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Effect of feeding different levels of energy and protein on performance of Aseel breed of chicken during juvenile phase

机译：饲喂不同水平的能量和蛋白质对雏鸡Aseel品种繁殖性能的影响

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A study was conducted to evaluate the effect of feeding different metabolizable energy (ME) and crude protein (CP) levels on performance of Aseel chicken during 0 to 8 weeks of age (Juvenile phase). At 1 day old, 432 chicks were randomly distributed into nine groups. Each group had 48 chicks distributed into eight replicates with six birds in each. Maize-soybean meal-based diets with three ME levels (2,400, 2,600 and 2,800 kcal/kg) and three CP levels (16%, 18% and 20%) were fed to birds in a 3 x 3 factorial design. Different ME levels had significant effect on body weight gain (BWG), feed intake and feed conversion ratio (FCR). Birds fed diet with 2,400 kcal/kg ME had significantly lower BWG (P < 0.004), lower shank length (P < 0.0007), higher feed intake (P < 0.0001) and poor FCR (P < 0.0001) than those fed diet with either 2,600 or 2,800 kcal/kg ME. Energy efficiency ratio was not influenced by ME, CP or their interaction. However, protein efficiency ratio was significantly higher at higher ME levels and lower at higher CP levels. There was significant effect of ME, CP and their interaction on serum protein and cholesterol levels. However, they made no significant effect on antibody titre against New Castle disease vaccine. The study concluded that provision of 2,600 kcal/kg ME and 16% CP would be ideal for optimum growth of Aseel birds during juvenile phase. However, to obtain better FCR, feeding Aseel birds with diet having 2,800 kcal/kg ME and 16% CP would be ideal.
机译：进行了一项研究，以评估饲喂不同代谢能（ME）和粗蛋白（CP）水平对0至8周龄（幼年期）Aseel鸡的生产性能的影响。在第1天大时，将432只小鸡随机分为9组。每组有48只小鸡，分成8个重复，每只有6只。以3 x 3因子设计向禽类饲喂玉米-豆粕基日粮，其中三个ME水平（2,400、2,600和2,800 kcal / kg）和三个CP水平（16％，18％和20％）。不同的ME水平对体重增加（BWG），采食量和饲料转化率（FCR）有显着影响。饲喂2400 kcal / kg ME的家禽的BWG（P <0.004），小腿长（P <0.0007），饲喂量（P <0.0001）和FCR（P <0.0001）均显着低于饲喂两种饲料的家禽2,600或2,800 kcal / kg ME。能效比不受ME，CP或其相互作用的影响。然而，蛋白质效率比在较高的ME水平下显着较高，而在较高的CP水平下较低。 ME，CP及其相互作用对血清蛋白和胆固醇水平有显着影响。但是，它们对新城疫疫苗的抗体滴度没有明显影响。研究得出结论，提供2600 kcal / kg ME和16％CP对于幼年期Aseel禽类的最佳生长是理想的。但是，为了获得更好的FCR，以2800 kcal / kg ME和16％CP的饮食喂养Aseel禽是理想的。

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