Mushroom dreg compound substrate formula for soilless culture of cucumbers

The invention discloses a mushroom dreg compound substrate formula for soilless culture of cucumbers. The mushroom dreg compound substrate formula is prepared through the following method: fermenting mushroom dregs, livestock excrement and enzyme microorganism powder according to the volume ratio as 3:1:0.1, mixing and preparing the fermented mixed fermentation, turf and perlite according to the volume ratio as 6:4:1, and filling a groove to be used. The formula fully uses mushroom dreg resource abandoned by edible mushroom factory production and livestock excrement resource, environment pollution is reduced, production cost is saved, and cucumbers cultivated in the mushroom compound substrate are better than those cultivated in soil and a traditional substrate in the aspects of growth index and fruit yield. A fruit quality index of content of protein, soluble sugar, free amino acid and the like exceeds that of soil cultivation and traditional substrate cultivation.