植物蛋白小肽对哺乳仔猪血液生化指标和肠道微生物区系影响的研究

本文旨在研究植物蛋白小肽对哺乳仔猪血液生化指标和肠道微生物区系的影响。试验选用(7±2)日龄的PIC五元杂交系哺乳仔猪400头,随机分为Ⅰ、Ⅱ、Ⅲ、Ⅳ4个组,每组10个重复,每个重复10头猪。各组日粮为在玉米-豆粕型基础日粮的基础上分别添加2%鱼粉、2%血浆蛋白粉、2%植物蛋白小肽和4%植物蛋白小肽。试验自7日龄补饲开始至21日龄断奶结束。试验结束时,每组选取体格中等的3头仔猪,进行前腔静脉采血和屠宰试验。研究结果表明:(1)日粮中添加4%的植物蛋白小肽可以显著提高哺乳仔猪血糖浓度、血清总蛋白浓度(P<0.05),降低血清尿素氮的含量(P<0.05);(2)日粮中添加4%的植物蛋白小肽或2%的血浆蛋白粉可以显著提高血清中IgG的水平;(3)哺乳仔猪日粮中添加4%的植物蛋白小肽可以显著降低大肠杆菌和沙门氏菌的数量,同时显著提高盲肠中乳酸杆菌的数量(P<0.05)。

Effect of Plant Small Peptides on Blood Biochemical Indexes and Gut Flora of Suckling Piglets

To study the effect of plant small peptides on blood biochemical indexes and gut flora of suckling piglets,four hundred PIC suckling piglets initially (7±2) days of age] were randomly allotted into 4 treatments, with ten pigs per pen and ten replicate pens per treatment. From 7 to 21 days of age, each treatment was randomly fed with one of four diets that were formulated to contain 2% fish meal, 2% spray-dried porcine plasma (SDPP), 2% plant small peptides and 4% plant small peptides, respectively. At the end of the trial, three piglets with moderate body weight in each treatment were killed after being bled from the anterior vena cava. The result indicated that 1) diets supplemented with 4% plant small peptides could significantly improve the concentration of blood sugar and serum total protein and decrease the concentration of serum urea nitrogen (P＜0.05);2) the level of IgG of pigs fed 4% plant small peptides or 2% SDPP was higher than that of the control group (P＜0.05) ;3) Diets supplemented with 4% plant small peptides Could significantly decrease the amount of Escherichia coli (E. coli) and Salmonella (P＜0.05) while remarkably increase the amount of Lactobacillus in cecum.