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International Journal of Poultry Science

Influence of Dietary Enzymes Prepared at Ensiling (ZADO®) from Hatch to 42 Days of Age on Productivity, Slaughter Traits and Blood Constituents in Broiler Chickens

H.M. Safaa
Department of Animal Production, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
Abstract :

Four hundred Cobb-500 broiler chicks at one-day old were used to study the effects of exogenous xylanases, cellulases, protease and alpha-amylase enzyme preparations at ensiling (ZADO®) on the productive performance, slaughter traits and blood metabolites. Chicks were divided randomly into 4 treatments (broiler basal diets supplemented with 0, 2, 4 and 6‰ with ZADO®) and housed on deep litter at an open house system under commercial conditions. Each treatment replicated 4 times (30 chicks per replicate). Basal diet contained 23.1% CP and 3,103 kcal AME/kg for the starter diet (0-21 d) and 20.0% CP and 3,207 kcal AME/kg for the finisher diet (21-42 d). Results indicated that broiler productivity improved in response to dietary 4 or 6‰ ZADO®. Feed conversion ratio was 1.948, 1.903, 1.758 and 1.678 for birds fed diet supplemented with 0, 2, 4 and 6‰ ZADO® (p = 0.0007), respectively. In addition, birds fed diet supplemented with 6‰ ZADO® recorded higher dressing and immune organs relative weights at 42 days of age than other treatments (p<0.05). Moreover, enzyme supplementation increased significantly plasma total protein (p = 0.0040) and globulin (p = 0.0131) at 42 days of age. Also, dietary 6‰ ZADO® decreased plasma cholesterol (p = 0.0466) and increased HDL-:Total-cholesterol ratio (p = 0.0040). It could be concluded that ZADO® supplementation to broiler diets improved broiler productivity and might improve immunity. Moreover, dietary 6‰ ZADO® has a favor effects on lipid metabolism. It could be recommended from this study to supplement 4‰ or more of ZADO® to broiler diets up to 42 days of age.

Keywords :
ZADO enzyme co mplex, broiler performance, slaughter traits, blood biochemical characteristics

Date Deposited : 19 Mar 2015 10:16

Last Modified : 19 Mar 2015 10:16

Official URL:

Volume 12, Number 9, - 2013 , ISSN 1682-8356

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