Method for the physical characterization of substrates using centrifugation
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/256399 |
Resumo: | The characterization of substrate properties supports the correct choice of components and directs management decisions in container cultivation. There are several systems of analysis, however, the routine procedures to determine the water retention curve (WRC) are time consuming and inaccurate. This study proposed a reproducible, less time- consuming, and easy to perform method for physical characterization of substrates. We used Sphagnum peat, coconut powder, carbonized rice husk, expanded vermiculite, and expanded clay in isolation. The WRC was obtained at tensions 0, 10, 50, and 100 hPa using the method of Büchner funnel, the European standard (CEN-EN13041), and by the centrifugation method of samples. In centrifugation, tensions were simulated by combining the angular velocity, sample height, and radius measured from the sample outermost point to the central point of the centrifuge. Three rotations were applied (230; 520 and 730 rpm), testing the centrifugation time for each tension and then the volumetric water content was compared between the methods. The results showed a positive correlation (p < 0.001) between the centrifugation and standard methods, considering that the centrifugation time required for moisture stabilization varied according to the material analyzed and the tension applied. However, the time required to obtain a report was reduced by half. Sample centrifugation is a promising method, ensuring that the tensile force actually acts on the entire sample to determine the water retention curve of the substrate also reducing the duration of the analyses. |
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Avrella, Eduarda DemariPaim, Luciana PintoEmer, Aquélis ArmiliatoVence, Lilia BeatrizFior, Claudimar Sidnei2023-03-29T03:25:00Z20220103-9016http://hdl.handle.net/10183/256399001164251The characterization of substrate properties supports the correct choice of components and directs management decisions in container cultivation. There are several systems of analysis, however, the routine procedures to determine the water retention curve (WRC) are time consuming and inaccurate. This study proposed a reproducible, less time- consuming, and easy to perform method for physical characterization of substrates. We used Sphagnum peat, coconut powder, carbonized rice husk, expanded vermiculite, and expanded clay in isolation. The WRC was obtained at tensions 0, 10, 50, and 100 hPa using the method of Büchner funnel, the European standard (CEN-EN13041), and by the centrifugation method of samples. In centrifugation, tensions were simulated by combining the angular velocity, sample height, and radius measured from the sample outermost point to the central point of the centrifuge. Three rotations were applied (230; 520 and 730 rpm), testing the centrifugation time for each tension and then the volumetric water content was compared between the methods. The results showed a positive correlation (p < 0.001) between the centrifugation and standard methods, considering that the centrifugation time required for moisture stabilization varied according to the material analyzed and the tension applied. However, the time required to obtain a report was reduced by half. Sample centrifugation is a promising method, ensuring that the tensile force actually acts on the entire sample to determine the water retention curve of the substrate also reducing the duration of the analyses.application/pdfengScientia Agricola. Piracicaba. Vol. 79, n. 5 (2022), e20210078, 10 p.Substrato de culturaCentrifugaçãoTurfaSphagnum peatSubstrate analysisAnalysis methodsExpanded clayWater retention curveMethod for the physical characterization of substrates using centrifugationinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001164251.pdf.txt001164251.pdf.txtExtracted Texttext/plain45835http://www.lume.ufrgs.br/bitstream/10183/256399/2/001164251.pdf.txt083c0a637620facb031dd2aa18cf2e17MD52ORIGINAL001164251.pdfTexto completo (inglês)application/pdf1268807http://www.lume.ufrgs.br/bitstream/10183/256399/1/001164251.pdf932d1fd2f6aaa5d23920e481782b1d80MD5110183/2563992023-03-30 03:23:36.884848oai:www.lume.ufrgs.br:10183/256399Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-03-30T06:23:36Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Method for the physical characterization of substrates using centrifugation |
title |
Method for the physical characterization of substrates using centrifugation |
spellingShingle |
Method for the physical characterization of substrates using centrifugation Avrella, Eduarda Demari Substrato de cultura Centrifugação Turfa Sphagnum peat Substrate analysis Analysis methods Expanded clay Water retention curve |
title_short |
Method for the physical characterization of substrates using centrifugation |
title_full |
Method for the physical characterization of substrates using centrifugation |
title_fullStr |
Method for the physical characterization of substrates using centrifugation |
title_full_unstemmed |
Method for the physical characterization of substrates using centrifugation |
title_sort |
Method for the physical characterization of substrates using centrifugation |
author |
Avrella, Eduarda Demari |
author_facet |
Avrella, Eduarda Demari Paim, Luciana Pinto Emer, Aquélis Armiliato Vence, Lilia Beatriz Fior, Claudimar Sidnei |
author_role |
author |
author2 |
Paim, Luciana Pinto Emer, Aquélis Armiliato Vence, Lilia Beatriz Fior, Claudimar Sidnei |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Avrella, Eduarda Demari Paim, Luciana Pinto Emer, Aquélis Armiliato Vence, Lilia Beatriz Fior, Claudimar Sidnei |
dc.subject.por.fl_str_mv |
Substrato de cultura Centrifugação Turfa |
topic |
Substrato de cultura Centrifugação Turfa Sphagnum peat Substrate analysis Analysis methods Expanded clay Water retention curve |
dc.subject.eng.fl_str_mv |
Sphagnum peat Substrate analysis Analysis methods Expanded clay Water retention curve |
description |
The characterization of substrate properties supports the correct choice of components and directs management decisions in container cultivation. There are several systems of analysis, however, the routine procedures to determine the water retention curve (WRC) are time consuming and inaccurate. This study proposed a reproducible, less time- consuming, and easy to perform method for physical characterization of substrates. We used Sphagnum peat, coconut powder, carbonized rice husk, expanded vermiculite, and expanded clay in isolation. The WRC was obtained at tensions 0, 10, 50, and 100 hPa using the method of Büchner funnel, the European standard (CEN-EN13041), and by the centrifugation method of samples. In centrifugation, tensions were simulated by combining the angular velocity, sample height, and radius measured from the sample outermost point to the central point of the centrifuge. Three rotations were applied (230; 520 and 730 rpm), testing the centrifugation time for each tension and then the volumetric water content was compared between the methods. The results showed a positive correlation (p < 0.001) between the centrifugation and standard methods, considering that the centrifugation time required for moisture stabilization varied according to the material analyzed and the tension applied. However, the time required to obtain a report was reduced by half. Sample centrifugation is a promising method, ensuring that the tensile force actually acts on the entire sample to determine the water retention curve of the substrate also reducing the duration of the analyses. |
publishDate |
2022 |
dc.date.issued.fl_str_mv |
2022 |
dc.date.accessioned.fl_str_mv |
2023-03-29T03:25:00Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/256399 |
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0103-9016 |
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001164251 |
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0103-9016 001164251 |
url |
http://hdl.handle.net/10183/256399 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Scientia Agricola. Piracicaba. Vol. 79, n. 5 (2022), e20210078, 10 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Repositório Institucional da UFRGS |
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