干旱区地理2025，Vol.48Issue(9)：1612-1622,11.DOI:10.12118/j.issn.1000-6060.2024.633
沙质草原风蚀坑发育过程中植物-土壤系统碳动态
Carbon dynamics of the plant-soil system during the development of wind erosion pits in a sandy grassland:A case of Xilin Gol League grassland
摘要
Abstract
Grassland wind erosion pits change the plant growth environment and affect the carbon cycle process of grassland ecosystems.From April to October 2022,the effect of wind erosion pit development on the carbon dynamics of plant-soil system was studied in the sandy grassland of Duolun County,Xilin Gol League,Inner Mongolia Autonomous Region of China by using the spatiotemporal substitution method.The spatiotemporal het-erogeneity and environmental response of soil physical and chemical properties,plant and soil carbon storage,and soil carbon gas flux were analyzed.The results showed that:(1)The development of wind erosion pits signifi-cantly reduced the total plant biomass and total plant carbon storage,especially during the active wind erosion pit stage,where they decreased by 97.09%and 95.48%,respectively.(2)The soil carbon pool lost the most in the ac-tive wind erosion pit stage,with soil organic carbon,microbial biomass carbon and total carbon contents decreas-ing by 63.53%,74.58%and 61.08%,respectively.(3)The development of wind erosion pits significantly reduced soil greenhouse gas flux.During the active wind erosion pit stage,the cumulative CO2 emissions from the soil de-creased by an average of 60.99%;at the same time,the soil CH4 absorption decreased by an average of 88.89%,and turned from absorption to release in May-June.(4)The development of wind erosion pits mainly affected the stability of the carbon pool in the plant-soil system by changing structural indicators such as soil bulk density and porosity.In summary,the development of wind erosion pits significantly changed the carbon dynamics of the plant-soil system in sandy grasslands,causing serious losses in plant and soil carbon pools and exacerbating soil impoverishment.关键词
土壤碳库/植物碳库/土壤温室气体/草原风蚀坑Key words
soil carbon pool/plant carbon pool/soil greenhouse gas/grassland wind erosion pit引用本文复制引用
吕楠,葛楠,王博,李雨薇,余雅楠,李欣,王传琪..沙质草原风蚀坑发育过程中植物-土壤系统碳动态[J].干旱区地理,2025,48(9):1612-1622,11.基金项目
内蒙古自然科学基金项目(2023LHMS04005) （2023LHMS04005）
国家自然科学基金项目(42367058)资助 （42367058）
