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| 1. |  | GONÇALVES, J. de L.; BOMFIM, M. A. D.; FONTELES, N. L. de O.; FERNANDES, A. M. F.; OLIVEIRA, K. da S.; SOUSA, R. T. de. Composição químico-bromatológica da dieta selecionada por ovinos em pastagem de capim - Tanzânia. In: CONGRESSO NORDESTINO DE PRODUÇÃO ANIMAL, 9., 2014, Ilhéus. Produção animal: novas diretrizes; trabalhos apresentados. Ilhéus: SNPA, 2014. 3 f.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
29/03/2011 |
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Data da última atualização: |
09/05/2018 |
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Autoria: |
BERGAMASCHI, H.; DALMAGO, G. A.; BERGONCI, J. I.; KRUGER, C. A. M. B.; HECKLER, B. M. M.; COMIRAM, F. |
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Afiliação: |
Homero Bergamaschi, Universidade Federal do Rio Grande do Sul (UFRGS); GENEI ANTONIO DALMAGO, CNPT; João Ito Bergonci, UFRGS, Departamento de Botânica; Cleusa Adriane Menegassi Bianchi Krüger, Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUI); Bruna Maria Machado Heckler, Empresa de Assistência Técnica e Extensão Rural; Flavia Comiran, Instituto Agronômico do Paraná. |
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Título: |
Intercepted solar radiation by maize crops subjected to different tillage systems and water availability levels. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 12, p. 1331-1341, dez. 2010 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Radiação solar interceptada pela cultura do milho sob diferentes níveis de preparo do solo e disponibilidade hídrica. |
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Conteúdo: |
Abstract - The objective of this work was to evaluate changes in the photosynthetic photon flux density (PPFD) interception efficiency and PPFD extinction coefficient for maize crop subjected to different soil tillage systems and water availability levels. Crops were subjected to no-tillage and conventional tillage systems combined with full irrigation and non-irrigation treatments. Continuous measurements of transmitted PPFD on the soil surface and incoming PPFD over the canopy were taken throughout the crop cycle. Leaf area index and soil water potential were also measured during the whole period. Considering a mean value over the maize cycle, intercepted PPFD was higher in the conventional tillage than in the no-tillage system. During the initial stages of plants, intercepted PPFD in the conventional tillage was double the PPFD interception in the no-tillage treatment. However, those differences were reduced up to the maximum leaf area index, close to tasseling stage. The lowest interception of PPFD occurred in the conventional tillage during the reproductive period, as leaf senescence progressed. Over the entire crop cycle, the interception of PPFD by the non-irrigated plants was about 20% lower than by the irrigated plants. The no-tillage system reduced the extinction coefficient for PPFD, which may have allowed a higher penetration of solar radiation into the canopy. |
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Palavras-Chave: |
Photosynthetic photon flux density; Water deficit. |
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Thesagro: |
Zea Mays. |
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Thesaurus NAL: |
leaf area; no-tillage. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/105584/1/Intercepted-solar.pdf
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Marc: |
LEADER 02301naa a2200253 a 4500
001 1883598
005 2018-05-09
008 2010 bl uuuu u00u1 u #d
100 1 $aBERGAMASCHI, H.
245 $aIntercepted solar radiation by maize crops subjected to different tillage systems and water availability levels.
260 $c2010
500 $aTítulo em português: Radiação solar interceptada pela cultura do milho sob diferentes níveis de preparo do solo e disponibilidade hídrica.
520 $aAbstract - The objective of this work was to evaluate changes in the photosynthetic photon flux density (PPFD) interception efficiency and PPFD extinction coefficient for maize crop subjected to different soil tillage systems and water availability levels. Crops were subjected to no-tillage and conventional tillage systems combined with full irrigation and non-irrigation treatments. Continuous measurements of transmitted PPFD on the soil surface and incoming PPFD over the canopy were taken throughout the crop cycle. Leaf area index and soil water potential were also measured during the whole period. Considering a mean value over the maize cycle, intercepted PPFD was higher in the conventional tillage than in the no-tillage system. During the initial stages of plants, intercepted PPFD in the conventional tillage was double the PPFD interception in the no-tillage treatment. However, those differences were reduced up to the maximum leaf area index, close to tasseling stage. The lowest interception of PPFD occurred in the conventional tillage during the reproductive period, as leaf senescence progressed. Over the entire crop cycle, the interception of PPFD by the non-irrigated plants was about 20% lower than by the irrigated plants. The no-tillage system reduced the extinction coefficient for PPFD, which may have allowed a higher penetration of solar radiation into the canopy.
650 $aleaf area
650 $ano-tillage
650 $aZea Mays
653 $aPhotosynthetic photon flux density
653 $aWater deficit
700 1 $aDALMAGO, G. A.
700 1 $aBERGONCI, J. I.
700 1 $aKRUGER, C. A. M. B.
700 1 $aHECKLER, B. M. M.
700 1 $aCOMIRAM, F.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 45, n. 12, p. 1331-1341, dez. 2010
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Embrapa Unidades Centrais (AI-SEDE) |
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