Fig. 4From: Nitrogen addition increases sexual reproduction and improves seedling growth in the perennial rhizomatous grass Leymus chinensisPotential number of germinating seed density based on control versus nitrogen seed production. Presented are the means ±1 S. E for 6 replications. Different letters indicate the significant differences between control and nitrogen addition treatment among three experimental years (P < 0.05, from post hoc comparison). For detail ANOVA results, see Table 1Back to article page