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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
27/06/1995 |
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Autoria: |
DORNELAS, M. C.; VIEIRA, M. L. C.; SOUZA JUNIOR, C. L. DE. |
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Título: |
Fonte e idade de explante, radiacao lumnosa e combinacoes de NAA e BAP na inducao de calos em Stylosanthes scabra vog. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Pesq. Agropec. Bras., v.26, n.11, p.1901-1909, 1991. |
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Idioma: |
Português |
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Thesagro: |
Cultura de Tecido; Fisiologia; Leguminosa; Stylosanthes Scabra. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00575naa a2200181 a 4500
001 1616077
005 1995-06-27
008 1991 bl uuuu u00u1 u #d
100 1 $aDORNELAS, M. C.
245 $aFonte e idade de explante, radiacao lumnosa e combinacoes de NAA e BAP na inducao de calos em Stylosanthes scabra vog.
260 $c1991
650 $aCultura de Tecido
650 $aFisiologia
650 $aLeguminosa
650 $aStylosanthes Scabra
700 1 $aVIEIRA, M. L. C.
700 1 $aSOUZA JUNIOR, C. L. DE
773 $tPesq. Agropec. Bras.$gv.26, n.11, p.1901-1909, 1991.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
07/06/2006 |
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Data da última atualização: |
23/10/2009 |
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Autoria: |
MENDES, I. de C.; REIS JUNIOR, F. B. dos. |
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Título: |
Uso de parâmetros microbiológicos como indicadores para avaliar a qualidade do solo e a sustentabilidade dos agroecossistemas. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2004. |
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Páginas: |
34 p. |
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Série: |
(Embrapa Cerrados. Documentos, 112). |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT: Every factor that has a negative impact on soil microorganisms sooner or later will reflect in a deterioration of soil chemical and physical properties specially, those related to soil organic matter losses. This paper was based on a talk presented at "The International Symposium of Indicators of Soil Quality" held on Marco Juarez-Argentina. Some of the aspects related to the concept of soil quality and biological indicators of soil quality, were reviewed. Results of the studies related to the characterization of soil microbial biomass, respiration and enzymes activities on different agroecosystems of the Cerrado region also are presented. Soil microbial biomass, microbial respiration, and the activities of soil enzymes (acid phosphatase, glucosidase and arilsufatase) have been evaluated at Embrapa Cerrados, since 1998. The objective of these studies is to determine the impact of different agricultural management systems (conventional tillage and no-tillage) on soil functioning and to evaluate the possibility of using these parameters as biological indicators of soil quality. Soil samples were collected at the 0 to 5 cm abd 5 to 20 cm depths, during the dry (August) and the rainy (January) seasons. In relation to a native Cerrado, located near the experiments, significant reductions in microbial biomass and phosphatase activity were observed in the agricultural areas. At the 0 to 5 cm depth, the no-tillage (NT) system presented higher levels of phosphatase, arilsufatase and glucosidase activities as compared to the conventional tillage (CT). These effects were related to the lack of soil mechanical preparation, fertilizers' placement, and to the accumulation of crop residues at the soil surface. MenosABSTRACT: Every factor that has a negative impact on soil microorganisms sooner or later will reflect in a deterioration of soil chemical and physical properties specially, those related to soil organic matter losses. This paper was based on a talk presented at "The International Symposium of Indicators of Soil Quality" held on Marco Juarez-Argentina. Some of the aspects related to the concept of soil quality and biological indicators of soil quality, were reviewed. Results of the studies related to the characterization of soil microbial biomass, respiration and enzymes activities on different agroecosystems of the Cerrado region also are presented. Soil microbial biomass, microbial respiration, and the activities of soil enzymes (acid phosphatase, glucosidase and arilsufatase) have been evaluated at Embrapa Cerrados, since 1998. The objective of these studies is to determine the impact of different agricultural management systems (conventional tillage and no-tillage) on soil functioning and to evaluate the possibility of using these parameters as biological indicators of soil quality. Soil samples were collected at the 0 to 5 cm abd 5 to 20 cm depths, during the dry (August) and the rainy (January) seasons. In relation to a native Cerrado, located near the experiments, significant reductions in microbial biomass and phosphatase activity were observed in the agricultural areas. At the 0 to 5 cm depth, the no-tillage (NT) system presented higher levels of phosphatase, arilsuf... Mostrar Tudo |
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Palavras-Chave: |
Biiomassa; Enzymic activity; Microbial flora. |
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Thesagro: |
Análise do Solo; Atividade Enzimática; Bioquímica do Solo; Cerrado; Microbiologia do Solo; População Microbiana. |
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Thesaurus NAL: |
biochemistry; biomass; microbiology; soil. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/27014/1/doc_112.pdf
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Marc: |
LEADER 02622nam a2200301 a 4500
001 1569604
005 2009-10-23
008 2004 bl uuuu u0uu1 u #d
100 1 $aMENDES, I. de C.
245 $aUso de parâmetros microbiológicos como indicadores para avaliar a qualidade do solo e a sustentabilidade dos agroecossistemas.
260 $aPlanaltina, DF: Embrapa Cerrados$c2004
300 $a34 p.
490 $a(Embrapa Cerrados. Documentos, 112).
520 $aABSTRACT: Every factor that has a negative impact on soil microorganisms sooner or later will reflect in a deterioration of soil chemical and physical properties specially, those related to soil organic matter losses. This paper was based on a talk presented at "The International Symposium of Indicators of Soil Quality" held on Marco Juarez-Argentina. Some of the aspects related to the concept of soil quality and biological indicators of soil quality, were reviewed. Results of the studies related to the characterization of soil microbial biomass, respiration and enzymes activities on different agroecosystems of the Cerrado region also are presented. Soil microbial biomass, microbial respiration, and the activities of soil enzymes (acid phosphatase, glucosidase and arilsufatase) have been evaluated at Embrapa Cerrados, since 1998. The objective of these studies is to determine the impact of different agricultural management systems (conventional tillage and no-tillage) on soil functioning and to evaluate the possibility of using these parameters as biological indicators of soil quality. Soil samples were collected at the 0 to 5 cm abd 5 to 20 cm depths, during the dry (August) and the rainy (January) seasons. In relation to a native Cerrado, located near the experiments, significant reductions in microbial biomass and phosphatase activity were observed in the agricultural areas. At the 0 to 5 cm depth, the no-tillage (NT) system presented higher levels of phosphatase, arilsufatase and glucosidase activities as compared to the conventional tillage (CT). These effects were related to the lack of soil mechanical preparation, fertilizers' placement, and to the accumulation of crop residues at the soil surface.
650 $abiochemistry
650 $abiomass
650 $amicrobiology
650 $asoil
650 $aAnálise do Solo
650 $aAtividade Enzimática
650 $aBioquímica do Solo
650 $aCerrado
650 $aMicrobiologia do Solo
650 $aPopulação Microbiana
653 $aBiiomassa
653 $aEnzymic activity
653 $aMicrobial flora
700 1 $aREIS JUNIOR, F. B. dos
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Embrapa Cerrados (CPAC) |
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