Lysine and Energy Trends in Feeding Modern Commercial Broilers

Very interesting article. I understand that it is important to consider that there is no deposition of protein without a corresponding amount of fat, which is defined by the genetics of the animal. Therefore, it seems to us more reasonable to consider that the decrease in the energy requirement would be indicative that the proportion of fat in relation to the deposited protein has decreased with genetic selection. In turn, increased lysine requirement would be associated with increased deposition of body protein. These possible changes in body composition would result in improved feeding efficiency of the birds. Consistently with these considerations, it can be deduced that the increase in the energy demand and the reduction of lysine with the increase of age of the birds, as reported in the text, would occur due to the increase in the ratio of fat to that of protein.

Very nice article, thanks to authors.