【摘要】 本试验旨在氨基酸平衡日粮的基础上,探讨不同蛋白水平日粮对藏猪生产性能和血清相关生化指标的影响。试验选择健康、体重接近的2月龄藏猪48头,随机分为4组,分别饲喂蛋白质水平为16%(对照组)、14%(试验1组)、12%(试验2组)和10%(试验3组)的氨基酸平衡日粮,每组3个重复,每个重复4头藏猪。整个试验进行6个月。结果表明:与对照组相比,试验2组显著降低了藏猪6月龄的平均体重(P<0.05),试验3组显著降低了藏猪4月龄和6月龄的平均体重(P<0.05),但最终8月龄时各处理组藏猪的平均体重无显著差异(P>0.05);此外,不同蛋白水平日粮对藏猪平均日增重、平均日采食量和料重比无显著性影响(P>0.05);藏猪血清中尿素氮含量随日粮蛋白质水平的降低而下降,且各处理组间均有显著差异(P<0.05);与对照组相比,低蛋白水平日粮(12%和10%)会显著降低藏猪血清中血糖和Ig M含量(P<0.05),但对Ig G含量无明显影响(P>0.05)。综上所述,藏猪对低蛋白日粮具有良好的适应性,12%和10%蛋白水平日粮不会影响藏猪最终的生产性能,但会降低藏猪的免疫功能,藏猪日粮中蛋白水平保持在14%是一个合适的选择。更多还原

【Abstract】 This study was conducted to evaluate the effects of diets with different protein levels on Tibetan pigs’ production performance and serum biochemical. Forty-eight Tibetan pigs with similar conditions and body weight were randomly divided into 4 groups,each group of 3 replicates with 4 pigs per replicate. These Tibetan pigs were fed 16% crude protein(control group),14%(Trial 1),12%(Trial 2),or 10%(Trial 3)diets with amino acid balance. The experiment was lasted for six months. The results showed that compared with the control group,Trial 2 significantly reduced the body weight of Tibetan pigs at four-month-old(P < 0.05),Trial 3 significantly reduced the body weight of Tibetan pigs at four-month-old and six-month-old(P < 0.05),but Tibetan pigs final weight at eight-month-old were not differed in these groups(P > 0.05). In addition,there were no significant difference in average daily gain,average daily feed intake and feed weight ratio of Tibetan pigs among these different protein levels diets(P > 0.05). Serum urea nitrogen levels in Tibetan pigs decreased significantly as dietary protein levels decreased(P < 0.05). Compared with control group,lower levels of crude protein(12% and 10%)significantly reduced serum glucose and Ig M levels of Tibetan pigs(P < 0.05),but did not have much impacts on Ig G levels of Tibetan pigs(P > 0.05). In conclusion,Tibetan pigs have good adaptability to low protein diet. Diets with 12% or 10% protein levels doesn’t affect the final production performance of Tibetan pigs,but it will reduce the immune function of Tibetan pigs. The protein level in diets at 14% is a suitable choice for Tibetan pigs.更多还原