蒙脱石对断奶仔猪生长性能、血清生化和骨矿物质水平的影响

Effects of montmorillonite addition on growth performance,blood traits and bone mineralization in weaned piglets

文章旨在探讨日粮添加不同水平的蒙脱石对断奶仔猪生长性能、血清生化、抗氧化指标及骨矿物质水平的影响。试验选择240头32 d断奶、平均体重为(10.46±0.87)kg的仔猪,随机分为4组,每组6个重复,每个重复10头。各组仔猪日粮中分别添加0、16和32 g/kg的蒙脱石,添加量用等量的麸皮扣除,试验为期28 d。结果:日粮添加16和32 g/kg蒙脱石组仔猪在15~28 d的日增重较对照组显著提高了4.93%和4.48%(P<0.05),同时1~14 d时8 g/kg蒙脱石组仔猪料重比表现最低(P<0.05),而15~28 d时32 g/kg蒙脱石组仔猪料重比最低(P<0.05),在1~28 d时,32 g/kg蒙脱石组仔猪料重比较对照组显著降低了2.60%。16和32 g/kg蒙脱石组仔猪血清超氧化物歧化酶活性较对照组显著提高了30.04%和34.27%(P<0.05),而丙二醛含量显著降低了37.37%和38.81%(P<0.05)。但16和32 g/kg蒙脱石组骨骼强度较对照组显著提高了13.21%和15.02%(P<0.05)。蒙脱石组骨中钠含量显著高于对照组(P<0.05),但锰、锌、铁和铜含量均显著低于对照组(P<0.05)。结论:日粮添加32 g/kg蒙脱石可以改善饲料效率、骨骼强度、血清抗氧化,但降低了骨中部分矿物含量。

The aim of this study was to investigate the effects of different levels of montmorillonite supplementation on growth performance,serum biochemistry,antioxidant index and bone mineral level of weaned piglets.240 piglets weaned on 32 days with an average weight of(10.46±0.87)kg were randomly divided into 4 groups with 6 replicates in each group and 10 piglets in each replicate.The diets of piglets in each group were supplemented with 0,16 and 32 g/kg montmorillonite respectively.The amount of montmorillonite was deducted by equivalent bran for 28 days.Results:diet added 16 and 32 g/kg montmorillonite group of piglets in the daily gain of 15 to 28 d was significantly increased by 4.93%and 4.48%(P<0.05),and 1-14 d 8 g/kg montmorillonite groups piglets material performance than the lowest(P<0.05),while 15 to 28 d 32 g/kg montmorillonite groups piglets material performance than the lowest(P<0.05),in 1-28 d,32 g/kg montmorillonite group piglet material are compared the control group significantly reduced by 2.60%.The activity of superoxide dismutase in serum of piglets in the 16 and 32 g/kg montmorillonite group was significantly increased by 30.04%and 34.27%compared with the control group(P<0.05),while the content of malondialdehyde was significantly decreased by 37.37%and 38.81%(P<0.05).However,the bone strength of the 16 and 32 g/kg montmorillonite group was significantly increased by 13.21%and 15.02%compared with the control group(P<0.05).The content of sodium in the bone of the montmorillonite group was significantly higher than that of the control group(P<0.05),but the content of manganese,zinc,iron and copper was significantly lower than that of the control group(P<0.05).Conclusion:Adding 32 g/kg of montmorillonite to the diet can improve feed efficiency,bone strength and serum antioxidant,but reduce some mineral content in bone.