Availability of Phosphorus in Cow Slurry using Isotopic Labelling Technique

Pichit Pongsakul, F. Bertelsen, Gunnar Gissel Nielsen

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    Abstract

    A pot experiment was conducted to evaluate the influence of cow slurry on P uptake by corn and to estimate the readily available P in the slurry by using an isotopic labelling technique. Water-soluble P in soil was increased and isotopic
    equilibrium of available P was attained after labelled slurry was mixed thoroughly throughout the soil. Labelled slurry applied at planting increased the P uptake by corn, whereas the same amount applied one week before harvest did not affect the P uptake. It was estimated that 46-54% of the total P uptake in plants is derived from the slurry. The readily available P (the L-value) in the slurry was at least 26 mg/kg which equals 3.7% of the total P.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherRisø National Laboratory
    Number of pages18
    ISBN (Print)87-550-1390-2
    Publication statusPublished - 1988
    SeriesDenmark. Forskningscenter Risoe. Risoe-R
    Number557
    ISSN0106-2840

    Keywords

    • Risø-R-557
    • Risø-R-557(EN)

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