Évaluation chez le Poney de la digestibilité du maïs-fourrage déshydraté, des pulpes sèches de betterave, de la luzerne déshydratée, du son de blé, de la paille de blé et des pulpes de raisins

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Abstract
Ponies (6) were fed alternately with dried maize, dried sugar beet pulp, dried lucerne, wheat bran, wheat straw or grape pulp in pellet form for total digestibility trials. They were placed in metabolism crates and received 2 or 3 kg feed/animal per day in 2 meals. The cell wall constituents (carbohydrates) were determined by the methods of Weende, Scharrer and Van Soest. There was a very good correlation between Van Soest cellulose and Scharrer cellulose. The lignin content (Van Soest method) accounted for the digestibility variation between the different feeds. Lignin was a good natural marker for the digestibility measures. The nutritive value of dried sugar beet pulps, dried maize forage, dried lucerne and wheat bran was higher than that of wheat straw and grape pulp, the apparent digestibility of which was unsatisfactory.