A study was conducted to assess the effect of formulating broiler diets with productive energy (PE). 90 floor pens were assigned to five feeding phases and treated as independent experiments (before starting the phase, all birds were fed standard diets). Starter, Grower, and Finisher 1, 2 and 3 pens hold 30, 23, 18, 16 and 16 pens, respectively. Each phase included 3 treatments: T1, diets formulated with apparent metabolizable energy (AMEn), and T2 and T3 formulated with PE (83 and 92% of PE requirement, respectively) to obtain a linear response. BW, BW gain (BWG), feed intake (FI), feed conversion ratio (FCR), and mortality (MO) were determined by phase. BWG was fitted to Gompertz curve first derivative and cumulative BW (cBW) and BWG (cBWG) were calculated. Cumulative FI (cFI) was obtained based on FCR and cBWG and cumulative European Broiler Index (EBI) was calculated. 9 additional pens were fed the treatment diets continuously 1-56 days, and 148 birds were processed at 56 d to determine carcass (CAR), leg quarters (LQU), wings (WIN), and breast meat + wing (BPW) yields and woody breast (WB) and white stripping indexes (WS). Feeding cost was calculated per bird (FCB), per kg BW (FCW), and per kg carcass (FCC). Market value (MKV, $/bird) was determined based on each cut-up piece weight and its market price, gross profit (GPR, $/bird) as MKV – FCB, and ROI as GPR/FCB. All data was adjusted to processing weights. 100% PE requirement response (T4) was estimated by the linear regression of T2 and T3. Bootstrapping and Monte Carlo techniques were applied in JMP Pro 16 to obtain T4 data. ANOVA and Student’s t-test were applied. Actual continuous feeding of PE diets produced higher BW (P=0.01) than those calculated based on independent phases, suggesting an improved protein synthesis rate the higher the diet PE. Increasing PE (T2 to T3) produced linear positive effects on cFCR, EBI, CAR, LQU, WIN, FCC, and ROI (P≤0.05). T4 reported better cBW, cBWG, cFCR, EBI, CAR, LQU, FCC, MKV (P<0.001), GPR (P=0.002), and ROI (P<0.001) than T1. In conclusion, PE shows potential to improve production efficiency and economics of broiler production compared to AMEn.

Martinez, D., C. Umberson, E. Sheikhsamani, S. Johnson and C. Coon. 2025. Performance, Processing Yield, and Economics of Broilers Fed Diets Formulated with Productive Energy. 2025 International Poultry Scientific Forum, Abstract T203.