| 利用X射线CT研究多尺度土壤结构 |
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| 引用本文： | 周 虎,李文昭,张中彬,彭新华. 利用X射线CT研究多尺度土壤结构[J]. 土壤学报, 2013, 50(6): 1226-1230 |
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| 作者姓名： | 周 虎 李文昭 张中彬 彭新华 |
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| 作者单位： | 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京农业大学,土壤与农业可持续发展国家重点实验室（中国科学院南京土壤研究所）,土壤与农业可持续发展国家重点实验室中国科学院南京土壤研究所 |
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| 基金项目： | 国家自然科学基金（41101200）和中国科学院知识创新项目（ISSASIP1111）项目资助 |
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| 摘 要： | 土壤结构影响着土壤中的各种物理、化学和生物学过程。近年来，X-射线CT已经发展为研究土壤结构的主要手段。本文首先介绍X射线CT的基本原理，然后总结了主要的CT类型及其在土壤结构研究中的应用。在此基础上，举例介绍了医用CT、工业显微CT和同步辐射显微CT在大土柱（直径100 mm，高200 mm）、小土柱（直径30 mm，高30 mm）和团聚体（直径5 mm）结构研究中的应用，利用CT图像的处理和分析方法，分析了不同大小样品的孔隙分布特征，讨论了综合利用不同类型CT研究不同尺度土壤结构的方法。
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| 关 键 词： | 土壤结构；孔隙结构；CT；图像处理 |
| 收稿时间： | 2013-04-25 |
| 修稿时间： | 2013-07-19 |
Characterization of multi-scale soil structure with X-ray computed tomography |
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| Zhou Hu,Li Wenzhao,Zhang Zhongbin and Peng Xinhua. Characterization of multi-scale soil structure with X-ray computed tomography[J]. Acta Pedologica Sinica, 2013, 50(6): 1226-1230 |
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| Authors: | Zhou Hu Li Wenzhao Zhang Zhongbin Peng Xinhua |
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| Affiliation: | State Key Laboratory of Soil and Sustainable Agriculture (Institute of Soil Science, Chinese Academy of Sciences),Nanjing Agricultural University,State Key Laboratory of Soil and Sustainable Agriculture (Institute of Soil Science, Chinese Academy of Sciences),Peng Xinhua |
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| Abstract: | Soil structure affects the physical, chemical, and biological processes occurring in the soil. X-ray computed tomography (CT) has become an important tool to characterize soil structure in recently years. The principle of X-ray CT was briefly introduced and use of different kinds of CT to study soil structure was summarized first. Then examples of using medical CT, industrial micro-CT, and synchrotron-based micro-CT to scan big soil column (diameter 100 mm, height 200 mm), small soil column (diameter 30 mm, height 30 mm), and soil aggregates (diameter 5 mm), respectively, were presented. Porosity, pore-size distribution, and vertical porosity distribution of different samples were analyzed with image analysis method. Comprehensive study of multi-scale soil structure using different kind of CT was discussed. |
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| Keywords: | Soil Structure Computed Tomography Pore Image Analysis |
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