Effects of Chromium Methionine Supplementation wit

Authors: Xiao Xu Li Liu ShenFei Long XiangShu Piao Terry L Ward Fei Ji

Publish Date: 2017/01/21

Volume: 179, Issue: 1, Pages: 70-78

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Abstract

This experiment was conducted to evaluate the effects of chromium methionine with/without zinc sulfate or zinc amino acid complex on the growth performance carcass traits meat quality serum parameters endocrine parameters and antioxidant status of growingfinishing pigs A total of 180 320 ± 17 kg body weight BW crossbred pigs Duroc × Landrace × Yorkshire were used in a completely randomized design with three dietary treatments and 10 replicates per treatment five pens of barrows and five pens of gilts with six pigs per replicate Three treatments were cornsoybean mealbased diets supplemented with 100 mg Zn/kg from zinc sulfate ZnSO4 100 mg Zn/kg from ZnSO4 + 02 mg Cr/kg from chromium methionine complex CrMet or 50 mg Zn/kg from ZnSO4 + 50 mg Zn/kg from zinc amino acid complex ZnAA + 02 mg Cr/kg from CrMet respectively The experiment lasted 105 days of which was divided into three stages including phase 1 30 to 50 kg BW phase 2 50 to 80 kg BW and phase 3 80 to 110 kg BW Results showed that supplementation with CrMet and ZnAA improved P  005 the feed conversion of the pigs in phase 2 phase 3 and the overall experiment Hot carcass weight dressing percentage and a longissimus dorsi muscle area were increased P  005 in pigs fed with diets supplemented with both CrMet and ZnAA compared with pigs fed with diets containing only ZnSO4 P  005 There was also an increase P  001 pH24 h in the longissimus dorsi muscle in pigs fed with diets supplemented with CrMet and ZnAA The concentration of serum glucose in pigs fed with diets containing CrMet and ZnAA was decreased P  005 compared with that in pigs fed with the diet containing ZnSO4 Supplementation with CrMet and ZnAA increased P  005 the circulating levels of insulin and decreased P  005 cortisol There was an increase P  005 in total serum antioxidant capacity and Cu/Zn superoxide dismutase activity as well as a decrease P  005 in serum malondialdehyde concentrations in pigs fed with diets supplemented with CrMet and ZnAA compared with pigs fed with the diet supplemented only with ZnSO4 In conclusion supplementation of CrMet only or CrMet together with ZnAA improved feed conversion carcass traits and meat quality in the growingfinishing pigs

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