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首页> 外文会议>Annual^Conference of The New^Zealand^Society^of^Animal^Production >BRIEF COMMUNICATION: Impacts of live weight of ewe lambs at mating on their reproductive performance
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BRIEF COMMUNICATION: Impacts of live weight of ewe lambs at mating on their reproductive performance

机译：简要沟通：母羊羊羔活力的影响在他们的生殖性能交配时

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This experiment investigated the impacts of heavier live weight of twin-born ewe lambs at mating on reproductive performance. Romney ewe lambs (n=270) were allocated to one of two groups: 'Heavy' (48.0±3.8 kg), had been preferentially fed from weaning to breeding, or 'Control' (44.8±3.5 kg). Both groups were exposed to crayon-harnessed vasectomised rams for 68 days before breeding, and then were bred to entire Romney rams for 34 days. Crayon marks were recorded every 17 days. Heavy ewe lambs were more likely to be mated in the first 17 days of breeding (69.9% vs. 54.8%, PO.05), mated in the entire breeding period (85.1% vs. 69.4%, P<0.01) and had a greater litter size (0.99 vs. 0.65; P<0.01) than did Control ewe lambs. Heavier live weight at mating improved reproductive performance of ewe lambs. These results emphasise the importance of an adequate live weight at breeding for reproductive success in ewe lambs.
机译：该实验调查了较重的双向母羊羊羔的影响对生殖性能的影响。 Romney Ewe Lambs（n = 270）分配给两组中的一个：'重'（48.0±3.8千克），优先从断奶喂养，或“控制”（44.8±3.5千克）。两组在繁殖前68天暴露于蜡笔利用的衍生体rams，然后培育到整个Romney Rams 34天。每17天记录蜡笔标记。在整个繁殖期（85.1％与69.4％，P <0.01）中，重型母羊羔羊更有可能在繁殖的前17天（69.9％vs.5.8％，PO.05）进行交配（85.1％，P <0.01）并有一个更大的凋落物尺寸（0.99与0.65; P <0.01），而不是控制ewe羊羔。交配较重的活重，改善了ewe羊羔的生殖性能。这些结果强调了在母羊羊羔中育种生殖成功的适当活力的重要性。

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