Contributions of labile and resistant organic materials to the immobilization of inorganic soil N when used in the restoration of abandoned agricultural fields

E. L. Tilston, T. Szili-Kovács, D. W. Hopkins

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We have examined the contributions sucrose and sawdust make to the net immobilization of inorganic soil N and assimilation of both C and N into microbial biomass when they are used as part of a restoration plan to promote the establishment of indigenous vegetation on abandoned agricultural fields on the Central Hungarian Plain. Both amendments led to net N immobilization. Sucrose addition also led to mobilization of N from the soil organic N pool and its immobilization into microbial biomass, whereas sawdust addition apparently immobilized soil N into a non-biomass compartment or a biomass component that was not detected by the conventional biomass N assay (CHCl3 fumigation and extraction). This suggests that the N was either cycled through the biomass, but not immobilized within it, or that it was immobilized in a protected biomass fraction different to the fraction into which N was immobilized in response to sucrose addition.

Original languageEnglish
Pages (from-to)168-174
Number of pages7
JournalSoil Use and Management
Volume25
Issue number2
DOIs
Publication statusPrint publication - Jun 2009
Externally publishedYes

Bibliographical note


Copyright 2009 Elsevier B.V., All rights reserved.

Keywords

  • Grassland restoration
  • Microbial biomass
  • Nitrogen availability
  • Priming
  • Sawdust
  • Sucrose

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