《Table 1 Total net primary productivity of China simulated by different models[17]》

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《北纬18°以北中国陆地生态系统逐月净初级生产力1公里栅格数据集(1985-2015)》

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Based on the CASA model，the annual NPP of China’s terrestrial ecosystems from 1985 to2015 was 1.69–2.16 Pg C/a（1 Pg=1×1015 g）.Compared with existing research，the NPP estimated in this study is within the normal fluctuation range（Table 1）.The measured NPP and model-simulated NPP from references are listed in Table 2.In the present study，the simulated annual NPP of the evergreen coniferous forest ecosystem was 245–538 g C/（m2 a），the annual NPP of the evergreen broad-leaved forest ecosystem was 484–711 g C/（m2 a），the annual NPP of the deciduous coniferous forest ecosystem was 136–276 g C/（m2 a），the annual NPP of the mixed forest ecosystem was 164–378 g C/（m2 a），the annual NPP of the grassland ecosystem was 159–250 g C/（m2 a），and the annual NPP of the farmland ecosystem was 223–324 g C/（m2 a）.These values all agree well with existing studies，indicating that the NPP generated by the present study has a good accuracy.