Spatiotemporal dynamic evolution and driving factors of desertification in the Mu Us Sandy Land in 30 years.

Moderate desertification showed a trend of decreasing–increasing–decreasing.

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The degree of desertification in the Mu Us Sandy Land showed an overall trend of improvement after 2000, but serious local deterioration and desertification was still occurring.

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The spatial extent in cultivated land area showed an increasing trend in the past 30 years and increased the most in 1997.

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The spatial extent of cultivated land showed a decreasing trend from 2001 to 2003, and a growth trend which slowed down after 2010.

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Using regression model to analyze the trends of the desertification index, a third-order polynomial fitting equation was obtained: y = 0.0002 x 3 − 1.1989 x 2 + 2404.7 x − 2E + 06, correlation R 2 = 0.9643, which was extremely significant.

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