EFFECT OF ADDITION OF PROBIOTICS TO DIETS FOR DIFFERENT PERIODS performance OF BROILER ON PRODUCTIVE PERFORMANCE

Abstract

The objective of this study is to investigate the effect of adding constant levels of probiotics ( BIOS B-Gold ) Korean origin 1 gm probiotics / Kg diet for different perioed of birds life on productive performance of broiler by using 72 unsexed Ross/Turkish one day age broiler chicks bring from local hatcheries(Aljazera hatcheries) . the birds were randomly distributed to four treatments in column batteries with three replicates per treatment (6chicks/replicated). Probiotics supplemented into ration from the fourth day until the end of experiment in level 0 gm probiotics /Kg diet(T1) ،1 gm probiotics /Kg diet (T2 T3 T4) respectively for different period to the end of experiment (42 day). The statistical analysis of the results showed that birds in T1 had significantly (P≤0.01) increased in body weight gained trait at the age of 21 days and ،T1 and T4 were significantly (P≤0.01) increased at 42 day ، Food consumption was significantly (P≤0.01) increased in T1 when compared with T2 ،T3 at the age of 21 days ،while at 42 day of age T1 and T3 were significantly (P≤0.01) increased compared with T2 and T4. We conclude that the probiotics (( BIOS B-Gold ) has no effects on productive performance.