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Unripe cereals and straw : a security for forage systems

Paru en 1998 dans Fourrages n°156 (page 557 à 572)

Auteurs : Le Gall A.

Co-auteurs : Cabon G., Delattre J.C.

Mots-clefs : étude économique, bovin d'élevage, production laitière, sécurité fourragère, ensilage, valeur alimentaire, stade de récolte, ration de base, céréale immature, traitement des pailles

Résumé :

Since the setting-up of milk quotas, cereal crops have been developing on most dairy farms. They are mostly used as grain and constitute an interesting security as a feed, as they can be ensiled at the milk or wax-ripe stage, if spring or early summer are dry. The yield of cereals is more regular than that of maize in the regions with dry summers. The best stage for harvest is at 30-40% DM ; the digestibility is then close to that of maize silage and can be slightly improved by the incorporation of urea or soda. There have been many studies in France and elsewhere in Europe on the performances of animals fed silage from unripe cereals. Its feeding value for milk production is intermediate between that of grass silage and that of maize silage ; for growing animals the performances are similar. Various diets with silage from unripe cereals are presented. The straw + grain diet is also considered. Fine chopping (1-2 cm), compaction and a good finishing of the silo are essential for a successful cereal silage ; its cost per F.U. (for milk production) is 0.3 – 0.4 F, i.e. similar to that of maize silage and lower than that of grass silage or hay.

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