THE INFLUENCE OF FEED PROTEIN LEVEL ON PRODUCTIVE PERFORMANCES AT ROSS 308 HYBRID INFLUENŢA NIVELULUI PROTEIC AL RAŢIEI ASUPRA PERFORMANŢELOR PRODUCTIVE LA HIBRIDUL ROSS 308
Few years ago our country start breeding broiler hybrids due to the high growing performances. In our experiment the influence of protein ration level on growing performances and slaughter yield hybrid Ross 308, were performed. The two experimental lots were keeping in optimum microclimate condition in unprotected cage, on soil on permanent layer and having different protein level ration. For obtaining the information regarding the average gain the chicken were weighing weekly and the feed
... y and the feed quantity ingested were periodical weighing. The L1 group received a high protein level ration content compared with L2 group. During the all experiment period the highest weighing gain on group L1, were observed. At the end of the experiment the average gain for the chicken from L1 group were 2555,2 g with a feed conversion of 1,96 kg feed / kg gain and for L2 group were 2099,6g with a feed conversion of 2,14 kg feed / kg gain. The highest slaughter yield values (69, 67 % at warm and 65,6 % after 24 h of refrigeration) for the group L1, were observed.