Loss rate of net primary productivity under drought stress on the Yinshanbeilu of Inner Mongolia, China.

The significance test ( p > 0.05) was passed by the regions that accounted for 23.75% of the total area, while the highly significant test (( p < 0.01) was passed by the regions that accounted for 54.22% of the total area.

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(1) During 2000-2020, the western multi-timescale SPEI indices all show a decreasing trend, indicating that the region tends to be arid, while most of the eastern regions show an increasing trend in multi-timescale SPEI indices, indicating that these regions show a trend of becoming wetter.

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From May to August, with the worsening of drought, the loss rate showed an increasing trend.

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Spatial and temporal trends of NPP From 2000 to 2020, the mean NPP of vegetation at the northern foot of Yinshan showed great inter-annual variation, and showed a trend of fluctuation and increase, with an increase rate of 2.974g·m -2 ·a -1 .

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