Challenges of applying selective dry cow treatment on Czech dairy farms

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F23%3A96643" target="_blank" >RIV/60460709:41210/23:96643 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Challenges of applying selective dry cow treatment on Czech dairy farms

Original language description

Lately, more emphasis is placed on biotechnological methods to counter the decrease in the conception rate. The ovum pickup (OPU) allows for repeated and long-term extraction of oocytes from the best cows for in vitro fertilization. This paper aimed to evaluate the results of oocyte aspiration in relation to the metabolism status of Holstein cows and to investigate the effect of this procedure on the further reproductive capability of tested cows. We evaluated 63 cows on their first lactation (36 to 82 DIM). Each tested cow was aspirated twice in a weekly interval. The energy metabolism status was accessed by the fat/protein (F/P) ratio in milk – average during 25 to 35 DIM. Blood samples were also collected and analysed for cholesterol, triacylglycerol, beta-hydroxybutyrate (BHB) and non-esterified fatty acids (NEFA). The OPU began with ultrasonographic examination of the ovaries. A total of 231 oocytes were aspirated from 95 successful OPU. The mean F/P ratio of tested cows was 1.078 with a range of 0.88 to 1.63. The average cholesterol was 4.36 mmol/l, triacylglycerol was 0.11 mmol/l, BHB was 0.30 mmol/l, and NEFA was 0.62 mmol/l. We observed great variability for the F/P ratio and blood metabolites, which demonstrated existing differences in the metabolic status. Most oocytes (OPU with 5 to 12 aspirated oocytes) were collected from dairy cows with approximately average F/P ratio, BHB, and NEMK values.

Czech name

—

Czech description

—

Type

O - Miscellaneous

CEP classification

—

OECD FORD branch

40201 - Animal and dairy science; (Animal biotechnology to be 4.4)

Project

<a href="/en/project/QK21010123" target="_blank" >QK21010123: Development of methods of reducing the penetration of antibiotics into the environment in dairy farming as a support for the prevention of the emergence of antibiotic resistance of microorganisms</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů