中国水土保持科学2026，Vol.24Issue(2)：62-70,9.DOI:10.16843/j.sswc.2025162
湘西南紫色土区小流域水土保持综合治理碳汇能力监测与评价
Monitoring and evaluation of carbon sink capacity of comprehensive soil and water conservation measures in small watersheds in purple soil region of southwestern Hunan province
摘要
Abstract
[Objective]Monitoring and evaluating carbon sink in small watersheds of the purple soil region in southwestern Hunan Province provides techniques and methods for assessing the carbon sink capacity of soil and water conservation projects,and offers a reference for carbon sink research in soil and water conservation in the purple soil region of southwestern Hunan.[Methods]Through field sampling of 30 plots,soil bulk density and organic carbon content were measured,and the diameter at breast height of each tree was recorded.The vegetation carbon pool,soil carbon pool,and soil and carbon retention in the small watershed from 2004 to 2024 were analyzed and quantified.[Results]1)After 20 years of comprehensive management,the average annual increase in carbon storage in the Huangniqiao and Sipingxi small watersheds of Cili County was 4.46 × 103 t/a.2)Compared with the baseline scenario,soil carbon storage under the project scenario increased by 11.89％,and vegetation carbon storage increased by 54 078.62％.The soil and carbon retention amount in the project area reached 52.54 t.3)Different soil and water conservation measures,including exclosure management,afforestation of soil and water conservation forests,and slope-to-terrace projects,varied in their capacity to enhance carbon sink.Specifically,exclosure management of Phyllostachys edulis and Bambusa spp.stands demonstrated the most significant enhancement in soil carbon sink.Meanwhile,afforestation of soil and water conservation forests with P.elliottii had the highest vegetation carbon sink density.The slope-to-terrace project was of great significance for soil protection and erosion reduction.[Conclusions]Various soil and water conservation measures demonstrate significant effects in carbon preservation,carbon sequestration,and carbon sink enhancement.Among them,afforested areas with species such as P.elliottii,Pinus massoniana,and Cunninghamia lanceolata effectively improve the overall benefits of comprehensive soil and water conservation management.关键词
水土保持/碳汇能力/监测评价/小流域/西南紫色土区Key words
soil and water conservation/carbon sink capacity/monitoring and evaluation/small watershed/southwestern purple soil region分类
农业科技引用本文复制引用
陈志,李玉婷,唐若晗,左双苗,马江山,王勇,谭艳玲..湘西南紫色土区小流域水土保持综合治理碳汇能力监测与评价[J].中国水土保持科学,2026,24(2):62-70,9.基金项目
湖南省水利厅科技项目"湖南省小流域综合治理项目碳汇核算方法和价值实现机制研究"(XSKJ2024064-21),"涟源市水土保持科技示范园综合治理项目碳汇核算方法和价值实现机制研究"(XSKJ2025056-69) Scientific Research Project of Hunan Provincial Department of Water Resources"Study on Carbon Sink Accounting Methods and Value Realization Mechanisms for Comprehensive Management of Small Watersheds in Hunan Province"(XSKJ2024064-21),"Study on Carbon Sink Accounting Methods and Value Realization Mechanisms for Comprehensive Management of the Soil and Water Conservation Science and Technology Demonstration Park in Lianyuan City"(XSKJ2025056-69) （XSKJ2024064-21）
