Abstract
Summary The use of pulverized refuse fines (PRF), the residual fine screenings from refuse-derived fuel plant, for tree growth was assessed in two pot trials, one in a glasshouse and the other under field conditions. In the glasshouse experiment, sycamore (Acer pseudoplat anus L.) seedlings were grown on PRF- or Growtree compost-amended sand, with or without additional fertilizer, for 17 months. Both treatment and fertilizer had significant effects on tree height and stem diameter. The response of seedlings to added fertilizer was greatest in pure sand, which is attributed to both organic and inorganic amendments to the growing medium. Fertilized compost-amended sand gave the highest shoot extension. However, among treatments without supplemented fertilizer, shoot extension was greatest in PRF-amended sand and pure PRF, and there were signs of nutrient depletion in unfertilized compost-amended sand. Stem diameter and leaf area responses presented a similar picture. Dry matter production of shoot and root ...
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