Study On The Biologic Function Of Soybean Peptides

A serial of experiments in this article were conducted to investigate for the modulation functions of soybean peptides on intestinal flora, promoting effect of on growth of cell-mediated immunity animal cells performance and soybean peptides' antioxidative mechanism.1.Soybean peptides was used to test its effects of improvement on intestinal microbiota (Lactobacillus Streptococcus faecium cernelle Bacillus Candida utilis xE.coli. and S.pullorum) in vitro, the growth rates of fourteen strains were significantly higher than the control groups(p<0.01) with soybean peptides. Soybean peptides was used to test its effects of balances on intestinal microbiota in vitro, The results showed that soybean peptides can promote the growth of probiotics and control pathogenetic microorganism(p<0.01). soybean peptides has strong anti-oxidation effects in vitro and the antioxidative mechanism expressed in three ways:scavenging free radicals,chelating metal iron, inhibit production of MDA in tissue and swelling of mitochondria. Soybean peptides was used to test its effects of improvement on T-lymphocyte B-lymphocyte liver cells and kidney cells in vitro. The results showed that T-lymphocyte proliferation were significantly higher than the control groups with soybean peptides of 0. 4mg/ml and liver cells proliferation 52. 23%with soybean peptides of 24mg/ml and kidney cells promote 59.49% with 9. 6mg/ml (p<0. 01).2. five hundred broilers of 1 day were randomly divided into 5 groups. Contral group A was fed basal diet, group B was fed antibiotic diet, groupC D E were fed basal diet fortified with 0.1% 0. 3% 0.5% soybean peptides respectively. At the termination of feeding trial, chickens were slaughtered to evaluate Performance carcass quality the change of immune function and intestinal microbiota. The results showed that during day 1 to 49, soybean peptides produced better result, its average weight gain and feed conversion rate showed no significant difference from that of group A and B; breast meat rate and leg meat rate added with soybean peptides was higher than that of group A and B, abdominal fat rate added with soybean peptides was lower than that of group A and B;It can improve the weight of thymusx spleenand bursa cloacalis, improve T-lymphocyte proliferation and bovine serum albumin(BSA) antibody value; It can promote the growth of probiotics (such as Lactobacillus) 20 times than group A and reduce pathogenetic microorganism(as E.coli.) over 10 times. The addtion of 0. 3% soybean peptides was better for improvement of immune function and performance.