Effect of oxytocin adminstration on milking characteristics and some physiological responses of Baladi cows
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.
Publication year 2002
Pages 1441-1447
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
City المنصورة
serial title Journal Agricultural Science Mansoura University
ISSN 1110-0346
Author(s) from ARC
External authors (outside ARC)
    ياسين محمد حافظ جامعة القاهرة
Agris Categories Animal physiology - Nutrition
AGROVOC
TERMS		 Cows. Milking. Oxytocin. Physiological functions.
Proposed Agrovoc physiological responses;
Publication Type Journal
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