Post-heading dry-matter transport and nutrient uptake differentiate hybrid and inbred indica rice in the double-cropping system in South China.

Correlation analysis Significant or extremely significant linear positive correlations were observed between rice yield and the number of productive panicles ( P < 0.05), thousand grain weight ( P < 0.01), total biomass ( P < 0.01), harvest index ( P < 0.01), post-heading dry matter ( P < 0.01), grain nitrogen uptake ( P < 0.01), grain phosphorus uptake ( P < 0.01), internal nitrogen use efficiency ( P < 0.01), and internal phosphorus use efficiency ( P < 0.01).

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