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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
02/09/2011 |
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Data da última atualização: |
23/09/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOPES, M. N.; LACERDA, C. F. de; CÂNDIDO, M. J. D.; POMPEU, R. C. F. F.; SILVA, R. G. da; LOPES, J. W. B.; FERNANDES, F. R. B.; BEZERRA, F. M. L. |
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Afiliação: |
Marcos Neves Lopes, Universidade Federal do Ceará - UFC, Fortaleza, CE.; Claudivan Feitosa de Lacerda, UFC, Fortaleza, CE.; Magno José Duarte Cândido, UFC. Fortaleza, CE.; ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC; Rodrigo Gregório da Silva, Instituto Federal de Educação, Ciência e Tecnologia - IFCE, Campus Avançado do Tauá, CE.; José Wellington Batista Lopes, UFC, Fortaleza, CE.; Francisco Ronaldo Belém Fernandes, UFC, Fortaleza, CE.; Francisco Marcus Lima Bezerra, UFC, Fortaleza, CE. |
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Título: |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 40, n. 9, p. 1862-1869, 2011. |
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Idioma: |
Português |
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Conteúdo: |
The objective of this study was to evaluate gas exchange in the massai grass during establishment and regrowth cycles in a greenhouse, using five nitrogen (N) fertilization levels. A completely randomized split-plot design of five nitrogen levels (0; 150; 300; 450 and 600 mg N?dm-3 of soil) was employed with the N levels as plots, and the cycles (establishment, regrowth 1 and 2) as subplots, evaluated with five replicates. We evaluated leaf transpiration (E), leaf temperature (TFOL), leaf photosynthesis rate (A), leaf carbon dioxide concentration (Ci), stomatal conductance (gs), photosynthesis/transpiration ratio (A/E), photosynthesis/conductance ratio (A/gs), chlorophyll relative index (CRI), and nitrogen sufficiency index (NSI). Growth cycles influenced all physiological characteristics, except for NSI. N fertilization levels affected TFOL, A, CRI and NSI variables, whereas for gs, E, Ci, A/E and A/gs it did not occur. A increased from 6.38 to 10.33 μmol?m-2. s-1, at levels 0 and 600 mg N?dm-3 of soil, respectively. Gas exchange in the massai grass was favored by nitrogen fertilization, since the cycles amended these characteristics of the grass. |
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Palavras-Chave: |
Ceará; Fortaleza; Variedade Massai. |
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Thesagro: |
Gramínea forrageira; Panicum maximum; Pastagem. |
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Thesaurus Nal: |
Brazil; Chlorophyll; Photosynthesis. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/42074/1/API-Gas-exchang-massai.pdf
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Marc: |
LEADER 02060naa a2200313 a 4500
001 1899510
005 2019-09-23
008 2011 bl uuuu u00u1 u #d
100 1 $aLOPES, M. N.
245 $aGas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth.
260 $c2011
520 $aThe objective of this study was to evaluate gas exchange in the massai grass during establishment and regrowth cycles in a greenhouse, using five nitrogen (N) fertilization levels. A completely randomized split-plot design of five nitrogen levels (0; 150; 300; 450 and 600 mg N?dm-3 of soil) was employed with the N levels as plots, and the cycles (establishment, regrowth 1 and 2) as subplots, evaluated with five replicates. We evaluated leaf transpiration (E), leaf temperature (TFOL), leaf photosynthesis rate (A), leaf carbon dioxide concentration (Ci), stomatal conductance (gs), photosynthesis/transpiration ratio (A/E), photosynthesis/conductance ratio (A/gs), chlorophyll relative index (CRI), and nitrogen sufficiency index (NSI). Growth cycles influenced all physiological characteristics, except for NSI. N fertilization levels affected TFOL, A, CRI and NSI variables, whereas for gs, E, Ci, A/E and A/gs it did not occur. A increased from 6.38 to 10.33 μmol?m-2. s-1, at levels 0 and 600 mg N?dm-3 of soil, respectively. Gas exchange in the massai grass was favored by nitrogen fertilization, since the cycles amended these characteristics of the grass.
650 $aBrazil
650 $aChlorophyll
650 $aPhotosynthesis
650 $aGramínea forrageira
650 $aPanicum maximum
650 $aPastagem
653 $aCeará
653 $aFortaleza
653 $aVariedade Massai
700 1 $aLACERDA, C. F. de
700 1 $aCÂNDIDO, M. J. D.
700 1 $aPOMPEU, R. C. F. F.
700 1 $aSILVA, R. G. da
700 1 $aLOPES, J. W. B.
700 1 $aFERNANDES, F. R. B.
700 1 $aBEZERRA, F. M. L.
773 $tRevista Brasileira de Zootecnia$gv. 40, n. 9, p. 1862-1869, 2011.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
04/01/2018 |
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Data da última atualização: |
30/04/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
KUHN, T. M. de A.; LOECK, A. E.; BOTTON, M. |
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Afiliação: |
Taciana Melissa de Azevedo Kuhn, Programa de Pós-Graduação em Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas (UFPel), 96010-900, Pelotas, RS, Brasil. E-mail: tacianakuhn@hotmail.com. * Corresponding author; Alci Enimar Loeck, Programa de Pós-Graduação em Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas (UFPel), 96010-900, Pelotas, RS, Brasil. E-mail: tacianakuhn@hotmail.com. * Corresponding author; MARCOS BOTTON, CNPUV. |
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Título: |
Thermal requirements and estimated number of generations of Neopamera bilobata (Say) in strawberry-producing regions of Brazil. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Ciência Rural, Santa Maria, v. 48, n. 1, (e20170212), 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
The thermal threshold and thermal requirements of Neopamera bilobata were determined, and the number of generations that this species may produce in the main strawberry-producing regions of Brazil was estimated. In a climate chamber (70±10% RH and 12h photophase) at 16, 19, 22, 25, 28, or 30±1°C, the development of 120 eggs was monitored until the adult stage, at each temperature. Nymphs were maintained in individual cages and fed on strawberry fruits of the cultivar Aromas. The mean duration and viability of the egg and nymph stages were calculated by estimating the lower and upper developmental thresholds and the thermal constant, and this information was used to estimate the number of generations per year in different strawberry-producing regions of Brazil. The egg-to-adult duration decreased as temperatures increased, up to 28°C (93.4, 83.2, 43.9, and 31.4 days at 19, 22, 25, and 28°C, respectively). Viability of nymphs was highest between 22 and 28°C. At 30°C, the egg-to-adult duration increased (36 days), while the viability decreased (11.11%). The lower egg-to-adult developmental threshold was 15.2°C and the thermal constant was 418.4 degree-days. Calculating the number of generations indicated that the largest number (5.1 generations yr?1) was obtained for the municipality of Jaboti, Paraná, and the smallest for Caxias do Sul, Rio Grande do Sul (1.9 generations yr?1). Our findings demonstrated that important strawberry-producing regions in Brazil are suitable for the development of N. bilobata. Key words: environmental factors, thermal requirements, predictive models. MenosThe thermal threshold and thermal requirements of Neopamera bilobata were determined, and the number of generations that this species may produce in the main strawberry-producing regions of Brazil was estimated. In a climate chamber (70±10% RH and 12h photophase) at 16, 19, 22, 25, 28, or 30±1°C, the development of 120 eggs was monitored until the adult stage, at each temperature. Nymphs were maintained in individual cages and fed on strawberry fruits of the cultivar Aromas. The mean duration and viability of the egg and nymph stages were calculated by estimating the lower and upper developmental thresholds and the thermal constant, and this information was used to estimate the number of generations per year in different strawberry-producing regions of Brazil. The egg-to-adult duration decreased as temperatures increased, up to 28°C (93.4, 83.2, 43.9, and 31.4 days at 19, 22, 25, and 28°C, respectively). Viability of nymphs was highest between 22 and 28°C. At 30°C, the egg-to-adult duration increased (36 days), while the viability decreased (11.11%). The lower egg-to-adult developmental threshold was 15.2°C and the thermal constant was 418.4 degree-days. Calculating the number of generations indicated that the largest number (5.1 generations yr?1) was obtained for the municipality of Jaboti, Paraná, and the smallest for Caxias do Sul, Rio Grande do Sul (1.9 generations yr?1). Our findings demonstrated that important strawberry-producing regions in Brazil are suitable for the... Mostrar Tudo |
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Palavras-Chave: |
Exigências térmicas; Fatores ambientais; Modelo de previsão; Predictive models; Thermal requirements. |
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Thesaurus NAL: |
Environmental factors. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/170323/1/1678-4596-cr-48-01-e20170212.pdf
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Marc: |
LEADER 02323naa a2200217 a 4500
001 2084243
005 2019-04-30
008 2017 bl uuuu u00u1 u #d
100 1 $aKUHN, T. M. de A.
245 $aThermal requirements and estimated number of generations of Neopamera bilobata (Say) in strawberry-producing regions of Brazil.$h[electronic resource]
260 $c2017
520 $aThe thermal threshold and thermal requirements of Neopamera bilobata were determined, and the number of generations that this species may produce in the main strawberry-producing regions of Brazil was estimated. In a climate chamber (70±10% RH and 12h photophase) at 16, 19, 22, 25, 28, or 30±1°C, the development of 120 eggs was monitored until the adult stage, at each temperature. Nymphs were maintained in individual cages and fed on strawberry fruits of the cultivar Aromas. The mean duration and viability of the egg and nymph stages were calculated by estimating the lower and upper developmental thresholds and the thermal constant, and this information was used to estimate the number of generations per year in different strawberry-producing regions of Brazil. The egg-to-adult duration decreased as temperatures increased, up to 28°C (93.4, 83.2, 43.9, and 31.4 days at 19, 22, 25, and 28°C, respectively). Viability of nymphs was highest between 22 and 28°C. At 30°C, the egg-to-adult duration increased (36 days), while the viability decreased (11.11%). The lower egg-to-adult developmental threshold was 15.2°C and the thermal constant was 418.4 degree-days. Calculating the number of generations indicated that the largest number (5.1 generations yr?1) was obtained for the municipality of Jaboti, Paraná, and the smallest for Caxias do Sul, Rio Grande do Sul (1.9 generations yr?1). Our findings demonstrated that important strawberry-producing regions in Brazil are suitable for the development of N. bilobata. Key words: environmental factors, thermal requirements, predictive models.
650 $aEnvironmental factors
653 $aExigências térmicas
653 $aFatores ambientais
653 $aModelo de previsão
653 $aPredictive models
653 $aThermal requirements
700 1 $aLOECK, A. E.
700 1 $aBOTTON, M.
773 $tCiência Rural, Santa Maria$gv. 48, n. 1, (e20170212), 2017.
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