DataMan: A global dataset of nitrous oxide and ammonia emission factors for excreta deposited by livestock and land-applied manure

Authors: BELTRAN, IGNACIO - Inia Remehue - Osorno; VAN DER WEERDEN, TONY - Ag Research Limited; ALFARO, MARTA - Inia Remehue - Osorno; AMON, BARBARA - Leibniz Institute; DE KLEIN, CECILE - Ag Research Limited; GRACE, PETER - Queensland University Of Technology; HAFNER, SASHA - Aarhus University; HASSOUNA, MELYNDA - French National Institute For Agricultural Research; HUTCHINGS, NICHOLAS - Aarhus University; KROL, DOMINIKA - Teagasc (AGRICULTURE AND FOOD DEVELOPMENT AUTHORITY); Leytem, April; NOBLE, ALASDAIR - Lincoln University - New Zealand; SALAZAR, FRANCISCO - Inia Remehue - Osorno; THORMAN, RACHEL - Adas; VELTHOF, GERARD - Wageningen University And Research Center

Submitted to: Journal of Environmental Quality
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/10/2020
Publication Date: 1/22/2021
Publication URL: https://handle.nal.usda.gov/10113/7709411
Citation: Beltran, I., Van Der Weerden, T.J., Alfaro, M.A., Amon, B., De Klein, C.A., Grace, P., Hafner, S., Hassouna, M., Hutchings, N., Krol, D.J., Leytem, A.B., Noble, A., Salazar, F., Thorman, R.E., Velthof, G.L. 2021. DataMan: A global dataset of nitrous oxide and ammonia emission factors for excreta deposited by livestock and land-applied manure. Journal of Environmental Quality. https://doi.org/10.1002/jeq2.20186.
DOI: https://doi.org/10.1002/jeq2.20186

Interpretive Summary: Nitrous oxide, ammonia and methane emissions from the manure management chain of livestock production systems are important contributors to greenhouse gases and ammonia emitted by human activities. An international project was created (DataMan) to develop a global database on greenhouse gases and ammonia emissions from the manure management chain (housing, storage and field), to identify key variables influencing emissions, and ultimately to refine emission factors for future national greenhouse gas inventories and ammonia emission reporting. This paper describes the “field” database that focuses on nitrous oxide and ammonia emission factors from land-applied manure and excreta deposited by grazing livestock. We collated relevant information (emission factors, manure characteristics, soil properties and climatic conditions) from published peer-reviewed research, theses, conference papers and existing databases. The database, containing 5,632 observations compiled from 184 studies, was relatively evenly split between nitrous oxide and ammonia. The nitrous oxide data were derived from studies conducted in 21 countries on five continents, with New Zealand, the UK, Kenya and Brazil representing 86% of the data. The ammonia data originated from studies conducted in 17 countries on four continents, with the UK, Denmark, Canada and the Netherlands representing 79% of the data. Wet temperate climates represented 90% of the total database. The DataMan field database is available online at http:// dataman.azurewebsites.net.

Technical Abstract: Nitrous oxide (N2O), ammonia (NH3) and methane (CH4) emissions from the manure management chain of livestock production systems are important contributors to greenhouse gases (GHG) and NH3 emitted by human activities. Several studies have evaluated manure-related emissions and associated key variables at regional, national or continental scales. However, there have been few studies focusing on these emissions using a global dataset. An international project was created (DataMan) to develop a global database on GHG and NH3 emissions from the manure management chain (housing, storage and field), to identify key variables influencing emissions, and ultimately to refine EFs for future national GHG inventories and NH3 emission reporting. This paper describes the “field” database that focuses on N2O and NH3 EFs from land-applied manure and excreta deposited by grazing livestock. We collated relevant information (EFs, manure characteristics, soil properties and climatic conditions) from published peer-reviewed research, theses, conference papers and existing databases. The database, containing 5,632 observations compiled from 184 studies, was relatively evenly split between N2O and NH3 (56% and 44% of the EF values, respectively). The N2O data were derived from studies conducted in 21 countries on five continents, with New Zealand, the UK, Kenya and Brazil representing 86% of the data. The NH3 data originated from studies conducted in 17 countries on four continents, with the UK, Denmark, Canada and the Netherlands representing 79% of the data. Wet temperate climates represented 90% of the total database. The DataMan field database is available online at http:// dataman.azurewebsites.net.