Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/30405 |
Resumo: | The objective of this study is to identify qualitative and productive changes in Mombasa grass under a livestock-forest system or full sun and to classify the variables that are most relevant for evaluating the qualitative performance of these systems. The experiments were conducted in shade areas, with four replications for each of the 12 treatments, including four growth cycles and three levels of shading in Mombasa grass, totaling 48 experimental units. Calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P), nitrogen (N) and dry mass production (DMP) (kg ha-1) were used as discriminatory variables for the shading groups. The levels of nutrients and shading in Mombaça grass were classified using Fisher multivariate discriminant analysis (FMDA). The FDMA indicated that Mg, K, P, N, and DMP formed a discriminant function. However, DMP was the least important variable for identifying the groups. Five groups were pre-defined before FDMA: MFS 2 (Mombasa grass in full sun in the second cycle), MFS 6 (Mombasa grass in full sun in the sixth cycle), MFS 7 (Mombasa grass in full sun in the seventh cycle), M25 4 (Mombasa grass at 25% shading in the fourth cycle), and M25 7 (Mombasa grass at 25% shading in the seventh cycle). The results indicate that Mg, P, K, and N are helpful for identifying new genotypes of plants grown on shading conditions because of the responsiveness and stability of these elements to environmental changes. |
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Semina. Ciências Agrárias (Online) |
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Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sunComportamento e classificação dos padrões qualitativos e produtivos do capim mombaça em sistema sivipastoril e pleno solCyclesMacronutrientsMultivariatePanicum maximum.CiclosMacronutrientesMultivariadaPanicum maximum.The objective of this study is to identify qualitative and productive changes in Mombasa grass under a livestock-forest system or full sun and to classify the variables that are most relevant for evaluating the qualitative performance of these systems. The experiments were conducted in shade areas, with four replications for each of the 12 treatments, including four growth cycles and three levels of shading in Mombasa grass, totaling 48 experimental units. Calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P), nitrogen (N) and dry mass production (DMP) (kg ha-1) were used as discriminatory variables for the shading groups. The levels of nutrients and shading in Mombaça grass were classified using Fisher multivariate discriminant analysis (FMDA). The FDMA indicated that Mg, K, P, N, and DMP formed a discriminant function. However, DMP was the least important variable for identifying the groups. Five groups were pre-defined before FDMA: MFS 2 (Mombasa grass in full sun in the second cycle), MFS 6 (Mombasa grass in full sun in the sixth cycle), MFS 7 (Mombasa grass in full sun in the seventh cycle), M25 4 (Mombasa grass at 25% shading in the fourth cycle), and M25 7 (Mombasa grass at 25% shading in the seventh cycle). The results indicate that Mg, P, K, and N are helpful for identifying new genotypes of plants grown on shading conditions because of the responsiveness and stability of these elements to environmental changes.Objetivou com este estudo identificar as alterações qualitativas e produtivas do capim Mombaça em sistema silvipastoril e pleno sol, e classificar as variáveis mais estratégicas para avaliação do seu desempenho qualitativo. O ensaio foi alocado em faixas de sombreamento, com quatro repetições para cada um dos 12 tratamentos - quatro ciclos e três porcentagens de sombreamento, em capim Mombaça, totalizando 48 unidades experimentais. Foram usados os macroelementos: cálcio (Ca), magnésio (Mg), potássio (K), fósforo (P) e nitrogênio (N) e Produção de massa seca (PMS) (kg ha-1) como variáveis de discriminação de grupos de sombreamento. A classificação das variáveis e dos níveis de sombreamento enriquecido com mombaça, procedeu-se por meio da Análise Multivariada Discriminante de Fisher (ADF). Foi possível com o auxílio da ADF identificar as variáveis Mg, K, P, N e PMS como significativas para formação da função discriminante. Entretanto, o teor de PMS foi o menos relevante para identificação dos grupos. Cinco grupos foram pré-definidos antes da análise discriminante, MSP 2º (Mombaça pleno sol 2º ciclo), MSP 6º(Mombaça pleno sol 6º ciclo), MSP 7º (Mombaça pleno sol 7º ciclo), M25 4º (Mombaça 25% 4º ciclo) e M25 7º (Mombaça 25% 7º ciclo). Para auxiliar na busca de novos genótipos considerando a concentração de nutrientes em estudos sobre condições de sombreamento, os elementos Mg, P, K e N oferecem grande auxílio pela sua responsividade e estabilidade as oscilações ambientais.UEL2018-08-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3040510.5433/1679-0359.2018v39n4p1447Semina: Ciências Agrárias; Vol. 39 No. 4 (2018); 1447-1458Semina: Ciências Agrárias; v. 39 n. 4 (2018); 1447-14581679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/30405/24034Copyright (c) 2018 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessOliveira, Leonardo Bernardes Taverny deSantos, Antonio Clementino dosOliveira, Hugo Mariano Rodrigues deAndré, Tiago BarbalhoNeves Neto, Durval Nolasco dasSilveira Júnior, Otacílio2022-10-20T19:36:16Zoai:ojs.pkp.sfu.ca:article/30405Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-20T19:36:16Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun Comportamento e classificação dos padrões qualitativos e produtivos do capim mombaça em sistema sivipastoril e pleno sol |
title |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun |
spellingShingle |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun Oliveira, Leonardo Bernardes Taverny de Cycles Macronutrients Multivariate Panicum maximum. Ciclos Macronutrientes Multivariada Panicum maximum. |
title_short |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun |
title_full |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun |
title_fullStr |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun |
title_full_unstemmed |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun |
title_sort |
Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun |
author |
Oliveira, Leonardo Bernardes Taverny de |
author_facet |
Oliveira, Leonardo Bernardes Taverny de Santos, Antonio Clementino dos Oliveira, Hugo Mariano Rodrigues de André, Tiago Barbalho Neves Neto, Durval Nolasco das Silveira Júnior, Otacílio |
author_role |
author |
author2 |
Santos, Antonio Clementino dos Oliveira, Hugo Mariano Rodrigues de André, Tiago Barbalho Neves Neto, Durval Nolasco das Silveira Júnior, Otacílio |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Oliveira, Leonardo Bernardes Taverny de Santos, Antonio Clementino dos Oliveira, Hugo Mariano Rodrigues de André, Tiago Barbalho Neves Neto, Durval Nolasco das Silveira Júnior, Otacílio |
dc.subject.por.fl_str_mv |
Cycles Macronutrients Multivariate Panicum maximum. Ciclos Macronutrientes Multivariada Panicum maximum. |
topic |
Cycles Macronutrients Multivariate Panicum maximum. Ciclos Macronutrientes Multivariada Panicum maximum. |
description |
The objective of this study is to identify qualitative and productive changes in Mombasa grass under a livestock-forest system or full sun and to classify the variables that are most relevant for evaluating the qualitative performance of these systems. The experiments were conducted in shade areas, with four replications for each of the 12 treatments, including four growth cycles and three levels of shading in Mombasa grass, totaling 48 experimental units. Calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P), nitrogen (N) and dry mass production (DMP) (kg ha-1) were used as discriminatory variables for the shading groups. The levels of nutrients and shading in Mombaça grass were classified using Fisher multivariate discriminant analysis (FMDA). The FDMA indicated that Mg, K, P, N, and DMP formed a discriminant function. However, DMP was the least important variable for identifying the groups. Five groups were pre-defined before FDMA: MFS 2 (Mombasa grass in full sun in the second cycle), MFS 6 (Mombasa grass in full sun in the sixth cycle), MFS 7 (Mombasa grass in full sun in the seventh cycle), M25 4 (Mombasa grass at 25% shading in the fourth cycle), and M25 7 (Mombasa grass at 25% shading in the seventh cycle). The results indicate that Mg, P, K, and N are helpful for identifying new genotypes of plants grown on shading conditions because of the responsiveness and stability of these elements to environmental changes. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-08-02 |
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://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/30405 10.5433/1679-0359.2018v39n4p1447 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/30405 |
identifier_str_mv |
10.5433/1679-0359.2018v39n4p1447 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/30405/24034 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2018 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2018 Semina: Ciências Agrárias http://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 |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 39 No. 4 (2018); 1447-1458 Semina: Ciências Agrárias; v. 39 n. 4 (2018); 1447-1458 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306078371971072 |