Efect Of Fermented Soybean Meal On Growth Performance,Intestinal Microorganism And Nutrient Utilization Rate Of Weaned Piglets

To determine the efficacy of peptide sources in replacing plasma protein powder,intestinal membrane protein or fishmeal on growth performance and intestinal health of weaned piglets.Three hundred twenty 28-day-old ternary hybrid(Duroc × Landrace × Large Yorkshire)weaned piglets were randomly allocated to 4 treatments with 4 replicates per treatment.The dietary treatments were corn-soybean meal based diets: 1)3% plasma protein + 3% intestinal membrane protein + 3% fish meal diet;2)9% peptide source + 3% intestinal membrane protein + 3% fish meal diet(no plasma protein);3)4% peptide source + 3% plasma protein+ 3% fish meal diet(no intestinal membrane protein);4)3.5% peptide source + 3% plasma protein + 3% intestinal membrane protein diet(no fish meal).The experiment lasted for 28 days.The feces were taken from the rectum to determine the microba quantities on 14 d of the experiment.Blood was taken to measure immune and biochemical indicators at the last day of the experiment.Two piglets per replicate were selectet to determine nutrient use efficiency(the apparent digestibility of composition?amino acid and energy)by AIA on 42-49 day of the experiment.The results of the study showed that: 1)Compared with the conventional plasma-gutfish meal diet,9% peptide source + 3% intestinal membrane + 3% fish meal without plasma protein powder diet had the same weight gain and the diarrhea rate(P > 0.05),however,the feed intake and feed/gain significantly decreased(P < 0.05);4% peptide source +3% plasma +3% fish meal without intestinal membrane protein diet improved the daily gain but reduced feed/gain and diarrhea rate(P < 0.05);the highest final weight,daily gain,and feed intake,also lowest feed/gain and diarrhea rate of piglets were observed(P < 0.05)in 3.5% peptide source + 3% plasma + 3% intestinal membrane group with the same survival rate..2)The 4% peptide source +3% plasma +3% fish meal group showed the lowest total quantity of E.coli(P < 0.10)compared with other groups;the 9% peptide source + 3% intestinal membrane + 3% fish meal group showed the highest total quantity of lactobacillus(P < 0.10)and highest antibody levels of IgA and IgM(P < 0.05).There were the lowest E.coli and highest lactobacillus quantities(P < 0.10)in non-peptide source group.3)Compared with the conventional plasma-gut-fish meal diet,9% peptide source + 3% intestinal membrane + 3% fish meal diet?4% peptide source + 3% plasma protein+ 3% fish meal diet and 3.5% peptide source + 3% plasma protein + 3% intestinal membrane protein diet improved the apparent utilization of EE?CP?OM?CHO and GE,and the apparent digestibility could be increased by2.2%,0.5% and 1.6%,respectively(P < 0.05).4)Compared with the conventional plasma-gut-fish meal diet,9% peptide source + 3% intestinal membrane + 3% fish meal diet?4% peptide source + 3% plasma protein+ 3% fish meal diet and 3.5% peptide source + 3% plasma protein + 3% intestinal membrane protein diet showed higher apparent utilization of essential amino acids(Lys,Met,Trp,Arg,His,Leu,Ile,Phe,Thr and Val)and non-essential amino acids(Asp,Ser,Glu,Gly,Ala,Cys,Tyr).The apparent digestibility of total essential amino acids increased by 0.96%,0.84% and 2.74%,respectively.The apparent utilization ratio of total non-essential amino acids increased by 0.46%,0.75% and 3.02%,respectively(P < 0.05).It is proved that 3% of the plasma protein powder in weaned piglets could be replaced by 9% of peptide source,4% of peptide source could replace 3% of intestinal membrane protein,and3.5% of that could use as functional as 3% of fish meal..The peptide source used in weaned piglets for replacing plasma protein in improving growth performance,intestinal flora,immunity and utilization of dietary nutrient and energy is practicable.