兔饲料配方设计原理：能量蛋白平衡与氨基酸模型

Scientifically formulated complete feed is the material foundation for realizing the genetic potential of meat rabbits. Feed formulation must follow principles of comprehensive nutrition, energy-protein balance, amino acid complementarity, and economic practicality.

Energy and protein requirements differ significantly across growth stages. Growing rabbits (weaning to 2.5 kg) require digestible energy of 10.5-11 MJ/kg and crude protein of 16-18%. Late finishing can increase DE to 11-11.5 MJ/kg with CP reduced to 15-16%. Breeding rabbit maintenance requires DE 9.5-10 MJ/kg and CP 14-15%.

The energy-to-protein ratio is the core parameter in formula design. Growing rabbits benefit from a DE:CP ratio of 60-65:1. Too high a ratio leads to excessive fat deposition; too low wastes protein and increases ammonia emissions. Using net energy systems yields more precise formulations.

In the amino acid balance model, lysine is the first limiting amino acid, with total lysine requirement of 0.75-0.85% for growing rabbits. Sulfur amino acids (methionine + cystine) require 0.6-0.65%, threonine 0.55-0.6%. Using digestible amino acid systems instead of total amino acid can reduce CP by 2-3 percentage points.

Conventional feed ingredient combinations: corn 25-35% for energy, soybean meal 15-20% for protein, wheat bran 15-25% for fiber, alfalfa meal 20-30% for fiber and vitamins. Premix at 1% ensures adequate trace element and vitamin supply.