Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Scientiarum. Agronomy (Online) |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42703 |
Resumo: | The leaf area index (LAI) is relevant in studies of phenomena at different scales, such as for the leaf to canopy scale and the calculation of the extinction coefficient of photosynthetically active radiation (kPAR), providing input for the parameterization of physiological basis models. The objective of this work was to verify the variation of the LAI and the coffee kPAR subjected to different drip irrigation levels (130, 100, 70, and 40%) and to compare the data obtained from radiation bar linear sensors (SunScan) in the plants that received full irrigation with the values found by other LAI estimation methodologies. The study was conducted in Piracicaba, São Paulo State, Brazil, using the species Coffea arabica cv. Red Catuaí IAC 144; a drip irrigation system was adopted, with the irrigation controlled by tensiometry. The mean LAI values were higher in the L130 (irrigation level of 130%) and L100 (irrigation level of 100%) treatments than those with deficit irrigation depths. The mean kPAR values were lower for the L130 and L100 treatments than the values found in the deficit irrigation depth treatments. When comparing SunScan to other methodologies, the mean error (ME) and absolute mean error (AME) were high. |
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Acta Scientiarum. Agronomy (Online) |
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Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levelsCoffea arabicaIAFSunScandéficit hídrico.The leaf area index (LAI) is relevant in studies of phenomena at different scales, such as for the leaf to canopy scale and the calculation of the extinction coefficient of photosynthetically active radiation (kPAR), providing input for the parameterization of physiological basis models. The objective of this work was to verify the variation of the LAI and the coffee kPAR subjected to different drip irrigation levels (130, 100, 70, and 40%) and to compare the data obtained from radiation bar linear sensors (SunScan) in the plants that received full irrigation with the values found by other LAI estimation methodologies. The study was conducted in Piracicaba, São Paulo State, Brazil, using the species Coffea arabica cv. Red Catuaí IAC 144; a drip irrigation system was adopted, with the irrigation controlled by tensiometry. The mean LAI values were higher in the L130 (irrigation level of 130%) and L100 (irrigation level of 100%) treatments than those with deficit irrigation depths. The mean kPAR values were lower for the L130 and L100 treatments than the values found in the deficit irrigation depth treatments. When comparing SunScan to other methodologies, the mean error (ME) and absolute mean error (AME) were high.Universidade Estadual de Maringá2019-09-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4270310.4025/actasciagron.v41i1.42703Acta Scientiarum. Agronomy; Vol 41 (2019): Publicação Contínua; e42703Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e427031807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMenghttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42703/751375148346Copyright (c) 2019 Acta Scientiarum. Agronomyhttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessCosta, Jéfferson de OliveiraDuarte Coelho, Rubens Barros, Timóteo Herculino da SilvaFraga Júnior, Eusímio FelisbinoFernandes, André Luís Teixeira 2022-02-20T21:47:11Zoai:periodicos.uem.br/ojs:article/42703Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2022-02-20T21:47:11Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels |
title |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels |
spellingShingle |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels Costa, Jéfferson de Oliveira Coffea arabica IAF SunScan déficit hídrico. |
title_short |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels |
title_full |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels |
title_fullStr |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels |
title_full_unstemmed |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels |
title_sort |
Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels |
author |
Costa, Jéfferson de Oliveira |
author_facet |
Costa, Jéfferson de Oliveira Duarte Coelho, Rubens Barros, Timóteo Herculino da Silva Fraga Júnior, Eusímio Felisbino Fernandes, André Luís Teixeira |
author_role |
author |
author2 |
Duarte Coelho, Rubens Barros, Timóteo Herculino da Silva Fraga Júnior, Eusímio Felisbino Fernandes, André Luís Teixeira |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Costa, Jéfferson de Oliveira Duarte Coelho, Rubens Barros, Timóteo Herculino da Silva Fraga Júnior, Eusímio Felisbino Fernandes, André Luís Teixeira |
dc.subject.por.fl_str_mv |
Coffea arabica IAF SunScan déficit hídrico. |
topic |
Coffea arabica IAF SunScan déficit hídrico. |
description |
The leaf area index (LAI) is relevant in studies of phenomena at different scales, such as for the leaf to canopy scale and the calculation of the extinction coefficient of photosynthetically active radiation (kPAR), providing input for the parameterization of physiological basis models. The objective of this work was to verify the variation of the LAI and the coffee kPAR subjected to different drip irrigation levels (130, 100, 70, and 40%) and to compare the data obtained from radiation bar linear sensors (SunScan) in the plants that received full irrigation with the values found by other LAI estimation methodologies. The study was conducted in Piracicaba, São Paulo State, Brazil, using the species Coffea arabica cv. Red Catuaí IAC 144; a drip irrigation system was adopted, with the irrigation controlled by tensiometry. The mean LAI values were higher in the L130 (irrigation level of 130%) and L100 (irrigation level of 100%) treatments than those with deficit irrigation depths. The mean kPAR values were lower for the L130 and L100 treatments than the values found in the deficit irrigation depth treatments. When comparing SunScan to other methodologies, the mean error (ME) and absolute mean error (AME) were high. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-05 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42703 10.4025/actasciagron.v41i1.42703 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42703 |
identifier_str_mv |
10.4025/actasciagron.v41i1.42703 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42703/751375148346 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Acta Scientiarum. Agronomy https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Acta Scientiarum. Agronomy https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Maringá |
publisher.none.fl_str_mv |
Universidade Estadual de Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Agronomy; Vol 41 (2019): Publicação Contínua; e42703 Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e42703 1807-8621 1679-9275 reponame:Acta Scientiarum. Agronomy (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum. Agronomy (Online) |
collection |
Acta Scientiarum. Agronomy (Online) |
repository.name.fl_str_mv |
Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br |
_version_ |
1799305911216373760 |