Effect of feeding yeast culture on the performance of broilers
N.PANDA, A. RAJASHEKHER REDDY, G. V. N. REDDY
AND A .S. KESHAV REDDY
College of Veterinary Science
Acharya N. G Ranga Agricultural University
Effect of feeding yeast culture (NCIM 3190) on the performance of ninety-six one-day-old broiler chicks (3 groups with 4 replications) from 0-6 wk was studied. Dietary treatments include 1) Control (basal diet), 2) Basal diet + 0.1% yeast culture and 3) Basal diet + 0.2% yeast. Weekly feed intake and weight gains were recorded. Blood was collected at 0, 21 and 42 days to assess the biochemical profile. On 21 and 35 days both cell mediated and humoral response of the birds were studied through response to sheep red blood cells (SRBC) antigen and cutaneous basophilic layer sensitivity (CBH) response to mitogen, concanavalin A (sigma).
Feed intake was marginally increased in-group supplemented with yeast culture at 0.1% level but body weight gains were 4.25% higher with 2.8% less feed convention ratio compared to basal diet fed group. Yeast culture supplementation at 0.2% level had no beneficial effect. The serum biochemical profile (total protein, albumin, triglycerides, uric acid, creatinine and blood urea nitrogen) and serum enzymatic activity (alkaline phosphatase, AST, ALT and GGT) were not affected by supplementation of yeast culture in the broiler diets. The antibody production in response to SRBC was significantly (P<0. 05) higher in yeast culture supplemented diets. CBH response was also significantly (P<0. 05) higher on yeast culture supplemented diets. These results indicate that supplementation of yeast culture increased the immune response of the birds. Further, supplementation of yeast culture at 0.2% level had no advantage over 0.1% level.