The Effect Of Performance,Physiochemical Target And Immunity On Growing Pigs By Yeast Iron

The experiment was conducted to study the effect of performance, immune function, biophysical, biochemistry and the content of iron in tissues of growing pigs; To discuss the appropriate amount of yeast iron for growing pigs.The experiment was designed at completed random of single factor, twenty growing pigs from 7 to 10 weeks were selected and divided into 5 groups, each group was further divided into 4 subgroups. Every growing pig was fed three times a day and drunk freely in their own fold. The whole experiment period was divided into two parts ,one part was pre-experiment which was 7 days and another part was formal experiment which was 21 days .The growing pigs in control one were fed a basic diet with Fesou4(Fe,150mg/kg)and the experimental group â…  , â…¡, â…¢, â…£ were fed the basic diet supplemented with 30mg/kg , 60 mg/kg, 150 mg/kg, 300 mg/kg yeast iron . The growing pigs were weighted in the first day and the last day of formal experiment. Wrote down the feed take , diarrhea rate of every growing pig in this period to study the performance. And from the front of vein to get the fresh blood at every first day from 7 to 10 weeks. In order to analyze immune function , physiochemical parameters of growing pigs .After experiment chosen two pigs in every group to slaughter for determining the content of iron in tissues and organs and carcass quality of growing pigs.The result of performance showed :(1)There was no significant difference in average daily gain, average feed gain , F/G, diarrhea rate between every groups (P>0.05) . However the group â…¡ was a better one than other groups ; Compare with the control one which increased 2.40 percent in average daily gain. In average feed gain, every groups were higher than control one except group â…  and it will improve with the improvement of yeast iron of strengths. In F/G, the group â…¡ with 60 mg/kg yeast iron was a lowest one, but comparing with the control one which was ascended 5.38 percent . In diarrhea rate, every group had a lower percent than the control one except groupâ…£.(2) In immunity : with PHA to stimulate T lymphocyte, LPS to stimulate B lymphocyte and did E-rosette formation experiment so as to survey the immune function about yeast iron to growing pigs. The result showed that suitable yeast iron could improve the T, B lymphocyte proliferation rate, E-rosette formation rate and index of immune organs ,the result was 150mg/kg yeast iron had the best immunity function. (3)There were no significant different among every group in total biophysical andbiochemical indexes about red blood cell > white blood cell numbers > the content of HB, HCT and W-SCR, and the 150mg/kg yeast iron has the best result. From 7 to 10 weeks there was not a significant regulation in the activity of CAT. But 150mg/kg yeast iron can improve the activity of SF and the activity of TBBC was descended. So 150mg/kg yeast iron has a slightly function in rising biophysical and biochemical indexes of growing pigs. (4)As regard as the result of slaughter and analysis of pork quality, There were no significant different among every groups (P>0.05) .But 300mg/kg yeast iron was a better one in improving slaughter rate-. area of eye-muscle, dorsal fat > leant length this four indexes. And there was a linear correspondence with supplement of the amount of yeast iron. So 300mg/kg yeast iron has a better function compared with the control one in rising slaughter indexes. Because growing pigs were only ten weeks, so the muscle color was from 1 to 2,and there were no marble variety. Generally speaking 300mg/kg yeast iron was a better one in carcass quality.(5)Analyzing the content of iron in some tissues and organs were showed that there were no significant different among every experimental groups and the control one (P>0.05 ); A large of Fe was excreted from feces, and Fesom was the highest one for the content of iron in feces. Compared with the groupIVwhich increased 46.33 percent. Largely there were spleen > liver > kidney > muscle > toe bone-, And with the improvement of content of yeast iron in diet which had the improvement tendency about the content of iron in tissues and organs.To sum up : yeast iron (Fe,60mg/kg)can improve average daily gain-, average feed gain, but reduced F/G and diarrhea rate. The appropriate accession to growing pigs was 150mg/kg yeast iron in improving their lymphocyte proliferation rate. 150mg/kg yeast iron was better than Fesou4 in rising biophysical and biochemical indexes. 300mg/kg yeast iron was a better one about carcass quality. About the ability in absorbing iron , tissues and organs contained more Fesou4(Fe, 150mg/kg)than yeast iron.