外源5′-尿苷酸对断奶仔猪生长性能及抗氧化能力的影响

Effects of urine 5'-monophosphate on the Growth Performance and Antioxidant Capability in Weaned Piglets

【目的】研究外源5′-尿苷酸对断奶仔猪生长性能和抗氧化能力的影响。【方法】将90头28日龄断奶的"杜×长×大"三元杂交断奶仔猪,随机分成3组,每组3个重复,对照组饲喂基础日粮,试验Ⅰ和Ⅱ组在基础日粮中分别添加质量分数0.15%,0.25%5′-尿苷酸日粮,试验期为28d。测定断奶仔猪生长性能、腹泻频率,以及试验开始后第7,14和28天断奶仔猪血清中超氧化物歧化酶(SOD)活性、总抗氧化能力(T-AOC)、过氧化氢酶(CAT)活性和MDA含量。【结果】与对照组相比,Ⅱ组断奶仔猪平均日增质量、日采食量均呈上升趋势,料重比、腹泻频率均呈下降趋势,但差异不显著(P>0.05),第7和14天,Ⅱ组断奶仔猪血清SOD活性分别较对照组提高20.89%和25.35%(P<0.05);第14天T-AOC和第28天CAT活性均显著高于对照组(P<0.05),第14天MDA含量显著低于对照组(P<0.05)。【结论】日粮中添加质量分数0.25%5′-尿苷酸,可以提高断奶仔猪的生长性能和抗氧化能力。

[Objective] The study investigated the effects of urine 5′-monophosphate on growth performance and antioxidant capability in weaned piglets. [Method] 90 piglets （Duroc × Landrace × Large white） weaned at 28^th day were randomly divided into 3 groups of 3 replicates. The control group was fed basal diet,test group Ⅰ and Ⅱ were supplemented with 0.15% and 0.25% urine 5′-monophosphate respectively. The experiment lasted for 28 days. Growth performance, diarrhea frequency and activity of SOD, CAT,T-AOC and content of MDA at 7th,14th and 28th day were determined. [Result] Compared to the control group, there was a tendency to increase average daily gain, daily feed intake and decrease feed/gain, diarrhea frequency for weaned piglets in group Ⅱ （P〉0. 05）. The SOD activity increased by 20.89% and 25.35% on 7^th and 14^th day（P〈0.05） ,T-AOC on 14^th day and activity of CAT on 28^th day increased （P〈 0.05） ,content of MDA on 14^th day decreased in group Ⅱ （P〈0.05）. [Conclusion] 0.25% urine 5′-mono- phosphate addition in basal diet could increase performance and antioxidant capability in weaned piglets.