Measures of Feed Energy- Gross Energy, Digestible Energy, Metabolisable energy, Net Energy

Unit- I, Lecture- 5 discusses measures of feed energy. It begins by outlining the objectives of imparting knowledge on partitioning of feed energy for livestock. It then defines various measures of feed energy from gross energy to net energy. Gross energy is the total energy in a feed. Digestible energy is gross energy minus energy lost in feces. Metabolizable energy is digestible energy minus losses in urine and gas. Net energy is metabolizable energy minus heat produced during digestion. The lecture provides details on how each form of energy is calculated and factors that can influence energy values.