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Amino acids in poultry nutrition
Adequate provision of dietary amino acids is required to maintain normal immunocompetence and protection of the host from some diseases in all species (Beski et al. 2015). Therefore, the development of immune function in poultry will be promoted if they receive sufficient amino acids in their diets. The essential amino acids for poultry are arginine, glycine, histidine, leucine, isoleucine, lysine, methionine, cystine, phenylalanine, threonine, tryptophan, and valine. Out of these, the ones critical in practical diets are arginine, lysine, methionine, cystine and tryptophan.
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Duarte Neves (Zinpro) The poultry industry is facing a problem with the fertility of broiler breeder eggs. The use of elevated amounts of trace minerals such as zinc (Zn), manganese (Mn), and copper (Cu) within a broiler breeder diet has been previously linked to an increase in eggshell quality, which in turn may lead to an increased fertility rate. A parameter that has been linked to an increased eggshell quality is shell translucency. The...
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Cibele Torres (Zinpro) This study investigated the performance of broilers fed diets formulated to optimize phytate hydrolysis in the upper gut and supplemented with reduced levels of Zn in the form of Zn amino acid complexed minerals (ZnAA). A total of 3,600 d-old straight-run Ross 308 broilers were randomly distributed across 72 floor pens. Birds received 1 of 6 diets (corn-soybean meal based) from day one to 37 d with 12 replicate pens per...
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Cibele Torres (Zinpro) shares the results of her research and highlights the improved breast yield obtained, as well as cost and environmental benefits, in this Engormix interview during IPPE 2024 in Atlanta, USA....
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Diego Martínez (University of Arkansas) explains how productive energy is a better predictor of performance, body weight gain, feed conversion and protein accretion, among other factors, in this Engormix interview during IPPE 2024 in Atlanta, USA....
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Reduced crude protein diets maintains growth and yield parameters of mixed-sex broilers while reducing nitrogen excretion
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Nelson Ruiz (Nelson Ruiz Nutrition LLC) speaks on his research presented at the IPSF regarding the evaluation of soybean meal with KOH protein solubility and trypsin inhibitor as the main measurements, in this Engormix interview during IPPE 2024 in Atlanta, USA....
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Nelson Ruiz (Nelson Ruiz Nutrition LLC) explains how to deal with both cases and offers his insights and recommendations, in this Engormix interview during IPPE 2024 in Atlanta, USA....
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Duarte Neves (Zinpro) explains how amino-acid complexed mineral supplementation to broiler breeders can positively impact eggshell quality and translucency, in this Engormix interview during IPPE 2024 in Atlanta, USA....
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Martin Steffan, Global Product Manager Biolys® at Evonik, explains the different ways in which an innovative lysine source contributes to lowering the ecological footprint in animal nutrition
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Dr. Dirk Hoehler, SVP Essential Nutrition at Evonik, provides more details on Evonik’s backward integration of their DL-Methionine plant and their global methionine production network...
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Looking back to the year 2023, the overall API market collapsed. The scarring effect left by the pandemic is hard to fade away completely; the global economy is facing downward pressure, the domestic livestock industry is in a downturn, and the prices of veterinary APIs continue to bottom out, hitting record lows. As the China Veterinary Medicine and Feed Trading Centre (CVMFTC) monitored, the VPi index for four weeks in January was 63.95, 63.41, 63.30 and 63.23. respectively....
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Lost in the Market Uncertainty Caused by the Outbreak
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I. INTRODUCTION In the 1990s, researchers from the American Soybean Association (ASA) showed that soybean meal with similar proximate analysis can perform very differently in poultry and swine feeding. Subsequently, Creswell and Swick (2008) carried out feeding trials, AME and digestible amino acid analysis of 4 soybean meals. They found that there was a large difference between the soybean meals in BWG and FCR from the broiler feeding trials as well as in AME and digestible lysine....
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I. INTRODUCTION The nutritional strategy of reducing dietary crude protein (CP) in broiler diets to improve the sustainability of poultry production has been widely reviewed in the recent years (Hilliar and Swick, 2019; Selle et al., 2020). This strategy has proven benefits on global warming potential (GWP; Kebreab et al., 2016; Cappelaere et al., 2021) and litter quality (van Harn et al., 2018). In terms of growth performance, there is still a controversy on the ability of...
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Beta-Glucan Effects on Vaccine Responses and Innate Immunity in Layers
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I. INTRODUCTION The term ‘amino acid imbalances’ was probably originated by Elvehjem and Krehl (1955) and the topic was addressed by Harper and Rogers (1965). Their conclusion was that imbalances retard growth by altering the normal pathways of amino acid metabolism. Thus, while the relevance of amino acid imbalances to efficient chicken-meat production is recognised, a precise definition has yet to be developed (Kurpad, 2018). Antagonisms between arginine and lysine...
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I. BACKGROUND The scale of the Australian chicken-meat industry has increased at an extraordinarily rapid rate so that now chicken-meat is clearly the first preference of consumers in comparison to pork, beef and lamb. In 1990/91, the Australian population was 17.2 million with a per capita chicken-meat consumption of 23.9 kg; however, this increased by 61.0% to 27.7 million people and consumption increased by 100% to 47.8 kg over the 30 years to 2020/21. As a direct consequence, the...
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Bacillus licheniformis-Fermented Products Improve Growth Performance and Intestinal Gut Morphology in Broilers under Clostridium perfringens Challenges (Extract)
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I WANT TO KNOW HOW MUCH CRUDE PROTEIN WE CAN TAKE FROM SUPPLEMENTAL AMINO ACIDS OF THE TOTAL CRUDE PROTEIN OF THE DIET. E.G., IF THE CP OF DIET IS 22%, THEN WHAT PERCENTAGE OF IT MAXIMUM SHOULD COME FROM CRYSTALLINE AMINO ACIDS. best regards anjumgojra@yahoo.com ...
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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 diets with 210 and 180 g/kg CP in a 2 × 2 factorial design. II....
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DL-Methionine (DL-Met, 99%) and liquid DL-2-hydroxy-4-methylthio butanoic acid (methionine hydroxy analogue-free acid, MHA-FA, 88%) are often used in commercial poultry feeds to meet the requirements for Methionine+Cysteine (M+C). However, differences in chemical properties and absorption decrease the relative bioavailability value (RBV) of MHAFA, which corresponds to 65% of DL-Met for performance . This study aimed to confirm that MHA-FA can be replaced with DL-Met at a...
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ABSTRACT Enteric infections such as coccidiosis and necrotic enteritis in broilers may have a large influence on the endogenous amino acids (eAA) losses within the gastrointestinal tract (GIT). Although not much is known on this topic, more information is available on the effects of these diseases on the apparent ileal digestibility (AID) of amino acids. There are many factors that must be considered when attempting to determine the intestinal flow of eAA, including age of the...
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I. Introduction Grains are the major energy sources in broiler diets. However, they also supply about 40% of the total dietary protein and contribute significantly to the provision of some indispensable amino acids (IAA; Szczurek et al., 2020). Despite the low protein content in maize, owing to its higher inclusion levels (50-70%) it may contribute approximately up to one third of the protein requirement of broilers. The inclusion of barley in poultry diets remains limited because of...
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I. INTRODUCTION Broiler breeders require adequate levels of nutrients to reach their genetic potential in terms of productive and reproductive performance, and to transfer essential nutrients from eggs to embryo for the development of chicks (Rajashree et al., 2014). It is known that oxidative stress impairs a breeder’s performance (particularly related to aging) and embryo development. This suggests that enhanced antioxidant defenses, via effective dietary...
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