关键词: SPF鸭, 饲养方式, 生长性能

Abstract: Objective　The experiment aimed to analyze the effects of the two feeding modes on the breeding effect of SPF ducks by comparing the growth of body weight, body slant length, chest depth, chest width and keel length, so as to provide reference for the large-scale production of SPF ducks in the future.Methods　One hundred and twenty healthy 1-day-old SPF ducks were divided into 2 groups, with 3 replicates in each group and 20 ducks in each replicate. The first group was fed with isolator (internal air cleanliness level 5), which was referred to as isolated environment feeding group, and the second group was fed with open cage (placed in the feeding room with air cleanliness level 7), which was referred to as barrier environment feeding group, which was raised to 16 weeks of age. During the period, the growth index growth data of SPF ducks under the two method were measured and compared every 4 weeks.Results　During the brooding period (0-4 weeks), the growth of body weight and chest depth in the isolated environment feeding group was significantly higher than that in the open cage group (P< 0.01). The growth of body oblique length and chest width was significantly higher than that in the open cage group (P<0.05), while the growth of body weight, chest depth and chest width in the 4-8 weeks was significantly lower than that in the barrier environment feeding group (P<0.01). The growth of chest depth in the 8-12 weeks was significantly lower than that in the barrier environment feeding group (P< 0.01). The growth of body weight and body oblique length in the 12-16 weeks was significantly lower than that in the barrier environment feeding group (P<0.01). And the growth of chest depth and chest width was significantly lower than that in the barrier environment feeding group (P<0.05).Conclusion The growth performance of the isolated environment feeding group is better than that of the barrier environment feeding group in the brood period (0-4 weeks). And the growth performance of the barrier environment feeding group is better than that of the isolated environment feeding group in the adult period (4-16 weeks). 

Key words: SPF duck, feeding mode, growth properties