Pulse Brain · Growing Health Evidence Index
Peer-reviewed

Meta-analysis of New Zealand's nitrous oxide emission factors for ruminant excreta supports disaggregation based on excreta form, livestock type and slope class

Tony J. van der Weerden, Alasdair Noble, Jiafa Luo, Cecile A. M. de Klein, Surinder Saggar, Donna Giltrap, Jim Gibbs, G. Rys

The Science of The Total Environment · 2020

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Summary

Globally, animal excreta (dung and urine) deposition onto grazed pastures represents more than half of anthropogenic nitrous oxide (N<sub>2</sub>O) emissions. To account for these emissions, New Zealand currently employs urine and dung emission factor (EF<sub>3</sub>) values of 1.0% and 0.25%, respectively, for all livestock. These values are primarily based on field studies conducted on fertile, flatland pastures predominantly used for dairy cattle production but do not consider emissions from hill land pastures primarily used for sheep, deer and non-dairy cattle. The objective of this study was to determine the most suitable urine and dung EF<sub>3</sub> values for dairy cattle, non-dairy cattle, and sheep grazing pastures on different slopes based on a meta-analysis of New Zealand EF<su

Source type
Peer-reviewed study
DOI
10.1016/j.scitotenv.2020.139235
Catalogue ID
SNmohktx3d-b3r8xh
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