广东省县域农用地经济密度空间差异分析

Spatial difference analysis on economic density of county agricultural land in Guangdong province

为了促进农用地有效保护与合理利用,运用GIS技术和空间自相关分析方法,对1996—2011年广东省县域农用地经济密度的空间差异进行了分析。结果表明:广东省农用地经济密度持续提高,绝对差异不断增大,相对差异呈波动缩小趋势;广东省县域间农用地经济密度具有明显的正相关性,总体空间差异趋向缩小,空间分布越来越集中,较高密度区集中在珠江三角洲平原区、粤西沿海区和粤东沿海区,较低密度区则集中在粤北山区;广东省县域农用地经济密度的局部集聚格局显著,局部空间差异呈扩大态势。因此,应根据不同区域农用地经济密度差异、社会经济发展特征,制定区域差别化的农用地管理政策。

In order to promote the effective protection and reasonable utilization of agricultural land, this paper analyzed the spatial difference of county agricultural land economic density in Guangdong province from 1996 to 2011 using exploratory spatial data analysis （ESDA） and GIS technology. The results showed that, agricultural land economic density steadily improved, but the absolute difference increased constantly while relative difference narrowed fluctuantly. County agricultural land economic density had a positive spatial autocorrelation, and the overall spatial disparities tended to decrease. High density areas concentrated in the Pearl River Delta plain, western Guangdong coastal district and eastern Guangdong coastal district, and low density areas were concentrated in mountainous area of northern Guangdong province. The local spatial clustering pattern of county agricuhural land economic density in Guangdong province was significant, and the trend of local spatial discrepancies was to expand. To manage agricultural land more effectively, it is better to improve the regional management policies according to differences of agricultural land economic density and socio-economic features.