Nitrous oxide emission factors for cattle dung and urine deposited onto tropical pastures: A review of field-based studies

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cg.contributor.affiliationInternational Livestock Research Instituteen
cg.contributor.affiliationKarlsruhe Institute of Technologyen
cg.contributor.donorChina Scholarship Councilen
cg.contributor.donorEuropean Unionen
cg.creator.identifierYuhao Zhu: 0000-0003-1759-6878en
cg.creator.identifierLutz Merbold: 0000-0003-4974-170Xen
cg.creator.identifierSonja Leitner: 0000-0002-1276-8071en
cg.creator.identifierKlaus Butterbach-Bahl: 0000-0001-9499-6598en
cg.creator.identifierDavid Pelster: 0000-0002-0461-7855en
cg.identifier.doihttps://doi.org/10.1016/j.agee.2021.107637en
cg.issn0167-8809en
cg.journalAgriculture, Ecosystems & Environmenten
cg.subject.ilriGHG EMISSIONSen
cg.volume322en
dc.contributor.authorZhu, Yuhaoen
dc.contributor.authorButterbach-Bahl, Klausen
dc.contributor.authorMerbold, Lutzen
dc.contributor.authorLeitner, Sonjaen
dc.contributor.authorPelster, David E.en
dc.date.accessioned2023-03-10T14:36:55Zen
dc.date.available2023-03-10T14:36:55Zen
dc.identifier.urihttps://hdl.handle.net/10568/129497
dc.titleNitrous oxide emission factors for cattle dung and urine deposited onto tropical pastures: A review of field-based studiesen
dcterms.abstractLivestock excreta on pastures is an important source of nitrous oxide (N 2 O) emissions, however studies measuring these emissions in tropical regions, particularly Africa, remain limited. Therefore we measured N 2 O emissions from different quantities of dung patches during three observation periods (dry, wet and transition from dry to wet season) and different volumes of urine patches during wet and dry seasons. Dung patches did not stimulate soil N 2 O emissions in any of the three observation periods, while urine application stimulated soil N 2 O emissions during both seasons, with higher emissions observed during the wet season. The dung EFs (0.00–0.03%) and the urine EFs (0.04–0.40%) showed no detectable effects of dung quantity or urine volume. We further synthesized observations from other studies in wet and dry tropical regions, which indicated that the excreta N 2 O EFs were similar to the default values provided in the IPCC 2019 refinement (0.11% vs 0.07% for dung and 0.41% vs 0.32% for urine in dry climates, and 0.13% vs 0.13% for dung and 0.65% vs 0.77% for urine in wet climates). However, sub-Saharan African (SSA) studies had consistently lower EFs, possibly due to the lower urine-N: dung-N ratio in SSA compared with the other tropical regions, suggesting that the refinement may still overestimate excreta emissions in SSA. Moreover, considering the large variations in the summarized tropical excreta N 2 O EFs, from -0.01 to 1.77% for dung and 0.00 to 4.90% for urine, more studies under diverse conditions across tropical regions are recommended. • Excreta N 2 O emission factors not influenced by mass or volume. • Soil type and N partitioning are overlooked factors in national N 2 O inventories. • IPCC 2019 refinement may still overestimate excreta N 2 O emissions in SSA.en
dcterms.accessRightsOpen Accessen
dcterms.bibliographicCitationZhu, Yuhao; Butterbach-Bahl, Klaus; Merbold, Lutz; Leitner, Sonja; Pelster, David E. 2021. Nitrous oxide emission factors for cattle dung and urine deposited onto tropical pastures: A review of field-based studies. Agriculture, Ecosystems & Environment 322: 107637en
dcterms.extent107637en
dcterms.issued2021-12en
dcterms.languageenen
dcterms.licenseCC-BY-4.0en
dcterms.publisherElsevieren
dcterms.subjectcattleen
dcterms.subjectpasturesen
dcterms.subjectemissionen
dcterms.subjectnitrous oxideen
dcterms.subjecturineen
dcterms.subjectfactorsen
dcterms.subjectdungen
dcterms.typeJournal Articleen

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