Fig. 8
From: Drivers of carbon flux in drip irrigation maize fields in northwest China
Structural equation models for daily net ecosystem echange (NEE). ecosystem respiration (ER) and gross primary production (GPP) during the growing season in 2014–2018. (Values on arrows are the standardized path coefficients (SC), representing standardized total effects of climatic factors on carbon and water vapor fluxes. The line weight represents the standard effect sizes, and the black line represents the relationship is not significant, The thick blue line represents a very significant correlation, p < 0.01;The thin blue line represents a significant correlation, p < 0.05)