Maize (Zea mays) is one of the main ingredients of feeds that are made in Spain (approximately 4 million Tm/year), and is particularly appreciated for its high energy value, palatability, very slight variability of chemical composition and low content in anti-nutritioinal factors.

Hard wheat (Triticum durum, tetraploide) is the third most used cereal for the manufacture of feeds in Spain (approximately 1.5 million Tm/year). Recently an increase has been noticed in its use for animal feeds.

Hard wheat (Triticum durum, tetraploide) is the third most used cereal for the manufacture of feeds in Spain (approximately 1.5 million Tm/year). Recently an increase has been noticed in its use for animal feeds.

BY-PRODUCTS OF CEREALS
At the successive stages of the process of milling and sifting of wheat to obtain flour, a number of by-products are obtained which, taken together, amount to about 25% in weight of the grain. The world production is estimated at some 500 million Tm per year. Bran is highly palatable and has a high availability on the market. The principal component is fibre (37% FND in bran) which is also the main limiting factor for its inclusion in diets, especially in aviculture.