纳米载铜蒙脱石对断奶仔猪生长、肠道菌群及其肠黏膜形态的影响  

Effects of Cu(II)-exchanged montmorillonite on growth performance,intestinal microflora and morphology of intestinal mucosa in weanling pigs

作　　者：郭彤[1] 马玉龙[2] 许梓荣[3] 

机构地区：[1]上海水产大学生命科学与技术学院,上海200090 [2]宁夏大学生命科技学院,宁夏银川750021 [3]浙江大学动物科学学院教育部动物分子营养学重点实验室,浙江杭州310029

出　　处：《畜牧与兽医》2006年第1期4-8,共5页Animal Husbandry & Veterinary Medicine

基　　金：国家自然科学基金资助项目(30471255);国家"985"重点学科资助项目;上海市重点学科建设项目(Y1101)

摘　　要：选用128头健康“杜长大”三元杂交断奶仔猪,随机分为对照组、CuSO4组、纳米蒙脱石(MMT)组和MMT-Cu组,分别饲喂基础日粮(对照组)、基础日粮+78 mg/kg Cu2+(CuSO4.5H2O,相当于MMT-Cu中Cu2+的量)、基础日粮+2.0 g/kgMMT、基础日粮+2.0 g/kgMMT-Cu。结果表明,与对照组相比,MMT-Cu组能显著提高(P<0.05)断奶仔猪的平均日增重、饲料转化效率及小肠绒毛高度、绒毛高度与隐窝深度的比值,显著降低(P<0.05)腹泻率及小肠、结肠内容物中大肠杆菌和沙门氏菌的数量;而MMT组也显著降低(P<0.05)仔猪腹泻率,提高(P<0.05)小肠绒毛高度和绒毛高度与隐窝深度的比值。与MMT组或CuSO4组相比,MMT-Cu组能显著(P<0.05)提高断奶仔猪的平均日增重和饲料转化效率(P<0.05),显著降低了(P<0.05)小肠和结肠内容物中大肠杆菌和沙门氏菌的数量。A total of 128 weanling pigs （ Duroc × Landrace × Yorkshire） were used to investigate the effects of MMT-Cu on growth performante, diarrhea incidence, intestinal microflora and morphology of intestinal mucosa in weanling pigs. The pigs were allocated to four dietary treatments in a randomized complete block design. The dietary treatments were ： （ 1 ） basal diet, （ 2 ） basal diet ＋ 78 mg/kg Cu2^＋ （ CuSO4 · 5H2O, equivalent to the copper in the MMT-Cu treatment group）, （3） basal diet ＋ 2.0 g/kg MMT, and （4） basal diet ＋ 2.0 g/kg MMT-Cu. The results showed that the addition of 2. 0 g/kg MMT-Cu to the diet significantly increased （P 〈 0. 05 ） the average daily gain and feed efficiency, decreased （P 〈0. 05） diarrhea incidence, reduced （P 〈 0. 05） the total viable counts of intestinal Salmonalla and Escherichia coli, and increased （ P 〈 0. 05） villus height and the ratio of villus height to crypt depth at the small intestinal mucosa as compared with the control. Supplementation with 2. 0 g/kg MMT also decreased significantly （P 〈 0. 05 ） diarrhea incidence and increased villus height and the ratio of villus height to crypt depth as compared with the control （ P 〈 0. 05 ）. Supplementation with 2. 0 g/kg MMT-Cu significantly increased daily gain and feed efficiency, reduced the total viable counts of intestinal SalmonaUa and Escherichia coli as compared with the group supplemented with 2. 0 g/kg MMT or CuSO4 （ P 〈 0. 05 ） .

关 键 词：纳米载铜蒙脱石 断奶仔猪 肠黏膜形态 腹泻 肠道菌群 

分 类 号：S816.7[农业科学—饲料科学] S828.5[农业科学—畜牧学]