Effects of the use of sodium benzoate as the conservant in lucerne ensiling

Abstract

The influence of sodium benzoate as the chemical conservant in three doses (3, 5, 7 g/kg green mass) on the intensity of fermentation and proteolysis in lucerne silage was investigated. On the basis of chemical analysis it is found that with the increase of conservant dose nitrogen solubility was limited. If silages treated the absolute and relative domination of acetic acid was found in total acid content. The increase of bonded acetic acid was discovered with the increase of conservant dose. Free butyric acid was not detected while bonded butyric acid was present in negligible concentration without effect on silage quality. In spite of some foreign references domestic experiences show that sodium benzoate in used doses is not the effective conservant. The obtained results fortifi the need for further investigations in developing correct doses of sodium benzoate to be used in ensiling of lucerne and other materials.

U eksperimentu je ispitivan uticaj natrijum-benzoata, korišćenog u svojstvu hemijskog konzervansa u tri doze (3, 5 i 7 g/kg zelene mase) na intenzitet fermentacije i proteolize u silažama lucerke. Na osnovu rezultata hemijskih analiza utvrđeno je da je upotreba natrijum-bezoata kao konzervansa dovela do smanjenja količine mlečne kiseline u relativnom smislu, do smanjenja rastvorljivosti azotnih materija i povećanja očuvanosti proteina. Prema korišćenim metodama (Flieg-ova i metoda po Dulphy-u i sar., 1981) upotreba konzervansa nije uticala na kvalitet silaža. I pored nekih stranih preporuka, iskustva iz domaćih istraživanja ukazuju da natrijum-benzoat u korišćenim dozama nije efikasan konzervans. Utvrđeni rezultati ukazuju na neophodnost nastavljanja ispitivanja u cilju utvrđivanja optimalne doze natrijum-benzoata pri siliranju lucerke i drugih sirovina.