To investigate the effects of different proportions of alfalfa on the growth performance,nutrient apparent digestibility,and meat quality of fattening sheep.96 healthy and disease-free small tailed Han sheep with an initial weight of(47.50±2.18)kg were selected for the experiment.They were randomly divided into 4 groups using a single factor random grouping method,with 3 replicates in each group and 8 sheep in each replicate.The proportions of corn straw and alfalfa powder in each group of roughage were 3 ∶ 0(control group),2 ∶ 1(experimental group I),1 ∶ 2(experimental group II),and 0∶3(experimental group III),respectively,for a 30 day experimental period.The results showed that:(1)Compared with the control group,the feed to weight ratio of Group I was significantly reduced by 9.19%(P＜0.05),while the average daily weight gain and feed intake of Group II were significantly increased by 22.98%and 9.82%(P＜0.05),and the feed to weight ratio was significantly reduced by 10.70%(P＜0.05).(2)Compared with the control group,the dry matter and calcium digestibility of Group I were significantly improved(P＜0.05),while the dry matter,crude protein,crude fat,and calcium digestibility of Group II were significantly improved(P＜0.05),and the dry matter and calcium digestibility of Group III were significantly improved(P＜0.05).(3)Compared with the control group,experimental group I showed a significant decrease in cooking loss and shear force(P＜0.05),experimental group II showed a significant decrease in drip loss,cooking loss,and shear force(P＜0.05),and experimental group III showed a significant decrease in cooking loss(P＜0.05).Conclusion:The optimal ratio of corn straw and alfalfa powder in the roughage for fattening sheep is 1 ∶ 2,which can improve the growth performance of fattening sheep,improve nutrient apparent digestibility and meat quality.
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