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Table 1 The parameters of the statistics-based multiple regression model between forest net primary productivity (NPP) and environmental variables (T is annual temperature (°C), P is annual precipitation (mm), A is altitude (m), NDVI is normalized difference vegetation index (0 < NDVI ≤1))

From: Variation of net primary productivity and its drivers in China’s forests during 2000–2018

ParametersCoefficientsStandard errort StatP-valueLower 95%Upper 95%
Intercept333.67056.3305.9238294.33E-09223.140444.21
T−9.1363.680−2.4838800.01316−16.350−1.92
P0.1280.0562.2855290.0224920.0180.24
T × P0.0220.0045.6204192.47E-080.0140.03
A−0.0270.009−3.1930800.001452−0.044− 0.01
NDVI97.13059.2401.6395600.101413−19.120213.39