Emma Bradbury

I. INTRODUCTIONIn poultry meat production birds face several challenges, all of which disturb the normal functioning of the organism, with the gastrointestinal tract being the most affected. This results in impaired absorption of nutrients, leading to reduced performance and increased mortality. Previously general practice was to feed antibiotics at sub-therapeutic levels to enable birds to cope w ...

Published literature indicates that L-arginine (L-Arg), guanidinoacetic acid (GAA) and L-citrulline (L-Cit) can all provide arginine activity in broiler diets (Su and Austic, 1999; Dilger et al., 2013; DeGroot, 2018) and all are commercially available. GAA has been reported to have 77% arginine equivalence for feed conversion (Ringel et al., 2013). This study was conducted to determine the effect ...

Protein is the second most expensive nutrient in animal feed formulation, after energy. Diets which have excess crude protein can overload the gastrointestinal tract with excess amino acids and undigested protein (Apajalahti and Vienola, 2016), resulting in impaired feed efficiency, health and welfare issues as well as negative environmental impacts via excess nitrogen excretion. Reducing dietary ...