Soil respiration,mainly produced by soil microorganism and plant roots,is the CO 2 evolution process from soils.As a complicate ecological process,soil respiration is affected not only by biological factors(vegetation and microorganism,etc.)but also by environmental factors(temperature,moisture and pH,etc.).With the increasing humane impacts,it is influenced more and more strongly by man made factors.Based on previous research,main effect factors of soil respiration and their interrelationships were disc...