饲粮蛋白质及赖氨酸含量对育肥猪生产性能与血清生化指标的影响

Effects of protein and lysine concentrations in diet on productive performance and serum biochemical parameters of finishing pigs

选取90头体重约62 kg的杜×长×大三元杂交育肥猪,将其分为第1组(对照组)、第2组和第3组,每组30头猪。用猪场现行饲粮(对照饲粮)饲喂对照组猪;第2组和第3组分别饲喂不同蛋白质和赖氨酸含量的日粮。饲养试验结果表明:(1)与对照组相比,第2、3组猪平均日增重分别提高37.09%(P<0.01)、39.45%(P<0.01),饲料的转化率分别提高20.21%(P<0.01)、18.91%(P<0.01),每千克增重的饲料成本(7.51、8.01元/kg)较对照组(7.36元/kg)分别提高2.04%和8.83%。(2)第2、3组猪血清葡萄糖含量较对照组分别提高14.66%(P<0.05)、17.80%(P<0.05),血清总蛋白含量分别提高7.94%(P<0.05)、9.74%(P<0.05),血清甘油三酯含量显著提高(P<0.05),血清总胆固醇含量显著降低(P<0.05);第2组猪血清GPT活性显著地低于对照组(P<0.05),第3组猪血清GPT活性极显著地低于对照组(P<0.01);第3组猪血清GOT活性显著地低于对照组和第2组(P<0.05),血清T-SOD活性极显著地高于对照组(P<0.01),显著地高于第2组(P<0.05);第2、3组猪血清MDA含量较对照组分别减少21.27%(P<0.05)、22.17%(P<0.05)。基于试验结果可推断:育肥猪饲粮中蛋白质的适宜含量为15.25%,赖氨酸适宜含量为0.90%。

90 healthy,weighting about 62 kg, three-way crossbred（Duroc × Landrace× Yorkshire）finishing pigs were selected, then according to the similar body weight and the same gender were randomly divided into three groups：the experimental group 1 （the control group）, the experimental group 2 and 3, each group 30 pigs. The control group pigs were fed to the current diet of the pig farm;the experimental group 2 pigs were fed to the group diet 2;the experimental group 3 pigs were fed to the group diet 3. The feeding experimental results were as follows： ① ADG of the experimental group 2, 3 increased respectively by 37.09%（P〈0,01） and 39.45% （P〈0.01） compared with the control group pigs. FCR of the experimental group 2 and 3 increased respectively by 20.21%（P〈0.01） and 18.91% （P〈0.01）. The feed cost of per kilogram weight gain of the experimental group 2 and 3（7.51 yuan/kg, 8.01 yuan/kg）increased respectively by 2.04% and 8.83% compared with the control group（7.36 yuan/kg）.② Glucose in the experimental group 2 and 3 pig serum increased respectively by 14.66% （P〈 0.05） and 17.80% （P〈0.05） compared with the control group. TP in the experimental group 2 and 3 pig serum increased respectively by 7.94% （P〈0.05） and 9.74% （P〈0.05）.TG in the experimental group 2 and 3 pig serum was higher than the control group （P〈0.05）. TC in the experimental group 2 and 3 pig serum was lower than the control group（P〈0.05）,GPT activities of the experimental group 2 and 3 pig serum were lower than the control group（P〈0.05）.GOT and T-SOD activities of the experimental group 3 pig serum were lower than the control group and the experimental group 2（P〈0.05）. MDA in the experimental group 2 and 3 pig serum decreased respectively by 21.27% （P〈0.05） and 22.17% （P〈0.05） compared with the control group. Based to the results, the conclusion was made： the optimum concentration of protein and lysine in finishing pig diet was res^ctively 15.25% and 0.90%.