AThe purpose of this research trial was to study the effect of form of feed and dietary supplementation of phytase and vitamin 1)3 on phytate utihzation. growth performance, minerals (calcium and phosphorus) and nitrogen retention in broilers. I he findings of this study on the above mentioned parameters have been discussed as under in the light of the available literature.
One hundred and eighty day-old broiler chicks were purchased from local market. The
chicks were weighed on the first day and then randomly divided into 6 groups of 18 replicates. [here were ten chicks in each replicate. Six isocaloric (M[ 2750 Real/kg) and isonitroginous
(CP% 19) broiler starter rations (A, B, C, 1), E and F) were formulated. Similarly six isocaloric (ME 2850 kcal/kg) and isonitroginous (CP% 18) broiler finisher rations (A, B, C, D, E and F)
were formulated. Ration A and ration B was control but ration A was in mash form and ration B in the Form of pellets. Rations C and I) were Formulated in mash form with phytase (Phyzyme XP 10000 LV!) 500 FlU/Kg along with 1, 25(OH) 2 1)3 a' 2000 and 3000 lU/Kg
respectively. Rations E and F were formulated in pellets form with phytase (Phyzyme XP 10000 TPT) @ 500 FTU/Kg along with 2000 and 3000 lU/Kg of 1, 25(OH) 2 D3 respectively. Starter diets were fed I to day 28 and finisher diets were led from day 29 th to 42 Ui day. All the birds were provided ICed and water ud-/ibiluin and were provided with 24 hours light. The parameters defined for study were feed intake, weight, FCR, dressing percentage, toe ash percentage, calcium and phosphorus in toe ash and excreta, nitrogen retention and economics. The data was subjected to statistical analysis and differences among treatment means were analyzed through l)MRl lest.

The results indicated average feed intake that highest feed intake was found in group F (D3 3000 lU/kg and phytase 500 units/kg) and E (1)3 2000 lU/kg and phytase 500 units/kg,) which were in pellet form respectively. The statistical analysis showed significant difference (P<0.05) in feed intake of the birds fed diets in pellet and mash form containing varying levels of D3 and phytase level. The lowest feed intake was found in group A (control, 0 phytase and 0 D3 level) which was in mash form. The maximum average weight gain was in the birds fed diets containing phytase 500 units/kg and vitamin D3 containing 2000 and 3000 units/kg in group F and F in pellet form respectively, while minimum weight gain was in the birds fed diets containing no phytase and vitamin D3 ( group A in mash form). The statistical analysis showed significant difference (P<0.05) in weight gain of the birds fed diets containing varying levels of phosphorus. 1)3 and phytase (a) 500 units with pellet and mash form. Ihe poor FCR was found in group F and best ICR was observed in group E. The statistical analysis showed non-significant difference (P<0.05) in feed conversion ratio of the birds of all the groups. The highest dressing percentage was observed in group F (phytase S00units/kg and vitamin D3, 3000 units/kg) in pellet form followed by group 13 (control. pellet) and F (phytase S00units/kg and vitamin 1)3, 2000 units/kg). The lowest dressing percentage was observed group A (control, mash).A significant difference was found between dressing percentage of all the groups (P<0.05).
Statistical analysis showed non-significant difference between all the groups (P<0.05). Highest toe ash percentage was observed in group D (phytase So0units/kg and vitamin D3, 3000 units/kg) in mash form) followed by group A. C and F. The lowest toe ash percentage was found in group F. The statistical analysis showed non-significant difference among all the groups (P<0.05). The highest phosphorus in toe bone was in group D followed by F and F and lowest phosphorus was found in group A. The results showed that non-significant difference was found between all groups (P There was non-significant difference between all the groups (P