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.