EI-Moniary,, M., kutkat, M. (2003). COMPARATIVE STUDY ON THE EFFECT OF PROBIOTICS, ENZYMES, ACIOIFIER OR ANTIBIOTIC GROWTH PROMOTERS ON PERFORMANCE AND IMMUNE RESPONSE OF BROILER CHICKS IN COMMERCIAL SCALE PRODUCTION.. Journal of Animal and Poultry Production, 28(11), 6599-6608. doi: 10.21608/jappmu.2003.246130
M. M. A. EI-Moniary,; M. A. kutkat. "COMPARATIVE STUDY ON THE EFFECT OF PROBIOTICS, ENZYMES, ACIOIFIER OR ANTIBIOTIC GROWTH PROMOTERS ON PERFORMANCE AND IMMUNE RESPONSE OF BROILER CHICKS IN COMMERCIAL SCALE PRODUCTION.". Journal of Animal and Poultry Production, 28, 11, 2003, 6599-6608. doi: 10.21608/jappmu.2003.246130
EI-Moniary,, M., kutkat, M. (2003). 'COMPARATIVE STUDY ON THE EFFECT OF PROBIOTICS, ENZYMES, ACIOIFIER OR ANTIBIOTIC GROWTH PROMOTERS ON PERFORMANCE AND IMMUNE RESPONSE OF BROILER CHICKS IN COMMERCIAL SCALE PRODUCTION.', Journal of Animal and Poultry Production, 28(11), pp. 6599-6608. doi: 10.21608/jappmu.2003.246130
EI-Moniary,, M., kutkat, M. COMPARATIVE STUDY ON THE EFFECT OF PROBIOTICS, ENZYMES, ACIOIFIER OR ANTIBIOTIC GROWTH PROMOTERS ON PERFORMANCE AND IMMUNE RESPONSE OF BROILER CHICKS IN COMMERCIAL SCALE PRODUCTION.. Journal of Animal and Poultry Production, 2003; 28(11): 6599-6608. doi: 10.21608/jappmu.2003.246130
COMPARATIVE STUDY ON THE EFFECT OF PROBIOTICS, ENZYMES, ACIOIFIER OR ANTIBIOTIC GROWTH PROMOTERS ON PERFORMANCE AND IMMUNE RESPONSE OF BROILER CHICKS IN COMMERCIAL SCALE PRODUCTION.
1Animal Production Dept., National Research Center-Dokki. Cairo
2Parasitology and Animal Diseases Dept., National Research Center. Dokkl. Cairo.
Abstract
An experiment was conducted to study the effect of using probiotics, enzymes . acidifiers ,or antibiotics in broiler diets against negative control ( with no supplemental growth promoters ) on growth performance and immune response of Arbor - Acres broiler chicks from 0 - 6 weeks of age. Fifteen thousand (15000) day - old broiler chicks were randomly divided into five experimental treatment groups with two replicates each . The different experimental diets were lso-rtutritlve and contained 21% crude protein and 2950 Kcal ME/Kg feed during the first four weeks of age ( starter (grower period) and contained 17.5% crude protein and 3000 Kcal MElKg feed during the last two weeks of age (finisher period) .
At the end of starter I grower period, weight gain and feed conversion values of chicks fed diets supplemented with different growth promoters were approximately similar to those recorded by chicks fed control diet. At the end of experiment (6 weeks), the values of weight gain, feed conversion, performance Index and carcass characteristics of birds fed diets containing either probioncs, enzymes. acidifiers or antibiotics had also no significant differences as compared with those fed the control diet. The use of these growth promoters reduced the relsolation percentage of E. coli and proteus organisms from liver and intestine if compared with control group.
The geometric mean titre against Newcastle disease virus was highly in birds which received probiotlcs followed by those having acidifier and enzymes if compared with other groups.
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