This study was carried out to evaluate the effect of supplemental concentrate on plasma anti-oxidative stress capability and biochemical metabolites of Guizhou black goats. Forty-five Guizhou black growing goats were randomly allocated to 3 groups of 3 replicates, with each of 5 goats.They were fed diets of control, treatment 1, and treatment 2, respectively. The control was fed the conventional diet, containing 0.1 kg concentrate and 0.35 kg DM/d forage, respectively. Treatment 1 and treatment 2 were supplemented with 300g and 600g concentrate. The experiment lasted 31 d with 7-day pretrial duration and 24-day trial duration. Blood samples were taken on d 7, 16, 25, and 31 and were centrifuged to obtain plasma for determination of anti-oxidative stress capacity and biochemical parameters.The results showed that 1) compared with the control, treatment 1 and treatment 2 resulted in higher plasma T-AOC, SOD, H2O2, and GSH-Px (P<0.05) and decreased MDA levels (P<0.05). 2) Plasma UN in treatment 1 was lower than that of control (P<0.05); 3) However, plasma AST and lipid metabolites were unaffected among the control, treatment 1, and treatment 2 (P>0.05). It was suggested that, under the current condition of low nutrients provision, increasing concentrate to forage ratio could significantly enhance plasma anti-oxidative stress capability, was beneficial to protein utilization, and had no negative effect on liver function. There was no difference for plasma lipid metabolites for growing goat fed diets with increasing concentrate.
Key words
increasing concentrate /
anti-oxidative stress capability /
biochemical metabolites /
goat
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