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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
03/12/2010 |
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Data da última atualização: |
03/08/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
KASCHUK, G.; ALBERTON, O.; HUNGRIA, M. |
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Afiliação: |
GLACIELA KASCHUK, CNPSo; ODAIR ALBERTON, CNPSo; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
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Título: |
Three decades of soil microbial biomass studies in Brazilian ecosystems: lessons learned about soil quality and indications for improving sustainability. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Soil Biology & Biochemistry, Oxford, v. 42, p. 1-13, 2010. |
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DOI: |
doi:10.1016/j.soilbio.2009.08.020 |
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Idioma: |
Português |
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Conteúdo: |
Soil microbial biomass plays important roles in nutrient cycling, plant?pathogen suppression, decomposition of residues and degradation of pollutants; therefore, it is often regarded as a good indicator of soil quality. We reviewed more than a hundred studies in which microbial biomass-C (MB-C), microbial quotient (MB-C/TSOC, total soil organic carbon) and metabolic quotient (qCO2) were evaluated with the objective of understanding MB-C responses to various soil-management practices in Brazilian ecosystems. These practices included tillage systems, crop rotations, pastures, organic farming, inputs of industrial residues and urban sewage sludge, applications of agrochemicals and burning. With a metaanalysis of 233 data points, we confirmed the benefits of no-tillage in preserving MB-C and reducing qCO2 in comparison to conventional tillage. A large number of studies described increases in MB-C and MB-C/TSOC due to permanent organic farming, also benefits from crop rotations particularly with several species involved, whereas application of agrochemicals and burning severely disturbed soil microbial communities. The MB-C decreased in overgrazed pastures, but increased in pastures rotated with wellmanaged crops. Responses of MB-C, MB-C/TSOC and qCO2 to amendment with organic industrial residues varied with residue type, dose applied and soil texture. In conclusion, MB-C and related parameters were, indeed, useful indicators of soil quality in various Brazilian ecosystems. However, direct relationships between MB-C and nutrient-cycling dynamics, microbial diversity and functionality are still unclear. Further studies are needed to develop strategies to maximize beneficial effects of microbial communities on soil fertility and crop productivity. MenosSoil microbial biomass plays important roles in nutrient cycling, plant?pathogen suppression, decomposition of residues and degradation of pollutants; therefore, it is often regarded as a good indicator of soil quality. We reviewed more than a hundred studies in which microbial biomass-C (MB-C), microbial quotient (MB-C/TSOC, total soil organic carbon) and metabolic quotient (qCO2) were evaluated with the objective of understanding MB-C responses to various soil-management practices in Brazilian ecosystems. These practices included tillage systems, crop rotations, pastures, organic farming, inputs of industrial residues and urban sewage sludge, applications of agrochemicals and burning. With a metaanalysis of 233 data points, we confirmed the benefits of no-tillage in preserving MB-C and reducing qCO2 in comparison to conventional tillage. A large number of studies described increases in MB-C and MB-C/TSOC due to permanent organic farming, also benefits from crop rotations particularly with several species involved, whereas application of agrochemicals and burning severely disturbed soil microbial communities. The MB-C decreased in overgrazed pastures, but increased in pastures rotated with wellmanaged crops. Responses of MB-C, MB-C/TSOC and qCO2 to amendment with organic industrial residues varied with residue type, dose applied and soil texture. In conclusion, MB-C and related parameters were, indeed, useful indicators of soil quality in various Brazilian ecosystems. Howev... Mostrar Tudo |
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Thesagro: |
Biomassa; Microbiologia do solo. |
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Thesaurus Nal: |
Microbial biomass; Soil microorganisms; Soil quality. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 02477naa a2200217 a 4500
001 1868639
005 2017-08-03
008 2010 bl uuuu u00u1 u #d
024 7 $adoi:10.1016/j.soilbio.2009.08.020$2DOI
100 1 $aKASCHUK, G.
245 $aThree decades of soil microbial biomass studies in Brazilian ecosystems$blessons learned about soil quality and indications for improving sustainability.
260 $c2010
520 $aSoil microbial biomass plays important roles in nutrient cycling, plant?pathogen suppression, decomposition of residues and degradation of pollutants; therefore, it is often regarded as a good indicator of soil quality. We reviewed more than a hundred studies in which microbial biomass-C (MB-C), microbial quotient (MB-C/TSOC, total soil organic carbon) and metabolic quotient (qCO2) were evaluated with the objective of understanding MB-C responses to various soil-management practices in Brazilian ecosystems. These practices included tillage systems, crop rotations, pastures, organic farming, inputs of industrial residues and urban sewage sludge, applications of agrochemicals and burning. With a metaanalysis of 233 data points, we confirmed the benefits of no-tillage in preserving MB-C and reducing qCO2 in comparison to conventional tillage. A large number of studies described increases in MB-C and MB-C/TSOC due to permanent organic farming, also benefits from crop rotations particularly with several species involved, whereas application of agrochemicals and burning severely disturbed soil microbial communities. The MB-C decreased in overgrazed pastures, but increased in pastures rotated with wellmanaged crops. Responses of MB-C, MB-C/TSOC and qCO2 to amendment with organic industrial residues varied with residue type, dose applied and soil texture. In conclusion, MB-C and related parameters were, indeed, useful indicators of soil quality in various Brazilian ecosystems. However, direct relationships between MB-C and nutrient-cycling dynamics, microbial diversity and functionality are still unclear. Further studies are needed to develop strategies to maximize beneficial effects of microbial communities on soil fertility and crop productivity.
650 $aMicrobial biomass
650 $aSoil microorganisms
650 $aSoil quality
650 $aBiomassa
650 $aMicrobiologia do solo
700 1 $aALBERTON, O.
700 1 $aHUNGRIA, M.
773 $tSoil Biology & Biochemistry, Oxford$gv. 42, p. 1-13, 2010.
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Registro original: |
Embrapa Soja (CNPSO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
03/11/2003 |
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Data da última atualização: |
17/10/2017 |
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Autoria: |
TRUGILHO, P. F.; MENDES, L. M.; SILVA, J. R. M. da; LIMA, J. T. |
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Título: |
Influência da idade nas características físicas, químicas e anatômicas da madeira de Eucalyptus grandis. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: IUFRO CONFERENCE ON SILVICULTURE AND IMPROVEMENT EUCALYPTS=CONFERÊNCIA IUFRO SOBRE SILVICULTURA E MELHORAMENTO DE EUCALIPTOS, 1997, Salvador. Proceedings...=Anais... Colombo: EMBRAPA-CNPF, 1997. v. 3, p. 269-275. |
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Idioma: |
Português |
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Thesagro: |
Eucalyptus Grandis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00664naa a2200157 a 4500
001 1307450
005 2017-10-17
008 1997 bl uuuu u00u1 u #d
100 1 $aTRUGILHO, P. F.
245 $aInfluência da idade nas características físicas, químicas e anatômicas da madeira de Eucalyptus grandis.
260 $c1997
650 $aEucalyptus Grandis
700 1 $aMENDES, L. M.
700 1 $aSILVA, J. R. M. da
700 1 $aLIMA, J. T.
773 $tIn: IUFRO CONFERENCE ON SILVICULTURE AND IMPROVEMENT EUCALYPTS=CONFERÊNCIA IUFRO SOBRE SILVICULTURA E MELHORAMENTO DE EUCALIPTOS, 1997, Salvador. Proceedings...=Anais... Colombo: EMBRAPA-CNPF, 1997.$gv. 3, p. 269-275.
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