研究笔记:P可消化性值的添加性以前使用4种饮食中的Ca水平来确定,用于肉种植者饮食中的植物性料
1Department of Poultry Science, University of Arkansas at Fayetteville, AR 72701, USA.
Poultry science
|February 6, 2025
概括
(P) 在料中的标准化乳液消化率 (SID) 取决于饮食中的 (Ca) 含量. 使用与实践饮食相似的Ca水平对于准确评估 brojlers的P消化能力至关重要.
科学领域:
- 动物营养 动物营养
- 禽畜科学 禽畜科学 禽畜科学
- 消化能力研究 消化能力研究
背景情况:
- 准确确定 (P) 在料中的可消化性对于优化 brojler 养和减少环境P排泄至关重要.
- 以前的研究使用各种 (Ca) 水平确定了P消化能力,但实际饮食中的添加性需要进一步评估.
研究的目的:
- 为了评估在营养充足的肉养殖者饮食中,在单个料中P的标准化乳腺消化性 (SID) 的添加性.
- 评估不同饮食中的Ca含量对P消化度测量的影响.
主要方法:
- 在玉米,大豆粉,大麻粉,玉米发酵蛋白 (CFP) 和小麦中间体中使用肉 (18-21d-of-age) 确定了P的标准化乳腺消化能力 (SID).
- 测试饮食包括基础玉米-大豆食饮食和逐步添加成分的饮食,含有不同的Ca和非酸盐P水平.
- 使用不同度 (0.30%至0.75%) 的先前确定的值计算P的SID,并与完整饮食中测量的值进行比较.
主要成果:
- 基本饮食中P的SID (0.84%Ca,0.12%非酸盐P) 为33%,明显低于其他治疗方法.
- 当使用从0.75%Ca的成分中先前确定的SID的P值时,在完整的饮食中计算的消化能力在测量值的1-3个百分点内.
- 相反,使用0.30%Ca确定的成分SID值,在完整的饮食中高估了13-25个百分点的P的测量SID.
结论:
- 饮食中的Ca水平显著影响肉的料中P的测量SID.
- 准确评估个体料中的P可消化性,需要使用具有Ca含量代表实际 brojler种植者饮食的测试饮食.
- 这凸显了在制定饮食时考虑Ca水平的重要性,以确保最佳的P利用并最大限度地减少P排泄.
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