Information
Professional Title: Professor
Broiler nutrition, laying nutrition, broiler breeders nutrition (female and male), duck nutrition, quail nutrition, diet balance and formulation,
Location: Makkah, Saudi Arabia
Article published the August 24, 2026
1. IntroductionSeveral agricultural and agro-industrial by-products are produced during the production or processing of fruits and vegetable crops, which may cause environmental pollution. These by-products were of great interest during the COVID-19 crisis due to lockdown, close of dry borders and ports and traffic restrictions [1,2]. The use of alternative feedstuffs and locally available feed in ...
Article published the August 24, 2026
1. IntroductionNowadays, alternative protein sources are essential due to the future perspectives of increasing the world’s human population [1] and limited grain supplies after the COVID-19 crisis and the Russia–Ukraine war. Insects are valuable protein supplies for animal nutrition [2–4] because of their high nutritive value and the limited natural resources (water, land, and f ...
Article published the August 4, 2026
IntroductionThe increasing world population and the growing demand for animal-based foods are driving research towards alternative, sustainable and low-environmental impact protein sources for livestock feed. In this context, edible insects, in particular the black soldier fly (Hermetia illucens L., BSF), are increasingly recognised as a valuable alternative resource for animal nutrition due to th ...
Youssef Attia likes the comment:
@Dr. Fiodor S. Marchenkov, totally agree, but there is also a big problem that impacts response of enzymes, most individual matrices are also evaluated under conditions that do not apply in practice, look values from phytase commercial phytases, blame 5 - 10 improvement on amino acids digestibilities at 500 ftu, but several New publications confirm papers published with Dr. Parsons lab, matrices d ...
Youssef Attia likes the comment:
@Pirzado M Zakria when you are using phytase you should spare calcium and phosphorus, when you are using protease you can spare amino acids and when NSPase you can spare energy from your diet according to supplier's recommendations, it is simple rule.
Participation in Forum on February 2, 2024
@Akbar YaghobfarThanks for valuable information and contributions, the gut environment is also important and gut maturation is also essential as well as the strain of chickens broilers vs. layers, ducks and quail.There are many contributing factors to the nutrient matrix value of enzymes.
Participation in Forum on February 1, 2024
I think the ME for enzymes depends birds age, enzymes composition, dietary /feedstuffs composition and energy value of the diet but it is safe to assume that it is equal to 50 kcal per kg diet but again depends on factors mentioned above.
Article published the December 13, 2023
1. IntroductionThe use of antibiotics growth promoters (AGPs) has been a common practice in intensive poultry production to improve animal growth performance, health, and sustainability of animal farming (1). However, AGPs threaten human health due to the risk of developing antimicrobial resistance and drug residue in poultry products (2). Consequently, AGPs have been prohibited in several countri ...
Article published the May 9, 2023
1. IntroductionThe use of a low-crude-protein diet fortified with essential amino acids is a part of a precision feeding and has gained commercial acceptance to improve protein utilization, minimize environmental impact and thus increase the sustainability of broiler production, because it reduces the cost of production [1–3]. Protein accounts for the second most expensive nutrient in poultr ...
Article published the March 1, 2023
IntroductionMicroorganisms constitute the largest fraction of biodiversity on Earth. Their functions are highly diverse, with fundamental roles to maintain chemical equilibria and cycles in their respective environments. It is, therefore, surprising that many humans consider all microorganisms as ”dangerous”, particularly when it comes to equating bacteria with pathogens (Musso et al., ...