Technical bulletins
The results obtained from our experimental program and from the literature are compiled and presented in our technical bulletins
Please select a bulletin bellow:
Bulletin 37 Formulating Pig Grower Diets With No Minimum Crude Protein - Essential Amino Acids Requirements, Energy Systems and Low Protein Diets
Bulletin 36 Update on the next limiting amino acids in broiler feeds - Reducing dietary crude protein level
Bulletin 35 Branched-chain amino acids nutrition in piglets - Requirements and practical implications
Bulletin 34 SID Trp:Lys requirement for piglets determined by meta-analysis
Bulletin 33 L-Valine: Break through the feed optimisation barrier!
Bulletin 32 Formulator Handbook - Measuring and Predicting Amino Acid Contents in Feedingstuffs
Bulletin 31 Threonine in pigs and broiler: A crucial amino acid for growth and gut function
Bulletin 30 Tryptophan in young pigs - An essential nutrient with numerous biological functions
Bulletin 29 Impact of the withdrawal of antimicrobial growth promoters and health status on the amino acid requirement of the pig
Bulletin 28 Tryptophan in young pigs: a key nutrient for growth and feed intake
Bulletin 27 Amino acid nutrition of the broiler chicken - Update on lysine, threonine and other amino acids
Bulletin 26 Threonine requirement in pigs - Benefits of L-Threonine supplementation
Bulletin 25 Low protein diets for piglets
Bulletin 24 Managing growth and carcass quality of growing pigs fed low protein diets
Bulletin 23 L-Tryptophan supplementation to enhance piglet growth
Bulletin 22 Prevention of nitrogen pollution from pig husbandry through feeding measures
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Bulletin 37 - October 2011
Formulating Pig Grower Diets With No Minimum Crude Protein - Essential Amino Acids Requirements, Energy Systems and Low Protein Diets
A review of the available scientific information concerning dietary amino acid requirements in growing and finishing pigs is presented in the new Bulletin #37. The assessment of a new ideal amino acids profile allows to safely formulate pig feeds to each essential amino acid instead of using crude protein. This technic has been demonstrated to reduce dietary crude protein without detrimental effect on pig performance and allows to save feed costs by reducing the incorporation of expensive protein-rich feedstuffs. In addition, a significant reduction of the environmental impact of the pig production is realized through lower nitrogen excretion. Energy systems are also described to take advantage of the most advanced nutritional concepts.
Format PDF - 3.9 Mo
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Bulletin 36 - June 2010
Update on the next limiting amino acids in broiler feeds - Reducing dietary crude protein level
A literature review to determine which amino acids are next limiting in broiler feeds after sulphur amino acids, lysine and threonine. Reviews of dose-response studies allow the estimation of the valine and isoleucine requirements in broiler. This update of the ideal amino acids profile in broiler is a tool to help the feed formulators to reduce the dietary crude protein level and to formulate broiler feeds more efficiently.
Format PDF - 2.8 Mo
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Bulletin 35 - June 2010
Branched-chain amino acids nutrition in piglets - Requirements and practical implications
A complete review of the information available about the branched-chain amino acids (BCAA): Valine, Isoleucine and Leucine. The common catabolism of the BCAA is presented in details and clear recommendations about the BCAA requirements are given to efficiently formulate feeds for piglets. Practical impacts on feed formulation in terms of lysine levels and dietary crude protein reduction are also discussed.
Format PDF - 4.1 Mo
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Bulletin 34 - July 2009
SID Trp:Lys requirement for piglets determined by meta-analysis
The first work of meta-analysis about the tryptophan requirement in piglets: More than 100 experiments have been studied and, following the meta-analytic steps, 41 trials have been selected to estimate the SID Trp:Lys requirement. A discussion about the most adapted model to depict the piglet response results in the confirmation of the SID Trp:Lys requirement at 22% in piglets.
Format PDF - 1.1 Mo
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Bulletin 33 - May 2009
L-Valine: Break through the feed optimisation barrier!
This bulletin makes a review of available data about requirement and response to valine in piglet. Moreover, it demonstrates that valine is limiting before isoleucine in today feed and describes the interactions between branched-chain amino acids (valine, isoleucine, and leucine). Thus, it gives to nutritionist the keys to optimize feed formulation on all indispensable amino acids.
Format PDF - 1.6 Mo
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Bulletin 32 - November 2008
AJINOMOTO EUROLYSINE S.A.S. Formulator’s Handbook - Measuring and Predicting Amino Acid Contents in Feedingstuffs
It is the formulator's task to produce feed recipes with given nutritional values, despite the raw materials to be mixed having different and variable characteristics. This guide is designed for all the nutritionists (in the feed industry as well as in research and education) who formulate diets and/or are involved in ingredient and feed evaluations. The objective is, based on our own experience in amino acids, to propose and compare several practical tools to determine the nutritional value of ingredients, with a view of better controlling the nutritional value of the resulting compound feeds.
Format PDF - 2.1 Mo
Prediction of the amino acid contents
in 11 ingredientsFormat XLS (Microsoft Excel) - 300 Ko
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Bulletin 31 - June 2008
Threonine in pigs and broiler: A crucial amino acid for growth and gut function
This literature combines more than 90 publications and determines pigs and broiler requirement in function of their ages/weights. Gestating and lactating sows' requirements are also described.
Threonine, as tryptophan, has numerous physiological roles. Mucins (glycoprotein protecting intestinal mucosa) and immunoglobulins are very rich in threonine. A deficiency in this amino acid leads to a significant reduction of these protecting proteins. This publication describes also the effect of sanitary conditions on threonine requirement.
Format PDF - 1.3 Mo
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Bulletin 30 - March 2008
Tryptophan in young pigs - An essential nutrient with numerous biological functions
Sixteen pages of comprehensive review on the significance of tryptophan in pig nutrition.
Unlike many other amino acids, tryptophan presents the particularity to be involved in various biological functions other than protein synthesis: regulation of appetite, regulation of behaviour, immune response... Various experiments conducted in young pigs either with good health status, or submitted to inflammation or stress challenges, have shown that insufficient dietary tryptophan supply results in poorer performance. Supplementation enhances the animal responses in a curvilinear manner so that optimal level can be recommended.
Format PDF - 1 Mo
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Bulletin 29 - June 2006
Impact of the withdrawal of antimicrobial growth promoters and health status on the amino acid requirement of the pig
Since 2006, the complete ban of antimicrobial growth promoters (AGP) in the diet for pigs and poultry is effective in Europe. The direct impact of this regulation on animal performances is difficult to quantify but it will likely increase variability performances and penalize technical and economic results. Once AGP are removed, health status becomes an even more critical factor. This bulletin proposes a series of trials in growing pigs and piglets that aim to test the impact of the AGP withdrawal on amino acids requirements.
Format PDF - 1 Mo
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Bulletin 28 - June 2005
Tryptophan in young pigs: A key nutrient for growth and feed intake
A review about the tryptophan requirement for optimum growth performance of young pigs between 7 and 30 kg and the relation between dietary tryptophan and feed intake. A specific focus is made on the works describing the strong relation between tryptophan and the immune functions, and on the potential consequences on the tryptophan requirement for growth of pigs.
Format PDF - 1.6 Mo
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Bulletin 27 - June 2004
Amino acid nutrition of the broiler chicken - Update on lysine, threonine and other amino acids
and other amino acids An update about the ideal amino acid profile in broiler to fully express its genetic potential. The requirements for potentially limiting amino acids are being questioned as they impact upon protein deposition and muscle growth and some other functions like digestion and immunity (threonine). At the same time, environmental regulation is seeking for lower dietary protein levels in order to limit the impact of production on nitrogen pollution and this also requires a better understanding of amino acids requirements.
Format PDF - 2.9 Mo
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Bulletin 26 - September 2002
Threonine requirement in pigs - Benefits of L-Threonine supplementation
Besides its utilisation for protein synthesis (growth and milk synthesis), threonine is involved in some other physiological functions, such as digestion and immunity. As a consequence, the whole threonine requirement is likely to vary according to the importance of each function. Assessing threonine requirement for a given physiological stage is then a key for formulating amino acids balanced feeds.
Format PDF - 0.7 Mo
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Bulletin 25 - March 2002
Low protein diets for piglets
Lowering feed protein level appears as a practical nutritional solution to decrease the incidence and severity of digestive disorders leading to diarrhoea problems in piglets. However, lowering the protein should not be done at the expense of growth, since good performance in the piglet phase is shown to improve the overall growth of the pigs. Reducing the crude protein level in the feed thus requires the use of adequate nutritional systems to control indispensable amino acids supply.
Format PDF - 0.6 Mo
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Bulletin 24 - May 2001
Managing growth and carcass quality of growing pigs fed low protein diets
The development of low protein diets in pig production is sometimes restricted, because of the possible association with lower growth performance and fatter carcass. The study of these questions reveals that when amino acid and energy supplies are estimated properly, with accurate and practical nutritional systems (digestible amino acids, net energy), carcass quality, as well as pig growth performance can be kept under control.
Format PDF - 0.6 Mo
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Bulletin 23 - September 2000
L-Tryptophan supplementation to enhance piglet growth
Growing animals need tryptophan for protein deposition and also for various metabolic functions, the most important for pig production being appetite regulation. Tryptophan’s role in growth and feed intake is well documented, but not necessarily quantified. The aim of this document is to highlight the benefits of manipulating tryptophan levels in piglet feeds through L-Tryptophan supplementation.
Format PDF - 0.7 Mo
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Bulletin 22 - June 2000
Prevention of nitrogen pollution from pig husbandry through feeding measures
Feeding low protein diets to pigs is one of the best available techniques to reduce the nitrogen pollution load from pig husbandry. A complete literature review demonstrates that this technique allows to reduce the nitrogen excreted in pig slurry by 25% to 50% and to decrease the ammonia emission in buildings and in the environment by up to 50%. Pigs fed low protein diets and having free access to water reduce their voluntary water intake by 10 to 30% and excrete 10 to 30% less urine so there is less slurry to handle.
Format PDF - 2.1 Mo