Biology and Fertility of Soils

, Volume 44, Issue 6, pp 805–813

In situ ion exchange resin membrane (IEM) technique to measure soil mineral nitrogen dynamics in grazed pastures

  • Saman Bowatte
  • Russell Tillman
  • Andrew Carran
  • Allan Gillingham
  • David Scotter
Original Paper

DOI: 10.1007/s00374-007-0260-4

Cite this article as:
Bowatte, S., Tillman, R., Carran, A. et al. Biol Fertil Soils (2008) 44: 805. doi:10.1007/s00374-007-0260-4

Abstract

This paper explored the potential of application of in situ ion exchange resin membrane (IEM) technique for assessing soil nitrogen (N) availability and spatial distribution in New Zealand grazed pastures. Field and incubation experiments conducted to test the technique proved IEM technique to be a useful approach to monitoring the continuous changes in soil mineral N in pasture soils. The field testing showed that the IEM technique reflects both differences in pool size and mineral N flux, while 2-M KCl extraction reflects only pool size at the sampling. Testing the effects of residence time, temperature, soil inorganic N content, and soil water content through diffusion modeling offers further support for using IEM to explore the complex dynamics of nitrogen availability in pasture soils.

Keywords

Soil nitrogen Grazed pasture Ion exchange resin membranes 

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Saman Bowatte
    • 1
    • 2
  • Russell Tillman
    • 1
  • Andrew Carran
    • 2
  • Allan Gillingham
    • 2
  • David Scotter
    • 1
  1. 1.Institute of Natural ResourcesMassey UniversityPalmerston NorthNew Zealand
  2. 2.AgResearch (Grasslands)Palmerston NorthNew Zealand

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