this paper,the responses of soil respiration to soil moisture from different sources including precipitation,irrigation and groundwater as well as the processes of soil respiration were compared and analyzed.The results could be referred in further study on soil respiration in the future.