包被迷迭香精油对断奶仔猪生长性能、养分表观消化率及血清免疫、抗氧化指标的影响

Effects of Encapsulated Rosemary Essential Oil on Growth Performance,Nutrient Apparent Digestibility,Serum Immune and Antioxidant Indexes of Weaned Piglets

本研究旨在探究包被迷迭香精油对断奶仔猪生长性能、养分表观消化率及血清免疫、抗氧化指标的影响。试验选用64头、28日龄健康断奶仔猪(杜×长×大),体重为(7.80±1.57) kg,采取完全随机区组原则,分为2组,每组4个重复,每个重复8头猪(公母各占1/2)。对照组饲喂基础饲粮,迷迭香精油组在基础饲粮中添加300 mg/kg包被迷迭香精油。试验期21 d。试验开始和结束时对仔猪进行称重,每天记录投料量和剩料量,计算生长性能;试验第21天采集血液,测定血清免疫和抗氧化指标;试验第19~21天采集粪便,测定营养物质表观消化率。结果表明:2组平均日增重和平均日采食量没有显著差异(P>0.05),迷迭香精油组比对照组饲料转化效率提高了10.3%(P<0.05)。2组间血清免疫指标无显著差异(P>0.05)。与对照组相比,迷迭香精油组血清谷胱甘肽过氧化物酶活性显著提高(P<0.05),趋于提高超氧化物歧化酶活性(P=0.07)。此外,迷迭香精油组粗脂肪和中性洗涤纤维表观消化率显著高于对照组(P<0.05)。综上所述,饲粮中添加包被迷迭香精油可提高血清抗氧化能力和养分表观消化率,进而改善仔猪饲料转化效率。

This experiment was conducted to investigate the effects of encapsulated rosemary essential oil on growth performance,nutrient apparent digestibility,serum immune and antioxidant indexes of weaned piglets.A total of 64 healthy piglets[weighted(7.80±1.57)kg]weaned at 28 days of age were selected and according to the complete random block principle,allocated to 2 groups with 4 replicates per group and 8 piglets per replicate(half male and half female).The dietary treatment was as follows:1)control group,provided with a basal diet;2)rosemary essential oil group,provided with the basal diet supplementing 300 mg/kg of encapsulated rosemary essential oil.The experiment lasted for 21 days.At the beginning and end of the experiment,piglets were weighed,and the residual feed was record daily;blood was collected from piglets on d 21 to determine serum immunity and antioxidant indexes;the feces were collected on d 19 to 21 to evaluate the nutrient apparent digestibility.The results showed as follows:there was no difference in the average daily gain and average daily feed intake between the two groups(P>0.05),and those in the rosemary essential oil group increased by 10.3% in feed conversion ratio(P<0.05)compared with the control group.No significant difference in serum immune indexes between groups(P>0.05).The serum glutathione peroxidase activity in rosemary essential oil group significantly increased by 40.5%(P<0.05)and had a tendency to enhance(P = 0.07)the superoxide dismutase activity compared with the control group.Also,the apparent digestibility of ether extract and neutral detergent fiber was increased(P<0.05)in piglets fed rosemary essential oil.In summary,dietary supplemented with encapsulated rosemary essential can improve serum antioxidant capacity and nutrient apparent digestibility,which in turn improve the feed conversion ratio of weaned piglets.