| 重庆缙云山不同土地利用类型土壤结构对土壤抗剪性能的影响 |
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| 引用本文： | 王云琦,王玉杰,张洪江,肖江伟,吴云,陈林.重庆缙云山不同土地利用类型土壤结构对土壤抗剪性能的影响[J].农业工程学报,2006,22(3):40-45. |
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| 作者姓名： | 王云琦 王玉杰 张洪江 肖江伟 吴云 陈林 |
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| 作者单位： | 1. 北京林业大学水土保持与荒漠化防治教育部重点实验室,北京林业大学水土保持学院,北京,100083
2. 重庆缙云山国家级自然保护区管理局,重庆,400700 |
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| 基金项目： | 国家科技攻关项目;国家林业局长江三峡库区(重庆)森林生态站项目 |
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| 摘 要： | 该文以土壤颗粒组成分维和孔隙分布分维来表征土壤结构，研究土壤结构分形特征对重庆缙云山不同土地利用下土壤抗剪性能的影响，以期为三峡库区水土保持型植被建设提供一定的依据。研究结果表明：机械组成分维和微团聚体组成分维对内摩擦角影响最大，比其它影响因子大一个数量级；影响黏聚力值的因素众多，影响最大的是机械组成分维。在同一土壤含水率下，混交林地易受剪切破坏面在A2层和B层，阔叶林地最易受剪切破坏面在A2层，楠竹林最易受剪切破坏面在C层，灌木林地最易受剪切破坏面在A2层，农地最易受剪切破坏面在B层。
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| 关 键 词： | 土壤结构 分形特征 内摩擦角 黏聚力 抗剪强度 |
| 文章编号： | 1002-6819(2006)03-0040-06 |
| 收稿时间： | 2005-04-12 |
| 修稿时间： | 2005-08-13 |
Impacts of soil structure on shear-resistantance of soil under different land uses in Jinyun Mountain of Chongqing City |
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| Wang Yunqi,Wang Yujie,Zhang Hongjiang,Xiao Jiangwei,Wu Yun and Chen Lin.Impacts of soil structure on shear-resistantance of soil under different land uses in Jinyun Mountain of Chongqing City[J].Transactions of the Chinese Society of Agricultural Engineering,2006,22(3):40-45. |
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| Authors: | Wang Yunqi Wang Yujie Zhang Hongjiang Xiao Jiangwei Wu Yun and Chen Lin |
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| Institution: | 1, Soil and Water Conservation College, Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beejing Forestry University, Beijing 100083, China 2, Chongqing Jinyunshan National Nature Protection Region Management Bureau, Chongqing 400700, China |
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| Abstract: | The soil structure was described with fractal dimensions of particle size distribution(PSD), aggregate size distribution(ASD) and soil pores distribution(SPD). The effects of fractal feature on shear-resistant intensity of soil under different land uses were investigated to offer some bases for soil and water vegetation construction in Three Gorges Reservoir Areas. The results indicate that the fractal dimensions of PSD and ASD have more important effects on internal friction angle according to the regression coefficient, which have one magnitude order larger than other factors, and cohesion is influenced by more factors, and the fractal dimension of PSD has more important effects on cohesion. In the same soil water content, the easiest shear face lied in A2 and B layer in mix wood, in A2 layer in broadleaf forest, in C layer in bamboo forest, in A2 layer in shrub forest and in B layer in arable land. |
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| Keywords: | soil structure fractal feature internal friction angle cohesion shear-resistant intensity |
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