EFFECT OF PROBIOTIC ENZYMATIC ADDITIVE WITH GLUCOSE-OXIDASE ON PALATABILITY AND DIGESTIBILITY OF SILAGES WITH LOW CONTENT OF DRY-MATTER

The effects of probiotic-enzymatic additive Bactozym (Medipharm CZ, Lt d., Hustopece u Brna) on palatability and digestibility of ensiled for ages with low dry matter were studied. Forages were ensiled in silage containers (7 m(3) of volume) with probiotic-enzymatic additive and wi thout it. From the point of view of the quality of the fermentation pr ocess, grass silages were better than grass-clover mix and clover sila ges. The probiotic-enzymatic additive in grass and grass-clover mix si lages increased the lactic acid level and decreased the acetic acid le vel and pH. The probiotic-enzymatic additive in clover silages increas ed the content of lactic acid, and also pH. In spite of the increasing quality of the treated silages in comparison with untreated ones, add itive had not such a power to make postulated quality of silages. The digestibility in vitro of organic matter of silages with additive was higher (not significantly, P > 0.05) than of control ones (in grass on es of 2.5%, grass-clover of 3.6% and clover of 0.6%). The digestibilit y in vivo, tested only with the silages without additive, was used for working-out of the nutrition index PDI (Protein Digestible Intake), N EL (Netto Energy of Lactation). The palatability of the silages was si gnificantly (P < 0.05) higher in the silages with the additive than of those without it (in grass of 390, grass-clover of 216 and clover sil ages of 501 g DM/day/heifer with 100 kg of live weight).