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为了探明阿拉山口大风对地表土壤粒度分布的影响,本文选取阿拉山口风向影响下的阿拉山口地区(A区域),博河、精河下游河岸带(B区域),阿奇克苏河下游河岸带(C区域)作为研究区,三个区域的表层土壤作为研究对象,以艾比湖湿地表层土壤粒度测试实验为基础,分析土壤粒度及空间分布的特征。平均粒径结果表明:阿拉山口区、博河,精河下游河岸带、阿奇克苏河下游河岸带粒径分别为101.49μm、77.54μm、49.82μm;偏度特征为:三个区域的偏度均值结果显示为正偏态,分别为为4.01(阿拉山口区域)、3.71(博、精河区域)、2.77(阿其克苏河区域)。土壤质地分级结果为:阿拉山口区土壤质地以粗砂为主,博河,精河下游河岸带以沙砾和粉砂为主,阿奇克苏河下游河岸带以粉砂为主。上述结果定量地揭示了阿拉山口常年的风力侵蚀作用及其人类活动对该区域表层土壤粒度的影响。
In order to find out the influence of the Alashankou gale on the particle size distribution of the surface soil, this paper chooses the Alashankou area (A area), the Bohe River, the downstream river bank (B area) under the influence of the Alashankou wind direction, (C area) as the study area and the topsoil of the three areas as the research object. Based on the experiment of surface soil particle size test in the Aibi Lake wetland, the characteristics of soil particle size and spatial distribution were analyzed. The results of average grain size showed that the grain sizes of Alashankou area, Bohe, Jinghe lower riparian zone and Aqikesu River were 101.49μm, 77.54μm and 49.82μm, respectively. The skewness characteristics were as follows: The mean-value results showed positive skewness of 4.01 (Alashankou area), 3.71 (Bo, Jinghe area), and 2.77 (Acideus su River area) respectively. Soil grading results are as follows: The soil texture in the Alashankou area is dominated by coarse sand, while in the lower reaches of Bohe and Jinghe, gravel and silt are dominant, while the lower reaches of the Aikekesu River is dominated by silt. The above results quantitatively revealed the perennial wind erosion in the Alashankou and the impact of human activities on the surface soil particle size in the area.