Abstract：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 with 5 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 performance and nutrient apparent digestibility of broilers were determined. The results showed as follows:1) the average daily gain of broilers in the group with amylose/amylopectin of 0.23 significantly increased (P<0.05), and the feed/gain was the highest in the group with amylose/amylopectin of 0.47 (P<0.05),the other groups were not significantly different (P>0.05); the addition of 6 000 U/kg amylase in the diets significantly reduced the average daily gain of broilers (P<0.05), but the effect on the feed/gain was not significant (P>0.05); the interaction effect was not significant (P>0.05). 2) The apparent digestibility of energy, crude protein, dry matter, crude fat and calcium were the highest in the group with amylose/amylopectin of 0.11 (P<0.05), and the lowest in the group with amylose/amylopectin of 0.47 (P<0.05); the addition of amylase in diets had no significant effect on nutrient apparent digestibility (P>0.05); the interaction effect had significant effect on nutrient apparent digestibility (P<0.05). In conclusion, feeding diets with amylose/amylopectin of 0.23 and amylase addition of 3 000 U/kg can improve the growth performance of broilers.
马杰, 杨泰, 杨媚, 陈清华, 刘伟. 饲粮直链/支链淀粉和淀粉酶对肉鸡生长性能的影响及其互作效应研究[J]. 动物营养学报, 2019, 31(7): 3086-3094.
MA Jie, YANG Tai, YANG Mei, CHEN Qinghua, LIU Wei. Effects of Dietary Amylose/Amylopectin and Amylase on Growth Performance of Broilers and Their Interaction Effect. Chinese Journal of Animal Nutrition, 2019, 31(7): 3086-3094.
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