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Subject: Animal Nutrition × Author: Koundal, Nitesh × Start date: 2019 ×
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    ThesisItemOpen Access
    Use of citric acid in combination with probiotics in broiler diets.
    (CSKHPKV, Palampur, 2019-07-04) Koundal, Nitesh; Katoch, Shivani
    The study was conducted to evaluate the effect of citric acid alone and in combination with commercial probiotics (Darolac) in the poultry broiler birds under completely randomized block design. For this purpose, day old broiler chicks (n=99) were divided into 3 main treatment groups T0, T1 and T2. Each treatment group was further divided into 3 replicates with 11 chicks each. T0 served as standard control diet and was given standard corn-soy flake based ration. Treatment T1 was given standard corn-soy flake ration with 0.5 per cent citric acid (CA) and T2 was given standard corn-soy flake ration with a combination of 0.5 per cent CA and 0.05 per cent probiotics. All three diets were formulated and prepared conferring to ICAR (2013) standards. Supplementation of test diet T1 alone was more effective than test diet T2 in enhancing bird performance in form of gain in weight and FCR by modulating the GIT environment condition viz. lowering the pH of intestinal contents, altering the population of intestinal microflora leading to reduction in the population of coliforms and altering the gram positive and gram negative bacteria ratio. Test diet T1 and T2 improved the digestibility of calcium and phosphorus which was reflected in increased Ca and P content in tibial bone. However carcass characteristics revealed 4.9 per cent higher dressing per cent in treatment T2 compared to control T0. Further, the average weight for fore/breast quarter was significantly (P<0.05) higher in treatment T2 and was numerically higher in treatment T1 compared to control T0. Blood cholesterol (mg/dL) was significantly (P<0.05) lower in treatment T2 compared to control T0. Economic analysis revealed 1.17 per cent higher gross profit on feeding test diet T1 compared to control diet T0, whereas test diet T2 increased the cost of feeding thus negatively affecting the profit margin compared to control T0. It is thus concluded that supplementation of CA alone at 0.5 per cent concentration in standard corn- soy flake ration is economically viable compared to combination of 0.5 per cent CA and 0.05 per cent probiotics.