Postpartal resumption of ovarian activity in dairy cows: Implications for herbage-based feeding systems in Switzerland.

Gross, J. J.; Kawashima, C; Dohme-Meier, F; Miyamoto, A; Bruckmaier, R (2020). Postpartal resumption of ovarian activity in dairy cows: Implications for herbage-based feeding systems in Switzerland. Schweizer Archiv für Tierheilkunde, 162(11), pp. 667-674. Gesellschaft Schweizer Tierärztinnen und Tierärzte 10.17236/sat00276

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INTRODUCTION

Milk production in Switzerland is mainly based on herbage feeding with little input of concentrates. The present study investigated the effects of a solely herbage-based diet with (C) and without concentrate (nC) supplementation on luteal activity, milk production and metabolic status in 23 multiparous Holstein dairy cows with early or delayed resumption of ovarian cyclicity post partum (pp). Cows were retrospectively assigned either to a group with early (until d 25 pp, EOV) or delayed resumption of ovarian activity (> d 30 pp, DOV), resulting in four subgroups depending on concentrate feeding: DOV-C, DOV-nC, EOV-C, EOV-nC. Milk progesterone (P4) concentration was measured every 3 d, and different metabolites were analyzed in weekly blood samples. Resumption of ovarian activity was detected between d 19 and 25 pp in EOV, and between d 30 and 60 pp in DOV. In DOV-C, resumption of cyclicity tended to start earlier (38.3 ± 1.7 d pp) compared to DOV-nC (45.2 ± 6.3 d pp; P = 0.10). Independent of grouping, the ovarian activity occurred later in cows with greater plasma β-hydroxybutyrate (BHB) concentrations (P  1 ng/mL did not differ between groups (P > 0.05), but milk P4 peaks during the experiment were higher in EOV compared to DOV (P .

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Physiology

UniBE Contributor:

Gross, Josef Johann

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)

ISSN:

1664-2848

Publisher:

Gesellschaft Schweizer Tierärztinnen und Tierärzte

Language:

English

Submitter:

Josef Johann Gross

Date Deposited:

19 Nov 2020 14:38

Last Modified:

19 Nov 2020 14:38

Publisher DOI:

10.17236/sat00276

PubMed ID:

33140725

Uncontrolled Keywords:

Fortpflanzung Grasfütterung Stoffwechsel Wiederaufnahme der Ovaraktivität alimentation en herbe alimentazione con erba erste Ovulation first ovulation herbage feeding metabolism metabolismo métabolisme première ovulation prima ovulazione reprise de l’activité ovarienne reproduction resumption ovarian activity ripresa dell’attività ovarica riproduzione

BORIS DOI:

10.7892/boris.148239

URI:

https://boris.unibe.ch/id/eprint/148239

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