Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures

Detalhes bibliográficos
Autor(a) principal: David, Diego Bitencourt
Data de Publicação: 2019
Outros Autores: Conterato, Ionara Fátima, Martins, Jorge Dubal, Amaral, Glaucia Azevedo, Ferreira, Matheus Martins, Azevedo, Eduardo Bohrer
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/110
Resumo: The main feed source for ruminants in southern Brazil comes from pastoral systems and annual ryegrass (Lolium multiflorum Lam.) has been used as one of the main forages for grazing in the winter. Nitrogen (N) is the main nutrient for the maintenance of productivity and persistence of forage grasses, however, it is found in low concentrations in the soil, being necessary to add it in the form of chemical fertilizer. For better use of fertilization, simple and efficient tools are important to determine the nitrogen status of the pasture. The objective of this work was to determine the nitrogen nutrition index (NNI) of ryegrass, to validate a more simplified and efficient methodology for its diagnosis. The treatments were five doses of N (0, 25, 50, 100, 200 kg ha-1) and two forms of nitrogen fertilizer application (single and split). The annual ryegrass plots submitted to fractionated nitrogen fertilization presented NNI below 1 (one) index, suggesting nutrient limitation in the first cut, except at the dose of 200 kg ha-1, where the obtained NNI results were close to one, indicating adequate supply of nitrogen to plants. The results of NNI indicated that doses of 100 kg / ha-1 of N should be applied uniquely in annual ryegrass pasture, for the plant to meet its N needs at the beginning of the cycle. There was a linear relationship between N concentration in the last fully expanded leaf and NNI, indicating a great potential in the use of this method to determine the nitrogen status of the crop.
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spelling Nitrogen nutrition index as a fertilization strategy in annual ryegrass pasturesÍndices de nutrição nitrogenada como estratégia de fertilização em pastagens de azevém anualLolium multiflorum Lam.NupCritical NForage yieldLolium multiflorum Lam.NupN críticoProdução de forragemThe main feed source for ruminants in southern Brazil comes from pastoral systems and annual ryegrass (Lolium multiflorum Lam.) has been used as one of the main forages for grazing in the winter. Nitrogen (N) is the main nutrient for the maintenance of productivity and persistence of forage grasses, however, it is found in low concentrations in the soil, being necessary to add it in the form of chemical fertilizer. For better use of fertilization, simple and efficient tools are important to determine the nitrogen status of the pasture. The objective of this work was to determine the nitrogen nutrition index (NNI) of ryegrass, to validate a more simplified and efficient methodology for its diagnosis. The treatments were five doses of N (0, 25, 50, 100, 200 kg ha-1) and two forms of nitrogen fertilizer application (single and split). The annual ryegrass plots submitted to fractionated nitrogen fertilization presented NNI below 1 (one) index, suggesting nutrient limitation in the first cut, except at the dose of 200 kg ha-1, where the obtained NNI results were close to one, indicating adequate supply of nitrogen to plants. The results of NNI indicated that doses of 100 kg / ha-1 of N should be applied uniquely in annual ryegrass pasture, for the plant to meet its N needs at the beginning of the cycle. There was a linear relationship between N concentration in the last fully expanded leaf and NNI, indicating a great potential in the use of this method to determine the nitrogen status of the crop.A principal fonte de alimentação dos ruminantes no Sul do Brasil é proveniente de sistemas pastoris e o azevém anual (Lolium multiflorum Lam.) tem sido utilizado como uma das principais forrageiras para pastoreio no período hibernal. O nitrogênio (N) é o principal nutriente para a manutenção da produtividade e persistência das gramíneas forrageiras, no entanto, este se encontra em baixas concentrações no solo, sendo necessário adicioná-lo na forma de fertilizante químico. Para melhor uso da fertilização, buscam-se ferramentas simples e eficientes para determinar o status nitrogenado da pastagem. O objetivo do trabalho foi determinar o índice de nutrição nitrogenada (INN) do azevém, para validar uma metodologia mais simplificada e eficiente para seu diagnóstico. Os tratamentos foram cinco doses de N (0, 25, 50, 100, 200 kg ha-1) e duas formas de aplicação do fertilizante nitrogenado (única e parcelada). As parcelas com azevém anual submetidas à adubação nitrogenada fracionada apresentaram INN abaixo de um, sugerindo limitação do nutriente no primeiro corte, exceto na dose de 200 kg ha-1 onde os resultados de INN obtidos foram próximos a um, indicando adequado fornecimento de nitrogênio às plantas. Os resultados de INN indicaram que doses de 100 kg/ha-1 de N devem ser aplicadas de forma única em pastagem de azevém anual, para a planta suprir suas necessidades de N no início do ciclo. Houve relação linear entre a concentração de N na última folha completamente expandida e o INN, indicando grande potencial no uso desse método para determinar o status nitrogenado da cultura.Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural2019-12-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/11010.36812/pag.2019253195-204Pesquisa Agropecuária Gaúcha; Vol 25 No 3 (2019): PESQ. AGROP. GAÚCHA, 100 Anos ; 195-204Pesquisa Agropecuária Gaúcha; v. 25 n. 3 (2019): PESQ. AGROP. GAÚCHA, 100 Anos ; 195-2042595-76860104-9070reponame:Pesquisa Agropecuária Gaúcha (Online)instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulinstacron:SEAPDRporhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/110/86David, Diego Bitencourt Conterato, Ionara Fátima Martins, Jorge Dubal Amaral, Glaucia Azevedo Ferreira, Matheus Martins Azevedo, Eduardo Bohrer info:eu-repo/semantics/openAccess2024-04-22T12:54:35Zoai:ojs.revistapag.agricultura.rs.gov.br:article/110Revistahttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapagPUBhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/oaipag@agricultura.rs.gov.br||2595-76860104-9070opendoar:2024-04-22T12:54:35Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulfalse
dc.title.none.fl_str_mv Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
Índices de nutrição nitrogenada como estratégia de fertilização em pastagens de azevém anual
title Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
spellingShingle Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
David, Diego Bitencourt
Lolium multiflorum Lam.
Nup
Critical N
Forage yield
Lolium multiflorum Lam.
Nup
N crítico
Produção de forragem
title_short Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
title_full Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
title_fullStr Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
title_full_unstemmed Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
title_sort Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
author David, Diego Bitencourt
author_facet David, Diego Bitencourt
Conterato, Ionara Fátima
Martins, Jorge Dubal
Amaral, Glaucia Azevedo
Ferreira, Matheus Martins
Azevedo, Eduardo Bohrer
author_role author
author2 Conterato, Ionara Fátima
Martins, Jorge Dubal
Amaral, Glaucia Azevedo
Ferreira, Matheus Martins
Azevedo, Eduardo Bohrer
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv David, Diego Bitencourt
Conterato, Ionara Fátima
Martins, Jorge Dubal
Amaral, Glaucia Azevedo
Ferreira, Matheus Martins
Azevedo, Eduardo Bohrer
dc.subject.por.fl_str_mv Lolium multiflorum Lam.
Nup
Critical N
Forage yield
Lolium multiflorum Lam.
Nup
N crítico
Produção de forragem
topic Lolium multiflorum Lam.
Nup
Critical N
Forage yield
Lolium multiflorum Lam.
Nup
N crítico
Produção de forragem
description The main feed source for ruminants in southern Brazil comes from pastoral systems and annual ryegrass (Lolium multiflorum Lam.) has been used as one of the main forages for grazing in the winter. Nitrogen (N) is the main nutrient for the maintenance of productivity and persistence of forage grasses, however, it is found in low concentrations in the soil, being necessary to add it in the form of chemical fertilizer. For better use of fertilization, simple and efficient tools are important to determine the nitrogen status of the pasture. The objective of this work was to determine the nitrogen nutrition index (NNI) of ryegrass, to validate a more simplified and efficient methodology for its diagnosis. The treatments were five doses of N (0, 25, 50, 100, 200 kg ha-1) and two forms of nitrogen fertilizer application (single and split). The annual ryegrass plots submitted to fractionated nitrogen fertilization presented NNI below 1 (one) index, suggesting nutrient limitation in the first cut, except at the dose of 200 kg ha-1, where the obtained NNI results were close to one, indicating adequate supply of nitrogen to plants. The results of NNI indicated that doses of 100 kg / ha-1 of N should be applied uniquely in annual ryegrass pasture, for the plant to meet its N needs at the beginning of the cycle. There was a linear relationship between N concentration in the last fully expanded leaf and NNI, indicating a great potential in the use of this method to determine the nitrogen status of the crop.
publishDate 2019
dc.date.none.fl_str_mv 2019-12-04
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://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/110
10.36812/pag.2019253195-204
url http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/110
identifier_str_mv 10.36812/pag.2019253195-204
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/110/86
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
dc.source.none.fl_str_mv Pesquisa Agropecuária Gaúcha; Vol 25 No 3 (2019): PESQ. AGROP. GAÚCHA, 100 Anos ; 195-204
Pesquisa Agropecuária Gaúcha; v. 25 n. 3 (2019): PESQ. AGROP. GAÚCHA, 100 Anos ; 195-204
2595-7686
0104-9070
reponame:Pesquisa Agropecuária Gaúcha (Online)
instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron:SEAPDR
instname_str Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron_str SEAPDR
institution SEAPDR
reponame_str Pesquisa Agropecuária Gaúcha (Online)
collection Pesquisa Agropecuária Gaúcha (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
repository.mail.fl_str_mv pag@agricultura.rs.gov.br||
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