Effects Of Cysteamine And Chromium Yeast On Performance And Meat Quality In Finishing Pigs

The effects of Cysteamine (CS) and Chromium Yeast (CrY) on performance, neurohormone, lipid metabolism and carcass characteristics were studied in finishing pigs. Seven-two Duroc ×Landrace-Yorkshire finishing pigs of original average weight 47.39±1.01kg were divided into four groups with three replicates, each of which including 6 pigs, in a randomized block design. The four groups were fed with corn-soybean basic diet (group CT), containing 600 mg/kg CS (group CS), containing 200 μg/kg CrY (group CrY), containing 600 mg/kg CS and 200 μg/kg (group CS+CrY), respectively. The result as follows: (1) Average daily gain (ADG) in group CS and group CS+CrY were higher than that in group CT (P>0.05), that in group CrY was lower than that in group CT (P>0.05). Average daily feed intake (ADFI) and feed/gain (F/G) in group CS, CrY and CS+CrY were lower than that in group CT (P>0.05). The contents of blood urea nitrogen (BUN) in group CS, CrY and CS+CrY were lower than that in group CT (P>0.05). (2) Compared with the group CT, the group CS and CrY improved the content of serum growth hormone (GH), free T4 (FT4), and the ratio of FT3/FT4 (P>0.05), the group CS+CrY increased significant the content of GH and the ratio of FT3/FT4 (P<0.05),decreased significant the content of FT4(P<0.05).The group CrY improved the content of serum FT3(P>0.05),the group CS and CS+CrY increased significant the content of serum FT3(P<0.05). The group CS, CrY and CS+CrY improved the content of serum Glu (P>0.05) and significant decreased the content of serum Ins (P<0.05),but the group CS tended to improve the ratio of Glu/ Ins(P>0.05),the group CS+CrY significant increased the ratio of Glu/ Ins (P<0.05). (3)Compared with the group CT, the group CS, CrY and CS+CrY intended to decrease the contents of serum total cholestriol (TC) and triglyceride (TG) (P>0.05), and increased the contents of serum high density lipoprotein(HDL) (P>0.05),the group CS and CS+CrY had dropped on the contents of low density lipoprotein(LDL) (P>0.05), the group CrY and the group CT were the same in the above. The group CS, CrY and CS+CrY intended to...