EFFECT OF BETAINE SUPPLEMENTED TO DIET AND SEX   RESPONSE ON CARCASS WEIGHT AND DRESSING PERCENTAGE OF BROILER CHICKENS(ROSS) REARED UNDER HEAT STRESS CONDITIONS

	EFFECT OF BETAINE SUPPLEMENTED TO DIET AND SEX RESPONSE ON CARCASS WEIGHT AND DRESSING PERCENTAGE OF BROILER CHICKENS(ROSS) REARED UNDER HEAT STRESS CONDITIONS
journal of kerbala university
Article 1, Volume 7, Issue 3, 2011, Pages 369-376 PDF (0 K)
Abstract
This experiment was conducted at the Poultry Farm, Animal Reso. Dept., College of Agriculture, University of Baghdad for the period 27/8 /2009 – 8/10/2009 to investigate the effect of different levels of betaine supplemented with diet on some body and carcass traits, Five hundred and sixty day old unsexed ROSS birds were used and on 7 day of age were allocated randomly into 4 treatments groups (140 birds/treatment), 4 replicates per treatment (35birds/replicate) . Treatments were T1, T2, T3 and T4 represented supplementing with 0,500,800 and 1400 mg betaine / kg diet respectively. Fattening period lasted 42 days, at that time samples were taken. Results indicated a highly significant (p<0.01) superiority in each of live body weight, carcass weight and relative weight of abdominal fat, in addition to improving of dressing percentage with and without edible parts of males in comparison to females. T2 exhibited an improvement in dressing percentage with and without edible parts, and abdominal fat, whereas birds of T4 manifested an improvement in absolute weight of live body and carcass. It is concluded that supplementing betaine in levels; 500, 800 and 1400 mg/ kg diet improved weight of live body and carcass, as well as dressing percentage in males compared with females for broilers have being reared for 42 days under heat stress conditions.

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