The effect of different chemical preservative supplementation on the lupin silage quality

The aim of this study was to evaluate the effect of a chemical preservative supplementation on the quality of lupine silage as compared with untreated controls. Fresh green Lupine (Lupines lupine), variete Juno, dry matter content 187.15 g/kg at full waxy stage of maturity were chopped to the legth of cut ca 30-50 mm. The crop was artificially wilted for a periody 24 h and ensiled as described above. Lupine were ensiled for 98 days in laboratory silos, capacity about 4 l alone or with supplementation of chemical preservative 3 and 6 l/tone forage respectively). The relatively mean WSC content and the low buffering capacity of lupine crop provided for a good preservation with the chemical preservative.
The best quality of fermentation process and nutritive value was found in silages with the supplement of acid mixtures dosed at 6 l/t since they showed not only a better content of net energy (NEL) and CP but also a significantly higher ethanol content, a more favourable RDP content and a higher starch content than the control. The supplement of preservatives resulted in the increased DM content in stored silage, in the increased escape of silage effluents and in the inhibited (P < 0.01) formation of acetic acids (19.8±2.17 g/kg DM) in comparison with control silage. In chemical treated silages (3 l/t) was also increased level (P < 0.01) of lactic acid (116.9±2.61 g/kg DM) and total acids in kg of dry matter (143.4±3.64 g/kg), but decreased level of pH value (4.03±0.01), acidity water extract (KVV-1221.1±11.51 mg KOH/100 g silage), titration acidity (FT-0.107±0.002), and of NH₃ content (664.1±7.51 mg/kg DM).

Keywords: lupine silage, quality of silage, lupine, fermentation process, nutritive value

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Příspěvek byl zpracován s podporou Výzkumného záměru č. MSM 6215648905 "Biologické a technologické aspekty udržitelnosti řízených ekosystémů a jejich adaptace na změnu klimatu" uděleného MŠMT ČR