饲粮蛋白质水平和氨基酸补充模式对1～28日龄仔鹅生长性能和氨基酸含量的影响OA北大核心CSTPCD

The experiment was to study the effects of different protein levels and amino acid supplementation patterns based on corn-soybean meal diet on the growth performance,shin length,shin circumference,leg muscle,and liver amino acid content of 1～28-day-old goslings.A total of 364 one-day-old male Jiangnan White goslings were randomly divided into four groups,with seven replicates in each group and 13 goslings in each replicate.A two-by-two factorial completely randomized experimental design was used,with two protein levels(18.55％and 15.55％)and two amino acid supplementation patterns(supplementing essential amino acids only and supplementing all amino acids).The four groups were designated as PM(CP 18.55％+essential amino acids,11.20 MJ/kg),PA(CP 18.55％+all amino acids,11.20 MJ/kg),LPM(CP 15.55％+essential amino acids,11.20 MJ/kg),and LPA(CP 15.55％+all amino acids,11.20 MJ/kg).There were six main amino acids and 12 total amino acids.The experiment lasted for 28 days.The results showed that compared with CP 18.55％,CP 15.55％significantly reduced the average body weight of the goslings on the 7th,14th and 21st day(P＜0.05).Compared with the all amino acid supplementation mode,the essential amino acids supplementation mode of the 14-day goslings and the contents of alanine(Ala),methionine(Met),tyrosine(Tyr),histidine(His)and proline(Pro)in the liver of the goose on the 28th day significantly increased(P＜0.05).Compared with CP 18.55％,CP 15.55％significantly reduced the Met content in goslings liver on the 28th day and the threonine(Thr)content in goslings feces on the 27th day to 29th day(P＜0.05).The results showed that different protein levels and amino acid supplementation patterns had no adverse effect on the growth performance of goslings on the 28th day,and the adaptability of goslings to low-protein diet was high in the early stage,and reducing the protein level would not have a negative impact on the performance of goslings.