| 使用自由软件和便携式光学显微镜研究土壤孔隙特征 |
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| 作者姓名： | L. F. PIRES F. S. BORGES S. PASSONI A. B. PEREIRA |
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| 作者单位： | Department of Physics, State University of Ponta Grossa (UEPG);Department of Soil Science, State University of Ponta Grossa (UEPG) |
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| 基金项目： | the Brazilian agencies'Conselho Nacional de Desenvolvimento Científico e Tecnológico'(CNPq)，'Funda(c)āo Araucária' |
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| 摘 要： | Total porosity (TP), determined by image analysis, pore type and pore size distribution were evaluated on impregnated soil blocks from an undisturbed Brazilian sandy loam soil using a digital portable optical microscope. The free software Image J (version 1.40g) was used for image analysis. Procedures for soil image collection and analysis were presented. The image analysis allowed the evaluation of pore sizes with diameters ranging from 20 to >1 000 μm. The following types of pores were also obtained: rounded, elongated and intermediate. The results allowed the characterization of the soil as moderately porous (TP=21.6%). Rounded, intermediate and elongated pores were responsible for 11.6%, 31.7% and 56.7% of TP. In relation to pore size 51.1% of TP was in the 100-500 μm size class and a third of TP came from the pores larger than 500 μm.
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| 关 键 词： | image analysis soil porosity soil structure pore size distribution |
| 收稿时间： | 27 December 2012 |
Soil pore characterization using free software and a portable optical microscope |
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| L. F. PIRES,F. S. BORGES,S. PASSONI,A. B. PEREIRA.Soil pore characterization using free software and a portable optical microscope[J].Pedosphere,2013,23(4):503-510. |
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| Authors: | L F PIRES F S BORGES S PASSONI and A B PEREIRA |
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| Institution: | 1. Department of Physics, State University of Ponta Grossa(UEPG), 84.030-900, Ponta Grossa Brazil
2. Department of Soil Science, State University of Ponta Grossa(UEPG), 84.030-900, Ponta Grossa Brazil |
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| Abstract: | Total porosity (TP), determined by image analysis, pore type and pore size distribution were evaluated on impregnated soil blocks from an undisturbed Brazilian sandy loam soil using a digital portable optical microscope. The free software Image J (version 1.40g) was used for image analysis. Procedures for soil image collection and analysis were presented. The image analysis allowed the evaluation of pore sizes with diameters ranging from 20 to > 1000 μm. The following types of pores were also obtained: rounded, elongated and intermediate. The results allowed the characterization of the soil as moderately porous (TP = 21.6%). Rounded, intermediate and elongated pores were responsible for 11.6%, 31.7% and 56.7% of TP. In relation to pore size 51.1% of TP was in the 100–500 μm size class and a third of TP came from the pores larger than 500 μm. |
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| Keywords: | image analysis soil porosity soil structure pore size distribution |
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