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Paper Information

Journal:   AGRICULTURAL SCIENCES AND TECHNOLOGY   2006 , Volume 20 , Number 7; Page(s) 25 To 35.
 
Paper: 

THE EFFECT OF FEED RESTRICTION LEVELS AND METHODS ON COMPENSATORY GROWTH OF BROILER CHICKENS

 
 
Author(s):  SHARIAT MADARI F., GOLKA S.M.
 
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Abstract: 
This experiment was carried out in order to investigate the effects of various levels and methods of feed restriction on compensatory growth, performance and carcass characteristics of broilers. In a 3x3 factorial experiment, the effects of three methods of feed restriction: 1) Restriction by hull rice (20, 30, 40%), 2) Protein restriction (15, 25, 35% less than control), and 3) Physical restriction (10, 20, 30% less than control) in 4 replicates and 7 male birds (103-104g) in each replicate from 7th to 14th days of age on their subsequent performances were determined. After the termination of feed restriction period until slaughter time (49 days of age) all the treatments including control treatment were fed ad libitum. One bird from each replicate of experimental groups was slaughtered at the end of experiment. Restriction method did not have a significant effect on total feed intake (p>0.05) but levels' effect were significant (p<0.05). Neither methods nor levels had any significant effects on weight gain (p>0.05). Also, significant differences were not observed in methods and levels in comparison with control treatment at 7th weeks of age. Total feed conversion and relative growth rate were affected by levels. (p<0.05). Methods and levels showed significant effect on carcass composition (Protein, fat and ash percent). Methods and levels did not significantly affected drumstick and breast percent, and the amount of abdominal fat (due to carcass weight).
 
Keyword(s): BROILER CHICKEN, FEED RESTRICTION, COMPENSATORY GROWTH, CARCASS CHARACTERISTICS
 
References: 
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