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饮食密度对幼生长和早期蛋产量的全度学的影响

Lieske van Eck¹, Adele Schouten², Syrena Powell²

¹Cargill Animal Nutrition Innovation Center, NL-5334 LD Velddriel, the Netherlands; Department of Animal Sciences, Wageningen University, NL-6700 AH Wageningen, the Netherlands.

Poultry science

|November 19, 2023

概括

营养丰富的饮食会影响身体成分,从小就增加脂肪沉积. 观察到这种对身体脂肪的影响没有影响整体生长或随后的卵子生产性能.

科学领域:

动物营养动物营养
禽畜科学禽畜科学禽畜科学
增长生理学的生长生理学

背景情况:

优化子营养对于实现所需的身体组成和长期产卵性能至关重要.
了解养殖阶段营养密度对生长曲线和身体成分的影响,对于制定有效的养策略至关重要.

研究的目的:

为了研究不同营养密度 (可代谢能量和必需氨基酸) 对Hy-Line白色W80幼生长,体质组成和卵子产生的影响,直到35周大.
为了建立身体部件之间的多相全度增长关系,并确定拐点.

主要方法:

幼从化开始被养低,中或高营养密度的食,直到17周大.
分析了体重,身体成分 (原蛋白,原脂) 和腹部脂肪的百分比.
卵生产参数被监测到35周的年龄.
使用混合模型分析和多相全度增长曲线建模.

主要成果:

由于饮食密度增加,在养殖阶段结束时的BW更高,在生产峰值期间保持.
养饮食密度对蛋生产参数没有显著的影响.
身体粗脂肪和腹部脂肪的百分比从幼年开始与饮食密度线性增加.
原始蛋白质沉积主要推动了生长到大约12周,不受饮食密度的影响,而与蛋白质相对的原始脂肪沉积从5-6周开始增加,受饮食密度的影响.

结论:

养殖阶段饮食中的营养密度会影响幼的身体组成,特别是从小就增加脂肪沉积.
虽然身体成分受到影响,但卵子生产性能在不同营养密度下保持一致.
早期的生长是由原始蛋白质沉积驱动的,原始脂肪沉积变得越来越重要,并在养殖期晚些时候受到食密度的影响.

关键词:

所有度测法 (allometry) 是一种全度测法.饮食密度饮食密度饮食密度增长的增长增长的增长增长的增长.一个小小的子.

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