CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION

Detalhes bibliográficos
Autor(a) principal: Silva, Gerlange Soares da
Data de Publicação: 2020
Outros Autores: Pereira, Francisco Adriano de Carvalho, Santana, Rodrigo Almeida, Meneses, Thaís Nascimento, Lopes Sobrinho, Oswaldo Palma, Rosário, Alex Santana do
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Caatinga
DOI: 10.1590/1983-21252020v33n324rc
Texto Completo: https://periodicos.ufersa.edu.br/caatinga/article/view/9105
Resumo: Well-operated and calibrated weighing lysimeters reliably determine the water demand of agricultural crops, and the quality of the data is evaluated through the error analyses attributed to the instrument. The objective of this study was to determine performance parameters of a weighing lysimeter and to evaluate its adequacy for the direct determination of cocoa crop evapotranspiration. The lysimeter with 1.44 m2 surface, supported on four load cells installed in the experimental area of the Graduate Program in Agricultural Engineering of the Universidade Federal do Recôncavo da Bahia, was calibrated at 3:00 a.m., using known masses at intervals of 02 minutes in five cycles of addition and removal. Data were collected using a datalogger coupled to four load cells with an individual capacity of 1000 kg, programmed to perform readings every 01 second, storing the averages of 15 minutes. The lysimeter showed excellent accuracy, with r2 greater than 0.99 in the correlation between the standard masses and the signal of the load cells and standard error of linear regression estimate of 0.03 mm. The combination of repeatability and hysteresis errors with an uncertainty of 0.19% showed that the load cells have accuracy of ±0.07 mm, with resolution of 0.00033 mV, and sensitivity to detect mass changes below 0.1 mm, the system is adequate for direct measurement of cocoa ETc at time intervals of less than one hour.
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spelling CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATIONCALIBRAÇÃO DE UM LISÍMETRO DE PESAGEM PARA MEDIÇÃO DA EVAPOTRANSPIRAÇÃO DE CACAUEIROTheobroma cacao L. Instrumentação agrícola. Demanda hídrica de culturas.Theobroma cacao L. Agricultural instrumentation. Crop water demand.Well-operated and calibrated weighing lysimeters reliably determine the water demand of agricultural crops, and the quality of the data is evaluated through the error analyses attributed to the instrument. The objective of this study was to determine performance parameters of a weighing lysimeter and to evaluate its adequacy for the direct determination of cocoa crop evapotranspiration. The lysimeter with 1.44 m2 surface, supported on four load cells installed in the experimental area of the Graduate Program in Agricultural Engineering of the Universidade Federal do Recôncavo da Bahia, was calibrated at 3:00 a.m., using known masses at intervals of 02 minutes in five cycles of addition and removal. Data were collected using a datalogger coupled to four load cells with an individual capacity of 1000 kg, programmed to perform readings every 01 second, storing the averages of 15 minutes. The lysimeter showed excellent accuracy, with r2 greater than 0.99 in the correlation between the standard masses and the signal of the load cells and standard error of linear regression estimate of 0.03 mm. The combination of repeatability and hysteresis errors with an uncertainty of 0.19% showed that the load cells have accuracy of ±0.07 mm, with resolution of 0.00033 mV, and sensitivity to detect mass changes below 0.1 mm, the system is adequate for direct measurement of cocoa ETc at time intervals of less than one hour.Lisímetros de pesagem bem operados e calibrados determinam com confiabilidade a demanda hídrica de culturas agrícola, sendo a qualidade dos dados, avaliada através das análises de erros atribuídos ao instrumento. Objetivou-se com o presente estudo, determinar parâmetros de desempenho de um lisímetro de pesagem e avaliar a sua adequação à determinação direta da evapotranspiração da cultura do cacaueiro. O lisímetro de 1,44 m2 de superfície, apoiado sobre quatro células de carga instalado na área experimental do Programa de Pós-Graduação em Engenharia Agrícola da Universidade Federal do Recôncavo da Bahia, foi calibrado as 3:00 horas da manhã, utilizando massas conhecidas em intervalos de 02 minutos em cinco ciclos de incrementos e retiradas. Os dados foram coletados utilizando um datalogger acoplado a quatro células de carga com capacidade individual de 1000 kg, programado para efetuar leituras a cada 01 segundo, com armazenamento das médias de 15 minutos.  O lisímetro apresentou excelente precisão com r2 superior a 0,99 de correlação entre as massas padrão e o sinal das células de carga e erro padrão de estimativa da regressão linear de 0,03 mm. A combinação dos erros de repetitividade e histerese com uma incerteza de 0,19% mostrou que as células de carga tem acurácia de ±0,07mm e com resolução de 0,00033 mV e sensibilidade para detectar mudanças de massa inferior 0,1 mm, o sistema é adequado para medição direta da ETc do cacau em intervalos de tempo inferiores a uma hora.Universidade Federal Rural do Semi-Árido2020-07-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufersa.edu.br/caatinga/article/view/910510.1590/1983-21252020v33n324rcREVISTA CAATINGA; Vol. 33 No. 3 (2020); 803-814Revista Caatinga; v. 33 n. 3 (2020); 803-8141983-21250100-316Xreponame:Revista Caatingainstname:Universidade Federal Rural do Semi-Árido (UFERSA)instacron:UFERSAenghttps://periodicos.ufersa.edu.br/caatinga/article/view/9105/10293Copyright (c) 2020 Revista Caatingainfo:eu-repo/semantics/openAccessSilva, Gerlange Soares daPereira, Francisco Adriano de Carvalho Santana, Rodrigo AlmeidaMeneses, Thaís NascimentoLopes Sobrinho, Oswaldo Palma Rosário, Alex Santana do 2023-07-21T17:14:32Zoai:ojs.periodicos.ufersa.edu.br:article/9105Revistahttps://periodicos.ufersa.edu.br/index.php/caatinga/indexPUBhttps://periodicos.ufersa.edu.br/index.php/caatinga/oaipatricio@ufersa.edu.br|| caatinga@ufersa.edu.br1983-21250100-316Xopendoar:2024-04-29T09:46:46.020353Revista Caatinga - Universidade Federal Rural do Semi-Árido (UFERSA)true
dc.title.none.fl_str_mv CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
CALIBRAÇÃO DE UM LISÍMETRO DE PESAGEM PARA MEDIÇÃO DA EVAPOTRANSPIRAÇÃO DE CACAUEIRO
title CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
spellingShingle CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
Silva, Gerlange Soares da
Theobroma cacao L. Instrumentação agrícola. Demanda hídrica de culturas.
Theobroma cacao L. Agricultural instrumentation. Crop water demand.
Silva, Gerlange Soares da
Theobroma cacao L. Instrumentação agrícola. Demanda hídrica de culturas.
Theobroma cacao L. Agricultural instrumentation. Crop water demand.
title_short CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
title_full CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
title_fullStr CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
title_full_unstemmed CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
title_sort CALIBRATION OF A WEIGHING LYSIMETER FOR MEASURING COCOA EVAPOTRANSPIRATION
author Silva, Gerlange Soares da
author_facet Silva, Gerlange Soares da
Silva, Gerlange Soares da
Pereira, Francisco Adriano de Carvalho
Santana, Rodrigo Almeida
Meneses, Thaís Nascimento
Lopes Sobrinho, Oswaldo Palma
Rosário, Alex Santana do
Pereira, Francisco Adriano de Carvalho
Santana, Rodrigo Almeida
Meneses, Thaís Nascimento
Lopes Sobrinho, Oswaldo Palma
Rosário, Alex Santana do
author_role author
author2 Pereira, Francisco Adriano de Carvalho
Santana, Rodrigo Almeida
Meneses, Thaís Nascimento
Lopes Sobrinho, Oswaldo Palma
Rosário, Alex Santana do
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Silva, Gerlange Soares da
Pereira, Francisco Adriano de Carvalho
Santana, Rodrigo Almeida
Meneses, Thaís Nascimento
Lopes Sobrinho, Oswaldo Palma
Rosário, Alex Santana do
dc.subject.por.fl_str_mv Theobroma cacao L. Instrumentação agrícola. Demanda hídrica de culturas.
Theobroma cacao L. Agricultural instrumentation. Crop water demand.
topic Theobroma cacao L. Instrumentação agrícola. Demanda hídrica de culturas.
Theobroma cacao L. Agricultural instrumentation. Crop water demand.
description Well-operated and calibrated weighing lysimeters reliably determine the water demand of agricultural crops, and the quality of the data is evaluated through the error analyses attributed to the instrument. The objective of this study was to determine performance parameters of a weighing lysimeter and to evaluate its adequacy for the direct determination of cocoa crop evapotranspiration. The lysimeter with 1.44 m2 surface, supported on four load cells installed in the experimental area of the Graduate Program in Agricultural Engineering of the Universidade Federal do Recôncavo da Bahia, was calibrated at 3:00 a.m., using known masses at intervals of 02 minutes in five cycles of addition and removal. Data were collected using a datalogger coupled to four load cells with an individual capacity of 1000 kg, programmed to perform readings every 01 second, storing the averages of 15 minutes. The lysimeter showed excellent accuracy, with r2 greater than 0.99 in the correlation between the standard masses and the signal of the load cells and standard error of linear regression estimate of 0.03 mm. The combination of repeatability and hysteresis errors with an uncertainty of 0.19% showed that the load cells have accuracy of ±0.07 mm, with resolution of 0.00033 mV, and sensitivity to detect mass changes below 0.1 mm, the system is adequate for direct measurement of cocoa ETc at time intervals of less than one hour.
publishDate 2020
dc.date.none.fl_str_mv 2020-07-31
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 https://periodicos.ufersa.edu.br/caatinga/article/view/9105
10.1590/1983-21252020v33n324rc
url https://periodicos.ufersa.edu.br/caatinga/article/view/9105
identifier_str_mv 10.1590/1983-21252020v33n324rc
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://periodicos.ufersa.edu.br/caatinga/article/view/9105/10293
dc.rights.driver.fl_str_mv Copyright (c) 2020 Revista Caatinga
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2020 Revista Caatinga
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal Rural do Semi-Árido
publisher.none.fl_str_mv Universidade Federal Rural do Semi-Árido
dc.source.none.fl_str_mv REVISTA CAATINGA; Vol. 33 No. 3 (2020); 803-814
Revista Caatinga; v. 33 n. 3 (2020); 803-814
1983-2125
0100-316X
reponame:Revista Caatinga
instname:Universidade Federal Rural do Semi-Árido (UFERSA)
instacron:UFERSA
instname_str Universidade Federal Rural do Semi-Árido (UFERSA)
instacron_str UFERSA
institution UFERSA
reponame_str Revista Caatinga
collection Revista Caatinga
repository.name.fl_str_mv Revista Caatinga - Universidade Federal Rural do Semi-Árido (UFERSA)
repository.mail.fl_str_mv patricio@ufersa.edu.br|| caatinga@ufersa.edu.br
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dc.identifier.doi.none.fl_str_mv 10.1590/1983-21252020v33n324rc