试验选用相同胎次母猪的21日龄断奶杜洛克×长白×大约克健康仔猪120头,以栏为单位,依据仔猪栏平均体重(5.27 kg±0.63 kg)随机分为3组,每组5个重复,每个重复(栏)8头仔猪(公、母各半),分别饲喂对照日粮(基础日粮+2.05％丙氨酸)、精氨酸日粮(基础日粮+0.6％精氨酸)和精氨酸生素日粮(基础日粮+0.09％ AAA),试验期为7d,研究了日粮中添加精氨酸和精氨酸生素对断奶仔猪生长性能、器官相对重量和血液生化参数的影响.结果表明,日粮添加0.6％的精氨酸和0.09％的AAA,仔猪的平均日采食量、日增重有显著提高(P＜0.05)；肝脏、肾脏、脾脏和心脏的重量高于对照组,但差异均不显著(P＞0.05)；与对照组相比,精氨酸组和精氨酸生素组的血清尿素氮和碱性磷酸酶活性显著降低(P＜0.05),其它血液生化参数差异都不显著(P＞0.05).试验结果显示,日粮中添加精氨酸和精氨酸生素有利于缓解早期仔猪断奶应激,提高其生长性能,0.09％的AAA可以有效替代0.6％的精氨酸.%120 crossbred piglets were weaned at 21 d of age and then had free access to diets with 2. 05% alanine (the control group) ,the control group ,upplemented with 0. 6% L-arginine(the L-arginine group) or 0. 09% arginine activator additive (AAA) ,the experiment lasted 7 d. The goal of experiment was to determine the effects of 0. 6% L-arginine or 0. 09% AAA on growth performance, internal organs weight and serum biochemical parameters. The results showed that ADG, ADFI, feed-weight ratio increased in the L-arginine group (P<0. 05), the liver, kidney, spleen and lung weight relative to body weight were lower (P>0. 05), and the heart weight were higher (P>0. 05) in L-arginine group and AAA group than that in the control group (P<0. 05). Compared to the control group, serum SUN and ALP were lower in the L-arginine group and the AAA group (P<0. 05). These results indicated that supplementation with L-arginine or AAA could release early weaned stresses and improve growth performance of early-weaned piglets, and supplementation with 0. 09% AAA could institute 0. 6% L-arginine in piglets.
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