妫水河流域土壤斥水性分布与影响因素研究

发布时间：2018-03-20 14:09

本文选题：妫水河流域　切入点：土壤斥水性　出处：《农业机械学报》2017年10期 　论文类型：期刊论文

【摘要】：为了研究我国北方土石山区流域土壤斥水性影响因素及其分布规律,以妫水河流域为例开展了野外调查和室内研究。对流域内9种植被类型共385个土壤样本的滴水穿透时间(Water drop penetration time,WDPT)与土壤有机质含量、p H值、质量分形维数、土壤颗粒比表面积进行统计分析。研究表明:WDPT由大到小依次为有林地、灌木林、疏林地、果园、高覆盖度草地、旱地、中覆盖度草地、低覆盖度草地、滩地。有林地和灌木林为强烈斥水性,疏林地和果园为轻微斥水性,高覆盖度草地无斥水性,旱地、中覆盖度草地、低覆盖度草地和滩地为亲水性;土壤斥水性在流域的空间分布上表现为西北部、东北部和东南部山区斥水性较大,中部盆地斥水性较小;在垂向分布上表现为表层最大、中层次之、深层最小;WDPT与土壤有机质含量呈正相关性,与p H值、质量分形维数、土壤颗粒比表面积呈负相关性;土壤p H值和有机质含量是斥水性的主要影响因素,质量分形维数、土壤颗粒比表面积是次要因素。
[Abstract]:In order to study the soil rock area of northern China and its influence factors of water repellency distribution in Guishui River Basin as an example to carry out the field investigation and laboratory research of the basin. 9 vegetation types were 385 soil samples of the water drop penetration time (Water drop penetration time, WDPT) and the content of soil organic matter, p the value of H, the quality of the fractal dimension of soil particle surface area were analyzed. The study shows that WDPT from large to small in turn into woodland, shrub forest, woodland, orchard, dry land, high coverage grassland, moderate coverage grassland, low coverage grassland, bottomland woodland and shrubbery. Strongly denounced the water, woodland and orchard for slight water repellency, high coverage grassland without water repellency, dry land, moderate coverage grassland, low coverage grassland and floodplain is hydrophilic; soil water repellent spatial distribution in the basin on the performance of the northwest, northeast and Southeast Mountain water repellency is larger, the central basin of water repellency is smaller; in the vertical distribution showed the largest surface, the level of the deep minimum; the correlation between WDPT and soil organic matter content was p and H value, the quality of the fractal dimension of soil particle surface area was negatively correlated; soil organic matter and H value p the content is the main influencing factors of water repellency, the quality of the fractal dimension of soil particle surface area is a secondary factor.

【作者单位】：中国水利水电科学研究院水资源研究所;南昌工程学院水利与生态工程学院;
【基金】：流域水循环模拟与调控国家重点实验室项目(2015ZY01、2016ZY01) 国家重点研发计划项目(2016YFC0401407) 国家重点基础研究发展计划(973计划)项目(2015CB452701)
【分类号】：S152.7

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