[Effect of urea addition as a nitrogen source-non-protein to some diets of Syrian sheep on feed intake, live weight gain, digestibility rate of organic matter and crude fiber]

aliment pour animaux body measurements crude fibre digestibilidad digestibility feed intake feeds fibra bruta fibre brute mensuration corporelle organic matter ovin ovinos peso piensos poids prise alimentaire (animaux) sheep siria syria syrie urea uree weight