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| 黄土区不同土地利用方式坡面土壤含水率的空间变异性研究 | |
| 引用本文： | 王云强,张兴昌,从伟,魏清才. 黄土区不同土地利用方式坡面土壤含水率的空间变异性研究[J]. 农业工程学报, 2006, 22(12): 65-71 |
| 作者姓名： | 王云强 张兴昌 从伟 魏清才 |
| 作者单位： | 1. 中国科学院水土保持与生态环境研究中心,西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,杨凌,712100中国科学院研究生院,北京,100039 2. 中国科学院水土保持与生态环境研究中心,西北农林科技大学水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,杨凌,712100 3. 西北农林科技大学资源与环境学院,杨凌,712100 |
| 基金项目： | 西北农林科技大学科研创新团队项目;青年学术骨干和研究生教育创新支持计划项目;国家自然科学基金 |
| 摘 要： | 为掌握不同土地利用方式下坡面土壤含水率的空间分布特征及其变异规律，利用经典统计学方法对黄土高原水蚀风蚀交错带草地和农地坡面土壤含水率的空间变异性进行了对比研究。结果表明：草地和农地的土壤含水率均值在同一土层深度下差异极显著，但二者在垂直方向、坡长方向的变异程度均为中等变异程度；草地和农地坡面土壤含水率的垂直变化特征不同，前者为降低型，后者在100 cm以上为波动型，以下为稳定型；草地和农地坡面土壤含水率均随坡长的增加呈波浪式变化规律，整体上有增加趋势；将坡面划分为5个坡长或将土层划分为4层以后，草地和农地坡面土壤含水率沿垂直方向、坡长方向的总体变化趋势均没有改变，但由于尺度的扩展获得了一些较大尺度上的水分信息。 |
| 关 键 词： | 土地利用 坡面 土壤含水率 空间变异性 |
| 文章编号： | 1002-6819(2006)12-0065-07 |
| 收稿时间： | 2006-03-01 |
| 修稿时间： | 2006-07-31 |
Spatial variability of soil moisture on slope-land under different land uses on the Loess Plateau |
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| Wang Yunqiang,Zhang Xingchang,Cong Wei and Wei Qingcai. Spatial variability of soil moisture on slope-land under different land uses on the Loess Plateau[J]. Transactions of the Chinese Society of Agricultural Engineering, 2006, 22(12): 65-71 | |
| Authors: | Wang Yunqiang Zhang Xingchang Cong Wei Wei Qingcai |
| Affiliation: | State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences & Ministry of Education, Institute of Soil and Water Conservation, North;State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences & Ministry of Education, Institute of Soil and Water Conservation, North;College of Resources and Environment, Northwest Sci-tech University of Agriculture and Forestry, Yangling 712100, China;College of Resources and Environment, Northwest Sci-tech University of Agriculture and Forestry, Yangling 712100, China |
| Abstract: | To understand the spatial patterns of soil moisture in different land uses,spatial variability of soil moisture of grassland and cropland slope were comparatively studied by means of statistics in the wind-water(erosion) crisscross region on the Loess Plateau.Results show that the differences of average soil moisture in the same layers between grassland and cropland are significant at the 0.01 level,but they have the same variable(extent) in profile and slope length direction,respectively.The profile change of soil moisture of grassland is different from that of cropland,the former was decreasing,while the latter was fluctuant(0~100 cm) and stable(100~200 cm),respectively.The soil moisture strongly fluctuated with the increase of slope length for grassland and cropland.At different slope lengths and soil layers,the soil moisture has the same change trend at profile and slope length direction,and the increase of scale could obtain more information about soil moisture at larger scale. |
| Keywords: | land use slope soil moisture spatial variability |
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