不同营养水平全混合日粮对舍饲育肥羔羊生产性能、养分表观消化率和屠宰性能的影响  

Effects of different nutrition levels in total mixed rations on production performance, apparent digestibility,and slaughter performance in yard feeding lambs

作　　者：马友记[1] 王宝义[1] 李发弟[1] 赵有璋[1] 胡祥[1] 

机构地区：[1]甘肃农业大学动物科技学院,甘肃兰州730070

出　　处：《草业学报》2012年第4期252-258,共7页Acta Prataculturae Sinica

基　　金：国家科技支撑计划项目(2008BADB2B05-07;2011BAD28B05);国家肉羊产业技术体系(CARS-39)资助

摘　　要：为了研究3种营养水平(A1-0.7×NRC、A2-0.8×NRC、A3-0.9×NRC)全混合日粮对舍饲羔羊生产性能、养分表观消化率和屠宰性状的影响,本试验选择48只南非肉用美利奴×甘肃高山细毛羊杂交一代羔羊,随机分为3个处理组,进行为期60d的育肥试验。结果显示,在全混合日粮饲喂技术下,饲喂A2、A3营养水平日粮组的羔羊全期平均日增重极显著高于A1营养水平组(P<0.01),A2和A3营养水平组差异不显著(P>0.05),公羔全期平均日增重极显著高于母羔(P<0.01);A因子对钙、总磷、中性洗涤纤维、酸性洗涤纤维消化率均有极显著影响(P<0.01),性别仅对钙、总磷消化率有极显著影响(P<0.01),但营养水平与性别没有显著交互作用(P>0.05);营养水平对育肥羔羊的屠宰性能没有显著影响(P>0.05),但杂种羔羊的屠宰率、熟肉率、眼肌面积等高于甘肃高山细毛羊。以上结果表明采用0.8×NRC营养水平全混合日粮育肥南非肉用美利奴×甘肃高山细毛羊杂交一代羔羊较为适宜,在同一营养水平下,公羔生长性能优于母羔。The effects of three nutrition levels （A1, 0.7 × NRC, A2, 0.8 × NRC, A3, 0. 9× NRC） in total mixed rations on production performance, apparent digestibility and slaughter performance was evaluated. Forty-eight lambs [SA Mutton Merino（ ♂ ） × Gansu alpine fine wool sheep （-♀）] were randomly divided into three groups for a two months feeding trial. The average daily weight gains of the A2 and A3 groups were significantly （P〈C0.01） higher than that of the A1 group. There was no significant difference between A2 and A3. The average daily gain of ram lambs was significantly （P〈0.01） higher than that of ewe lambs. Different nutrition levels had significant effects on apparent digestibility of Ca, total phosphorus （TP）, neutral detergent fibre （NDF） and acid detergent fiber （ADF） （P〈0.01）. Sex factors had significant effects on apparent digestibility of Ca and TP （P〈0.01）. There were no difference in slaughter indexes （P〈0.05） but the slaughter rate, cooking rate and loin eye area of hybrid lambs were significantly higher than those of Gansu alpine fine wool sheep. In summary, the 0.8 × NRC nutritional level was better for fattening hybridized lambs of crossed SA Mutton Merinos, and ram lambs grew better than ewe lambs at the same nutritional levels.

关 键 词：羔羊 全混合日粮 营养水平 育肥 消化 屠宰 

分 类 号：S826.4[农业科学—畜牧学]