Effects of urine 5′-monophosphate on the Growth Performance and Antioxidant Capability in Weaned Piglets | 外源5′-尿苷酸对断奶仔猪生长性能及抗氧化能力的影响

chinois. 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。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28 d。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。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(P0.05)，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% (P0.05)；第14天T-AOC和第28天CAT活性均显著高于对照组(P0.05)，第14天MDA含量显著低于对照组(P0.05)。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。

anglais. The study investigated the effects of urine 5′-monophosphate on growth performance and antioxidant capability in weaned piglets. 90 piglets (Duroc×Landrace×Large white) weaned at 28th day were randomly divided into 3 groups of 3 replicates. The control group was fed basal diet, test groupⅠandⅡwere 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. 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(P0.05). The SOD activity increased by 20.89% and 25.35% on 7th and 14th day (P0.05), T-AOC on 14th day and activity of CAT on 28th day increased (P0.05), content of MDA on 14th day decreased in groupⅡ(P0.05). 0.25% urine 5′-monophosphate addition in basal diet could increase performance and antioxidant capability in weaned piglets.