The effects of different proportions of purple alfalfa on the growth performance,nutrient apparent digestibility,and meat quality of fattening sheep
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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