USE OF ORGANIC SELENIUM IN BROILER NUTRITION

U radu je istraživan utjecaj dodatka organskog i anorganskog oblika selena u hranu i različitih količina vitamina E na proizvodne i klaoničke karakteristike brojlera. Pokus je proveden na ukupno 240 pilića podijeljenih u 4 skupine, trajao je 42 dana, podijeljena u tri razdoblja. Brojleri su hranjeni s trima vrstama potpunih smjesa za tov pilića standardnog sirovinskog i kemijskog sastava. Potpuna smjesa za početni tov pilića korištena je od 1 do 21. dana, a potpune smjese za završni tov od 21 do 35., odnosno 35 do 42. dana pokusa. Kontrolna skupina (K) brojlera hranjena je smjesama uz dodatak anorganskog selena (natrij selenitom) u količini od 0.3 ppm + 20 IJ vitamina E, a pokusne skupine pilića redom (P-I, PII, P-III), hranjene su uz dodatak organskog selena (Sel-Plex®) +20 IJ vitamina E, anorganskog selena (natrij selenita) +100 IJ vitamina E ili organskog selena (Sel-Plex®) +100 IJ vitamina E. Korištenjem različitih izvora selena (organski selen- selenizirani kvasac i anorganski selen- natrij selenit) i povećane količine vitamina E u hrani nisu značajno utjecale na koncentraciju selena u krvnoj plazmi brojlera. Koncentracija selena u tkivima (meso prsa i jetra) brojlera bila je značajno veća kod brojlera hranjenih organskim selenom (selenizirani kvasac) i povećanom količinom vitamina E, u odnosu na ostale skupine. Kontrolna skupina brojlera, hranjena smjesom uz dodatak anorganskog selena i 20 IJ vitamina E, postigla je proizvodne rezultate uobičajene za provenijenciju, dužinu tova i uvjete držanja, a primjenom organskog oblika selena s većom količinom vitamina E (100 IJ) postigli su se veći prirasti, uz bolju konverziju hrane. Prosječne mase trupova brojlera kretale su se od 1243.32±166.23 (K) do 1470.37±120.00 (P-III). Najniži prinos mesa utvrđen je u kontrolne skupine (65.31%), a najviši u trećoj pokusnoj skupini (69.24 %). Dodavanje organskog oblika selena i povećane količine vitamina E u smjesama brojlera pruža mogućnosti postizanja boljih proizvodnih rezultata, kao i prinosa mesa brojlera.In this paper effects of broiler meal supplementation with organic and inorganic selenium as well as with different amounts of vitamin E on productive results and meat quality were investigated. Experiment was made on the total number of 240 broilers, which were divided into 4 groups. Experiment lasted 42 days and was divided into three parts. Broilers were fed three types of complete mixtures for fattening; these mixtures were of standard feedstock (and chemical composition). Complete mixture for initial feeding was used from 1st to 21st day of life (experiment) and complete mixtures for final growth were used form 21st to 35th day and 35th to 42nd day of treatment. During experiment, control group (K) of broilers was fed mixtures with inorganic selenium (sodium selenite) added in the amount of 30 ppm + 20 IU vitamin E, feed of experimental groups was supplemented with Sel-Plex + 20 IU vitamin E, sodium selenite + 100 IU vitamin E, and Sel-Plex + 100 IU vitamin E (P-I, P-II and P-III ) respectively. Both forms of selenium used (organic and inorganic) and increased amounts of vitamin E did not affect blood selenium concentration significantly.Concentration of selenium and vitamin E in breast meat and liver was significantly higher in groups fed mixtures with added organic bounder selenium and 100 IU vitamin E. Control group of broilers fed mixture with added inorganic selenium plus 20 IU vitamin E achieved usual production results for their proveniance and with the use of organic form of selenium supplemented with 100 IU vitamin E a positive effect reflected in higher body weight gain and better feed conversion were achieved. Average mass of broiler carcasses went from 1243.32±166.23 (control group) up to 1470.37±120.00 (experimental III group). Lowest meat yield was determined in control group (65.31%), and highest in experimental III group (69.24 %). Supplementation of broiler feed mixtures with organic bounded selenium plus vitamin E gives possibility for achievement of better productive results as well as bigger meat yield