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Egyptian Poultry Science Journal
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Elsheikh, T. (2017). EFFECT OFBETAINE LEVELS ON BROILER PERFORMANCE UNDER CYCLIC HEAT STRESS. Egyptian Poultry Science Journal, 37(2), 623-636.
Talaat Mostafa Elsheikh. "EFFECT OFBETAINE LEVELS ON BROILER PERFORMANCE UNDER CYCLIC HEAT STRESS". Egyptian Poultry Science Journal, 37, 2, 2017, 623-636.
Elsheikh, T. (2017). 'EFFECT OFBETAINE LEVELS ON BROILER PERFORMANCE UNDER CYCLIC HEAT STRESS', Egyptian Poultry Science Journal, 37(2), pp. 623-636.
Elsheikh, T. EFFECT OFBETAINE LEVELS ON BROILER PERFORMANCE UNDER CYCLIC HEAT STRESS. Egyptian Poultry Science Journal, 2017; 37(2): 623-636.

EFFECT OFBETAINE LEVELS ON BROILER PERFORMANCE UNDER CYCLIC HEAT STRESS

Article 18, Volume 37, Issue 2, June 2017, Page 623-636  XML PDF (664.9 K)
Document Type: Original Article
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Author
Talaat Mostafa Elsheikh
1 Dep. of Poult. Prod., Fac. of Agric., Sohag Uni., Sohag, Egypt.
Abstract
This study was carried out at the Research Poultry Farm, Faculty of
Agriculture, Sohag University,Egypt. It was designed to study the effect of betaine
supplementation on broilers performance under cyclic heat stress. A total number of 375 Ross,
one day-old were equally divided into five groups (75 birds/group) with three replicates
(25birds / replicat). In the first group, birds were fed a commercial ration produced with
ALWADI Company without any betaine supplementation and served as control group. While,
birds in the 2nd, 3rd, 4th and 5th groups were fed the same diet with supplemented betaine at
different levels of 100, 150, 200 and 250% i.e. 2, 3, 4 and 5kg betaine/1000 kg diet,
respectively compared to the company recommendations. All birds were daily exposed to
cyclic heat stress (35◦C) from 8 AM to 4 PM and then from 4 PM to 7 AM , they were exposed
to natural ambient temperature. Chicks in all groups were housed in partitioned litter floor.
Each pen was used as a replicate (25chicks) of the treatment, provided with a feeder and one
nipple for supplementing water. Feed and water were available ad-libitim throughout the
experimental period. All chicks were exposed to traditional continuous lighting programs with
60 watt from incandescent lamb at the height of 2.4 m from the floor up to the marketing age.
The results showed that the BW and BWG significantly improved in treated groups. Feed
consumption and feed conversion ratio significantly improved in treated groups. Rectal
temperature significantly increased at 42 days of age and respiration rate significantly
increased at 14, 21 and 42 days of age in treated groups. Heart percentage significantly
increased in treated groups compared to control group. Chemical composition of meat was no
significantly affected with betaine levels compared to control group.
Keywords
Betaine levels; cyclic heat stress; performance; Broilers
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