Effects of different fermented soybean meal replacing fish meal on growth performance, nutrient retention, serum traits, and immune response of broilers

• Main Authors: Chun-Yi Li, 李軍毅
• Other Authors: Tu-Fa Lien
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/77159012299246181881

碩士 === 國立嘉義大學 === 動物科學系研究所 === 100 === This study aimed to investigate the feasibility that used probiotic fermented soybean meal and then adjusted the amino acids, minerals and bacterial protein (strengthen fermented soybean meal) to replace fish meal in the broilers’ diet. This study consisted of three trials. Trial 1 was to investigate the effects of adding levels of fermented solution and bromelain on the quality of fermented soybean meal. Trial 2 and 3 were to investigate the feasibility that used different levels of fermented soybean meal and strengthened fermented soybean meal to replace fish meal in broilers diet. Trial 2 including control 2.5% fish meal, added 2.5% of wet fermented soybean meal(WFSBM), wet strengthen fermented soybean meal(WBFM) and dry strengthen fermented soybean meal(DBFM) groups; Trial 3 including control 4% fish meal control, 5% soybean meal(SBM), 6% WFSBM, 5% WBFM and 4.5% DBFM groups. The experiment results of trial 2 and trial 3 showed that the growth performance in fish meal group had significantly better average daily gain and feed intake (P <0.05) than the SBM group, but compared with FSBM, WBFM and DBFM groups showed no significant difference (P> 0.05). Nutrient retention among groups had no significant differences (P> 0.05). As for the carcass traits, the relative spleen weight in WFSBM, WBFM and DBFM groups were significantly higher than in the SBM group (P <0.05), other paramates had no significant difference between the groups (P>0.05). Serum protein components results in trial 2 and trial 3 were inconsistent. The GRBC antibody titer (at 42 days of age) in WBFM group was higher than other groups in trial 2; however, in trial 3 there was no difference (P>0.05). Newcastle disease antibody titers (at 35 days of age) in WBFM group displayed significantly higher than FM group (P <0.05), but there was no significant difference compared with WFSM group (P> 0.05); however, the SBM group was significantly lower than the WBFM group in trial 3(P <0.05). Imunoglobulin had no significant difference among groups in both two trials (P>0.05). In conclusion, the soybean meal replacing with fish meal has an adverse effect on the growth performance, whereas fermented soybean meal can improve this adverse effect because strengthening fermented soybean meal replacing with fish meal had no adverse effect on broilers’ growth performance. Thus, strengthening fermented soybean meal used for fish meal substitution has its potential.