ANSC 3120 Lecture Notes - Lecture 9: Lactation, Calorimeter, Allantoin
19 Nov 2016
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Partitioning of energy - breakdown of how feed energy is used by the animal. ~ measures potentially available energy not actual available energy (not concerned w. digestibility) Kcal/g, kj/g, kcal/kg, or mcal/kg, mj/kg when dealing with large animals. 1 kj (joule) = . 239 kcal or 1 kcal = 4. 184 kilojoules. Determined using bomb calorimeter oxidizing (burning) to see how much energy is released. Fat has a lot more potential energy (1g fat supplies 2. 25 the energy cho supply) May indigestible or potentially digestible (~feeding corn to cattle and human, comes out whole) Once we account for all the processes that the ge in feed is exposed to, only 40% of total energy is being used for maintenance and production. The same for grain (high in cc, alpha) and straw (high in ndf, beta) Dietary energy which escapes digestion and absorption. = source of greatest loss of feed energy. Rate of passage (how fast feed traveling through git)
