Combining bag cultivation and wall cultivation for oyster mushrooms multiplies yields

According to trials, using soybean stalks as the raw material and growing oyster mushrooms with a combination of bag cultivation and wall cultivation can keep the biological conversion rate steady at around 200%, and at best up to 300%. The specific method is as follows:

For preparing the culture material, select fresh, dry, mold-free soybean stalks, sun them for 2 to 3 days, and crush them with a grinder with a 1 cm screen hole diameter. The formula is: soybean stalk powder 78%, wheat straw 10%, soybean cake 5%, gypsum 1%, superphosphate 3.5%, urea 0.5%, corn flour 2%, water 130%. Mix the culture material well, pile it up for fermentation, and turn the pile 3 times.

For bagging and inoculation, spread out the fermented culture material to cool to below 30°C, put it into 25 cm x 50 cm plastic bags, filling two layers of material with 3 layers of spawn, cover the material surface at both ends of the bag mouth with spawn, inoculate 15 kg of spawn per 100 kg of dry material, and tie the bag mouth tightly.

For managing the spawn bags, 10 to 15 days after sowing, when the mycelium has already grown vigorously, use a wooden needle to poke 8 to 10 micropores to supplement the oxygen needed for mycelial growth and speed up its growth; in 20 to 25 days the mycelium can fill the spawn bag.

For preparing nutrient soil, select 65 kg of fertile garden soil, 20 kg of furnace slag (sifted), 10 kg of miscellaneous wood sawdust or straw powder, 3 kg of lime, 1.5 kg of superphosphate, and 0.5 kg of urea. First mix the first 3 main ingredients evenly, then dissolve the lime, phosphate fertilizer, and nitrogen fertilizer separately in water, and splash this onto the dry material.

For removing the bags and building the wall, 7 to 10 days after the mycelium has filled the bags, untie the seals at both ends, roll the tube film from one end toward the other to the halfway point, then arrange the two open ends opposite each other into two rows, with a 3 to 4 cm gap between the rows, fill with nutrient soil to a thickness of 1 to 2 cm above the bags, and then place a second layer of double-row spawn bags. In this way, one layer of spawn bags and one layer of soil, build up 6 to 8 layers in total, cover the topmost layer with 8 to 10 cm of soil, and shape it into a strip-style trough, planting garlic in the trough to prevent the soil from compacting.

For fruiting management, 5 to 6 days after the spawn wall is built, spray water to induce fruiting; the biological conversion rate of the first flush can be around 100%. After the first flush is harvested, apply additional nutrient solution in the trough together with irrigation, adding 1 kg of superphosphate and 0.5 kg of urea per 100 kg of water, and 4 to 5 flushes can be harvested.

For dismantling the wall and growing in beds, after 4 flushes of fruiting the spawn wall can be dismantled, then peel off the plastic film and place the end that has not fruited upright in a sunny bed, fill the gaps between the spawn logs firmly with fertile soil, irrigate heavily to soak the spawn logs through, and wait for them to fruit again. After covering with film for management, another 3 to 4 flushes can be harvested.