五种发酵蛋白原料的生长猪有效能值和回肠末端氨基酸消化率测定OA

The purpose of this experiment was to evaluate the effective energy and ileal terminal amino acid digestibility of five different protein ingredients(50 fermented soybean meal,43 fermented soybean meal,fermented rice bran meal,fermented palm meal 1,and fermented palm meal 2)in growing pigs by digestive metabolism trial and ileal terminal amino acid digestibility trial.Experiment 1:Thirty-six healthy"Duroc×Landrace×Large"ternary growing pigs(35.04±1.74 kg)were randomly divided into 6 treatments(6 replicates for each treatment,1 pig for each replicate).The six treatment groups were respectively fed corn-soybean meal basal diet,50 fermented soybean meal diet,43 fermented soybean meal diet,fermented rice bran meal diet,fermented palm meal 1 diet,and fermented palm meal 2 diet.And the experimental group diets replaced corn-soybean meal with five protein ingredients at 15％content in equal proportions according to the energy-supplying components of the basal diet.The digestive and metabolic energies of the five protein ingredients were determined using the total fecal collection method.Experiment 2:In this experiment,a total of 18 Duroc× Landrace×Large hybrid healthy castrated boars with an average weight of 50.13±2.53 kg installed with a simple T-cannula were used in an incomplete Latin-square experimental design,which was divided into 6 groups.A total of 2 experimental phases were conducted(5 d pre-test period and 2 d test period for each phase,for a total experimental period of 14 d),with 6 replicates per group and 1 pig per replicate.The experimental diets used 50 fermented soybean meal,43 fermented soybean meal,fermented rice bran meal,fermented palm meal 1,and fermented palm meal 2 as the only source of protein and amino acids,and the nitrogen-free diet was used to correct for the endogenous nitrogen loss.Ileal digesta was collected during the test period for determination of apparent ileal digestibility(AID)and standardized ileal digestibility(SID)of amino acids.The results showed that:1)On a dry matter basis,the digestible and metabolizable energies of 50 fermented soybean meal,43 fermented soybean meal,fermented rice bran meal,fermented palm meal 1,and fermented palm meal 2 were 18.16 and 17.33 MJ/kg,13.51 and 12.98 MJ/kg,12.61 and 12.13 MJ·kg-1,14.15 and 13.95 MJ·kg-1,14.17 and 13.84 MJ·kg-1,respectively,on growing pigs.Overall,the digestible metabolizable energy and total energy apparent digestibility of 50 fermented soybean meal was significantly higher than the two types of fermented palm meal,43 fermented soybean meal,and fermented rice bran meal(P＜0.05),and the differences between the remaining four raw materials were not significant(P＞0.05).2)The AID and SID of crude protein and total amino acids of 50 fermented soybean meal and 43 fermented soybean meal were significantly higher than fermented rice bran meal,fermented palm meal 1 and fermented palm meal 2(P＜0.05),and the differences were not significant between two types of fermented soybean meal(P＞0.05).The differences between two types of fermented palm meal and fermented rice bran meal were not significant(P＞0.05),but two types of fermented palm meal are superior to fermented rice bran meal.