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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
16/09/1996 |
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Data da última atualização: |
16/09/1996 |
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Autoria: |
BODDEY, R. M.; OLIVEIRA, O. C. de; URQUIAGA, S.; REIS, V. M.; OLIVARES, F. L. de; BALDANI, V. L. D.; DOBEREINER, Johanna. |
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Título: |
Biological nitrogen fixation associated with sugar cane and rice: Contributions and prospects for improvement. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Plant and Soil, Netherlands, v. 174, p. 195-209, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
15N isotope and N balance studies performed over the last few years have shown that several Brazilian varieties of sugarcane are capable of obtaining over 60% of their nitrogen (>150 kg N ha-1 year-1) from biological nitrogen fixation (BNF). This may be due to the fact that this crop in Brazil has been systematically bred for high yields with low fertilizer N inputs. In the case of wetland rice, N balance experiments performed both in the field and in pots suggest that 30 to 60 N ha-1 crop-1 may be obtained from plant-associated BNF and that different varieties have different capacities to obtain N from this source. 15N2 incorporation studies have proved that wetland rice can obtain at least some N from BNF and acetylene reduction (AR) assays also indicate differences in N2-fixing ability between different rice varieties. However in situ AR field estimates suggest plant-associated BNF inputs to be less than 8 kg N ha-1 crop-1. The problems associated with the use of the 15N dilution technique for BNF quantification are discussed and illustrated with data from a recent study performed at EMBRAPA-CNPAB. Although many species of diazotrophs have been isolated from the rhizosphere of both sugarcane and wetland rice, the recent discovery of endophytic N2-fixing bacteria within roots, shoots and leaves of both crops suggests, at least in the case of sugarcane, that these bacteria may be the most important contributors to the observed BNF contributions. In sugarcane both Acetobacter diazotrophicus and ... Menos15N isotope and N balance studies performed over the last few years have shown that several Brazilian varieties of sugarcane are capable of obtaining over 60% of their nitrogen (>150 kg N ha-1 year-1) from biological nitrogen fixation (BNF). This may be due to the fact that this crop in Brazil has been systematically bred for high yields with low fertilizer N inputs. In the case of wetland rice, N balance experiments performed both in the field and in pots suggest that 30 to 60 N ha-1 crop-1 may be obtained from plant-associated BNF and that different varieties have different capacities to obtain N from this source. 15N2 incorporation studies have proved that wetland rice can obtain at least some N from BNF and acetylene reduction (AR) assays also indicate differences in N2-fixing ability between different rice varieties. However in situ AR field estimates suggest plant-associated BNF inputs to be less than 8 kg N ha-1 crop-1. The problems associated with the use of the 15N dilution technique for BNF quantification are discussed and illustrated with data from a recent study performed at EMBRAPA-CNPAB. Although many species of diazotrophs have been isolated from the rhizosphere of both sugarcane and wetland rice, the recent discovery of endophytic N2-fixing bacteria within roots, shoots and leaves of both crops suggests, at least in the case of sugarcane, that these bacteria may be the most important contributors to the observed BNF contributions. In sugarcane both Acetoba... Mostrar Tudo |
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Palavras-Chave: |
Acetobacter diazotrophicus; BNF; FBN; Fixacao biologica de nitrogenio; Nitrogen fixing bacteria. |
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Thesagro: |
Arroz; Cana de Açúcar. |
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Thesaurus Nal: |
Herbaspirillum; rice; sugarcane. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02419naa a2200313 a 4500
001 1600502
005 1996-09-16
008 1995 bl --- 0-- u #d
100 1 $aBODDEY, R. M.
245 $aBiological nitrogen fixation associated with sugar cane and rice$bContributions and prospects for improvement.
260 $c1995
520 $a15N isotope and N balance studies performed over the last few years have shown that several Brazilian varieties of sugarcane are capable of obtaining over 60% of their nitrogen (>150 kg N ha-1 year-1) from biological nitrogen fixation (BNF). This may be due to the fact that this crop in Brazil has been systematically bred for high yields with low fertilizer N inputs. In the case of wetland rice, N balance experiments performed both in the field and in pots suggest that 30 to 60 N ha-1 crop-1 may be obtained from plant-associated BNF and that different varieties have different capacities to obtain N from this source. 15N2 incorporation studies have proved that wetland rice can obtain at least some N from BNF and acetylene reduction (AR) assays also indicate differences in N2-fixing ability between different rice varieties. However in situ AR field estimates suggest plant-associated BNF inputs to be less than 8 kg N ha-1 crop-1. The problems associated with the use of the 15N dilution technique for BNF quantification are discussed and illustrated with data from a recent study performed at EMBRAPA-CNPAB. Although many species of diazotrophs have been isolated from the rhizosphere of both sugarcane and wetland rice, the recent discovery of endophytic N2-fixing bacteria within roots, shoots and leaves of both crops suggests, at least in the case of sugarcane, that these bacteria may be the most important contributors to the observed BNF contributions. In sugarcane both Acetobacter diazotrophicus and ...
650 $aHerbaspirillum
650 $arice
650 $asugarcane
650 $aArroz
650 $aCana de Açúcar
653 $aAcetobacter diazotrophicus
653 $aBNF
653 $aFBN
653 $aFixacao biologica de nitrogenio
653 $aNitrogen fixing bacteria
700 1 $aOLIVEIRA, O. C. de
700 1 $aURQUIAGA, S.
700 1 $aREIS, V. M.
700 1 $aOLIVARES, F. L. de
700 1 $aBALDANI, V. L. D.
700 1 $aDOBEREINER, Johanna.
773 $tPlant and Soil, Netherlands$gv. 174, p. 195-209, 1995.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Soja. |
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Data corrente: |
05/06/2013 |
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Data da última atualização: |
10/03/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MONTEZANO, D. G.; SPECHT, A.; BORTOLIN, T. M.; FRONZA, E.; SOSA-GOMEZ, D.R.; ROQUE-SPECHT, V. F.; PEZZI, P.; LUZ, P. C.; BARROS, N. M. |
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Afiliação: |
DÉBORA G. MONTEZANO, Universidade de Caxias do Sul; ALEXANDRE SPECHT, CPAC; TARCISO M. BORTOLIN, Gravena - Pesquisa, Consultoria e Treinamento Agrícola Ltda; EDEGAR FRONZA, Universidade de Caxias do Sul; DANIEL RICARDO SOSA GOMEZ, CNPSO; VÂNIA F. ROQUE-SPECHT, Universidade de Brasília; PATRÍCIA PEZZI, Universidade de Caxias do Sul; PRISCILA C. LUZ, Universidade de Caxias do Sul; NEIVA M. BARROS, Universidade de Caxias do Sul. |
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Título: |
Immature stages of Spodoptera albula (walker) (Lepidoptera: Noctuidae): developmental parameters and host plants. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Anais da Academia Brasileira de Ciências, v. 85, n.1, p. 271-284, 2013. |
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Idioma: |
Inglês
Português |
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Conteúdo: |
This study aimed to detail the temporal and morphological parameters of the immature stages of Spodoptera albula (Walker 1857) under controlled conditions (25 ± 1°C, 70 ± 10% RH and 14 hour photophase) and to gather information about their larval host plants. For this purpose, a new rearing method and artificial diet was employed and validated. The viability of the egg, larval, pupal and pre-pupal stages was 94.54, 97.33, 93.84 and 92.34%, respectively. The average duration of the egg, larval, pupal and pre-pupal stages was 4.14, 16.37, 1.69, and 9.34 days, respectively. During the larval stage, 80.85% of females and 93.99% of males passed through six and remaining through seven instars, with significant larval protandry. The larvae that developed through six and seven instars exhibited a mean growth rate of 1.58 and 1.48, respectively. Fifty five host plant species belonging to 29 families are listed. The female pupae were significantly larger, exhibiting protogyny. Both the rearing methods as well as the larval diet proved adequate, providing more detailled observations of the biological cycle, especially the larval stage, and resulting in an overall survival of almost 80%. |
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Palavras-Chave: |
Armyworm; Artificial diet; Desenvolvimento; Development; Life cycle; Plant pest; Rearing methods. |
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Thesagro: |
Ciclo de Vida; Inseto; Lagarta; Método de Criação; Praga. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/86897/1/montezano-dg-01-2013.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/85790/1/Immature-stages-of-Spodoptera-albula-Walker-Lepidoptera-Noctuidae-Developmental-parameters-and-host-plants.pdf
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Marc: |
LEADER 02209naa a2200361 a 4500
001 1959402
005 2014-03-10
008 2013 bl uuuu u00u1 u #d
100 1 $aMONTEZANO, D. G.
245 $aImmature stages of Spodoptera albula (walker) (Lepidoptera$bNoctuidae): developmental parameters and host plants.$h[electronic resource]
260 $c2013
520 $aThis study aimed to detail the temporal and morphological parameters of the immature stages of Spodoptera albula (Walker 1857) under controlled conditions (25 ± 1°C, 70 ± 10% RH and 14 hour photophase) and to gather information about their larval host plants. For this purpose, a new rearing method and artificial diet was employed and validated. The viability of the egg, larval, pupal and pre-pupal stages was 94.54, 97.33, 93.84 and 92.34%, respectively. The average duration of the egg, larval, pupal and pre-pupal stages was 4.14, 16.37, 1.69, and 9.34 days, respectively. During the larval stage, 80.85% of females and 93.99% of males passed through six and remaining through seven instars, with significant larval protandry. The larvae that developed through six and seven instars exhibited a mean growth rate of 1.58 and 1.48, respectively. Fifty five host plant species belonging to 29 families are listed. The female pupae were significantly larger, exhibiting protogyny. Both the rearing methods as well as the larval diet proved adequate, providing more detailled observations of the biological cycle, especially the larval stage, and resulting in an overall survival of almost 80%.
650 $aCiclo de Vida
650 $aInseto
650 $aLagarta
650 $aMétodo de Criação
650 $aPraga
653 $aArmyworm
653 $aArtificial diet
653 $aDesenvolvimento
653 $aDevelopment
653 $aLife cycle
653 $aPlant pest
653 $aRearing methods
700 1 $aSPECHT, A.
700 1 $aBORTOLIN, T. M.
700 1 $aFRONZA, E.
700 1 $aSOSA-GOMEZ, D.R.
700 1 $aROQUE-SPECHT, V. F.
700 1 $aPEZZI, P.
700 1 $aLUZ, P. C.
700 1 $aBARROS, N. M.
773 $tAnais da Academia Brasileira de Ciências$gv. 85, n.1, p. 271-284, 2013.
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Registro original: |
Embrapa Cerrados (CPAC) |
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