Effect of feeding maltodextrins and dextrose on rearing and slaughtering performance of immunocastrated male pigs.

italianoI suini immunocastrati, se alimentati ad lib. , producono carcasse troppo grasse a causa dell’elevata assunzione di mangime: si e voluto verificare se maltodestrine (M) e destrosio (D) nella dieta ne riducano i consumi. Trentasei suini maschi (Duroc Italiano x Large White Italiano), uniformemente distribuiti in 9 box, trattati con doppia iniezione immuno-castrante a 90 e 162 giorni di eta, sono stati alimentati dalla seconda iniezione (103,04 ± 6,47 kg p.v.) alla macellazione (197 giorni di eta; 144,51 ± 9,70 kg), con una delle diete sperimentali: controllo, ad lib. (CL); controllo, razionata al 7,5% p.v. 0.75 (CR); con MD (3,5 + 3,5%; bilanciata per energia e proteina), ad lib. (MD). La dieta CR e stata introdotta come alternativa per evitare carcasse troppo grasse. I gruppi CL e MD hanno mostrato IPG (1325 e 1325 vs 905 g/d), consumo alimentare (4630 e 4637 vs 2760 g/d) e ICA (3,53 e 3,52 vs 3,11) statistica - mente piu elevati (P abbiano mostrato prestazioni simili in allevamento e alla macellazione indipendentemente dall’inclusione di M e D nella dieta. EnglishThis study aimed to verify previous research findings showing that feeding maltodextrins (M) and dextrose (D) leads to a reduction of voluntary feed intake in the Italian heavy pig. This may be interesting for immunocastrated pigs fed ad libitum (ad lib.), whose feed intake skyrockets after the 2nd vaccination, causing too fatty carcasses at slaughtering. Thirty-six male pigs (Italian Duroc x Italian Large White crossbred) received a double immunocastrating injection at 90 and 162 days of age. At 120 days, weighing 51.84+4.38 kg, the subjects were evenly housed in 9 boxes, fed ad lib. till the 2nd injection and then given, until slaughtering (197 days of age; 144.51±9.70 kg), one of the experimental diets: control diet, ad lib. (CL); control diet, restricted at 7.5% l.w.0.75 (CR); with MD (3.5 + 3.5%; adjusted for energy and protein), ad lib. (MD). The CR diet was introduced as the alternative choice to avoid too fatty carcasses. Compared to the restricted ones, pigs fed ad lib. (with or without MD) showed statistically higher (P