| Titles |
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English :
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Post- partum reproductive performance of suckling Egyptian native (Baladi) cattle
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| Abstract |
A total of 17 suckling native Baladi cows were used to characterize their post- partum reproductive performance during the days open period, with particular emphasis on season of calving. The calendar year was divided into two main seasons, cold ( from November to April) and hot (from May to October). Cows were checked visually for heat three times daily, at 8 hr intervals starting at 05: 00 hr in a presence of a vasectomized teaser. Standing behavior was considered the main sign of heat even when it was not accompanied by other estrous symptoms. Cows were mated naturally as soon as they showed their first heat. Genitalia were palpated weekly to determine the date of uterine involution (UIP). Blood progesterone concentration was determined twice a week for monitoring ovarian activity. The interval from parturition to the first ovulation (PPOI), estrus( PPEL), fertile service (DO) and next calving (CI) were estimated as well as the number of services required for conception (NS/C) and conception rate (CR%). Estrous signs were classified into weak moderate and strong according to the number of heat signs that a cow displayed. Heat period (the interval from the start to the end of the heat period) was also recorded.
Results indicated that season of calving had no effect on all the studied parameters. Means of UIP ,PPOI, PPEI, DO and CI were 28.8,45.0,55.3,70.8 and 359.0 days, respectively. Number of services per conception was 1.3 in both seasons, with a higher conception rate in the cold ( 87.5%) than in the hot (66.7%) season.
Quiet ovulation incidence represented one third of the total ovulations. the average length of the heat period was found to be less than 10 hours, with a relatively longer period in the cold season. The length of the heat period increased with ovulation repetition, as it was longer in the second heat than in the first one. Heat intensity was moderate on average, however the percentage of pronounced heat cases (strong and moderate) was higher in the hot (88.6%) than in the cold (60%) season.
Keywords: Egyptian native cattle (Baladi), post-partum,
reproductive performance.
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| Publication year |
2001
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| Pages |
79-86
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| Availability location |
معهدبحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
Egyptian Journal Animal Production
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| ISSN |
0302-4520
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| Author(s) from ARC |
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| External authors (outside ARC) |
اشرف برقاوى
جامعة القاهرة
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Cows.
Reproductive performance.
Suckling.
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| Proposed Agrovoc |
post-partum;Egyptian native cattle(Baladi);season of calving;first ovulation;estrus;fertile service;next calving;
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| Publication Type |
Journal
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