畜牧林业综合系统减轻了牛卵细胞中有害的热应激效应
Clara Slade Oliveira1, Hugo Rocha Sabença Dias2, Agostinho Jorge Dos Reis Camargo3
1Embrapa Dairy Cattle, 610 Eugenio do Nascimento Ave., Juiz de Fora, MG 36038-330, Brazil.
Animal reproduction science
|August 6, 2024
概括
综合畜牧森林 (ILF) 系统可以减少热量压力在热带乳牛. 与全太阳系统相比,ILF系统可以改善卵细胞质量并减轻高热症,有利于生育能力.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 适应气候变化 适应气候变化
背景情况:
- 全球变暖和热量压力对热带乳牛的生育能力产生负面影响.
- 综合畜牧林业 (ILF) 系统为减轻这些影响和减少环境影响提供了一个潜在的战略.
研究的目的:
- 评估全阳 (FS) 与ILF系统对母体高温和荷尔斯坦和吉罗兰多公牛卵细胞质量的影响.
- 评估ILF系统在热带夏季管理热压力的有效性.
主要方法:
- 在FS和ILF系统中的母牛之间比较阴道温度和卵细胞质量参数 (直径,IGFBP2,caspase3).
- 监测温度湿度指数 (THI) 以量化热应激水平.
- 对生理和生殖参数的品种 (霍尔斯坦,吉罗兰多) 和系统影响的分析.
主要成果:
- 强烈的热应力被高THI值证实.
- 对于FS系统和霍尔斯坦品种来说,热量过高的情况更大.
- 卵细胞质量,以直径和IGFBP2水平来表示,在ILF系统中优越.
- 在两种品种的ILF系统中,卡斯帕酶3水平,这是细胞亡的标志物,下降了.
结论:
- 在热带夏季条件下,ILF系统有效地减轻母体高温症,并改善乳牛母牛的卵细胞质量.
- ILF系统是提高乳牛生育能力和应对气候变化的可行策略.
- 在FS系统中的动物可能会对长时间的热暴露产生适应性反应.
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