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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
15/09/2008 |
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Data da última atualização: |
15/09/2008 |
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Autoria: |
AIRA, M.; MCNAMARA, N. P.; PIEARCE, T. G.; DOMÍNGUEZ, J. |
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Título: |
Microbial communities of Lumbricus terrestris (L.) middens: structure, activity and changes through time in relation to earthworm presence. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
We studied the microbial communities (structure and activity) of the soil system formed by
middens of Lumbricus terrestris and the soil below and surrounding them, and the role of
earthworms in maintaining these structures through time. We set up an experiment in which
middens were either left (control) or removed from their original place (manipulated) and left in
a next area free of worms for 2 months. The transplanted middens were in areas with no evident
signs of earthworm activity (e.g. casts). We took samples of middens, soil below and soil
surrounding (control and manipulated) after 1 and 2 months of manipulation and analyzed the
phospholipid fatty acid (PLFA) profiles and measured respiratory fluxes of CO2 and CH4.
Microbial communities of middens clearly differed from those of soil below and surrounding soil
samples; further, in control middens changes in microbial communities were stronger than in
manipulated middens. Moreover, total PLFAs and bacterial PLFAs (gram negative and positive
bacterial PLFAs) were greater in manipulated than control middens, as well as organic C. This
suggests that earthworms may be competing with microorganisms for C sources, since in organic
C of middens with earthworms decreased with time. Fungi PLFAs were higher in middens and
increased in abundance over time, although abundance was not affected by earthworm
presence. Respiratory fluxes of CO2 were always higher in control middens, revealing the main
role of earthworms in enhancing microbial activity of middens MenosWe studied the microbial communities (structure and activity) of the soil system formed by
middens of Lumbricus terrestris and the soil below and surrounding them, and the role of
earthworms in maintaining these structures through time. We set up an experiment in which
middens were either left (control) or removed from their original place (manipulated) and left in
a next area free of worms for 2 months. The transplanted middens were in areas with no evident
signs of earthworm activity (e.g. casts). We took samples of middens, soil below and soil
surrounding (control and manipulated) after 1 and 2 months of manipulation and analyzed the
phospholipid fatty acid (PLFA) profiles and measured respiratory fluxes of CO2 and CH4.
Microbial communities of middens clearly differed from those of soil below and surrounding soil
samples; further, in control middens changes in microbial communities were stronger than in
manipulated middens. Moreover, total PLFAs and bacterial PLFAs (gram negative and positive
bacterial PLFAs) were greater in manipulated than control middens, as well as organic C. This
suggests that earthworms may be competing with microorganisms for C sources, since in organic
C of middens with earthworms decreased with time. Fungi PLFAs were higher in middens and
increased in abundance over time, although abundance was not affected by earthworm
presence. Respiratory fluxes of CO2 were always higher in control middens, revealing the main
role of earthworms in enhancing m... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02295naa a2200157 a 4500
001 1314794
005 2008-09-15
008 2008 bl uuuu u00u1 u #d
100 1 $aAIRA, M.
245 $aMicrobial communities of Lumbricus terrestris (L.) middens$bstructure, activity and changes through time in relation to earthworm presence.
260 $c2008
520 $aWe studied the microbial communities (structure and activity) of the soil system formed by middens of Lumbricus terrestris and the soil below and surrounding them, and the role of earthworms in maintaining these structures through time. We set up an experiment in which middens were either left (control) or removed from their original place (manipulated) and left in a next area free of worms for 2 months. The transplanted middens were in areas with no evident signs of earthworm activity (e.g. casts). We took samples of middens, soil below and soil surrounding (control and manipulated) after 1 and 2 months of manipulation and analyzed the phospholipid fatty acid (PLFA) profiles and measured respiratory fluxes of CO2 and CH4. Microbial communities of middens clearly differed from those of soil below and surrounding soil samples; further, in control middens changes in microbial communities were stronger than in manipulated middens. Moreover, total PLFAs and bacterial PLFAs (gram negative and positive bacterial PLFAs) were greater in manipulated than control middens, as well as organic C. This suggests that earthworms may be competing with microorganisms for C sources, since in organic C of middens with earthworms decreased with time. Fungi PLFAs were higher in middens and increased in abundance over time, although abundance was not affected by earthworm presence. Respiratory fluxes of CO2 were always higher in control middens, revealing the main role of earthworms in enhancing microbial activity of middens
700 1 $aMCNAMARA, N. P.
700 1 $aPIEARCE, T. G.
700 1 $aDOMÍNGUEZ, J.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Cerrados. |
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Data corrente: |
08/05/2013 |
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Data da última atualização: |
14/03/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
GORDO, J. M. L.; SILVA, M. C. da; SOLANO, G. de A.; LOPES, F. B.; COSTA, M. F. O. e; ROCHA, F. E. de C.; FIORAVANTI, M. C. S.; SERENO, J. R. B. |
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Afiliação: |
JOÃO MAURÍCIO LUCAS GORDO, Universidade Federal de Goiás.; MARCELO CORRÊA DA SILVA, UFG; GIANICE DE ALMEIDA SOLANO; FERNANDO BRITO LOPES, UFG; MARCOS FERNANDO OLIVEIRA E COSTA, CNPAF; FRANCISCO EDUARDO DE CASTRO ROCHA, CPAC; MARIA CLORINDA SOARES FIORAVANTI, UFG; JOSE ROBSON BEZERRA SERENO, CPAC. |
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Título: |
Cattle farmers: profile and speech content analysis while undergoing training to adopt artificial insemination in Goiás State, Brazil. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 42, n. 3, p. 162-167, 2013. |
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Idioma: |
Português |
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Conteúdo: |
This study was undertaken to verify major issues present in the discourse of cattle farmers when discussing the use of artificial insemination (AI). Seventy-one beef and dairy cattle farmers in the state of Goiás, Brazil, were interviewed using semi-structured questionnaires during AI training courses in 2010 and 2011. Data analyses were done using the classic method of textual speech content analysis, performing the pre-analytical, analytical and inferential stages. The written questions were separated in elementary context units (ECU) and sorted into similar thematic groups. These groups originated categories and subcategories, which were nominated based on an a posteriori criteria. Overall, personal motivation was the main issue characterizing discourse by farmers about adoption of AI. This motivation stems from the strong points (highlights) and positive expectations AI offers. The positive expectations were mainly related to perceptions of farmers of animal phenotype improvement rather than to the financial features of cattle production. Basic necessity was the second major issue, with emphasis on work force, infrastructure and animal handling, followed by social influence, with eminence of the institutions and people involved with AI and with the everyday life of cattle farmers. The little emphasis on human resource management and on the use of scientific knowledge may have affected the impact of AI over the years, explaining discreet indices of adoption of AI in Brazil. MenosThis study was undertaken to verify major issues present in the discourse of cattle farmers when discussing the use of artificial insemination (AI). Seventy-one beef and dairy cattle farmers in the state of Goiás, Brazil, were interviewed using semi-structured questionnaires during AI training courses in 2010 and 2011. Data analyses were done using the classic method of textual speech content analysis, performing the pre-analytical, analytical and inferential stages. The written questions were separated in elementary context units (ECU) and sorted into similar thematic groups. These groups originated categories and subcategories, which were nominated based on an a posteriori criteria. Overall, personal motivation was the main issue characterizing discourse by farmers about adoption of AI. This motivation stems from the strong points (highlights) and positive expectations AI offers. The positive expectations were mainly related to perceptions of farmers of animal phenotype improvement rather than to the financial features of cattle production. Basic necessity was the second major issue, with emphasis on work force, infrastructure and animal handling, followed by social influence, with eminence of the institutions and people involved with AI and with the everyday life of cattle farmers. The little emphasis on human resource management and on the use of scientific knowledge may have affected the impact of AI over the years, explaining discreet indices of adoption of AI in Brazi... Mostrar Tudo |
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Thesagro: |
Biotecnologia; Inseminação Artificial; Reprodução Animal. |
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Thesaurus NAL: |
animal reproduction; artificial insemination; biotechnology. |
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Categoria do assunto: |
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L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/86892/1/gordo-jml-01-2013.pdf
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Marc: |
LEADER 02372naa a2200277 a 4500
001 2040775
005 2016-03-14
008 2013 bl uuuu u00u1 u #d
100 1 $aGORDO, J. M. L.
245 $aCattle farmers$bprofile and speech content analysis while undergoing training to adopt artificial insemination in Goiás State, Brazil.
260 $c2013
520 $aThis study was undertaken to verify major issues present in the discourse of cattle farmers when discussing the use of artificial insemination (AI). Seventy-one beef and dairy cattle farmers in the state of Goiás, Brazil, were interviewed using semi-structured questionnaires during AI training courses in 2010 and 2011. Data analyses were done using the classic method of textual speech content analysis, performing the pre-analytical, analytical and inferential stages. The written questions were separated in elementary context units (ECU) and sorted into similar thematic groups. These groups originated categories and subcategories, which were nominated based on an a posteriori criteria. Overall, personal motivation was the main issue characterizing discourse by farmers about adoption of AI. This motivation stems from the strong points (highlights) and positive expectations AI offers. The positive expectations were mainly related to perceptions of farmers of animal phenotype improvement rather than to the financial features of cattle production. Basic necessity was the second major issue, with emphasis on work force, infrastructure and animal handling, followed by social influence, with eminence of the institutions and people involved with AI and with the everyday life of cattle farmers. The little emphasis on human resource management and on the use of scientific knowledge may have affected the impact of AI over the years, explaining discreet indices of adoption of AI in Brazil.
650 $aanimal reproduction
650 $aartificial insemination
650 $abiotechnology
650 $aBiotecnologia
650 $aInseminação Artificial
650 $aReprodução Animal
700 1 $aSILVA, M. C. da
700 1 $aSOLANO, G. de A.
700 1 $aLOPES, F. B.
700 1 $aCOSTA, M. F. O. e
700 1 $aROCHA, F. E. de C.
700 1 $aFIORAVANTI, M. C. S.
700 1 $aSERENO, J. R. B.
773 $tRevista Brasileira de Zootecnia$gv. 42, n. 3, p. 162-167, 2013.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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