Verification Test of《Nutritional Requirements of Laying Ducks》

ZHANG Yuhong; ZHANG Shuyue; CHEN Wei; WANG Shuang; XIA Weiguang; JIN Chenglong; WANG Shenglin; ZHENG Chuntian; ZHANG Yanan

doi:10.19978/j.cnki.xmsy.2025.04.04

Abstract：In response to the urgent need for refined management and scientific feeding strategies in the current laying duck industry,a validation study was conducted on the recently published"Nutrient Requirements of Laying Ducks"(GB/T 41189-2021).Diets were formulated at 95%,100%,and 105%of the standard recommended nutrient levels to investigate the applicability of current standards through comprehensive evaluation of production performance and egg quality.A total of 216 healthy 29-week-old Longyan Shanma ducks with similar production performance were randomly allocated into three groups,with six replicates per group and twelve ducks per replicate.Three experimental diets were administered for an 18-week trial period.The results revealed that:(1)Regarding laying performance,no significant differences were observed in laying rate and feed-to-egg ratio among groups(P>0.05).However,significant effects were detected on feed intake,average egg weight,and egg breakage rate.The lowest feed intake was recorded in the 100%group,while the highest average egg weight and lowest egg breakage rate were observed in the 105%group(P<0.05).(2)In egg composition analysis,significant effects were found on albumen weight and eggshell weight(P<0.05),with both parameters being higher in the 105%group,though no significant differences were detected in the proportion of egg components among groups(P>0.05).(3)Regarding egg quality parameters,no significant effects were observed on albumen height,Haugh unit,eggshell strength,or eggshell thickness(P>0.05),while the egg shape index was significantly influenced,reaching its highest value in the 105%group(P<0.05).In conclusion,under the experimental conditions,when evaluated against key production indicators including laying rate,feed-to-egg ratio,and egg quality,the current standard of"Nutrient Requirements of Laying Ducks"(GB/T 41189-2021)was demonstrated to meet production requirements.However,it is recommended that the nutrient level be adjusted to 95%when the egg breakage rate is incorporated as an additional evaluation criterion.