中国岩溶2011，Vol.30Issue(4)：449-455,7.
土地利用和覆被变化对岩溶区土壤CO2浓度的影响
Impact on soil CO2 concentration by the changes of land use and vegetation cover in karst area
摘要
Abstract
Three watersheds, the Mapao-Guozhuang Spring Catchment in Fenyang, Shanxi Province, the Da-longdong Underground River Watershed in Xiangxi, Hunan Province and the Guijiang Watershed in Guangxi Province, with different geologic and climatic conditions are selected as the study areas. Those three watersheds represents different typical land use type and vegetation cover. Their soil CO2 concentrations at 20~50 cm depth under the ground are tested. The results prove that the change of land use and vegetation cover affects intensely on soil CO2 concentration from 20 cm to 50 cm depth. Many plots in the Dalongdong Underground River Watershed show the character of Bidirectional gradient, which means that along with dep.th, CO2 concentration rises at first, but begins to reduce from 40cm deep downwards. In the Mapao-guozhuang Spring Catchment, soil CO2 concentration in the corn fields is higher than that in the potato fields. With vegetation condition improving from grass to shrub and to forest, soil disturbance gets less, the distinctions of CO2 concentration become smaller and the variation scope tends to stable. In every study watersheds, between the same vegetation cover patterns, the less the change in community structure and dominant species, the less variation scope of soil CO2 concentration.关键词
土地利用/覆被变化/岩溶区/土壤CO2Key words
land use/ vegetation cover change/ karst area/ soil CO2分类
农业科技引用本文复制引用
蓝芙宁,王文娟,覃小群,黄奇波,刘朋雨,安树青,唐绍政..土地利用和覆被变化对岩溶区土壤CO2浓度的影响[J].中国岩溶,2011,30(4):449-455,7.基金项目
中国地质调查局地质调查项目(水[2010]矿评03-07-03)、中国地质科学院岩溶地质研究所基本科研业务费项目(2010003)、中国地质科学院岩溶生态系统与石漠化治理重点开放实验室开放基金(KERDC201101) （水[2010]矿评03-07-03）
