岩溶系统土壤吸释CO_2作用及其环境意义──以桂林丫吉村岩溶试验场为例  

CO_2 ABSORPTION & EMISSION FROM SOIL AND ITS ENVIRONMENTAL SIGNIFICANCE IN KARST SYSTEM-AN EXAMPLE OF YAJI KARST EXPERIMENTAL SITE IN GUILIN CHINA

作　　者：陶于祥[1] 潘根兴[2] 刘德辉[2] 孙玉华[2] 

机构地区：[1]中国地质科学院南京地质矿产研究所,210016 [2]南京农业大学资源环境学院,210095

出　　处：《火山地质与矿产》1998年第3期236-241,共6页Volcanology & Mineral Resources

摘　　要：野外监测土壤CO2释放结果表明：土壤CO2释放量晴天高于雨天；洼地、垭口土壤CO2释放量高于坡地土壤CO2释放量；试验场土壤CO2年释放量在1057．8t（1．763kgm-2），与552．6t（0，921kgm-2）之间，估算值为810．0t（1．35kgm-2）。野外溶蚀试验结果表明：试验场岩上作用过程年吸收CO2量为13．08t；岩溶系统年吸收CO2量为61．73t。土壤是温室气体（CO2）的重要贡献者，岩、土、水系统是环境变化的缓冲系统，植树造林（石山改造）是改善岩溶地区生态环境的决定性举措。The observation results of soil CO2 emission in the field display: The content of soil CO2 emission in shine is greater than that in rain; but in depression, CO2 greater than that in slope.The maximum value of yearly soil op emission in experimental site is 1057. 8t(1. 763kgm-2)while the minimun value is 552. 6t (0. 921kgm-2) and the estimated value 810. 0t (1.35kgm-2). The result of limestone tablet dissolution experiment in the field shows: the CO2 absorption content because of rock-soil process in a whole year in experimental site is 13. 08t. The CO2 absorption content of karst system in a whole year is 61. 73t. Soil is the important contributor to warm house gas CO2 . The system of rock-soil-water is a modification system of environ ment variation. Afforestation (rock mountain remade) is a decisive measure to improve ecology environment of karst area.

关 键 词：岩溶系统 土壤 岩溶试验物 二氧化碳 环境效应 

分 类 号：P642.25[天文地球—工程地质学] S153.61[天文地球—地质矿产勘探]