Challenges of applying selective dry cow treatment on Czech dairy farms

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Challenges of applying selective dry cow treatment on Czech dairy farms

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Challenges of applying selective dry cow treatment on Czech dairy farms

Popis výsledku anglicky

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.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

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

Projekt

<a href="/cs/project/QK21010123" target="_blank" >QK21010123: Vývoj metod redukce průniku antibiotik do prostředí v chovu dojnic jako podpora prevence vzniku antibiotické rezistence mikroorganismů</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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