黄土高原区域尺度土壤干燥化的空间和季节分布特征
为掌握黄土高原土壤干燥化程度的空间分布特征,定量评价雨季前、后土壤干燥化程度,于2013年在黄土高原南北方向布设一条样带(N=86),获取雨季前、后0~5 m剖面土壤含水量。采用地统计学方法分析了土壤干燥化指数的空间分布规律及变异特征。结果表明:在黄土高原地区,土壤干燥化程度存在明显的纬度地带性,且雨季前土壤干燥化指数的空间变异程度高于雨季后;经过雨季降水的补给,土壤干层在一定程度上得到修复,且中部地区的修复效果明显优于南部及北部地区;土壤干燥化指数剖面分布特征在雨季前、后的差异主要表现在浅层0~2.3 m土层,这主要归因于降水对浅层土壤水分的补给。...
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Published in | 水科学进展 Vol. 28; no. 3; pp. 373 - 381 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
西北农林科技大学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%西北农林科技大学资源环境学院,陕西杨凌 712100
2017
中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京 100101 西北农林科技大学资源环境学院,陕西杨凌,712100%中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京 100101 |
Subjects | |
Online Access | Get full text |
ISSN | 1001-6791 |
DOI | 10.14042/j.cnki.32.1309.2017.03.007 |
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Summary: | 为掌握黄土高原土壤干燥化程度的空间分布特征,定量评价雨季前、后土壤干燥化程度,于2013年在黄土高原南北方向布设一条样带(N=86),获取雨季前、后0~5 m剖面土壤含水量。采用地统计学方法分析了土壤干燥化指数的空间分布规律及变异特征。结果表明:在黄土高原地区,土壤干燥化程度存在明显的纬度地带性,且雨季前土壤干燥化指数的空间变异程度高于雨季后;经过雨季降水的补给,土壤干层在一定程度上得到修复,且中部地区的修复效果明显优于南部及北部地区;土壤干燥化指数剖面分布特征在雨季前、后的差异主要表现在浅层0~2.3 m土层,这主要归因于降水对浅层土壤水分的补给。 |
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Bibliography: | This study was to understand the spatial distribution characteristics of soil desiccation and quantitatively e- valuate the soil desiccation conditions within different seasons on the Chinese Loess Plateau. For this purpose, soil wa- ter contents of the 0--5 m profile were measured before and after the rainy season in 2013, respectively, along a re- gional transect (N = 86) established from the south to the north. The spatial distribution and variation characteristics of soil desiccation index (IsD) were analyzed using the geostatistical method. Results showed that the spatial pattern of soil desiccation had an obvious latitudinal zonality in the region. The spatial variability of /SD before rainy season was higher than that after rainy season. Dried soil layers were recovered to some extent after supplementation of precipitati- on after the rainy season. The degree of the recovery was higher in the central part of the region than that of the south and north areas. Furthermore, the difference of IsD distribut |
ISSN: | 1001-6791 |
DOI: | 10.14042/j.cnki.32.1309.2017.03.007 |