The effects of different levels of alfalfa polysaccharides in feed on growth performance,antioxidant indicators,and meat quality of meat sheep
To investigate the effects of different levels of alfalfa polysaccharides(APS)in feed on the growth performance,antioxidant indicators,and meat quality of meat sheep.Sixty healthy Hu sheep with similar age(around 120 days)and an initial weight of 25.60±1.62kg were selected and randomly divided into four groups.Each group of meat sheep was fed with basic diet+0,200,400 and 600 mg/kg of alfalfa polysaccharide,and recorded as APS0 group,APS1 group,APS2 group,and APS3 group.Each group had 3 replicates,with 5 meat sheep in each replicate.The experimental period is 60 days.The results showed that:(1)Compared with the APS0 group,the APS2 group significantly increased the final weight by 11.52% (P＜0.05),and the average daily weight gain by 22.66% (P＜0.05).The feed weight ratio of APS1 group,APS2 group,and APS3 group significantly decreased by 6.13%,14.55%,and 9.04% (P＜0.05);(2)Compared with the APS0 group,the APS2 and APS3 groups showed a significant increase in total antioxidant capacity in the serum of sheep(P＜0.05),a significant decrease in malondialdehyde content(P＜0.05),and a significant increase in serum superoxide dismutase activity in the APS1,APS2,and APS3 groups(P＜0.05);(3)Compared with the APS0 group,the drip loss of APS2 and APS3 groups was significantly reduced(P＜0.05),and the cooked meat rate was significantly increased(P＜0.05).From this,it can be seen that adding an appropriate level of alfalfa polysaccharides to the diet can improve the growth performance of meat sheep,improve their antioxidant indicators and meat quality.The appropriate level of alfalfa polysaccharides added to the diet of meat sheep is 400 mg/kg.
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