Effects of curcumin on growth performance,meat quality,and economic benefits of finishing pigs
The purpose of the experiment was to investigate the effects of different levels of curcumin on the growth performance,meat quality,and economic benefits of finishing pigs,so as to determine the suitable level of curcumin in finishing pigs.According to single factor design,160 healthy finishing pigs weigh about 60 kg were selected and divided into four groups,with five replicates in each group and eight finishing pigs in each replicate.Finishing pigs in control group were fed with basal diets without curcumin,while those in curcumin group were fed with experimental diets with 250,500,and 1 000 mg/kg curcumin,respectively.The pre-test period was one week,and the formal test period was eight weeks.The results showed that compared with the control group,500 mg/kg and 1 000 mg/kg of curcumin groups significantly increased the final weight and average daily gain of finishing pigs(P＜0.05),and significantly decreased the feed to gain ratio(P＜0.05),significantly increased preslaughter live weight,slaughter rate,and eye muscle area(P＜0.05),and significantly reduced backfat thickness(P＜0.05).Compared with the control group,250,500,1 000 mg/kg curcumin groups significantly the carcass weight and lean meat percentage(P＜0.05).Compared with the control group,500 mg/kg and 1 000 mg/kg curcumin groups significantly decreased the pH value of muscle(P＜0.05),significantly decreased the shear force and drip loss of longissimus dorsi muscle(P＜0.05),and significantly increased the a*value of muscle(P＜0.05).250,500,1 000 mg/kg curcumin groups significantly increased the intramuscular fat content of longissimus dorsi muscle(P＜0.05).Compared with the control group,the weight gain benefit of 250,500,1 000 mg/kg curcumin groups increased by 4.71％,9.97％,and 10.94％respectively,and the breeding profit increased by 10.92％,22.56％,and 22.48％respectively.The study indicates that curcumin can improve the growth performance,meat quality,and breeding profit of finishing pigs,and 500 mg/kg curcumin has the better breeding effect on finishing pigs.
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