【摘要】 四年中选用199只2岁龄妊娠母湖羊作为试验组,在妊娠期127-147日龄时按妊娠湖羊饲养标准规定的代谢能量减少到73.3±6.5%以限制营养。结果甲级羔皮率提高到47.5±6.9%;而不采用限制营养措施的对照组,510只母羊的甲级羔皮率仅为25.8±8.3%,后者系本品种选育的结果。由此证明在提高湖羊甲级羔皮率上,本研究采用的限制营养枝术有重要的作用。此种作用与湖羊本品种选育的作用是可以区分的,但也是可加性的,两法相辅相加可以更高地提高湖羊甲级羔皮率。更多还原

【Abstract】 For four years, nine feeding experiments were conducted including 199 two-yearold ewes in the experimental groups in which the restricted feeding between 127th and 147th days of pregnancy was practiced. The daily metabolizable energy intake of the ewes should be reduced to 73.3±6.5% of the requirement stipulated in the Feeding Standard of Hu-sheep. As a result, the average percentage of Grade A lamb pelts was increased to 47.5±6.9% in the experimental groups while that of the control groups consisting of 510 ewes was only 25.8±8.3%, which was the result achieved in this breed by selection only. It indicated that the restricted feeding during late pregnancy was an important factor in increasing the percentage of Grade A lamb pelts of Hu-sheep in addition to the contribution made by the selection and breeding method. The effects of nutrition and genetics were complimentary and could also be differentiated from each other in this case.更多还原