Double insemination of cows during one oestrus

• Autorzy: Jankowska M.
• Języki publikacji: EN

Abstrakty

EN

Data on insemination and reinsemination were collected from 1 643 Black and White (BW) cows with varied share of Holstein–Friesian (HF) genes, which belonged to the active population managed in five large–scale production farms in the Kujawsko–Pomorskie Province, Poland. A total number of 351 repeated inseminations were recorded, which amounted to 7.71% of all inseminations. The rates of non–return to oestrus after reinseminations were by 2.05% better in relation to single inseminations, however, an economical analysis led to a conclusion that double insemination does not produce economical benefits and can only be recommended in specific cases, e.g. with prolonged oestrus. Highly significant effect on non–return rates after inseminating once or twice was demonstrated for the factors of HF genes share, farm, milk yield, age at first calving, subsequent calving, and season of insemination.

Słowa kluczowe

EN

first calving; calving; animal breeding; dairy cow; dairy cattle; milk yield; cow; insemination; cattle; oestrus; insemination season; age; reinsemination

• Wydawca: -
• Czasopismo: Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
• Rocznik: 2002
• Tom: 05
• Numer: 1
• Opis fizyczny: http://www.ejpau.media.pl/series/volume5/issue1/animal/art-02.html

Twórcy

autor

Jankowska M.

• University of Technology and Agriculture, Mazowiecka 28, 85-084 Bydgoszcz, Poland

Bibliografia

• Dejneka G., 1994. Niektóre przyczyny niepowodzeń w inseminacji bydła i sposoby ich zwalczania [Some reasons of unsuccessful cattle inseminations and measures of their handling]. Prz. Hod., 6, 2–4 [in Polish].
• Gnyp J., Kamieniecki K., Kowalski P., Małyska T., 1999. Efektywność użytkowania krów czarno-białych w stadach o różnym poziomie wydajności mlecznej [Efficiency of management of Black and White cows in herd of varied milk production]. Zesz. Nauk. PTZ Prz. Hod., 44, 109–115 [in Polish].
• Graves W.M., Dowlen H.H., Lamar K. C., Johnson D.L., Saxton A.M., Montgomery M.J., 1997. The effect of artificial insemination once versus twice per day. J. Dairy Sci., 80, 3068–3071.
• Huba J., Peskovicova D., Chrenek J., Kmet J., 1997. Relationship between fertility traits and 305 days milk yield. J. Farm Anim. Sci., 30, 94–98.
• Jaśkowski L., 1958. Sztuczne unasienianie krów [Artificial Insemination of Cows]. PWRiL, Warszawa, 141–142 [in Polish].
• Kamieniecki H., Klimczak K., Sablik P., 1994. Analiza mierników płodności krów rasy czarno-białej oraz mieszańców z bydłem holsztyńsko-fryzyjskim, pochodzących z obór wielkostadnych województwa szczecińskiego [Analysis of fertility parameters of Black and White cows and their crossbreeds with Holstein–Friesian cattle in large herds of the Szczecin Province]. Zesz. Nauk. AR Szczec., Zootech., 163, 30, 63–69 [in Polish].
• Kupferschmied H.U., 1996. Dwukrotne unasienianie bydła w jednej rui, Andrologia w rozrodzie zwierząt [Repeated insemination of cattle during single oestrus, Andrology in animal reproduction]. Inst. Zootech. Pol. Akad. Umiejęt., Kraków, 153–161 [in Polish].
• Pawlak H., 2001. Za każdą niewykorzystaną ruję płaci hodowca [The breeder pays for each fallow oestrus]. Chów Bydła 5, 17–19 [in Polish].
• SAS/STAT. User’s guide, 1995.
• Wilcox C.J., Pfau K.O., 1958. Effect of two services during estrus on the conception rate of dairy cows. J. Dairy Sci., 41 (7), 997–998.