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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Clima Temperado. |
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Data corrente: |
16/04/2007 |
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Data da última atualização: |
24/04/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, M. P. dos; ZANON, A. J.; CUADRA, S. V.; STEINMETZ, S.; CASTRO, J. R. de; HEINEMANN, A. B. |
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Afiliação: |
MARCOS PAULO DOS SANTOS, UNIVERSIDADE FEDERAL DE GOIÁS; ALENCAR JUNIOR ZANON, IRGA; SANTIAGO VIANNA CUADRA, CPACT; SILVIO STEINMETZ, CPACT; JOAO RODRIGO DE CASTRO, UNIVERSIDADE FEDERAL DE GOIÁS; ALEXANDRE BRYAN HEINEMANN, CNPAF. |
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Título: |
Yield and morphophysiological indices of irrigated rice genotypes in contrasting ecosystems. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Tropical, Goiânia, v. 47, n. 3, p. 253-264, jul./set. 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
Rice phenology and development are events controlled by environmental and genetic factors, and the yield potential of the crop is defined by their interaction. This study aimed at analyzing the performance of irrigated rice genotypes in contrasting ecosystems and their effects on morphophysiological characteristics. Two ecosystems (tropical and subtropical) were analyzed, as well as cultivars recommended for tropical (BRS Catiana and BRS Jaçanã) and subtropical (BRS Pampa, BRS 7 Taim and IRGA 424) regions. The experiments were arranged in a complete randomized block design, with four replicates, being the factors the genotypes, sowing times and sites. The phenological development, biomass dynamics, radiation use efficiency and grain yield were evaluated. The accumulated degree-days demand for flowering decreased faster in the tropical ecosystem than in the subtropical ecosystem for late sowing. The radiation use efficiency values were similar in the subtropical ecosystem and yield was high for all sowing dates. On the other hand, the tropical ecosystem showed a high variation for radiation use efficiency values and yield. The higher accumulation of degree-days and solar radiation during the reproductive and grain-filling phases contributed to increase yield in both ecosystems. |
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Palavras-Chave: |
Ecofisiologia. |
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Thesagro: |
Arroz irrigado; Época de semeadura; Oryza sativa; Radiação solar. |
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Thesaurus Nal: |
Ecophysiology; Ecosystems; Rice; Solar radiation; Sowing date. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163612/1/Silvio-CNPAF-2017-pat-Incluido.pdf
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Marc: |
LEADER 02177naa a2200301 a 4500
001 2075245
005 2018-04-24
008 2017 bl uuuu u00u1 u #d
100 1 $aSANTOS, M. P. dos
245 $aYield and morphophysiological indices of irrigated rice genotypes in contrasting ecosystems.$h[electronic resource]
260 $c2017
520 $aRice phenology and development are events controlled by environmental and genetic factors, and the yield potential of the crop is defined by their interaction. This study aimed at analyzing the performance of irrigated rice genotypes in contrasting ecosystems and their effects on morphophysiological characteristics. Two ecosystems (tropical and subtropical) were analyzed, as well as cultivars recommended for tropical (BRS Catiana and BRS Jaçanã) and subtropical (BRS Pampa, BRS 7 Taim and IRGA 424) regions. The experiments were arranged in a complete randomized block design, with four replicates, being the factors the genotypes, sowing times and sites. The phenological development, biomass dynamics, radiation use efficiency and grain yield were evaluated. The accumulated degree-days demand for flowering decreased faster in the tropical ecosystem than in the subtropical ecosystem for late sowing. The radiation use efficiency values were similar in the subtropical ecosystem and yield was high for all sowing dates. On the other hand, the tropical ecosystem showed a high variation for radiation use efficiency values and yield. The higher accumulation of degree-days and solar radiation during the reproductive and grain-filling phases contributed to increase yield in both ecosystems.
650 $aEcophysiology
650 $aEcosystems
650 $aRice
650 $aSolar radiation
650 $aSowing date
650 $aArroz irrigado
650 $aÉpoca de semeadura
650 $aOryza sativa
650 $aRadiação solar
653 $aEcofisiologia
700 1 $aZANON, A. J.
700 1 $aCUADRA, S. V.
700 1 $aSTEINMETZ, S.
700 1 $aCASTRO, J. R. de
700 1 $aHEINEMANN, A. B.
773 $tPesquisa Agropecuária Tropical, Goiânia$gv. 47, n. 3, p. 253-264, jul./set. 2017.
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Registro original: |
Embrapa Clima Temperado (CPACT) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
11/08/2020 |
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Data da última atualização: |
16/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 4 |
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Autoria: |
SILVA, D. W.; SCATOLINO, M. V.; PEREIRA, T. G. T.; VILELA, A. P.; EUGENIO, T. M. C.; MARTINS, M. A.; MENDES, R. F.; BUFALINO, L.; TONOLI, G. H. D.; MENDES, L. M. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
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Título: |
Influence of thermal treatment of eucalyptus fibers on the physical-mechanical properties of extruded fiber-cement composites. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Materials Today: Proceedings, v. 31, 2020. |
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Páginas: |
S348-S352 |
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ISSN: |
2214-7853 |
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DOI: |
https://doi.org/10.1016/j.matpr.2020.04.764 |
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Idioma: |
Inglês |
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Conteúdo: |
This study proposes to evaluate the effect of the heat treatment in commercial eucalyptus fibers (produced by thermo-mechanical process) on the physical-mechanical properties of extruded fiber-cements composites. The fibers were treated with different temperatures of heat treatment (140, 170, 200 and 230 °C) for 60 min in a “Macro-ATG” oven. The chemical and morphological characteristics of the natural fibers were evaluated before and after the thermal treatment. The cementitious paste was composed by 67.9% cement, 29.1% limestone and 3% eucalyptus fibers. Hydroxypropylmethylcellulose (HPMC) and polyether carboxylic acid (ADVA 175) were added to the cement paste both in 1% (based on the cement mass) to facilitate the extrusion process. The thermal treatments at 200 and 230 °C were efficient in reducing the extractives content. On the other hand, a decrease in length, diameter and lumen size of the fibers has occurred. The decrease in extractives content did not influence the properties of water absorption, modulus of rupture (MOR) and modulus of elasticity (MOE). The increase in lignin content resulted in increase for apparent porosity and decrease of the toughness in reinforced fiber-cement produced with fibers treated at 200 and 230 °C. The application of the thermal treatment for the fibers did not show improvement in fiber-cement in the evaluated conditions. It is recommended to evaluate other properties of the fiber-cement reinforced with the mentioned treated fibers, such as natural and laboratorial weathering. MenosThis study proposes to evaluate the effect of the heat treatment in commercial eucalyptus fibers (produced by thermo-mechanical process) on the physical-mechanical properties of extruded fiber-cements composites. The fibers were treated with different temperatures of heat treatment (140, 170, 200 and 230 °C) for 60 min in a “Macro-ATG” oven. The chemical and morphological characteristics of the natural fibers were evaluated before and after the thermal treatment. The cementitious paste was composed by 67.9% cement, 29.1% limestone and 3% eucalyptus fibers. Hydroxypropylmethylcellulose (HPMC) and polyether carboxylic acid (ADVA 175) were added to the cement paste both in 1% (based on the cement mass) to facilitate the extrusion process. The thermal treatments at 200 and 230 °C were efficient in reducing the extractives content. On the other hand, a decrease in length, diameter and lumen size of the fibers has occurred. The decrease in extractives content did not influence the properties of water absorption, modulus of rupture (MOR) and modulus of elasticity (MOE). The increase in lignin content resulted in increase for apparent porosity and decrease of the toughness in reinforced fiber-cement produced with fibers treated at 200 and 230 °C. The application of the thermal treatment for the fibers did not show improvement in fiber-cement in the evaluated conditions. It is recommended to evaluate other properties of the fiber-cement reinforced with the mentioned treated fibers, s... Mostrar Tudo |
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Palavras-Chave: |
Cementitious composites; Chemical characterization; Extruded process; Morphological characterization. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02534naa a2200313 a 4500
001 2124283
005 2022-08-16
008 2020 bl uuuu u00u1 u #d
022 $a2214-7853
024 7 $ahttps://doi.org/10.1016/j.matpr.2020.04.764$2DOI
100 1 $aSILVA, D. W.
245 $aInfluence of thermal treatment of eucalyptus fibers on the physical-mechanical properties of extruded fiber-cement composites.$h[electronic resource]
260 $c2020
300 $aS348-S352
520 $aThis study proposes to evaluate the effect of the heat treatment in commercial eucalyptus fibers (produced by thermo-mechanical process) on the physical-mechanical properties of extruded fiber-cements composites. The fibers were treated with different temperatures of heat treatment (140, 170, 200 and 230 °C) for 60 min in a “Macro-ATG” oven. The chemical and morphological characteristics of the natural fibers were evaluated before and after the thermal treatment. The cementitious paste was composed by 67.9% cement, 29.1% limestone and 3% eucalyptus fibers. Hydroxypropylmethylcellulose (HPMC) and polyether carboxylic acid (ADVA 175) were added to the cement paste both in 1% (based on the cement mass) to facilitate the extrusion process. The thermal treatments at 200 and 230 °C were efficient in reducing the extractives content. On the other hand, a decrease in length, diameter and lumen size of the fibers has occurred. The decrease in extractives content did not influence the properties of water absorption, modulus of rupture (MOR) and modulus of elasticity (MOE). The increase in lignin content resulted in increase for apparent porosity and decrease of the toughness in reinforced fiber-cement produced with fibers treated at 200 and 230 °C. The application of the thermal treatment for the fibers did not show improvement in fiber-cement in the evaluated conditions. It is recommended to evaluate other properties of the fiber-cement reinforced with the mentioned treated fibers, such as natural and laboratorial weathering.
653 $aCementitious composites
653 $aChemical characterization
653 $aExtruded process
653 $aMorphological characterization
700 1 $aSCATOLINO, M. V.
700 1 $aPEREIRA, T. G. T.
700 1 $aVILELA, A. P.
700 1 $aEUGENIO, T. M. C.
700 1 $aMARTINS, M. A.
700 1 $aMENDES, R. F.
700 1 $aBUFALINO, L.
700 1 $aTONOLI, G. H. D.
700 1 $aMENDES, L. M.
773 $tMaterials Today: Proceedings$gv. 31, 2020.
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