Research Regarding the Influence of Sasonality on the Estrus Induction and Synchronization Treatments with PRID, in Dairy Cows

Casiana Sipetan Ciolac, Ioan Bencsik, Dorel Dronca, Eliza Simiz, Ioan Pet, Gabi Dumitrescu, Valeriu Caraba, Marioara Nicula, Adela Marcu, Liliana Petculescu Ciochina, Mirela Ahmadi, Nicolae Pacala

Abstract


The season of performing treatments can affect the results obtained after treatment of induction and synchronization of estrus in dairy cows.

Synchronization treatments were performed with PRID-Intervet, which contains 1.55 grams of progesterone. The devices were inserted in to the vagina and withdrawn after 12 days, in the next five days they found that females were in heat and A. I. The treatments were conducted in the spring season (April-May), summer (July-August) and autumn (September-October).

In spring season the females in heat rate was 70.83%, in summer it was 68.18% and in autumn the rate was 100.0%. Pregnancy rate was 82, 35% in spring season, 26.66% in summer and 92.3% in autumn. The best results were obtained in autumn, although the worst in the summer season.


Keywords


milk cows; PRID; seasonal influence; pregnancy rate

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Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Faculty of Animal Science and Biotechnologies
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
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