Aim of this trial was to investigate the effects of high chromium yeast supplemented diets on growing-finishing rabbits performances. Ninety-six commercial hybrid rabbits, half males and half females, aged 35 d, were divided in 4 experimental groups and fed, ad libitum, during 49 days a same diet supplemented with 0 (T1), 400 (T2), 800 (T3) and 1600 (T4) ppb of Cr. Control diet (T1) was analysed to contain 789 ppb Cr, level which is probably due the content of this element in raw materials. Cr content of all the diets was then proportionally increased. Chromium supplementation did not improve, at any dosage, daily weight gain, feed to gain ratio, hot carcass weight, dressing out percentage, kidneys incidence, scapular fat deposit, left hind leg percentage and its meat/bone ratio, meat pH and colour. Perirenal fat deposit was on the contrary significantly (P = 0.013) higher in all the rabbits which received Cr supplementation, probably as a result of a modification in lipid metabolism. The liver percentage of T3 rabbits was significantly higher than that of T1 group (P= 0.028). Authors however outline the substantial lack of effects of Cr yeast on growing rabbit.[...]
Effets de l'utilisation de levures enrichies en chrome sur la production du lapin en croissance
LAMBERTINI, Lamberto;VIGNOLA, Giorgio;
2000-01-01
Abstract
Aim of this trial was to investigate the effects of high chromium yeast supplemented diets on growing-finishing rabbits performances. Ninety-six commercial hybrid rabbits, half males and half females, aged 35 d, were divided in 4 experimental groups and fed, ad libitum, during 49 days a same diet supplemented with 0 (T1), 400 (T2), 800 (T3) and 1600 (T4) ppb of Cr. Control diet (T1) was analysed to contain 789 ppb Cr, level which is probably due the content of this element in raw materials. Cr content of all the diets was then proportionally increased. Chromium supplementation did not improve, at any dosage, daily weight gain, feed to gain ratio, hot carcass weight, dressing out percentage, kidneys incidence, scapular fat deposit, left hind leg percentage and its meat/bone ratio, meat pH and colour. Perirenal fat deposit was on the contrary significantly (P = 0.013) higher in all the rabbits which received Cr supplementation, probably as a result of a modification in lipid metabolism. The liver percentage of T3 rabbits was significantly higher than that of T1 group (P= 0.028). Authors however outline the substantial lack of effects of Cr yeast on growing rabbit.[...]I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
