摘要
[目的]定量评估退耕还林还草工程对黄土丘陵沟壑区生态系统碳储量的影响,为区域生态建设提供理论基础。[方法]采用GIS空间分析法与InVEST模型相结合,研究2000-2020年黄土丘陵沟壑区土地利用及碳储量变化。[结果]①研究区2000-2020年耕地转为林、草地面积分别占耕地转出量的20.75%,86.56%,区域林、草地覆盖率增加了1.76%;②退耕还林工程显著提升了黄土丘陵沟壑区碳汇功能,碳储量由2000年的8.22×10^(8)t增长至2020年的8.26×10^(8)t,2010年碳储量达到峰值,为8.35×10^(8)t;③研究区净增加碳储量远远抵消了碳流失量,其中还林还草的碳储量贡献率最大,分别是38.82%,22.58%。[结论]实施退耕还林还草工程对区域生态系统碳储量具有显著的正面作用,林、草地建设均可增强生态系统碳储存服务。未来研究应重点关注生态修复工程的碳汇贡献,科学管理林、草植被,提高区域生态系统服务功能。
[Objective]The impact of the project to convert farmland to forest and grassland on terrestrial ecosystem carbon storage in the loess hilly-gully region was quantitatively evaluated in order to provide a basis for regional ecological construction.[Methods]The GIS spatial analysis method and the InVEST model were used to study changes in land use and carbon storage in the loess hilly-gully region from 2000 to 2020.[Results]①From 2000 to 2020,the conversion area of cultivated land to forest and grass land accounted for 20.75%and 86.56%,respectively,of the total conversion amount of cultivated land,and the coverage rate of forest and grassland increased by 1.76%.②The conversion of farmland to forest significantly improved the carbon storage service in the loess hilly and gully region,and carbon storage increased from 8.22×10^(8) t in 2000 to 8.26×10^(8) t in 2020,and reached a peak of 8.35×10^(8) t in 2010.③The increase in net carbon storage of the study area was more than offset the carbon loss,and the contribution rate of carbon storage returning forest and grassland was the largest,which was 38.82%and 22.58%,respectively.[Conclusion]Implementing the project of returning farmland to forest and grassland has had a significant positive effect on the carbon storage of the regional ecosystem.Forest and grassland construction can enhance ecosystem carbon storage services.Future research should focus on the carbon sequestration contribution of ecological restoration projects,the scientific management of forest and grass vegetation,and improving regional ecosystem services.
作者
姚楠
刘广全
姚顺波
邓元杰
侯孟阳
张晓
Yao Nan;Liu Guangquan;Yao Shunbo;Deng Yuanjie;Hou Mengyang;Zhang Xiao(College of Economics and Management,Northwest A&F University,Yangling,Shaanxi 712100,China;China Institute of Water Resources and Hydropower Research,Beijing 100048,China;School of Economics,Hebei University,Baoding,Hebei 071000,China)
出处
《水土保持通报》
CSCD
北大核心
2022年第5期329-336,共8页
Bulletin of Soil and Water Conservation
基金
“十三五”国家重点研发计划项目“水蚀风蚀交错区植被群落构建与沙棘产业化技术及示范”(2016YFC0501705)
中国水科院R&D项目(SC0145B012022,SC0202A012018)。
关键词
退耕还林(草)工程
黄土丘陵沟壑区
土地利用
碳储量
InVEST模型
the project to convert farmland to forest and grassland
loess hilly-gully region
land utilization
carbon storage
InVEST model
