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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Meio-Norte. |
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Data corrente: |
17/09/1997 |
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Data da última atualização: |
07/10/2010 |
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Autoria: |
MENDES, I. de C. |
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Título: |
Microbiology of soil aggregates recovered from different crop management systems. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Corvallis: Oregon State University, 1997. |
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Páginas: |
138p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Thesis. |
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Conteúdo: |
My thesis research examined the relationship between soil structure and soil microorganisms. I examined the distribution of microbial biomass and its activities across soil aggregates and also the distribution across aggregates of a specific soil bacterium, Rhizobium leguminosarum bv trifolii. These distributions were evaluated in a summer vegetable cropping system in which three winter cover-crop treatments are practiced (fallow; cereal and legume). Five aggregate size classes (<0.25, 0.25 to0.5, 0.5 to 1.0, 1.0 to 2.0 and 2.0 to 5.0 mm) were obtained from each treatment by a dry sieving procedure. The distributions of total organic C (TOC), total Kjeldahl N (TKN), total soil bacterial population, microbial biomass C (MBC), mineralizable C and N (Min.C and Min.N), and two enzyme activities (B-glucosidase, FDA-hydrolysis) were measured after cover crop incorporation at seedbed preparation (June), and after harvest of the sweet-corn or broccoli summer crop (September). Immunofluorescence direct count microscopy (IFDC) and the plant infection soil dilution technique (MPN) were used to examine the seasonal distribution of R. leguminosarum bv trifolii across the same soil aggregate preparations. Despite the cover crop treatmens having been in place for seven years, they have not influenced the overall level of TOC, TKN, and aggregate size distribution. Cover crop effects on microbial soil interactions were subtle, often being seen at specific sampling times and interacting with aggregate size. Rhizobium serotype ... MenosMy thesis research examined the relationship between soil structure and soil microorganisms. I examined the distribution of microbial biomass and its activities across soil aggregates and also the distribution across aggregates of a specific soil bacterium, Rhizobium leguminosarum bv trifolii. These distributions were evaluated in a summer vegetable cropping system in which three winter cover-crop treatments are practiced (fallow; cereal and legume). Five aggregate size classes (<0.25, 0.25 to0.5, 0.5 to 1.0, 1.0 to 2.0 and 2.0 to 5.0 mm) were obtained from each treatment by a dry sieving procedure. The distributions of total organic C (TOC), total Kjeldahl N (TKN), total soil bacterial population, microbial biomass C (MBC), mineralizable C and N (Min.C and Min.N), and two enzyme activities (B-glucosidase, FDA-hydrolysis) were measured after cover crop incorporation at seedbed preparation (June), and after harvest of the sweet-corn or broccoli summer crop (September). Immunofluorescence direct count microscopy (IFDC) and the plant infection soil dilution technique (MPN) were used to examine the seasonal distribution of R. leguminosarum bv trifolii across the same soil aggregate preparations. Despite the cover crop treatmens having been in place for seven years, they have not influenced the overall level of TOC, TKN, and aggregate size distribution. Cover crop effects on microbial soil interactions were subtle, often being seen at specific sampling times and interacting with... Mostrar Tudo |
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Palavras-Chave: |
Microrganisms. |
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Thesagro: |
Bactéria; Biomassa; Estrutura do Solo; Microbiologia do Solo; Microrganismo; População Microbiana; Rhizobium Leguminosarum. |
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Thesaurus Nal: |
biomass; microbiology; soil biology; soil structure. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02294nam a2200277 a 4500
001 1557092
005 2010-10-07
008 1997 bl uuuu m 00u1 u #d
100 1 $aMENDES, I. de C.
245 $aMicrobiology of soil aggregates recovered from different crop management systems.
260 $aCorvallis: Oregon State University$c1997
300 $a138p.
500 $aPh.D. Thesis.
520 $aMy thesis research examined the relationship between soil structure and soil microorganisms. I examined the distribution of microbial biomass and its activities across soil aggregates and also the distribution across aggregates of a specific soil bacterium, Rhizobium leguminosarum bv trifolii. These distributions were evaluated in a summer vegetable cropping system in which three winter cover-crop treatments are practiced (fallow; cereal and legume). Five aggregate size classes (<0.25, 0.25 to0.5, 0.5 to 1.0, 1.0 to 2.0 and 2.0 to 5.0 mm) were obtained from each treatment by a dry sieving procedure. The distributions of total organic C (TOC), total Kjeldahl N (TKN), total soil bacterial population, microbial biomass C (MBC), mineralizable C and N (Min.C and Min.N), and two enzyme activities (B-glucosidase, FDA-hydrolysis) were measured after cover crop incorporation at seedbed preparation (June), and after harvest of the sweet-corn or broccoli summer crop (September). Immunofluorescence direct count microscopy (IFDC) and the plant infection soil dilution technique (MPN) were used to examine the seasonal distribution of R. leguminosarum bv trifolii across the same soil aggregate preparations. Despite the cover crop treatmens having been in place for seven years, they have not influenced the overall level of TOC, TKN, and aggregate size distribution. Cover crop effects on microbial soil interactions were subtle, often being seen at specific sampling times and interacting with aggregate size. Rhizobium serotype ...
650 $abiomass
650 $amicrobiology
650 $asoil biology
650 $asoil structure
650 $aBactéria
650 $aBiomassa
650 $aEstrutura do Solo
650 $aMicrobiologia do Solo
650 $aMicrorganismo
650 $aPopulação Microbiana
650 $aRhizobium Leguminosarum
653 $aMicrorganisms
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 403 | |
| 13. |  | MENDES, I. C.; BOTTOMLEY, P. J. Distribuition of a population of Rhizobium leguminosarum bv trifolii among different size classes of soil aggregates. In: INTERNATIONAL CONGRESS ON NITROGEN FIXATION, 12., 1999, Foz do Iguacu. Nitrogen fixation: from molecules to crop productivity - proceedings. Dordrechet: Kluwer, 2000. p.555. (Current Plant Science and Biotechnology in Agriculture, v.38). Editado por Fabio O. Pedrosa, Mariangela Hungria, Geoffrey Yates, William E. Newton.| Biblioteca(s): Embrapa Cerrados. |
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| 16. | | PLOTEGHER, F.; MENDES, I. C.; HUNGRIA, M. Diversidade de rizóbios que nodulam o feijoeiro (Phaseolus vulgaris L.) em virgens solos dos cerrados. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 27.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 11.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 9.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 6., 2006, Bonito, MS. A busca das raízes: anais. Dourados: Embrapa Agropecuária Oeste, 2006. 1 CD-ROM. (Embrapa Agropecuária Oeste. Documentos, 82).| Biblioteca(s): Embrapa Soja. |
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| 18. | | MENDES, I. de C.; VARGAS, M. A.; HUNGRIA, M. Adubacao nitrogenada e inoculacao do feijoeiro em solos dos cerrados. In: REUNIAO BRAS. FERTILIDADE DO SOLO E NUTRICAO DE PLANTAS, 23.; REUNIAO BRASILEIRA SOBRE MICORRIZAS, 7.; SIMPOSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 5.; REUNIAO BRASILEIRA DE BIOLOGIA DO SOLO, 2., 1998, Caxambu, MG. FertBio 98: resumos. Caxambu: UFLA, 1998. p.202. Interrelacao fertilidade, biologia do solo e nutricao de plantas: consolidando um paradigma.| Biblioteca(s): Embrapa Cerrados. |
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| 19. | | MENDES, I. de C.; VARGAS, M. A. T.; HUNGRIA, M. Adubacao nitrogenada e inoculacao do feijoeiro em solos dos Cerrados. In: REUNIAO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRICAO DE PLANTAS, 23.; REUNIAO BRASILEIRA SOBRE MICORRIZAS, 7.; SIMPOSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 5.; REUNIAO BRASILEIRA DE BIOLOGIA DO SOLO, 2., 1998, Caxambu. FertBio 98: interrelacao fertilidade, biologia do solo e nutricao de plantas: consolidando um paradigma - resumos. Lavras: UFLA / SBCS / SBM, 1998. p.202.| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 403 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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