Water requirement and crop coefficients of sorghum in Apodi Plateau

Detalhes bibliográficos
Autor(a) principal: Lima,João G. A.
Data de Publicação: 2021
Outros Autores: Espínola Sobrinho,José, Medeiros,José F. de, Viana,Paula C., Maniçoba,Rudah M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662021001000684
Resumo: ABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the region, there are few studies on irrigation management in the Apodi plateau. The aim of this study was to determine the evapotranspiration of the crop and the crop coefficient (Kc) for the different stages of sorghum growth in two cycles, and establish the relationship between the Kc and the normalized difference vegetation index (NDVI) obtained by radiometry. Two weighing lysimeters were used to estimate crop evapotranspiration (ETc). Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. Total crop evapotranspiration in the two cycles was 452 and 557 mm. The ETc value was 23% higher in the second cycle compared to the first. The maximum Kc values ​​for the first and second cycles were 1.21 and 1.35, respectively, using the dual Kc methodology. The linear relationship found between the Kc values ​​and the NDVI allows monitoring and estimating the water requirements of the crop.
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spelling Water requirement and crop coefficients of sorghum in Apodi PlateauSorghum bicolorwater consumptionwater resourcesirrigation managementABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the region, there are few studies on irrigation management in the Apodi plateau. The aim of this study was to determine the evapotranspiration of the crop and the crop coefficient (Kc) for the different stages of sorghum growth in two cycles, and establish the relationship between the Kc and the normalized difference vegetation index (NDVI) obtained by radiometry. Two weighing lysimeters were used to estimate crop evapotranspiration (ETc). Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. Total crop evapotranspiration in the two cycles was 452 and 557 mm. The ETc value was 23% higher in the second cycle compared to the first. The maximum Kc values ​​for the first and second cycles were 1.21 and 1.35, respectively, using the dual Kc methodology. The linear relationship found between the Kc values ​​and the NDVI allows monitoring and estimating the water requirements of the crop.Departamento de Engenharia Agrícola - UFCG2021-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662021001000684Revista Brasileira de Engenharia Agrícola e Ambiental v.25 n.10 2021reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/1807-1929/agriambi.v25n10p684-688info:eu-repo/semantics/openAccessLima,João G. A.Espínola Sobrinho,JoséMedeiros,José F. deViana,Paula C.Maniçoba,Rudah M.eng2021-08-02T00:00:00Zoai:scielo:S1415-43662021001000684Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2021-08-02T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Water requirement and crop coefficients of sorghum in Apodi Plateau
title Water requirement and crop coefficients of sorghum in Apodi Plateau
spellingShingle Water requirement and crop coefficients of sorghum in Apodi Plateau
Lima,João G. A.
Sorghum bicolor
water consumption
water resources
irrigation management
title_short Water requirement and crop coefficients of sorghum in Apodi Plateau
title_full Water requirement and crop coefficients of sorghum in Apodi Plateau
title_fullStr Water requirement and crop coefficients of sorghum in Apodi Plateau
title_full_unstemmed Water requirement and crop coefficients of sorghum in Apodi Plateau
title_sort Water requirement and crop coefficients of sorghum in Apodi Plateau
author Lima,João G. A.
author_facet Lima,João G. A.
Espínola Sobrinho,José
Medeiros,José F. de
Viana,Paula C.
Maniçoba,Rudah M.
author_role author
author2 Espínola Sobrinho,José
Medeiros,José F. de
Viana,Paula C.
Maniçoba,Rudah M.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Lima,João G. A.
Espínola Sobrinho,José
Medeiros,José F. de
Viana,Paula C.
Maniçoba,Rudah M.
dc.subject.por.fl_str_mv Sorghum bicolor
water consumption
water resources
irrigation management
topic Sorghum bicolor
water consumption
water resources
irrigation management
description ABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the region, there are few studies on irrigation management in the Apodi plateau. The aim of this study was to determine the evapotranspiration of the crop and the crop coefficient (Kc) for the different stages of sorghum growth in two cycles, and establish the relationship between the Kc and the normalized difference vegetation index (NDVI) obtained by radiometry. Two weighing lysimeters were used to estimate crop evapotranspiration (ETc). Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. Total crop evapotranspiration in the two cycles was 452 and 557 mm. The ETc value was 23% higher in the second cycle compared to the first. The maximum Kc values ​​for the first and second cycles were 1.21 and 1.35, respectively, using the dual Kc methodology. The linear relationship found between the Kc values ​​and the NDVI allows monitoring and estimating the water requirements of the crop.
publishDate 2021
dc.date.none.fl_str_mv 2021-08-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662021001000684
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dc.language.iso.fl_str_mv eng
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dc.relation.none.fl_str_mv 10.1590/1807-1929/agriambi.v25n10p684-688
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dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.25 n.10 2021
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