What Is Crude Protein? Why Does It Matter in Feeds?

It is used to express a product’s general status in terms of protein and is an important reference point, especially in feed formulation.

However, the crude protein content alone does not explain a feed’s actual protein quality or the animal’s protein needs. For a correct assessment, the amino acid structure, other nutrients, and the animal species and production period should also be taken into account.

Protein is one of the basic nutrients needed for animals’ growth, the formation and renewal of tissues, the production of enzymes and hormones, and various vital functions.

An animal’s protein needs may vary with its species, age, live weight and production period.

For example, the nutrient needs of a growing animal and an animal in a high-yield period are not the same. So when formulating a feed, simply targeting a fixed protein percentage is not enough.

Proteins are made up of amino acids. Not all the amino acids animals need can be produced in the body in the same way or in sufficient quantities.

For this reason, in assessing a feed, the amount and balance of amino acids are important as well as the total amount of protein.

Especially in feeding poultry and high-yielding animals, assessing protein quality requires a more comprehensive approach than simply looking at the crude protein content.

When preparing a compound feed, different raw materials are combined to reach the targeted nutritional values.

Protein sources are one of the important parts of this formulation. Different raw materials such as soybean meal and sunflower meal have different protein contents and nutritional profiles.

During formulation, not only the protein content of these raw materials but also their energy, fibre, fat, amino acid profile and other characteristics are assessed together.

The aim is not to use the highest possible proportion of a single raw material, but to create a balanced feed suited to the animal’s needs.

The crude protein value of a feed raw material may vary depending on:

• the variety of the product,
• production conditions,
• the harvest period,
• the processing method,
• the proportions of the product’s different parts,
• storage conditions.

For this reason, the analysis results of two different batches sold under the same name are not expected to be exactly the same.

Especially in commercial purchases, taking the product’s actual analysis result into account is important for formulation and quality assessment.

Soybean meal and sunflower meal are among the important protein sources in the feed sector. But these two products differ not only in their protein content, but also in fibre, fat, amino acid structure and other nutritional characteristics.

So when one raw material is used in place of the other, simply matching the crude protein percentage is not enough.

Formulation should take into account all of the product’s nutritional characteristics and the animal’s needs.

In organic feeds, too, crude protein is one of the basic parameters for assessing nutrition.

But in assessing an organic feed, the compliance of the raw materials used with organic production and sourcing conditions is also important alongside the protein content.

A product’s high protein content alone therefore does not mean it is suitable for an organic feed formulation. Its source and compliance with the relevant organic requirements should be assessed together with its nutritional value.

Crude protein is one of the basic analysis values used to assess feeds and feed raw materials. But on its own it does not show a feed’s quality or an animal’s protein needs.

For a correct assessment, the crude protein value should be considered together with other factors such as amino acid profile, energy, fibre, fat, digestibility, animal species and production period.

The goal in feed formulation is therefore not just to reach a high protein content, but to create a balanced nutrient structure suited to the animal’s needs.