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Accuracy of predicting metabolizable energy from in vitro digestible energy determined with a computer-controlled simulated digestion system in feed ingredients for ducks

查看全文 作　　者：Yuming [1]Wang;Liting [1,2]Yin;Hu [1]Zhang;Ke [2]Li;Dailin [2]Li;Feng [1]Zhao 高影响力作者 机构地区：[1]The State Key Laboratory of Animal Nutrition,Institute of Animal Sciences,Chinese Academy of Agricultural Sciences,Beijing 100193,China;[2]Newhope Liuhe Co.Ltd.,Beijing 100102,China高影响力机构 出　　处：《Animal Nutrition》索引2022年第1期,共9页高影响力期刊 基　　金：This work was financially supported by the Innovation Team of the Chinese Academy of Agricultural Sciences(ASTIP-IAS07)(Beijing,China)and fund of Newhope Liuhe Co.,Ltd.(2014-YF-01)(Beijing,China). 摘　　要：Two experiments were conducted to study the accuracy of predicting true metabolizable energy(TME)of ingredients for ducks from in vitro digestible energy(IVDE)determined with a computer-controlled simulated digestion system.Experiment 1 was to establish TME prediction models from the IVDE of 9 energy feed ingredients and 12 protein feed ingredients using regression analysis.Experiment 2 was to validate the accuracy of the predicted ME of 10 ingredients randomly selected from Exp.1.Ten diets were formulated with 2 to 6 of 10 ingredients.Dietary in vivo TME values were compared with calculated values based on the TME predicted in Exp.1.In Exp.1,the correlation coefficients between TME and IVDE were 0.9339(P<0.05)in 9 energy feed ingredients and 0.8332(P<0.05)in 12 protein feed ingredients.No significant difference was observed on the slope and intercept of TME regression models between 9 energy feed ingredients and 12 protein feed ingredients.Therefore,the regression model of TME on IVDE for 21 feed ingredients was TME=0.7169×IVDE+1,224(R^(2)=0.7542,P<0.01).Determined and predicted TME differed by less than 100 kcal/kg of DM in 11 ingredients,and the difference ranged from 100 to 200 kcal/kg of DM in 5 ingredients.However,the difference between determined and predicted TME varied from 410 to 625 kcal/kg of DM in rice bran,rapeseed meal,corn gluten meal,and citric acid meal.In Exp.2,the determined and calculated TME were comparable(3,631 vs.3,639 kcal/kg of DM)and highly correlated(r=0.9014;P<0.05)in 10 diets.Determined and calculated TME differed by less than 100 kcal/kg of DM in 7 diets and by 106 to 133 kcal/kg of DM in 3 diets.These results have demonstrated that TME can be accurately predicted from IVDE in most feed ingredients,but it is less accurate for rice bran,rapeseed meal,corn gluten and citric acid meal. 关 键 词：DUCK In vitro digestible energy Prediction model True metabolizable energy
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