Nitrogen nutrition index as a fertilization strategy in annual ryegrass pastures
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , |
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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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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1797068771624484864 |