Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time.
Main Author: | |
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Publication Date: | 2012 |
Other Authors: | , |
Format: | Article |
Language: | eng |
Source: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Download full: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/953592 |
Summary: | The objective of this work was to evaluate the effect of cover crops and their desiccation times on upland rice yield and on the levels of nitrate and ammonium in a no.tillage soil. The experiment was carried out in a randomized blocks, with split plots and three replicates. Cover crops (plots) were sowed in the off season (March 2009). In November 2009, at 30, 20, 10 and 0 days before rice sowing (split plots), herbicide was applied on the cover crops (fallow, Panicum maximum, Urochloa ruziziensis, U. brizantha and millet). Straw and soil were sampled (0.10 cm) at the sowing day, and after 7, 14, 21, 28 and 35 days. Straws from millet and fallow were degraded more rapidly and provided the lowest level of nitrate in the soil. Urochloa ruziziensis, U. brizantha and P. maximum produced higher amounts of dry matter, and provided the highest levels of nitrate in the soil. Millet provides the lowest nitrate/ammonium ratio and the highest upland rice yield. Desiccations carried out at 30 and 20 days before sowing had the largest levels of nitrate in the soil at the sowing date. Nitrogen content and forms in the soil are affected by cover crops and their desiccation times. |
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Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time.ArrozOryza sativaPanicum maximumMilhetoPlanta de coberturaDesidrataçãoNitratoAmôniaUrochloa ruziziensisUrochloa brizanthaThe objective of this work was to evaluate the effect of cover crops and their desiccation times on upland rice yield and on the levels of nitrate and ammonium in a no.tillage soil. The experiment was carried out in a randomized blocks, with split plots and three replicates. Cover crops (plots) were sowed in the off season (March 2009). In November 2009, at 30, 20, 10 and 0 days before rice sowing (split plots), herbicide was applied on the cover crops (fallow, Panicum maximum, Urochloa ruziziensis, U. brizantha and millet). Straw and soil were sampled (0.10 cm) at the sowing day, and after 7, 14, 21, 28 and 35 days. Straws from millet and fallow were degraded more rapidly and provided the lowest level of nitrate in the soil. Urochloa ruziziensis, U. brizantha and P. maximum produced higher amounts of dry matter, and provided the highest levels of nitrate in the soil. Millet provides the lowest nitrate/ammonium ratio and the highest upland rice yield. Desiccations carried out at 30 and 20 days before sowing had the largest levels of nitrate in the soil at the sowing date. Nitrogen content and forms in the soil are affected by cover crops and their desiccation times.ADRIANO STEPHAN NASCENTE, CNPAF; CARLOS ALEXANDRE COSTA CRUSCIOL., UNESP, Botucatu-SP; TARCISIO COBUCCI, CNPAF.NASCENTE, A. S.CRUSCIOL, C. A. C.COBUCCI, T.2013-03-20T11:11:11Z2013-03-20T11:11:11Z2013-03-2020122013-03-20T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePesquisa Agropecuária Brasileira, v. 47, n. 12, p. 1699-1706, dez. 2012.http://www.alice.cnptia.embrapa.br/alice/handle/doc/953592enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-15T23:32:22Zoai:www.alice.cnptia.embrapa.br:doc/953592Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-15T23:32:22falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-15T23:32:22Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. |
title |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. |
spellingShingle |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. NASCENTE, A. S. Arroz Oryza sativa Panicum maximum Milheto Planta de cobertura Desidratação Nitrato Amônia Urochloa ruziziensis Urochloa brizantha |
title_short |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. |
title_full |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. |
title_fullStr |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. |
title_full_unstemmed |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. |
title_sort |
Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time. |
author |
NASCENTE, A. S. |
author_facet |
NASCENTE, A. S. CRUSCIOL, C. A. C. COBUCCI, T. |
author_role |
author |
author2 |
CRUSCIOL, C. A. C. COBUCCI, T. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
ADRIANO STEPHAN NASCENTE, CNPAF; CARLOS ALEXANDRE COSTA CRUSCIOL., UNESP, Botucatu-SP; TARCISIO COBUCCI, CNPAF. |
dc.contributor.author.fl_str_mv |
NASCENTE, A. S. CRUSCIOL, C. A. C. COBUCCI, T. |
dc.subject.por.fl_str_mv |
Arroz Oryza sativa Panicum maximum Milheto Planta de cobertura Desidratação Nitrato Amônia Urochloa ruziziensis Urochloa brizantha |
topic |
Arroz Oryza sativa Panicum maximum Milheto Planta de cobertura Desidratação Nitrato Amônia Urochloa ruziziensis Urochloa brizantha |
description |
The objective of this work was to evaluate the effect of cover crops and their desiccation times on upland rice yield and on the levels of nitrate and ammonium in a no.tillage soil. The experiment was carried out in a randomized blocks, with split plots and three replicates. Cover crops (plots) were sowed in the off season (March 2009). In November 2009, at 30, 20, 10 and 0 days before rice sowing (split plots), herbicide was applied on the cover crops (fallow, Panicum maximum, Urochloa ruziziensis, U. brizantha and millet). Straw and soil were sampled (0.10 cm) at the sowing day, and after 7, 14, 21, 28 and 35 days. Straws from millet and fallow were degraded more rapidly and provided the lowest level of nitrate in the soil. Urochloa ruziziensis, U. brizantha and P. maximum produced higher amounts of dry matter, and provided the highest levels of nitrate in the soil. Millet provides the lowest nitrate/ammonium ratio and the highest upland rice yield. Desiccations carried out at 30 and 20 days before sowing had the largest levels of nitrate in the soil at the sowing date. Nitrogen content and forms in the soil are affected by cover crops and their desiccation times. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012 2013-03-20T11:11:11Z 2013-03-20T11:11:11Z 2013-03-20 2013-03-20T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Pesquisa Agropecuária Brasileira, v. 47, n. 12, p. 1699-1706, dez. 2012. http://www.alice.cnptia.embrapa.br/alice/handle/doc/953592 |
identifier_str_mv |
Pesquisa Agropecuária Brasileira, v. 47, n. 12, p. 1699-1706, dez. 2012. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/953592 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503376815259648 |