纳米载铜蒙脱石对断奶仔猪生长、消化性能及二糖酶活性的影响  

Effects of Cu(II)-exchanged Montmorillonite Nanoparticles on Growth Performance,Digestive Function and Mucosal Disaccharase Activities of Weaned Pigs

作　　者：郭彤[1] 马玉龙[2] 许梓荣[3] 

机构地区：[1]首都师范大学生命科学学院,北京100037 [2]宁夏大学生命科学学院,宁夏银川750021 [3]浙江大学分子营养学教育部重点实验室,浙江杭州310029

出　　处：《中国畜牧杂志》2007年第21期22-25,共4页Chinese Journal of Animal Science

基　　金：国家自然科学基金(30471255)

摘　　要：取128头健康"杜长大"三元杂交断奶仔猪,随机分为4组,每组32头。分别饲喂基础日粮(对照组)、基础日粮+3.0g/kg纳米蒙脱石(MMT)、基础日粮+3.0g/kg纳米载铜蒙脱石(MMT-Cu)及基础日粮+117mg/kgCu2+。比较研究MMT-Cu对断奶仔猪生长、消化和肠黏膜二糖酶活性的影响。结果表明:饲料中添加3.0g/kgMMT-Cu,能显著(P<0.05)提高断奶仔猪的平均日增重和饲料转化效率;显著提高饲料干物质(P<0.05)、粗蛋白(P<0.05)、粗脂肪(P<0.05)的表观消化率和十二指肠内容物中总蛋白水解酶(P<0.05)、脂肪酶(P<0.05)、淀粉酶(P<0.05)的活性。与对照组相比,添加MMT组十二指肠内容物中脂肪酶、淀粉酶活性升高显著(P<0.05)。二糖酶活性研究表明,添加3.0g/kgMMT-Cu组仔猪空肠黏膜麦芽糖酶、蔗糖酶和乳糖酶活性均显著高于(P<0.05)对照组和CuSO4组。A total of 128 weaning pigs（Duroc×Landrace×Yorkshire）were used to investigate the effects of Cu（Ⅱ）-exchanged montmorillonite nanoparticles（MMT-Cu）on growth performance,digestive function and mucosal disaccha-rase activities of weaned pigs.The weaning pigs were allocated to four dietary treatments in a randomized complete block design.The dietary treatments were basal diet,basal diet＋3.0 g/kg montmorillonite nanoparticles（MMT）,basal diet＋3.0 g/kg MMT-Cu and basal diet＋117mg/kg Cu2＋.The results showed that the addition of MMT-Cu to the diet increased significantly（P 〈 0.05）the average daily gain and feed efficiency.Supplementing the MMT-Cu in the diet of weaned pigs increased significantly（P 〈 0.05）apparent digestibilities of DM,CP and EE and improved significantly（P 〈 0.05）the activities of total protease,amylase,and lipase in the duodenum contents as compared with the control.Similarly,the activities of lipase and amylase in the duodenum content of weaned pigs fed on the diet treated with MMT were higher than those of the control.Data obtained from mucosal disaccharase activities showed that the presence of MMT-Cu in diet could increase significantly（P 〈 0.05）the activities of the sucrase,maltase and lactase in jejunal mucosa of weaned pigs as compared with those of the control and CuSO4 group.

关 键 词：纳米载铜蒙脱石 消化 二糖酶 断奶仔猪 

分 类 号：S828.5[农业科学—畜牧学]