New feed additives based on phytogenics and acidifiers in animal nutrition

Abstract

Low regulations for feed additives use, has been changed in EU as well as in our country, especially in use of antibiotics as growth promotors. Along years it has investigated an alternative for antibiotics as growth promotors. Essential oilsand organic acids are one of alternative feed, which acting in a few of the most important directions: as antioxidants, metabolic upgraders, growth promotors and development of pathogenic microorganizms controllers, including moulds and bacterias and as environmental protecting through control of amonia and nitrogen excretion. The objective of this paper was to determine the composition of essential oils in a commercial product which, in combination with the blend of organic acids may be used in poultry nutrition as an alternative to antibiotic growth promoters and establish impacts on performance parameters in broilers and microbiological properties of feces. Obtained results showed that the product contained an essential oil in which over 75% of total mass account for 2-phenol-carvacrol and eugenol. Tested product has been found to have positive effects in reduced mortality (from 4,45% to 1,5%), higher body weight by 5,55% and decreased feed conversion by 9.9%. Significant positive effect has been shown in reduction of abdominal fat content, by 70%, and it can be concluded that product in question may be successfully used in poultry nutrition.Zakonska regulativa u oblasti dodataka hrani za zivotinje u zemljama EU a i kod nas se zadnjih godina znacajno promenila, narocito kod upotrebe antibiotika kao promotora rasta. Dugi niz godina radjena su opsezna istrazivanja u pronalsku alternative antibioticima, promotorima rasta. Etericna ulja su jedna od alternativnih hraniva koja deluju u nekoliko najvaznijih pravaca: kao antioksidanti, poboljsivaci metabolizma, kontrolori rasta i razvoja patogenih mikroorganizama, ukljucujuci dejstvo na plesni i bakterije, u zastiti zivotne sredine kroz kontrolu kolicine amonijaka i izlucenog azota U ovom radu ispitivan je sastav etericnih ulja u komercijalnom preparatu koji se u kombinaciji sa smesom organskih kiselina moze primenjivati u ishrani brojlera kao alternativa promotorima rasta i utvrdjivanje uticaja na proizvodnje performanse brojlera kao i na mikrobiolosku sliku fecesa. Rezultati ispitivanja su ukazali da ispitivani preparat sadrzi etarsko ulje u kome preko 75% ukupne mase cine dva fenola karvakrol i eugenol. Ispitivani preparat je imao pozitivno dejstvo na smanjenje mortaliteta (sa 4,45% na 1,5%) , na povecanje tezine za 5,55%, smanjenje feed conversion za 9,8%. Narocito izrazen pozitivan efekat je na smanjenje udela abdominalne masnoce, za 70%.i sa sigurnoscu se moze preporuciti za primenu u ishrani zivine.