Selenium-enriched rice seedling raising cultivation soil and preparation method thereof

The invention discloses selenium-enriched rice seedling raising cultivation soil and a preparation method thereof and belongs to the technical field of production of food crops. The rice seedling raising cultivation soil comprises the following raw materials: aged agaricus bisporus leftovers, annual agaricus bisporus leftovers, needle mushroom leftovers, carbonized bran coat or plant ash, perlite,silica, a composite fertilizer, a synergist, a dwarfing agent, compound amino acids, selenium ore powder, sodium selenite, a traditional Chinese medicine disease resistance agent, water, an additiveA, an additive B and an additive C. The preparation method comprises the following steps: fermenting organic materials, and mixing the fermented materials and other raw materials, thereby obtaining the cultivation soil with the granularity of 0.1-0.2cm, the moisture content of less than or equal to 55% and the pH value of 5.5-7. The seedlings cultivated by the cultivation soil disclosed by the invention are high in disease