Salah Nizar

French National Institute for Agriculture, Food, and Environment (INRAE) | INRAE

The study evaluated the dose effect of a dietary supplementation with yeast probiotic Saccharomyces cerevisiae (CNCM I-4407, 1010 CFU/g, Actisaf Sc47; Phileo by Lesaffre, France) on production, energy metabolism and reproduction in lactating dairy cows. 117 multiparous Holstein cows from 3 to 60 days in milk held in a barn with automatic milking sy...

The goal of calf feeding systems is to provide calves with optimum nutrition to promote growth, health, and future milk production and to reduce antibiotic use which leads to a need for alternatives that reduce illness and promote growth in dairy calves. We hypothesized that feeding live yeast would improve gastrointestinal health and growth perfor...

The administration of yeast products as feed additives has been proven to beneficially affect animal productivity through energy, oxidative, and immune status improvement. This study evaluated a combination of Saccharomyces cerevisiae live yeast (LY) with yeast postbiotics (rich in mannan-oligosaccharides (MOS) and beta-glucans) and selenium (Se)-e...

The objective of this study was to evaluate the use of a faeces sieving tool "Digescan" as an indicator of feed valorization, and to test the influence of feeding strategy on fecal particle size (PS) distribution and weight, milk performance and the possible association between them. Data from 95 trials were used. During each trial, two periods wer...

Guide d'utilisation de la banane et ses coproduits dans la nutrition animale

The overall aim of the thesis project was to generate knowledge to contribute to the development of good feeding practices for sheep goats and cattle in warm regions. The methodology used in this project crossed meta-analysis to an experimental approach. The maintenance energy requirements of goats, sheep and cattle in warm regions are higher than...

L’objectif général du projet de thèse était de produire des connaissances pour contribuer au développement de bonnes pratiques d’alimentation des caprins, ovins et bovins des régions chaudes. La méthodologie utilisée dans ce projet a croisé des méta-analyses à une approche expérimentale. Les besoins énergétiques d’entretien des caprins,ovins et bov...

The aim of this work was to establish the response of growing sheep, goats and cattle to different nutritional environments. Data from 590 publications representing 2225 treatments were analysed. The results showed that each 10% increase in NDF was accompanied by 0.11 g/kg live weight (LW) and 0.32 g/kg metabolic live weight (LW0.75) decreases in D...

The objective of the study was to update energy and protein requirements of growing sheep, goats and cattle in warm areas through a meta-analysis study of 590 publications. Requirements were expressed on metabolic live weight (MLW=LW0.75) and LW1 basis. The maintenance requirements for energy were 542.64 and 631.26 kJ ME/kg LW0.75 for small ruminan...

Until now, feeding recommendations for livestock in tropical and warm areas are largely based on standards produced in temperate area (ARC, 1984; INRA, 1989; NRC, 1985). Nevertheless, energy and protein requirements of livestock in warm area could differ from those of temperate area. The objective of this study was to estimate energy and protein re...

This study was designed to find the effect of incorporation of faba bean in barley-based concentrate diet on milk yield and lamb growth. Thirty Sicilo-Sarde dairy ewes belonging to the flock of the National Land Office in Ghézala-Mateur (Tunisia) were divided into two homogeneous groups of fifteen animals of matching lambing body weight, lactation...

Rapid measurements of milk properties and discrimination of milk origin are necessary techniques for quality control of milk products. The present study was undertaken to evaluate the potential of using front face fluorescence spectroscopy (FFFS) and synchronous fluorescence spectroscopy (SFS) for monitoring the quality of forty-five ewe’s milk sam...

Under current international economic conditions, the search for alternatives to feed animals is crucial. The replacement of soybean meal (imported protein source) by broad bean «Vicia faba L.» meal (local protein source) in the formulation of concentrates for dairy sheep constitutes a solution that should be studied. The present study evaluated mic...