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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
17/01/1997 |
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Data da última atualização: |
11/09/2019 |
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Autoria: |
ALVAREZ, R.; SANTANATOGLIA, O. J.; DANIEL, P. E.; GARCIA, R. |
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Afiliação: |
Roberto Alvarez, Universidad de Buenos Aires/Faculdad de Agronomoia/Laboratorio de Radioisótopos; Oscar José Santanatoglia, Universidad de Buenos Aires/Faculdad de Agronomoia/Laboratorio de Radioisótopos; Peter Engelbert Daniel, Universidad de Buenos Aires/Laboratorio de Radioisótopos; Roberto García, Instituto Nacional de Tecnología Agropecuaria - INTA/Estación Experimental de Pergamino. |
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Título: |
Respiration and specific activity of soil microbial biomass under conventional and recuced tillage. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 30, n. 5, p. 701-709, maio 1995. |
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Idioma: |
Inglês |
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Notas: |
Título em português: Repiração e atividade específica da biomassa microbiana de um solo sob lavra convencional e reduzida. |
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Conteúdo: |
The effects of two tillage systems, conventional (mold board plow) and reduced (harrow disk), on soil organic carbon and microbial biomass and activity were evaluated. Total organic carbon and microbial biomass were not affected by tillage, whereas carbon in the soil light fraction was higher in depth in plowed plots. Respiration os incubated samples and the specific ativity of the microbial biomass were also higher in subsurface soil under conventional tillage. This was associated (r=0,80) with carbon availability as indicated by the ratio light fraction-C/biomass-C. the CO2-C produced by the soil was originated from both a labile and a resistant pool. Conventional tillage determined an increase of the labile one. The CO2-C production in hte field was positively correlated with soil temperature and rainfall (r2=78-89). During summer, plowed plots generated 44% more CO2-C than umplowed ones. Plowing increased the available carbon pool size for microorganisms in depth but had no effect on CO2-C emission to the atmosphere on a year basis. |
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Palavras-Chave: |
Amostras incubadas; Carbono organico; Harrow disk; Incubated samples; Organic carbon; Plow. |
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Thesagro: |
Arado; Grade de Disco; Matéria Orgânica. |
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Thesaurus Nal: |
organic matter. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/19432/1/pab16_maio_95.pdf
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Marc: |
LEADER 01997naa a2200289 a 4500
001 1104233
005 2019-09-11
008 1995 bl uuuu u00u1 u #d
100 1 $aALVAREZ, R.
245 $aRespiration and specific activity of soil microbial biomass under conventional and recuced tillage.
260 $c1995
500 $aTítulo em português: Repiração e atividade específica da biomassa microbiana de um solo sob lavra convencional e reduzida.
520 $aThe effects of two tillage systems, conventional (mold board plow) and reduced (harrow disk), on soil organic carbon and microbial biomass and activity were evaluated. Total organic carbon and microbial biomass were not affected by tillage, whereas carbon in the soil light fraction was higher in depth in plowed plots. Respiration os incubated samples and the specific ativity of the microbial biomass were also higher in subsurface soil under conventional tillage. This was associated (r=0,80) with carbon availability as indicated by the ratio light fraction-C/biomass-C. the CO2-C produced by the soil was originated from both a labile and a resistant pool. Conventional tillage determined an increase of the labile one. The CO2-C production in hte field was positively correlated with soil temperature and rainfall (r2=78-89). During summer, plowed plots generated 44% more CO2-C than umplowed ones. Plowing increased the available carbon pool size for microorganisms in depth but had no effect on CO2-C emission to the atmosphere on a year basis.
650 $aorganic matter
650 $aArado
650 $aGrade de Disco
650 $aMatéria Orgânica
653 $aAmostras incubadas
653 $aCarbono organico
653 $aHarrow disk
653 $aIncubated samples
653 $aOrganic carbon
653 $aPlow
700 1 $aSANTANATOGLIA, O. J.
700 1 $aDANIEL, P. E.
700 1 $aGARCIA, R.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 30, n. 5, p. 701-709, maio 1995.
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