No abstract

No abstract

No abstract

An experiment was conducted to evaluate the effects of dietary inclusion of (multi-enzymes) maxi-zyme at different energy and protein level on performance of egg-type chicks during hot-dry summer. After feeding a standard diet from 0-21d of age, the chicks were randomly distributed into four dietary treatment groups viz., T 1 with high energy 2800 kcal ME kg-1 and high protein 18.0% (HEHP), T2 HEHP diet with maxi-zyme 0.025% and T 3 with low energy 2700 kcal ME kg-1 low protein 17.34% (LELP) and T4 with LELP diet with maxi-zyme 0.025%. Each treatment is with fifty birds divided in five replicated of ten birds each. Experiment was carried out during hot-dry summer (April-May, 28.0±0.12 oC to 35.25±0.37 oC and RH %: 68.95±0.90 to 79.15±0.61). Production performance, immune organ weight, blood biochemical and intestinal morphometry were measured at 42 nd and 63 rd day post hatch. Body weight gain, Feed intake and FCR improved significantly (P<0.05) in HEHP+maxi-zyme group. H:L ratio significantly (p<0.05) reduced in maxi-zyme supplemented group at 42 nd as well as 63 rd day of age. Immune organ like thymus, spleen and bursa had significantly (p<0.05) higher weight in maxi-zyme supplemented group. Total protein (p<0.001), SGOT (p<0.001), SGPT (p<0.001), creatinine (p<0.05) were significantly improved while cholesterol, uric acid & ALP was significantly (p<0.001) reduced in maxi-zyme supplemented diets. Villus height & crypt depth improved significantly (p<0.001) in maxizyme supplemented group at 42 nd as well as 63 rd day of age. Thus, it was concluded that high-energy (2800 kcal ME kg-1) and high protein (18% CP) diet was beneficial for egg type starting chicks during dry summer. Moreover, the inclusion of maxi-zyme @ 0.025% gave further advantage to improve performance and reduce thermal stress.