Effect Of Cysteamine On Production Performance, Serum Biochemical Indices, Intestine Development And Meat Quality Of Growth Meat Rabbits

The experiments were designed to investigate the effect of CSH supplemented continuously on growth performance,serum biochemical Indices,intestine development and meat quality of growth meat rabbits.A total of 160 rabbits(45 d old,female:male=1:1) were randomly divided to five groups,fed with the basal diet supplemented with 0,60,90,120,150mg/kg CSH respectively 30 days.The results showed of follows:1.The diet added with CSH increased the rabbits production performance,Especially the combination of 90 mg/kg.In comparison with the control group,the average daily gain of group 2,group 3 and group 4 increased by15.78%(P<0.01),9.68%(P<0.01),3.7%(P<0.05) respectively;average daily feed intake of group 2 increased by 5.12%(P<0.01);feed conversion rate of group 2 and group 3 decreased by 9.1%(P<0.01),7.67%(P<0.01) respectively;2.The diet added with CSH increased the levels of TP,ACP,AKP,TC,decreased the levels of BUN in serum.In comparison with the control group,the ALB of in blood,group 1,group 2,group 3 and group 4 increased content of ALB by 10.87%(P>0.05),39.57% (P<0.01),27.90%(P<0.01) and 24.64%(P<0.01) respectively;the GOT of groupl and group2 decreased by 20.62%(P<0.05),21.48%(P<0.05) respectively;the GH of group 1,group2,and group3 increased by 21.59%(P>0.05),31.89%(P<0.01),9.62%(P>0.05) respectively,group 4 decreased by 2.75%(P>0.05);3.The diet added with CSH increased the activities of duodenal mylolytic enzyme;In comparison with the control,the activities of duodenal amylolytic enzyme group 1,group 2 and group 3 increased by 10.17%(P>0.05),14.07%(P>0.05),1.19%(P>0.05) respectively, group 4 decreased by 0.17%(P>0.05);the activities of duodenal proteolytic enzyme group 1 and group 2 increased by 1.87%(P < 0.05),0.09%(P>0.05) respectively,group 3 and group 4 decreased by 2.94%(P>0.05),3.38%(P>0.05)respectively;4.The diet added with CSH increased the height of intestinal villus in duodenum,jejunum, ileum and cecum,when added the CSH over the 90mg/kg may depress the height,added to 150mg/kg depressed the height obviously;the change of intestine thickness from duodenum, jejunum and ileum had no regularity,the thickness from cecum were lower than the control group;5.The diet added with CSH depressed the water content and ash content,increased the crude protein content of the rabbit meat,but every group difference is not notable in improving(P>0.05);In comparison with the control group,the crude fat content of group 1, group2,group3 and group4 increased by 5.43%(P<0.01),9.57%(P<0.01),9.87%(P<0.01), 9.12%(P<0.01) respectively.This has important significance on improving meat quality;6.Added 90 mg/kg CSH can gain the best economic effect,profit improved 49.41%than the control group.