Lipolytic Diet to Control Carcass Fat Deposition of Growing Chicks

Abstract

In two experiments, 130 hybrid meat-type chicks of 8-week-old were fed lipogenic diet for preliminary period of 6 days. Then, the chicks were separated into groups of 4 males and 4 females each and fed various experimental diet for 6 days. The chicks were sacrificed at the beginning of preliminary feeding period, and 0, 3 and 6 days on the experimental diets to measure abdominal adipose tissue and liver.
As observed with starting chicks previously, the chicks grew normally and gained abdominal fat linearly on lipogenic low-protein and high-energy diet. After 6 days on the experimental diet, it was observed that the level-up of dietary protein and the leveldown of dietary energy and significant lipolytic effect, that is, to decrease abdominal fat level. The level-up of protein by 9% correspounded to the level-down of dietary energy by 20% of total digestible nutrients, and their effects were independent from each other.
It is estimated that 1% of dietary protein corresponds to -9.44kcal of metabolizable energy per g of diet, and that 1g of protein taken by the chicks correspounds to -1.38 kcal of metabolizable energy.