Factors Affecting Grazing and Rumination Behaviours of Dairy Cows in a Pasture-Based System in New Zealand

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dc.citation.issue23
dc.citation.volume12
dc.contributor.authorIqbal MW
dc.contributor.authorDraganova I
dc.contributor.authorMorel PCH
dc.contributor.authorMorris ST
dc.contributor.editorBernabucci U
dc.coverage.spatialSwitzerland
dc.date.accessioned2024-03-11T21:16:07Z
dc.date.accessioned2024-07-25T06:51:20Z
dc.date.available2022-11-28
dc.date.available2024-03-11T21:16:07Z
dc.date.available2024-07-25T06:51:20Z
dc.date.issued2022-12
dc.description.abstractThis study investigated the variation in daily time spent grazing and rumination in spring-calved grazing dairy cows (n = 162) of three breeds, Holstein-Friesian (HFR), Jersey (JE), and KiwiCross (KC) with different breeding worth index, and in different years of lactation (1st, 2nd, 3rd, 4th). The cows were managed through a rotational grazing system and milked once a day at 05:00 a.m. The cows grazed mainly pasture and received supplementary feeds depending on the season. Automated AfiCollar device continuously monitored and recorded grazing time and rumination time of the individual cows throughout the lactation period for three study years (Year-1, Year-2, Year-3) with 54 cows per year. A general linear mixed model fitted with breed × lactation year with days in milk (DIM), breeding worth (BW) index value, individual cow, season, and feed, and their interactions was performed in SAS. Variance partitioning was used to quantify the effect size of study factors and their interactions. Individual cows, DIM, and BW (except Year-3) had effects on grazing and rumination times throughout the study years. Grazing time and rumination time were different for different seasons due to varying supplementary feeds. Grazing time varied among breeds in Year-2 and Year-3, and among lactation years only in Year-1. Although rumination time differed among breeds in Year-3, it remained the same within different lactation years. Grazing time and rumination time had a negative relationship with each other, and their regression lines varied for different seasons. The total variance explained by the model in grazing time was 36-39%, mainly contributed by the individual cow (12-20%), season (5-12%), supplementary feed (2-6%), breed (1-5%), and lactation year (1-6%). The total variance explained in rumination was 40-41%, mainly contributed by the individual cow (16-24%), season (2-17%), supplementary feed (1-2%), breed (2-8%), and lactation year (~1%). These findings could contribute to improving the measures for feed resource management during different seasons over the lactation period for a mixed herd comprising JE, HFR and KC breeds in different years of lactation.
dc.description.confidentialfalse
dc.edition.editionDecember 2022
dc.format.pagination3323-
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/36496843
dc.identifier.citationIqbal MW, Draganova I, Morel PCH, Morris ST. (2022). Factors Affecting Grazing and Rumination Behaviours of Dairy Cows in a Pasture-Based System in New Zealand.. Animals (Basel). 12. 23. (pp. 3323-).
dc.identifier.doi10.3390/ani12233323
dc.identifier.eissn2076-2615
dc.identifier.elements-typejournal-article
dc.identifier.issn2076-2615
dc.identifier.number3323
dc.identifier.piiani12233323
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71024
dc.languageeng
dc.publisherMDPI (Basel, Switzerland)
dc.publisher.urihttps://www.mdpi.com/2076-2615/12/23/3323
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.subjectautomatic behaviour monitoring
dc.subjectgrazing behaviour
dc.subjectindividual animal data
dc.subjectpasture-based system
dc.subjectrumination behaviour
dc.titleFactors Affecting Grazing and Rumination Behaviours of Dairy Cows in a Pasture-Based System in New Zealand
dc.typeJournal article
pubs.elements-id458528
pubs.organisational-groupOther
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