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Abstract

Dairy calf and heifer management practices throughout the rearing process have an impact on the longevity of a dairy cow and the herd economy as a whole. Short rearing periods are desirable primarily from economic and genetic standpoints. Dairy calf growth rate is an indicator of the effectiveness...

Author(s)
Lehtsalu, S.; Kaart, T.; Kiiman, H.
Publisher
Akadeemiline Põllumajanduse Selts, Tartu, Estonia
Citation
Agraarteadus, 2010, 21, 1, pp 14-23
Abstract

This study was conducted to investigate the utilization of artificial insemination (AI) bulls of the Estonian Red and Estonian Holstein breeds for breeding Estonian cattle. 213 Estonian Red and 278 Estonian Holstein bulls, whose estimated results of relative breeding value (RBV) on the basis of...

Author(s)
Kaasiku, U.; Saveli, O.
Publisher
Akadeemiline Põllumajansuse Selts, Tartu, Estonia
Citation
Agraarteadus, 2002, 13, 4, pp 212-220
Abstract

The aim of this research was to study the quality of semen of Estonian Red dairy artificial insemination (A.I.) bulls after a 54-day interval in semen collection caused by the relocation of the bulls and their adaptation. 95 ejaculates were collected from 19 bulls during the period of February to...

Author(s)
Padrik, P.; Jaakma, Ü.
Publisher
Akadeemiline Põllumajanduse Selts, Tartu, Estonia
Citation
Agraarteadus, 2003, 14, 3, pp 186-194
Abstract

The aims of the study were to evaluate the influence of age and season of semen collection on sperm motility characteristics as estimated by CASA; and to determine the correlations between frozen-thawed sperm motility characteristics and the bulls' in vivo fertility expressed as non-return rates...

Author(s)
Padrik, P.; Jaakma, Ü.
Publisher
Akadeemiline Põllumajanduse Selts, Tartu, Estonia
Citation
Agraarteadus, 2004, 15, 4, pp 225-233
Abstract

From February to December 1998 in Estonia, 29 AI Holstein bulls were used to study the effects of age, origin and season on sperm concentration on the incidence of morphological abnormalities, sperm motility and intactness of plasma membrane in fresh semen. The highest percentage of sperm...

Author(s)
Padrik, P.; Jaakma, Ü.; Müürsepp, I.
Citation
Agraarteadus, 2000, 11, 1, pp 71-80
Abstract

330 412 cattle were inseminated in 1974, 3.2% more than in 1973. 78.8% of inseminations were with deep-frozen semen. Semen was provided by 435 bulls, of which 348 had provided semen the previous year. Estonian Red (ER) cows were inseminated with semen from 289 ER, Danish Red and Estonian Black Pied ...

Citation
Teaduslike Toode Kogumik. Eesti Loomakasvatuse ja Veterinaaria Teadusliku Uurimise Instituut, 1977, No. 41, pp 71-76, 101-105, 108-111
Abstract

From experiments carried out in the Estonian SSR, the following conclusions were drawn. Sperm concentration in semen for AI should be more than or equal to 3 X 106/mm3, and motility rating should be >8. Hens should be inseminated intravaginally in the afternoon with an 0.05 ml dose of semen. ...

Author(s)
Paesalu, O.
Citation
Eesti Pollumajanduse Akadeemia Teaduslike Toode Kogumik, 1973, No. 77, pp 161-167
Abstract

In the Estonian SSR, 259 874 cows (78.6% of the total) were milk recorded in 1975. The av. herd size was 700 cows. Milk yield averaged 3354 kg with 3.80 and 135 kg fat. 92.9% of all cows were inseminated, by 346 inseminators; the overall NR rate to 1st inseminations was 62.6%. Progeny-tested bulls...

Citation
Teaduslike Toode Kogumik. Eesti Loomakasvatuse ja Veterinaaria Teadusliku Uurimise Instituut, 1977, 44, pp 103 pp.
Abstract

An AI service started in the Estonian SSR in 1956. There are now 6 AI stations, with 361 bulls of the Estonian Red and Estonian Black Pied breeds. In 1977, 371 733 cows were inseminated, representing 93% of cows and 99.5% of heifers on state and collective farms, and 46.9% of privately owned cows....

Author(s)
Saveli, O.
Citation
Teaduslike Toode Kogumik. Eesti Loomakasvatuse ja Veterinaaria Teadusliku Uurimise Instituut, 1979, 48, pp 53-63
Abstract

90 White Leghorn (W.L.) ♀♀ were inseminated with semen from 2 W.L. and 2 Red White-tailed ♂♂ Egg fertility in the periods 2-6 and 2-11 days after insemination was 86.8 and 64.0% resp. from vaginal inseminations, and 68.4 and 52.9% from intra-peritoneal inseminations; corresponding figures for...

Author(s)
PAESALU, O.
Citation
Esti pollum. Akad. tead. Toode Kogum., 1970, 64, pp 70-78

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