Publication Date
1997
Description
Measurements of N2O and N2 efflux were made following surface or injected application of slurry to a wet, fine-textured pasture soil. Intact blocks of the slurry applied soil were incubated in a laboratory system that permitted replacement of the original N2 in soil atmosphere with He, and thus the detection and estimation of N2 arising from denitrification. Following application at a rate equivalent to 112 kg N ha-1, 7.2 and 13.4 kg N ha-1 were lost from surface applied and injected slurry, respectively, during a 40 d period at 15 oC. Peak efflux of N2O occurred after about 20 d from both the surface applied and injected slurry, and was 0.4 and 0.8 kg N ha-1 d-1, respectively. The efflux of N2 was undetectable (< 20 g N ha-1 d-1), except during the first few days, and the overall N2O/N2 was 1.72 for both treatments.
Citation
Scholefield, D; Chadwick, D; and Hawkins, J.M B., "Use of Novel Incubation Technique to Measure N2 on 0/N2 Following Surface or Injected Application of Slurry" (2024). IGC Proceedings (1989-2023). 2.
https://uknowledge.uky.edu/igc/1997/session20/2
Included in
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Use of Novel Incubation Technique to Measure N2 on 0/N2 Following Surface or Injected Application of Slurry
Measurements of N2O and N2 efflux were made following surface or injected application of slurry to a wet, fine-textured pasture soil. Intact blocks of the slurry applied soil were incubated in a laboratory system that permitted replacement of the original N2 in soil atmosphere with He, and thus the detection and estimation of N2 arising from denitrification. Following application at a rate equivalent to 112 kg N ha-1, 7.2 and 13.4 kg N ha-1 were lost from surface applied and injected slurry, respectively, during a 40 d period at 15 oC. Peak efflux of N2O occurred after about 20 d from both the surface applied and injected slurry, and was 0.4 and 0.8 kg N ha-1 d-1, respectively. The efflux of N2 was undetectable (< 20 g N ha-1 d-1), except during the first few days, and the overall N2O/N2 was 1.72 for both treatments.
