Study on Effects of Chemical Composition on Metabolizable Energy and Its Prediction Model in Dried Liquor Distiller's Grains for Broilers
This study was conducted to investigate metabolizable energy and its prediction models of dried liq-uor distiller's grains from different sources for white feathered broilers.Broilers during 11 to 14 days of age and 25 to 28 days of age and 11 experimental diets consisted of a basal diet and 10 diets of dried liquor distill-er's grains were used in a 2×11 factorial arrangement in a randomized complete design.Each experimental diet was allocated to 6 replicates of 8 chickens per replicate or 6 replicates of 8 chickens per replicate when broilers aged from 11 to 14 days or 25 to 28 days.The total collection method was used to collect all excreta of each repetition as the experimental unit to determine the metabolizable energy of the experimental diet,and then cal-culate the metabolizable energy of dried liquor distiller's grains.The correlation between chemical composition and metabolizable energy of dried liquor distiller's grains was analyzed,and the prediction models of apparent metabolizable energy(AME)and nitrogen corrected apparent metabolizable energy(AMEn)were established by stepwise regression method.The results showed as follows:1)the high crude fiber(CF)content(≥20.10％)and low metabolizable energy(AME was 2.96 to 6.70 MJ/kg DM)were observed in dried liquor distiller's grains.No significantly difference was observed in the metabolizable energy of the same dried liquor distiller's grains for broilers during 11 to 14 days of age and 25 to 28 days of age.2)The AME(r=-0.689,P＜0.05)and AMEn(r=-0.688,P＜0.05)of dried liquor distiller's grains were negatively correlated with CF content in broilers during 11 to 14 days of age.The negative correlation between AME and CF(r=-0.726,P＜0.05),positive correlation between AMEn and crude protein(CP)(r=0.640,P＜0.05),negative corre-lation between AMEn and CF(r=-0.776,P＜0.05)and acid detergent fiber(ADF)(r=-0.655m P＜0.05)of dried liquor distiller's grains were observed in broilers during 25 to 28 days of age.3)The prediction mod-els of metabolizable energy in dried liquor distiller's grains for broilers during 11 to 14 days of age were as fol-lows:AME=9.52-0.158×CF(R2=0.474,RSD=0.84 MJ/kg DM,P=0.028);AMEn=9.12-0.155×CF(R2=0.474,RSD=0.82 MJ/kg DM,P=0.028);the prediction models of metabolized energy in dried liquor distiller's grains for broilers during 25 to 28 days of age were as follows:AME=-4.43+0.758×gross energy(GE)-0.179×CF(R2=0.773,RSD=0.62 MJ/kg DM,P=0.006);AMEn=-2.81+0.652×GE-0.176×CF(R2=0.819,RSD=0.51 MJ/kg DM,P=0.008).In conclusion,the content of CF in dried liquor distiller's grains is the most important predictor of metabolizable energy in broilers during 11 to 14 days of age,and the CF content and GE were the main predictors of metabolizable energy in broilers during 25 to 28 days of age.[Chinese Journal of Animal Nutrition,2024,36(9):5682-5692]
dried liquor distiller's grainmetabolizable energybroilersprediction model
万方数据
维普
