Analysis on the spatiotemporal pattern and driving force of the spatial deviation index of grain and economy in counties in China.

In the first stage (2000–2003), China’s SDIGE showed a growing trend, with an average growth rate of 2.05%; In the second stage (2004–2015), China’s SDIGE showed a trend of fluctuation and decline, with an average growth rate of -0.30%, indicating a phenomenon of economic development occupying the space for grain production; In the third stage (2016–2019), China’s SDIGE showed a rising development trend, with an average growth rate of 2.20%, indicating that the phenomenon of "economic expulsion of grain" has eased.

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The regression coefficient shows a decreasing trend over time, and the degree of dispersion is gradually expanding.

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