海带酶解液对断奶仔猪生长性能、肠道形态和微生物组成的影响  

Effects of Kelp Enzymatic Hydrolysate on Growth Performance, Intestinal Morphology and Microbiota Composition of Weaned Piglets

作　　者：曲元凯 李明潭 臧建军[2] QU Yuankai;LI Mingtan;ZANG Jianjun(Shandong Shidai Marine Biological Technology Co.,Ltd.,Weihai 264319,China;College of Animal Science and Technology,China Agricultural University,Beijing 100193,China)

机构地区：[1]威海市世代海洋生物科技股份有限公司,威海264319 [2]中国农业大学动物科学技术学院,北京100193

出　　处：《动物营养学报》2024年第9期5566-5580,共15页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：泰山产业领军人才工程蓝色人才专项(2019-371082-01-03-039009)。

摘　　要：本研究旨在探究海带酶解液对断奶仔猪生长性能、肠道形态和微生物组成的影响。选取230头28日龄、体重为(8.44±1.50)kg的杜×长×大三元杂交断奶仔猪,随机分为5个组:无抗对照组(基础饲粮)、抗生素组(基础饲粮+50 mg/kg金霉素)、低剂量海带酶解液组[基础饲粮+25 g/(头·d)海带酶解液]、中剂量海带酶解液组[基础饲粮+50 g/(头·d)海带酶解液]和高剂量海带酶解液组[基础饲粮+75 g/(头·d)海带酶解液],每组6个重复(5个重复每栏8头猪,1个重复6头猪)。试验期28 d。结果表明:1)不同组间断奶仔猪的料重比(F/G)有差异显著的趋势(P=0.09),其中高剂量海带酶解液组的F/G最低。2)与无抗对照组相比,高剂量海带酶解液组断奶仔猪空肠隐窝深度极显著降低(P<0.01),但抗生素组差异不显著(P>0.05)。高剂量海带酶解液组断奶仔猪回肠绒毛高度极显著高于抗生素组(P<0.01);与无抗对照组及抗生素组相比,高剂量海带酶解液组断奶仔猪空肠的绒毛高度/隐窝深度极显著提高(P<0.01)。3)不同组断奶仔猪盲肠和结肠中挥发性脂肪酸(VFA)含量无显著差异(P>0.05)。4)高剂量海带酶解液组断奶仔猪回肠微生物组成及丰度与抗生素组接近,2组的优势微生物都是链球菌属,这说明海带酶解液对回肠微生物存在与抗生素具有相似的调节作用。由此可见,在饲粮中添加海带酶解液[75 g/(头·d)]可改善肠道形态和调节肠道微生物组成。This study was conducted to investigate the effects of kelp hydrolysate on growth performance,intestinal morphology and microbiota composition of weaned piglets.A total of 230 Duroc×Landrace×Yorkshire weaned piglets at 28 days of age with body weight of(8.44±1.50)kg were randomly divided into 5 groups:antibiotic free control group(basic diet),antibiotic group(basic diet+50 mg/kg kelp enzymatic hydrolysate),low level kelp enzymatic hydrolysate group[basic diet+25 g/(head·d)kelp enzymatic hydrolysate],medium level kelp enzymatic hydrolysate group[basic diet+50 g/(head·d)kelp enzymatic hydrolysate],and high level kelp enzymatic hydrolysate group[basic diet+75 g/(head·d)kelp enzymatic hydrolysate].Each group had 6 replications(5 replications with 8 pigs per pen,and 1 repetition with 6 pigs).The experimental period lasted for 28 days.The results were as follows:1)there was a significant difference in feed/gain(F/G)of weaned piglets among different groups(P=0.09),and the F/G of high level kelp enzymatic hydrolysate group was the lowest.2)Compared with the antibiotic free control group,the jejum crypt depth of weaned piglets in the high level kelp enzymatic hydrolysate group was significantly decreased(P<0.01),but there was no significantly difference compared with antibiotic group(P>0.05).The villus height in ileum of weaned piglets in the high level kelp enzymatic hydrolysate group was significantly higher than that in antibiotic free control group and antibiotic group(P<0.01);compared with the antibiotic free group and antibiotic group,the villus height and crypt depth of jejunum and ileum of weaned piglets were significantly increased in the high level kelp enzymatic hydrolysate group(P<0.01).3)There was no significant difference in volatile fatty acid(VFA)content in cecum and colon of weaned piglets under different treatments(P>0.05).4)The composition and abundance of microorganisms in the ileum of weaned piglets in the high level kelp enzymatic hydrolysate group were similar to those in the antibiotic group,

关 键 词：海带酶解液 断奶仔猪 生长性能 肠道形态 肠道微生物组成 

分 类 号：S828[农业科学—畜牧学]