沙罗莱斯奶牛第一次分娩时的年龄,平价,繁殖季节性和小牛养殖表现之间的关联
Birutė Šlyžienė1, Indrė Mečionytė1, Vytuolis Žilaitis2
1Department of Animal Breeding, Faculty of Animal Science, Lithuanian University of Health Sciences, Tilžes Str. 18, LT-47181 Kaunas, Lithuania.
Animals : an open access journal from MDPI
|September 28, 2023
概括
与雌性相比,雄性查罗莱斯小牛在断奶前的生长率高于雌性. 牛犊的体重增加受母亲的分娩年龄和季节的影响,在来自老母的牛犊和出生于春季或秋季的牛犊中观察到最佳表现.
科学领域:
- 动物科学动物科学
- 畜牧业生产 畜牧业生产
- 牛肉牛研究 牛肉牛研究
背景情况:
- 断奶前的生长是肉牛利能力的一个关键因素.
- 了解对小牛生长的影响,如母体年龄和小牛性别,对于优化群体管理至关重要.
- 沙罗莱斯牛是一种著名的肉牛品种,对其生长动态的研究非常重要.
研究的目的:
- 为了研究母乳分娩年龄和小牛的性别对沙罗莱斯牛的断奶前生长率的影响.
- 为了确定出生季节对小牛的体重和随后的生长表现的影响.
- 提供数据驱动的洞察力,以改善东北欧洲农业系统的肉牛生产.
主要方法:
- 在2019年至2022年间出生的130只纯种沙罗莱斯小牛 (76只公牛,54只公牛) 的纵向研究.
- 数据收集包括出生体重,身体重量在各个阶段到365天,以及母亲的分娩史.
- 统计分析以评估小牛的性别,母婴数量和出生季节对生长参数的影响.
主要成果:
- 雄性小牛在断奶前的出生体重显著更高,体重比小牛增加更大.
- 从以前四个或更多次分娩的母婴出生的小牛,体重增加到210天.
- 最佳的小牛体重和生长速度与春季和秋季的出生季节有关,秋季的出生显示出更高的收益.
结论:
- 牛犊的性别是切罗莱斯牛的断奶前生长表现的重要决定因素.
- 孕产妇的平等性 (产卵数量) 对早年小牛的生长有积极的影响.
- 策略性的分娩和授精时间,特别是在春季和秋季,可以提高小牛的生长和整体牛群的生产力.
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