Effects Of Pozzolan On Growth Performance,Antioxidant And Blood Immune Index Of Finishing Pigs

In this experiment,the effects of Pozzolan on the growth and meat quality of finishing pigs were studied by adding different levels of special volcanic powder in the diet,which provide the theoretical basis for the further development of new natural mineral feed additives.48 finishing piglets of Duroc×Landrace×Yorkshire crossed descendant with the weight of 60 kg were picked out and separated into four groups at random-control group A,0.2%Pozzolan added group B,0.5%Pozzolan added group C and 1.0%Pozzolan added group D group.There were three replicates in each group and each replicate had 4 pigs.During the experiment period,the production performance,pork quality,blood,antioxidant performance and immune performance were measured.The results showed that:(1)Growth performance:Day feed intake of 0.5%Pozzolan addition group and 1.0%Pozzolan addition group were significantly lower than the control group A(P<0.05);The feed/weight ratio of the 1.0%Pozzolan added group was significantly lower than the control group.(2)Dietary nutrient digestibility:The digestibility of dry matter,crude protein and crude fiber of 0.5%Pozzolan added group and 1.0%Pozzolan added group were significantly higher than that of the control group(P<0.05).The digestibility of crude fat of 1.0%Pozzolan group was significantly higher than that in the control group A.(3)Pork quality indicators:The crude fat content and redness of pork of 0.5%Pozzolan group were significantly higher than that of control group A(P<0.05).The shear force of 0.5%Pozzolan group was significantly lower than that of control group A(P<0.05).To 0.2%Pozzolan added group,C14:0 and C18:0 of pork significantly reduced(P<0.05),while C16:1 and C18:2 significantly improved(P<0.05).(4)Blood index:The RBC of 0.5%Pozzolan addition group and 1.0%addition Pozzolan group were significantly higher than that of control group A(P<0.05).There was no significant effect of adding Pozzolan on other routine indexes and biochemical indexes P>0.05).(5)Antioxidant indexes:The activity of T-AOC,SOD and GSH-Px of serum of group D and group B were very significantly higher than those of control group,and the MDA content of serum was significantly lower than control group A.The activity of T-AOC,SOD and GSH-Px of pork of group B and group C were very significantly higher than those of control group;The MDA content in the pork of all experiment groups were significantly lower than that in the control group.(6)Immunization index:Serum IgA levels were very significantly increased of all experiment group(P<0.01).The IgM content in serum of group C were very significantly higher than that of control group(P<0.01).The IgA content in pork of group C were very significantly higher than that of control group(P<0.01).The IgM content in serum of group C and group D were significantly higher than that of control group(P<0.05),and the IgG content were very significantly higher than that of control group(P<0.01).The results showed that Pozzolan Increased the crude fat content in pork and increased the redness of pork at 24 h after slaughter and reduced the shear force.Pozzolan improved the antioxidant and immune properties of finishing pigs.