Abd El·Gawad,, A., EI-Monlary, M., Hemid, A. (2005). DEITARY SUPPLEMENTATION OF BETAINE AS AN ATIEMPT TO ALLEVIATE THE EFFECTS OF HEAT STRESS ON BROILER CHICKS.. Journal of Animal and Poultry Production, 30(7), 3585-3598. doi: 10.21608/jappmu.2005.238014
A. H. Abd El·Gawad,; M. M.A. EI-Monlary; A. A. Hemid. "DEITARY SUPPLEMENTATION OF BETAINE AS AN ATIEMPT TO ALLEVIATE THE EFFECTS OF HEAT STRESS ON BROILER CHICKS.". Journal of Animal and Poultry Production, 30, 7, 2005, 3585-3598. doi: 10.21608/jappmu.2005.238014
Abd El·Gawad,, A., EI-Monlary, M., Hemid, A. (2005). 'DEITARY SUPPLEMENTATION OF BETAINE AS AN ATIEMPT TO ALLEVIATE THE EFFECTS OF HEAT STRESS ON BROILER CHICKS.', Journal of Animal and Poultry Production, 30(7), pp. 3585-3598. doi: 10.21608/jappmu.2005.238014
Abd El·Gawad,, A., EI-Monlary, M., Hemid, A. DEITARY SUPPLEMENTATION OF BETAINE AS AN ATIEMPT TO ALLEVIATE THE EFFECTS OF HEAT STRESS ON BROILER CHICKS.. Journal of Animal and Poultry Production, 2005; 30(7): 3585-3598. doi: 10.21608/jappmu.2005.238014
DEITARY SUPPLEMENTATION OF BETAINE AS AN ATIEMPT TO ALLEVIATE THE EFFECTS OF HEAT STRESS ON BROILER CHICKS.
1Animal Production Oep. National Research Center, Dokkl, Cairo, Egypt.
2Poultry Production Oep. Faculty of Agriculture, Ain Shams University, Cairo. Egypt.
Abstract
An experiment was concucted to study the effects of adding graded levels of betaine either alone or in combination with either enzymes preparation (EP) containing ec-ernylase. xylanase and protease or Ascorbic acid (Vitamin C) on productive performance and carcass characteristics of broiler chicks raised under high ambient temperatures. A number of 144 day- old "Hubbard" broiler chicks were assigned to 6 treatment groups of 24 chicks in individual cages where every chick represented one replicate. The six experimental diets were: control treatment diet (T ,) which was formulated to be without supplemental betaine. treatments diets (Ta) , (T3) and (T4) which were similar to control diet (TI) but they were supplemented with commercial betaine (91%) at inclusion rate of 500.1000 or 1500 ppm, respectively. While, (Ts) and (Ts) diets were supplemented with 1000 ppm betaine (91%) combined with 1 kg of EPfron or 200 ppm Vitamin C (1 kg 20% I Ton).
Chicks of all treatments had similar growth performance at the end of starter period (18 days of age). Thenafter, body weight of chicks at the end of growing period (40 days of age) increased by increasing dietary betaine level (T2, T3, T., To, and Ts), with priority for Ts and Ts (P<O.OS) over the control (T1). While. the dietary treatments did not show any significant effect on feed consumption and feed conversion ratio at this age. At 49 days of age, the best results in regard to the productive performance, carcass characteristics and economic efficiency were recorded by using either 1500 ppm added betaine only (T.) or 1000 ppm betaine combined with EP or VItamin C (T 5 Or T G. respectively).
It could be concluded that the usa of betaine supplemented diets (graded levels alone or in combination with either EP or Vit.C) may be considered as a suitable mean to overcome the depressing effect of heat stress. The dietary betaine level of 1500 ppm or 1000 ppm combined with either 1 kg of EP fron feed or 200 ppm Vit.C would be preferable lor chicks kept at hot conditions, with respect to growth performance and economic efficiency.
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