Aim of this study was to determine the apparent digestibility coefficients (ADC) and the apparent metabolizable energy (AME) of a partially and a totally defatted black soldier fly meal (BSFp and BSFt) in broiler chickens using total collection of feces. A basal diet was formulated and two assay diets were developed by substituting 250 g/kg (w/w) of the basal diet with the two BSF meals respectively. Male 1-d-old male broiler chickens (Ross 308) were raised in floor pens until the age of 21 d. On day 21, 60 birds were randomly assigned to 15 cages. The birds were offered a commercial broiler finisher diet until the introduction of assay diets on day 26. On day 26, five replicate cages were randomly assigned to each assay diet. The digestibility was evaluated from 31 to 34 d. Data were tested by Student t-test. The DC for dry matter (DM), organic matter (OM), crude protein (CP), crude fat (CF), gross energy (GE) and AME of BSF meals were calculated. Correction for zero nitrogen (N) retention was made in order to estimate the N-corrected AME (AMEn). The DC of DM, OM, CF and GE were higher for BSFp than BSFt (P<0.05). No statistical differences were found for DC-CP. As expected AME value was higher in BSFp than BSFt (18.01 and 13.27 MJ/kg, respectively) (P <0.001).The same trend was observed for AMEn (16.62 and 11.59 MJ/kg, respectively). This study has provided updated DC of BSFp and BSFt, besides the acquired knowledge of AME and AMEn will be useful for nutritionists and feed companies.
Apparent digestibility and metabolizable energy value of a partially and totally defatted Black Soldier fly meal in broiler chickens
F Gai;
2016
Abstract
Aim of this study was to determine the apparent digestibility coefficients (ADC) and the apparent metabolizable energy (AME) of a partially and a totally defatted black soldier fly meal (BSFp and BSFt) in broiler chickens using total collection of feces. A basal diet was formulated and two assay diets were developed by substituting 250 g/kg (w/w) of the basal diet with the two BSF meals respectively. Male 1-d-old male broiler chickens (Ross 308) were raised in floor pens until the age of 21 d. On day 21, 60 birds were randomly assigned to 15 cages. The birds were offered a commercial broiler finisher diet until the introduction of assay diets on day 26. On day 26, five replicate cages were randomly assigned to each assay diet. The digestibility was evaluated from 31 to 34 d. Data were tested by Student t-test. The DC for dry matter (DM), organic matter (OM), crude protein (CP), crude fat (CF), gross energy (GE) and AME of BSF meals were calculated. Correction for zero nitrogen (N) retention was made in order to estimate the N-corrected AME (AMEn). The DC of DM, OM, CF and GE were higher for BSFp than BSFt (P<0.05). No statistical differences were found for DC-CP. As expected AME value was higher in BSFp than BSFt (18.01 and 13.27 MJ/kg, respectively) (P <0.001).The same trend was observed for AMEn (16.62 and 11.59 MJ/kg, respectively). This study has provided updated DC of BSFp and BSFt, besides the acquired knowledge of AME and AMEn will be useful for nutritionists and feed companies.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
