Effects of dietary fiber on performance and egg quality of laying hens at pre-laying and laying peak

Q3 Agricultural and Biological Sciences
P. D. Andrade, Marco Antonio de Freitas Mendonça, F. Cruz, João Paulo Ferreira Rufino, Fernanda Moura Fernandes Silva, Lucas de Almeida Reis
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Abstract

This study aimed to evaluate the effects of different levels of dietary fiber on the performance and egg quality of laying hens at pre-laying and laying peak periods. The experimental period was divided into three periods: pre-laying (16 to 19 weeks of age), the start of laying (20 to 22 weeks of age) and laying peak (23 to 28 weeks of age). The experimental design was completely randomized with treatments constituted by five levels of fiber (2.00, 2.50, 3.00, 3.50, and 4.00%) in the diets, with five replicates (pens) of six birds each, totalling 180 hens. Performance and egg quality results were evaluated by polynomial regression at 5%. Fiber levels were not influenced (p >0.05) the first laying of the hens. However, levels above 2.50% of fiber provided worst (p <0.05) performance results, regardless of the period evaluated. Shortly after the start of laying, higher levels of fiber also caused a linear reduction (p <0.05) on egg weight and percentages of yolk and albumen, and an increase (p <0.05) on eggshells. Higher fiber levels caused a linear reduction (p <0.05) in the quality of the eggs, regardless of the period evaluated. It was concluded that the fiber levels did not influence the start period of the laying. Both pre-laying and start of the laying, levels above 2.5% of fiber caused a gradual worsening in performance. From the start of laying up to laying peak, levels above 2.5% of fiber also caused a gradual worsening in egg quality.
饲粮纤维对产蛋前期和产蛋高峰期蛋鸡生产性能和蛋品质的影响
本试验旨在评价不同水平饲粮纤维对产蛋前期和产蛋高峰期蛋鸡生产性能和蛋品质的影响。试验期分为3个阶段:产蛋前期(16 ~ 19周龄)、产蛋初期(20 ~ 22周龄)和产蛋高峰期(23 ~ 28周龄)。试验设计采用完全随机化设计,按饲粮中纤维水平(2.00、2.50、3.00、3.50和4.00%)5个水平进行处理,5个重复(栏),每个重复6只鸡,共180只鸡。用5%的多项式回归评价生产性能和蛋品质。首次产蛋对纤维水平无显著影响(p >0.05)。然而,无论评估期如何,高于2.50%的纤维水平表现最差(p <0.05)。产蛋后不久,高纤维水平也使蛋重和蛋黄、蛋白百分比呈线性降低(p <0.05),蛋壳百分比呈线性增加(p <0.05)。高纤维水平导致鸡蛋品质线性降低(p <0.05),与评估期无关。综上所述,纤维含量对敷设起始期没有影响。无论是铺设前还是铺设开始,超过2.5%的纤维含量都会导致性能逐渐恶化。从产蛋开始到产蛋高峰,高于2.5%的纤维含量也会导致鸡蛋品质逐渐恶化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Acta Scientiarum. Animal Sciences
Acta Scientiarum. Animal Sciences Agricultural and Biological Sciences-Food Science
CiteScore
1.60
自引率
0.00%
发文量
45
审稿时长
9 weeks
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