鸭绿江口优质稻产区耕地格局与碳储量变化  

Changes of Cultivated Land Pattern and Carbon Storage in High-quality Rice Producing Area at Yalu River Estuary

作　　者：郭屹岩[1] 姚有庆[1] 李富祥[2] GUO Yi-yan;YAO You-qing;LI Fu-xiang(School of Agriculture,Liaodong University,Dandong 118003,China;School of Science,Liaodong University,Dandong 118003,China)

机构地区：[1]辽东学院农学院,辽宁丹东118003 [2]辽东学院理学院,辽宁丹东118003

出　　处：《辽东学院学报(自然科学版)》2024年第3期153-162,共10页Journal of Liaodong University:Natural Science Edition

基　　金：东北边境地区乡村振兴研究院项目(XCZX20230101);辽宁省教育厅科研项目(LJKZ1126)。

摘　　要：探索耕地格局与碳储量动态变化规律,对于保护耕地资源和保障粮食安全具有重要意义。基于鸭绿江口地域独特的地理位置、丰富的稻作资源以及土地整治的代表性,选取研究区域内4个典型乡镇作为研究对象。主要运用土地利用动态度和土地利用转移矩阵探索土地利用动态变化,采用InVEST模型测算碳储量变化特征。结果发现:1980—2020年,鸭绿江口优质稻产区耕地格局显著变化,水田面积增加,旱地面积缩减,尤以旱地转水田最多。同期,碳储量总体减少,累计损失2.60×10^(4) t;高碳储量区集中于东部及西北,呈减少和分散趋势,耕作区低碳储量零星分布。碳储量减少主因在于建设用地扩张侵占生态用地及林地减少。Exploring the dynamic changes in farmland patterns and carbon storage is crucial for protecting farmland resources and ensuring food security.Based on the unique geographical location,abundant rice farming resources,and representativeness of land remediation in the Yalu River estuary,this study selected four typical townships within the study area as research objects.It primarily employed land use dynamic degree and land use transfer matrix to explore dynamic changes in land use,and utilized the InVEST model to calculate characteristics of carbon storage changes.Results showed that between 1980 and 2020,significant changes occurred in the farmland pattern of the high-quality rice production area at the Yalu River estuary,with an increase in paddy fields producing,a decrease in drylands and the most promoment conversion from drylands to paddy fields.During the same period,the overall carbon storage decreased,with a cumulative loss of 2.60×10^(4) t.High carbon storage areas were concentrated in the east and northwest,showing a trend of reduction and dispersion,while low carbon storage areas in farming regions were sporadically distributed.The main reasons for the decrease in carbon storage were the expansion of construction land encroaching on ecological land and the reduction of forest land.

关 键 词：碳储量 耕地格局 InVEST模型 鸭绿江口 

分 类 号：F301.21[经济管理—产业经济] P237[天文地球—摄影测量与遥感]