中国畜牧兽医2011，Vol.38Issue(11)：8-13,6.
前期营养水平对羔羊两阶段育肥效果的影响
The Effects of Prophase Nutrition Level on the Performance of Lambs in a Two Phase Finishing Scheme
摘要
Abstract
This experiment was conducted to investigate the effects of prophase nutrition level on the performance of lambs in a two phase finishing scheme. Eighty Mongolian lambs (castrated lambs) were randomly divided into four equal groups: control group (CG) = fed ad libitum (ME:10. 88 MJ/kg, CP:15%)( moderate restricted groups (RG1 and RG2) = fed restricted (ME:10. 88 MJ/kg, CP:10% and ME:9. 41 MJ/kg, CP10% respectively); severe restricted group (RG3) = fed restricted (ME:8. 62 MJ/kg, CP:5. 7%). The lambs were fed restricted diets for 60 days and followed by compensatory growth with the same diet (ME:9. 75 MJ/kg, CP:12%) for each group. The changes of body weight,growth rate,dressing percentage, net percentage of carcass, meat-bone ratio, meat percentage of carcass, eye muscle area and GR value were measured during feed restricted and compensatory periods. The results showed that the BW of CG were significantly higher than those of RG1 and RG2(P<0. 05) ,and significantly higher than those of RG3(P<0.01) by the end of feed restricted period. The dressing percentage,net percentage of carcass,meat-bone ratio,meat percentage of carcass,eye muscle area and GR value of CG were higher than those of RG1, RG2 and RG3 because of the feed restriction. The growth rate of RG3 were significantly higher than those of CG(P<0. 05)and the BW,dressing percentage, net percentage of carcass, meat-bone ratio, meat percentage of carcass of RG1,RG2 and RG3 gradually approuched to CG and the eye muscle area and GR value of four groups had no significant difference(P>0. 05) by the end of the feed compensation. The results indicated that the Mongolian lambs expressed different compensatory potency after nutrient restriction with defferent levels of energy and protein, suggesting that protein restriction had more negative effects than energy restriction in lambs. The lamb's growth were more affected by protein during feed restricted period, whereas the supplement of enegy was more important for lamb's growth during feed compensatory period.关键词
营养水平/补偿生长/羔羊/体重/产肉性能Key words
nutrition level: compensatory growth: lambs/ body weight/ meat-production分类
农业科技引用本文复制引用
张崇志,高爱武,杨金丽,侯先志,考桂兰,刘小刚,李东,黄雅娟..前期营养水平对羔羊两阶段育肥效果的影响[J].中国畜牧兽医,2011,38(11):8-13,6.基金项目
国家自然科学基金资助项目(30860194). （30860194）
