author(s)
Hasan SA Jawad

abstract
During the recent years, probiotic has been presented with great growth promoters in chicken production. Thus, the present experiment was carried out to evaluate the anatomical changes of males Akar Putra chicken digestive organs fed on a prepared probiotic (PP) in different supplementing style. The experiment comprised of 10 treatments (24 chicken/treatment), with 3 replicates of each (8 chicken/replicate). The treatments consisted of a control group (T1), PP added to the daily drinking water at the rate 1:1 (1 liter tap water+1g PP) in A1 and 1:2 in A2. PP was added to the diet at the rates 1:1 and 1:2 (1 kg of commercial broiler feed+1, 2 g PP) in T4 and T5, respectively. Furthermore, birds in T6 and T7 were fed on a dry fermented diet with probiotic at the rates 1:1:1 (1 kg of commercial broiler feed+1 liter tap water+1 g PP) and 1:1:2, respectively. Whereas, fermented feed with probiotic in the same previous rates but without drying used to feed the birds in T8 and T9. Birds in T10 were fed on a moist diet at the rate 1:1 (1 liter tap water+1 kg of commercial broiler feed). The results presents that PP treatments had (p<0.05) longer esophagus 10-25%, duodenum 25-38%, jejunum 9-70%, ilium 2-64%, cecum 5-31% and colon 7-34% and Total 7-47% than the control group counterparts. In contrast, total GIT weight were 8 to 50% (p>0.05) heavier in PP treatments, mainly in the proventriculus and gizzard. In conclusion; the results of current study investigated that using probiotic especially in daily drinking water at rate 1:2 had positive effects on the anatomical observations of most gastrointestinal parts.