在一个集成的畜牧林业系统中,在夏季期间,奶牛母牛的繁殖发展
Hugo Rocha Sabença Dias1, Agostinho Jorge Dos Reis Camargo2, Gabriela Ferreira Oliveira3
1Faculdade de Veterinária, Universidade Federal Fluminense, Niterói, RJ, Brasil.
Animal reproduction
|November 29, 2023
概括
综合畜牧林业 (ILF) 系统对荷尔斯坦牛犊的压力和生殖发育产生了积极的影响. 然而,Holstein-Gir 3⁄4品种在ILF系统下对生殖参数产生了负面影响.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 环境科学 环境科学
背景情况:
- 综合畜林系统 (ILF) 与单一种植系统相比,具有潜在的环境和动物福利好处.
- 评估不同管理体系对牛群发展的影响对于可持续农业至关重要.
研究的目的:
- 评估ILF系统与全阳光 (FS) 单种植系统对霍尔斯坦和霍尔斯坦-吉尔3⁄4公牛的皮质醇水平,身体和生殖发育的影响.
- 为了比较特定品种对环境管理系统的反应.
主要方法:
- 青春期前的Holstein和Holstein-Gir 3⁄4小母牛在ILF和FS系统中维持了60个夏天.
- 皮质醇水平,体重增加,阴道发育 (肋骨高度和宽度) 和卵巢卵泡群/大小在27个月大时被评估.
主要成果:
- ILF系统改变了霍尔斯坦-吉尔3⁄4公牛的皮质醇水平 (P=0.02),但没有影响任何品种的体重增加.
- 在荷尔斯坦-吉尔3⁄4,ILF公牛的阴道高度降低 (P=0.006),卵巢卵泡数量较低 (P=0.004),而荷尔斯坦公牛的数量较高 (P=0.08).
- 与荷尔斯泰因牛犊相比,荷尔斯泰因Gir 3⁄4动物的体重增加 (P=0.003),发育 (P<0.001) 和平均毛囊大小 (P=0.008) 都优于荷尔斯泰因牛犊.
结论:
- 在27个月后,ILF系统对荷尔斯坦雌牛的压力和生殖参数产生了积极影响.
- 在ILF系统下,在Holstein-Gir 3⁄4公牛中观察到对生殖参数的负面影响,表明了品种特定的反应.
- 两种品种之间在生长和生殖发育方面发现了显著的种族差异,独立于系统.
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