草业学报2012，Vol.21Issue(4)：252-258,7.
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
摘要
Abstract
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<0. 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Key words
lamb/total mixed ration/nutritional level/fatten/digest/slaughter分类
农业科技引用本文复制引用
马友记,王宝义,李发弟,赵有璋,胡祥..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[J].草业学报,2012,21(4):252-258,7.基金项目
国家科技支撑计划项目(2008BADB2B05-07,2011BAD28B05)和国家肉羊产业技术体系(CARS-39)资助. （2008BADB2B05-07,2011BAD28B05）
