肉繁殖母的体重优化. 肉繁殖母的体重优化. 1. 1. 1. 1. 这是一个很棒的节目. 仔的生长,料的效率,尸体的组成和性成熟
Thiago L Noetzold1, Etseoghena A Obi1, Bryan Fancher2
1Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada.
Poultry science
|October 30, 2024
概括
早期生长策略和青春期生长高峰的时间显著影响肉养殖者雌性生长. 调整早期生长增强了肌肉和骨特征,同时推进生长峰值提高了性成熟度和尸体脂肪.
科学领域:
- 动物科学动物科学
- 禽类的营养和生理学
- 生殖生物学 生殖生物学
背景情况:
- 优化肉养殖者雌性发展对于生殖效率和群体管理至关重要.
- 了解早期生长 (EG) 和青春期最大生长峰值 (I2) 的时间之间的相互作用对于有针对性的育种计划至关重要.
- 目前的生长模型需要改进,以考虑到 brojiler breeders的特定发展阶段.
研究的目的:
- 评估早期成长 (EG) 和最大青春期成长峰值 (I2) 的时间对 brojler breeder 雌性发育的影响.
- 评估这些因素对料效率,尸体成分和性成熟的影响.
- 为了确定罗斯308肉养殖母体的最佳生长轨迹.
主要方法:
- 一个6x2的因数排列使用了六个I2水平 (15-23周) 和两个EG治疗 (EG0和EG20).
- 目标体重 (BW) 轨迹是使用三相戈珀茨模型建立的.
- 288只Ross 308幼从0周到28周通过精密养系统被养;身体成分和其他变量被分析.
主要成果:
- 早期生长 (EG20) 增加了乳房肉的分数,并主要增强了肌肉和骨的特征.
- 提前最大青春期生长峰值 (I2) 的时间加速了性成熟,这是第一个卵的年龄降低所表明的.
- 进步I2从16-28周增加了尸体脂肪沉积,而EG20从4-16周增加了尸体脂肪.
结论:
- 早期生长操纵主要影响肉养殖者雌性肌肉和骨发育.
- 推进青春期的成长峰值显著加速性成熟,增加了尸体脂肪沉积.
- 这些发现为优化生长策略提供了洞察力,以提高 brojiler breeders 的生殖性能.
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