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| Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
12/03/2004 |
Data da última atualização: |
04/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
RODRIGUES, F. Á.; VALE, F. X. R.; DATNOFF, L. E.; PRABHU, A. S.; KORNDÖRFER, G. H. |
Afiliação: |
ANNE SITARAMA PRABHU, CNPAF. |
Título: |
Effect of rice growth stages and silicon on sheath blight development. |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
Phytopathology, v. 93, n. 3, p. 256-261, Mar. 2003. |
DOI: |
10.1094/PHYTO.2003.93.3.256 |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to determine the effect of silicon (Si) and rice growth stages on tissue susceptibility to sheath blight (Rhizoctonia solani Kühn) under controlled conditions. Rice plants (cv. Rio Formoso) were grown in pots containing low-Si soil amended with Si at 0, 0.48, 0.96, 1.44, and 1.92 g pot(-1) and inoculated with R. solani at the following days after emergence: 45 (four-leaf stage), 65 (eight-leaf stage), 85 (tillering), 117 (booting), and 130 (panicle exsertion). For plants inoculated with R. solani at all growth stages, Si concentration in straw increased as rate of Si increased from 0 to 1.92 g pot(-1). Concentration of calcium in the straw did not differ among plant growth stages. Although incubation period was not affected by the amount of Si added to the soil, this variable was shorter at booting and panicle exsertion stages. As the rates of Si increased in the soil, the total number of sheath blight lesions on sheaths and total area under the relative lesion extension curve decreased at all plant growth stages. The severity of sheath blight was lower at booting and panicle exsertion stages as the rates of Si increased in the soil. In general, plants grown in Si-nonamended pots and inoculated with R. solani were more vulnerable to infection at all growth stages, but especially at 45 days after emergence. Plant dry weights for inoculated plants increased as the Si rates increased from 0 to 1.92 g pot(-1). The greatest dry weight increases occurred for plants inoculated at booting and panicle exsertion stages. Si fertilization is a promising method for controlling sheath blight in areas where soil is Si deficient and when cultivars that exhibit an acceptable level of resistance to sheath blight are not available for commercial use. MenosThe objective of this study was to determine the effect of silicon (Si) and rice growth stages on tissue susceptibility to sheath blight (Rhizoctonia solani Kühn) under controlled conditions. Rice plants (cv. Rio Formoso) were grown in pots containing low-Si soil amended with Si at 0, 0.48, 0.96, 1.44, and 1.92 g pot(-1) and inoculated with R. solani at the following days after emergence: 45 (four-leaf stage), 65 (eight-leaf stage), 85 (tillering), 117 (booting), and 130 (panicle exsertion). For plants inoculated with R. solani at all growth stages, Si concentration in straw increased as rate of Si increased from 0 to 1.92 g pot(-1). Concentration of calcium in the straw did not differ among plant growth stages. Although incubation period was not affected by the amount of Si added to the soil, this variable was shorter at booting and panicle exsertion stages. As the rates of Si increased in the soil, the total number of sheath blight lesions on sheaths and total area under the relative lesion extension curve decreased at all plant growth stages. The severity of sheath blight was lower at booting and panicle exsertion stages as the rates of Si increased in the soil. In general, plants grown in Si-nonamended pots and inoculated with R. solani were more vulnerable to infection at all growth stages, but especially at 45 days after emergence. Plant dry weights for inoculated plants increased as the Si rates increased from 0 to 1.92 g pot(-1). The greatest dry weight increases occ... Mostrar Tudo |
Thesagro: |
Arroz; Cálcio; Oryza Sativa; Rhizoctonia Solani. |
Thesaurus Nal: |
Calcium silicate; Rice; Silicon. |
Categoria do assunto: |
H Saúde e Patologia |
Marc: |
LEADER 02530naa a2200265 a 4500 001 1211956 005 2022-05-04 008 2003 bl uuuu u00u1 u #d 024 7 $a10.1094/PHYTO.2003.93.3.256$2DOI 100 1 $aRODRIGUES, F. Á. 245 $aEffect of rice growth stages and silicon on sheath blight development.$h[electronic resource] 260 $c2003 520 $aThe objective of this study was to determine the effect of silicon (Si) and rice growth stages on tissue susceptibility to sheath blight (Rhizoctonia solani Kühn) under controlled conditions. Rice plants (cv. Rio Formoso) were grown in pots containing low-Si soil amended with Si at 0, 0.48, 0.96, 1.44, and 1.92 g pot(-1) and inoculated with R. solani at the following days after emergence: 45 (four-leaf stage), 65 (eight-leaf stage), 85 (tillering), 117 (booting), and 130 (panicle exsertion). For plants inoculated with R. solani at all growth stages, Si concentration in straw increased as rate of Si increased from 0 to 1.92 g pot(-1). Concentration of calcium in the straw did not differ among plant growth stages. Although incubation period was not affected by the amount of Si added to the soil, this variable was shorter at booting and panicle exsertion stages. As the rates of Si increased in the soil, the total number of sheath blight lesions on sheaths and total area under the relative lesion extension curve decreased at all plant growth stages. The severity of sheath blight was lower at booting and panicle exsertion stages as the rates of Si increased in the soil. In general, plants grown in Si-nonamended pots and inoculated with R. solani were more vulnerable to infection at all growth stages, but especially at 45 days after emergence. Plant dry weights for inoculated plants increased as the Si rates increased from 0 to 1.92 g pot(-1). The greatest dry weight increases occurred for plants inoculated at booting and panicle exsertion stages. Si fertilization is a promising method for controlling sheath blight in areas where soil is Si deficient and when cultivars that exhibit an acceptable level of resistance to sheath blight are not available for commercial use. 650 $aCalcium silicate 650 $aRice 650 $aSilicon 650 $aArroz 650 $aCálcio 650 $aOryza Sativa 650 $aRhizoctonia Solani 700 1 $aVALE, F. X. R. 700 1 $aDATNOFF, L. E. 700 1 $aPRABHU, A. S. 700 1 $aKORNDÖRFER, G. H. 773 $tPhytopathology$gv. 93, n. 3, p. 256-261, Mar. 2003.
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Embrapa Arroz e Feijão (CNPAF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
09/04/2007 |
Data da última atualização: |
22/04/2016 |
Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
Autoria: |
FRANÇA, F. M. C.; HOLANDA JUNIOR, E. V.; MARTINS, E. C.; MEDEIROS, H. R. de; SOUSA NETO, J. M. de. |
Afiliação: |
EVANDRO VASCONCELOS HOLANDA JUNIOR, CNPC; ESPEDITO CEZARIO MARTINS, CNPC. |
Título: |
Análise econômica e financeira de um modelo teórico de produção de carne ovina e caprina para unidades familiares no semi-árido do Rio Grande do Norte. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
In: LIMA, G. F. da C.; HOLANDA JÚNIOR, E. V.; MACIEL, F. C.; BARROS, N. N.; AMORIM, M. V.; CONFESSOR JÚNIOR, A. A. (Org.). Criação familiar de caprinos e ovinos no Rio Grande do Norte: orientações para viabilidade do negócio rural. Natal: EMATER-RN: EMPARN: Embrapa Caprinos, 2006. Cap. 6, p. 121-143. |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Caprino de corte; Ovino de corte; Rio Grande do Norte; Smallholders. |
Thesagro: |
Agricultura familiar; Análise econômica; Carne; Economia agrícola; Modelo de simulação; Sistema de produção. |
Thesaurus NAL: |
Agricultural economics; Brazil; Goats; Meat production; Sheep; Simulation models. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01347naa a2200361 a 4500 001 1534387 005 2016-04-22 008 2006 bl uuuu u00u1 u #d 100 1 $aFRANÇA, F. M. C. 245 $aAnálise econômica e financeira de um modelo teórico de produção de carne ovina e caprina para unidades familiares no semi-árido do Rio Grande do Norte. 260 $c2006 650 $aAgricultural economics 650 $aBrazil 650 $aGoats 650 $aMeat production 650 $aSheep 650 $aSimulation models 650 $aAgricultura familiar 650 $aAnálise econômica 650 $aCarne 650 $aEconomia agrícola 650 $aModelo de simulação 650 $aSistema de produção 653 $aBrasil 653 $aCaprino de corte 653 $aOvino de corte 653 $aRio Grande do Norte 653 $aSmallholders 700 1 $aHOLANDA JUNIOR, E. V. 700 1 $aMARTINS, E. C. 700 1 $aMEDEIROS, H. R. de 700 1 $aSOUSA NETO, J. M. de 773 $tIn: LIMA, G. F. da C.; HOLANDA JÚNIOR, E. V.; MACIEL, F. C.; BARROS, N. N.; AMORIM, M. V.; CONFESSOR JÚNIOR, A. A. (Org.). Criação familiar de caprinos e ovinos no Rio Grande do Norte: orientações para viabilidade do negócio rural. Natal: EMATER-RN: EMPARN: Embrapa Caprinos, 2006. Cap. 6, p. 121-143.
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