Figure 3
From: Various response of Pinus tabulaeformis Carr. regeneration in artifical gaps

The AAH-B and AAH-A of REBG among gap size classes. The bars represent ± SE. Uppercase (p < 0.01) letters above the standard error bars indicate significant differences (Duncan’s test) in AAH-A among gap size classes. Asterisks (**p < 0.01) under the X-axis indicate significant differences (Duncan’s test) between AAH-B and AAH-A in the same gap size class. AAH-B = the annual average height growth before gap creation; AAH-A = the annual average height growth after gap creation. Other abbreviations are the same as those provided in Fig. 1.