Effect of concentrate feeding level on methane emissions, production performance and rumen fermentation of Jersey cows grazing ryegrass pasture during spring

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dc.contributor.author Van Wyngaard, Josef de Villiers
dc.contributor.author Meeske, R.
dc.contributor.author Erasmus, Lourens Jacobus
dc.date.accessioned 2018-08-16T09:42:01Z
dc.date.issued 2018-07
dc.description.abstract Dietary supplementation has been well documented as an effective enteric methane (CH4) mitigation strategy. However, limited studies have demonstrated the effect of concentrate level on enteric CH4 emissions from grazing dairy cows, and to our knowledge none of these studies included a pasture-only diet or reported on rumen fermentation measures. Sixty multiparous (4.0 ± 1.51 SD) Jersey cows, of which six were rumen-cannulated, were used in a randomised complete block design, and the cannulated cows were used in a separate replicated 3 × 3 Latin square design, to investigate the effect of concentrate supplementation (0, 4, and 8 kg/cow per day; as fed) on enteric CH4 emissions, milk production, dry matter intake (DMI), and rumen fermentation of dairy cows grazing perennial ryegrass pasture during spring, following a 14-d adaptation period. The sulphur hexafluoride tracer gas technique was used to measure enteric CH4 emissions from 10 cows of each treatment group over a single 9-d measurement period. Parallel with the CH4 measurement period, pasture DMI was determined using TiO2 and indigestible neutral detergent fibre as external and internal markers, respectively, while milk yield, milk composition, cow condition, and pasture pre- and post-grazing measurements were also recorded. Total DMI (13.4 to 18.0 kg/d), milk yield (12.9 to 19.2 kg/d), energy corrected milk (14.6 to 20.7 kg/d), milk lactose content (46.2 to 48.1 g/kg) and gross energy intake (239 to 316 MJ/d) increased, while milk fat content (50.0 to 44.2 g/kg) decreased with increasing concentrate feeding level. Volatile fatty acid concentrations and ruminal pH were mostly unaffected by treatment, while dry matter disappearance decreased and NH3-N concentration increased with increasing concentrate feeding level. Methane production (258 to 302 g/d) and CH4 yield (20.6 to 16.9 g/kg of DMI) were similar for all cows, while pasture DMI (13.4 to 10.8 kg/d) and CH4 intensity (20.4 to 15.9 g of CH4/kg of milk yield) decreased linearly with increasing concentrate feeding level. Results indicate that concentrate supplementation on high quality pasture-only diets have the potential to effectively reduce CH4 emissions per unit of milk yield from grazing cows during spring. en_ZA
dc.description.department Animal and Wildlife Sciences en_ZA
dc.description.embargo 2019-07-01
dc.description.librarian hj2018 en_ZA
dc.description.sponsorship The Western Cape Agricultural Research Trust (Elsenburg, South Africa), Western Cape Department of Agriculture (Elsenburg, South Africa) and to the Department of Animal and Wildlife Sciences at the University of Pretoria (Pretoria, South Africa) as well as the National Research Foundation (NRF; Pretoria, South Africa). en_ZA
dc.description.uri http://www.elsevier.com/locate/anifeedsci en_ZA
dc.identifier.citation Van Wyngaard, J.D.V., Meeske, R. & Erasmus, L.J. 2018, 'Effect of concentrate feeding level on methane emissions, production performance and rumen fermentation of Jersey cows grazing ryegrass pasture during spring', Animal Feed Science and Technology, vol. 241, pp. 121-132. en_ZA
dc.identifier.issn 0377-8401 (print)
dc.identifier.issn 1873-2216 (online)
dc.identifier.other 10.1016/j.anifeedsci.2018.04.025
dc.identifier.uri http://hdl.handle.net/2263/66173
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2018 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Animal Feed Science and Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Animal Feed Science and Technology, vol. 241, pp. 121-132, 2018. doi : 10.1016/j.anifeedsci.2018.04.025. en_ZA
dc.subject Methane (CH4) en_ZA
dc.subject CH4 measurement en_ZA
dc.subject Perennial ryegrass en_ZA
dc.subject Methane mitigation en_ZA
dc.subject Pasture-based en_ZA
dc.subject Sulphur hexafluoride (SF6) en_ZA
dc.subject Body condition score (BCS) en_ZA
dc.subject Crude protein (CP) en_ZA
dc.subject Days in milk (DIM) en_ZA
dc.subject Dry matter intake (DMI) en_ZA
dc.subject Energy corrected milk (ECM) en_ZA
dc.subject Fat corrected milk (FCM) en_ZA
dc.subject Concentrate feeding level en_ZA
dc.subject Methane emissions en_ZA
dc.subject Production performance en_ZA
dc.subject Rymen fermentation en_ZA
dc.subject Jersey cows en_ZA
dc.subject Ryegrass pasture en_ZA
dc.subject Grazing en_ZA
dc.subject Methanogenesis en_ZA
dc.subject Supplementation en_ZA
dc.subject Lactation en_ZA
dc.subject Energy value en_ZA
dc.subject Milk production en_ZA
dc.subject Enteric methane en_ZA
dc.subject Dairy cows en_ZA
dc.subject Nitrous oxide emissions en_ZA
dc.subject Cattle en_ZA
dc.title Effect of concentrate feeding level on methane emissions, production performance and rumen fermentation of Jersey cows grazing ryegrass pasture during spring en_ZA
dc.type Postprint Article en_ZA


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