| 九曲溪生态保护区不同林地土壤团聚体分形特征 |
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| 引用本文： | 李灵,梁彦兰,张玉,江慧华,陈家晖,周艳,俞建安.九曲溪生态保护区不同林地土壤团聚体分形特征[J].西南林学院学报,2012(5):1-7. |
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| 作者姓名： | 李灵 梁彦兰 张玉 江慧华 陈家晖 周艳 俞建安 |
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| 作者单位： | [1]武夷学院福建省高校绿色化工技术重点实验室 生态与资源工程系,福建武夷山354300 [2]安阳工学院,河南安阳455000 [3]武夷山风景名胜区管理委员会,福建武夷山354300 |
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| 基金项目： | 基金项目：南平市科技局项目（N2009210-3）资助;武夷学院对接南平产业发展专项项目（2011DJ08）资助;武夷学院青年基金项目（XLQ0801）资助;武夷山风景名胜区管理委员会项目（2008-03）资助. |
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| 摘 要： | 对九曲溪生态保护区次生阔叶林、马尾松人工林、竹林和茶园4种类型林地土壤团聚体的分形特征进行分析，探讨分形维数与土壤平均质量直径和几何平均直径及理化性质的关系。结果表明：4种林地土壤团聚体的分形维数均为2．375～2．658（干筛）和2．627—2．863（湿筛），土壤团聚体分形维数在0～20、20—40、40—60cm土层均表现为：阔叶林〈竹林〈马尾松林〈茶园，且均随土层深度的增加而增大；4种林地干筛和湿筛条件下〉0．25mm的团聚体百分数和〉5mm的大团聚体百分数与土壤团聚体分形维数表现为相反的变化趋势，即阔叶林的最大，竹林和马尾松林次之，茶园的最低；而结构体破坏率与土壤团聚体分形维数表现为一致的变化趋势，0-60cm土层为阔叶林（21．31％）〈竹林（26．18％）〈马尾松林（31．98％）〈茶园（38．25％）；土壤团聚体分形维数与平均质量直径、几何平均直径及土壤理化性质关系密切。次生阔叶林土壤疏松，持水能力强，土壤有机质及养分含量高，土壤结构稳定性好；竹林和马尾松林次之；茶园土壤结构稳定性最差。
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| 关 键 词： | 林地 土壤团聚体 分形维数 九曲溪生态保护区 |
Fractal Characteristics of Soil Aggregate Structure Under Typical Forests in Jiuqu Stream Ecological Conservation Area |
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| LI Ling,LIANG Yan-lan,ZHANG Yu,JIANG Hui-hua,CHEN Jia-hui,ZHOU Yan,YU Jian-an.Fractal Characteristics of Soil Aggregate Structure Under Typical Forests in Jiuqu Stream Ecological Conservation Area[J].Journal of Southwest Forestry College,2012(5):1-7. |
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| Authors: | LI Ling LIANG Yan-lan ZHANG Yu JIANG Hui-hua CHEN Jia-hui ZHOU Yan YU Jian-an |
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| Institution: | 1. Key Laboratory of Green Chemical Industry Technology of Fujian Province, Department of Ecology and Resource Engineering, Wuyi College, Wuyishan Fujian 354300, China;2. Anyang Institute of Technology, Anyang Henan 455000, China; 3. Administration Committee of Wuyishan Scenery District, Wuyishan Fujian 354300, China) |
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| Abstract: | The fractal characteristics of soil aggregate structure under 4 typical categories of forests or plantations, i. e. , secondary broad-leaved forest, Pinus massoniana plantation, bamboo plantation and tea plantation in Jiuqu Stream Ecological Conservation Area in Fujian Province were studied, and the relationship between the fractal dimension and soil MWD, GMD, physical and chemical properties was analyzed. The results showed that the fractal dimension of soil aggregate structure of the 4 typical categories of vegetation under the dry and wet sieving conditions was ranged within 2. 375 - 2. 658 and 2. 627 - 2. 863, respectively. The order of fractal dimension of soil aggregate structure sampled at depth of 0 - 20 cm, 20 -40 cm and 40 - 60 cm from the 4 typical categories of vegetation was evergreen broadleaved forest 〈 bamboo plantation 〈 Pinus massoniana plantation 〈 tea plantation, which was increased with the soil depth increment. The percentage of 〉 0.25 mm soil aggregates and 〉 5 mm large soil aggregates from the 4 typical categories of vegetation under the dry and wet sieving conditions displayed the opposite change trend to that of the fractal dimension, which was in the order as evergreen broad-leaved forest 〉 bamboo plantation 〉 Pinus massoniana plantation 〉 tea plantation. The order of soil structure damage rate in the 0 - 60 cm layer was in accordance with the fractal dimension of soil aggregates, i.e. , evergreen broadleaved forest （21.31%） 〈 bamboo plantation （ 26. 18% ） 〈 Pinus massoniana plantation （ 31.98% ） 〈 tea plantation （38.25%）. The fractal dimension of soil aggregates was closely related to soil MWD, GMD, and other physical and chemical properties. The soil under the broad-leaved forest was relatively looser in structure, with stronger water holding capacity, higher contents of soil organic matter and nutrients and more stable soil structure, followed by bamboo plantation, Pinus massoniana plantation, and tea plantation. |
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| Keywords: | forest land soil aggregate fractal dimension Jiuqu Stream Ecological Conservation Area |
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