EFFICACY OF BETAINE SUPPLEMENTED WITH DIET AND SEX RESPONSE IN CARACAS COMPONENTS OF BROILER CHICKEN (ROSS) BREED UNDER HEAT STRESS CONDITIONS | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 19, Issue 1, March 2014, Pages 140-149 | ||
| Authors | ||
| D. Alhassani; B. Zangana; H. Al-rubaye; N. Hanash | ||
| Abstract | ||
| This experiment was conducted at the poultry farm, Department of Animal Resources, College of Agriculture, University of Baghdad for the period from August/27/2009 to October/8/2009 to evaluate the efficacy of betaine supplemented to diet in different levels on absolute and relative weights of lean, skin and bone for the major carcass parts of broiler exposed to stress of daily cyclic temperature (24-38-240C) during experimental period. 560 day old, unsexed Ross breed were used and on 7 days old were randomly allocated into 4 treatment groups (140 birds per treatment), 4 replicates per treatment (35 birds per replicate). Supplementing betaine to diet with 0, 500, 800, and 1200 mg / Kg diet have meant T1, T2, T3, and T4 respectively. Rearing period lasted 42 days. Results indicated a significant (p<0.05) increase and improvement in favor of T2, T3, and T4 (especially T4) in comparison withT1 (control) in relative weight of lean, skin, and bone for major parts of carcass, whereas relative weight of thigh and drumstick were significantly (p<0.05) decreased in males than females. Sex had no significant effects on those traits. A significant (p<0.05) superiority and improvement in flesh weight of drumstick and breast in T2, T3, and T4, as well as in skin weight of thigh in T2, and T3 in comparison with rest treatment groups. A high significant (p<0.01) superiority of flesh weight of each thigh, drumstick, and breast was found in males than females in 17.6%. It is concluded that supplementing 500, 800, and 1200 mg betaine/kg diet has contributed to increase flesh of each drumstick and breast parts, besides those traits were high in males than females with decrease relative weights of thighbone, drumstick, and breast parts. | ||
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