图9. 黄土高原2020年不同气候条件下植被恢复区域和原有植被区域的总初级生产力差异(GPPD)。A, 不同温度等级下的林地恢复GPPD。B, 不同温度等级下的草地恢复GPPD。C, 不同土壤湿度等级下的林地恢复GPPD。D, 不同土壤湿度等级下的草地恢复GPPD。
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Fig. 9. Gross primary production difference (GPPD) between revegetation and existing vegetation area under different climate conditions in the Loess Plateau in 2020. A, GPPD of revegetated forest under different temperature levels. B, GPPD of revegetated grassland under different temperature levels. C, GPPD of revegetated forest under different soil moisture levels. D, GPPD of revegetated grassland under different soil moisture levels.
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