在自动化奶系统中,早期哺乳期的奶频率对牛的表现的影响
Erin M Kammann1, Elizabeth A French2, Natalie S Jozik3
1Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI 53706, USA.
Animals : an open access journal from MDPI
|August 29, 2024
概括
在自动化奶系统 (AMS) 中增加早期哺乳期的奶频率可以提高多胎母牛的奶产量和脂肪含量. 在早期哺乳期,更高的母乳养频率 (6X) 可能会增强营养分离,以增加晚期哺乳期的产量.
科学领域:
- 动物科学动物科学
- 乳制品生产 乳制品生产
- 类动物营养 类动物营养
背景情况:
- 自动挤奶系统 (AMS) 越来越多地用于奶牛管理,能够根据哺乳阶段,年龄和生产力进行个性化护理.
- 了解乳频率在早期哺乳期的影响对于优化乳牛在AMS环境中的表现至关重要.
研究的目的:
- 为了研究与标准频率 (每天三次,三次) 相比,早期哺乳期增加的母乳奶频率 (每天六次,六倍) 对使用AMS管理的奶牛的影响.
- 评估早期哺乳期奶频率对牛奶产量,成分和代谢状况的转移效应,在牛奶中长达90天 (DIM).
主要方法:
- 在实验阶段 (4-29 DIM),多夫妇的荷尔斯坦牛被分配到每天3X或6X的挤奶频率 (MPD).
- 牛奶产量,体重和颗粒摄入量被AMS记录下来. 每周分析牛奶成分和脂肪酸概况.
- 血分析物被量化为3,8和13 DIM,以评估代谢状态.
主要成果:
- 6X组中的奶牛在实验阶段获得了更大的MPD. 在实验阶段,每日牛奶产量在各组之间是相似的.
- 在 carry-over 阶段 (30-90 DIM),6X 奶牛在第三次或更长的哺乳期 (3+ LG) 呈现出较高的奶产,相比 3X 奶牛.
- 在实验阶段,在6X,3+LG奶牛中观察到较高的牛奶脂肪含量和4%的脂肪校正牛奶产量. 代谢分析表明,6X,3+LG奶牛的脂肪组织动员增加.
结论:
- 在AMS中增加早期哺乳期奶频率 (6X) 可以提高奶产和脂肪含量,特别是在多母牛 (3+LG) 中.
- 早期哺乳期的挤奶频率会影响营养分离,可能会将其转移到老奶牛在随后的哺乳期阶段的更大产量.
- AMS技术允许精确操纵奶频率,以优化奶牛管理和生产.
更多相关视频
相关概念视频
Load-frequency control
138
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
138
Open and closed-loop control systems
685
Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
685


