In order to explore the changing trend and response mechanism of karst carbon sinks under the background of climate change and rocky desertification control engineering, this paper estimates the temporal and spatial pattern of karst carbon sinks in Guangxi from 2005 to 2020 based on Guangxi lithologic geological data and meteorological data, and further The effects of climate change and rocky desertification control on karst carbon sinks are analyzed. The results show that from 2005 to 2020, the temporal and spatial differences of karst carbon sinks in Guangxi are significant, showing a trend of stable fluctuation and rising with an average annual increase of 8.1%. Precipitation has the most significant impact on the changes of karst carbon sinks while temperature and evapotranspiration have little effect. The responses to the control measures are different. As the most common control measures for rocky desertification, closing the mountain for management and protection has the most significant role in promoting carbon sequestration and increasing sinking with an average annual growth contribution rate of about 28%. 

为探讨气候变化和石漠化治理工程背景下岩溶碳汇的变化趋势和响应机制, 基于广西岩性地质数据和气象数据, 利用模型估算2005—2020年间广西岩溶碳汇的时空格局, 并分析气候变化和石漠化治理对岩溶碳汇的影响。结果表明, 广西2005—2020年岩溶碳汇时空差异显著, 呈现波动上升的趋势, 年均增加8.1%; 降水对岩溶碳汇变化的影响最显著, 温度和蒸散发量的影响较小; 岩溶碳汇对不同石漠化治理措施的响应有所不同, 封山管护这种最普遍的石漠化治理措施对固碳增汇的促进作用最显著, 年均增长贡献率约为28%。