Effect of receiving chromium picolinate on the reproductive efficiency of New Zealand white and v-line does in summer [electronic resouce].
Language: English Summary language: Arabic Description: p.209-223Other title:- دراسة مدى تأثير إضافة بيكلونات الكرميوم علي الكفاءة التناسلية لاناث الارانب النيوزلنيدي البيضاء V-line خلال موسم الصيف [Added title page title]
- Egyptian poultry science journal, 2005 v. 25 (I) [electronic resouce].
Includes references.
This study was conducted to study the effects of chromium picolinate CrP supplementation to rabbit diets during the summer season and its amelioration on reproductive traits of New Zealand White (NZW) and V-line rabbit breeds to extend their breeding season to be all year round. The experiment started from May to September (the summer breeding pause in Egypt). The selected doe in a herdbook (November to April at the same year) had at least three littering and similar reproductive performance for each breed. A total of 33 multiparous does (18 NZW and 15 V-line) were divided into three groups for each breed. The first group served as a control, whereas the 2nd and 3rd groups orally received a daily dose of 9 and 18 μg/doe of chromium picolinate CrP respectively throughout the experimental period. Incidence of stillbirth increased (P<0.01) for V-line compared with NZW breed. This may be attributed to the fact that NZW breed is more adapted to hot climate in Egypt compared with V-line breed. Rabbits supplemented with CrP in summer of either breed had greater total litter size, litter weight and viability percentage at birth (P<0.01) compared with control. Moreover, litter size, litter weight, viability percentage and milk yield at 21 and 28 days of age were significantly (P<0.001) higher for does receiving oral CrP compared with control in NZW and V-line breed. Gestation length, total litter size, litter weight and viability percentage at birth were highly improved at the low level CrP (9 μg/doe/day) in the V-line breed. However, similar trend was recorded with the high level CrP (18 μg/doe/day) in the NZW does for two consecutive parities.
Summary in Arabic.
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