干旱区地理2026，Vol.49Issue(1)：56-68,13.DOI:10.12118/j.issn.1000-6060.2025.201
新疆表层土壤粒径分形特征及驱动因素分析
Fractal characteristics and driving factors of soil particle size in the surface layer of Xinjiang
摘要
Abstract
Xinjiang,an ecologically fragile region in China that is prone to aeolian desertification,has a surface-soil particle composition that plays a critical role in regional ecosystem stability.This study analyzed the particle composition of surface soils collected from 180 sampling points across 60 plots in Xinjiang,China.Using the aridity index,sampling sites were classified into semi-arid,arid,and hyper-arid plots to examine the fractal char-acteristics of soil particle-size distributions across drought gradients and to assess how environmental factors in-fluence these fractal properties in surface soils.The results demonstrated that(1)With increasing aridity,the sur-face-soil particle-size distribution became progressively coarser and showed clear transitional features.Semi-arid and arid plots were dominated by silt,whereas hyper-arid plots were dominated by sand,with very fine and fine sand together accounting for 53.48%.(2)Overall,the soils exhibited poor sorting.Particle dispersion decreased with increasing aridity,resulting in progressively narrower size distributions,and the fractal dimensions ranged from 1.98 to 2.47.(3)The fractal dimension was strongly influenced by clay content,showing positive correla-tions with clay and silt and a significant negative correlation with sand.Furthermore,the model-fitting perfor-mance of the fractal dimension in plots under different aridity gradients followed the order:hyper-arid>arid>semi-arid.(4)The factor detector results indicated that mean annual precipitation(MAP),mean annual temperature(MAT),soil type,and parent material had strong explanatory power for the soil fractal dimension.Structural equa-tion modeling further showed that,among the continuous variables examined,climatic factors had a significant in-fluence on the surface-soil fractal dimension in Xinjiang.Specifically,MAP and wind speed exerted positive ef-fects,whereas MAT had a negative effect.This research provides a scientific basis for regional soil use and eco-logical management,supporting soil and water conservation,vegetation restoration,and ecosystem stability in Xinjiang.关键词
分形维数/粒径分布/土壤质地/驱动因素/新疆Key words
fractal dimension/particle size distribution/soil texture/driving factors/Xinjiang引用本文复制引用
刘全渝,刘馨璐,李桂真,李从娟..新疆表层土壤粒径分形特征及驱动因素分析[J].干旱区地理,2026,49(1):56-68,13.基金项目
新疆维吾尔自治区"天山英才"(2022TSYCCX0004,2022TSYCJC0005) （2022TSYCCX0004,2022TSYCJC0005）
新疆维吾尔自治区"天山创新团队"(2024D14014) （2024D14014）
新疆维吾尔自治区杰出青年基金(2022D01E97) （2022D01E97）
新疆维吾尔自治区重点研发计划(2022B03030)资助 （2022B03030）
