Nitrous oxide emissions after application of inorganic fertilizer and incorporation of green manure residues

J. Sarkodie-Addo, H. C. Lee, E. M. Baggs*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Emissions of N2O were measured after application of NH 4NO3 fertilizer and incorporation of winter wheat and rye green manures in two field experiments in southeast England. Incorporation of green manure alone resulted in temporary immobilization of soil N, small N 2O emissions and also low availability of N for the following crop. Emissions were increased after application of inorganic fertilizer, and were further increased from integrated management treatments whereby green manure residues were incorporated after fertilizer application. The highest emission was from the incorporated winter wheat green manure plus fertilizer treatment, with 1.5 kg N2O-N ha-1 (0.6% of N applied) being emitted over the first 55 days after incorporation. This high emission was attributed to the supply of C in the residues providing the energy for denitrification in the presence of large amounts of mineral N and the creation of anaerobic microsites during microbial respiration.

Original languageEnglish
Pages (from-to)331-339
Number of pages9
JournalSoil Use and Management
Volume19
Issue number4
DOIs
Publication statusPublished - 1 Dec 2003

Keywords

  • Crop residues
  • Green manure
  • Incorporation
  • Nitrous oxide
  • Soil mineral N

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