A preliminary study on selenium content of forages and local by-products in the Tadla area (Morocco) in connection with ovine nutritional myopathy

contenido mineral deficiencia de oligoelementos enfermedades musculares forraje grosero forraje verde fourrage grossier fourrage vert green feed maroc marruecos mineral content morocco muscular diseases myopathie ovin ovinos roughage selenio selenium sheep trace element deficiencies