| 喀斯特浅层裂隙土壤垂向渗透性及影响因素 |
| |
| 引用本文： | 李焱秋,戴全厚,任青青,朱列坤,岑龙沛,兰雪,伏文兵.喀斯特浅层裂隙土壤垂向渗透性及影响因素[J].水土保持学报,2020,34(3):150-155. |
| |
| 作者姓名： | 李焱秋 戴全厚 任青青 朱列坤 岑龙沛 兰雪 伏文兵 |
| |
| 作者单位： | 1. 贵州大学林学院, 贵阳 550025;2. 贵州大学土壤侵蚀与生态修复研究中心, 贵阳 550025;3. 山地植物资源保护与种质创新教育部重点实验室, 贵阳 550025;4山地生态与农业生物工程协同创新中心, 贵阳 550025;5. 贵州师范大学地理与环境科学学院, 贵阳 550025;6. 贵州华保环境技术咨询有限公司, 贵阳 550025 |
| |
| 基金项目： | 国家自然科学基金项目（41671275）；国家重点研发计划项目（2016YFC0502604）；贵州省高层次创新型人才项目（黔科合平台人才[2018]5641）；贵州省重大专项（黔科合重大专项字[2016]3022号）；贵州省科技计划项目（黔科合平台人才[2017]5788）；贵州省科学技术基金项目（黔科合LH字[2014]7060号） |
| |
| 摘 要： | 为探究喀斯特浅层裂隙所赋存土壤各土层渗透性特征及影响因素,测定了喀斯特典型的浅层裂隙中赋存土壤0—10,10—20,20—30,30—50,50—70,70—100 cm土层的饱和导水率、机械组成、容重、非毛管孔隙度、毛管孔隙度、总孔隙度和有机碳含量等土壤属性。结果表明:(1)喀斯特浅层裂隙中各土壤属性均随着土层深度变化呈现出递增或递减的趋势,其中容重、黏粒含量、毛管孔隙度均随着土层深度而增长,饱和导水率、有机碳、非毛管孔隙度等土壤属性随土层深度的变化规律相反,呈递减趋势。(2)喀斯特浅层裂隙中土壤饱和导水率变异系数高于非喀斯特地区,且随土层深度变化呈波动增长趋势;其随土层深度变深而减小的趋势可用对数函数进行模拟(R^2=0.9462)。(3)通过Pearson相关性分析,裂隙中所赋存土壤的饱和导水率除了与机械组成中黏粒含量、粉粒含量为显著性相关(P<0.05),与砂粒含量相关性不显著以外(P>0.05),与其余各土壤属性均呈极显著性相关(P<0.01),且非毛管孔隙度相关性最高(P=0.898)。浅层裂隙土壤非毛管孔隙是影响其渗透性的主要因子,而裂隙中深层土壤拥有较多善于贮存植物所需水分的毛管孔隙。因此,对于土地资源匮乏的喀斯特地区,充分合理利用裂隙中深层土壤的水分成为今后研究的重点。研究结果可为喀斯特地区水分运移、石漠化治理及植被恢复提供科学依据。
|
| 关 键 词： | 喀斯特 裂隙 渗透性 土壤属性 相关性分析 |
| 收稿时间： | 2019/10/11 0:00:00 |
| 修稿时间： | 2019/11/23 0:00:00 |
Vertical Permeability of Karst Shallow Fissure and Its Influencing Factors |
| |
| LI Yanqiu,DAI Quanhou,REN Qingqing,ZHU Liekun,CEN Longpei,LAN Xue,FU Wenbing.Vertical Permeability of Karst Shallow Fissure and Its Influencing Factors[J].Journal of Soil and Water Conservation,2020,34(3):150-155. |
| |
| Authors: | LI Yanqiu DAI Quanhou REN Qingqing ZHU Liekun CEN Longpei LAN Xue FU Wenbing |
| |
| Institution: | 1. College of Forestry, Guizhou University, Guiyang 550025;2. Research Center for Soil Erosion and Ecological Restoration, Guiyang 550025;3. Key Laboratory of Mountain Plant Resources Conservation and Germplasm Innovation, Ministry of Education, Guiyang 550025;4. Collaborative Innovation Center of Mountain Ecology and Agricultural Bioengineering, Guiyang 550025;5. School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025;6. Guizhou Huabao Environmental Technology Consulting Co., Ltd., Guiyang 550025 |
| |
| Abstract: | By measuring the saturated hydraulic conductivity, mechanical composition, bulk density, non-capillary porosity, capillary porosity, total porosity, organic carbon content and other soil properties of karst shallow fissure soil (0-10, 10-20, 20-30, 30-50, 50-70, 70-100 cm), the permeability characteristics and influencing factors of various soil layers in Karst shallow fissures were studied. The results show that: (1) Soil properties in Karst shallow fissures show an increasing or decreasing trend with the change of soil depth, in which bulk density, clay content and capillary porosity increase with the depth of the soil layer, while other soil properties such as saturated hydraulic conductivity, organic carbon and non-capillary porosity change with the depth of the soil layer. (2) The coefficient of variation of saturated hydraulic conductivity of soil, which is higher than that of non-karst area, and it increases with the fluctuation of soil layer. At the same time, the trend of decreasing with the depth of soil layer can be simulated by logarithmic function (R2=0.9462). (3) Pearson correlation analysis showed that the saturated hydraulic conductivity of the soil in the fissures was significantly correlated with the clay content and silt content in the mechanical composition (r < 0.05), but not with the sand content (r > 0.05), and was significantly correlated with other soil properties (r < 0.01), and the non-capillary porosity had the highest correlation (P = 0.90). Non-capillary pore of shallow fissured soil is the main factor affecting its permeability, and deep fissured soil has more capillary pore which is good at storing water needed by plants. Therefore, in karst areas where land resources are scarce, it is the focus of future research to make full and rational use of water distribution in deep soil of fissures. The results of this study can provide scientific basis for water transport, rocky desertification control and vegetation restoration in Karst areas. |
| |
| Keywords: | Karst fissure permeability soil properties correlation analysis |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《水土保持学报》浏览原始摘要信息 |
| 点击此处可从《水土保持学报》下载免费的PDF全文 |
|
