Impacts of Enzymes and Probiotic in Improving the Utilization of Sieved Olive Pulp Meal on Productive Performance of Laying Hens
Impacts of Enzymes and Probiotic in Improving the Utilization of Sieved Olive Pulp Meal on Productive Performance of Laying Hens
Abd-Alfattah Abd-Alhamid Alderey1, Nabila Elsaid Mahmod El-Kassas1, Eman Said El-Hadad1*, Manal Hamdy Gomaa1, Eman Ashour Hussein2
ABSTRACT
Nutritionists try to find suitable and cheap alternatives to replace traditional feed ingredients, which are also food items for humans. This study aimed to evaluate the effect of incorporation of sieved olive pulp (SOP) treated with Econase (E), dry yeast (DY), or both on productive performance of laying hens. Total of 147 Mandarah laying hens (28-week old) were assigned to seven groups. The first group was fed a control diet, while six treatment groups were fed diets containing 15 or 20% SOP with Econase (0.1g/kg), DY (0.3g/kg), or both. The tested diets were isonitrogenous and isoenergetics (16% CP and 2750 kcal ME/kg). During a feeding period from 28 to 40 weeks of age, growth performance and egg production of hens were determined, and blood samples were taken for hematological and biochemical assays. Results showed significant (P<0.001) increase in feed intake with all SOP diets compared with controls. Feed conversion ratio was improved (P<0.05) in response to feeding hens on the diet containing SOP15%+E compared to control. Number, daily mass, and production rate of eggs were increased (P<0.001) by SOP15%+E and SOP20%+E or DY. Egg shape index and plasma cholesterol and triglyceride were improved (P<0.05 or P<0.001) by all SOP20% diets. Shell percentage was increased (P<0.01) by SOP20%+E+DY. Haugh unit was increased (P<0.01) by SOP15%+E or E+DY, SOP20%+E+DY. Egg surface area was improved (P<0.05) by SOP15%+E or DY, SOP20%+DY. SOP20%+DY diet showed the highest economic efficiency relative to the control followed by SOP15% or SOP20%+E diets. Overall, results demonstrated that sieved olive pulp could be incorporated in the diets of Mandarah laying hens up to 15% with Econase or 20% with Econase or dry yeast to improve productive performance, egg production, and economic feed efficiency.
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