Effects of oregano essential oil on growth performance,meat quality,and economic benefits of beef cattle
This experiment was conducted to investigate the effects of different levels of oregano essential oil on the growth performance,meat quality,and economic benefits of beef cattle.Fifty-two healthy Simmental beef cattle with similar body weight were randomly divided into four groups with 13 replicates per group and one beef cattle per replicate.Beef cattle in control group,EO10 group,EO20 group,and EO40 group were fed experimental diets containing 0,10,20,and 40 g/(head·d)oregano essential oil,respectively.The pre-feeding period was one week and the formal test period was 90 days.The results showed as follows:Compared with the control group,the average daily gain of beef cattle in EO20 group was significantly increased by 25.84％(P＜0.05),and the ratio of feed to gain was significantly decreased by 20.28％(P＜0.05),the slaughter rate and net meat rate of beef cattle in EO20 group were significantly increased(P＜0.05),beef pH value in EO20 and EO40 groups was significantly increased(P＜0.05),the meat color a*value was significantly increased(P＜0.05),and the shear force of beef in EO20 group was decreased(P＜0.05),the crude protein,crude fat,and cis oleic acid concentrations of beef in EO20 and EO40 groups were significantly increased(P＜0.05),and the linoleic acid content of beef in EO20 group was significantly increased(P＜0.05).Compared with the control group,the weight gain income of EO10,EO20 and EO40 beef cattle increased by 11.24％,25.84％,and 15.73％,respectively,and the profit increased by 23.28％,56.86％,and 1.50％,respectively.The study indicates that adding 20 g/(head·d)of oregano essential oil to beef cattle feed has the better growth performance and breeding economic benefits.
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