在非怀孕的第一平价母猪中,能源支出和维护要求
Ryan S Samuel1,2, Soenke Moehn2, Ronald O Ball2
1Department of Animal Science, South Dakota State University, Brookings, SD 57006, USA.
Animals : an open access journal from MDPI
|November 27, 2024
概括
确定母猪的能量消耗对于有效养至关重要. 这项研究提出了一个新的维护能源需求 (MEm) 的506 kJ ME/kg^0.75为非孕母猪基于热量生产的测量.
科学领域:
- 动物科学动物科学
- 营养生理学 营养生理学
- 猪的新陈代谢情况
背景情况:
- 精确的能源需求对于优化猪产量和尽量减少浪费至关重要.
- 以前的维持能量的估计 (MEm) 可能不反映现代母猪遗传学的需求.
研究的目的:
- 为了确定不同养方案下的非孕母猪的能量消耗 (EE) 和热量产量 (HP).
- 重新评估并提出对非怀孕的现代母猪的更新维护能源需求 (MEm).
主要方法:
- 五只没有怀孕的母猪被安置在呼吸室中,并被养1.0或2.0倍的估计MEM,每只为一周.
- 测量了能量摄入量和热量产生,养策略包括小,频繁的餐点和单一的大餐.
- 监测了体重变化和呼吸系数 (RQ),以评估能量平衡和基质利用率.
主要成果:
- 养1.0MEm的母猪经历了负能量平衡和体重减轻,而养2.0MEm的母猪在RQ>1时体重增加,表明脂肪沉积.
- 与吸收后的时期相比,在养期间 (小或大餐) 的热量产生明显更高.
- 该研究确定了506 kJ ME/kg^0.75的未怀孕的现代母猪的建议MEM.
结论:
- 食策略和能量摄入水平显著影响母猪的能量消耗和身体成分.
- 拟议的MEm为非怀孕的现代母猪提供了更准确的营养指南.
- 进一步的研究可以在不同的母猪基因型和生理状态上验证这些发现.
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