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在小反动物中模拟胃肠道湿池大小
Paola R Ribeiro1, Marcelo Gindri2, Gilberto L Macedo Junior3
1Department of Animal Science, São Paulo State University, Jaboticabal 14884900, SP, Brazil.
小反动物的胃肠道湿池大小主要受到饮食成分的影响,而不是体重. 中性洗剂纤维摄入量显著影响消化填充,超过物种差异.
科学领域:
- 动物营养 动物营养
- 消化系统生理学 消化系统生理学
- 动物的新陈代谢
背景情况:
- 胃肠道湿池大小 (GITwps) 是小型反动物的一个关键指标,可能达到体重的19%.
- 准确预测GITwps对于了解绵羊和山羊的消化过程和营养需求至关重要.
研究的目的:
- 开发使用元回归方法在小反动物中GITwps的综合预测模型.
- 确定影响GITwps的关键因素,包括体重,饮食和生理状态.
主要方法:
- 对来自21项对绵羊和山羊的研究中的750个个人记录的数据集进行了元回归分析.
- 预测变量包括BW,性别,物种,摄入水平,怀孕状态以及NDFI等饮食成分.
- 使用监督前期选择和自然对数转换来适应模型,同时考虑研究水平的随机效应.
主要成果:
- 在牛奶养动物中没有发现GITwps和BW之间的显著关系;在固体养动物中存在强烈的负面关系.
- 饮食成分,特别是中性洗剂纤维摄入量 (NDFI),是GITwps的主要调节器,超过了物种效应.
- 孕妇的GITwps降低,在多胎妊娠中效果更为明显;性别通常不是一个重要的预测因素.
结论:
- 饮食因素,特别是NDFI,对于确定小反动物的GITwps至关重要,为营养管理提供了关键的见解.
- 预测模型突出了饮食,生理状态和物种在调节消化道填充中的复杂相互作用.
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