Methane emissions intensity in grazing dairy cows fed graded levels of concentrate pellets

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dc.citation.issue3
dc.citation.volume67
dc.contributor.authorBosher T
dc.contributor.authorDella Rosa MM
dc.contributor.authorKhan MA
dc.contributor.authorSneddon N
dc.contributor.authorDonaghy D
dc.contributor.authorJonker A
dc.contributor.editorCorner-Thomas R
dc.contributor.editorHandcock R
dc.contributor.editorSneddon N
dc.date.accessioned2024-07-16T21:03:59Z
dc.date.available2024-07-16T21:03:59Z
dc.date.issued2024-05-03
dc.description.abstractThe current New Zealand greenhouse gas inventory predictions assume that dairy cows consume pasture only, but the use of supplemental feeds, including concentrates, on New Zealand dairy farms has increased greatly in recent decades. The objective of this study was to evaluate the effect of feeding graded levels of concentrates on methane (CH4) emissions in lactating dairy cows within a pastoral system. Early lactation dairy cows (n = 72) were allocated (n = 18 per treatment) to receive 0, 2, 4 and 6 kg dry matter (DM) of treatment concentrates per day during milking. The cows grazed pasture ad libitum and CH4 emissions were measured in the paddocks using automated emissions monitoring systems called ‘GreenFeed’. Gross CH4 emissions (g/d) were similar for cows across the four dietary treatments, while CH4 emissions intensity (g/kg fat and protein corrected milk production (FPCM) and milk solids production) linearly decreased with increasing concentrate inclusion in the diet (P < 0.02). The CH4 intensity decreased linearly (r2 = 0.42) and quadratically (r2 = 0.53) with increasing FPCM production.
dc.description.confidentialfalse
dc.edition.editionMay 2024
dc.format.pagination296-302
dc.identifier.citationBosher T, Della Rosa MM, Khan MA, Sneddon N, Donaghy D, Jonker A. (2024). Methane emissions intensity in grazing dairy cows fed graded levels of concentrate pellets. New Zealand Journal of Agricultural Research. 67. 3. (pp. 296-302).
dc.identifier.doi10.1080/00288233.2023.2296923
dc.identifier.eissn1175-8775
dc.identifier.elements-typejournal-article
dc.identifier.issn0028-8233
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/70197
dc.languageEnglish
dc.publisherTaylor and Francis Group
dc.publisher.urihttps://www.tandfonline.com/doi/full/10.1080/00288233.2023.2296923
dc.relation.isPartOfNew Zealand Journal of Agricultural Research
dc.rights(c) 2024 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleMethane emissions intensity in grazing dairy cows fed graded levels of concentrate pellets
dc.typeJournal article
pubs.elements-id486492
pubs.organisational-groupCollege of Health
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