Estimate of the number of experiments and importance of morphoagronomic characters in lettuce

Detalhes bibliográficos
Autor(a) principal: Barros, José Anderson Soares
Data de Publicação: 2022
Outros Autores: Cavalcante, Marcelo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Revista de Ciências Agrárias (Belém. Online)
Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/3508
Resumo: In scientific research, the repetition of the experiment and the selection of variables-response improve the precision of the results and make the conclusions more assertive, allowing generalizations from the joint analysis. However, there are no official rules about how many times experiment should be repeated, as well as which variables best discriminate the evaluated treatments. For this reason, this research aimed to estimate the number of repetitions of experiments and indicate the importance of morphoagronomic characters of lettuce cv. ‘Veneranda’. Data from four experiments were considered, in which four soil covers were evaluated (SoilTain DW® geosynthetic blanket, white and black polypropylene mulching and uncovered soil) in the completely randomized design, with five replications. The number of experiments was estimated by the repeatability coefficient and the importance of the characters, estimated by Singh criteria. In general, the repeatability coefficients were of medium magnitude, in which the number of measurements ranged from 1 to 9 experiments and, for yield, four experiments are enough to accurately indicate the best treatments. The most discriminant variables were the number of leaves (39.47%) and their length (20.79%) and plant height (17.06%); leaf width and root mass variables may be discarded in future studies (0% contribution). The results indicate that the execution of a single experiment, common in lettuce researches, does not allow accurate conclusions, and should be a criterion to be considered in the experimental planning.
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spelling Estimate of the number of experiments and importance of morphoagronomic characters in lettuceEstimate of the number of experiments and importance of morphoagronomic characters in lettuceLactuca sativa L.principal componentsrepeatability coefficientsoil coversModeloLactuca sativa L.componentes principaiscoeficiente de repetibilidadecoberturas do soloModelIn scientific research, the repetition of the experiment and the selection of variables-response improve the precision of the results and make the conclusions more assertive, allowing generalizations from the joint analysis. However, there are no official rules about how many times experiment should be repeated, as well as which variables best discriminate the evaluated treatments. For this reason, this research aimed to estimate the number of repetitions of experiments and indicate the importance of morphoagronomic characters of lettuce cv. ‘Veneranda’. Data from four experiments were considered, in which four soil covers were evaluated (SoilTain DW® geosynthetic blanket, white and black polypropylene mulching and uncovered soil) in the completely randomized design, with five replications. The number of experiments was estimated by the repeatability coefficient and the importance of the characters, estimated by Singh criteria. In general, the repeatability coefficients were of medium magnitude, in which the number of measurements ranged from 1 to 9 experiments and, for yield, four experiments are enough to accurately indicate the best treatments. The most discriminant variables were the number of leaves (39.47%) and their length (20.79%) and plant height (17.06%); leaf width and root mass variables may be discarded in future studies (0% contribution). The results indicate that the execution of a single experiment, common in lettuce researches, does not allow accurate conclusions, and should be a criterion to be considered in the experimental planning.Na pesquisa científica, a repetição do experimento e a seleção das variáveis-resposta melhoram a precisão dos resultados e tornam mais assertiva as conclusões, possibilitando generalizações a partir da análise conjunta. Porém, não há informações quanto ao número de vezes que o experimento deverá ser conduzido, nem quais as variáveis que melhor discriminam os tratamentos avaliados. Por esta razão, nesta pesquisa, objetivou-se estimar o número de repetições de experimentos e indicar a importância de caracteres morfoagronômicos da alface cv. Veneranda. Foram considerados os dados de quatro experimentos, em que foram avaliadas quatro coberturas do solo (manta geossintética SoilTain DW®, mulching de polipropileno branco e preto, e o solo descoberto) no delineamento inteiramente casualizado, com cinco repetições. O número de experimentos foi estimado pelo coeficiente de repetibilidade e a importância dos caracteres, pelo critério de Singh. Em geral, os coeficientes de repetibilidade foram de média magnitude, em que o número de experimentos variou de 1 a 9, sendo que, para a produtividade, quatro experimentos são suficientes para indicar, com acurácia, os melhores tratamentos. As variáveis mais discriminantes foram o número de folhas (39,47%) e seu comprimento (20,79%) e a altura da planta (17,06%); largura foliar e massa da raiz poderão ser descartadas em futuros estudos em cultivos de alface (0% de contribuição). Os resultados indicam que a execução de um único experimento, comum em pesquisas com alface, não permite conclusões acuradas, devendo ser um critério a ser considerado no planejamento experimental.Universidade Federal Rural da Amazônia/UFRA2022-01-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionTextoinfo:eu-repo/semantics/otherapplication/pdfhttps://ajaes.ufra.edu.br/index.php/ajaes/article/view/3508Amazonian Journal of Agricultural Sciences Journal of Agricultural and Environmental Sciences; Vol 65 (2022): RCA AJAESRevista de Ciências Agrárias Amazonian Journal of Agricultural and Environmental Sciences; v. 65 (2022): RCA AJAES2177-87601517-591Xreponame:Revista de Ciências Agrárias (Belém. Online)instname:Universidade Federal Rural da Amazônia (UFRA)instacron:UFRAporhttps://ajaes.ufra.edu.br/index.php/ajaes/article/view/3508/1647Copyright (c) 2022 José Anderson Soares Barros, Marcelo Cavalcantehttps://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessBarros, José Anderson SoaresCavalcante, Marcelo2022-07-05T15:09:29Zoai:ojs.www.periodicos.ufra.edu.br:article/3508Revistahttps://ajaes.ufra.edu.br/index.php/ajaes/PUBhttps://ajaes.ufra.edu.br/index.php/ajaes/oaiallan.lobato@ufra.edu.br || ajaes.suporte@gmail.com2177-87601517-591Xopendoar:2022-07-05T15:09:29Revista de Ciências Agrárias (Belém. Online) - Universidade Federal Rural da Amazônia (UFRA)false
dc.title.none.fl_str_mv Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
title Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
spellingShingle Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
Barros, José Anderson Soares
Lactuca sativa L.
principal components
repeatability coefficient
soil covers
Modelo
Lactuca sativa L.
componentes principais
coeficiente de repetibilidade
coberturas do solo
Model
title_short Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
title_full Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
title_fullStr Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
title_full_unstemmed Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
title_sort Estimate of the number of experiments and importance of morphoagronomic characters in lettuce
author Barros, José Anderson Soares
author_facet Barros, José Anderson Soares
Cavalcante, Marcelo
author_role author
author2 Cavalcante, Marcelo
author2_role author
dc.contributor.author.fl_str_mv Barros, José Anderson Soares
Cavalcante, Marcelo
dc.subject.por.fl_str_mv Lactuca sativa L.
principal components
repeatability coefficient
soil covers
Modelo
Lactuca sativa L.
componentes principais
coeficiente de repetibilidade
coberturas do solo
Model
topic Lactuca sativa L.
principal components
repeatability coefficient
soil covers
Modelo
Lactuca sativa L.
componentes principais
coeficiente de repetibilidade
coberturas do solo
Model
description In scientific research, the repetition of the experiment and the selection of variables-response improve the precision of the results and make the conclusions more assertive, allowing generalizations from the joint analysis. However, there are no official rules about how many times experiment should be repeated, as well as which variables best discriminate the evaluated treatments. For this reason, this research aimed to estimate the number of repetitions of experiments and indicate the importance of morphoagronomic characters of lettuce cv. ‘Veneranda’. Data from four experiments were considered, in which four soil covers were evaluated (SoilTain DW® geosynthetic blanket, white and black polypropylene mulching and uncovered soil) in the completely randomized design, with five replications. The number of experiments was estimated by the repeatability coefficient and the importance of the characters, estimated by Singh criteria. In general, the repeatability coefficients were of medium magnitude, in which the number of measurements ranged from 1 to 9 experiments and, for yield, four experiments are enough to accurately indicate the best treatments. The most discriminant variables were the number of leaves (39.47%) and their length (20.79%) and plant height (17.06%); leaf width and root mass variables may be discarded in future studies (0% contribution). The results indicate that the execution of a single experiment, common in lettuce researches, does not allow accurate conclusions, and should be a criterion to be considered in the experimental planning.
publishDate 2022
dc.date.none.fl_str_mv 2022-01-27
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Texto
info:eu-repo/semantics/other
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://ajaes.ufra.edu.br/index.php/ajaes/article/view/3508
url https://ajaes.ufra.edu.br/index.php/ajaes/article/view/3508
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://ajaes.ufra.edu.br/index.php/ajaes/article/view/3508/1647
dc.rights.driver.fl_str_mv Copyright (c) 2022 José Anderson Soares Barros, Marcelo Cavalcante
https://creativecommons.org/licenses/by-nc/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2022 José Anderson Soares Barros, Marcelo Cavalcante
https://creativecommons.org/licenses/by-nc/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal Rural da Amazônia/UFRA
publisher.none.fl_str_mv Universidade Federal Rural da Amazônia/UFRA
dc.source.none.fl_str_mv Amazonian Journal of Agricultural Sciences Journal of Agricultural and Environmental Sciences; Vol 65 (2022): RCA AJAES
Revista de Ciências Agrárias Amazonian Journal of Agricultural and Environmental Sciences; v. 65 (2022): RCA AJAES
2177-8760
1517-591X
reponame:Revista de Ciências Agrárias (Belém. Online)
instname:Universidade Federal Rural da Amazônia (UFRA)
instacron:UFRA
instname_str Universidade Federal Rural da Amazônia (UFRA)
instacron_str UFRA
institution UFRA
reponame_str Revista de Ciências Agrárias (Belém. Online)
collection Revista de Ciências Agrárias (Belém. Online)
repository.name.fl_str_mv Revista de Ciências Agrárias (Belém. Online) - Universidade Federal Rural da Amazônia (UFRA)
repository.mail.fl_str_mv allan.lobato@ufra.edu.br || ajaes.suporte@gmail.com
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