大豆寡糖对断奶环江香猪生长性能和营养物质代谢的影响

Effects of Soybean Oligosaccharides on Growth Performance and Nutrient Metabolism in Weanling Huanjiang Mini-pigs

为了探讨大豆寡糖(SBOS)作为抗生素替代物对断奶仔猪生长性能的影响及其作用机制,饲养试验选用21日龄断奶的环江香猪12头,随机分为2组,每组6头,分别饲喂添加0.5%SBOS日粮和抗生素对照日粮,试验期为14 d。记录每天的采食量,分别于试验开始和结束时称取空腹体重并采集血液,肝素抗凝离心分离血浆,测定生化参数和游离氨基酸水平。消化试验选用10头环江香猪,随机分为2组,处理同饲养试验。预试期4 d,正试期3 d,收集粪样,指示剂法测定干物质、粗蛋白和粗脂肪的消化率。结果表明,与抗生素对照组相比,SBOS组仔猪平均日采食量、日增重和料重比均无显著变化;血浆尿素氮和血氨含量显著下降,总蛋白含量显著升高(P<0.05);血浆甘氨酸、组氨酸、赖氨酸、精氨酸和蛋氨酸的含量均显著升高(P<0.05);粗蛋白和粗脂肪消化率有提高趋势。提示SBOS可替代抗生素用于断奶仔猪日粮。

This study was conducted to investigate the effects of soybean oligosaccharides（SBOS） as antibiotic alternatives on growth performance and its mechanism in weaned piglets.Twelve Huanjiang mini-piglets weaned at 21 d of age were randomly allocated into two groups with six replicates in the feeding trial.The piglets were fed with a antibiotic-or 0.5% SBOS-supplemented diet for 14 days.Feed intake per piglet was recorded daily,and the body weight was got at the beginning or end of this trail,as well as collecting the blood.The plasma were separated by centrifugation and used for measuring biochemical parameters and contents of free amino acids.Ten Huangjiang mini-pigs were randomly allocated into two groups as same as the feeding trial in the digestion trial.After 4 d pretrial and 3 d official test,the feces were collected to determine the digestibility of dry matter,crude protein and crude fat by indicator method.The results showed that the average daily feed intake,average daily gain and feed/gain in piglets fed SBOS-supplemented diet didn＇t compared with the control group;dietary supplementing SBOS decreased（P0.05） the plasma contents of urea nitrogen and ammonia,while increased（P0.05） the plasma content of total protein,compared with the control group;the plasma contents of glycine,histidine,lysine,arginine,and metione in piglets fed SBOS-supplemented diet increased（P0.05）,as well as the apparent digestibility of crude protein and fat（P0.05）,in comparison with the control group.These findings suggested that SBOS as an antibiotic alternative cloud be used in the diet of weaned piglets.