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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Pantanal. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
07/04/2017 |
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Autoria: |
SPARLING, G. P.; WEST, A. W.; WHALE, K. N. |
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Título: |
Interference from plant roots on the estimation of soil microbial ATP, C, N and P. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
Soil Biology Biochemistry, v.17, n.3, p.275-278, 1985. |
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Idioma: |
Inglês |
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Conteúdo: |
Excised solution-grown roots of maize or ryegrass added to two pasture soils at the rate of 6.0 mg g-1 and 13.8 mg g-1, respectively, ,increased the flush (fumigated mkinus control values) of CO2-C by up to 1.89-fold, KCl extractable N by up to 1.88-fold and NaHCO, extractable P by 3.28-fold. The ATP content of the soil was increased by up to 1.42-fold. Because of high variability the effects of the roots on the C and N flueshes was not significant at P<0.05. Incubation of the root-amemnded soils for 7 days at 25 C prior to fumigation much decreased the contribution from the roots to the C and N flush and to the ATP content. There was, however, still a large significant effect of the roots on the P-flush, this being up to 3 times greater than the equivalent soil without roots. In soil samples with a high viable root density (>6 mg g) such as may occur in dense pastures, greenhouse pot experiment or rhizosphere soil samples, it is recommended that they be incubated for 7 days prior to fumigation and analysis. Whitout such prior incubation there is the risk that root material may be included in the microbial biomass estimation. |
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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 01608naa a2200169 a 4500
001 1786369
005 2017-04-07
008 1985 bl --- 0-- u #d
100 1 $aSPARLING, G. P.
245 $aInterference from plant roots on the estimation of soil microbial ATP, C, N and P.
260 $c1985
520 $aExcised solution-grown roots of maize or ryegrass added to two pasture soils at the rate of 6.0 mg g-1 and 13.8 mg g-1, respectively, ,increased the flush (fumigated mkinus control values) of CO2-C by up to 1.89-fold, KCl extractable N by up to 1.88-fold and NaHCO, extractable P by 3.28-fold. The ATP content of the soil was increased by up to 1.42-fold. Because of high variability the effects of the roots on the C and N flueshes was not significant at P<0.05. Incubation of the root-amemnded soils for 7 days at 25 C prior to fumigation much decreased the contribution from the roots to the C and N flush and to the ATP content. There was, however, still a large significant effect of the roots on the P-flush, this being up to 3 times greater than the equivalent soil without roots. In soil samples with a high viable root density (>6 mg g) such as may occur in dense pastures, greenhouse pot experiment or rhizosphere soil samples, it is recommended that they be incubated for 7 days prior to fumigation and analysis. Whitout such prior incubation there is the risk that root material may be included in the microbial biomass estimation.
650 $asoil
650 $aSolo
700 1 $aWEST, A. W.
700 1 $aWHALE, K. N.
773 $tSoil Biology Biochemistry$gv.17, n.3, p.275-278, 1985.
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Registro original: |
Embrapa Pantanal (CPAP) |
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