陇中黄土丘陵区滑坡体在不同生态恢复措施下的土壤特征

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关键词：生态恢复措施；土壤理化性质；粒径分布；单重分形维数；滑坡中图分类号：S154.1 文献标识码：A 文章编号：1007-0435（2026）04-1302-11

Abstract：The mechanism of the influence of vegetation restoration on soil characteristics in the loess hilly landslide area is unclear，in this study we selected the typical landslide area in the loess hilly and gully region ofcentral Gansu in the upper reaches of the Yelow River as the experimental site.Through field sampling and indoor analysis，combined with fractaltheory，the diferences insoilparticle size characteristics and physical and chemi cal properties under three ecological restoration measures，namely natural restoration，honeysuckle planting， and cor planting，were compared. The results showed that：（1） Under diffrent ecological restoration measures， the composition of soil particles was mainly composed of sand grains （ 34%～37% ），fine sand grains （2号 （27%-28%） . （2） Compared with natural restoration，the pH in the honeysuckle area decreased significantly， and the moisture content in the corn area increased significantly.The contents ofsoil organic matter，total nitrogen and total phosphorus in artificial restoration were allhigher than those in natural restoration.（3）The range of the single fractal dimension was 2.44 to 2.72，specifically corn （2.72）> honeysuckle （2.65）> natural recovery（2.44），and the recovery ofcorn leads to better soil quality. Under diferent ecological restorations， the single fractal dimension of soil showed an increasing trend as the soil texture changes from coarse to fine. The nutrient content and moisture content of soil restored artificially were higher than those restored naturally， that was，artificial restoration measures were more conducive to enhancing the soil's water retention capacity and nutrient fixation capacity. The study shows that in the process of landslide control，appropriately adopting auxiliary measures of artificial restoration can efectively improve soil structure，increase vegetation coverage of the landslide site，and reduce soil erosion.

Key words：Ecological restoration measures; Soil physicochemical properties; Particle size distribution; Fractal dimension;Landslides

陇中黄土丘陵区位于黄河中上游地区，在气候变化和人类活动干扰加剧的背景下，土壤侵蚀严重，属于极易受到干扰的脆弱生态系统，因此成为我国生态工程重点实施区域之一[1.2]。（剩余24438字）