Soybean potassic fertilization in a Dark-Red Latosol sandy loam
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/16149 |
Resumo: | During three years, an experiment was carried out in a Dark-Red Latosol (sandy loam) to study the effects of annual applications of 0, 40, 80, 160 and 240 kg/ha of K2O as potassium chloride and potassium sulphate, applied in the seed rows or spread and incorporated. There was a yield increase due to potassium fertilization since the second year. Maximum yields were associated to potassium levels in the leaves above 1.5% In drier than normal years, the spreading applications led to better results than row applications. There were no differences between potassium sources. A decrease in exchangeable potassium levels in the soil was observed; for this reason, the application of doses bigger than 80 kg/ha of K2O a year was considered necessary to maintain the original potassium level. On the other hand, the fertilization with higher potassium doses led to a significant loss of potassium by leaching. |
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Soybean potassic fertilization in a Dark-Red Latosol sandy loamAdubação potássica da soja em Latossolo Vermelho-Escuro fase arenosaGlycine max; potassium; sources; way of application; levels in the soil; leaf contents; leachingGlycine max; potássio; fontes; modo de aplicação; níveis no solo; níveis na planta; lixiviaçãoDuring three years, an experiment was carried out in a Dark-Red Latosol (sandy loam) to study the effects of annual applications of 0, 40, 80, 160 and 240 kg/ha of K2O as potassium chloride and potassium sulphate, applied in the seed rows or spread and incorporated. There was a yield increase due to potassium fertilization since the second year. Maximum yields were associated to potassium levels in the leaves above 1.5% In drier than normal years, the spreading applications led to better results than row applications. There were no differences between potassium sources. A decrease in exchangeable potassium levels in the soil was observed; for this reason, the application of doses bigger than 80 kg/ha of K2O a year was considered necessary to maintain the original potassium level. On the other hand, the fertilization with higher potassium doses led to a significant loss of potassium by leaching.Durante três anos foi conduzido um experimento em Latossolo Vermelho-Escuro fase arenosa, no qual foram estudados os efeitos de adubações anuais com 0,40, 80, 160 e 240 kg/ha de K2O, nas formas de cloreto de potássio e sulfato de potássio, aplicados no sulco de semeadura ou em área total com incorporação. Observou-se resposta à adubação potássica a partir do segundo ano de cultivo. As máximas produções sempre estiveram associadas a teores de potássio nas folhas acima de 1,5%. Em anos mais secos que o normal, as aplicações a lanço proporcionaram melhores resultados do que as aplicações em sulcos. Não foram observadas diferenças entre as fontes de potássio utilizadas. Notou-se acentuado decréscimo nos teores de potássio trocável do solo, com o transcorrer do tempo, sendo necessária a aplicação de doses maiores que 80 kg/ha de K2O por ano para manter o nível original. Por outro lado, a aplicação de doses elevadas de potássio levou a uma perda significativa do nutriente por lixiviação.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraRosolem, Ciro A.Nakagawa, JoãoMachado, José R.2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16149Pesquisa Agropecuaria Brasileira; v.19, n.11, nov. 1984; l319-1326Pesquisa Agropecuária Brasileira; v.19, n.11, nov. 1984; l319-13261678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16149/10317info:eu-repo/semantics/openAccess2014-04-16T19:12:37Zoai:ojs.seer.sct.embrapa.br:article/16149Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T19:12:37Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam Adubação potássica da soja em Latossolo Vermelho-Escuro fase arenosa |
title |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam |
spellingShingle |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam Rosolem, Ciro A. Glycine max; potassium; sources; way of application; levels in the soil; leaf contents; leaching Glycine max; potássio; fontes; modo de aplicação; níveis no solo; níveis na planta; lixiviação |
title_short |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam |
title_full |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam |
title_fullStr |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam |
title_full_unstemmed |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam |
title_sort |
Soybean potassic fertilization in a Dark-Red Latosol sandy loam |
author |
Rosolem, Ciro A. |
author_facet |
Rosolem, Ciro A. Nakagawa, João Machado, José R. |
author_role |
author |
author2 |
Nakagawa, João Machado, José R. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Rosolem, Ciro A. Nakagawa, João Machado, José R. |
dc.subject.por.fl_str_mv |
Glycine max; potassium; sources; way of application; levels in the soil; leaf contents; leaching Glycine max; potássio; fontes; modo de aplicação; níveis no solo; níveis na planta; lixiviação |
topic |
Glycine max; potassium; sources; way of application; levels in the soil; leaf contents; leaching Glycine max; potássio; fontes; modo de aplicação; níveis no solo; níveis na planta; lixiviação |
description |
During three years, an experiment was carried out in a Dark-Red Latosol (sandy loam) to study the effects of annual applications of 0, 40, 80, 160 and 240 kg/ha of K2O as potassium chloride and potassium sulphate, applied in the seed rows or spread and incorporated. There was a yield increase due to potassium fertilization since the second year. Maximum yields were associated to potassium levels in the leaves above 1.5% In drier than normal years, the spreading applications led to better results than row applications. There were no differences between potassium sources. A decrease in exchangeable potassium levels in the soil was observed; for this reason, the application of doses bigger than 80 kg/ha of K2O a year was considered necessary to maintain the original potassium level. On the other hand, the fertilization with higher potassium doses led to a significant loss of potassium by leaching. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-16 |
dc.type.none.fl_str_mv |
|
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://seer.sct.embrapa.br/index.php/pab/article/view/16149 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16149 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/16149/10317 |
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 |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.19, n.11, nov. 1984; l319-1326 Pesquisa Agropecuária Brasileira; v.19, n.11, nov. 1984; l319-1326 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416665605603328 |