Determination and Prediction Model Establishment of Amino Acid Digestibility of Wheat Bran for Growing Pigs
In this experiment,the apparent ileal digestibility(AID)and standardized ileal digestibility(SID)of amino acids of wheat bran for growing pigs were determined,and predictive models for SID of amino acids based on the contents of effective chemical components in wheat bran were established.Twenty-two"Duroc×(Landrace×Large)"growing pigs[body weight of(34.3±4.3)kg]were selected and fitted with T-shaped fistulas at the end of their ileum.According to two incomplete Latin square designs of"11×3",the pigs in each treatment were fed a nitrogen-free diet and 10 wheat bran diets,respectively,for 3 consecutive cycles,each period lasted for 7 days.It included 5 days pre-feeding period and 2 days ileal digesta collection period.The results showed that,on as-fed basis,the average contents of lysine(Lys),methionine(Met),threonine(Thr)and tryptophan(Trp)in ten wheat bran were 0.93％(0.76％to 1.19％),0.31％(0.27％to 0.40％),0.53％(0.46％to 0.62％)and 0.17％(0.13％to 0.23％),with coefficients of variation(CV)of 19.19％,14.19％,11.70％and 8.32％,respectively.The average AIDLys,AIDMet,AIDThr and AIDTrp of ten wheat bran for growing pigs were 67.03％(56.09％to 75.72％),50.96％(42.93％to 56.68％),45.91％(38.26％to 52.29％)and 76.55％(73.30％to 81.65％),and the average SIDLys,SIDMet,SIDThr and SIDTrp were 82.36％(73.21％to 90.05％),76.68％(73.39％to 81.55％),60.99％(53.14％to 65.67％)and 88.79％(86.21％to 92.03％),respectively.The optimal prediction equations of SIDLys and SIDMet were as follows:SIDLys=128.691+312.567×calcium(Ca)-14.555x crude ash(Ash)(R2=0.687);SIDMet=86.306-2.201× ether extract(EE)(R2=0.490).In summary,the amino acid composition of the 10 wheat bran in this experi-ment has visible difference,and EE,Ca and Ash contents can be used as key predictors of the SIDLys and SIDMet of wheat bran for growing pigs.[Chinese Journal of Animal Nutrition,2024,36(6):3573-3586]
wheat brangrowing pigsamino acid digestibilityprediction model
万方数据
维普
