Abstract

This research aimed to investigate the effect of varying dietary crude protein (CP) and metabolizable energy (ME) quantity on growth, carcass characteristics, biochemical blood parameters and molecular aspects of growing geese. Overall, a total of 180 Egyptian goslings were used in a 2 × 3 factorial design. Two levels of CP (18% and 16%) and three levels of ME (3000, 2900 and 2800 kcal/kg diet) were employed. Growth traits showed no significant differences as a result of different CP or ME levels. Birds fed the higher CP level consumed more feed than the lower. Carcass, dressing, heart, spleen, abdominal fat and thigh percentages within the group fed 18% CP were higher than the other group. Compared with the other ME-based diet, geese fed a low-ME based diet had the highest heart percentage. Feeding growing geese on a 2900 Kcal/kg ME-based diet increased the serum content of total protein and globulin. Geese fed the high-ME diet showed the highest levels of ALP and C4 as compared with other ME levels. Regarding Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), different protein and energy levels did not affect the molecular weight of blood proteins of Egyptian geese during the growing phase. It could be concluded the levels of 16% CP and 2800 kcal/kg ME are enough to maintain the growth performance and the other physiological indices as well as molecular aspects.

摘要

本研究旨在调查不同日粮粗蛋白 (CP) 和代谢能 (ME) 数量对生长鹅的生长、胴体特征、生化血液参数和分子方面的影响。总体而言，在 2 × 3 因子设计中总共使用了 180 只埃及小鹅。使用了两个水平的 CP（18% 和 16%）和三个水平的 ME（3000、2900 和 2800 kcal/kg 饮食）。由于不同的CP或ME水平，生长性状没有显着差异。饲喂高 CP 水平的鸡比低水平的鸡消耗更多的饲料。饲喂 18% CP 组的胴体、敷料、心脏、脾脏、腹部脂肪和大腿百分比高于另一组。与其他基于 ME 的饮食相比，饲喂低 ME 饮食的鹅的心脏百分比最高。以 2900 Kcal/kg ME 为基础的日粮喂养正在生长的鹅增加了总蛋白和球蛋白的血清含量。与其他 ME 水平相比，饲喂高 ME 饮食的鹅显示出最高水平的 ALP 和 C4。关于十二烷基硫酸钠-聚丙烯酰胺凝胶电泳（SDS-PAGE），不同的蛋白质和能量水平对埃及鹅生长期血液蛋白的分子量没有影响。可以得出结论，16% CP 和 2800 kcal/kg ME 的水平足以维持生长性能和其他生理指标以及分子方面。不同的蛋白质和能量水平不影响埃及鹅在生长期血液蛋白质的分子量。可以得出结论，16% CP 和 2800 kcal/kg ME 的水平足以维持生长性能和其他生理指标以及分子方面。不同的蛋白质和能量水平不影响埃及鹅在生长期血液蛋白质的分子量。可以得出结论，16% CP 和 2800 kcal/kg ME 的水平足以维持生长性能和其他生理指标以及分子方面。