Article

Composición nutricional y características fermentativas del ensilaje de maní forrajero

Agronomía Costarricense 01/2006;
Source: DOAJ

ABSTRACT Mediante la técnica de microsilos, se determinó el efecto de la edad de rebrote (8 y 12 semanas), de la deshidratación parcial (con oreo y sin este) y de la adición de melaza (0, 3, y 6%) sobre las características fermentativas y el valor nutritivo del ensilaje de maní forrajero de 2 ecotipos (CIAT 17434 Y CIAT 18744). Se ensiló 1 kg de material en cada bolsa, para un total de 24 tratamientos, con 5 repeticiones. El proceso de ensilado se prolongó por 45 días. Los valores de materia seca fueron afectados significativamente por la frecuencia de corta, el oreo y la adición de melaza, no así por el ecotipo ensilado (p=0,08). En cambio, el ecotipo y la frecuencia de corta afectaron el contenido de proteína cruda (p<0,0001). Los contenidos de fibra detergente neutro y fibra detergente ácida fueron afectados significativamente por los 4 efectos principales. El valor de pH, al igual que la concentración de ácidos acético, butírico y láctico, variaron significativamente en respuesta a la adición de melaza y el oreo, no así por la edad de rebrote y el ecotipo ensilado; en cambio, la capacidad buffer fue alterada por los efectos principales (p<0,0001). El contenido de nitrógeno amoniacal varió por efecto del contenido de melaza, edad de rebrote y ecotipo ensilado, no así por el oreo (p<0,621). El tratamiento que obtuvo los mejores parámetros de calidad nutricional y fermentativos fue el ensilaje del ecotipo 17434, con una edad de rebrote de 8 semanas, sin oreo, y con la aplicación de 6% de melaza.

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