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Effects of grazing adaptation on intake, ruminal fermentation, blood metabolites, and body weight change in dairy cows after turning out to pasture in early spring

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Title: Effects of grazing adaptation on intake, ruminal fermentation, blood metabolites, and body weight change in dairy cows after turning out to pasture in early spring
Authors: Mitani, Tomohiro Browse this author →KAKEN DB
Kubota, Tomoyo Browse this author
Mizuguchi, Hitoshi Browse this author
Kushibiki, Shiro Browse this author
Ueda, Koichiro Browse this author →KAKEN DB
Keywords: blood metabolites
body weight change
grazing adaptation
herbage intake
ruminal fermentation
Issue Date: 7-Nov-2020
Publisher: John Wiley & Sons
Journal Title: Animal science journal
Volume: 91
Issue: 1
Start Page: e13481
Publisher DOI: 10.1111/asj.13481
Abstract: This study investigated the effect of adaptation to grazing in early spring on herbage intake, ruminal fermentation parameters, blood metabolite concentrations, and body weight change in dairy cows. The experiment was conducted on eight rumen-cannulated non-lactating cows in the early spring period. Four cows were adapted to grazing by stocking for 4 hr for 1 week (ADP group). The other cows were kept in a barn during the period (CON group). Then, both groups of cows were stocked together throughout a day on a 1 ha pasture for 3 weeks (experimental period). In the first week of the experimental period, compared to the CON group, the ADP group had a higher herbage intake, ruminal NH3-N and total VFA concentration, and blood urea concentration, but the NEFA concentration was lower in the ADP group (p < .01). During the subsequent weeks, there were little differences in ruminal fermentation parameters and blood metabolites. Cows in the ADP group maintained their body weight, but cows in the CON group lost 60 kg of body weight in the first week of the experimental period.
Rights: This is the peer reviewed version of the following article:[Animal Science Journal Vol91, Issue1, Page:e13481] , which has been published in final form at [https://onlinelibrary.wiley.com/doi/10.1111/asj.13481]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Type: article (author version)
URI: http://hdl.handle.net/2115/83727
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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