Effects of nutrient addition on the slopes and intercepts of reproductive allometric relationships at the spike (a1), tiller (a2) and individual (a3) levels and of the final R-V allometric relationship at the whole plant level (a).

Allometric slopes and intercepts were gained from the log–log linear relationship, log10Y = Slope×log10X+Intercept, using regression SMA analyses. If the slopes of two allometric models were not significant, the effects of fertilization on the intercepts were tested. R2 values represent how much variable percentage can be explained by the models. “–” indicates that the relationship is not significant at P = 0.05. Bold allometric slopes indicate that significant difference from 1 at P = 0.05. Figures with different letters are significantly different at P = 0.05.