To investigate the effects of mixed preparation of enzyme and probiotics(MPEP)on the production performance,egg quality,and economic benefits of ducks.1200 healthy ducks aged around 60 weeks were randomly divided into 4 groups,with 10 replicates in each group and 25 ducks per replicate.Add compound enzyme bacterial preparations of 0,35,70,and 140 mg/kg to ducks as feed for each experimental group for a total of 16 weeks,including 15 weeks for the main trial.(Result):MPEP had a significant effect on the egg production performance of laying ducks(P＜0.05).Compared with the control group,the addition of 70 and 140 mg/kg MPEP significantly increased daily egg weight by 6.90%and 7.13%,respectively(P＜0.05),and egg production rates by 6.07%and 6.73%(P＜0.05);Significantly reduced the feed to egg ratio by 6.73%and 6.50%(P＜0.05),and the soft break rate by 24.18%and 37.05%(P＜0.05).From 1 to 5 weeks,supplementing with MPEP had no significant effect on various indicators of duck egg quality(P＞0.05).From 6 to 10 weeks,the toughness and Ha unit of duck egg shells in the 70 mg/kg MPEP group were significantly improved(P＜0.05),while the strength,toughness,and Ha unit of duck egg shells in the 140 mg/kg MPEP group were significantly improved(P＜0.05).From 11 to 15 weeks,the toughness and Ha unit of duck egg shells in the 70 and 140 mg/kg MPEP groups were significantly improved(P＜0.05).After adding MPEP,the feed unit prices were 4.548,4.553,4.557,and 4.569 yuan/kg,respectively.The gross profit of each group was calculated to be 5.70,6.92,11.34,and 10.95 yuan,respectively.Among them,the egg and duck gross profit of the MPEP group with 70 and 140 mg/kg added was significantly higher than that of the control group(P＜0.05).
mixed preparation of enzyme and probioticslaying duckproduction performanceegg qualityeconomic performance
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