Fig. 2
From: Plant community restoration time is a key factor affecting plant nutrient and species richness
Effect of succession time on soil nitrogen and phosphorus content and their ratio. A: Total soil nitrogen. B: Total soil phosphorus. C: The ratio of total soil nitrogen to total soil phosphorus. D: Available soil nitrogen. E: Available soil phosphorus. F: The ratio of available soil nitrogen to available soil phosphorus. Note: Lowercase letters indicate that the difference in the same indicator reached the significance level at different restoration times. Data shows (mean ± standard error, n = 4).
