Data/hora: 18/06/2024 21:31:36

Biblioteca(s): | Embrapa Agrobiologia; Embrapa Pantanal.
Data corrente: | 27/06/1995
Data da última atualização: | 07/04/2017
Autoria: | SPARLING, G. P.; WEST, A. W.; WHALE, K. N.
Título: | Interference from plant roots on the estimation of soil microbial ATP, C, N and P.
Ano de publicação: | 1985
Fonte/Imprenta: | Soil Biology Biochemistry, v.17, n.3, p.275-278, 1985.
Idioma: | Inglês
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.
Thesagro: | Solo.
Thesaurus Nal: | soil.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)

Exemplares:

CNPAB - (21632-1) - ADC - SP - -- -  -  - 19499 - DIS
CPAP - (29930-1) - ADD - SP - PP - SP14640 -  - 14640 - DIS