Figure 4
Maximum carboxylation rate (Vcmax) and maximum electron transport rate (Jmax) in the seedling leaves of the four tree species after exposure to different soil nitrogen (N) treatments. The statistical differences between each characteristic of the different species under the three N treatments (mean ± SE) are the results of a one-way analysis of variance (ANOVA) (n = 7). The lowercase letters indicate significant differences at the 0.05 level between different N treatments, and the uppercase letters indicate significant differences at the 0.05 level between the species under the same N treatment. Control, high N; MN, medium N; and LN, low N.
