[1]刁二龙,曹广超,曹生奎,等.不同尺度下土壤粒径及分形特征[J].水土保持研究,2024,31(05):212-220.[doi:10.13869/j.cnki.rswc.2024.05.015]
　Diao Erlong,Cao Guangchao,Cao Shengkui,et al.Soil Particle Size and Fractal Characteristics at Different Scales[J].Research of Soil and Water Conservation,2024,31(05):212-220.[doi:10.13869/j.cnki.rswc.2024.05.015]
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不同尺度下土壤粒径及分形特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 31 期数: 2024年05期 页码: 212-220 栏目: 出版日期: 2024-08-10
Title:
Soil Particle Size and Fractal Characteristics at Different Scales
文章编号:
1005-3409(2024)05-0212-09
作者:
刁二龙1,2, 曹广超2, 曹生奎1,2, 袁 杰1,2, 童 珊1,2, 邱巡巡1,2
(1.青海师范大学 地理科学学院, 青海省自然地理与环境过程重点实验室, 西宁 810008; 2.青海师范大学 青藏高原地表过程与生态保育教育部重点实验室, 西宁 810008)
Author(s):
Diao Erlong1,2, Cao Guangchao2, Cao Shengkui1,2, Yuan Jie1,2, Tong Shan1,2, Qiu Xunxun1,2
(1.Qinghai Provincial Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Xining 810008, China; 2.Key Laboratory of Qinghai-Tibetan Plateau Land Surface Processes and Ecological Conservation, Ministry of Education, Qinghai Normal University, Xining 810008, China)
关键词:
尺度;  土壤粒径;  分形特征
Keywords:
scale;  soil particle size;  fractal characteristics
分类号:
S152.3
DOI:
10.13869/j.cnki.rswc.2024.05.015
文献标志码:
A
摘要:
[目的]土壤粒径及分形特征因研究尺度不同而存在差异,从不同尺度上探讨土壤粒径及分形特征异质性,以期明确尺度效应对土壤粒径及分形特征的影响。[方法]以黑河源区和八宝河小流域为研究区域,采用单因素方差分析方法对不同尺度土壤粒径及分形维数进行差异显著性检验,利用Pearson相关分析研究不同尺度下土壤分形维数与环境因子的相关性,并使用地理探测器模型探究不同尺度下土壤分形维数环境驱动因素作用。[结果](1)黑河源区和八宝河小流域土壤粒径组成以粉粒和砂粒为主,随着研究尺度扩大到黑河源区,土壤黏粒、粉粒、砂粒和分形维数(D)空间变异性增强,土壤黏粒、粉粒和砂粒属于中等变异,分形维数属于弱变异;(2)不同土地利用类型土壤颗粒组分和分形维数因研究尺度不同而存在差异,与八宝河小流域相比,黑河源区3种土地利用类型土壤PSD频率曲线异质性增大,土壤质地呈粗化趋势;(3)皮尔逊相关分析和地理探测器结果均表明,土壤粒径对分形维数的影响明显大于其他因子,分形维数可以表征土壤质地情况。[结论]不同尺度下土壤粒径及分形维数存在明显的异质性,而这种异质性的产生是不同尺度环境因子综合作用的结果。
Abstract:
[Objective]Soil particle size and fractal characteristics vary depending on the scale of the study. The aims of this study are to explore the heterogeneity of soil particle size and fractal characteristics at different scales, and to clarify the influence of scale effects on soil particle size and fractal characteristics. [Methods]The Heihe River source area and the Babao River basin were taken as the study area. One-way analysis of variance(ANOVA)was utilized to test the significance of differences in soil particle size and fractal dimension at different scales. Pearson correlation analysis was conducted to investigate the correlation between soil fractal dimension and environmental factors at different scales. geographical detector modeling was employed to explore the impact of environmental drivers of soil fractal dimension at different scales. [Results](1)In the Heihe River source area and the Babao River basin, the soil particle sizes were predominantly silt and sand. As the study scale expanded to the Heihe River source area, the spatial variability of soil clay, silt, sand, and fractal dimension(D)increased. Soil clay, silt, and sand exhibited moderate variation, whereas D showed weak variation.(2)There were variations in soil particle composition and distribution in different land use types, which was influenced by different research scales. When compared to the Babao River small watershed, the heterogeneity of soil particle size distribution(PSD)frequency curves in the Heihe River source area was higher across three land use types, indicating a trend towards coarser soil texture.(3)Both Pearson correlation analysis and geographical detector results indicated that soil particle size had a significantly greater influence on D compared to other factors, and D could effectively characterize soil texture. [Conclusion]There is clear heterogeneity in soil particle size and fractal dimension at different scales, which is influenced by a comprehensive action of environmental factors at different scales.

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备注/Memo

收稿日期:2023-07-10 修回日期:2023-10-18
资助项目:青海省科技厅自然科学基金“祁连山国家公园青海片区典型流域土壤水文调蓄功能研究”(2021-ZJ-937Q)
第一作者:刁二龙(1991—),男,山西大同人,在读博士,研究方向:环境地表过程与生态响应。E-mail:1530875132@qq.com
通信作者:曹广超(1971—),男,山东苍山人,博士,教授,研究方向:环境变化与地理信息系统应用研究。E-mail:Caoguangchao@qhnu.edu.cn

更新日期/Last Update: 2024-08-10