Desai, M. C.Patel, Krushnarvind B.2018-06-152018-06-151998http://krishikosh.egranth.ac.in/handle/1/5810053388The effect of addition of enzyme on efficiency of Prosopis juliflora pods based feed utilization by'broilers, was planned using 400 unsexed 'Hubbard commercial chicks from day old to six weeks of age. The five treatments were T1 (diet without Prosnpis juliflora pods but with enzymes), T2 (diet having 5% Prosopis juliflora pods with enzyme), T3 (diet having 10% Prosopis juliflora pods with enzyme), T4 (diet having 10% Prosopis juliflora pods without enzyme) and T5 (control diet without enzyme). Completely randomized design was followed. The nutrient requirements were met as per the recommendations of BIS (1992a,b) feeding standards. The feeds were supplemented with coccidiostats and vitamins and birds were vaccinated as per schedule. Five rations were fed from 0-4 weeks in cages and 5-6 weeks of age on deep litter. The average initial weight of the broiler chicks were 50.41 + 0.09, 50.38 ± 0.05, 50.05 ± 0.02, 50.30 ± 0.18 and 50. 1 ± 0.08 g followed by 1783.82 ± 42.89, 1708.26 ± 25.47, 1624.96 ± 33.72, 1586.10 ± 46.67 and 1664.82.22.30 g average total weight at the end of experiment and average weight gain was 1733.40 + 38.30, 1657.91 ± 25.49, 1574.91 + 33.71, 1535.80 + 46.32 and 1614.70 + 22.37, respectively under T1, T2, T3, T4 and T5 treatment groups. The treatment group differed significantly (P<0.05) where the gain in body weight was highest in T1, followed by.T2, T5, T3 and the least in T4 group. Non-significant average feed consumption for 0-4 weeks (1463.53 ± 14.46 - 1521.93 ± 12.49 g/bird) and for 5 to 6 weeks (1798.93 ± 32.96 - 1909.13 ± 37.15 g/bird) suggested that Prosopis juliflora pods at 10% level is quite palatable to broilers during starter as well as finisher phase of growth. The numerical reduction in feed consumption was observed with enzyme addition which might be due to improved utilization of Prosopis juliflora pods by enzyme and on account of more energy available to the birds.enANIMAL NUTRITIONA STUDYThesis