What are the good methods for forcing oyster mushrooms to fruit? Explained clearly in one article
In oyster mushroom cultivation, some spawn bags fail to fruit after being fully colonized, or after the first flush is harvested, the second-flush primordia are slow to appear. In both of these cases, as long as the bags are colonizing normally and the spawn's temperature type is suitable, the following measures can all bring about successful fruiting.
1. Temperature difference stimulation: raise the temperature of the mushroom shed during the day and ventilate to cool it at night, artificially widening the temperature difference to stimulate fruiting.
2. Light stimulation: after the spawn bags are fully colonized, roll up the straw curtains of the mushroom shed every day and let sunlight shine in for a period (do not expose them to direct light when the light is intense). For trenches or mushroom houses where sunlight is inconvenient, artificial light can be used.
3. Scratch stimulation: for cases where excessive addition of wheat bran, rice bran, urea or other high-nitrogen substances to the substrate causes an imbalanced carbon-to-nitrogen ratio, overgrowth of mycelium, and formation of a mycelial skin that delays fruiting, or where fruiting fails because the bags were opened too early and the surface of the bags is too dry, a small rake with claw-like nails made of iron wire can be used to gently scratch open the mycelial covering or skin; combined with ventilation and spraying a 0.5% glucose solution, supplemented by temperature difference and light stimulation, this can promote pinhead formation.
4. Casing soil and pressure stimulation: place tiles, wooden boards or bricks on the mushroom bed or spawn bags. Covering the mushroom bed with a 1-1.5 cm thick layer of soil both prevents contaminating organisms and retains moisture to force fruiting, giving a better effect.
5. Hormone and chemical stimulation: spray the surface of the spawn bags or the mushroom bed with 5 ppm-10 ppm naphthaleneacetic acid or 0.1 ppm-0.5 ppm triacontanol. This method not only advances fruiting but also increases yield.