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| 128. |  | CAMPO, R. J.; MIURA, L. M.; HUNGRIA, M. Metodologia de contagem de Bradyrhizobium em semente inoculada e/ou tratada com fungicidas e micronutrientes. In: REUNIÃO DA REDE DE LABORATÓRIOS PARA RECOMENDAÇÃO, PADRONIZAÇÃO E DIFUSÃO DE TECNOLOGIA DE INOCULANTES MICROBIANOS DE INTERESSE AGRÍCOLA (RELARE), 13., 2006, Londrina. Anais... Londrina: Embrapa Soja, 2007. p. 46-47. (Embrapa Soja. Documentos, 290). Organizado por Rubens José Campo, Mariângela Hungria.| Biblioteca(s): Embrapa Soja. |
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| 135. | | HUNGRIA, M.; CAMPO, R. J.; MENDES, I. C. Reinoculation increasing soybean grain yield in Brazil. In: WANG, Y. P.; LIN, M.; TIAN, Z. X.; ELMERICH, C.; NEWTON. W. E. (Ed). Biological nitrogen fixation, sustainable agriculture and the environment. Dordrecht: Springer, 2005. p. 315. (Current Plant Science and Biotechnology in Agriculture, 41). Proceedingsof the 14th International Nitrogen Fixation Congress.| Biblioteca(s): Embrapa Soja. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Soja. |
|
Data corrente: |
27/07/2009 |
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Data da última atualização: |
04/08/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
B - 1 |
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Autoria: |
CAMPO, R. J.; ARAUJO, R. S.; HUNGRIA, M. |
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Afiliação: |
RUBENS JOSÉ CAMPO; RICARDO SILVA ARAÚJO, CNPq-MCT; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
|
Título: |
Nitrogen fixation with the soybean crop in Brazil: compatibility between seed treatment with fungicides and bradyrhizobial inoculants. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Symbiosis, Philadelphia, v. 48, n. 1-3, p. 154-163, Feb. 2009. |
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ISSN: |
0334-5114 |
|
DOI: |
10.1007/BF03179994 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: Biological nitrogen fixation with the soybean crop can be improved by seed inoculation with superiorBradyrhizobium strains, but factors that reducethe population of inoculated bradyrhizobiaon the seedwill directly affect the efficiency of the process. Seed treatment with fungicides has been broadly practiced as cheap insurance against seed-and soil-borne pathogens, but toxicity of most fungicides to bradyrhizobia has often been underestimated. The compatibility between seed treatment with fungicides in single or mixed applications (including Benomyl, Captan, Carbendazin, Carboxin, Difenoconazole, Thiabendazole, Thiram, Tolylfluanid) and bradyrhizobial inoculants was examined in laboratory, greenhouse and field experiments during five crop seasons in Brazil. Bacterial survivalon the seeds was severely affected by all fungicides, resulting in mortalities of up to 62% after only 2 h and of 95% after 24 h. Fungicides also reduced nodule number, total N in grains and decreased yield by up to 17%. The toxic effects of fungicides were more drastic in sandy soils without soybean inoculation and cropping history, reducing nodulation by up to 87%, but were also important in areas with established populations of soybean bradyrhizobia. Therefore, fungicides should be used only when the seeds or soil are contaminated with pathogens, otherwise biological N2 fixation may be severely affected. |
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Thesagro: |
Fixação de Nitrogênio; Fungicida; Inoculação; Soja. |
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Categoria do assunto: |
-- |
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Marc: |
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100 1 $aCAMPO, R. J.
245 $aNitrogen fixation with the soybean crop in Brazil$bcompatibility between seed treatment with fungicides and bradyrhizobial inoculants.
260 $c2009
520 $aABSTRACT: Biological nitrogen fixation with the soybean crop can be improved by seed inoculation with superiorBradyrhizobium strains, but factors that reducethe population of inoculated bradyrhizobiaon the seedwill directly affect the efficiency of the process. Seed treatment with fungicides has been broadly practiced as cheap insurance against seed-and soil-borne pathogens, but toxicity of most fungicides to bradyrhizobia has often been underestimated. The compatibility between seed treatment with fungicides in single or mixed applications (including Benomyl, Captan, Carbendazin, Carboxin, Difenoconazole, Thiabendazole, Thiram, Tolylfluanid) and bradyrhizobial inoculants was examined in laboratory, greenhouse and field experiments during five crop seasons in Brazil. Bacterial survivalon the seeds was severely affected by all fungicides, resulting in mortalities of up to 62% after only 2 h and of 95% after 24 h. Fungicides also reduced nodule number, total N in grains and decreased yield by up to 17%. The toxic effects of fungicides were more drastic in sandy soils without soybean inoculation and cropping history, reducing nodulation by up to 87%, but were also important in areas with established populations of soybean bradyrhizobia. Therefore, fungicides should be used only when the seeds or soil are contaminated with pathogens, otherwise biological N2 fixation may be severely affected.
650 $aFixação de Nitrogênio
650 $aFungicida
650 $aInoculação
650 $aSoja
700 1 $aARAUJO, R. S.
700 1 $aHUNGRIA, M.
773 $tSymbiosis, Philadelphia$gv. 48, n. 1-3, p. 154-163, Feb. 2009.
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