دور فيتامين C و النياسين في التقليل من تأثير الإجهاد الحراري في الحملان العرابية

الملخص EN

This study was conducted in the animal field College of agriculture university of Basrah from 1/07/2012 up to 1/10/2012 in order to find out the influence of supplementations of Vitamin C and niacin under heat stress through summer season on physiological traits , growth .

Sixteen Arabi male lambs aged 4-5 months with average weight 26.48kg were used in this experiment The lambs were divided randomly into four groups each group had four replicates.

All these groups fed on a concentrate ration contain barely (60%), wheat brain (38%), urea (1.5%) and NaCl (0.5%) Fed as 2% of body weight .

First group was a control.

The Second group treated with Vitamin C (250mg/1kg feed) , The third group treated with Vitamin Niacin (250mg/1kg food) , The fourth group treated with Vitamin C (250mg/1kg feed) + Niacin (250mg/1kg feed) Water were available and roughages.

The results of the current study summarized as there were significant differences, (P<0.05) in average daily gain and lambs weight of group fed vitamin C compared with others groups, Increase feed intake and Feed conversion ratio of treated group vitamin C group (P<0.05).

There were significant differences (P<0.05) in rectal temperature and breathing rate in all treated groups compared with control group