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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
12/06/2006 |
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Data da última atualização: |
07/08/2018 |
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Tipo da produção científica: |
Documentos |
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Autoria: |
OLIVEIRA, C. A. V.; CORREIA, R. C.; SILVA, C. N. da; CUNHA, W. da; FERREIRA, T. V. do C. |
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Afiliação: |
CARLOS ALBERTO VASCONCELOS OLIVEIRA, CPATSA; REBERT COELHO CORREIA, CPATSA; Carliene Nunes da Silva; Willany da Cunha; Tânia Valéria do Carmo Ferreira. |
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Título: |
Zoneamento e tipificação dos sistemas agrícolas do município de Anagé-BA. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Petrolina: EMBRAPA-CPATSA, 1999. |
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Páginas: |
21 p. |
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Descrição Física: |
il. |
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Série: |
(EMBRAPA-CPATSA. Documentos, 94). |
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Idioma: |
Português |
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Conteúdo: |
Caracterização do município; Metodologia; Resultados e discussão. |
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Palavras-Chave: |
Anagé; Bahia; Município; Sistema agrícola; Tipificação. |
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Thesagro: |
Pequeno Produtor. |
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Categoria do assunto: |
B Sociologia Rural |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPATSA/33637/1/SDC94.pdf
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Marc: |
LEADER 00785nam a2200253 a 4500
001 1157331
005 2018-08-07
008 1999 bl uuuu u0uu1 u #d
100 1 $aOLIVEIRA, C. A. V.
245 $aZoneamento e tipificação dos sistemas agrícolas do município de Anagé-BA.$h[electronic resource]
260 $aPetrolina: EMBRAPA-CPATSA$c1999
300 $a21 p.$cil.
490 $a(EMBRAPA-CPATSA. Documentos, 94).
520 $aCaracterização do município; Metodologia; Resultados e discussão.
650 $aPequeno Produtor
653 $aAnagé
653 $aBahia
653 $aMunicípio
653 $aSistema agrícola
653 $aTipificação
700 1 $aCORREIA, R. C.
700 1 $aSILVA, C. N. da
700 1 $aCUNHA, W. da
700 1 $aFERREIRA, T. V. do C.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
09/06/2008 |
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Data da última atualização: |
17/11/2015 |
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Autoria: |
CHAER, G. M. |
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Afiliação: |
Guilherme Montandon Chaer, Embrapa Agrobiologia. |
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Título: |
Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
2008. 136 p. Tese (Doutorado) - Oregon State University, Oregon, USA. |
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Idioma: |
Inglês |
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Notas: |
Oregon State University.
Orientador: Peter J. Bottomley. |
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Conteúdo: |
General introduction; Land use impact on the stability of soil microbial community composition and enzyme activities to heat shock; Shifts in microbial community composition and physiological profiles across a gradient of induced soil degradation (GRIND); Development and validation of a soil quality index based on the equilibrium between soil organic matter and biochemical properties in an undisturbed forest ecosystem.
The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to evaluate differences in the stability of soil enzymes (laccase, cellulase and fluorescein diacetate hydrolysis) and microbial community composition as determined by phospholipid fatty acid (PLFA) analysis. The conversion of land use from forest to agriculture resulted in a new microbial community that was less functionally stable. Loss of stability was indicated by the reduced of laccase and cellulase activities in the agricultural soil, which suggested a less diverse community of microorganisms capable of producing these enzymes. The second study examined changes in microbial community composition and diversity that occurred across a gradient of soil disturbance. Disturbances were simulated by tillage events applied at different intensities to a 12-year-old fallow area. These treatments caused degradation of several soil physico-chemical properties, and alterations in microbial structure based on PLFA and terminal restriction fragment length polymorphism (T-RFLP) analyses, and in metabolic potential based on community level physiological profiles (CLPPs). Multivariate ordination of soil properties revealed the formation of a linear gradient of soil degradation that was significantly correlated with CLPPs, but not with T-RFLP and PLFA profiles. Nevertheless, changes observed in microbial community structure were significantly associated with decreases in soil organic C and field hydraulic conductivity. The third study demonstrated that undisturbed forest soils from western Oregon express an equilibrium between soil organic matter and biochemical properties. A model fitted through multiple regression analysis showed that phosphatase activity and microbial biomass were able to explain 97% of the soil organic C in these soils. This equilibrium was disrupted when a soil from an old-growth site was submitted to chemical stresses (Cu addition or pH alteration) and physical disturbances (wet-dry or freeze-thaw cycles). The magnitude of this disruption was consistently expressed by the ratio between soil C predicted by the model (Cp), and soil C that was measured (Cm). This ratio is proposed as biochemically-based index of soil quality. MenosGeneral introduction; Land use impact on the stability of soil microbial community composition and enzyme activities to heat shock; Shifts in microbial community composition and physiological profiles across a gradient of induced soil degradation (GRIND); Development and validation of a soil quality index based on the equilibrium between soil organic matter and biochemical properties in an undisturbed forest ecosystem.
The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to evaluate differences in the stability of soil enzymes (laccase, cellulase and fluorescein diacetate hydrolysis) and microbial community composition as determined by phospholipid fatty acid (PLFA) analysis. The conversion of land use from forest to agriculture resulted in a new microbial community that was less functionally stable. Loss of stability was indicated by the reduced of laccase and cellulase activities in the agricultural soil, which suggested a less diverse community of microorganisms capable of producing these enzymes. The second study examined changes in microbial community composition and diversity that occurred across a gradient of soil disturbance. Disturbances were simulated by tillage events applied at different intensiti... Mostrar Tudo |
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Palavras-Chave: |
Degradação do solo; Qualidade do solo; Solo microbiano; Sustentabilidade; Utilização da terra. |
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Thesagro: |
Ecossistema. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03604nam a2200193 a 4500
001 1629979
005 2015-11-17
008 2008 bl uuuu m 00u1 u #d
100 1 $aCHAER, G. M.
245 $aResponse of soil microbial communities to physical and chemical disturbances$bimplications for soil quality and land use sustainability.
260 $a2008. 136 p. Tese (Doutorado) - Oregon State University, Oregon, USA.$c2008
500 $aOregon State University. Orientador: Peter J. Bottomley.
520 $aGeneral introduction; Land use impact on the stability of soil microbial community composition and enzyme activities to heat shock; Shifts in microbial community composition and physiological profiles across a gradient of induced soil degradation (GRIND); Development and validation of a soil quality index based on the equilibrium between soil organic matter and biochemical properties in an undisturbed forest ecosystem. The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to evaluate differences in the stability of soil enzymes (laccase, cellulase and fluorescein diacetate hydrolysis) and microbial community composition as determined by phospholipid fatty acid (PLFA) analysis. The conversion of land use from forest to agriculture resulted in a new microbial community that was less functionally stable. Loss of stability was indicated by the reduced of laccase and cellulase activities in the agricultural soil, which suggested a less diverse community of microorganisms capable of producing these enzymes. The second study examined changes in microbial community composition and diversity that occurred across a gradient of soil disturbance. Disturbances were simulated by tillage events applied at different intensities to a 12-year-old fallow area. These treatments caused degradation of several soil physico-chemical properties, and alterations in microbial structure based on PLFA and terminal restriction fragment length polymorphism (T-RFLP) analyses, and in metabolic potential based on community level physiological profiles (CLPPs). Multivariate ordination of soil properties revealed the formation of a linear gradient of soil degradation that was significantly correlated with CLPPs, but not with T-RFLP and PLFA profiles. Nevertheless, changes observed in microbial community structure were significantly associated with decreases in soil organic C and field hydraulic conductivity. The third study demonstrated that undisturbed forest soils from western Oregon express an equilibrium between soil organic matter and biochemical properties. A model fitted through multiple regression analysis showed that phosphatase activity and microbial biomass were able to explain 97% of the soil organic C in these soils. This equilibrium was disrupted when a soil from an old-growth site was submitted to chemical stresses (Cu addition or pH alteration) and physical disturbances (wet-dry or freeze-thaw cycles). The magnitude of this disruption was consistently expressed by the ratio between soil C predicted by the model (Cp), and soil C that was measured (Cm). This ratio is proposed as biochemically-based index of soil quality.
650 $aEcossistema
653 $aDegradação do solo
653 $aQualidade do solo
653 $aSolo microbiano
653 $aSustentabilidade
653 $aUtilização da terra
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