Nutrient partitioning in poultry

It will be a real pleasure to reach the infirmation discussed by Dr Coon quite recently about interrelation if energy , protein and aminoacids in poultry nutrtion.. Thank you so much.

Lofgreen G.P. and W.N. Grarret developed a Net Energy System in Formulating diets for Beef Cattle. As doing so they partition the energy of the feeds into two measures, one for maintenance and a second one for weight gain. Is Dr. Coon developing something similar for poultry?. In that case I share the same interest as A.Irazusta to know more about his System. If so, it creates a new difficulty to the formulation softwares because of the interdependent nature of the two energy equations involved because each of the two energy equations applies only over a certain portion of the total feed intake. Thank you

Great topic! That will be a robust energy system to chase NE for maintenance and production. So far, there's been an ongoing debate among researchers on whether the poultry industry would benefit from a NE system over the ME system due to the following challenges: 1. Inconsistent definition of NE 2. Challenges regarding measuring heat production (Sources of heat are confounded; Non-feed factors can affect heat production) 3. Data lacking Thanks to the precision feeding technology, more data are available to adopt the NE system in poultry nutrition, eliminating the data lacking problem. That being said, we still need to consider the following considerations moving toward the next big leap: 1. Differences in heat production are usually less variable between poultry feed ingredients than in swine. However, with emerging novel feed ingredients to reduce poultry feed costs, we will need to pay attention to those ingredients' heat production. 2. Uniform body weight, environments, diets, and production systems make it unnecessary to use the NE system. However, achieving those ideal conditions might not be as easy as it seems.

Dr Mohammad Afrouziyeh You are right we are witnesses of a debate among researchers and poultry practical nutritionist about the benefits or merits of a NE system over the consistent and very well known AMEn energy system. Moreover you listed at least three challenges to be overcome ; and thereafter you stated factors that " make unnecessary " to use the NE system in poultry nutrition. Looking at this matter " Net Energy in Poultry " I found a very interesting paper called NE in poultry its merit and limits. The authors were JD van der Klis and JM Jansman published in 2019 J-App.Poultry Res. Res. 28: 499/505.

Great topic. Hafez-Berlin

nutrients partitioning in poultry birds