干旱区研究2025，Vol.42Issue(9)：1691-1702,12.DOI:10.13866/j.azr.2025.09.13
我国原生与恢复草原固碳能力的差异及驱动力
Different and driving factors of carbon sequestration capacity in primary and restored grasslands in China
摘要
Abstract
Net primary productivity(NPP)is an important indicator that reflects grassland growth and characteriz-es grassland carbon sequestration capacity.This article considers four provinces in northern China as research ar-eas.Based on multisource data,such as NPP;terrain and land types;and socioeconomic and meteorological fac-tors,the study analyzes spatiotemporal changes in the carbon sequestration capacity of primary and restored grass-lands,explores key driving forces for improving their carbon sequestration capacity,and provides reference for China in formulating targeted grassland ecological policies.The results demonstrated that the carbon sequestra-tion capacity of restored grasslands is approximately 80％higher than that of pristine grasslands.The spatial ag-gregation variation of carbon sequestration in pristine grasslands(ranging from 0.534 to 0.653)is slightly narrow-er than that in restored grasslands(ranging from 0.511 to 0.736).Rainfall,sunshine duration,and policies related to ecological conservation zones are common driving forces that enhance carbon sequestration in both types.The optimal conditions for enhancing carbon sequestration in grasslands are rainfall that reach 600 mm and annual sunshine duration that exceed 3000 h.Temperatures more than 8 ℃ are conducive to carbon sequestration in pris-tine grasslands,while the optimal area for restored grasslands ranges from 100 to 200 km2.Meteorological factors were the primary driving forces prior to the implementation of restoration policies;subsequently,however,the in-fluence of policies began to intensify.The relevant departments should continue to formulate effective ecological restoration policies to help China achieve its dual carbon strategic goals as soon as possible.关键词
干旱地区/原生草原/恢复草原/固碳能力/随机森林Key words
arid regions/primary grasslands/restoration grasslands/carbon sequestration capability/random forest引用本文复制引用
刘晗,龚亚珍,贾册,刘士磊..我国原生与恢复草原固碳能力的差异及驱动力[J].干旱区研究,2025,42(9):1691-1702,12.基金项目
国家自然科学基金青年项目(42207543) （42207543）
中国人民大学新教师启动金项目(22XNKJ26) （22XNKJ26）
