日粮蛋白质、赖氨酸水平对生长猪生产性能及蛋白质、氨基酸消化率的影响

摘要

试验旨在研究日粮蛋白质和赖氨酸水平对生长猪生产性能及蛋白质、氨基酸消化率的影响.90头平均体重为(44.0±2.0)kg的杜长大三元阉公猪随机分为5个组,每组3个重复,每重复6头猪;1组为对照组(粗蛋白为17.47%、可消化赖氨酸为0.80%),2组～5组为试验组,试验组采用2×2因子设计,蛋白质水平为15.46%和13.49%与可消化赖氨酸水平为0.80%和0.85%.试验期30 d.试验结果表明,与对照组相比,日粮蛋白质为15.46%和13.49%、可消化赖氨酸为0.80%时,猪的生产性能和粗蛋白表观消化率差异不显著(P>0.05),赖氨酸、蛋氨酸、苏氨酸、组氨酸、胱氨酸的表观消化率差异不显著(P>0.05),而其它氨基酸表观消化率显著降低(P<0.05);日粮蛋白质为13.49%、可消化赖氨酸为0.85%时,猪的增重和粗蛋白的表观消化率显著降低(P<0.05);相同蛋白质不同赖氨酸水平对日粮氨基酸表观消化率无显著影响(P>0.05).%The experiment was conducted to investigate the effect of dietary protein and lysine level on growth production and protein and amino acid digestibility in growing pigs. A total of 90 DLY castrated boar (44.0±2.0kg) were randomly allocated into 5 groups of 3 replicates with 6 pigs in each replicate.Group 1 was control with diet of CP(crude protein) 17.47％ and DLys(digestible Lys) 0. 80％ and group 2to 5 was experiments. The experiment was designed with 2×2 factors. The diet CP were 15.46％ and 13.49％ and the diet Dly were 0.80％ and 0.85％. The experiment lasted for 30 days. The results showed the growth production and CP apparent digestibility and AA(Lys, Met, Thr, His and Cys) apparent digestibility of diet DLys 0. 80％ group(include Cp 15.46％ and CP 13.49％) had no significant difference with control group (P＞0.05) and other AA apparent digestibility had significant difference with control group (P＜0.05) . The CP 13.49％ and DLys 0.85％ decreased significantly the ADG and CP apparent digestibility (P＜0. 05). The diet with same CP level and different DLys level had no significant effect on AA apparent digestibility (P＞0. 05).