摘要
基于GIS平台和SOFM模型,将水源涵养、土壤保持和植被固碳作为衡量黄土高原水土热资源的指标,分析2000—2019年黄土高原的水土热匹配度时空变化;基于三类生态系统服务价值的多年平均值,在土地资源分区的基础上修正生态功能区划边界。研究表明:2000—2019年,黄土高原水土热匹配度状况整体上升,但不同土地资源分区的水土热匹配度增速以及稳定性存在差异,沙地与沙漠区、河谷平原区以及黄土高原沟壑区水土热匹配度的增速最大,分别为3.25、2.44和2.43,水土热匹配度稳定性呈现东南高、西北低的状态。SOFM模型在黄土高原的生态功能区划上表现良好,划分了六大生态功能区,并基于土地资源分区划分了16个子区域,包括植被涵养区、农业生产区、牧业发展区、农牧兼顾发展区和生态脆弱区。
The identification of zoning boundaries is an important point for zoning work and the rationality of zoning boundaries needs to be repeatedly verified in practical work.Further refining the ecological functions of land based on the land resources zoning can ensure the rationality of zoning boundaries and the consistency of internal geographical features.In this study,ecosystem services including water conservation,soil conservation and vegetation carbon sequestration were quantified as indicators of soil,water and heat resources and used to analyze the spatio-temporal changes from 2000 to 2019 based on GIS platform and the SOFM model.According to the average value of the above 3 ecosystem services in several years,the boundaries of ecological function zoning is revised on the basis of land resource zoning.The results showed that the overall matching degree of soil,water and heat resources has been improved from 2000 to 2019.However,there are differences between the growth rate and stability in different land resources zoning.The regions with the highest growth rate are sandy and desert regions,valley plain regions and loess gully regions with a rate of 3.25,2.44 and 2.43 respectively and the stability pattern of matching degree of soil,water and heat resources is higher in the southeast and lower in the northwest.The SOFM model performed well in the regionalization of ecosystem function and 6 ecological function zones were divided eventually.Based on the 6 land resources zoning,the Loess Plateau was divided into 16 sub-regions including vegetation conservation regions,agricultural production regions,animal husbandry regions,agriculture and animal husbandry regions and ecologically fragile regions,etc.The results provide references for the land use development and agricultural production planning of the Loess Plateau.
作者
刘黎
赵永华
韩磊
韩玲
王茜
汤剑秋
LIU Li;ZHAO Yonghua;HAN Lei;HAN Ling;WANG Xi;TANG Jianqiu(School of Land Engineering,Chang′an University,Key Laboratory of Degraded and Unused Land Consolidation Engineering,Ministry of Natural Resources,Shaanxi Key Laboratory of Land Consolidation,Xi′an 710054,Shaanxi,China)
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第6期86-97,共12页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金(31670549,31170664)
自然资源部退化及未利用土地整治工程重点实验室开放基金(SXDJ2019-03)
中央高校基本科研业务费专项资金(300102270206,310827172007)。
关键词
生态系统服务
水土热匹配度
SOFM模型
生态功能区划
黄土高原
ecosystem services
the matching degree of soil,water and heat resources
SOFM model
ecological function regionalization
Loess Plateau
