Crude Fibre & Fibre Fractions

Fibre is a species-dependent value, not a defect

For broilers and young pigs, fibre dilutes energy and can depress performance. For ruminants and adult sows, structural fibre supports rumen function and satiety. The same specification is a constraint in one diet and a benefit in another.

Why crude fibre understates reality

The crude fibre method dissolves part of the hemicellulose and lignin, so it recovers only a fraction of true dietary fibre. Where fibre drives the formulation decision, specify NDF and ADF instead of, or in addition to, crude fibre.

一般的な参考値

Dehulled soybean meal	3–4% CF	Hulls removed
Standard soybean meal	6–7% CF
Sunflower meal	12–24% CF	Dehulling degree dominates
Wheat bran	10–12% CF	High NDF, used for structure

Indicative industry reference values for orientation only — always contract against the delivered lot.

確認すべき事項

—Which fibre method the certificate reports
—Dehulling degree for oilseed meals
—NDF/ADF where the diet is ruminant or high-fibre monogastric

主なリスク

—Energy dilution beyond the formulation assumption
—Pellet quality and throughput changes
—Inconsistent hull inclusion between shipments

よくある誤り

—Treating crude fibre and NDF as interchangeable
—Setting a single fibre maximum across species with different requirements

よくある質問

Should I specify crude fibre or NDF?

Specify crude fibre for a simple commercial guardrail and NDF/ADF when fibre is nutritionally decisive — ruminant diets, high-fibre sow diets, or any formulation where structure is being purchased deliberately.