Effect of thinning intensity on understory herbaceous diversity and biomass in mixed coniferous and broad-leaved forests of Changbai Mountain

Forest Ecosystems

Table 3 Biomass of herbaceous plants in different months

Month	Treatments	Total biomass (g·m^− 2)	Aboveground biomass (g·m^− 2)	Belowground biomass (g·m^− 2)	Root-shoot ratio	Number per m²	Mean height (cm)	Total coverage (%)
May	CK	113 ± 10a	53 ± 4a	59 ± 7a	1.11 ± 0.10a	216 ± 12a	11.95 ± 0.36ab	68.75 ± 3.70ab
	LT	194 ± 12b	86 ± 5b	109 ± 8bc	1.29 ± 0.06a	198 ± 11a	11.14 ± 0.36a	59.60 ± 2.77a
	MT	188 ± 21b	71 ± 10ab	117 ± 12b	1.86 ± 0.17b	275 ± 18b	12.44 ± 0.48b	72.75 ± 3.55b
	HT	163 ± 15b	76 ± 8b	88 ± 8c	1.18 ± 0.09a	265 ± 19b	12.09 ± 0.41ab	67.53 ± 4.46ab
July	CK	207 ± 16a	104 ± 11a	104 ± 8a	1.05 ± 0.08a	122 ± 14a	30.14 ± 1.18a	65.63 ± 3.13a
	LT	240 ± 13a	108 ± 6a	132 ± 9ab	1.24 ± 0.08a	175 ± 20ab	26.89 ± 1.88a	70.20 ± 3.70a
	MT	236 ± 19a	107 ± 9a	128 ± 12a	1.22 ± 0.09a	191 ± 18b	28.07 ± 1.20a	70.65 ± 2.98a
	HT	339 ± 53b	154 ± 16b	185 ± 39b	1.12 ± 0.13a	219 ± 29b	28.79 ± 1.34a	81.67 ± 3.89b
September	CK	161 ± 8a	85 ± 3a	76 ± 5a	0.89 ± 0.05a	109 ± 10a	25.12 ± 0.75a	58.30 ± 2.24a
	LT	273 ± 22b	112 ± 7a	161 ± 17b	1.43 ± 0.12b	134 ± 26ab	21.20 ± 1.90b	70.06 ± 3.96b
	MT	289 ± 30b	113 ± 8a	176 ± 23bc	1.51 ± 0.13b	181 ± 16b	24.62 ± 0.98ab	76.80 ± 3.28b
	HT	418 ± 43c	192 ± 28b	225 ± 31c	1.41 ± 0.25b	180 ± 43b	21.47 ± 1.36ab	78.13 ± 4.93b