甘肃高山细毛羊及其杂种羔羊育肥效果分析

Analysis on the Fattening Performance of Gansu Alpine Merino Sheep and the Hybrid Lambs

为了解祁连山高寒牧区的羔羊育肥效果,给建立天祝县高寒牧区肥羔生产优化体系提供技术支撑。选择甘肃高山细毛羊和波德代(♂)×甘肃高山细毛羊(♀)F1代羔羊(简称波甘F1代)各40只,进行为期60 d的全舍饲高效育肥,系统观测育肥期内2个群体的4类生长结果、5个屠宰性能指标和6个肉品质指标,计算育肥经济效益。结果表明,经60 d短期育肥,波甘F1代平均日增重213.5 g/只,胴体重18.1 kg,屠宰率49.7%,均优于甘肃高山细毛羊。波甘F1代和甘肃高山细毛羊的熟肉率、肉色、剪切力、失水率和pH均无明显差异(P>0.05)。波甘F1代的大理石纹评分为3.73,显著高于甘肃高山细毛羊的2.86(P<0.05)。波甘F1代和甘肃高山细毛羊育肥期内的纯收入分别为308.2、182.0元。可见,2个群体经60 d的短期育肥,均取得了明显的效果,且波甘F1代在育肥期内的生长结果和屠宰性能均优于甘肃高山细毛羊。

In order to understand the fattening performance of lambs in alpine pastoral area of Qilian Mountain so as to provide technical support for establishing an optimization system for fattening lamb production in the alpine pastoral areas of Tianzhu County,40 Gansu alpine merino lambs and 40 F1 lambs from Borderdale(♂)×Gansu alpine merino(♀)(F1 group)were selected to fatten for 60 days in feedlot.4 growth indexes,5 dressing performance indexes and 6 meat quality indexes were measured in these 2 groups,and economic benefits were also calculated when fattening was finished.Results showed that after short-term fattening period of 60 days,the average daily gain,carcass weight and dressing percentage in F1 group were 213.5 g/head,18.1 kg and 49.7%,respectively,which were all superior that those in the alpine merino group.No significantly differences in cooking percentage,meat color,shear force value,water loss percentage and pH value between F1 and Gansu alpine merino groups were detected(P>0.05).However,marbling score of F1 group(3.73)was higher than that of Gansu alpine merino group(2.86)(P<0.05).The net income of F1 and Gansu alpine merino lambs during 60 days of fattening period were 308.2 RMB and 182.0 RMB,respectively.The results suggested that the two groups obtained significant effect upon 60 days of fattening,but the fattening and dressing performance of F1 lambs was better than that in Gansu alpine merinolambs.