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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
28/09/1995 |
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Data da última atualização: |
07/04/2017 |
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Autoria: |
SPARLING, G. P.; WEST, A. W. |
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Título: |
Importance of soil water content when stimating soil microbial C, N and P by the fumigation-extraction methods. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Soil Biology Biochemistry, v.21, n.2, p.245-253, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
The influence of soil water content on the estimation of microbial C, N and P by the fumigation-extraction (FE) method and microbial C and N by the fumigation-incubation (FI) method was investigated using a range of air-dry soils. The estimates of microbial C were compared with those obtained by the substrate-induced respiration (SIR) method. Soils were fumigated overnight with CHCl3 when either air-dry, or rewetted to 50% w/w water content immediately before fumigation. The presence of water during fumigation greatly increased the C and N extracted by 0.5 m K2SO4, compared with soils fumigated while air-dry. Overnight rewetting of non-fumigated (control) soils decreased extractable-C but the effect on extractable-N was variable. Rewetting before fumigation also increased CO2-C production and net N-mineralization (during subsequent incubation) compared to soils fumigated while air dry. However, because of high variability the increases were often not significant. The flushes of extractable-C and N (the difference between fumigated and non-fumigated soils) were calculated in three ways. Comparison with the biomass C estimated on air-dry soils by the SIR method suggests the most appropriate way to estimate the flush is: flush = (extractable-C from wetted, fumigated soil) - (extractable-C from air-dry, non-fumigated soil). |
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Thesagro: |
Solo. |
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Thesaurus Nal: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01802naa a2200157 a 4500
001 1786368
005 2017-04-07
008 1989 bl --- 0-- u #d
100 1 $aSPARLING, G. P.
245 $aImportance of soil water content when stimating soil microbial C, N and P by the fumigation-extraction methods.
260 $c1989
520 $aThe influence of soil water content on the estimation of microbial C, N and P by the fumigation-extraction (FE) method and microbial C and N by the fumigation-incubation (FI) method was investigated using a range of air-dry soils. The estimates of microbial C were compared with those obtained by the substrate-induced respiration (SIR) method. Soils were fumigated overnight with CHCl3 when either air-dry, or rewetted to 50% w/w water content immediately before fumigation. The presence of water during fumigation greatly increased the C and N extracted by 0.5 m K2SO4, compared with soils fumigated while air-dry. Overnight rewetting of non-fumigated (control) soils decreased extractable-C but the effect on extractable-N was variable. Rewetting before fumigation also increased CO2-C production and net N-mineralization (during subsequent incubation) compared to soils fumigated while air dry. However, because of high variability the increases were often not significant. The flushes of extractable-C and N (the difference between fumigated and non-fumigated soils) were calculated in three ways. Comparison with the biomass C estimated on air-dry soils by the SIR method suggests the most appropriate way to estimate the flush is: flush = (extractable-C from wetted, fumigated soil) - (extractable-C from air-dry, non-fumigated soil).
650 $asoil
650 $aSolo
700 1 $aWEST, A. W.
773 $tSoil Biology Biochemistry$gv.21, n.2, p.245-253, 1989.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
26/05/2017 |
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Data da última atualização: |
04/02/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
OLIVEIRA, I. P. de; BELARMINO, L. C.; BELARMINO, A. J. |
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Afiliação: |
Ícaro Pedroso de Oliveira; LUIZ CLOVIS BELARMINO, CPACT; André Jacondino Belarmino. |
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Título: |
Viabilidade da produção de morango no sistema semi-hidropônico recirculante. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Custos e @gronegócio on line, v. 13, n. 1, Jan./Mar. 2017. |
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Páginas: |
p. 315-332 |
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Idioma: |
Português |
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Palavras-Chave: |
Agronegócio de frutas; Viabilidade de investimento. |
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Thesagro: |
Custo de Produção; Morango. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/160259/1/Luis-Clovis-Belarmino-OK-14-hidroponia.pdf
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Marc: |
LEADER 00609naa a2200193 a 4500
001 2070106
005 2020-02-04
008 2017 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, I. P. de
245 $aViabilidade da produção de morango no sistema semi-hidropônico recirculante.$h[electronic resource]
260 $c2017
300 $ap. 315-332
650 $aCusto de Produção
650 $aMorango
653 $aAgronegócio de frutas
653 $aViabilidade de investimento
700 1 $aBELARMINO, L. C.
700 1 $aBELARMINO, A. J.
773 $tCustos e @gronegócio on line$gv. 13, n. 1, Jan./Mar. 2017.
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