• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Effect of male broiler breeder feeding programs on growth, reproductive performance, and broiler progeny.
【24h】

Effect of male broiler breeder feeding programs on growth, reproductive performance, and broiler progeny.

机译：雄鸡种鸡饲养计划对生长，繁殖性能和肉鸡后代的影响。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Four studies were conducted to evaluate the effects of different feeding programs during rearing and production on broiler breeder male growth, fertility, and progeny performance. In Experiment I, the effects of two levels (High and Low) of cumulative nutrient intake during the rearing period to photostimulation at 21 wk of age through different dietary formulations or feeding programs were evaluated. The High cumulative nutrition program supplied 33.5 Mcal ME and 1,730 g CP, while the Low cumulative nutrition program supplied 29.6 Mcal ME and 1,470 g CP. At 21 wk of age in Experiment I-2, males were classified into Heavy or Light BW groups. A cumulative nutrient intake during the rearing period of 29.6 Mcal ME and 1,470 g CP, regardless of diet or feeding program resulted in a male of adequate BW that was able to maintain good fertility throughout the production period and produce broilers with increased 42-d BW. In Experiment III, two levels of dietary CP (12% and 17%) and two feeding programs (Concave and Sigmoid) were evaluated during the rearing period to 26 wk of age. The Concave or 17% CP treatments were unable to sustain fertility after 40 wk of age without an increased allocation of feed. In Experiments II, two antioxidant levels and different source of selenium were evaluated during the production period. In Experiment IV different feeding programs from 16 to 26 wk of age and during the production period were evaluated. The data showed that feed allocation relative to BW affected fertility more than did antioxidant inclusion. Furthermore, slow and consistently increasing feed increments from 16 to 26 wk of age and during the production period improved fertility and favorably impacted progeny performance. In conclusion, when males failed in accumulate adequate nutrients during the rearing period or gain adequate BW, as an indication of ME allocation, after photostimulation fertility declined and significant negative effects were observed in progeny performance.; Key words. antioxidant, broiler performance, fertility, photostimulation
机译：进行了四项研究，以评估饲养和生产过程中不同饲喂方案对肉鸡种鸡雄性生长，繁殖力和后代性能的影响。在实验I中，评估了饲养期间两个水平（高和低）的累积营养摄入量对21周龄通过不同饮食配方或喂养程序进行光刺激的影响。高累积营养计划提供了33.5麦卡尔ME和1,730 g CP，而低累积营养计划提供了29.6 Mcal ME和1,470 g CP。在实验I-2中，在21周龄时，雄性被分为重或轻体重组。不论饮食或饲喂程序如何，在饲养期间累积29.6 Mcal ME和1470 g CP的养分摄入量可使雄性BW足够，能够在整个生产期间保持良好的繁殖力，并生产出42 d BW增加的肉鸡。在实验III中，在饲养至26周龄期间评估了两个水平的日粮CP（分别为12％和17％）和两个喂养程序（凹和乙状结肠）。在不增加饲料分配的情况下，凹型或17％CP处理在40周龄后无法维持生育能力。在实验II中，在生产期间评估了两种抗氧化剂水平和不同来源的硒。在实验IV中，评估了16至26周龄以及在生产期间的不同饲喂程序。数据显示，相对于体重而言，饲料分配对生育能力的影响要大于抗氧化剂的摄入。此外，从16周龄到26周龄的缓慢且持续增加的饲料增量以及在生产期间提高了生育能力，并有利地影响了子代性能。总之，当雄性在饲养期间未能积累足够的营养或不能获得足够的体重时，作为光合作用分配的指标，光刺激后的生育力下降并在子代表现中观察到显着的负面影响。关键字抗氧化剂，肉鸡性能，繁殖力，光刺激

著录项

  • 作者

    Romero-Sanchez, Hugo.;

  • 作者单位

    North Carolina State University.;

  • 授予单位 North Carolina State University.;
  • 学科 Agriculture Animal Culture and Nutrition.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 190 p.
  • 总页数 190
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 饲料;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号