The purpose of this experiment was to study the effects of amylose/amylopectin and amylase on growth performance and nutrient apparent digestibility of broilers. The experiment used a 4 × 3 two factor design,and a total of 960 Arbor Acres( AA) broilers at 1 day of age were randomly divided into 12 groups with5 replicats in each group and 16 broilers in each replicat. The dietary amylose/amylopectin were 0.11,0.23,0. 35 and 0.47,and the addition amounts of amylase were 0,3 000 and 6 000 U/kg,respectively. The test period was 21 d,and the growth...