Table 1. General stand characteristics in Quercus acutissima, Q. mongolica, Q. serrata, and Q. variabilis stands.

Stand	No. of plot	Stand age	Elevation (m)	Stand density (tree ha−1)	Mean DBH (cm)	Mean height (m)	Site index	Basal area (m2 ha−1)	Volume (m3 ha−1)
Q. acutissima	72	35±1.4c*	166±8c	753±40a	20.1±0.6b	13.8±0.3ab	14.9±0.5a	24.4±1.0b	176±8b
Q. mongolica	150	59±1.3a	667±21a	787±22a	21.8±0.4b	13.5±0.2b	15.3±0.2a	30.3±0.8a	213±6a
Q. serrata	97	43±1.0b	317±20b	527±22b	24.7±0.8a	14.4±0.2a	14.4±0.3a	26.2±1.1b	175±7b
Q. variabilis	104	43±1.1b	340±14b	806±38a	21.0±0.5b	13.5±0.2b	14.7±0.3a	27.3±0.9ab	211±11a

Mean±standard error. Different letters among stands represent a significant difference at P<0.05.