Identity

Lysine is an essential, dibasic amino acid that serves as the biological anchor for skeletal protein deposition, particularly breast muscle actomyosin. It is used as the reference baseline (100%) in the Ideal Protein Concept because it is primarily utilized for protein accretion with minimal maintenance requirements.

Overview

Lysine is a critical essential amino acid in commercial poultry nutrition. As a core component of balanced feeding phases across both broilers and layers, it is directly responsible for driving skeletal and muscle growth, as well as optimizing egg size. Under IS 1374:2024, its formulation concentration is analytically verified using acid hydrolysis and an Amino Acid Analyzer (AAA) or High-Performance Liquid Chromatography (HPLC).

Structured Facts

Classification

Amino Acid > Essential; Crystalline Amino Acids.

Biological Functions

Drives skeletal protein deposition (breast muscle actomyosin), increases egg size, and serves as the reference baseline for the Ideal Protein Concept.

Nutritional Requirements

Must be formulated as a direct percentage ratio to digestible lysine, functioning as the 100% baseline for all other essential amino acids.

Deficiency

• Clinical Signs: Stunted growth and poor muscle accretion.
• Economic Impact: Reduced breast meat yield and poor egg size.

Toxicity

Interactions

Lysine has a strong metabolic relationship with arginine. High levels of dietary crystalline lysine can trigger an antagonism, competing with arginine for renal reabsorption pathways, which can induce an arginine deficiency and decrease growth performance.

Feed Phase Requirements

• Pre-Starter: Minimum 1.0%
• Starter: Minimum 1.0% (Broiler Starter) / 0.70% (Layer Chick)
• Grower: Minimum 0.70% (Broiler Grower, Layer Grower)
• Finisher: Minimum 0.70% (Broiler Finisher)
• Layer: Minimum 0.70% (Layer Phase I and II)

Quantitative Data

• Requirement: Yes, mandatory across all feeding phases.
• Minimum Level: Varies by phase (e.g., 1.0% in broiler early phases, 0.70% in later phases).
• Unit: Percentage (%) by mass (dry matter basis).

Relationships

• Related Nutrients: Arginine, Methionine, Threonine.
• Feed Additives: L-Lysine HCl.
• Breeds: Broilers, Layers, Parent Stock.
• Production Stages: All stages.
• Calculators: Ideal Protein Concept formulations.