Abstract：
The present study investigated the effects of supplementing bioactive peptides derived from rapeseed protein (rapeseed peptide, Rsp) on the growth performance, serum biochemistry and faecal micro-organism composition of weaned piglets. Sixty Duroc × Landrace × Yorkshire weaned piglets of similar weights were randomly divided into three groups. The control group (NC) was fed a basal diet, and the two treatment groups, Rsp-1 and Rsp-2, were fed a basal diet supplemented with 1% or 2% Rsp, respectively, for 28 days. Each treatment consisted of five replicates with four piglets per replicate. The results showed that Rsp treatment significantly improved the average daily gain and had a better feed-to-gain ratio (p < 0.05). The diarrhoea incidence and indices of Rsp-1 and Rsp-2 groups were significantly lower than the NC group (p < 0.05), and the effect of Rsp-2 on reducing the incidence of diarrhoea was significantly higher than that of Rsp-1 (p < 0.05). The serum albumin, serum immunoglobulin A and catalase levels of the Rsp-1 and Rsp-2 groups were significantly better than the NC group (p < 0.05). Additionally, Rsp treatment significantly gained the relative abundance of faecal Lactobacillaceae and decreased the relative abundance of faecal Eubacterium_coprostanoligenes_group, Treponema and Coprococcus (p < 0.05). In summary, Rsp supplementation improved the growth performance, ameliorated the diarrhoea, enhanced the immune and antioxidant functions and changed the composition of faecal micro-organisms in piglets. These findings indicate that Rsp positively affected the health of weaned piglets.
摘要：
本研究调查了补充来自菜籽蛋白的生物活性肽（菜籽肽，Rsp)对增长绩效的影响，断奶仔猪血清生化和粪便微生物组成。将60头体重相似的杜洛克×长白×约克郡断奶仔猪随机分为三组。对照组(NC)饲喂基础日粮,和两个治疗组，Rsp-1和Rsp-2饲喂补充有1％或2％Rsp的基础饮食，分别,28天每个处理由五个重复组成,每个重复四个小猪。结果表明，Rsp处理显著提高了平均日增重，具有较好的饲料增重比（p<0.05）。Rsp-1和Rsp-2组的腹泻发生率和指标明显低于NC组（p<0.05）。Rsp-2降低腹泻发生率的效果明显高于Rsp-1(p<0.05)。血清白蛋白，Rsp-1和Rsp-2组血清免疫球蛋白A和过氧化氢酶水平明显优于NC组(p<0.05)。此外,Rsp处理显着提高了粪便乳杆菌科的相对丰度，并降低了粪便Eubacterium_coprostanolidgenes_group的相对丰度，密螺旋体和球菌(p<0.05)。总之,补充Rsp提高了生长性能，改善了腹泻，增强了仔猪的免疫和抗氧化功能，改变了仔猪粪便微生物的组成。这些结果表明，Rsp对断奶仔猪的健康有积极影响。
