对于肉,石灰岩中的铁和二酸的食贡献
J C Feijo1, S L Vieira1, D D B Maria1
1Department of Animal Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, 91540-000 Brazil.
Poultry science
|March 5, 2024
概括
在 brojiler料中补充铁是常见的,但石灰岩和二酸的贡献往往被忽视. 这项研究发现,用足够铁的玉米-大豆饮食养的肉不需要额外补充铁.
科学领域:
- 动物科学动物科学
- 禽类的营养 养
- 微量矿物质的新陈代谢
背景情况:
- 常规补充铁是肉料的标准做法,以防止缺陷.
- 从常见的料成分,如石灰岩和二酸中获得的铁对 brojler 养的贡献仍未得到充分研究.
研究的目的:
- 评估从石灰岩和二酸中获得的铁对肉的活体表现和血液参数的影响.
- 为了确定肉饮食中的这些替代来源的铁的生物可用性和保留率.
主要方法:
- 在一项为期28天的研究中,使用了576只雄性Cobb x Cobb 500肉,对6种饮食治疗进行了分级的石灰岩铁和二酸铁水平.
- 用玉米和大豆粉制定饮食,碳酸和酸被富含铁的来源所取代.
- 评估了活体表现 (体重增加,食摄入量) 和血液参数 (血红素,血红蛋白),以及皮质消化能力,铁的保留,血清费里和肝脏铁度.
主要成果:
- 饮食中的铁含量并没有显著影响肉的活体表现,血红素或血红蛋白在28日.
- 从石灰岩和二酸中增加铁的水平线性地降低了内可消化的铁.
- 相反,铁的保留,血清费里和肝脏铁度显示与这些来源的补充铁线性增加.
结论:
- 来自石灰岩和二酸的铁被肉部分利用,估计有1.9%的保留.
- 养标准玉米-大豆饮食中含有58.2毫克/公斤铁的肉不需要额外补充铁.
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