PSI-8 Digestible Energy and Metabolizable Energy Prediction Using Chemical Composition of Feces with no Dietary Information

Abstract The objective of the present study was to develop prediction equations for digestible energy (DE) and metabolizable (ME) in swine diets based on chemical compositions feces with no dietary information. A total 262 fecal samples obtained from growing pigs fed 27 4 experiments were used. mainly corn, soybean meal, other plant-originated feed ingredients. In digestibility experiments, urine quantitatively collected using marker-to-marker procedure. diet analyzed dry matter (DM), crude protein, ash, neutral detergent fiber (NDF). Digestible ranged 2,907 4,374 kcal/kg DM ME 2,774 3,983 DM. Fecal ash positively correlated DE (r = 0.81, P < 0.001) 0.66, whereas NDF negatively –0.66, –0.74, 0.001). developed components were: 88.1 + 0.37 × – 0.28 (R2 0.57, 0.001); (kcal/kg DM) 3,604 32.8 11.1 0.71, 4,077 15.7 18.1 0.63, where are expressed as % conclusion, digestibility, values, values concentrations can be predicted without