Abstract: The present invention relates to a method for the preservation of hay and other forages for animals and is characterized by distributing to the forages in finely dispersed form and in active amounts to block the growth of fungi and any other biological activity an agent with the ability to achieve a high osmotic pressure in the humidity of the forage. The so treated forage is then brought to storage.The agent according to the invention is a concentrated water solution of an electrolyte with high water solubility stable at actual working temperature, which does not contain elements harmful for animals or humans.