Effects Of Different Feeding Methods On Meat Performance And Plasma Biochemical Parameters Of Eliminated Laying Hens

In order to study the effects of different breeding methods on the meat performance and plasma biochemical indexes of Laying hens.This experiment was carried out with Laying hens as a sample,using a completely randomized experimental design method.90 eliminated chickens were randomly divided into three experimental groups,namely the group in the cage,the group in the floors and the group in forest culture.The experiment lasts for 50 days and after the experiment,the slaughter performance,flavor content and plasma biochemical indicators and other data were collected for statistical analysis.Then the orthogonal experimental design scheme was used to study the effects of different feeding methods on slaughter performance,flavor content and plasma biochemical indexes of laying hens were studied.The main research result are as follows:1.Different feeding methods had a significant impact on the performance of meat production(P<0.05).The performance of meat production was the best in the collagen floor group,followed by the forest culture group,and the lowest in the cage group.2.Different feeding methods had no significant influence on the slaughter rate and the total clean chamber rate of Laying hens in the slaughter performance at the elimination stage(P>0.05),and the semi-clean chamber rate in the cage group was significantly higher than that in the forest culture group group(P<0.05).3.Different feeding methods had significant effect on muscle quality of Laying hens.The flesh color and shear force of the chest muscle in the forest culture group were significantly lower than those in the other two groups(P<0.05).The crude fat cage group was significantly higher than the other two groups(P<0.01).Collagen floor group was significantly lower than the other two groups(P<0.05).The lower succinous forest culture group was significantly lower than the other two groups(P<0.05).The shear force cage group was significantly larger than the other two groups(P<0.05).It was significantly larger than the other two groups(P<0.05).The crude protein cage group was significantly higher than the other two groups(P<0.05).The crude fat cage group was significantly higher than the other two groups(P<0.01).The subcollagen forest culture group was significantly higher than the other two groups(P<0.05).4.Different feeding methods had significant influence on the umami content of Laying hens.There was no significant difference in glutamate content among the three groups(P>0.05),but glutamate and total amino acid content were the highest in the forest culture group,followed by the cage group,and the lowest in the floor group.The content of creatinine in the forest culture group was significantly higher than that in the other two groups(P<0.05).5.Different feeding methods had significant influence on the plasma biochemical indexes of laying hens in the elimination stage.The plasma protein content in the forest culture group was significantly higher than that in the cage group(P<0.05).The content of ALT and AST in the forest culture group was significantly higher than that in the cage group and the collagen floor group(P<0.01).The activity of AKP and LDH in the cage group and the collagen floor group was significantly higher than that in the forest culture group(P<0.01).The blood fat content in the cage group was significantly lower than that in the other two groups(P<0.05).