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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
03/08/2015 |
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Data da última atualização: |
07/08/2018 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Autoria: |
RESENDE, G. M. de; COSTA, N. D.; YURI, J. E. |
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Afiliação: |
GERALDO MILANEZ DE RESENDE, CPATSA; NIVALDO DUARTE COSTA, CPATSA; JONY EISHI YURI, CPATSA. |
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Título: |
Cultivo da cebola: cultivares e ajustes na recomendação de adubação NPK para o Submédio do Vale do São Francisco . |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Petrolina: Embrapa Semiárido, 2015. |
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Páginas: |
Np. |
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Descrição Física: |
il. |
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Série: |
(Embrapa Semiárido. Instruções Técnicas, 121). |
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ISSN: |
1809-0001 |
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Idioma: |
Português |
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Conteúdo: |
Neste trabalho são apresentadas informações acerca da nutrição na cultura da cebola no Submédio do Vale do São Francisco e as principais cultivares de cebola recomendadas para cultivo. As recomendações apresentadas estão embasadas em resultados de estudos realizados na Embrapa Semiárido. |
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Palavras-Chave: |
Cultivar; Recomendação tecnica; Vale do São Francisco. |
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Thesagro: |
Adubação; Cebola; Fósforo; Nitrogênio; Nutrição; Potássio; Sistema de Cultivo; Sistema de Produção. |
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Thesaurus Nal: |
Onions. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/127390/1/Nivaldo-2015.pdf
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Marc: |
LEADER 01214nam a2200313 a 4500
001 2021244
005 2018-08-07
008 2015 bl uuuu u0uu1 u #d
022 $a1809-0001
100 1 $aRESENDE, G. M. de
245 $aCultivo da cebola$bcultivares e ajustes na recomendação de adubação NPK para o Submédio do Vale do São Francisco .$h[electronic resource]
260 $aPetrolina: Embrapa Semiárido$c2015
300 $aNp.$cil.
490 $a(Embrapa Semiárido. Instruções Técnicas, 121).
520 $aNeste trabalho são apresentadas informações acerca da nutrição na cultura da cebola no Submédio do Vale do São Francisco e as principais cultivares de cebola recomendadas para cultivo. As recomendações apresentadas estão embasadas em resultados de estudos realizados na Embrapa Semiárido.
650 $aOnions
650 $aAdubação
650 $aCebola
650 $aFósforo
650 $aNitrogênio
650 $aNutrição
650 $aPotássio
650 $aSistema de Cultivo
650 $aSistema de Produção
653 $aCultivar
653 $aRecomendação tecnica
653 $aVale do São Francisco
700 1 $aCOSTA, N. D.
700 1 $aYURI, J. E.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
02/12/2014 |
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Data da última atualização: |
02/12/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
TEIXEIRA, A. H. de C.; HERNANDEZ, F. B. T.; ANDRADE, R. G.; LEIVAS, J. F.; BOLFE, E. L. |
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Afiliação: |
ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; FERNANDO B. T. HERNANDEZ, UNESP; RICARDO GUIMARAES ANDRADE, CNPM; JANICE FREITAS LEIVAS, CNPM; EDSON LUIS BOLFE, CNPM. |
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Título: |
Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Proceedings of SPIE, v. 9239, p. 92390O-1 - 92390O-10, 2014. |
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ISBN: |
0277-786X |
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DOI: |
10.1117/12.2067090 |
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Idioma: |
Português |
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Notas: |
Presented at the 16th Remote Sensing for Agriculture, Ecosystems, and Hydrology. |
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Conteúdo: |
The energy balance (EB) components were quantified in a commercial farm with corn crop, irrigated by central pivots, in the Northwestern side of São Paulo state, Southeast Brazil. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) was applied to retrieve the latent heat flux (λE), considering six pivots, covering irrigated areas from 74 to 108 ha. With λE quantified and considering soil heat flux (G) as a fraction of net radiation (Rn), the sensible heat flux (H) was acquired as a residual in the energy balance equation. Seven Landsat satellite images, covering all corn crop stages from 23 April 2010 to 29 August 2010, allowed relating the energy balance components according to the accumulated degree-days (DDac) from the planting to harvest dates. The average Rn values ranging from 5.2 to 7.2 MJ m-2 day-1, represented 30 to 45% of global solar radiation (RG). Considering the variation of the energy balance components along the corn crop growing seasons, the average ranges for λE, H and G were respectively 0.0 to 6.4 MJ m-2 day-1, -1.5 to 6.7 MJ m-2 day-1 and 0.1 to 0.6 MJ m-2 day-1. The fraction of the available energy (Rn - G) used as λE was from 0.0 to 1.3 indicated a good irrigation management, insuring that the water deficit could not be the reason of any yield reduction. Although Rn did not reflected well the crop stages, its partition strongly depended on these stages. λE higher than Rn and the negative H/Rn, happened sometimes along the corn growing seasons. This occurred after the vegetative growth and before the harvest times, indicating heat advection from the surrounding areas to the irrigation pivots, which represented an additional energy source for the evaporative process. The models applied here with only the visible and infrared bands of the Landsat sensor are very useful for the energy balance analyses, considering the size of the corn crop irrigation pivots in Southeast Brazil, when subsidizing a rational irrigation water application in corn crop. MenosThe energy balance (EB) components were quantified in a commercial farm with corn crop, irrigated by central pivots, in the Northwestern side of São Paulo state, Southeast Brazil. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) was applied to retrieve the latent heat flux (λE), considering six pivots, covering irrigated areas from 74 to 108 ha. With λE quantified and considering soil heat flux (G) as a fraction of net radiation (Rn), the sensible heat flux (H) was acquired as a residual in the energy balance equation. Seven Landsat satellite images, covering all corn crop stages from 23 April 2010 to 29 August 2010, allowed relating the energy balance components according to the accumulated degree-days (DDac) from the planting to harvest dates. The average Rn values ranging from 5.2 to 7.2 MJ m-2 day-1, represented 30 to 45% of global solar radiation (RG). Considering the variation of the energy balance components along the corn crop growing seasons, the average ranges for λE, H and G were respectively 0.0 to 6.4 MJ m-2 day-1, -1.5 to 6.7 MJ m-2 day-1 and 0.1 to 0.6 MJ m-2 day-1. The fraction of the available energy (Rn - G) used as λE was from 0.0 to 1.3 indicated a good irrigation management, insuring that the water deficit could not be the reason of any yield reduction. Although Rn did not reflected well the crop stages, its partition strongly depended on these stages. λE higher than Rn and the negative H/Rn, happened sometimes alon... Mostrar Tudo |
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Palavras-Chave: |
Latent heat flux; Net radiation; Sensible heat flux; Soil heat flux. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/112782/1/4200.pdf
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Marc: |
LEADER 02880naa a2200253 a 4500
001 2001276
005 2014-12-02
008 2014 bl uuuu u00u1 u #d
022 $a0277-786X
024 7 $a10.1117/12.2067090$2DOI
100 1 $aTEIXEIRA, A. H. de C.
245 $aEnergy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.$h[electronic resource]
260 $c2014
500 $aPresented at the 16th Remote Sensing for Agriculture, Ecosystems, and Hydrology.
520 $aThe energy balance (EB) components were quantified in a commercial farm with corn crop, irrigated by central pivots, in the Northwestern side of São Paulo state, Southeast Brazil. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) was applied to retrieve the latent heat flux (λE), considering six pivots, covering irrigated areas from 74 to 108 ha. With λE quantified and considering soil heat flux (G) as a fraction of net radiation (Rn), the sensible heat flux (H) was acquired as a residual in the energy balance equation. Seven Landsat satellite images, covering all corn crop stages from 23 April 2010 to 29 August 2010, allowed relating the energy balance components according to the accumulated degree-days (DDac) from the planting to harvest dates. The average Rn values ranging from 5.2 to 7.2 MJ m-2 day-1, represented 30 to 45% of global solar radiation (RG). Considering the variation of the energy balance components along the corn crop growing seasons, the average ranges for λE, H and G were respectively 0.0 to 6.4 MJ m-2 day-1, -1.5 to 6.7 MJ m-2 day-1 and 0.1 to 0.6 MJ m-2 day-1. The fraction of the available energy (Rn - G) used as λE was from 0.0 to 1.3 indicated a good irrigation management, insuring that the water deficit could not be the reason of any yield reduction. Although Rn did not reflected well the crop stages, its partition strongly depended on these stages. λE higher than Rn and the negative H/Rn, happened sometimes along the corn growing seasons. This occurred after the vegetative growth and before the harvest times, indicating heat advection from the surrounding areas to the irrigation pivots, which represented an additional energy source for the evaporative process. The models applied here with only the visible and infrared bands of the Landsat sensor are very useful for the energy balance analyses, considering the size of the corn crop irrigation pivots in Southeast Brazil, when subsidizing a rational irrigation water application in corn crop.
653 $aLatent heat flux
653 $aNet radiation
653 $aSensible heat flux
653 $aSoil heat flux
700 1 $aHERNANDEZ, F. B. T.
700 1 $aANDRADE, R. G.
700 1 $aLEIVAS, J. F.
700 1 $aBOLFE, E. L.
773 $tProceedings of SPIE$gv. 9239, p. 92390O-1 - 92390O-10, 2014.
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Embrapa Territorial (CNPM) |
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