Spatiotemporal Changes of Cultivated Land System Health Based on PSR-VOR Model-A Case Study of the Two Lake Plains, China.

In general, Class I area shows a decreasing trend year by year.

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In the five periods from 2000 to 2019, the Class II area is 1,250,600 hm 2 , 1,234,600 hm 2 , 1,618,900 hm 2 , 1,811,900 hm 2 , and 1,584,600 hm 2 respectively, accounting for 33.21%, 33.32%, 43.97%, 50.65%, and 48.67% of the total cultivated land area ( Table 5 ) and showing an increasing trend year by year.

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The area of Class I cultivated land shows a negative trend between 2005 and 2010, declining by 593,900 hm 2 .

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The global Moran’s I values in the five periods are all greater than 0, and through the significance test of the 5% confidence level, the overall shows a fluctuating upward trend, indicating that there is a significant spatial positive autocorrelation in the health index in each grid of the two lake plains, and that its spatial distribution was not random, there is an obvious trend of agglomeration and distribution of adjacent grids in space.

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