Abstract

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.

Keywords

Foliar fertilization; irrigation; phosphorus use efficiency; potato

Published in

Acta Agriculturae Scandinavica, Section B - Soil and Plant Science
2012, Volume: 62, number: 7, pages: 637-643
Publisher: TAYLOR & FRANCIS AS

SLU Authors

• Ekelöf, Joakim

  • Department of Biosystems and Technology, Swedish University of Agricultural Sciences
    

• Asp, Håkan

  • Horticulture, Swedish University of Agricultural Sciences
    

• Jensen, Erik Steen

  • Department of Biosystems and Technology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Horticulture
Agricultural Science


Publication identifier

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

Permanent link to this page (URI)

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