Modelling Lactation Curves for Dairy Sheep in a New Zealand Flock

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dc.citation.issue3
dc.citation.volume13
dc.contributor.authorMarshall AC
dc.contributor.authorLopez-Villalobos N
dc.contributor.authorLoveday SM
dc.contributor.authorEllis A
dc.contributor.authorMcNabb W
dc.coverage.spatialSwitzerland
dc.date.accessioned2024-05-29T01:37:19Z
dc.date.available2024-05-29T01:37:19Z
dc.date.issued2023-01-19
dc.description.abstractLactation curves were modelled for dairy sheep in a New Zealand flock, providing information on the lactation yields of milk, fat, protein, and lactose, corrected for 130 days of milking. From 169 ewes, a total of 622 test-day records were obtained during the milk production season of 2021-2022 (from October to January). The flock produced an average of 86.1 kg of milk, 5.1 kg of fat, 4.5 kg of protein, and 4.1 kg of lactose, and moderate to large coefficients of variation were observed (27-31%) for these traits. The lactation persistency of milk, fat, protein, and lactose yields ranged from 52.3 to 72.7%. Analyses of variance for total yield and persistency were performed with an animal model that included the fixed effects of age (parity number), litter size, coat colour, and milking frequency (days in twice-a-day milking) and random residuals. Age and milking frequency were the only factors that significantly affected the yields of milk, fat, protein, and lactose. Age significantly affected the lactation persistency of milk and lactose yields, whereas litter size affected the persistency of protein, and milking frequency affected the persistency of fat. This study on this single flock provides valuable experience for a larger-scale animal breeding programme in New Zealand.
dc.description.confidentialfalse
dc.edition.editionFebruary-1 2023
dc.format.pagination349-
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/36766237
dc.identifier.citationMarshall AC, Lopez-Villalobos N, Loveday SM, Ellis A, McNabb W. (2023). Modelling Lactation Curves for Dairy Sheep in a New Zealand Flock.. Animals (Basel). 13. 3. (pp. 349-).
dc.identifier.doi10.3390/ani13030349
dc.identifier.eissn2076-2615
dc.identifier.elements-typejournal-article
dc.identifier.issn2076-2615
dc.identifier.number349
dc.identifier.piiani13030349
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69688
dc.languageeng
dc.publisherMDPI (Basel, Switzerland)
dc.publisher.urihttps://www.mdpi.com/2076-2615/13/3/349
dc.relation.isPartOfAnimals (Basel)
dc.rights(c) The author/sen
dc.rights.licenseCC BYen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectanimal model
dc.subjectdairy sheep
dc.subjectlactation curve
dc.subjectlactation persistency
dc.subjectmilk production
dc.titleModelling Lactation Curves for Dairy Sheep in a New Zealand Flock
dc.typeJournal article
pubs.elements-id459851
pubs.organisational-groupOther
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