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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
19/11/2015 |
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Data da última atualização: |
21/06/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ALMEIDA, A. M. R.; HAU, B.; AMORIM, L.; BERGAMIN FILHO, A.; MARIANO, J. C. |
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Afiliação: |
ALVARO MANUEL RODRIGUES ALMEIDA, CNPSO; BERNHARD HAU, Leibniz University Hannover; LILIAN AMORIM, ESALQ; ARMANDO BERGAMIN FILHO, ESALQ; JOAQUIM C. MARIANO, COAMO. |
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Título: |
Tillage system effect on the epidemic of soybean brown spot. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Tropical Plant Pathology, v. 40, Oct. 2015. |
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ISSN: |
1983-2052 |
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DOI: |
10.1007/s40858-015-0052-6 |
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Idioma: |
Inglês |
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Conteúdo: |
Six field experiments were carried out during the summers of 1997 to 2003 to evaluate disease progress of soybean brown spot caused by Septoria glycines considering two tillage systems, conventional and no-tillage (wheat was cultivated during winter in all plots). Two logistic models were fitted to the disease progress data: (i) a logistic model with constant disease progress rate r [y=1/(1+(1/y0-1)exp(-rt)), where y0 is the initial disease level at time t=0] and (ii) a logistic model with an exponentially increasing progress rate r(t)=r0 ebt [y=1/(1+(1/y0-1) exp(r0/b(1-ebt))), where r0 is the initial progress rate at time t=0, b the rate increasing parameter, and y0 again the initial disease level]. The logistic model with constant rate underestimated disease incidence on the first disease assessment in nine out of twelve epidemics. The logistic model with an increasing rate gave a better fit to all disease progress curves (R2 between 0.90 and 0.99; no pattern in the residuals). According to this model, y0 was in most cases (four out of six) significantly smaller in the plots with no-tillage compared with conventional tillage, but no differences were detected in the initial rate parameter r0 and the rate increasing parameter b (with one exception). It is proposed that these results are due to higher susceptibility of old leaflets compared with young leaflets, as demonstrated by artificial inoculation: In four laboratory experiments the mean brown spot severity was 16.7 % on old leaflets but only 3.9 % on young leaflets. MenosSix field experiments were carried out during the summers of 1997 to 2003 to evaluate disease progress of soybean brown spot caused by Septoria glycines considering two tillage systems, conventional and no-tillage (wheat was cultivated during winter in all plots). Two logistic models were fitted to the disease progress data: (i) a logistic model with constant disease progress rate r [y=1/(1+(1/y0-1)exp(-rt)), where y0 is the initial disease level at time t=0] and (ii) a logistic model with an exponentially increasing progress rate r(t)=r0 ebt [y=1/(1+(1/y0-1) exp(r0/b(1-ebt))), where r0 is the initial progress rate at time t=0, b the rate increasing parameter, and y0 again the initial disease level]. The logistic model with constant rate underestimated disease incidence on the first disease assessment in nine out of twelve epidemics. The logistic model with an increasing rate gave a better fit to all disease progress curves (R2 between 0.90 and 0.99; no pattern in the residuals). According to this model, y0 was in most cases (four out of six) significantly smaller in the plots with no-tillage compared with conventional tillage, but no differences were detected in the initial rate parameter r0 and the rate increasing parameter b (with one exception). It is proposed that these results are due to higher susceptibility of old leaflets compared with young leaflets, as demonstrated by artificial inoculation: In four laboratory experiments the mean brown spot severity was 16.7 % on... Mostrar Tudo |
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Thesagro: |
Doença de planta; Fungo; Soja. |
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Thesaurus Nal: |
Fungal brown spot; Fungal diseases of plants; Soybeans. |
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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/133534/1/tillage-system-effect-....pdf
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Marc: |
LEADER 02268naa a2200265 a 4500
001 2029088
005 2017-06-21
008 2015 bl uuuu u00u1 u #d
022 $a1983-2052
024 7 $a10.1007/s40858-015-0052-6$2DOI
100 1 $aALMEIDA, A. M. R.
245 $aTillage system effect on the epidemic of soybean brown spot.$h[electronic resource]
260 $c2015
520 $aSix field experiments were carried out during the summers of 1997 to 2003 to evaluate disease progress of soybean brown spot caused by Septoria glycines considering two tillage systems, conventional and no-tillage (wheat was cultivated during winter in all plots). Two logistic models were fitted to the disease progress data: (i) a logistic model with constant disease progress rate r [y=1/(1+(1/y0-1)exp(-rt)), where y0 is the initial disease level at time t=0] and (ii) a logistic model with an exponentially increasing progress rate r(t)=r0 ebt [y=1/(1+(1/y0-1) exp(r0/b(1-ebt))), where r0 is the initial progress rate at time t=0, b the rate increasing parameter, and y0 again the initial disease level]. The logistic model with constant rate underestimated disease incidence on the first disease assessment in nine out of twelve epidemics. The logistic model with an increasing rate gave a better fit to all disease progress curves (R2 between 0.90 and 0.99; no pattern in the residuals). According to this model, y0 was in most cases (four out of six) significantly smaller in the plots with no-tillage compared with conventional tillage, but no differences were detected in the initial rate parameter r0 and the rate increasing parameter b (with one exception). It is proposed that these results are due to higher susceptibility of old leaflets compared with young leaflets, as demonstrated by artificial inoculation: In four laboratory experiments the mean brown spot severity was 16.7 % on old leaflets but only 3.9 % on young leaflets.
650 $aFungal brown spot
650 $aFungal diseases of plants
650 $aSoybeans
650 $aDoença de planta
650 $aFungo
650 $aSoja
700 1 $aHAU, B.
700 1 $aAMORIM, L.
700 1 $aBERGAMIN FILHO, A.
700 1 $aMARIANO, J. C.
773 $tTropical Plant Pathology$gv. 40, Oct. 2015.
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Registro original: |
Embrapa Soja (CNPSO) |
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Origem |
Tipo/Formato |
Classificação |
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Registro |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
30/01/1998 |
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Data da última atualização: |
22/11/2002 |
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Autoria: |
CUNHA, T. J. F.; RIBEIRO, L. P.; AGUIAR, A. de C. |
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Título: |
Natureza do humus de solos arenosos do Oeste da Bahia. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 26., 1997, Rio de Janeiro, RJ. Resumos... Rio de Janeiro: Sociedade Brasileira de Ciencia do Solo, 1997. p.336. |
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Idioma: |
Português |
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Conteúdo: |
Estudou-se cinco perfis de solos em um propriedade agricola na regiao do oeste baiano visando o entendimento do comportamento das fracoes humificadas da materia organica em funcao do tempo de uso agricola. Foram realizados estudos morfologicos bem como a coleta de amostras de solo para fins de analises laboratoriais. O fracionamento humico foi realizado conforme of principios do metodo de Dabin (1971). Verificou-se que a materia humica dos solos estudados apresenta um comportamento bastante particular, que possivelmente esteja ligado a aportes de calcario, a rotacao de culturas e aos contrastes climaticos. |
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Palavras-Chave: |
Brasil; Humus: Bahia. |
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Thesagro: |
Cerrado; Solo Arenoso. |
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Thesaurus NAL: |
Arenosols; Brazil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01267naa a2200217 a 4500
001 1331432
005 2002-11-22
008 1997 bl uuuu u00u1 u #d
100 1 $aCUNHA, T. J. F.
245 $aNatureza do humus de solos arenosos do Oeste da Bahia.
260 $c1997
520 $aEstudou-se cinco perfis de solos em um propriedade agricola na regiao do oeste baiano visando o entendimento do comportamento das fracoes humificadas da materia organica em funcao do tempo de uso agricola. Foram realizados estudos morfologicos bem como a coleta de amostras de solo para fins de analises laboratoriais. O fracionamento humico foi realizado conforme of principios do metodo de Dabin (1971). Verificou-se que a materia humica dos solos estudados apresenta um comportamento bastante particular, que possivelmente esteja ligado a aportes de calcario, a rotacao de culturas e aos contrastes climaticos.
650 $aArenosols
650 $aBrazil
650 $aCerrado
650 $aSolo Arenoso
653 $aBrasil
653 $aHumus: Bahia
700 1 $aRIBEIRO, L. P.
700 1 $aAGUIAR, A. de C.
773 $tIn: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 26., 1997, Rio de Janeiro, RJ. Resumos... Rio de Janeiro: Sociedade Brasileira de Ciencia do Solo, 1997. p.336.
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