lstraživano je djelovanje na građu kostiju dikalcij fosfata (određenog proizvođača) i trikalcij fosfata („Komnophos“, Fosfaty, Voskresensk, Ukrajina) kao dodataka hrani u odojaka. Skupine odojaka su tijekom 54 dana, odnosno od prosječne težine 6 kg do 27 kg primale u hrani 1% dikalcij fosfata, (ll. skupina), odnosno 0,5% (lll. skupina), 1% (lV. skupina) i 2% (V. skupina) trikalcij fosfata. Kontrolna skupina (1. skupina) nije primala navedene dodatke, nego je u hrani primala samo 0,37% fosfora biljnog porijekla. Svaka skupina se sastojala od dvije muške i dvije ženske životinje. Utvrđeno je da je s povećanjem koncentracije navedenih dodataka hrani paralelno dolazilo do povećanja čvrstoće i mase kostiju, povećanja količine kalcija i fosfora u kostima, te da je kod istih koncentracija dodavanja dikalcij i trikalcij fosfata, trikalcij fosfat bio neznatno biološki vredniji. Završne težine odojaka (žive vage i klaoničke težine) su također rasle s povećanjem koncentracije istraživanih dodataka, tako da su najveće bile u V. skupine, a najmanje u l. skupine. Ni u jedne istražene skupine nisu utvrđene nikakve patološke promjene na istraženim kostima. Zaključeno je da se istraženi trikalcij fosfat, s gospodarskog gledišta, može koristiti kao izvor kalcija i fosfora u hranidbi svinja, te da ima čak nešto veću biološku vrijednost od dikalcij fosfata. Preporučeno je da se prije njegove široke primjene kao dodatka stočnoj hrani, istraži i njegovo eventualno sporedno djelovanje, djelovanje na reprodukciju, te teratogeno, mutageno i kancerogeno djelovanje.In the present experiment the effects on bone structure of dicalcium phosphate (known producer) and tricalcium phosphate („Kormophos“, Fosfaty, Voskresensk, Ukraine) as a feed additives for piglets was studied. During 54 days, that is during the growth of the average body weight 6 - 27 kg, the piglets were administered by above feed additives. Every groups were consisted of two male and two female experimental piglets. Control group (group l.) did not administrating any feed additive, and received a diet containing only 0.37% phosphorus of vegetable origin. Group ll. received a diet containing 1% tricalcium phosphate. The experimental groups, lll., lV. and V. were fed the diets containing 0,5%, 1% and 2% of tricalcium phosphate. Results showed a parallel increase in mass and vigor of investigated bones, particular of the femur, increase of contents of calcium and phosphorus in bones and the increase administration of above feed additives. Biological value of tricalcium phosphate was a little higher in relation to dicalcium phosphate. The final weights (live weight and slaughter weight) of experimental piglets were increased parallel with increased administration of feed additives, too. The final weight of the piglets of group. V. was the biggest, and the piglets of group l. was the lightest. None of investigated bones show any pathological changes. One can conclude, the investigated tricalcium phosphate can be use as a source of calcium and phosphorus in swine feed, from economical point of view. It is recommended, before its widely use as a feed additive, to study its eventually side effect on reproduction and teratogenic, mutagenic and carcinogenic effects
