不同的食氨酸和甘氨酸供应在养低蛋白饮食的 brojlers 的影响
Patrik Strifler1, Boglárka Horváth1, Nikoletta Such1
1Department of Nutrition and Nutritional Physiology, Institute of Physiology and Nutrition, Hungarian University and Agriculture and Life Sciences, Keszthely, Hungary.
Frontiers in veterinary science
|April 9, 2024
概括
减少肉饮食中的原始蛋白质与平衡的氨基酸可以改善的利用,减少氨. 在低蛋白饮食中优化氨酸和甘氨酸+氨酸水平是肉表现的关键,而不会影响生长.
科学领域:
- 动物营养 动物营养
- 禽畜科学 禽畜科学 禽畜科学
- 料配方 料配方 料配方
背景情况:
- 减少肉饮食中的原蛋白 (CP) 会提高 (N) 的利用率,并最大限度地减少氨排放.
- 优化必需的和非必需的氨基酸水平,特别是氨酸 (Thr) 和甘氨酸 (Gly) +氨酸 (Ser),对于低蛋白 (LP) 饮食至关重要.
- 在LP肉饮食中,Thr和Gly+Ser (作为Glycine等价物,Glyequi) 的精确要求和相互作用仍然不完全理解.
研究的目的:
- 研究低粗蛋白饮食对肉的表现和利用的影响.
- 为了确定最佳的标准化乳腺消化 (SID) 氨酸与氨酸的比率和肉饮食中的Glyequi水平.
- 评估不同LP饮食对生长,料转化,尸体特征和气保留的影响.
主要方法:
- 四种饮食治疗方法进行了比较:一个控制 (C) 饮食和三个低蛋白 (LP1-3) 饮食,CP降低了2%.
- 在SID Thr:Lys比率 (C,LP1,LP3: 63%;LP2: 72%) 和Glyequ水平 (C: 15.65 g/kg;LP1: 13.74 g/kg;LP2: 13.70 g/kg;LP3: 15.77 g/kg) 中,饮食有所不同.
- 在种植者 (11-24天) 和完成者 (25-35天) 期间评估了肉的表现,尸体特征和留量.
主要成果:
- 低蛋白饮食没有对肉的整体性能特征产生负面影响.
- 与对照组相比,LP2饮食增加了SID Thr:Lys比率,显著改善了体重增加和料转换比率.
- 含有猪肉和与对照组相似的Glyequi的LP3饮食导致了最佳的终端料转换和最高的气保留,但对尸体重量和腹部脂肪比率产生了负面影响.
结论:
- 优化SID Thr:Lys比率在维持低蛋白饮食中的 brojler性能方面是有效的.
- 特定的低蛋白配方,如LP3,可以提高固和料效率,尽管需要仔细选择成分,以避免对尸体产生负面影响.
- 需要进一步研究低蛋白质肉饮食中的Glyequi要求和相互作用.
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