在密集生产系统下,南非肉牛的断奶后生长表现的用水效率
Ayanda M Ngxumeshe1, Takalani Mpofu1, Khathutshelo Nephawe1
1Department of Animal Sciences, Tshwane University of Technology, Pretoria 0001, South Africa.
Animals : an open access journal from MDPI
|September 13, 2025
概括
中型肉牛为可持续农业提供了增长和水效率的最佳平衡. 小牛表现出优越的水适应性,而大牛消耗更多的水,并有更大的水足迹.
科学领域:
- 动物科学动物科学
- 农业工程 农业工程
- 环境科学 环境科学
背景情况:
- 密集的肉牛生产系统需要高效的资源利用.
- 水利用效率 (WIE) 是可持续畜牧管理的一个关键因素.
- 框架尺寸影响肉牛的生长性能和资源消耗.
研究的目的:
- 在断奶后的成长过程中,确定不同框架大小 (小,中,大) 的肉牛的用水效率 (WIE).
- 评估尺寸对成长绩效指标的影响,例如平均每日增长 (ADG) 和体重增长 (WG).
- 计算和比较每只动物 (WFP/AU) 和每公斤 (WFP/kg) 的水足迹.
主要方法:
- 三十三头肉牛的断奶牛被分配到代谢,并提供料和水.
- 水摄入量 (WI),料摄入量 (FI) 和体重被记录在开始,种植和完成阶段.
- 使用SAS版本9.4进行统计分析,用费舍尔的LSD测试分隔平均值.
主要成果:
- 大型牛的最终重量 (WTf) 和水摄入量 (WI) 显著增加,导致每只动物的水足迹最大 (WFP/AU).
- 中等体型的牛获得了最高的平均日益 (ADG) 和适度的WIE,这表明生产力和用水之间的最佳平衡.
- 小型牛体表现出最佳的水消耗效率 (WCE) 和最低的WFP/AU,这表明它们具有卓越的水利用适应性.
结论:
- 中型肉牛在生长性能和资源效率之间提供了平衡的妥协,适合可持续生产.
- 小型牛更适应用水,而大型牛在用水方面效率较低.
- 优化框架尺寸选择可以提高肉牛生产的可持续性,特别是在水资源有限的环境中.
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