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Discrimination of "grazing milk" using milk fatty acid profile in the grassland dairy area in Hokkaido

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Title: Discrimination of "grazing milk" using milk fatty acid profile in the grassland dairy area in Hokkaido
Authors: Mitani, Tomohiro Browse this author →KAKEN DB
Kobayashi, Kuniyuki Browse this author →KAKEN DB
Ueda, Koichiro Browse this author →KAKEN DB
Kondo, Seiji Browse this author →KAKEN DB
Keywords: discrimination
fatty acid profile
grassland dairy area
grazing milk
Issue Date: 29-Jul-2015
Publisher: Wiley-Blackwell
Journal Title: Animal science journal
Volume: 87
Issue: 2
Start Page: 233
End Page: 241
Publisher DOI: 10.1111/asj.12422
PMID: 26220515
Abstract: Milk produced by the grazing system, referred to as grazing milk contains many components required for human health. The milk fatty acid (FA) profile is strongly associated with the diet on the farms. In the present study, based on the FA profile of farmer's bulk milk, we determined how to discriminate between milk produced on grazing and on a confinement system. A field survey was conducted four times (grazing and confinement season) in the Konsen (29 farms) and Okhotsk (25 farms) area in Hokkaido. Farmer's bulk milk samples and details of feeding management were collected and the FA profile of milk was measured. Milk produced during the grazing season contained less C16:0 and cis-9 C16:0, and more C18:0, cis-9 C18:1, trans-11 C18:1, cis-9,12 C18:2, cis-9,trans-11 C18:2 and cis-9,12,15 C18:3 than milk produced during the confinement season. Discrimination analysis using 16 FA revealed that almost all milk samples were discriminated correctly (confinement season: 90% correct and 10% borderline, grazing season: 88% correct, 9% borderline and 3% incorrect). For farmers that were categorized incorrectly and were considered borderline in the grazing season, the dependency on pasture was low compared with that for farmers correctly discriminated. Therefore, to claim grazing milk, a high dependency on pasture is required for grazing dairy farmers.
Rights: This is the peer reviewed version of the following article: [Animal Science Journal Vol387, Issue2, Page:233-241 ], which has been published in final form at [DOI: 10.1111/asj.12422]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Type: article (author version)
URI: http://hdl.handle.net/2115/64422
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三谷 朋弘

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