Better Energy utilization: Key for Profitable Poultry Farming

What should be the energy:Lysine ratio for all the feeding stages of broiler?

Thanks for your question Mr Asad. Though I am not the expert but try to attempt it. As per some studies its 3.48–3.80 g dLys/Mcal (Lysine requirements of young broiler chickens are
affected by level of dietary crude protein by M. Urdaneta et al, 2005)

The Lysine ratio in the feed depends upon crude protein%, various protein sources of the diet and least control by energy. Lysine requirement in a diet may varies from 1.02% to 1.36% as Crude Protein level of the diet varies from 18% to 24%. It also depends upon the arginine and potassium levels in the diet (antagonistically related). In nutshell, we have to look into various other factors before concluding lysine level in the broiler diet. It may vary diet to diet. However, some experts has given the Lysin requirement for broiler as below:
Amino Acid (%diet) (adapted from Hurby et al,1995)
Week 1 2 3 4 5 6
Lysine 1.32 1.13 0.94 0.93 0.91 0.9
* Week 1-3 @3000kcal AMEn/kg
* Week 4-6 @3050kcal AMEn/Kg
Please go through the article in Engormix titled "Lysine and Energy Trends in Feeding Modern Commercial Broilers" for more details

Sir does the type of my protein source affects the relative amount of lysine to be used? e.g in my own country we majorly formulate poultry feeds with ground nut cakes and soya as a protein source.