the effect of different levels of dietary energy and protein on performance and blood factors in japanese quail
نویسندگان
چکیده
the present study was conducted to evaluate the effect of feeding of different levels of metabolizable energy and of different crude protein levels on the performance and blood factors in japanese quails in their 5 to 41d old. the experiment was conducted as a 3×5 factorial arrangement, in a completely randomized design of four replicates with 40 quails per replicate. the fifteen dietary treatments consisted of three levels of dietary energy (2800, 2900 and 3000 kcal me kg−1) times five levels of crude protein (22, 23, 24, 25 and 26%). blood samples were collected towards the end of the study to determine thyroxine (t4), triiodothyronine (t3) and cholesterol content. there was no interaction observed between the two factors (p>0.05). daily weight gain of quails fed diets containing 3000 kcal me kg−1 was significantly higher than thoseted at the other levels (p< 0.001). also, final body weight increased with increasing me level (p 0.05). t4 concentration for males fed 3000 kcal me kg−1 diet was significantly higher than t4 in the other two treatments level (p
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عنوان ژورنال:
علوم دامی ایرانجلد ۴۴، شماره ۴، صفحات ۳۲۱-۳۲۷
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