TY - JOUR T1 - Effects of Dietary Crude Protein and Supplemental Lysine Levels on Broiler Chickens Performance, Carcass Characteristics and N Excretion TT - تأثیر سطوح مختلف مکمل لیزین و پروتئین خام جیره بر عملکرد، خصوصیات لاشه و دفعازت جوجه‌های گوشتی JF - JSTNAR JO - JSTNAR VL - 9 IS - 4 UR - http://jstnar.iut.ac.ir/article-1-510-en.html Y1 - 2006 SP - 171 EP - 180 KW - Lysine KW - Protein KW - Broiler KW - Carcass KW - Breast meat. N2 - An experiment was conducted with the male Ross broiler chicks from 1 to 42 days of age to test the effects of different dietary protein and lysine levels on performance, carcass characteristics, and N excretion. Treatment diets consisted of three levels of supplemental lysine in starter and grower period (0, 0.15, and 0.30 %) and the two levels of protein (20.84, 17.84 in starter, and 18.12, 16.12% in grower period) with 2900 Kcal ME/kg diet. The results indicated that the Reducing dietary protein decreased significantly the weight gain in starter, grower, and total period up to 6, 4.6, and 5.6%respectively (P M3 ER -