Age-dependent response to fasting during assessment of metabolizable energy and total tract digestibility in chicken

Predicting metabolizable energy of soybean meal and rapeseed meal from chemical composition in broilers of different ages

“…All data were expressed on DM basis. The AME and AMEn of the experimental diets were calculated by the following formulas ( Wang et al, 2022 ): in which FI is the feed intake (kg DM); GE d is the GE content of diet (kcal/kg DM); EO is the output of excreta (kg DM); GE e is the GE content of excreta (kcal/kg DM); RN (retained nitrogen, g) = diet intake (g) × nitrogen content of diet – excreta output (g) × nitrogen content of excreta; and 8.22 kcal/g is the GE of uric acid per gram of nitrogen ( Hill and Anderson, 1958 ).…”

Broiler breeder nutrition affects chick quality and offspring performance : Fat or lean or in-between?

“…It can be speculated that EGC breeders had less fasting time during the day, compared to SGC breeders. Fasting can improve digestibility of metabolizable energy in the diet with 1.8% compared to non-fasting (Wang et al, 2022). Assuming a 1.8% higher AME n availability for SGC breeders (on average 7.7 kcal/d), would result in a 0.02 lower predicted k e value on average for SGC breeders, which is then comparable to predicted k e values for EGC breeders.…”