低蛋白质日粮型预混料对猪血清生化与氨基酸的影响研究

为了对低蛋白质日粮型预混料影响生长猪血清生化和氨基酸指标进行研究。将64头生长猪随机分为A、B、C、D组，A、B组应用4%低蛋白质日粮型预混料，C、D组应用4%普通预混料。42天试验末，前腔静脉采血测定血清生化指标及氨基酸。结果表明：与对照组C（正常蛋白质水平）相比，A组（正常蛋白质水平补充必需氨基酸）、D组（日粮蛋白质水平降低1.9个百分点而未补充氨基酸）葡萄糖含量分别升高23.06%、16.33%，B组葡萄糖下降25.42%，差异均显著(P<0.05)。A组血清尿素氮含量显著高于B、D组(P<0.05)。与A组相比，B、C、D组血清赖氨酸分别下降33.4%、28.7%、23.5%，苏氨酸分别下降31.6%、36.5%、27.2%，差异均显著(P<0.05)。说明低蛋白质日粮补充4种必需氨基酸，机体对葡萄糖吸收利用显著增强，对赖氨酸、苏氨酸利用率也明显提高，氮沉积能力有增强趋势。

Effects of Low-protein Premix on Serum Biochemistry Parameter and Amino Acid of Grower Pigs

In this part, the effects of low-protein premix on serum biochemistry parameter and amino acid of grower pigs were conducted. 64 grower pigs were randomly allocated to group A, B, C and D. Group A and B diet were added with 4% low-protein diet premix, and group C and D diet were added with 4% common premix. Biochemistry parameter and amino acid of serum from precava were determined. Compared with control group C （normal CP level）, serum glucose was increased by 23.06% and 16.33% respectively in group A （normal CP level with addition of EAA） and D （decline of 1.9 percent of CP level, with no addition of essential amino acid （EAA）, but decreased by 25.42% in group B （decline of 1.6 percent of CP level, with addition of EAA）. All the differences were significant （P〈0.05）. Serum blood urea nitrogen of group A was higher than in group B and D （P〈0.05）. Compared with group A, serum lysine and threonine were significantly decreased by 33.4% and 31.6%, 28.7% and 36.5%, 23.5% and 27.2% respectively in group B, C and D （P〈 0.05）. It indicated that when adding EAA to a low-protein diet, the utilization of glucose, lysine and threonine was enhanced, and the trend of improved nitrogen deposition was observed.