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Forskningsartikel2012Vetenskapligt granskad

Potato yield response to foliar application of phosphorus as affected by soil moisture and available soil phosphorus

Ekelöf, Joakim; Asp, Håkan; Jensen, Erik Steen

Sammanfattning

Foliar application of phosphorus (P) may be a supplementary treatment to sustain adequate P-status of potato (Solanum tuberosum L.). However, the prediction of the potential benefits of foliar P supply is difficult, since several factors, such as weather conditions and plant P-status influence the effects. We determined the impact of soil moisture and soil P-supply on the responsiveness to foliar P-application under controlled environmental conditions. Plant dry matter yields, P-accumulation and phosphorus use efficiency (PUE) with or without foliar application were determined at five soil P-levels in combination with two soil moisture levels. The results suggest that water status is of importance for the responsiveness to foliar P-application and may be related to diffusion of P through the leaf cells, which require a good water status. The PUE was significantly improved with irrigation while adding P to the soil decreased the PUE.

Nyckelord

Foliar fertilization; irrigation; phosphorus use efficiency; potato

Publicerad i

Acta Agriculturae Scandinavica, Section B - Soil and Plant Science
2012, Volym: 62, nummer: 7, sidor: 637-643
Utgivare: TAYLOR & FRANCIS AS

      SLU författare

      • Asp, Håkan

        • Hortikultur, Sveriges lantbruksuniversitet
      • UKÄ forskningsämne

        Trädgårdsvetenskap/hortikultur
        Jordbruksvetenskap

        Publikationens identifierare

        DOI: https://doi.org/10.1080/09064710.2012.684886

        Permanent länk till denna sida (URI)

        https://res.slu.se/id/publ/40523