تاثير استفاده از سطوح افزايشي گاودانه خام و عمل آوري شده بر عملكرد جوجه هاي گوشتي

Effect of feeding cumulative levels of raw and treated Vicia ervilia (Bitter vetch) on the performance of broiler chickens

This experiment was conducted to study the effect of feeding raw and treated bitter vetch using a completely randomized design with 10 treatment and 4 replicates on performance of broiler chicks. Four hundred and eighty day-old broiler chicks were placed in 40 experimental units (twenty in each unit). Treatments were included a corn-soybean based diet as control, raw bitter vetch, soaked in water for 72 h with exchanged of water every 12 h and dried (SD), soaked in water for 12 h, autoclaved (120°C, 20 min) and dried (SAD) in three levels containing 5 , 10 and 15% in starter (0-21d), 10 , 15 and 20% in grower (21-42d) and 15 , 20 and 30% in finisher (42-49d) periods. Feed intake, daily weight gain and feed efficiency ratio (FER) were not affected by feeding of bitter vetch during 0-21 d period. Chicks raised with diets include 20% SD, 15 and 20% raw bitter vetch in during 0-42d and 30% SAD, 30% SD, 20 and 30% raw bitter vetch during 0-49d periods had a lower feed intake than control group (P<0.05). Daily weight gain and body weight were significantly lower in all treatments in comparision to control group at 42 and 49 days of age (P<0.05). Feeding diets containing 20% SD, SAD and raw bitter vetch at 42 days and all bitter vetch treatments in total experimental period (0-49d) significantly increased FER (P<0.05). Carcass yield was not affected by diets include 15 and 20% SAD and also 15% raw bitter vetch. In all levels of SAD and 30% SD bitter vetch liver weight was higher in comparision to control diet (P<0.05). Pancreas weight was significantly higher in 30% SD bitter vetch in comparision with control diet (P<0.05). Moreover, treatments had no significant effects on relative percentage of abdominal fat at 49 days of age. the results showed if there is an economical explanation, we can include leveles of 5, 10 and 15% of SAD and raw bitter vetch in starter, grower and finisher diets of broiler chicks, respectively.