Effects of retained fetal membranes treatments and dry period length on the subsequent lactation in cows - milk yield and somatic cell count
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Kuupäev
2021
Kättesaadav alates
Autorid
Skuja, S.
Antāne, V.
Lūsis, I.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Different treatment strategies in cows with retained fetal membranes (RFM) may affect
subsequent lactation in various ways. Also, excessively short or long dry periods (DP) can
decrease milk yield (MY), increase the risk of poor udder health, and increase the risk of RFM.
This study aimed to evaluate how different treatment strategies of RFM affect subsequent
lactation in cows, i.e., MY and udder health determined on the somatic cell count (SCC) bases in
milk, expressed as somatic cell score (SCS). A secondary but equally important objective was to
analyse the dry period length (DPL) effect on the subsequent lactation in cows. The cows from
two herds were divided into three groups: group 1–healthy control; group 2–cows with RFM,
removed manually and treated with intrauterine (IU) antibiotics (AB); group 3–cows with RFM,
not removed, but treated IU with AB. The DP of cows was divided post factum into shortened
(up to 46 days), traditional (47 to 70 days), or prolonged (over 70 days). Statistical analyses were
performed using linear multiple regression and multivariate analyses. Differences were
statistically significant when P <0.05. The effect of different RFM treatment strategies on MY
and SCS was evaluated. There were no statistically significant effects of RFM treatments on the
MY in the subsequent lactation. However, there was a tendency (P = 0.07) for SCS in standard
lactation to be higher in cows in group 2. The highest economic losses, calculated from the
decrease in MY, were detected in the same group. Significantly lower MY was observed in cows
with a shortened DPL during the first 30 days PP (P <0.05). The DPL did not affect the SCS.
Kirjeldus
Received: October 13th, 2020 ; Accepted: December 14th, 2020 ; Published: December 18th, 2020 ; Correspondence: santa.skuja0@gmail.com
Märksõnad
cows, retained fetal membranes, treatment strategies, dry period length, milk yield, somatic cell count, articles