嘉兴市耕地细碎化和空间集聚格局分析

为了探索耕地细碎化与区域社会经济的空间格局耦合关系,该文基于土地利用现状数据,获得嘉兴市耕地细碎化指数及其空间分布。基于空间自相关性分析的耕地细碎化结果表明,嘉兴市3个耕地细碎化指数的空间聚集程度顺序是斑块面积指数>斑块分散指数>斑块形状指数;嘉兴市3个耕地细碎化指数的局部空间自相关集中在H-H型(高-高关联)和L-L型(低-低关联)的镇(街道)占到了80%以上。耕地斑块面积指数强势H-H型主要分布在嘉兴地区西部的桐乡市和海宁市,耕地斑块分散指数强势H-H型主要分布在嘉兴地区东部的平湖市、南湖区和海盐县,耕地斑块形状指数强势H-H型主要分布在嘉兴地区东部的平湖市和嘉善县。进行耕地细碎化和社会经济发展的空间耦合性分析表明,农村居民点分散度指标和斑块面积指数以及斑块分散指数的空间耦合性最好。分析嘉兴市耕地细碎化空间格局及其与社会经济发展的关系能够为耕地保护在空间格局优化上提供参考和建议,对于农村土地整治和土地利用效率的提升具有指导意义。

Analysis on cultivated land fragmentation and spatial agglomeration pattern in Jiaxing city

To understand the spatial agglomeration pattern of cultivated land fragmentation and social-economic in a certain region, indices of cultivated land fragmentation were calculated on the basis of land use data. Spatial patterns of cultivated land patch indices of area, dispersion and shape in Jiaxing city were assessed. The spatial autocorrelation indicated that the accumulation order of three land fragmentation indices in Jiaxing city was patch area index per unit > patch dispersion index per unit > patch shape index per unit; in addition, the total area in H-H(high spatial autocorrelations)and L-L(low spatial autocorrelations)type accounted for over 80% of Jiaxing city. The high accumulation region with patch area index was located at Tongxiang and Haining in the West of Jiaxing; the high accumulation region with patch dispersion index was located at Pinghu, Nanhu and Haiyan in the East; the high accumulation region with patch shape index was located at Pinghu and Jiashan on the East. It also indicated that there were best spatial correlations among patch area index, patch dispersion index and rural residential dispersion. It is very useful for spatial optimization of regional cultivated land protection and rural land consolidation as well as promotion of land-use efficiency.