Effect of barley feeding with or without enzymes on broiler performance
P.YADAV¹ AND D. PRASAD²
1Deptt. of Animal Nutrition
2Deptt. of Vety. Clinical Medicine
CCS Haryana Agril. University, Hisar - 125004
Day-old broiler chicks (n=350) were randomly divided in to 14 groups of 25 chicks each. Seven dietary treatments (maize-groundnut cake based control diet-D1 and 6 test diets incorporating barley at 25,50 and 100% of maize in diets D2-D4 on weight basis and addition of a multi-enzyme @ 75 g/qt. in the test diets D5-D7) were formulated for 0-4 weeks starting and 4-6 week finishing period. Each dietary treatment was offered to two groups of broilers reared on deep litter from day-old to 6 weeks of age. All the birds received similar management practices except the dietary treatment. The feed intake and body weight gains were recorded bi-weekly. A metabolic trial was also conducted during sixth week of age to assess the energy metabolizability and nitrogen retention of the broilers. At the end of the trial, four birds were randomly selected from each treatment and scarified to evaluate carcass traits. Results indicated that barley could be used at lower level in broiler diet replacing not more than 25% of maize with multi-enzyme supplementation @ 75g/qt. Critical analysis of results revealed that the test cereal barley depressed growth in starting phase when used at higher level. But had little growth depressive effect during finishing phase. Thus, barley can safely be used in part (about 15% w/w in diet) replacing 25% of maize in the diet of broiler chicken with multi-enzyme supplementation.