Abdel-Kareem A A A, El-Sheikh T M
Department of Poultry Production, Faculty of Agriculture, Sohag University, Sohag, Egypt.
J Anim Physiol Anim Nutr (Berl). 2017 Jun;101(3):441-448. doi: 10.1111/jpn.12407. Epub 2015 Nov 28.
One hundred and twenty eight, 28-weeks-old Lohmann LSL hybrid layers were used in this experiment, which lasted 12 weeks to investigate the effect of propolis supplementation on the productive performance, egg quality traits and haematological variables of laying hens. All hens were randomly classified into four equal experimental groups, eight replicates (4 birds/each). Hens in group 1 were fed on a commercial diet and considered as control group, while those in groups 2, 3 and 4 were fed on the same commercial diet and supplemented with 250, 500 and 1000 mg propolis/kg diet. The obtained results revealed that daily feed consumption/hen increased insignificantly with increasing propolis level than that of the control group. Regarding the means of egg mass and egg production rate, it was observed that the laying hens fed diets containing 250 and 1000 mg propolis/kg significantly (p < 0.05) produced more and heaver egg in comparison with control group. External egg quality traits have not affected with increasing the level of propolis, while eggshell weight was significantly (p < 0.05) increased. The internal egg quality traits except albumen and yolk percentages increased significantly (p < 0.05) with increasing propolis level for treated hens as compared to those in the control. Concerning the haematological parameters, the results showed that the levels of total protein and globulin increased significantly with increasing propolis level, while cholesterol and liver enzymes were significantly decreased (p < 0.05). Heterophils count of hens in the treated groups significantly decreased, whereas the lymphocyte count significantly increased, resulting in a decreased H/L ratio than that of the control group. Thus, it could be concluded that the supplementation of 250 mg propolis/kg diet is highly recommended to improving egg production, blood constituent and haematological parameters of the commercial laying hens.
本实验使用了128只28周龄的罗曼LSL杂交蛋鸡，实验为期12周，旨在研究补充蜂胶对蛋鸡生产性能、蛋品质性状和血液学指标的影响。所有母鸡被随机分为四个相等的实验组，每组八个重复（每组4只鸡）。第1组母鸡饲喂商业日粮，作为对照组，而第2、3和4组母鸡饲喂相同的商业日粮，并分别添加250、500和1000毫克/千克日粮的蜂胶。结果表明，与对照组相比，随着蜂胶水平的提高，每只母鸡的日采食量增加不显著。关于蛋重和产蛋率的平均值，观察到饲喂含250和1000毫克/千克蜂胶日粮的蛋鸡与对照组相比，显著（p<0.05）产蛋更多、蛋更重。随着蜂胶水平的提高，鸡蛋外观品质性状未受影响，但蛋壳重量显著（p<0.05）增加。与对照组相比，处理组母鸡的内部蛋品质性状（除蛋白和蛋黄百分比外）随着蜂胶水平的提高而显著（p<0.05）增加。关于血液学参数，结果表明，随着蜂胶水平的提高，总蛋白和球蛋白水平显著增加，而胆固醇和肝酶显著降低（p<0.05）。处理组母鸡的嗜异性粒细胞计数显著降低，而淋巴细胞计数显著增加，导致H/L比值低于对照组。因此，可以得出结论，强烈建议在商业蛋鸡日粮中添加250毫克/千克蜂胶，以提高产蛋量、血液成分和血液学参数。
