Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

1 st WorkshopXIII International Feed Technology SymposiumTHE QUALITY OF SILAGES FROM LUCERNE, WHOLE MAIZEPLANT AND MAIZE COBS PREPARED WITH VARIOUSADDITIVESNenad Đorđević 1 , Goran Grubić 1 , Jovanka Lević 2 , Slavica Sredanović 2 , BojanStojanović 1 , Aleksa Božičković 11 Faculty of agriculture, Nemanjina 6, 11080 Zemun, Serbia2 Institute for food technology, Bulevar cara Lazara 1, 21000 Novi Sad, SerbiaABSTRACTThe aim of this experiment was to investigate effects of various additives on chemicalcomposition and biochemical parameters of quality in silages prepared from lucerne,whole maize plant and maize cob. Additives used when lucerne was ensiled were: maizemeal (50 g/kg) and homofermentative inoculant. Whole maize plant was ensiled withadded urea (5 g/kg) and organozeolite (2 g/kg). Maize cobs were ensiled with addedhomofermentative inoculant and organozeolite (2 g/kg). Based on the obtained results itis found that the carbohydrate and biological additives had the highest influence forlucerne silage. Addition of urea significantly increased crude protein content in maizeplant silages, but had no influence on the process of fermentation and silage quality.Addition of organozeolite decreased the degree of proteolysis in maize cob silages.Key words: additives, silage, lucerne, maizeINTRODUCTIONAt the beginning of the 21-st century ensiling technology received a new dimension ofimportance due to the widespread use of conserved feeds, especially silage, during thewhole year, with the aim of achieving the maximally stabilized milk production [19].The development of ensiling technology begins in the first half of 19-th century, andbecame much more developed during second half of 20-th century. The main factor thatwas limiting the distribution of this technology was lack of adequate mechanization andappropriate siloses, but also inadequate knowledge of basic principles of ensiling [15].During the development of the ensiling technology there were many experiments whoseresults were successfully used in practice (chemical conservant based on organic acids,carbohydrate additives, wilting, biological agents), or completely discarded asinadequate (ensiling with electric current), or impractical (mineral acids). Today thebiological preparations are favored and the main aim of the technology is obtain as goodquality as possible, with the maximal aerobic stability and nutritive value [12, 14]. In ourcountry the organozeolites are investigated as silage additives because they possesability to adsorb mycotoxins, heavy metals and other substances potentially harmful foranimals [9, 16]. The aim of this experiment was to investigate effects of variousadditives on chemical composition and biochemical parameters of quality in silagesprepared from lucerne, whole maize plant and maize cobs.146