饲粮粗蛋白水平对肥育期泰州鹅生长性能、屠宰性能、血清生化指标和肉品质的影响OA

This experiment aimed to investigate the effects of different crude protein(CP)levels in the diet on the growth performance,slaughter performance,serum biochemical indicators,and meat quality of fat-tening Taizhou geese.A total of 160 healthy Taizhou geese,aged 110 d with similar body weight(3.86±0.14)kg,were randomly divided into four groups and fed diets with CP levels of 13.5%,14.5%,15.5%,and 16.5%.Each group had 5 replicates,with 8 geese per replicate.The experiment included a 1-week pre-feeding period and a 12-week formal experimental period.Daily feed intake was recorded during the trial.At the end of the experiment,all geese were weighed and collected wing vein blood and breast muscle samples were collected.The results are as follows:① the dietary CP level had no significant effect on the growth performance of fattening Taizhou geese(P>0.05),but the gizzard index and semi-eviscerated yield in the 14.5%CP group were significantly higher than those in the 16.5%CP group(P<0.05).The total eviscerated yield in the 13.5%CP and 14.5%CP groups was significantly higher than that in the 16.5%CP group(P<0.05).② The serum glucose and low-density lipoprotein levels in the 14.5%CP group were significantly lower than those in the 16.5%CP group(P<0.05),and the superoxide dismutase activity in the 14.5%CP group was sig-nificantly higher than in the other groups(P<0.05).The malondialdehyde content in the 13.5%CP group was significantly higher than in the other groups(P<0.05).③ The L* value of the breast muscle in the 14.5%CP group was significantly lower than that in the 16.5%CP group(P<0.05).In conclusion,a dietary CP level of 14.5%can improve the slaughter performance,antioxidant capacity,breast muscle meat quality,and health status of fattening Taizhou geese.