Table 3. The number of Abies nephrolepis seedling classified by height class.

Vegetation unit	VU1	VU2	VU3	VU4	VU5	VU6	VU7
h<10 cm	151	83	79	22	40	82	29
10 cm≦h<50 cm	100	59	57	22	41	87	50
50 cm≦h	144	132	66	17	50	218	69
Mean number	9.88	7.21	5.77	3.59	9.36	9.92	16.44