广西科学院学报2026，Vol.42Issue(2)：156-166,11.DOI:10.13657/j.cnki.gxkxyxb.20260819.004
基于土地利用的广西石漠化治理重点区土壤碳储量动态变化及驱动因素分析
Dynamics and Driving Factors of Soil Carbon Stocks in Key Rocky Desertification Control Areas of Guangxi Based on Land Use
摘要
Abstract
Soil carbon pools are the largest carbon reservoir in terrestrial ecosystems and play a critical role in maintaining ecosystem carbon stability and ecological balance.In this study,the key areas of rocky desertifica-tion control in Guangxi were taken as the object,and the land use data in 2010 and 2020 were used to analyze the characteristics of land use change,spatial and temporal changes of soil carbon storage and their driving factors in the study area by means of Geographic Information System(GIS)spatial analysis,InVEST model and optimal parameters-based geographical detector.The results showed that:①Forest land and cultivated land were the dominant land use types in the study area from 2010 to 2020.Positive outcomes were achieved through comprehensive ecological management,with forest land and shrubland increasing by 6×105 hm2 and 5×105 hm2,respectively.The increased forest land was primarily derived from the conversion of other forest land and grass land.Meanwhile,urbanization progressed markedly,with construction land expanding by 1.09×105 hm2,mainly at the expense of other forest land and paddy fields.②During the study period,the soil carbon storage in the key areas of rocky desertification control in Guangxi showed an upward trend,with an increase of 5.64％in 2020 compared with 2010,showing a distribution pattern of"higher in northwest and northeast and lower in southwest".③The spatial differentiation of soil carbon storage was influenced by both natural factors and anthropogenic activities.Among the single factors,slope,elevation and population density were the core driving factors,among which slope was always the most influential factor(q values in 2010 and 2020 were 0.262 4 and 0.243 4,respectively).The multi-factor interaction was dominated by the enhance-ment effect.The q value of"net primary productivity ∩ precipitation"was the highest in 2010(0.426 9),and the q value of"population density ∩ temperature"was the highest in 2020(0.396 5).Based on the above results,it is suggested to strengthen forest land protection and ecological space management,and promote ec-ological management according to local conditions.关键词
土地利用变化/土壤碳储量/InVEST模型/最优参数地理探测器/广西石漠化治理重点区Key words
land use change/soil carbon stock/InVEST model/optimal parameters-based geographical detec-tor/key rocky desertification control areas in Guangxi分类
资源环境引用本文复制引用
杨祖,文娟,韦兰英,莫欣雨,梁玉莲..基于土地利用的广西石漠化治理重点区土壤碳储量动态变化及驱动因素分析[J].广西科学院学报,2026,42(2):156-166,11.基金项目
广西重点研发计划项目(桂科 AB25069153)和广西林业科技推广示范项目(2023GXLK31,2023GXLK34)资助. （桂科 AB25069153）
