تأثير مصدر الدهن المضاف في العلائق الناهية لفروج اللحم على بعض الصفات الإنتاجية و سرعة مرور الغذاء في القناة الهضمية

Abstract EN

This experiment was conducted on 72 hubbard birds (4- 8) week to study the effect of fat source in the finisher ration of broiler.

The birds were divided into four treatments iso energetic (3000 Kcal / Kg) and protein (18 %) each consist of 9 replicates with 2 birds raised in cages.

The experimental treatment were as follow : (1) control without added fat, (2) 3 % added vegetable fat (3) 3 % added vegetable oil (4) 3 % added animal tallow.

The results showed that The experimental treatments have no significant effect on live body weight, daily weight gain, relative growth rate, dressing percentage, percentage of carcass parts and edible giblets, while there was a significant difference in feed and protein consumption in all periods except 6-7 weeks and in feed and protein conversion ratio in 5-6 weeks only.

There was non-significant increase in intestine and ceca length in added fat treatments as comparing with control.

The second treatment was less in feed passage time comparing with other treatments.

Added fat treatments were less economic efficiency than the control.