Repeated annual use of the nitrification inhibitor dicyandiamide (DCD) does not alter its effectiveness in reducing N2O emissions from cow urine

Urine deposited by grazing animals in patches is the single largest source of N2O emissions in New Zealand. In recent years, a nitrification inhibitor, dicyandiamide (DCD) has been developed that substantially reduces these emissions. However, uncertainty exists about the sustained effectiveness of...

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Bibliographic Details
Published in:Animal feed science and technology 2011-06, Vol.166-167, p.480-491
Main Authors: de Klein, C.A.M., Cameron, K.C., Di, H.J., Rys, G., Monaghan, R.M., Sherlock, R.R.
Format: Article
Language:English
Subjects:
Animal productions
Biological and medical sciences
cows
Dairy cow urine
Dicyandiamide
EF3
Emission factor
emissions
Feed and pet food industries
Food industries
Fundamental and applied biological sciences. Psychology
Greenhouse gas
nitrification
nitrous oxide
Terrestrial animal productions
uncertainty
urine
Vertebrates
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Summary:Urine deposited by grazing animals in patches is the single largest source of N2O emissions in New Zealand. In recent years, a nitrification inhibitor, dicyandiamide (DCD) has been developed that substantially reduces these emissions. However, uncertainty exists about the sustained effectiveness of repeated use of DCD on reducing N2O emissions from urine patches. The aim of this study was to determine if DCD application for 4 or 5 consecutive yr alters its effectiveness to reduce N2O emissions from cow urine patches (EF3). A second objective was to summarise results of New Zealand studies published in the last decade on effects of DCD to reduce N2O emissions from animal urine. At ‘repeated-DCD-use’ sites and ‘non-DCD’ sites in Canterbury and Southland (New Zealand), N2O emissions were measured for 6mo from three treatments being: Control, Control+DCD, Urine and Urine+DCD. At the Canterbury site, DCD application reduced (P
ISSN:0377-8401
1873-2216
DOI:10.1016/j.anifeedsci.2011.04.076