The aim of this study was to investigate the effects of Na-butyrate and
Yucca schidigera extract treatment on skeletal development of pigs. The study was conducted from the 14th until the 56th day of postnatal life. Piglets were randomly assigned to control group fed on a standard diet supplemented with a coated blend of organic acids (fumaric, malic and citric - 1.5 kg/t feed), and an experimental group fed on a similar diet with the addition of coated Na-butyrate (900g/t feed) and extract of Yucca schidigera (75g/t feed). At age of the 28th, 35th and 56th days of life the piglets were slaughtered and the humera were isolated for further analyses. The bone formation and quality were measured based on weight, length, bone mineral content (BMC), bone mineral density (BMD), physical (ultimate strength, maximum elastic strength) and geometrical parameters.
The bone weight and geometrical parameters such as cross-sectional area, second moment of inertia, mean relative wall thickness were significantly increased in experimental 56 d old piglets. Furthermore, experimental diet induced significantly higher BMC and BMD, and improved the mechanical endurance of bones in terms of the moments of maximum elastic strength and maximum strength. It is concluded that early postnatal treatment of piglets with Na-butyrate and extract of Yucca schidigera positively affects the development and function of the bones during growth.Cilj je rada bio istražiti djelovanje Na-butirata i tretmana s ekstraktom Yucca schidigerae na razvoj kralježnice svinja. Istraživanje je provedeno od 14. do 56. dana poslije rođenja. Praščići su nasumce podijeljeni u kontrolnu skupinu i hranjeni standardnim obrocima s dodatkom dražirane smjese organskih kiselina (fumarične, jabučne i limunske - 1,5 kg/t krmiva) i pokusnu skupinu hranjenu sličnim obrocima s dodatkom dražiranog Nabutirata (900 g/t krmiva) i ekstrakta Yucca schidigera-e (75 g/t krmiva). U dobi od 28, 35 i 56 dana praščići su zaklani te su izolirane nadlaktične kosti (HUMERA) za daljnje analize. Izmjereni su sastav i kakvoća kosti na temelju težine, duljine, sadržaja minerala u kostima (BMC), gustoće minerala u kostima (BMD), fizičke (konačna čvrstoća, maksimalna elastična čvrstoća) i geometrijskih parametara. Težina kosti i geometrijski parametri kao što su područje presjeka, drugi moment inercije, srednja relativna debljina stjenke značajno su porasli u pokusnoj skupini 56 dana starih praščića. Nadalje, pokusni obroci prouzročili su znatno više BMC-a i BMDa i poboljšali mehaničku izdržljivost kosti u smislu momenata maksimalne elastične jakosti i maksimalne jakosti. Zaključuje se da rano tretiranje praščića nakon rođenja Na-butiratom i ekstraktom Yucca schidigera-e djeluje pozitivno na razvoj i funkciju kosti tijekom razvoja
