土壤垂直剖面的CO_2通量研究  

Research on the Flux of Carbon Dioxide in Soil Vertical Profile

作　　者：王超[1,2] 杨智杰[1,2] 陈光水[1,2] 杨玉盛[1,2] 

机构地区：[1]湿润亚热带山地生态国家重点实验室培育基地,福州350007 [2]福建师范大学地理科学学院,福州350007

出　　处：《亚热带资源与环境学报》2010年第4期85-92,共8页Journal of Subtropical Resources and Environment

基　　金：国家自然基金项目(40901126)

摘　　要：土壤CO2释放通量是全球碳循环的重要流通途径之一,其动态变化直接影响全球C平衡.土壤CO2释放通量在时空上具有很大的变异性.传统研究只关注年、季之间以及水平空间上的土壤通量,对于垂直剖面的CO2通量变化关注较少.土壤释放到大气中的CO2是垂直方向上各个土壤层次共同产生的,因此对其垂直剖面CO2通量研究十分必要.根据近年来国内外最新的研究资料,综合介绍了土壤垂直剖面CO2通量变化以及其影响因素的变化规律,并分析研究中存在的问题.由于土壤垂直剖面的复杂性,对于研究其CO2通量的变化还存在着方法上的困难;使用气体扩散理论计算各层间的通量是否能真正反应自然状态下CO2在土壤中的传输,以及土壤温度、含水量和微生物等因素对通量的影响机理尚不明确.The flux of soil CO2 is an important way in global carbon cycle and its dynamic change immediately influence global C balance.Carbon dioxide flux in soils can vary both temporally and spatially.Traditional researches focused on yearly and seasonal changes of carbon dioxide flux,and the flux of carbon dioxide on soil vertical sections was not enough regarded.The release of carbon dioxide in soil into atmosphere is the produce at various soil depths,therefore it is essential to understand what would happen on different vertical sections.According to latest research at home and abroad,we discuss the change and its factors of soil carbon dioxide in soil vertical profile.Due to the complexity of vertical sections of soil for research,the change of carbon dioxide fluxes on different vertical sections are difficult to be measured.There are some unsures on using gas diffusion theory to calculate each layer for reflecting soil flux,and mechanisms of soil temperature,water content and microorganism affecting soil carbon dioxide flux are still unclear.

关 键 词：土壤碳 土壤通量 垂直剖面 扩散系数 

分 类 号：S152[农业科学—土壤学]