黑龙江省耕地非农化的空间格局与重心曲线分析

Analysis of spatial pattern and gravity center curve of cultivated land conversion in Heilongjiang province

为了揭示耕地非农化的空间格局与重心曲线,为耕地资源保护和利用政策制定提供决策支撑,该文以黑龙江省1980、1990、2000、2010、2015年土地利用数据为基础,运用GIS空间分析方法,引入重心模型分析黑龙江省耕地非农化的空间格局及重心曲线。研究结果表明:1980—2015年黑龙江省耕地非农化发展不平衡,4个时期耕地非农化面积呈波动增长的趋势;耕地非农化等级空间分布特征明显,等级较高的城市集中分布在西部地区;耕地非农化速度等级的重心曲线在空间分布上,具有从中心向边缘延伸的特点;耕地非农化围绕中心地区进行,其空间扩散路径在图形上呈现出一个回旋状。

In order to reveal the spatial pattern and center of gravity curve of cultivated land non-agriculturalization,and to provide decision-making support for the policy making of cultivated land resource protection and utilization,based on the land use data of Heilongjiang province in 1980,1990,2000,2010 and 2015,this paper used GIS spatial analysis method and introduced gravity center model to analyze the spatial pattern and gravity center curve of cultivated land conversion in Heilongjiang province.The results showed that from 1980 to 2015,the development of cultivated land conversion in Heilongjiang province was unbalanced,and the area of cultivated land conversion in four periods showed a trend of fluctuating growth.The spatial distribution characteristics of cultivated land conversion grade were obvious,and the cities with higher grade were concentrated in the western region.The center of gravity curve of cultivated land conversion speed grade extended from the center to the edge in the spatial distribution.The spatial diffusion path of cultivated land conversion around the central area showed a roundabout shape on the graph.