the effects of antipecking devices combined with different physical forms of feed were studied on the performance of 900 Muscovy ducklings. The trial was divided into three replications performed in succession. In each replication the animals were reared in 12 pens with a density of 5 birds/m2 and fed two kind of ad libitum distributed diets: starter (S) 1-42 d and finisher (F) 43d - slaughtering age. Each union treatment*physical form was allocated by randomization to one open pen in each replication. Four tretmments were tested: control (no antipecking devices), 7 d.o. beak trimmed, 21 d.o. beak trimmed and 21 d.o. blinkered. Three physical forms of feed were tested: Pellet (S) > Pellet (F), Crumble (S) > Pellet (F) , Mash (S) > Mash (F). The results show the worst performance in the control and treated groups fed with mash diet. Mash diet produces higher feed consumption and lower conversion efficiencies than the processed diets. The 7 and 21 d.o. beak trimming redice growth rate during the week following the treatment, particulatly when the pellet diet is employed. At slaughtering age the animals recover the productive performance completely. It may be explained by the compensative growth. Blinkers do not affect the performance of duck. Pelletted diets improve performance independently of antipecking devices employed.
|Autori:||Paci, G; Bagliacca, M.; Mori, B.; Marzoni, M.; FEDELI AVANZI, C|
|Titolo:||Effetto della forma fisica del mangime e dei trattamenti antipica sulle performance dell'anatra muschiata|
|Anno del prodotto:||1992|
|Appare nelle tipologie:||1.1 Articolo in rivista|