土壤呼吸的影响因素及全球尺度下温度的影响

EFFECT FACTORS OF SOIL RESPIRATION AND THE TEMPERATURE'S EFFECTS ON SOIL RESPIRATION IN THE GLOBAL SCALE

土壤呼吸是指土壤释放ＣＯ２的过程，主要由土壤微生物和根系产生。作为一个复杂的生态学过程，土壤呼吸在受到植被、微生物等生物因素影响的同时，也受到了温度、湿度、ｐＨ值等环境因素的作用，并且随着人类影响的增强，人为因素的作用也越来越大。根据已有工作，讨论了影响土壤呼吸的主要影响因素及其相互关系，分析了全球范围内湿润地区森林植被的土壤呼吸与纬度的关系以及土壤呼吸与年均温的关系，得出了全球范围的Ｑ１０值为１．５７。

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 discussed.The relationships of soil respiration to latitude and to mean annual temperature were analyzed in the humid regions of forest vegetation,and Q 10 value was obtained as 1 57 in the global scale.