Perspectives on peak liquid manure temperature with implications for methane emissions

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DOI

https://10.1002/jeq2.20483

Language of the publication
English
Date
2023-04-26
Type
Article
Author(s)
  • Hung, Chih-Yu
  • Koc, Efe Kamal
  • Grant, Brian
  • Smith, Ward
  • Vander Zaag, Andrew
Publisher
American Society of Agronomy, Crop Science Society of America, Soil Science Society of America / Wiley Periodicals LLC

Abstract

Methane emissions from liquid manure storage are currently estimated with a methane conversion factor (MCF) based on manure temperature inputs or air temperatures as a substitute in the 2019 IPCC Tier 2 method. However, differences between peak manure temperature and peak air temperature (Tdiff) in warm seasons are likely to occur and result in poor estimates of MCF and methane emissions. To address this concern, this study aims to investigate the relationship between the Tdiff and ratio of manure surface area to manure volume (Rs:v) using a mechanistic model and by analyzing farm-scale measurement studies across Canada. Positive correlations between Tdiff and Rs:v were found using a modeling approach and from farm-scale results (r = 0.55, p = 0.06). Tdiff ranged from –2.2 to 2.6°C in farm-scale results mainly collected from eastern Canada. We suggest that manure volume and surface area, in addition to removal frequency, could be used to estimate Tdiff and be part of the criteria for improving manure temperature estimates, which could lead to improved estimates of MCF.

Subject

  • Agriculture

Keywords

  • manure,
  • methane emission

Rights

Pagination

939-947

Peer review

Yes

Identifiers

ISSN
1537-2537
0047-2425

Article

Journal title
Journal of Environmental Quality
Journal volume
52
Accepted date
2023-04-13
Submitted date
2022-11-08

Citation(s)

Hung, C-Y., Koc, E. K., Grant, B., Smith, W., & Vander Zaag, A. (2023). Perspectives on peak liquid manure temperature with implications for methane emissions. Journal of Environmental Quality, 52, 939-947. https://10.1002/jeq2.20483

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Collection(s)

Climate and weather

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