使用日常或跳过一天的养殖计划养的 brojiler 养殖者之间的身体组成,胃肠道和生殖差异
L P Avila1, K M Sweeney1, C R Evans1
1Department of Poultry Science, University of Georgia, Athens, GA 30602, USA.
Poultry science
|July 9, 2023
概括
与跳过一天 (SAD) 方案相比,每天 (ED) 养改善了 brojler breeder 子的生长,骨密度和肠道健康. 养ED还提高了蛋的质量和化能力,这表明它对现代育种者来说是优越的.
科学领域:
- 禽畜科学 禽畜科学 禽畜科学
- 动物营养 动物营养
- 生殖生物学 生殖生物学
背景情况:
- 肉养殖者限制料对于管理生长和提高料效率至关重要.
- 跳过一天 (SAD) 养方案一直用于育种者生长控制,但它们对现代育种者的有效性仍在争论中.
- 了解不同养策略对幼发育和随后的繁殖表现的影响至关重要.
研究的目的:
- 为了比较日常 (ED) 和跳过一天 (SAD) 养计划对 brojler breeder 子生长,身体组成,胃肠道发育和生殖性能的影响.
- 评估这些食方案对骨密度和肠道形态学的影响.
- 确定养策略对蛋质量和化能力的影响.
主要方法:
- 罗斯708只小被分配到ED或SAD养计划中,直到21周大.
- 饮食是同营养的,ED饮食含有更高的原料纤维.
- 评估了体重,身体组成 (使用DEXA),骨密度和肠道形态 (杯状细胞).
- 生殖性能和化场指标被记录到60周的年龄.
主要成果:
- 从第10周到第45周,ED鸟类的营养摄入量较重,营养摄入量相似.
- 在不同的时间点上,SAD小狗表现出下体脂肪和骨密度.
- 在4周大的时候,SAD小已经减少了肠道皮杯细胞.
- 来自ED的蛋呈现出更高的比重和受育率的化趋势.
结论:
- 每天养改善了19周的肠道杯细胞,骨密度和身体脂肪.
- 经过ED计划,料转换得到了改善 (2.6%的料减少).
- ED养对蛋质量和卵的肥沃百分比产生了积极的影响,这表明它对现代肉养殖者的优势.
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