肉繁殖母的体重优化. 肉繁殖母的体重优化. 2. 2. 2. 这是一个很棒的节目. 生殖表现的表现生殖表现的表现
Thiago L Noetzold1, René P Kwakkel2, Bryan Fancher3
1Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada T6G 2P5.
Poultry science
|September 27, 2025
概括
提前将肉养殖的生长时间推迟到青春期前阶段 (早期生长;EG) 改善了生殖表现. 早期的最大青春期生长 (I2) 显著增加了卵产量和小数量.
科学领域:
- 动物科学动物科学
- 禽畜科学 禽畜科学 禽畜科学
- 生殖生物学 生殖生物学
背景情况:
- 肉养殖家的生殖性能对于家禽业至关重要.
- 增长轨迹,包括早期增长 (EG) 和青春期最大增长的时间 (I2),可以影响生理发育和生产力.
研究的目的:
- 评估从青春期转移增长到青春期前期 (EG) 的影响,以及改变青春期最大增长时间 (I2) 对 brojler breeder 的表现的影响.
- 评估对体重 (BW),料效率,尸体组成和生殖结果的影响.
主要方法:
- 一个6x2的因数实验使用了12个体重 (BW) 目标轨迹,通过修改罗斯308只母 (0-60周) 的戈珀茨模型系数来创建.
- 治疗包括六个I2水平和两个EG水平 (EG0:标准增益;EG20:20%的第二阶段增益转移到第一阶段).
- 用三向ANOVA和协差分析分析数据.
主要成果:
- 早些时候,I2与背部羽毛得分的下降有关.
- 蛋产量,蛋重量和蛋质量与较早的I2.2相比增加.
- 产生的总蛋和每只母估计的小数量也增加了,较早的I2.
结论:
- 提前体重增加到青春期前阶段 (EG) 和早些时候的最大青春期增长 (I2) 在 brojler繁殖的繁殖效率产生积极的影响.
- 早些时候,I2显著提高了蛋和小的生产,强调了增长阶段优化对繁殖母生产力的重要性.
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