增长表现和微生物活动对和的交互作用对年轻的荷尔斯坦乳牛犊的成长表现和微生物活动产生了积极的反应
Vahid Mahmoudi1, Mehdi Kazemi-Bonchenari1, Mehdi Hossein Yazdi1
1Department of Animal Science, Faculty of Agriculture and Natural Resources, Arak University, Arak, Iran.
Journal of animal physiology and animal nutrition
|November 5, 2024
概括
牛犊初始饮食中蛋白质和的含量较高,改善了生长和微生物蛋白质合成. 24%的原始蛋白质和0.7%的的组合在年轻小牛中产生了最好的结果.
科学领域:
- 动物营养 动物营养
- 动物生理学 动物生理学
- 牛犊的成长和发展.
背景情况:
- (N) 和 (P) 是动物生长的关键营养素.
- 对于N和P对年轻小牛的相互作用影响还没有完全理解.
- 优化营养水平对于高效的小牛养殖至关重要.
研究的目的:
- 研究饮食原蛋白 (CP) 和 (P) 水平对年轻的霍尔斯坦小牛的个体和相互作用影响.
- 评估这些营养素对生长性能,健康,营养素消化能力和微生物蛋白质合成 (MPS) 的影响.
主要方法:
- 48只雌性荷尔斯坦小牛被食四种初始饮食之一,其中原蛋白 (20%对24%) 和 (0.35%对0.70%) 不同.
- 生长表现,初始摄入量,健康指标,营养消化能力和微生物蛋白质合成 (通过纯素衍生物估计) 被监测到73天的年龄.
- 小牛在59天的年龄后被奶.
主要成果:
- 较高的原始蛋白质 (24% CP) 改善了初始摄入量,在断奶前期间的平均每日增益 (ADG) 和最终体重.
- 增加补充剂 (0.7% P) 增强了断奶前的ADG和微生物蛋白质合成 (MPS).
- 24% CP和0.7% P的组合导致了最大的初始摄入量,改善了整体外观,增加了身体身高测量,提高了营养消化能力和最大的MPS.
结论:
- 和对小牛的生长性能有不同的影响.
- 较高的食N和P之间的协同作用对生长性能和微生物发育产生积极影响,特别是在关键的断奶前阶段.
- 有足够的CP和P的优化起始配方对于最大限度地提高小牛的生长和肠道健康至关重要.
相关概念视频
01:29Factors Influencing Microbial Growth: pH
1
Microorganisms are classified as acidophiles, neutrophiles, or alkaliphiles based on their pH growth preferences, reflecting their adaptations to specific environments. Maintaining a stable intracellular pH is critical for macromolecular stability and enzymatic activity, which can be challenged by external pH variations.Neutrophiles, such as Escherichia coli, grow optimally between pH 5.5 and 8.0. These microorganisms inhabit neutral or slightly acidic environments and employ mechanisms like...
1
01:27Microbial Growth Measurement: Indirect Methods
1
Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
1
01:23Microbial Growth Measurement: Direct Methods
1
Direct methods for measuring microbial populations in a culture are essential tools in microbiology, providing quantitative data for various applications. Among these, microscopic counts, plate counts, and serial dilution are widely used techniques, each with unique principles and applications.Microscopic CountsMicroscopic counting involves the use of a Petroff-Hausser chamber, a specialized microscope slide with a grid and defined depth. By observing a liquid culture under a microscope,...
1
02:35Key Elements for Plant Nutrition
18.7K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.7K