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Plant and Soil

, Volume 107, Issue 1, pp 113–121 | Cite as

Modelling nutrient mobilisation in intensively mixed peaty heathland soil

  • S. M. Ross
  • D. C. Malcolm
Article

Abstract

Laboratory incubations were used to investigate the influence of soil mixing intensity and waterlogged conditions on nutrient mobilisation from models of cultivated heathland soil. Fragmentation of the peaty surface horizon after different soil cultivation intensities was simulated using four different surface areas of peat organic matter. In well aerated conditions, increased mobilisation of C, NH 4 + −N, PO 4 3− , K+, Ca2+ and Mg2+ was observed with increased mixing intensity and increased surface area of peat. For all nutrients apart from calcium, intensively mixed treatments showed higher mobilisation rates under waterlogging than under well aerated conditions. This was particularly clear for NH 4 −N and PO 4 3− mobilisation. Simple linear regression analysis showed that, under aerated conditions, for four mixing intensities, rates of mobilisation of NH 4 + −N, PO 4 3− , K+, Ca2+ and Mg2+ were approximately constant per unit of peat surface area exposed during soil mixing. Waterlogging was more important than soil mixing intensity in determining nitrogen mobilisation rates in saturated soil.

Key words

incubation leaching nutrient mobilisation soil mixing waterlogging peat soil 

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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • S. M. Ross
    • 1
    • 2
  • D. C. Malcolm
    • 1
    • 2
  1. 1.Department of GeographyUniversity of BristolUK
  2. 2.Department of Forestry and Natural ResourcesUniversity of EdinburghEdinburghUK

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