Evaluation of phosphorus management practices in East Mediterranean altered wetland soils

I. Barnea, M. I. Litaor*, M. Shenker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

In this study, we re-examined the common practice of intensive P fertilization in altered wetland soils even when soil test (Olsen-P) indicates sufficient P levels (>10mg/kg). We tested the effects of P fertilization on crop performance and P leaching in 36 lysimeters (1.5m 3) filled with peat, marl or alluvial materials and compared a new bone-char-based fertilizer to the common superphosphate. The lysimeter experiment consisted of the two fertilizer types, two application rates and a typical crop rotation of setaria (Setaria italica), pea (Pisum sativum) and tomatoes (Lycopersicon esculentum). By the end of each crop rotation, the yield was evaluated relative to P-fertilization rates and soil-test P. P fertilization resulted in increased Olsen-P, soil-solution P and P loss through leachates and a slight quality yield advantage in pea and tomato with no increase in yield of any crop. P budget calculations showed that plant uptake was not affected by the amount or type of applied P. We concluded that P fertilizer application should be significantly reduced because of limited crop response and increased P concentrations in leachates that may increase P loss to waterways especially in the marl soils. The ABC Protector exhibited slow P release, but its environmental implications should be further studied.

Original languageAmerican English
Pages (from-to)35-44
Number of pages10
JournalSoil Use and Management
Volume28
Issue number1
DOIs
StatePublished - Mar 2012

Keywords

  • ABC Protector
  • Bioavailable phosphorus
  • Olsen-P

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