Responses of tree growth to harvesting intensity among forest strata and growth stages in a broadleaved Korean pine forest

doi:10.17521/cjpe.2021.0454

Abstract

Abstract:

Aims Harvesting is an important way to adjust stand structure. Trees in different forest strata have different responses to harvesting intensity. Traditionally, qualitative or simple quantitative methods (e.g., with equal distance of tree height) were used to identify the vertical layers of the forest, and the impact of harvesting on each layer were analyzed subsequently. However, these methods of specification ignore the differences in tree growth between different tree species and different developmental stages within the same layer.

Methods Four permanent plots were established in a broadleaved Korean pine forest in Jiaohe, Jilin Province, ranging in harvesting intensities from low (17.3% of basal area removed), medium (34.7%) to high (51.9%), together with an unharvested control plot. Tree growth rates were documented 2, 4 and 7 years after harvesting. According to the position of an individual tree in the forest layer, as well as its development stages, we aggregated all individuals into three cohorts: mature canopy trees (I), immature canopy trees (II), and understory species of any size (III). Tree diameter growth of each cohort were compared during different recovery periods.

Important findings The average relative growth rate (RGR) of diameter at breast height (DBH) for cohort II (0.033 cm·cm^-1·a^-1) was significantly higher than that of cohort I (0.016 cm·cm^-1·a^-1) and II (0.018 cm·cm^-1·a^-1). Overall, harvesting promoted the DBH growth of most canopy dominant tress (I and II). In particular, RGR of cohort II increased progressively with increasing harvesting intensity, while only the greatest harvesting intensity showed a significant positive effect on RGR of cohort I. In contrast, rare species showed weak responses to harvesting treatment. It should be noted that there was a response lag of tree growth to harvesting: no detectable difference in RGR was found between control and harvested plots within the first two years after harvesting, whereas the positive effect of harvesting on RGR began to appear 2-4 years after harvesting and continued during the subsequent monitoring period. The RGR of each cohort decreased with the increase of initial DBH. Moreover, the slopes of initial DBH-RGR relationship increased with harvesting intensity, suggesting that smaller trees benefited more from reduced competition. Our results may provide scientific basis for a more accurate monitoring of the post-harvesting forest dynamics, and would be helpful to future sustainable management of temperate mixed forests.

Key words: broadleaved Korean pine forest, harvesting intensity, relative growth rate, forest strata, tree size, recovery period

WEI Long-Xin, GENG Yan, CUI Ke-Da, QIAO Xue-Tao, YUE Qing-Min, FAN Chun-Yu, ZHANG Chun-Yu, ZHAO Xiu-Hai. Responses of tree growth to harvesting intensity among forest strata and growth stages in a broadleaved Korean pine forest[J]. Chin J Plant Ecol, 2022, 46(6): 642-655.

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Figures/Tables 10

References 45

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样地 Sample plot	海拔 Altitude (m)	坡度 Slope (°)	坡向 Aspect	郁闭度 Canopy density	平均胸径 Mean diameter at breast height (cm)	平均树高 Mean tree height (m)	主要乔木树种组成 Composition of main tree species
CK	453	1	东北 Northeast	0.9	14.6	9.7	3春榆; 2水曲柳; 1紫椴; 1胡桃楸; 1五角枫; +红松; +蒙古栎; +黄檗; -山杨; -朝鲜槐; -三花槭; -硕桦; -白桦; -东北槭; -稠李; -裂叶榆 3 Ulmus davidiana var. japonica; 2 Fraxinus mandshurica; 1 Tilia amurensis; 1 Juglans mandshurica; 1 Acer pictum subsp. mono; + Pinus koraiensis; + Quercus mongolica; + Phellodendron amurense; - Populus davidiana; - Maackia amurensis; - Acer triflorum; - Betula costata; - Betula platyphylla; - Acer mandshuricum; - Padus racemosa; - Ulmus laciniata
Low	443	4	东北 Northeast	0.9	13.9	9.6	2水曲柳; 1紫椴; 1红松; 1五角枫; 1蒙古栎; 1白桦; 1春榆; +东北槭; +胡桃楸; -香杨; -黄檗; -千金榆; -朝鲜槐; -稠李; -茶条槭; -裂叶榆 2 Fraxinus mandshurica; 1 Tilia amurensis; 1 Pinus koraiensis; 1 Acer pictum subsp. mono; 1 Quercus mongolica; 1 Betula platyphylla; 1 Ulmus davidiana var. japonica; + Acer mandshuricum; + Juglans mandshurica; - Populus koreana; - Phellodendron amurense; - Carpinus cordata; - Maackia amurensis; - Padus racemosa; - Acer ginnala; - Ulmus laciniata
Medium	430	5	东北 Northeast	0.9	14.8	9.7	2红松; 2水曲柳; 1紫椴; 1蒙古栎; 1五角枫; 1三花槭; 1春榆; 1白桦; +山杨; +东北槭; +胡桃楸; -朝鲜槐; -硕桦; -稠李; -茶条槭; -青楷槭; -香杨; -黄檗 2 Pinus koraiensis; 2 Fraxinus mandshurica; 1 Tilia amurensis; 1 Quercus mongolica; 1 Acer pictum subsp. mono; 1 Acer triflorum; 1 Ulmus davidiana var. japonica; 1 Betula platyphylla; + Populus davidiana; + Acer mandshuricum; + Juglans mandshurica; - Maackia amurensis; - Betula costata; - Padus racemosa; - Acer ginnala; - Acer tegmentosum; - Populus koreana; - Phellodendron amurense
High	447	3	东北 Northeast	0.9	12.4	8.8	2水曲柳; 2白桦; 1红松; 1紫椴; 1蒙古栎; 1五角枫; 1三花槭; 1春榆; +香杨; -山杨; -朝鲜槐; -硕桦; -东北槭; -稠李; -辽椴; -胡桃楸; -茶条槭; -裂叶榆; -黄檗 2 Fraxinus mandshurica; 2 Betula platyphylla; 1 Pinus koraiensis; 1 Tilia amurensis; 1 Quercus mongolica; 1 Acer pictum subsp. mono; 1 Acer triflorum; 1 Ulmus davidiana var. japonica; + Populus koreana; - Populus davidiana; - Maackia amurensis; - Betula costata; - Acer mandshuricum; - Padus racemosa; - Tilia mandshurica; - Juglans mandshurica; - Acer ginnala; - Ulmus laciniate; - Phellodendron amurense

样地 Sample plot	海拔 Altitude (m)	坡度 Slope (°)	坡向 Aspect	郁闭度 Canopy density	平均胸径 Mean diameter at breast height (cm)	平均树高 Mean tree height (m)	主要乔木树种组成 Composition of main tree species
CK	453	1	东北 Northeast	0.9	14.6	9.7	3春榆; 2水曲柳; 1紫椴; 1胡桃楸; 1五角枫; +红松; +蒙古栎; +黄檗; -山杨; -朝鲜槐; -三花槭; -硕桦; -白桦; -东北槭; -稠李; -裂叶榆 3 Ulmus davidiana var. japonica; 2 Fraxinus mandshurica; 1 Tilia amurensis; 1 Juglans mandshurica; 1 Acer pictum subsp. mono; + Pinus koraiensis; + Quercus mongolica; + Phellodendron amurense; - Populus davidiana; - Maackia amurensis; - Acer triflorum; - Betula costata; - Betula platyphylla; - Acer mandshuricum; - Padus racemosa; - Ulmus laciniata
Low	443	4	东北 Northeast	0.9	13.9	9.6	2水曲柳; 1紫椴; 1红松; 1五角枫; 1蒙古栎; 1白桦; 1春榆; +东北槭; +胡桃楸; -香杨; -黄檗; -千金榆; -朝鲜槐; -稠李; -茶条槭; -裂叶榆 2 Fraxinus mandshurica; 1 Tilia amurensis; 1 Pinus koraiensis; 1 Acer pictum subsp. mono; 1 Quercus mongolica; 1 Betula platyphylla; 1 Ulmus davidiana var. japonica; + Acer mandshuricum; + Juglans mandshurica; - Populus koreana; - Phellodendron amurense; - Carpinus cordata; - Maackia amurensis; - Padus racemosa; - Acer ginnala; - Ulmus laciniata
Medium	430	5	东北 Northeast	0.9	14.8	9.7	2红松; 2水曲柳; 1紫椴; 1蒙古栎; 1五角枫; 1三花槭; 1春榆; 1白桦; +山杨; +东北槭; +胡桃楸; -朝鲜槐; -硕桦; -稠李; -茶条槭; -青楷槭; -香杨; -黄檗 2 Pinus koraiensis; 2 Fraxinus mandshurica; 1 Tilia amurensis; 1 Quercus mongolica; 1 Acer pictum subsp. mono; 1 Acer triflorum; 1 Ulmus davidiana var. japonica; 1 Betula platyphylla; + Populus davidiana; + Acer mandshuricum; + Juglans mandshurica; - Maackia amurensis; - Betula costata; - Padus racemosa; - Acer ginnala; - Acer tegmentosum; - Populus koreana; - Phellodendron amurense
High	447	3	东北 Northeast	0.9	12.4	8.8	2水曲柳; 2白桦; 1红松; 1紫椴; 1蒙古栎; 1五角枫; 1三花槭; 1春榆; +香杨; -山杨; -朝鲜槐; -硕桦; -东北槭; -稠李; -辽椴; -胡桃楸; -茶条槭; -裂叶榆; -黄檗 2 Fraxinus mandshurica; 2 Betula platyphylla; 1 Pinus koraiensis; 1 Tilia amurensis; 1 Quercus mongolica; 1 Acer pictum subsp. mono; 1 Acer triflorum; 1 Ulmus davidiana var. japonica; + Populus koreana; - Populus davidiana; - Maackia amurensis; - Betula costata; - Acer mandshuricum; - Padus racemosa; - Tilia mandshurica; - Juglans mandshurica; - Acer ginnala; - Ulmus laciniate; - Phellodendron amurense

物种 Species	林层 Forest strata	划分I和II组的方法 Method used to differentiate between mature (I) and immature (II) trees	组别 Cohort		监测株数 Number of stems	耐阴性 Shade- tolerance
白桦 Betula platyphylla	C	树高胸径分布法 DBH-H distribution	I (53.5): DBH ≥ 22 cm	II (43.5): DBH < 22 cm	178	喜光 LD
东北槭 Acer mandshuricum	C	树高胸径分布法 DBH-H distribution	I (87.4): DBH ≥ 8 cm	II (55.6): DBH < 8 cm	270	喜光 LD
春榆 Ulmus davidiana var. japonica	C	树高胸径分布法 DBH-H distribution	I (67.8): DBH ≥ 12 cm	II (39.2): DBH < 12 cm	>627	喜光且耐阴 LD and ST
硕桦 Betula costata	C	最大树高法 H_max	I: H ≥ 10.2 m	II: H < 10.2 m	7	喜光 LD
红松 Pinus koraiensis	C	树高胸径分布法 DBH-H distribution	I (62.5): DBH ≥ 20 cm	II (42.4): DBH < 20 cm	387	喜光 LD
胡桃楸 Juglans mandshurica	C	最大树高法 H_max	I (50.0): H ≥ 11.9 m	II (35.9): H < 11.9 m	90	喜光 LD
朝鲜槐 Maackia amurensis	C	树高胸径分布法 DBH-H distribution	I (60.3): DBH ≥ 12 cm	II (47.3): DBH < 12 cm	94	喜光 LD
黄檗 Phellodendron amurense	C	最大树高法 H_max	I (66.1): H ≥ 9.3 m	II (52.9): H < 9.3 m	61	喜光 LD
辽椴 Tilia mandshurica	C	最大树高法 H_max	I: H ≥ 11 m	II: H < 11 m	16	喜光 LD
裂叶榆 Ulmus laciniata	C	最大树高法 H_max	I (68.4): H ≥ 10.2 m	II (52.1): H < 10.2 m	>15	耐阴 ST
蒙古栎 Quercus mongolica	C	树高胸径分布法 DBH-H distribution	I (59.2): DBH ≥ 20 cm	II (44.2): DBH < 20 cm	177	喜光 LD
三花槭 Acer triflorum	C	树高胸径分布法 DBH-H distribution	I (86.6): DBH ≥ 13 cm	II (50.0): DBH < 13 cm	>379	耐阴 ST
五角枫 Acer pictum subsp. mono	C	树高胸径分布法 DBH-H distribution	I (81.3): DBH ≥ 13 cm	II (60.8): DBH < 13 cm	851	喜光 LD
山杨 Populus davidiana	C	最大树高法 H_max	I (28.0): H ≥ 11.7 m	II (20.6): H < 11.7 m	20	喜光 LD
水曲柳 Fraxinus mandschurica	C	树高胸径分布法 DBH-H distribution	I (60.1): DBH ≥ 21 cm	II (49.6): DBH < 21 cm	323	喜光 LD
香杨 Populus koreana	C	最大树高法 H_max	I: H ≥ 13.7 m	II: H < 13.7 m	10	喜光 LD
紫椴 Tilia amurensis	C	树高胸径分布法 DBH-H distribution	I (68.3): DBH ≥ 18 cm	II (43.6): DBH < 18 cm	493	喜光 LD
暴马丁香 Syringa reticulata subsp. amurensis	U	-	III		>171	耐阴 ST
茶条槭 Acer ginnala	U	-	III		20	喜光 LD
稠李 Padus racemosa	U	-	III		32	耐阴 ST
簇毛槭 Acer barbinerve	U	-	III		34	耐阴 ST
花楸树 Sorbus pohuashanensis	U	-	III		1	耐阴 ST
楤木 Aralia elata	U	-	III		1	喜光 LD
毛榛 Corylus mandshurica	U	-	III		16	耐阴 ST
千金榆 Carpinus cordata	U	-	III		1	耐阴 ST
青楷槭 Acer tegmentosum	U	-	III		44	喜光 LD
山荆子 Malus baccata	U	-	III		68	耐阴 ST
鼠李 Rhamnus davurica	U	-	III		9	耐阴 ST
卫矛 Euonymus alatus	U	-	III		>12	喜光且耐阴 LD and ST

物种 Species	林层 Forest strata	划分I和II组的方法 Method used to differentiate between mature (I) and immature (II) trees	组别 Cohort		监测株数 Number of stems	耐阴性 Shade- tolerance
白桦 Betula platyphylla	C	树高胸径分布法 DBH-H distribution	I (53.5): DBH ≥ 22 cm	II (43.5): DBH < 22 cm	178	喜光 LD
东北槭 Acer mandshuricum	C	树高胸径分布法 DBH-H distribution	I (87.4): DBH ≥ 8 cm	II (55.6): DBH < 8 cm	270	喜光 LD
春榆 Ulmus davidiana var. japonica	C	树高胸径分布法 DBH-H distribution	I (67.8): DBH ≥ 12 cm	II (39.2): DBH < 12 cm	>627	喜光且耐阴 LD and ST
硕桦 Betula costata	C	最大树高法 H_max	I: H ≥ 10.2 m	II: H < 10.2 m	7	喜光 LD
红松 Pinus koraiensis	C	树高胸径分布法 DBH-H distribution	I (62.5): DBH ≥ 20 cm	II (42.4): DBH < 20 cm	387	喜光 LD
胡桃楸 Juglans mandshurica	C	最大树高法 H_max	I (50.0): H ≥ 11.9 m	II (35.9): H < 11.9 m	90	喜光 LD
朝鲜槐 Maackia amurensis	C	树高胸径分布法 DBH-H distribution	I (60.3): DBH ≥ 12 cm	II (47.3): DBH < 12 cm	94	喜光 LD
黄檗 Phellodendron amurense	C	最大树高法 H_max	I (66.1): H ≥ 9.3 m	II (52.9): H < 9.3 m	61	喜光 LD
辽椴 Tilia mandshurica	C	最大树高法 H_max	I: H ≥ 11 m	II: H < 11 m	16	喜光 LD
裂叶榆 Ulmus laciniata	C	最大树高法 H_max	I (68.4): H ≥ 10.2 m	II (52.1): H < 10.2 m	>15	耐阴 ST
蒙古栎 Quercus mongolica	C	树高胸径分布法 DBH-H distribution	I (59.2): DBH ≥ 20 cm	II (44.2): DBH < 20 cm	177	喜光 LD
三花槭 Acer triflorum	C	树高胸径分布法 DBH-H distribution	I (86.6): DBH ≥ 13 cm	II (50.0): DBH < 13 cm	>379	耐阴 ST
五角枫 Acer pictum subsp. mono	C	树高胸径分布法 DBH-H distribution	I (81.3): DBH ≥ 13 cm	II (60.8): DBH < 13 cm	851	喜光 LD
山杨 Populus davidiana	C	最大树高法 H_max	I (28.0): H ≥ 11.7 m	II (20.6): H < 11.7 m	20	喜光 LD
水曲柳 Fraxinus mandschurica	C	树高胸径分布法 DBH-H distribution	I (60.1): DBH ≥ 21 cm	II (49.6): DBH < 21 cm	323	喜光 LD
香杨 Populus koreana	C	最大树高法 H_max	I: H ≥ 13.7 m	II: H < 13.7 m	10	喜光 LD
紫椴 Tilia amurensis	C	树高胸径分布法 DBH-H distribution	I (68.3): DBH ≥ 18 cm	II (43.6): DBH < 18 cm	493	喜光 LD
暴马丁香 Syringa reticulata subsp. amurensis	U	-	III		>171	耐阴 ST
茶条槭 Acer ginnala	U	-	III		20	喜光 LD
稠李 Padus racemosa	U	-	III		32	耐阴 ST
簇毛槭 Acer barbinerve	U	-	III		34	耐阴 ST
花楸树 Sorbus pohuashanensis	U	-	III		1	耐阴 ST
楤木 Aralia elata	U	-	III		1	喜光 LD
毛榛 Corylus mandshurica	U	-	III		16	耐阴 ST
千金榆 Carpinus cordata	U	-	III		1	耐阴 ST
青楷槭 Acer tegmentosum	U	-	III		44	喜光 LD
山荆子 Malus baccata	U	-	III		68	耐阴 ST
鼠李 Rhamnus davurica	U	-	III		9	耐阴 ST
卫矛 Euonymus alatus	U	-	III		>12	喜光且耐阴 LD and ST

	林木株数 Number of stems			胸高断面积 Basal area (m²·hm^-2)
	I	II	III	I	II	III
伐前 Pre-harvesting
CK	354	516	76	23.01	3.63	0.36
Low	345	621	60	25.77	3.36	0.26
Medium	339	589	71	25.86	3.67	0.39
High	296	595	134	23.63	3.41	0.35
伐后 Post-harvesting
CK	354	516	76	23.01	3.63	0.36
Low	303 (12%)	580 (7%)	48 (20%)	21.24 (18%)	3.11 (7%)	0.25 (4%)
Medium	251 (26%)	504 (14%)	58 (18%)	16.94 (34%)	3.25 (11%)	0.27 (31%)
High	149 (50%)	379 (36%)	68 (49%)	8.47 (64%)	2.61 (23%)	0.21 (40%)