植物生态学报 ›› 2008, Vol. 32 ›› Issue (3): 632-638.DOI: 10.3773/j.issn.1005-264x.2008.03.012
李志勇1,2,3(), 陈建军2, 王彦辉3,*(
), 于澎涛3, 杜士才4, 何萍4, 段健5
收稿日期:
2007-07-16
接受日期:
2008-01-10
出版日期:
2008-07-16
发布日期:
2008-05-30
通讯作者:
王彦辉
作者简介:
*E-mail:wangyh@caf.ac.cn基金资助:
LI Zhi-Yong1,2,3(), CHEN Jian-Jun2, WANG Yan-Hui3,*(
), YU Peng-Tao3, DU Shi-Cai4, HE Ping4, DUAN Jian5
Received:
2007-07-16
Accepted:
2008-01-10
Online:
2008-07-16
Published:
2008-05-30
Contact:
WANG Yan-Hui
摘要:
在属于酸雨区的重庆市铁山坪林场,选择在马尾松(Pinus massoniana)纯林火烧迹地上人工营造的木荷(Schima superba)纯林,采用钻取土芯法调查木荷对土壤化学性质的影响,并与毗邻的同时造林但未遭受火烧的马尾松纯林比较。结果表明,木荷纯林0~20和20~60 cm土层的pH值分别为3.61和3.77,盐基饱和度分别为4.68%和7.92%,而马尾松纯林的pH值分别为3.78和3.88,盐基饱和度分别为9.25%和16.32%。与马尾松纯林相比,木荷纯林土壤的交换性盐基离子(K+、Na+、Ca2+和Mg2+)和全磷含量普遍低,而酸性阳离子Al3+、Fe3+和H+含量明显偏高(p<0.05)。结果说明,并非木荷作为阔叶林对酸化土壤的改良作用就好于作为针叶林的马尾松,木荷纯林导致了土壤酸化加剧,养分非常缺乏。因此,在酸雨区土壤酸化条件下,如果采用木荷营造防火林带或者进行马尾松纯林改造时,不宜集中大片营造木荷纯林,以避免对土壤环境产生不利影响。
李志勇, 陈建军, 王彦辉, 于澎涛, 杜士才, 何萍, 段健. 重庆酸雨区人工木荷林对土壤化学性质的影响. 植物生态学报, 2008, 32(3): 632-638. DOI: 10.3773/j.issn.1005-264x.2008.03.012
LI Zhi-Yong, CHEN Jian-Jun, WANG Yan-Hui, YU Peng-Tao, DU Shi-Cai, HE Ping, DUAN Jian. EFFECTS OF SCHIMA SUPERBA PLANTATIONS ON SOIL CHEMICAL PROPERTIES IN THE ACID RAIN REGION OF CHONGQING, SOUTHWESTERN CHINA. Chinese Journal of Plant Ecology, 2008, 32(3): 632-638. DOI: 10.3773/j.issn.1005-264x.2008.03.012
林分 Stand | 样地编号 Plot No. | 密度 Density (stems·hm-2) | 优势木 Dominant tree | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
平均高度 Mean height (m) | 平均胸径 Mean diameter at breast height (cm) | 平均叶量损失率 Mean defoliation percentage (%) | ||||||||||||||||||
火烧迹地人工木荷纯林 Pure Schima superba plantation on the burned area | 1 | 1 222 | 5.2 | 7.8 | 11 | |||||||||||||||
2 | 1 278 | 5.1 | 7.3 | 12 | ||||||||||||||||
3 | 1 167 | 5.5 | 8.0 | 5 | ||||||||||||||||
未烧马尾松纯林 Unburned Pinus massoniana plantation | 4 | 1 167 | 9.4 | 14.5 | 25 | |||||||||||||||
5 | 1 100 | 9.9 | 15.2 | 10 | ||||||||||||||||
6 | 1 333 | 9.1 | 14.1 | 53 |
表1 调查样地的概况
Table 1 Survey of the sampling plots
林分 Stand | 样地编号 Plot No. | 密度 Density (stems·hm-2) | 优势木 Dominant tree | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
平均高度 Mean height (m) | 平均胸径 Mean diameter at breast height (cm) | 平均叶量损失率 Mean defoliation percentage (%) | ||||||||||||||||||
火烧迹地人工木荷纯林 Pure Schima superba plantation on the burned area | 1 | 1 222 | 5.2 | 7.8 | 11 | |||||||||||||||
2 | 1 278 | 5.1 | 7.3 | 12 | ||||||||||||||||
3 | 1 167 | 5.5 | 8.0 | 5 | ||||||||||||||||
未烧马尾松纯林 Unburned Pinus massoniana plantation | 4 | 1 167 | 9.4 | 14.5 | 25 | |||||||||||||||
5 | 1 100 | 9.9 | 15.2 | 10 | ||||||||||||||||
6 | 1 333 | 9.1 | 14.1 | 53 |
林分 Stand | 土壤层次 Soil layer (cm) | 交换性阳离子 Exchangeable cation (cmol (+)·kg-1) | 盐基饱和度 Base satur- ation (%) | pH (KCl) | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
K+ | Na+ | Ca2+ | Mg2+ | Al3+ | Fe3+ | Mn2+ | H+ | ||||
火烧迹地人工木荷纯林Schima | 0~20 | (0.020 2± 0.001 9)b | (0.084 5± 0.001 0)a | (0.165 2± 0.000 4)d | (0.062 4± 0.008 7)b | (3.118 3± 0.011 3)a | (0.076 8± 0.006 2)a | (0.001 7± 0.000 3)d | (3.575 4± 0.012 8)a | 4.68 | (3.61± 0.01) |
superba plantation on the burned area | 20~60 | (0.014 7± 0.001 3)b | (0.102 8± 0.002 2)a | (0.374 4± 0.005 6)b | (0.055 0± 0.004 9)b | (2.929 2± 0.008 4)a | (0.023 8± 0.003 5)c | (0.003 0± 0.000 6)c | (3.395 7± 0.010 4)a | 7.92 | (3.77± 0.01) |
未烧马尾松纯林 Unburned | 0~20 | (0.047 2± 0.003 3)a | (0.093 8± 0.009 9)a | (0.277 3± 0.008 4)c | (0.059 2± 0.009 0)b | (2.180 5± 0.214 6)b | (0.044 5± 0.004 4)b | (0.014 3± 0.002 7)b | (2.446 7± 0.208 0)b | 9.25 | (3.78± 0.01) |
Pinus massoniana plantation | 20~60 | (0.018 4± 0.002 5)b | (0.104 2± 0.003 5)a | (0.665 4± 0.007 4)a | (0.150 5± 0.010 2)a | (2.114 4± 0.009 6)b | (0.006 6± 0.000 4)d | (0.109 7± 0.008 7)a | (2.491 3± 0.009 3)b | 16.32 | (3.88± 0.02) |
表2 火烧迹地人工木荷纯林和未烧马尾松纯林各层土壤的交换性阳离子、盐基饱和度和pH值
Table 2 Contents of exchangeable cations, base saturation and pH values in the soil layers for Schima superba plantation on the burned area and unburned Pinus massoniana plantation
林分 Stand | 土壤层次 Soil layer (cm) | 交换性阳离子 Exchangeable cation (cmol (+)·kg-1) | 盐基饱和度 Base satur- ation (%) | pH (KCl) | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
K+ | Na+ | Ca2+ | Mg2+ | Al3+ | Fe3+ | Mn2+ | H+ | ||||
火烧迹地人工木荷纯林Schima | 0~20 | (0.020 2± 0.001 9)b | (0.084 5± 0.001 0)a | (0.165 2± 0.000 4)d | (0.062 4± 0.008 7)b | (3.118 3± 0.011 3)a | (0.076 8± 0.006 2)a | (0.001 7± 0.000 3)d | (3.575 4± 0.012 8)a | 4.68 | (3.61± 0.01) |
superba plantation on the burned area | 20~60 | (0.014 7± 0.001 3)b | (0.102 8± 0.002 2)a | (0.374 4± 0.005 6)b | (0.055 0± 0.004 9)b | (2.929 2± 0.008 4)a | (0.023 8± 0.003 5)c | (0.003 0± 0.000 6)c | (3.395 7± 0.010 4)a | 7.92 | (3.77± 0.01) |
未烧马尾松纯林 Unburned | 0~20 | (0.047 2± 0.003 3)a | (0.093 8± 0.009 9)a | (0.277 3± 0.008 4)c | (0.059 2± 0.009 0)b | (2.180 5± 0.214 6)b | (0.044 5± 0.004 4)b | (0.014 3± 0.002 7)b | (2.446 7± 0.208 0)b | 9.25 | (3.78± 0.01) |
Pinus massoniana plantation | 20~60 | (0.018 4± 0.002 5)b | (0.104 2± 0.003 5)a | (0.665 4± 0.007 4)a | (0.150 5± 0.010 2)a | (2.114 4± 0.009 6)b | (0.006 6± 0.000 4)d | (0.109 7± 0.008 7)a | (2.491 3± 0.009 3)b | 16.32 | (3.88± 0.02) |
林分 Stand | 土壤层次 Soil layer (cm) | 全N Total N (g·kg-1) | 全P Total P (g·kg-1) | 有机质 Organic matter (g·kg-1) |
---|---|---|---|---|
火烧迹地人工木荷纯林 Schima superba plantation on the burned area | 0~20 | (1.030 2±0.085 3)a | (0.272 9±0.007 1)b | (26.260 0±1.673 9)a |
20~60 | (0.697 3±0.052 6)b | (0.257 7±0.006 5)b | (12.278 7±1.203 9)b | |
未烧马尾松纯林 Unburned Pinus massoniana plantation | 0~20 | (0.968 9±0.093 1)a | (0.385 9±0.012 8)a | (23.460 4±2.198 6)a |
20~60 | (0.934 6±0.072 0)a | (0.266 5±0.007 8)b | (9.802 1±1.035 1)c |
表3 火烧迹地人工木荷纯林和未烧马尾松纯林各层土壤的全N、全P和有机质含量
Table 3 Contents of total N, total P and organic matter in the soil layers for Schima superba plantation on the burned area and unburned Pinus massoniana plantation
林分 Stand | 土壤层次 Soil layer (cm) | 全N Total N (g·kg-1) | 全P Total P (g·kg-1) | 有机质 Organic matter (g·kg-1) |
---|---|---|---|---|
火烧迹地人工木荷纯林 Schima superba plantation on the burned area | 0~20 | (1.030 2±0.085 3)a | (0.272 9±0.007 1)b | (26.260 0±1.673 9)a |
20~60 | (0.697 3±0.052 6)b | (0.257 7±0.006 5)b | (12.278 7±1.203 9)b | |
未烧马尾松纯林 Unburned Pinus massoniana plantation | 0~20 | (0.968 9±0.093 1)a | (0.385 9±0.012 8)a | (23.460 4±2.198 6)a |
20~60 | (0.934 6±0.072 0)a | (0.266 5±0.007 8)b | (9.802 1±1.035 1)c |
林分 Stand | 土壤层次 Soil layer (cm) | 干重 Dry weight (g·m-2) | 长度 Length (m·m-2) | 表面积 Surface area (m2·m-2) | 体积 Volume (cm3·m-2) | 根尖数 Root tip number (no.·m-2) |
---|---|---|---|---|---|---|
火烧迹地人工木荷纯林 Schima superba plantation on the burned area | 0~20 | (26.78± 0.97)a | (153.84± 6.83)a | (0.384 3± 0.015 3)a | (77.60± 2.67)b | (20 701± 1 514)a |
20~60 | (16.89± 0.41)b | (82.23± 4.19)b | (0.253 4± 0.094 0)b | (67.32± 3.48)c | (12 492± 718)b | |
合计 Total | 43.67 | 236.07 | 0.637 7 | 144.92 | 33 193 | |
未烧马尾松纯林 Unburned Pinus massoniana plantation | 0~20 | (15.16± 0.65)b | (85.05± 5.10)b | (0.258 0± 0.013 0)b | (63.12± 3.71)c | (10 016± 1 048)b |
20~60 | (24.48± 0.89)a | (146.29± 7.28)a | (0.438 5± 0.011 0)a | (120.36± 3.19)a | (13 507± 681)b | |
合计 Total | 39.63 | 231.34 | 0.696 5 | 183.48 | 23 523 |
表4 火烧迹地人工木荷纯林和未烧马尾松纯林各层土壤的细根生长特征
Table 4 Growth characteristics of fine roots in the soil layers for Schima superba plantation on the burned area and unburned Pinus massoniana plantation
林分 Stand | 土壤层次 Soil layer (cm) | 干重 Dry weight (g·m-2) | 长度 Length (m·m-2) | 表面积 Surface area (m2·m-2) | 体积 Volume (cm3·m-2) | 根尖数 Root tip number (no.·m-2) |
---|---|---|---|---|---|---|
火烧迹地人工木荷纯林 Schima superba plantation on the burned area | 0~20 | (26.78± 0.97)a | (153.84± 6.83)a | (0.384 3± 0.015 3)a | (77.60± 2.67)b | (20 701± 1 514)a |
20~60 | (16.89± 0.41)b | (82.23± 4.19)b | (0.253 4± 0.094 0)b | (67.32± 3.48)c | (12 492± 718)b | |
合计 Total | 43.67 | 236.07 | 0.637 7 | 144.92 | 33 193 | |
未烧马尾松纯林 Unburned Pinus massoniana plantation | 0~20 | (15.16± 0.65)b | (85.05± 5.10)b | (0.258 0± 0.013 0)b | (63.12± 3.71)c | (10 016± 1 048)b |
20~60 | (24.48± 0.89)a | (146.29± 7.28)a | (0.438 5± 0.011 0)a | (120.36± 3.19)a | (13 507± 681)b | |
合计 Total | 39.63 | 231.34 | 0.696 5 | 183.48 | 23 523 |
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