The effect of barley straw on the growth performance,slaughter performance,and meat quality of fattening sheep
To investigate the effects of Barley Straw(BS)on the growth performance,slaughter performance,and meat quality of fattening sheep. 120 healthy and disease-free fattening sheep with similar initial weight and age were selected and randomly divided into 4 groups. The fattening sheep in each group were fed with a full mixed diet according to the Nutrient Requirements for Meat Sheep(NY/T 816-2021). Among them,corn straw(CS)roughage was used as the control(CS group),while the other three groups were replaced with 33.33％(LBS group),66.67％(MBS group),and 100％(HBS group)barley straw in the roughage. Each group had 3 replicates,with 10 rats in each replicate. The experimental period is 30 days. The results showed that:(1)Compared with the CS group,the average daily weight gain of the MBS group was significantly increased by 11.86％(P<0.05),and the feed to weight ratio was significantly reduced by 9.87％(P<0.05). Although the average daily weight gain of the LBS group was higher than that of the CS group and the feed to weight ratio was lower than that of the CS group,there was no intergroup difference(P>0.05).(2)Compared with the CS group,the MBS group showed a significant increase in slaughter rate and eye muscle area(P<0.05);The LBS group showed a significant increase in eye muscle area(P<0.05).(3) Replacing corn straw with different levels of barley straw in roughage had no significant effects on pH value,drip loss,brightness L*,redness a*,and yellowing b*(P>0.05). From this,it can be seen that under the conditions of this experiment,replacing corn straw in roughage with barley straw has no negative impact on the quality of fattening sheep meat. When the substitution level of barley straw is 66.67％,it improves the growth performance and slaughter performance of fattening sheep.
万方数据
维普
