TY - JOUR JF - JSTNAR JO - jwss VL - 10 IS - 4 PY - 2007 Y1 - 2007/1/01 TI - Effect of Different Levels of Energy and Protein on Laying Performance of Fars Native Hens During the First Phase of Production TT - اثر سطوح مختلف انرژی وپروتئین جیره بر عملکرد تخم‌گذاری مرغ‌های بومی استان فارس در مرحله اول تخم‌گذاری N2 - An experiment was carried out to investigate the effects of different levels of energy (2700, 2900 and 3100 kcal/kg) and protein (13, 14.5 and 16 %) on laying performance of Fars native hens during the first phase of production. Two hundred and sixteen 25-week-old native pullets were put into fifty four groups of similar live weight (994 ± 169 gr) of four chickens, which were randomly allocated to nine experimental diets. Each treatment was replicated six times in factorial CRD design (3×3). At each level of energy, three diets were formulated to contain three levels of protein (16, 14.5 and 13%). The diets were fed ad libitum for a period of 20 weeks (week 25-45). The treatments 1 with 3100 kcal/kg ME and 16% protein and 3 with3100 kcal/kg ME and 13% protein had less daily feed consumption than treatment 7 with 2700 kcal/kg ME and 16% protein (90.50 and 87.30 vs 101.20 gr respectively, P SP - 447 EP - 460 AU - M. Arab Abousadi, AU - E. Rowghani, AU - M.J. Zamiri, AU - M. Abdolhoseinzadeh, AD - KW - Fars native hen KW - Energy KW - Protein levels. UR - http://jstnar.iut.ac.ir/article-1-635-en.html ER -