Predictive Models for Chicken Effective Energy Using an in Vitro Simulated Digestion Method Applied to Corn and Sorghum from Different Sources
The objective of this experiment was to evaluate the enzymatic hydrolysate gross energy(EHGE)of corn and sorghum from different sources using a simulated digestion system(SDS)designed for monogastric animals.This study aimed to develop predictive models for apparent metabolizable energy(AME)and true metabolizable energy(TME)utilizing EHGE values,in conjunction with the AME and TME data obtained from chickens in prior research.The investigation employed a completely randomized design to examine five different sources of corn and sorghum.The in vitro dry matter digestibility(IVDMD),in vitro gross energy di-gestibility(IVGED),and EHGE for each sample were determined using the SDS.The AME and TME values from a previous study,which used the same batches of raw materials to conduct tests on healthy and mature Hy-Line brown roosters,served as reference points.The results showed as follows:1)there were significant differences in IVDMD,IVGED,and EHGE among different sources of corn(P＜0.05).Corn No.2 exhibited significantly higher IVDMD,IVGED,and EHGE than corn No.1 at 75.12％,80.89％,and 15.19 MJ/kg DM,respectively.2)Similarly,significant differences were observed in IVDMD,IVGED,and EHGE among different sources of sorghum(P＜0.05).Sorghum No.5 demonstrated the highest values for IVDMD,IVGED,and EHGE at 79.28％,85.15％,and 15.37 MJ/kg DM,respectively,while sorghum No.2 exhibi-ted the lowest values at 55.93％,58.28％,and 10.72 MJ/kg DM,respectively.3)A significant positive cor-relation was observed between EHGE and AME(P＜0.05),as well as between EHGE and TME for sorghum.The correlation coefficients between EHGE and AME,or between EHGE and TME,for corn were both 0.80.4)The prediction models for corn and sorghum AME based on EHGE were as follows:AME=7.62+0.57× EHGE[R2=0.64,residual standard deviation(RSD)=0.11,P=0.11]for corn,and AME=10.03+0.31 × EHGE(R2=0.80,RSD=0.38,P=0.04)for sorghum.The prediction models for corn and sorghum TME based on EHGE were as follows:TME=7.58+0.58×EHGE(R2=0.64,RSD=0.11,P=0.10)for corn,and TME=9.98+0.33×EHGE(R2=0.89,RSD=0.28,P=0.02)for sorghum.In conclusion,the evaluated val-ues of EHGE for corn and sorghum from different sources show significant variance.There is a notable correla-tion between AME and EHGE,as well as between TME and EHGE for sorghum feedstocks when tested under the specific conditions of this study.Moreover,the application of the simulated digestion method in this re-search appears to enhance the predictability of both AME and TME for sorghum feedstocks.[Chinese Journal of Animal Nutrition,2024,36(5):3296-3305]
万方数据
维普
