performance of broiler fed by autoclaved common vetch seed

this experiment was conducted to study of using different level and treatments of common vetch (visia sativa) on broiler performance in a completely randomized design with 10 treatments, 4 replications and 10 chicks in each, using 400 cobb500 broiler chicks. treatments were: corn-soybean meal based diet as control , and unprocessed or processed common vetch seed (water or autoclaving) each at 3 levels : 10, 20 and 30 percent. all rations were isocaloric and iso nitrogenous. results showed that, use of more than %10 raw vetch decreased body weight and weight gain significantly(p<0.01). processing of raw common vetch seed increased level of usage so that using %20 of it processed with water or autoclaving had  equal effect with the control diet. as the level of vetch seed increased in the diets, feed intake significantly decreased and effect of processing on feed intake was significant(p<0.01). feed conversion efficiency was increased with the  level of vetch seed in the diets significantly(p<0.05) processing methods had not effect on it. the experiment results indicates that the vetch seed can be used up to 10% as  raw or 20% as treated with water or autoclaving in broiler diets without any adverse effects.