Chin J Plant Ecol ›› 2012, Vol. 36 ›› Issue (7): 645-654.DOI: 10.3724/SP.J.1258.2012.00645
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LIU Yun-Ke, FAN Chuan, LI Xian-Wei*(), LING Yin-Hua, ZHOU Yi-Gui, FENG Mao-Song, HUANG Cong-De
Published:
2012-07-10
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LI Xian-Wei
LIU Yun-Ke, FAN Chuan, LI Xian-Wei, LING Yin-Hua, ZHOU Yi-Gui, FENG Mao-Song, HUANG Cong-De. Effects of thinning on fine root biomass and carbon storage of subalpine Picea asperata plantation in Western Sichuan Province, China[J]. Chin J Plant Ecol, 2012, 36(7): 645-654.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2012.00645
间伐强度 Thinning intensity | 林分密度 Stand density (plant·hm-2) | 平均树高Average height (m) | 平均胸径Average DBH (cm) | 海拔 Altitude (m) | 坡度 Slope | 坡向 Slope aspect | 土壤类型 Type of soil | 土层厚度 Thickness of soil (cm) | 植物种类 Plant species |
---|---|---|---|---|---|---|---|---|---|
0% | 4 500 | 12.54 | 19.00 | 3 190-3 210 | 18° | 西南 SW | DB | 30-40 | 12a |
10% | 4 050 | 13.28 | 22.91 | 3 190-3 210 | 20° | 西南 SW | DB | 30-40 | 16b |
20% | 3 600 | 13.39 | 23.02 | 3 190-3 210 | 20° | 西南 SW | DB | 30-40 | 18c |
30% | 3 150 | 13.79 | 23.31 | 3 190-3 210 | 20° | 西南 SW | DB | 30-40 | 25d |
50% | 2 250 | 13.22 | 23.97 | 3 190-3 210 | 19° | 西南 SW | DB | 30-40 | 28e |
Table 1 General status of sampling plots in August 2011
间伐强度 Thinning intensity | 林分密度 Stand density (plant·hm-2) | 平均树高Average height (m) | 平均胸径Average DBH (cm) | 海拔 Altitude (m) | 坡度 Slope | 坡向 Slope aspect | 土壤类型 Type of soil | 土层厚度 Thickness of soil (cm) | 植物种类 Plant species |
---|---|---|---|---|---|---|---|---|---|
0% | 4 500 | 12.54 | 19.00 | 3 190-3 210 | 18° | 西南 SW | DB | 30-40 | 12a |
10% | 4 050 | 13.28 | 22.91 | 3 190-3 210 | 20° | 西南 SW | DB | 30-40 | 16b |
20% | 3 600 | 13.39 | 23.02 | 3 190-3 210 | 20° | 西南 SW | DB | 30-40 | 18c |
30% | 3 150 | 13.79 | 23.31 | 3 190-3 210 | 20° | 西南 SW | DB | 30-40 | 25d |
50% | 2 250 | 13.22 | 23.97 | 3 190-3 210 | 19° | 西南 SW | DB | 30-40 | 28e |
间伐强度 Thinning intensity | 林分密度 Stand density (plant·hm-2) | 单株空间 Space of a single tree (m3·plant-1) | 单株根量 Fine root biomass of a single tree (kg·plant-1) | 林分细根生物量 Stand fine root biomass (kg·hm-2) | 根量密度 Root biomass density (kg·m-3) | ||
---|---|---|---|---|---|---|---|
活细根 Live fine root | 死细根 Dead fine root | 总生物量 Total biomass | |||||
0% | 4 500 | 0.888 9 | 0.759 0 (0.009 4)a | 2 875.473 3 (67.899 4)a | 540.176 7 (29.717 1)a | 3 415.650 0 (42.456 1)a | 0.853 9 (0.010 6)a |
10% | 4 050 | 0.987 7 | 0.772 3 (0.013 9)a | 2 657.320 0 (50.062 2)b | 470.363 3 (6.739 3)ab | 3 127.683 3 (56.529 8)b | 0.781 9 (0.014 1)b |
20% | 3 600 | 1.111 1 | 0.800 8 (0.086 4)a | 2 496.400 0 (63.770 1)c | 386.600 0 (33.139 4)bc | 2 883.000 0 (31.096 4)c | 0.720 7 (0.077 8)c |
30% | 3 150 | 1.269 8 | 0.853 7 (0.044 8)b | 2 383.850 0 (51.144 0)d | 305.210 0 (96.618 4)cd | 2 689.060 0 (91.009 1)d | 0.672 3 (0.035 2)d |
50% | 2 250 | 1.777 8 | 1.159 8 (0.035 2)c | 2 377.886 7 (44.008 5)d | 231.730 0 (40.824 5)d | 2 609.616 7 (79.248 4)d | 0.652 4 (0.019 8)d |
Table 2 Effects of different thinning intensity on fine root biomass in Picea asperata
间伐强度 Thinning intensity | 林分密度 Stand density (plant·hm-2) | 单株空间 Space of a single tree (m3·plant-1) | 单株根量 Fine root biomass of a single tree (kg·plant-1) | 林分细根生物量 Stand fine root biomass (kg·hm-2) | 根量密度 Root biomass density (kg·m-3) | ||
---|---|---|---|---|---|---|---|
活细根 Live fine root | 死细根 Dead fine root | 总生物量 Total biomass | |||||
0% | 4 500 | 0.888 9 | 0.759 0 (0.009 4)a | 2 875.473 3 (67.899 4)a | 540.176 7 (29.717 1)a | 3 415.650 0 (42.456 1)a | 0.853 9 (0.010 6)a |
10% | 4 050 | 0.987 7 | 0.772 3 (0.013 9)a | 2 657.320 0 (50.062 2)b | 470.363 3 (6.739 3)ab | 3 127.683 3 (56.529 8)b | 0.781 9 (0.014 1)b |
20% | 3 600 | 1.111 1 | 0.800 8 (0.086 4)a | 2 496.400 0 (63.770 1)c | 386.600 0 (33.139 4)bc | 2 883.000 0 (31.096 4)c | 0.720 7 (0.077 8)c |
30% | 3 150 | 1.269 8 | 0.853 7 (0.044 8)b | 2 383.850 0 (51.144 0)d | 305.210 0 (96.618 4)cd | 2 689.060 0 (91.009 1)d | 0.672 3 (0.035 2)d |
50% | 2 250 | 1.777 8 | 1.159 8 (0.035 2)c | 2 377.886 7 (44.008 5)d | 231.730 0 (40.824 5)d | 2 609.616 7 (79.248 4)d | 0.652 4 (0.019 8)d |
间伐强度 Thinning intensity | 1级根 First root order | 2级根 Second root order | 3级根 Third root order | 4级根 Fourth root order | 5级根 Fifth root order | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm2) | 百分比Percentage (%)1) | |||||
0 | 284.88 (5.58)a | 8.34 | 306.90 (6.01)a | 8.98 | 608.48 (6.31)a | 17.82 | 765.82 (4.51)a | 22.42 | 1 449.5 (20.16)a | 42.44 | ||||
10% | 276.96 (5.21)a | 8.86 | 309.27 (4.33)a | 9.89 | 564.05 (13.65)b | 18.03 | 692.39 (16.56)b | 22.14 | 1 284.9 (18.21)b | 41.09 | ||||
20% | 282.65 (2.84)a | 9.80 | 312.45 (3.65)ab | 10.84 | 526.62 (8.14)c | 18.27 | 622.99 (7.23)c | 21.61 | 1 138.7 (13.52)c | 39.48 | ||||
30% | 321.39 (16.86)b | 11.95 | 317.63 (2.29)b | 11.83 | 493.22 (26.27)d | 18.34 | 524.48 (22.60)d | 19.50 | 1 032.33 (61.59)d | 38.38 | ||||
50% | 340.39 (10.06)c | 13.04 | 317.48 (3.09)b | 12.17 | 478.49 (11.63)d | 18.34 | 494.42 (15.47)d | 18.95 | 978.82 (33.69)d | 37.50 |
Table 3 Fine root biomass of 1st-5th root orders of Picea asperata under different thinning intensity
间伐强度 Thinning intensity | 1级根 First root order | 2级根 Second root order | 3级根 Third root order | 4级根 Fourth root order | 5级根 Fifth root order | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm-2) | 百分比Percentage (%)1) | 生物量Biomass (kg·hm2) | 百分比Percentage (%)1) | |||||
0 | 284.88 (5.58)a | 8.34 | 306.90 (6.01)a | 8.98 | 608.48 (6.31)a | 17.82 | 765.82 (4.51)a | 22.42 | 1 449.5 (20.16)a | 42.44 | ||||
10% | 276.96 (5.21)a | 8.86 | 309.27 (4.33)a | 9.89 | 564.05 (13.65)b | 18.03 | 692.39 (16.56)b | 22.14 | 1 284.9 (18.21)b | 41.09 | ||||
20% | 282.65 (2.84)a | 9.80 | 312.45 (3.65)ab | 10.84 | 526.62 (8.14)c | 18.27 | 622.99 (7.23)c | 21.61 | 1 138.7 (13.52)c | 39.48 | ||||
30% | 321.39 (16.86)b | 11.95 | 317.63 (2.29)b | 11.83 | 493.22 (26.27)d | 18.34 | 524.48 (22.60)d | 19.50 | 1 032.33 (61.59)d | 38.38 | ||||
50% | 340.39 (10.06)c | 13.04 | 317.48 (3.09)b | 12.17 | 478.49 (11.63)d | 18.34 | 494.42 (15.47)d | 18.95 | 978.82 (33.69)d | 37.50 |
Fig. 2 Vertical distribution of fine root biomass under different thinning intensity (mean ± SD, n = 15). Different lowercase letters indicate significant difference between fine root biomass in upper soil layer (p < 0.05); different capital letters indicate significant difference between fine root biomass in lower soil layer (p < 0.05).
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