Effect of Different Periods of Feed Withdrawal Before Slaughtering in   Two Broiler Strains on Meat Quality

Sulaiman  Abdullah, Mohmmed

	Effect of Different Periods of Feed Withdrawal Before Slaughtering in Two Broiler Strains on Meat Quality
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 14, Issue 2, 2014, Pages 21-27
Author
Mohmmed Sulaiman Abdullah
Abstract
The purpose of this study was to evaluate the effects of different feed withdrawal (FW) periods(0, 4, 8 and 12 h) on live broiler weight loss, dressed chilled carcass yields, and meat chemical composition in both breast meat and thigh of two broiler strains( Ross-308 and Hubbard) , A total number of 64 broiler chickens at 36 days were used equally in two strains Ross-308 and Hubbard , each strain contains 4 treatments and 8 replicates. Broiler chickens in control group (T1 without feed withdrawal, T2 , T3 and T4 were fasted to 4 , 8 and 12 hours before slaughtering respectively . The effect of feed withdrawal before slaughtering in broilers is presented significantly Percentages of SFW increased( P<0.05) linearly with time, from 1.65% at the FW period of 4 h to 3.50% at 12 h, The initial pH1 values of the meat were determined immediately after slaughtering and the final pH2 values after a 24 hour cooling period. were determined in the both strains Ross-300 and Hubbard in spite of reduce pH2 values with compared pH1 values, While the results showed no significant differences in each part of carcass percentage and meat chemical composition among treatments and between the two strains (Ross 308 and Hubbard).
Keywords
Feed withdrawal; slaughtering; Broiler strains; Meat Quality

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