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- Title
EFFECT OF DIETARY BETAINE SUPPLEMENTATION ON PRODUCTIVE, PHYSIOLOGICAL AND IMMUNOLOGICAL PERFORMANCE AND CARCASS CHARACTERISTIC OF GROWING DEVELOPED CHICKS UINDER THE CONDITION OF HEAT STRESS.
- Authors
Nofal, M.E; Magda, A. Galal; Mousa, S.M.M.; Doaa, M.M. Yassein; Bealsh, A.M.A.
- Abstract
The objective of this study was to determine the effect of betaine supplementation on growth performance, carcass characteristics, physiological, and immune response of heat stressed growing chicks, and try to employ some useful properties of betaine for reducing the adverse effect of heat stress conditions. Nine hundred 50% mail and 50% female 8 - weeks old of Inshas chicks were divided into three groups with three replicates of 100 chicks each. The birds were reared on floor and assigned to dietary betaine sup plementation 0.0, 0.1% and 0.2 % (Treatments A, B and C, respectively). At 13 wks of age each dietary treatment divided into two sub groups of 150 birds with three replicates50 birds each. One sub group of each treatment was exposed to heat stress (39.5 to 41 C°) five hours for five excessive days and another without heat stress. Both feed and water were provided ad - libitum during experimental period (8 to 16 wks). The average daily temperature and relative humidity were 26± 3 C° and 66.2 ± 2.5%, respectively. The results indicated that: 1 - Each of, body weight, body weight gain and feed conversion significantly (P≤0.01) improved by dietary betaine supplementation during the first period (8 - 12 wks of age). 2 - Finial body weight, weight gain, feed conversion values and mortality percentage significantly (P≤ 0.05or P ≤ 0.01) improved by dietary betaine supplementation during the period from 13 - 16 wks of age. 3 - Each of rectal temperature, respiratory rate and blood P H were decreased significantly ,while, T 3 Hormone increased with supplementing betaine in diet as compared with control. 4 - Hetrop hlic % and H / L ratio were significantly (P ≤ 0.01) decreased, while, lymphocyte % and monocyte % were significantly (P ≤ 0.05) increased by dietry betaine supplementation as compared with control. Hetrophlic and H / L ratio were significantly (P ≤ 0. 01) increased, but lymphocyte and monocyte were significantly (P ≤ 0.01) decreased by exposing to heat stress as compared with unheated groups. 5 - Carcass weight, dressing %, thigh%, breast % and giblets% were increased significantly by supplementation betaine to the diets. However, dressing % and breast % were significantly (P ≤ 0.05) decreased by exposure to heat stress as compared with unheated group. In conclusion, dietary supplemental 0.1% betaine enhanced growth performance, physiological as well as reduced rectal temperature , respiration rate and blood P H , humoral and cell - mediated immunity and carcass yield for growing developed chickens subjected to heat stress.
- Subjects
BETAINE; POULTRY feeding; LIVESTOCK carcasses; LIVESTOCK productivity; EFFECT of heat on poultry; NUTRITIONAL immunology; PHYSIOLOGY
- Publication
Egyptian Poultry Science Journal, 2015, Vol 35, Issue 1, p237
- ISSN
2090-0570
- Publication type
Article