Effect of the stage of maturity on the leaf percentage of lucerne and the effect of additives on silage characteristics
Tyrolova, Y.,Vyzkumny Ustav Zivocisne Vyroby, Prague (Czech Republic) | Vyborna, A.,Vyzkumny Ustav Zivocisne Vyroby, Prague (Czech Republic)
The first part of the study concerned the effect of the stage of maturity on nutrient content and leaf percentage in lucerne. Lucerne plants were harvested and analysed at different growth stages. Crop yield, changes in nutrients' concentrations, leaf percentage in the whole herbage and leaf yield were determined. The leaf percentage at the growth stage of small buds was significantly higher than that at the growth stage of bloom (1st cut: 52.7% vs. 46.62%; 2nd cut: 52.03% vs. 44.70%; 3rd cut: 50.58% vs. 46.26%). Crude protein concentration decreased significantly after the large bud growth stage (small buds: 219.6 g/kg DM, large buds: 203.1 g/kg DM vs. flowering: 173.5 g/kg DM, after flowering: 154.2 g/kg DM). In the second part of the study the effect of silage additives on the fermentation of lucerne was investigated. The bacterial inoculant (containing homo- and heterofermentative lactic acid bacteria), chemical additive (Ch, containing formic acid, propionic acid, ammonium formate and benzoic acid) and the bacterial inoculant with benzoic acid (ICh) were used for the improvement of the fermentation process. The addition of the inoculant with L. buchneri sinificantly increased the acetic acid concentration in dry matter (group with inoculant: 1.22%; group Ch: 0.84%; group ICh: 1.43%, control silage: 1.14%).
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