日粮赖氨酸水平对12～18周龄雌性临武鸭血液生化指标的影响

Influence of Lysine Level in Basal Diet on Serum Biochemical Indexes of 12-18 w Male Linwu Duck

为研究日粮不同赖氨酸（Lys）水平对12～18w雌性临武鸭血液生化指标的影响，试验选取健康、体重接近的84d雌性临武鸭210羽，随机分为5个处理（赖氨酸水平分别为0．55％、0．65％、0．75％、0．85％、0．95％），每处理设6个重复，每重复7只鸭，试验全期为42d。结果表明：日粮赖氨酸水平显著或极显著影响试鸭血清甘油三酯、碱性磷酸酶和谷草转氨酶／谷丙转氨酶水平（P＜0．05或P＜0．01），但对血糖、总胆固醇、尿酸、尿素氮、肌酐和谷丙转氨酶无明显影响（P＞0．05）；日粮赖氨酸水平对血清生长激素、胰岛素、胰高血糖素、皮质醇、T3、T4和T3／T4影响均不显著（P＞0．05）。试验结果表明，以血液生化和激素作为评价指标，日粮0．55％赖氨酸水平即可满足12～18w雌性临武鸭机体生长发育需要。

In order to research the effects of Lys level of 84 to 126‐day‐old Linw u duck on serum bio‐chemical and hormonal indices ,210 healthy 84‐day‐old Linwu ducks with nearly the same weight were ran‐domly selected and allocated to 5 groups （the level of Lys were 0 .55% ,0 .65% ,0 .75% ,0 .85% and 0 .95% ） ,6 replicates in each group and 7 Linwu ducks in each replicate .The experiment lasted for 47 days .The results showed：① there were no significant difference on GLU ,CHO ,UA ,BUN ,Cr and ALT （P〉0 .05） ,but diets of different Lys levels significantly affected the content of TG ,ALP and AST/ALT （P〈0 .05 or P〈0 .01）;②there were no significant difference on GH ,Ins ,GIU ,Cor ,T3 ,T4 and T3/T4 （P〉0 .05） .In conclusion ,with the serum biochemical indices and serum hormonal indices as evalu‐ation indexes ,the 0 .55% Lys level of diets can fulfill the requirement of duck＇s grow th and development , and the most appropriate diet＇s Lys level of 12 to 18 week‐old Linwu ducks was 0 .75% ~0 .85% .