Gilles Tran

Association Française de Zootechnie

À travers l’importance des surfaces valorisées (plus de la moitié de la surface agricole française) et l’importation d’une partie des matières premières riches en protéines, l’alimentation des ruminants est au cœur des enjeux techniques, économiques, environnementaux et sociétaux des élevages. Le changement climatique affecte déjà les calendriers f...

Locusts may cause massive destruction of crops and pastures and adversely affect livelihoods and food security of farmersand pastoralists. Like other insects, locusts and grasshoppers are rich in protein (50–65% in dry matter) and their essentialamino acid composition is good. In the diets of poultry, pigs and fish, replacement of up to 25% of the...

Locusts may cause massive destruction of crops and pastures and adversely affect livelihoods and food security of farmers and pastoralists. Like other insects, locusts and grasshoppers are rich in protein (50–65% in dry matter) and their essential amino acid composition is good. In the diets of poultry, pigs and fish, replacement of up to 25% of th...

Use of local raw materials in broilers feed to improve French protein autonomy The autonomy for Protein-Rich resources of poultry feed in France is around 40%, due in particular to massive imports of soybean meals, which are economically and nutritionally competitive. The study of new French Protein-Rich Feedstuffs (FPRF) within the framework of VO...

African locust bean (Parkia biglobosa & Parkia filicoidea)

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Last updated on April 19, 2018, 12:13

Partie 4 : Les valeurs de référence des aliments : tables et prévision

Partie 4 : Les valeurs de référence des aliments : tables et prévision

Partie 4 : Les valeurs de référence des aliments : tables et prévision

Last updated on April 26, 2017, 10:52

Crimson clover (Trifolium incarnatum)

Feedipedia.org A programme by INRA, CIRAD, AFZ and FAO

Feedipedia.org A programme by INRA, CIRAD, AFZ and FAO

Feedipedia.org. A programme by INRA, CIRAD, AFZ and FAO

Seaweeds are macroalgae, which generally reside in the littoral zone and can be of many different shapes, sizes, colours and composition. They include brown algae (Phaeophyceae), red algae (Rhodophyceae) and green algae (Chlorophyceae). Seaweeds have a long history of use as livestock feed. They have a highly variable composition, depending on the...

Byproduct use in ruminant feeding systems depends on their economic interest. But economic optimization is rarely used to calculate rations, while linear programming is largely applied to formulate compound feeds (Dantzig, 1966). In fact, it is difficult to meet the linear constraints when the non-additive and non-linear concepts, such as forage/co...

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Implications • Since the 1990s, the rising demand for fish products has been met by aquaculture rather than by capture fishery. • Fish meal is the main component of many fish diets due to its outstanding nutritional value. As this reliance on fish meal is under question for environmental, societal, and economic reasons, alternative feed sources are...

Common needle grass (Aristida adscensionis)

A 60-70% increase in consumption of animal products is expected by 2050. This increase in the consumption will demand enormous resources, the feed being the most challenging because of the limited availability of natural resources, ongoing climatic changes and food-feed-fuel competition. The costs of conventional feed resources such as soymeal and...

L’aviculture européenne est dépendante d’approvisionnements en soja essentiellement en provenance du Brésil. Cette matière première riche en protéines est intéressante d’un point de vue nutritionnel pour l’alimentation des volailles mais pose des problèmes importants notamment en termes de prix et de conséquences environnementales. Les matières pre...

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La gestion rationnelle des ressources alimentaires destinées aux animaux d’élevage est capitale pour répondre à la demande croissante de protéines d’origine animale et repose d’abord sur une connaissance approfondie de la valeur alimentaire de ces ressources. Des tables de composition et de valeurs alimentaires sont utilisées pour l’établissement d...

Data about the nutritional aspects of feed are systematically obtained in laboratories. Some initiatives are collecting them into large databases, but this information is highly variable, so data pre-processing is essential to ensure reliable results. The objective of this paper is to evaluate the performance of various methods regarding 2 aspects...

The information stored in animal feed databases is highly variable, in terms of both provenance and quality; therefore, data pre-processing is essential to ensure reliable results. Yet, pre-processing at best tends to be unsystematic; at worst, it may even be wholly ignored. This paper sought to develop a systematic approach to the various stages i...

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Feed databases often have missing data. Despite their potentially major effect on data analysis (e.g. as a source of biased results and loss of statistical power), database managers and nutrition researchers have paid little attention to missing data. This study evaluated various methods of handling missing data using mining outputs from a database...

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La disponibilité et les facteurs de variation de la valeur alimentaire des ressources végétales tropicales et des sous-produits de l'agroindustrie sont présentés dans cette synthèse. Les ressources alimentaires utilisées sont très variées (herbes, arbres fourragers, céréales, tubercules, coproduits de culture, sous-produits de l'agro-industrie) à l...

Availability and sources of variation in the feed value of tropical plant resources and agro-industry by-products were studied. There is a large diversity of feed resources (grass, legume, fodder trees, grains, tubers, co-culture, by-products of agro-industries) reflecting the great diversity of more or less intensified farming systems that include...

Data engineering for creating feed tables and animal models in the tropical context - Volume 1 Issue 2 - Daniel Sauvant, Gilles Tran, Valérie Heuzé, Denis Bastianelli, Harry Archimède

La valeur «phosphore» des aliments, dont la connaissance est nécessaire pour maîtriser les apports nutritionnels et les rejets dans l’environnement, est caractérisée par les teneurs en phosphore total et en phosphore phytique par l’activité phytasique endogène. Les teneurs en phosphore total varient fortement entre matières premières : de moins de...

Proper management of phosphorus nutrition and excretion requires a good knowledge of total phosphorus content, phytic phosphorus content and endogenous phytase activity of the feed ingredients. Total phosphorus content varies greatly between feed materials, from less than 1 g/kg (wheat straw) to more than 210 g/kg (some phosphates). Total phosphoru...

This book is the result of collaborative work between INRA and the Association Française de Zootechnie (AFZ). The tables in this book present the chemical composition and nutritional values of the feed materials fed to the main farm species. The feed materials included in this publication are used both in the formulation of compound feeds and as st...

2. ed. Mention d'édition : 2. ed.

The quantitative influence of dietary fat composition on methane production in dairy cows was estimated from a literature survey involving thirty-seven diets from seven papers. With this database covering a large range for animal performances and dietary lipid composition, it seems that methane production (expressed as l/kg DMI of feed) decreased w...

Energy supply represents the main cost in pig production (>50%). Therefore, it is quite important to evaluate precisely both the energy requirements of pigs and the energy value of compound feeds or ingredients. This review presents the concepts and the information used for calculating the energy value for pigs of the ingredients (n = 120) listed i...

Cet article présente la démarche adoptée pour le calcul des données de valeur énergétique, pour le porc, des matières premières (n = 120) des Tables publiées par l’INRA et l’AFZ en 2002. Elle propose également des méthodes simplifiées pour le calcul des valeurs énergétiques de produits dont la composition chimique diffère de celle rapportée dans le...

La fraction lipidique des fourrages et des aliments concentrés est généralement moins bien connue que leurs fractions glucidiques, protéiques et minérales. La teneur lipidique de ces aliments se mesure par le dosage de l’extrait éthéré selon deux procédés suivant qu’une hydrolyse à chaud est nécessaire ou non pour obtenir l’extraction la plus compl...