NUTRITIONAL COMPOSITION OF CUBA OM-22 HYBRID GRASS (Pennisetum purpureum Schumach x Pennisetum glaucum L.) AT THREE CUTTING AGES

Abstract

   At  INIAP's Central Experimental Station of the Ecuadorian Amazon, the nutritional composition of the forage  Pennisetum  purpureum Schumach x Pennisetum glaucum L was evaluated.  (Cuba OM-22) at different cut-off ages (30, 45 and 60 days).  It was availableo 12 plots of 6m2 each of approximately six months of establishment, was used a diseño de bloques comtamente al  a zar (DBCA) with three treatments and four repetitions, the variables were subjected to a    analysis of variance, the means were evaluated with Tukey's test at 0.05%, in addition a regression and correlation analysis was performed.  Allthe variables studied except dry matter  and acid detergent lignin presented significant and highly significant differences;  at 30  days of cut-off, the highest nutritional values were found, ash (19.04%), ethereal extract (2.84%), protein (14.20%), FDA (34.67%) and FDN (56.29%).  It is concluded that in the forage Cuba OM-22, at 30 days of cutting age presents  the  highest nutritional values, however, it is considered necessary an adequate management of the crop to guarantee the agronomic development and the persistence of the crop.