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

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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.

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Authors and Affiliations

  1. Institute of Natural Resources, Massey University, Private Bag 11222, Palmerston North, New Zealand

    Saman Bowatte, Russell Tillman & David Scotter

  2. AgResearch (Grasslands), Tennant Drive, Private Bag 11008, Palmerston North, New Zealand

    Saman Bowatte, Andrew Carran & Allan Gillingham

Authors
  1. Saman Bowatte
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  2. Russell Tillman
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  3. Andrew Carran
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  4. Allan Gillingham
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  5. David Scotter
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Correspondence to Saman Bowatte.

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Bowatte, S., Tillman, R., Carran, A. et al. In situ ion exchange resin membrane (IEM) technique to measure soil mineral nitrogen dynamics in grazed pastures. Biol Fertil Soils 44, 805–813 (2008). https://doi.org/10.1007/s00374-007-0260-4

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  • DOI: https://doi.org/10.1007/s00374-007-0260-4

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