Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition

Detalhes bibliográficos
Autor(a) principal: Pereira, Newton N.C.
Data de Publicação: 2014
Outros Autores: Fernandes, Manlio S., Almeida, Dejair L. de
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/15861
Resumo: A field experiment was carried out to study the effects of N-sources (urea, nitrocalcium, ammonium sulphate, chicken dung and biodigestor efluent) with (CNS) and without (SNS) a nitrification inhibitor (Nitrapyrin) on the dry weight and N-uptake of lettuce (Lactuca sativa, L.). The nitrification inhibitor per se had no negative effect on growth of lettuce. However, nitrification inhibitor + urea resulted in a sharp decrease in plant growth rates. The application of nitrocalcium and chicken dung + NS also resulted in decreases of lettuce dry weight. The highest rate of dry weight accumulation was induced by chicken dung - SNS. On the other hand, biodigestor effluent was shown to be a very poor source of N. The chicken dung treatment resulted in NO3- accumulation in lettuce at levels potencially harzardous to human health. It is proved that under the present cropping system, an excess of N is used by lettuce growers in Rio de Janeiro.
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spelling Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibitionAdubação nitrogenada na cultura da alface: fontes de N e inibidor da nitrificaçãonitrate; nitrogennitrato; nitrogênioA field experiment was carried out to study the effects of N-sources (urea, nitrocalcium, ammonium sulphate, chicken dung and biodigestor efluent) with (CNS) and without (SNS) a nitrification inhibitor (Nitrapyrin) on the dry weight and N-uptake of lettuce (Lactuca sativa, L.). The nitrification inhibitor per se had no negative effect on growth of lettuce. However, nitrification inhibitor + urea resulted in a sharp decrease in plant growth rates. The application of nitrocalcium and chicken dung + NS also resulted in decreases of lettuce dry weight. The highest rate of dry weight accumulation was induced by chicken dung - SNS. On the other hand, biodigestor effluent was shown to be a very poor source of N. The chicken dung treatment resulted in NO3- accumulation in lettuce at levels potencially harzardous to human health. It is proved that under the present cropping system, an excess of N is used by lettuce growers in Rio de Janeiro.Foram estudados, em condições de campo, os efeitos de diferentes fontes de N (ureia, nitrocálcio, sulfato de amônio, esterco de galinha e efluente de biodigestor), com (CNS) e sem (SNS) inibidor de nitrificação (nitrapirim), sobre a absorção de nitrogênio por alface (Lactuca sativa L.). O inibidor de nitrificação per se não mostrou efeito negativo sobre o crescimento das plantas. Entretanto, quando aplicado junto com a uréia, o inibidor reduziu significativamente o peso seco da alface; ocorreram também reduções significativas de peso quando o inibidor foi aplicado junto com esterco de galinha e nitrocálcio. O maior acúmulo de peso seco foi observado no tratamento esterco de galinha-SNS. O efluente de biodigestor mostrou ser uma fonte inadequada de N para as plantas. No tratamento esterco de galinha-SNS - foram observados acúmulos de N-NO3 (superiores ao tratamento Nitrocálcio-SNS), a níveis potencialmente tóxicos para nutrição humana. Constata-se que, no manejo atual, um excesso de N está sendo aplicado na cultura da alface no estado do Rio de Janeiro.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPereira, Newton N.C.Fernandes, Manlio S.Almeida, Dejair L. de2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15861Pesquisa Agropecuaria Brasileira; v.24, n.6, jun. 1989; 647-654Pesquisa Agropecuária Brasileira; v.24, n.6, jun. 1989; 647-6541678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/15861/9941info:eu-repo/semantics/openAccess2014-08-26T19:53:45Zoai:ojs.seer.sct.embrapa.br:article/15861Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-26T19:53:45Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
Adubação nitrogenada na cultura da alface: fontes de N e inibidor da nitrificação
title Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
spellingShingle Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
Pereira, Newton N.C.
nitrate; nitrogen
nitrato; nitrogênio
title_short Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
title_full Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
title_fullStr Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
title_full_unstemmed Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
title_sort Nitrogen nutrition for lettuce effects of N-carriers and nitrification inhibition
author Pereira, Newton N.C.
author_facet Pereira, Newton N.C.
Fernandes, Manlio S.
Almeida, Dejair L. de
author_role author
author2 Fernandes, Manlio S.
Almeida, Dejair L. de
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Pereira, Newton N.C.
Fernandes, Manlio S.
Almeida, Dejair L. de
dc.subject.por.fl_str_mv nitrate; nitrogen
nitrato; nitrogênio
topic nitrate; nitrogen
nitrato; nitrogênio
description A field experiment was carried out to study the effects of N-sources (urea, nitrocalcium, ammonium sulphate, chicken dung and biodigestor efluent) with (CNS) and without (SNS) a nitrification inhibitor (Nitrapyrin) on the dry weight and N-uptake of lettuce (Lactuca sativa, L.). The nitrification inhibitor per se had no negative effect on growth of lettuce. However, nitrification inhibitor + urea resulted in a sharp decrease in plant growth rates. The application of nitrocalcium and chicken dung + NS also resulted in decreases of lettuce dry weight. The highest rate of dry weight accumulation was induced by chicken dung - SNS. On the other hand, biodigestor effluent was shown to be a very poor source of N. The chicken dung treatment resulted in NO3- accumulation in lettuce at levels potencially harzardous to human health. It is proved that under the present cropping system, an excess of N is used by lettuce growers in Rio de Janeiro.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
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/15861
url https://seer.sct.embrapa.br/index.php/pab/article/view/15861
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/15861/9941
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.24, n.6, jun. 1989; 647-654
Pesquisa Agropecuária Brasileira; v.24, n.6, jun. 1989; 647-654
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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