Abstract:

The fragmentation of cultivated land is the main problem in realizing large-scale management of agriculture in China. Based on the data of rural contracted land management right in Heshun County, this paper used landscape pattern software to obtain three indexes: patch area index (PAI), patch shape index (PSI) and patch density index (PDI), to measure the degree of cultivated land fragmentation. Beside, GIS spatial analysis and regression analysis were used to study the fragmentation of cultivated land and its influencing factors. The results demonstrated that: (1) patch area index (PAI), patch shape index (PSI) and patch density index (PDI) had the same spatial distribution characteristics, namely, the fragmentation of cultivated land in eastern, western and central regions showed a downward trend in turn; (2) the cultivated land fragmentation showed spatial aggregation, in the local spatial autocorrelation analysis, L-L type was concentrated around the central county seat; (3) in view of the influencing factors, the per capita cultivated land area had a significant effect on the patch area index and patch density index, while the slope and homestead rate had a negative effect on the patch area index and the patch density index, and the labor force ratio and per capita cultivated land area had a negative effect on the shape index. This research can provide scientific reference for improving the utilization rate of regional cultivated land and realizing agricultural scale management.

Key words: Heshun County, Moran’s index, linear regression analysis, village land domestication rate, land fragmentation, landscape pattern, influencing factors