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| 土地利用和覆被变化对岩溶区土壤CO2浓度的影响 | |
| 引用本文： | 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. |
| 作者姓名： | 蓝芙宁 王文娟 覃小群 黄奇波 刘朋雨 安树青 唐绍政 |
| 作者单位： | 1. 南京大学生命科学学院,江苏南京210093;中国地质科学院岩溶地质研究所,广西桂林541004 2. 中国地质科学院岩溶地质研究所,广西桂林541004;广西师范学院环境与资源学院,广西南宁530001 3. 中国地质科学院岩溶地质研究所,广西桂林,541004 4. 南京大学生命科学学院,江苏南京,210093 5. 广西钦州市第二中学,广西钦州,535000 |
| 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) |
| 摘 要： | 通过选择3个具有不同地质背景、气候条件等环境特征的山西汾阳马跑一郭庄岩溶泉域、湖南湘西大龙洞地下河流域、广西桂江流域,对流域内具有代表性的不同土地利用方式和覆被类型下垫面土壤20～50 cm深处CO2浓度进行检测.结果显示,土地利用方式和覆被变化对3个流域岩溶土壤中20 cm、30 cm、40cm和50 cm深处CO2浓度具有明显的影响作用:湖南湘西大龙洞地下河流域多数样地土壤CO2表现为随土层的加深先增加后降低的双向梯度；山西马跑-郭庄泉域玉米地的土壤CO2浓度比种植马铃薯的高,且随着覆被条件由草地→灌丛→林地的改善,土壤的扰动性变小,CO2浓度差趋于减少,变幅趋于稳定.各个流域相同覆被类型,群落结构和优势种变化越小,土壤CO2浓度变幅越小. |
| 关 键 词： | 土地利用 覆被变化 岩溶区 土壤CO2 |
| 收稿时间： | 2011/11/17 0:00:00 |
Impact on soil CO2 concentration by the changes of land use and vegetation cover in karst area |
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| Lan Fu-ning,Wang Wen-juan,Qin Xiao-qun,Huang Qi-bo,Liu Peng-yu,An Shu-qing and Tang Shao-Zheng.Impact on soil CO2 concentration by the changes of land use and vegetation cover in karst area[J].Carsologica Sinica,2011,30(4):449-455. | |
| Authors: | Lan Fu-ning Wang Wen-juan Qin Xiao-qun Huang Qi-bo Liu Peng-yu An Shu-qing and Tang Shao-Zheng |
| Institution: | 1.School of Life Science,Nanjing University,Nanjing,Jiangsu 210093,China; 2.Institute of Karst Geology,CAGS,Guilin,Guangxi 541004,China; 3.Faculty of Resources and Environmental Science,Guangxi Teachers Education University,Nanning,Guangxi 530001,China; 4.Qinzhou Second Middle School,Qinzhou,Guangxi 535000,China) |
| Abstract: | Three watersheds,the Mapao-Guozhuang Spring Catchment in Fenyang,Shanxi Province,the Dalongdong 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 depth,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. |
| Keywords: | land use vegetation cover change karst area soil CO2 |
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