Effects of nitrogen stress on the photosynthetic CO2 assimilation, chlorophyll fluorescence, and sugar-nitrogen ratio in corn.

Interaction relationships between Ph, F v /F m , LNC, LSC, LDW, and S/N There were highly significant (P < 0.01) interactions between Ph, F v /F m , LNC, LSC, LDW, and S/N, with the exception of the interaction between LSC and S/N and between LSC and LDW ( Table 5 ).

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