ANALISIS DE LOS CAMBIOS OCURRIDOS EN ENSILAJES DE KING GRASS A NIVEL DE LABORATORIO Y DE SILOS PILOTOS

Abstract

An experiment was conducted in order to know the effect of the silage type used upon conservation. A silage was made with a sward of king grass fertilized with 60 kg of N/ha/cut and 10 weeks of regrowth in laboratory silos (200 g) and pilot silos (80 kg). Lactic acid microorganisms concentration, enteric bacteria, mould and yeast at 5, 10, 30, 60 and 90 days of conservation were determined. DM, pH, AGVI and ammonia content were measured. Laboratory silages resulted to be significative superior (P<0,05) than those made in pilot silos in pH, butyric acid, acetic acid and ammonia. However, both silages resulted to be stable with a pH higher than 4,0 which corresponded with the initial DM content. Lactic acid bacteria dominated the .fermentation process which corresponded with a higher lactic acid concentration. Both silages may be used for investigation taking into consideration in all cases the existing problems when the silage making conditions are less controlled and the capacity of silos are increased.