Abstract

In order to provide a scientific basis for the establishment of grain production policy, the temporal-spatial pattern of the proportion of grain-crop sown area at county level in Henan province is analyzed by the Kernel density method, ESDA method and spatial variogram method, using the softwares-such as GS+, ArcGIS and GeoDa. The following results are drawn based on the 126 county-scale data in 1980, 2004 and 2012. (1) The proportion of grain-crop sown area is decreased from 0.812 to 0.700 and the total disparities of the proportion of grain-crop sown area at county level in Henan province have enlarged. The distribution shapes of the proportion of grain-crop sown area typical “single peak” shape in 3 years, transforming from “spike peak” in 1980 to “broad peak” in 2004 and 2012. (2) The proportion of grain-crop sown area at county level shows a significantly trend of positive spatial correlation and similar areas cluster in space. And, the spatial continuity and constitutive property of the proportion of grain-crop sown area, as well as the mechanism of structural difference caused by spatial autocorrelation become more and more obvious and remarkable.

Keywords:

Henan, kernel density method, proportion of grain-crop sown area, temporal-spatial pattern, variogram,

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The authors have no competing interests.

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