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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2009 > Volume 8 Number 5 > A.M. Hassan1, H. May AbdelAzeem1 and P.G. Reddy2

Effect of Some Water Supplements on the Performance and Immune System of Chronically Heat-Stressed Broiler Chicks

A.M. Hassan1, H. May AbdelAzeem1 and P.G. Reddy2
1Department of Animal Hygiene, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt 2Department of Pathobiology, College of Veterinary Medicine, Tuskegee University, Tuskegee, AL 36088, USA
Abstract :

Effects of water supplements, sodium bicarbonate (NaHCO3), potassium chloride (KCl) and acetic
acid were evaluated on the performance and immune system of chronically heat-stressed broiler chicks. Two hundred day old broiler chicks were allotted to one of the four groups (n = 50); 1) control [no supplements], 2) NaHC0 0.5%, 3) KCl, 0.15% and 4) acetic acid, 1.5 mL/Liter. All chicks were kept in a controlled 3, environmental chamber maintained at 33±2oC from day one to 6 weeks (wks) of age. Significantly higher weight gains coincided with decreased feed conversion ratios for all the supplemented groups as compared to control group at 2, 4 and 6 wks of age. Bursal index, percentage weights of thymus and spleen in relationto body weight and natural agglutinin levels, an indicator of humoral immunity were higher but the heterophil:lymphocyte ratio, an indicator of stress was lower for the supplemented groups as compared to control group. Total aerobic spore formers and Enterobactraecae counts in the intestinal swab samples were higher in control group than supplemented groups. Intestinal pH was lower at 2, 4 and 6 weeks of age but water consumption at 5 and 6 wks of age tended to be higher in acetic acid treated group as compared to other groups. Overall, the results indicated significant improvement in the performance and immune response of chronically heat-stressed broiler chicks given the water supplements, acetic acid being slightly superior to NaHCO3 and KCl.

Keywords :
Heat stress, water supplements, acetic acid, sodium bicarbonate, potassium chloride, immunity, intestinal pH

Date Deposited : 05 Jul 2011 13:01

Last Modified : 05 Jul 2011 13:01

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 8, Number 5, - 2009 , ISSN 1682-8356

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