Julián Melo

I. INTRODUCTION Papers have been presented at the past two APSS meetings on the subject of low protein diets (Kidd and Choct, 2017; Hilliar and Swick, 2018; Lambert and Corrent, 2018). Few, if any, have taken note of the economics of such diets. This paper is an examination of the costs of low protein diets. A brief history of amino acids is worth reviewing. Each time a limiting amino acid became ...

INTRODUCTIONIt has been well known that branched-chain amino acids (BCAA) (Val, Leu and Ile) are not only substrates for building block protein but they are also involved in intracellular signaling pathways on protein anabolism and stimulatory effects on protein synthesis. Among the 3 BCAA, Leu has been considered most effective in stimulating muscle protein synthesis by modulating the activation ...

1. IntroductionHumphry Davy, a British chemist, was the first to isolate and investigate the chemistry of calcium (Ca) and to recognise it as an essential component of bone in 1808. Ever since, it has been the subject of a voluminous amount of research in both human and animal nutrition. Today, the biological significance and economic importance of Ca in animals are intuitive. Calcium is the most ...

I. INTRODUCTION Broiler diets are formulated on the basis of ideal protein ratios (IPR) where selected amino acid requirements are expressed relative to lysine (100). However, IPR have been developed over decades for standard diets rather than diets with reduced-CP. This has led to the possibility that reduced-CP diets require modified IPR. For this reason, two sets of ratios were evaluated in die ...

IntroductionAn essential component of the overall health and well-being of the broiler chicken is ensuring that mineral nutrition, in all its facets, is adequate. As growth rates increase and production systems intensify, mineral nutrition will become more critical. Most minerals in the bird occur in the skeleton, so skeletal integrity is perhaps the critical issue. However, minerals play a role i ...

INTRODUCTIONAs we learn more about the negative impacts of calcium (Ca) on the availability of phosphorus (P), it highlights how little we know about Ca requirements, digestibility of Ca in ingredients, and their impact on P digestibility (Angel, 2019). These impacts can be direct or indirect through chelation with phytate, which can have a profound impact on the efficacy of phytase. Historically ...

BackgroundInvestigations in reducing dietary crude protein (CP) in chickens began in the early 1940’s, which commenced nearly a century of exploration in this area of poultry nutrition research. Advances have been made, but many of the hurdles identified in the 1940’s vex poultry nutrition researchers today. Most notably, in the early 1940’s research was carried out in chickens f ...