尼洛尔和杂交牛犊的身体发育,消化行为和生理反应
C S Santos1, A R D L Souza1, A L J Ferraz1
1Department of Animal Science, Mato Grosso Do Sul State University, Aquidauana, Brazil.
Tropical animal health and production
|June 9, 2025
概括
杂交Nelore和Angus/Senepol牛可以提高热带气候的产量. 与纯种的Nelore相比,杂交的公牛表现出更高的平均日益和身体发育,这表明牛肉生产的成功策略.
科学领域:
- 动物科学动物科学
- 遗传学 遗传学 是一个
- 热带农业 热带农业
背景情况:
- 牛适应热带条件,但可能在生长性能上有局限性.
- 杂交是一种常见的策略,用于结合不同品种的理想特征.
研究的目的:
- 为了比较Nelore和杂交 (Nelore × Angus/Senepol) 雌牛的身体发育,消化行为和生理反应.
- 评估杂交的有效性,以改善热带环境中的牛产量.
主要方法:
- 使用了20只 (12个月大) 雌牛,分为Nelore (n=11) 和杂交 (F1 Nelore × Angus/Senepol) (n=9) 组.
- 采用随机块设计来评估身体尺寸,平均每日增益,消化行为和生理参数.
主要成果:
- 杂交的公牛表现出显著更高的胸部深度和平均每日收益 (P < 0.05).
- 尼洛尔公牛表现出更大的身高测量 (前腿,部,后长度,下) 和更高的出汗率 (P < 0.001).
- 消化行为有所不同,内罗尔雌牛花费了更多时间食和置,而杂交雌牛喝了更多的水.
结论:
- 杂交Nelore和Angus/Senepol显著提高了生产性表现,特别是每日平均收益.
- 包括呼吸和心率在内的生理反应在基因型之间相似,这表明杂交是热带牛生产的可行策略.
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