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. 2025 Sep 2;16:1618027. doi: 10.3389/fpls.2025.1618027

Figure 5.

Graphs showing nitrogen accumulation in grains over days into the grain filling period. Five panels display curves for different treatments labeled TPM and SPM, with variations in nitrogen accumulation rates. The right panel shows three curves for CK treatments with higher nitrogen accumulation, all peaking around day one hundred seven.

Grain nitrogen accumulation and its parameters. TPM, CPM, SPM, and CK represent an ordinary photovoltaic panel, a checkerboard photovoltaic panel, a translucent photovoltaic panel (with a light transmittance of 40%), and a comparison with field treatment, respectively. B and R represent the positions directly below and rear of the photovoltaic panel, respectively. The use of lowercase letters in Figures 2a, b denotes statistical significance at the 5% level among the various treatments. In Figure 2c , grain-1, grain-2, and grain-3 represent the three replicates of the same treatment, respectively. The equations were obtained by logistic simulation.