| 土壤粒度组成分析方法对比 |
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| 引用本文： | 李慧茹,刘博,王汝幸,刘伟,方依,杨东亮,邹学勇.土壤粒度组成分析方法对比[J].中国沙漠,2018,38(3):619-627. |
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| 作者姓名： | 李慧茹 刘博 王汝幸 刘伟 方依 杨东亮 邹学勇 |
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| 作者单位： | 1. 北京师范大学 地表过程与资源生态国家重点实验室, 北京 100875;2. 北京师范大学 防沙治沙教育部工程研究中心, 北京 100875;3. 北京师范大学 中国沙漠研究中心, 北京 100875 |
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| 基金项目： | 国家自然科学基金重点项目（41330746） |
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| 摘 要： | 土壤粒度组成测定有多种方法，每种方法的原理不同，测得的结果存在显著差异。阐明不同方法测得粒组成存在差异的原因，选择恰当的方法或者建立不同测定方法之间的换算关系，对准确地确定土壤粒度组成具有重要意义。采用5种方法对5种土壤样品进行粒度测定，结果表明：吸管法测得平均粒径最小，且细颗粒含量较高；扫描电镜法测得平均粒径最大，且粗颗粒含量较高；除CaCO3含量最高的土壤样品外，其他4种土壤样品用不同测定方法测得的粒度分布范围大致相同。吸管法与激光衍射法测得颗粒含量之间存在显著相关关系，扫描电镜法与筛析-激光衍射法的粗颗粒之间也存在显著相关关系。筛析-激光衍射法的测定结果适用于土壤风蚀研究，扫描电镜法适用于测定粒度分布范围较窄的土壤样品，激光衍射法适用于测定团聚体较少的土壤样品。
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| 关 键 词： | 土壤粒度组成 吸管法 筛析-激光衍射法 扫描电镜法 激光衍射法 |
| 收稿时间： | 2016-10-15 |
| 修稿时间： | 2017-01-16 |
Particle-size Distribution Affected by Testing Method |
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| Li Huiru,Liu Bo,Wang Ruxing,Liu Wei,Fang Yi,Yang Dongliang,Zou Xueyong.Particle-size Distribution Affected by Testing Method[J].Journal of Desert Research,2018,38(3):619-627. |
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| Authors: | Li Huiru Liu Bo Wang Ruxing Liu Wei Fang Yi Yang Dongliang Zou Xueyong |
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| Institution: | 1. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China;2. MOE Engineering Center of Desertification and Blown-sand Control, Beijing Normal University, Beijing 100875, China;3. China Center of Desert Research, Beijing Normal University, Beijing 100875, China |
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| Abstract: | There are many methods for determining particle-size distribution of soil sample. As the principle of each method is different, the results are not the same. In order to measure the particle size precisely, it is very important to reveal the reasons for the different results obtained by different methods, to select proper methods, and to establish the conversion relationship. In this study, we used five methods to measure particle-size distribution of five soil samples. The results showed that the average particle size measured by Sieve-pipette method (SPM) is the smallest among all the methods, with the largest portion of fine particles; while the average particle size measured by Scanning Electron Microscopy (SEM) is the biggest, with the largest portion of coarse particles. Except the soil sample with high CaCO3 content, the particle size distributions of all other four samples are very similar when measured using different methods. The conversion relationship could be established between SPM and LD, while the conversion relationship could be established between S-LD1 and SEM only for sand and silt fractions. Generally speaking, the results measured by S-LD1 are the most reliable in study of wind erosion. The results measured by SEM are suitable for samples with narrow particle size distributions, and the results measured by laser diffraction method (LD) are reliable for soils with lesssoil aggregate. |
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| Keywords: | soil particle-size distribution sieve-pipette method sieving-laser diffraction scanning electron microscopy laser diffraction |
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