河北省耕地多功能评价与关键权衡协同分析

Multifunctional evaluation and key trade-offs and synergy relationships of cultivated land in Hebei province of China

耕地多功能评价有助于显化耕地多功能价值,通过探究功能之间权衡协同的关键区域与作用类型,提供更合理的耕地利用与优化措施。该研究以河北省为研究区域,构建功能评价指标体系分类评价县域耕地生产、生态和生活功能,基于Spearman秩相关和空间自相关衡量功能相关关系,并判断相关关系的区域差异,由此划分耕地功能分区与核心区。结果表明:1)2010—2020年河北省耕地生产功能维持稳定,生态功能有所下降,生活功能逐步提升,三类功能之间均为协同关系;2)功能协同的关键区域多为功能高值区,部分功能之间的相关关系会随着区域功能强度的不同发生变化;3)粮食生产、景观美学与粮食安全保障子功能的相互作用对于三类功能协同关系贡献较大;4)基于耕地功能强度划分6类耕地功能优势区,进一步基于空间自相关分析识别出3类功能核心区。分析耕地功能之间权衡协同的区域差异,确定发挥重要贡献的子功能作用类型,以此划分耕地功能分区,以期提供更精确的耕地利用优化方案。

In 2021,China achieved a comprehensive victory in the battle against poverty,and fully advancing the work of rural revitalization became the new focus of efforts.As an important component of rural areas,cultivated land is the material foundation and important support for rural revitalization.The multifunctional evaluation of cultivated land can help to reveal the multifunctional value of cultivated land,providing more reasonable cultivated land use and optimization measures by exploring the key areas and types of trade-offs and synergy between functions.It is of great significance for advancing the rural revitalization strategy and achieving the modernization of agriculture and rural areas.Taking Hebei Province as the research area,this paper constructs a functional evaluation index system to classify and evaluate cultivated land's production,ecological and living functions and subfunctions.Based on Spearman rank correlation and spatial autocorrelation,we examined the tradeoffs and synergy among different cultivated land functions,used the natural discontinuity classification method to divide cultivated land functions into secondary,tertiary and fourth-level classifications,compared the Spearman rank correlation coefficients between the functions in each group of data,determined regional differences in functional correlation,identified key functional trade-off and synergy regions as well as sub-functional role types,and finally cultivated land functional zones and core areas were divided.The results show that:(1)From 2010 to 2020,the production function of cultivated land in Hebei Province remained stable,the ecological function decreased,and the living function gradually improved.The three functions are all in a synergy relationship and apart from a weakening in the synergy between living and ecological functions from 2015 to 2020,the degree of synergy among other types of functions has gradually increased.(2)The key areas for functional synergy are mostly high-value areas.In the zoning based on the level of production function,the relationship between production function and ecological function shifted from low-value synergy to high-value trade-off.And in the zoning based on the level of living function,the synergy between the living function and the other two types of functions decreased as the living function improved.(3)There are more complex trade-offs and synergy among the subfunctions of cultivated land in Hebei Province.The synergy between landscape aesthetic subfunction and the three types of production subfunctions is the key to the synergy between production function and ecological function,and the synergy between landscape aesthetic subfunction and food security subfunction contributes the most to the synergistic relationship between ecological function and living function,and the synergy between grain production subfunction,large-scale production subfunction and food security subfunction is the key synergy between production function and living function.(4)Based on the values of cultivated land function,6 types of cultivated land function advantage areas are divided,and 3 types of core functional areas are identified by combining spatial autocorrelation analysis.Our research analyzes the regional differences in trade-offs and synergy of cultivated land functions,identifies the important types of subfunctions that make significant contributions to functional synergy and divides cultivated land functional zones accordingly,to provide a more accurate optimization scheme for cultivated land use.