Effect Of Intestinal Membrane Protein And Fermented Soybean Meal Replacing Fish Meal On Weaned Piglets

Objective: This experiment is designed to study the effect of intestinal membrane protein and fermented soybean meal instead of fish meal on the production performance, nutrient digestibility, small intestine morphology and immune function of weaned piglets.Method: A total of 180 weaned piglets, half male and half female, Duroc ×Landrace × White at 28 days old with body weight 8.0 ± 0.5kg were randomly divided into 3 treatments, 6 replicates each treatment, 10 piglets each replicate. Feeding trial lasted 21 days with conmen feeding management. The diet of control group contained 17.0% soybean meal + 6.0% fish meal, the other two diets contained 16.6% soybean meal + 4.0% fermented soybean meal + 4.0% imported or domestic intestinal membrane protein.Result: Daily feed intake and body weight gain in the import intestinal membrane group was higher than the control group, and the domestic intestinal membrane group was lower than the control group, there were not significant differences among treatments(P≥0.05). The feed to gain ratio of the imported intestinal membrane group was lower than the control group, the domestic intestinal membrane group was higher than the control group. However, there were not significant differences among treatments(P≥0.05). The rate of diarrhea, diarrhea index and death rate were not significantly differences among treatments, respectively. Calcium digestibility in the imported intestinal membrane group decreased by 13.21%(P<0.05), but the digestibility of dry matter, crude protein, energy, crude fat and essential amino acids were not significantly different among treatments(P≥0.05). On the digestive organ weight to body weight ratio, on the liver and jejunum, the difference was not significant among treatments(P≥0.05). The ratio of duodenum and jejunum length to body weight in domestic intestinal membrane group were decreased by 28.57% and 19.90%(P<0.05) compared with the control, and decreased by 42.40% and 11.37%(P<0.05) in contrast to import group, and the import group were increased by 24% and 9.62%(P<0.05) compared with the control. For villus and crypt in duodenum and jejunum, there were no differences among groups(P≥ 0.05). The intestinal membrane protein and fermented soybean meal can significantly improve the spleen and lymph jaw immune organ index(P<0.05), can significantly improve the immune parameters in blood serum albumin(P<0.05) and mandibular lymph immune organ index.Conclusion: The production performance and nutrient digestibility were not affected by using imported or domestic intestinal membrane protein with fermented soybean meal instead of fish meal in the diet of weaned piglets. The import intestinal membrane protein does not affect the digestive organ weight and length and intestinal villus height, but the domestic membrane protein decreased the stomach and duodenum weight, jejunum length and ileal villus height. The intestinal membrane protein can enhance immunity function of weaning piglets.