| Titles |
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English :
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Effect of oxytocin adminstration on milking characteristics and some physiological responses of Baladi cows
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Arabic :
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تأثير الحقن بالاكسيتوسين على خصائص الحلب و بعض الاستجابات الفسيولوجية في الابقار البلدية
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| Abstract |
To examine the role of oxytocin in eliciting milk ejection, an experiment was conducted at EI-Serw farm belonging to Animal Production Research Institute, Ministry of Agriculture. A total of 24 Baladi cows were divided into three equal symmetric groups and injected intramuscularly prior milking with either saline (control) or 5 IU and 10 IU oxytocin.
Administration of 10 IU of oxytocin produced shortest (P<0.05) milk let down time and milking time (2.0 and 4.2 min, respectively), also greatest (P<0.05) peak flow rate and average flow rate (1.0 and 0.62 kg/min, respectively).
Variations in stripping time (0.43 to 0.49 min) and .in milk yield (2.2 to 2.7 kg/milking) were not significant, but more fat yield was harvested after administration of oxytocin (72.2, 95.3 and 94.4 g fat/milking for control, 5 IU and 10 IU oxytocin, respectively).
Normal nutritive constituents of milk (g/100ml), specific gravity and somatic cell count were not significantly affected by oxytocin injection. There were no significant effects of oxytocin administration on total plasma protein, GOT and GPT, creatinine and bilirubin and cortisol levels. These findings indicate that oxytocin enhances milk ejection reflex without direct stimulatory action on mammary and body metabolism.
Keywords: oxytocin, Baladi cows, milking characteristics, physiological responses.
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| Publication year |
2002
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| Pages |
1441-1447
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| Availability location |
معهد بحوث 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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| City |
المنصورة
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| serial title |
Journal Agricultural Science Mansoura University
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| ISSN |
1110-0346
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| Author(s) from ARC |
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| External authors (outside ARC) |
ياسين محمد حافظ
جامعة القاهرة
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| Agris Categories |
Animal physiology - Nutrition
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AGROVOC
TERMS |
Cows.
Milking.
Oxytocin.
Physiological functions.
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| Proposed Agrovoc |
physiological responses;
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| Publication Type |
Journal
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