“Composición nutritiva y rendimiento de la Caña de Azúcar a 90 y 120 días y King Grass Morado a 60 y 75 días, en condiciones tropicales con sistema de riego por aspersión”.

Abstract

The research was carried out in the premises of the Technical University of Manabí, Parroquia Lodana del Cantón Santa Ana, located in the Department of Animal Production; with the objective of determining the nutritive composition and dry matter yield of sugar cane (Saccharum officinarum) at 90 and 120 days and purple King Grass (Pennisetum purpureum) at 60 and 75 days with sprinkler irrigation system. Two parcels of 20 × 50 m were used for the forage sugar cane and for the King Grass Morado grass, two cutting stages, initial and final, were evaluated; for the King Grass at 60 and 75 days and for the Sugar Cane at 90 and 120 days, the sample was taken by the parallel method using a frame of 0.25 m2 and for the nutritional composition in both stages evaluated crude protein, ash, dry matter, neutral detergent fiber and acid detergent fiber; for the yield a statistical analysis was used and for the nutritional composition a completely randomized design was used. In the bromatological evaluation of King Grass Morado, 60% DM yield was obtained 22% and 75% 23%; and of sugarcane at 90 days 28% and at 120 days 29.5%; MS yields were obtained at King Grass t / ms / ha at 60 days 7.8 t / ms / ha at 75 days 19.62 t / ms / ha; and regarding the yield of DM in sugarcane 90 days were 14.26% t / ms / ha and 120 days 19.99% t / ms / ha; and as for the parameters at 60 days of crude protein (15.69%), ashes (15.85%), NDF (58.12%), FDA (26%). Results of the King Gras Purple to 75 days in dry base of crude protein (9.34%), ashes (16.12%), NDF (65.11%), FDA (29%); for sugar cane at 90 days on dry basis such as crude protein (8.01%), ash (7.53%), NDF (71.15%), FDA (23%). And for sugarcane to 120 days on a dry basis such as protein (7.08%), ash (8.18%), NDF (76.32%), FDA (24%). Therefore, it is recommended to cut the sugar cane at an age of 90 days and purple king grass grass, respectively, at an age of 60 days. Key words: Nutritional composition, Yield, Irrigation system.