适当延长育肥期对沃金黑牛阉公牛产肉性能的影响

The effects of properly extending fattening period on meat performance of woking black steers

目的研究适当延长育肥期对沃金黑牛阉牛产肉性能的影响。方法选取体重相近、体况良好的12月龄的沃金黑牛阉牛60头,随机分为2组(对照组和试验组),每组30头,统一标准饲养条件单栏饲喂,对照组育肥至30月龄,试验组育肥至36月龄,全部屠宰,测定产肉性能。结果36月龄组较30月龄组,宰前活重、胴体重、净肉率和肌间脂肪厚度均显著提高(P<0.05),而屠宰率、眼肌面积和背膘厚度均差异不显著(P>0.05);嫩度显著提升(P<0.05);保水性能提升,但差异不显著(P>0.05)。结论适当延长育肥期可以提高沃金黑牛阉公牛的屠宰性能,改善肉色和嫩度。

In order to study the effect of prolonged fattening period on meat production performance of wojin black cattle 60,12-month-old Woking black steers with similar body weight and good body condition were randomly divided into two groups(control group and experimental group)with 30 head in each group,the control group was fattened up to 30 months old,and the treatment group was fattened up to 36 months old.The results showed that the premortem live weight,carcass weight,net meat rate and intermuscular fat thickness of the 36-month-old group were significantly higher than those of the 30-month-old group(P<0.05),but the slaughter rate,eye muscle area and backfat thickness were not significantly different(P>0.05)The tenderness increased significantly(P<0.05)and the water-holding capacity increased,but the difference was not significant(P>0.05).In conclusion,proper prolongation of fattening period can improve slaughter performance and meat color and tenderness of wojin black steers.