Table 3. Stem density (D, number of stems ha^-1), basal area (BA, m² ha^-1) and importance percentage (IP, %) of major tree species (DBH ≥ 2 cm) in each stand.

Species	NA I			NA Ⅱ			NA Ⅲ			PL
	D	BA	IP	D	BA	IP	D	BA	IP	D	BA	IP
Abies holophylla	850	18	51.1	650	38.72	79.1	1800	1.75	40.4	2600	6.43	46.2
Larix kaempferi	13	1	5							500	21.09	43
Pinus koraiensis	38	3	7	25	0.06	1.4	300	2.77	16.8	300	0.22	4.4
Castanea crenata	138	5	12.7	100	4.22	10.2	200	6.76	31.3	100	1.33	3.6
Quercus species	175	2	5.2				200	0.9	7.4
Other species	538	3	18.9	175	0.12	9.4	200	0.1	4.1	200	0.06	2.8
Total	1750	31.31	100	950	43.13	100	2700	12.27	100	3700	29.13	100
Species	FB				PP I				PP Ⅱ
	D	BA		IP	D	BA		IP	D	BA		IP
Abies holophylla	583	27.20		58.2	400	35.64		65.6	450	14.17		36.1
Pinus koraiensis	110	9.18		11.1	125	6.71		15.4	325	16.03		33
Castanea crenata	50	0.19		2.3	63	0.33		4.2	225	7.02		17.9
Quercus species	65	3.72		8.3	13	0.64		1.5	150	4.63		11.9
Other species	280	0.24		20.1	213	0.11		13.2	25	0.06		1.1
Total	1088	40.54		100	813	43.43		100	1175	41.92		100