| 黄土高原退耕坡地土壤水分空间变异性研究 |
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| 引用本文： | 胡伟,邵明安,王全九. 黄土高原退耕坡地土壤水分空间变异性研究[J]. 水科学进展, 2006, 17(1): 74-81 |
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| 作者姓名： | 胡伟 邵明安 王全九 |
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| 作者单位： | 中国科学院水土保持与生态环境研究中心黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;中国科学院研究生院,北京,100039;中国科学院水土保持与生态环境研究中心黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;中国科学院地理科学与资源研究所,北京,100101;中国科学院水土保持与生态环境研究中心黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 中国科学院"百人计划";中国科学院资助项目;国家重点实验室基金;中国科学院水利部水土保持研究所资助项目 |
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| 摘 要： | 以神木生态观测站为例,利用经典统计学方法对黄土高原退耕坡地土壤水分在空间三维不同方向和不同位置的空间变异性进行了研究,并对空间变异的尺度和时间依赖性等问题进行了探讨,以便为坡地水分管理和植被恢复提供参考。研究结果表明土壤水分在垂直方向和水平方向(垂直于坡长方向)的平均变异程度为弱变异;而在东西方向(坡长方向)、二维平面和三维空间上为中等变异性;土壤水分沿坡长方向从坡顶到坡脚表现出先减小后增大的趋势,且在各坡位变异程度不一,呈现出变异程度为坡上>坡中>坡下的趋势;土壤水分沿南北方向表现为阴坡>山脊>阳坡的明显趋势,其变异程度为阳坡>阴坡;在40~200 cm土层深度内,土壤水分在垂直方向表现出先减小后增大的趋势,且在各土层的变异程度与各层平均土壤水分成明显的正相关。
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| 关 键 词： | 黄土坡面 土壤水分 空间变异 黄土高原 |
| 文章编号： | 1001-6791（2006）01-0074-08 |
| 收稿时间： | 2004-08-16 |
| 修稿时间： | 2004-10-30 |
Study on spatial variability of soil moisture on the recultivated slope-land on the Loess Plateau |
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| HU Wei,SHAO Ming-an,WANG Quan-jiu. Study on spatial variability of soil moisture on the recultivated slope-land on the Loess Plateau[J]. Advances in Water Science, 2006, 17(1): 74-81 |
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| Authors: | HU Wei SHAO Ming-an WANG Quan-jiu |
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| Affiliation: | 1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Research Center of Soil and Water Conservation and Ecological Environment, CAS, Yangling 712100, China;2.Graduate School of Chinese Academy of Sciences, Beijing 100039, China;3.Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, China |
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| Abstract: | In order to provide some recommendation for the water management and the vegetation restoration on slope-lands,the study on the spatial variability of the soil moisture in different directions and positions on the recultivated slope-land on the Loess Plateau is carried out at the Shenmu ecological station both by the field measurements and the statistical analysis.In this paper,some key issues related to the spatial variability such as scale and time-dependence are discussed.The results show that the mean variation of the soil moisture is weak along the vertical and the N-S direction(perpendicular to slope),while it is moderate when the E-W direction,2-D and 3-D space are considered.Along the slope,the soil moisture decreases and then increases from its top to the bottom,and the sequence of the magnitude of the heterogeneity is the top-slope > the mid-slope > the bottom-slope;in the N-S direction,the soil moisture increases from the sunshine slope to the shadow slope,and the magnitude of the heterogeneity of the sunshine slope is larger than that of the shadow slope;in the vertical direction,the soil moisture decreases and then increases below the depth of 200cm from the soil surface,and the magnitude of the heterogeneity is significantly positive correlated to the mean moisture of the same soil layer. |
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| Keywords: | loess slope-land soil moisture spatial variability Loess Plateau |
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