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评估湖南省武陵山片区石漠化集中分布区土壤保持功能对于衡量石漠化生态治理措施的有效性至关重要。本文以土壤保持量作为土壤保持功能的量化指标，采用RUSLE模型计算2000—2020年湖南省武陵山片区土壤保持量的时空变化，并利用地理探测器分析影响土壤保持量变化的主要因子及其贡献度。结果表明：(1)研究期内研究区单位面积平均土壤保持量从4 010.25 t/(km2·a)增至7 895.43 t/(km2·a),并呈现明显的“北高南低”空间分异特征。(2)单因子探测结果显示，坡度影响最大，随着坡度增大，以30°为界土壤保持量呈现“先升后降”变化特征，NDVI、气温和土地利用类型变化的影响较小；多因子交互作用的贡献显著大于单因子贡献。(3)研究区内土壤保持量与降水因子主要呈负相关，特别是在地形起伏大且石漠化严重地区。研究区生态治理建议：在坡度大于30°的区域，应注重保护草地和林地，促进土地生态恢复和土壤保持功能的提高；在坡度25°～30°区域，可采用梯田等农业生产方式。
Abstract：The Wuling Mountains Area in Hunan Province, Central China, is a concentrated distribution area of rocky desertification.Evaluating its soil conservation function is crucial for assessing the effectiveness of ecological management measures in controlling desertification.This study uses soil conservation amount as the quantitative indicator of soil conservation function.Based on the Revised Universal Soil Loss Equation(RUSLE) model, we calculated the spatiotemporal changes in soil conservation amount in the study area from 2000 to 2020.Furthermore, the GeoDetector method was employed to identify the main factors influencing changes in soil conservation and their contributions.The results are shown as follows.(1) From 2000 to 2020,the average soil conservation amount per unit area increased significantly from 4 010.25 t/(km2·a) to 7 895.43 t/(km2·a),exhibiting a distinct spatial pattern of "higher in the north and lower in the south".(2) Single-factor detection revealed that slope had the greatest influence: soil conservation amount increased with slope up to 30° and then decreased thereafter.The influences of NDVI,temperature, and land use change were relatively small.The contribution of multi-factor interactions was substantially greater than that of individual factors.(3) Soil conservation amount was predominantly negatively correlated with precipitation, especially in areas with high topographic relief and severe rocky desertification.Based on these findings, we propose the following ecological management recommendations: for areas with slopes greater than 30°,priority should be given to protecting grassland and forest land to promote ecological restoration and enhance soil conservation function.For areas with slopes between 25°and 30°,special agricultural practices such as terracing can be adopted.
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基本信息:
中图分类号:X171.1
引用信息:
[1]高悦,邹妤阳,庄大春,等.湖南省武陵山片区土壤保持功能时空变化及定量归因[J].地理与地理信息科学,2026,42(03):111-119+141.
基金信息:
高分地球表层系统科学研究应用示范系统项目(30-Y30F06-9003-20/22)
2026-05-25
2026-05-25