【摘要】 为了研究日粮中不同精氨酸(Arg)水平对哺乳仔猪生长性能的影响,试验选用70头7日龄健康哺乳仔猪(长×大),按照所饲日粮精氨酸添加水平的不同(分别为0、0.2%、0.4%、0.6%和0.8%),随机分为5组,每组14头,单栏饲养,试验期为14天,并分别于7、14和21日龄空腹称重,记录每周采食量;并在采食后1h颈静脉采血,检测血浆中氨基酸、血浆尿素氮、胰岛素和生长激素浓度。结果表明:7~21日龄段,试验组血浆精氨酸浓度随日粮精氨酸添加水平增大而升高,与对照组相比,0.6%和0.8%精氨酸添加组血浆尿素氮水平分别降低(P<0.05)30%~40%,生长激素和胰岛素的浓度提高(P<0.05)24%~27%,平均日增重分别提高了(P<0.05)42.2%和41.4%;各组采食量在整个试验期内无显著差异。本试验结果表明7~21日龄,仔猪日粮中精氨酸适宜添加水平为0.6%。更多还原

【Abstract】 This study was designed to determine the effect of dietary with different arginine supplementations on the growth of artificially reared piglets.The pigs (n=70;7 d old) were assigned randomly to 1 of the 5 treatments representing diets supplemented with 0,0.2%,0.4%,0.6% or 0.8% L-arginine.Body weights of piglets were measured and jugular venous blood samples were obtained for metabolite analysis at 7,14,and 21 d of age.The resultd indicate that compared with control piglets,dietary supplementation with 0.2%,0.4%,0.6%,0.8% L-arginine dose dependently increased plasma concentrations of arginine,and the supplementation of 0.6 and 0.8% L-arginine groups decreased (P<0.05) plasma concentrations of urea by 20 and 30%,respectively.Dietary supplementation with 0.6 and 0.8% L-arginine increased (P<0.05) plasma concentrations of insulin and growth hormone by 24%-27% in piglets.The supplementation of 0.6% and 0.8% L-arginine to piglets enhanced (P<0.05) average daily weight gain by 48.3% and 47.6%,respectively,compared with control piglets.During the trial,food intake did not differ between control and arginine-supplemented piglets.Our results suggested that 0.6% arginine supplementation is proper for 7-21 d old piglets.更多还原