Two-way ANOVA of photosynthetic indicators and leaf chlorophyll content for <i>C. angustifolia</i> and <i>G. spiculosa</i> during the phase of peak growth, and above-ground biomass and leaf total nitrogen content after harvest.

Significant effects (p<0.05) are shown in bold. When the highest order of interaction effect is significant, the significant main effect is not in bold.