A 3x2 factorial arrangement was used in the study to evaluate the apparent nutrient and amino acid
digestibility of local Muscovy ducks in two periods. Two factors of the trial were dietary lysine levels (0.8%, 1.0% and
1.2%) and metabolizable energy (ME) levels (12.55MJ/kg DM and 12.97MJ/kg DM) for 8-week-old period; and
dietary lysine levels (0.7%; 0.9%; 1.1%), and ME levels (13.39MJ/kg DM; 13.81 MJ/kg DM) for 10-week-old period.
There were three replications and four ducks per experimental unit. The findings indicated that the apparent nutrient
digestibility coefficients of DM, OM, and EE were significantly higher for the Lys 1.2 and Lys 1.1 treatments in
both periods (Pand of isoleucine, leucine, phenylalanine in the ME 12.97 treatment were significantly (Pthe other treatments. At 10-week-old period, the Lys 1.1 and ME 13.81 treatments had some better essential amino
acid digestibility values, particularly, arginine, isoleucine, lysine; and methionine isoleucine, lysine, methionine, and
threonine (Pperiods) were significantly (Pat 8 weeks and 10 weeks of age, the appropriate diets contained 1.2% lysine and 12.97 MJ ME/kg DM, and 1.1%
lysine and 13.81 MJ ME/kg DM, respectively.
Keywords | Amino acid, Digestibility, Local Muscovy duck, Lysine, Metabolizable energy