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 (1997-2023). 2.
https://uknowledge.uky.edu/igc/1997/session20/2
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
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.
