| 沙漠-黄土南北样带土壤物理性质区域分异特征 |
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| 引用本文： | 杨岩岩,刘连友,曹恒武,贾振杰.沙漠-黄土南北样带土壤物理性质区域分异特征[J].中国沙漠,2013,33(1):146-152. |
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| 作者姓名： | 杨岩岩 刘连友 曹恒武 贾振杰 |
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| 作者单位： | 北京师范大学 减灾与应急管理研究院, 北京 100875 |
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| 基金项目： | 国家自然科学基金项目(41071331)资助 |
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| 摘 要： | 采集了沙漠-黄土南北样带从北到南的沙漠区、过渡区、黄土区的土壤样品，测量和分析了不同区域土壤容重(D)、粒度特征。结果表明：①D沙漠区>D过渡区>D黄土区，土壤容重的平均值依次为1.53 g·cm-3、1.51 g·cm-3、1.41 g·cm-3，过渡性明显；②沙漠区以中砂和细砂为主，过渡区以细砂为主，黄土区以细砂和粉砂为主。从沙漠区到黄土区，土壤颗粒逐渐变细，粘粒含量增加，分选性变差，偏度均属正偏，且在增大，峰态从常峰态向窄峰态类型变化，过渡区和黄土区属于双峰态，沙漠区属于单峰态。
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| 关 键 词： | 沙漠-黄土过渡区 容重 粒度 |
| 收稿时间： | 2012-06-28; |
| 修稿时间： | 2012-07-27 |
Change of Soil Physical Properties from Desert Area to Loess Area in China |
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| YANG Yan-yan,LIU Lian-you,CAO Heng-wu,JIA Zhen-jie.Change of Soil Physical Properties from Desert Area to Loess Area in China[J].Journal of Desert Research,2013,33(1):146-152. |
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| Authors: | YANG Yan-yan LIU Lian-you CAO Heng-wu JIA Zhen-jie |
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| Institution: | Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing 100875, China |
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| Abstract: | Through collecting the soil samples from desert area, desert-loss transitional area, and loss area, which are located in a meridional desert-loess transition zone in north Loess Plateau, we analyzed the soil bulk density and grain-size. The results showed that: (1) Ddesert>Ddesert-loss>Dloss, and the average soil bulk densities were 1.53 g·cm-3, 1.51 g·cm-3, 1.41 g·cm-3 for the three sub-areas, respectively, which had a transitional trend. (2) Medium and fine sand were higher in the desert area, fine sand was higher in the desert-loess transitional zone, while fine and silty sand were higher in the loess area. From the desert area to the loess area, the soil grain size became smaller; the content of clay particle increased; the sorting gets worse; the skewness belonged to a right skewness but having an increasing trend; the kurtosis changed from mesokurtic to leptokurtic. It was single-kurtosis in the desert area, and it is double-kurtosis in the transitional zone and loess zone. |
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| Keywords: | desert-loess transitional zone soil bulk density grain size |
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