Key points of planting techniques of Pleurotus ostreatus in greenhouse

I. Specifications of greenhouse: 20 meters long and 12 meters wide, covering an area of 1.2 mu (including mixing yard, living room, road, etc.), 8 bamboo racks are built inside, and the planting area is 1000 square meters. 2. Culture medium formula (1000 square meters): straw 22500 kg, cow dung 3000 kg, vegetable cake 1000 kg, compound fertilizer 400 kg, urea 100 kg, ammonium hydrogen phosphate 150 kg, calcium superphosphate 500 kg, gypsum 500 kg, lime 250 kg, carbon nitrogen ratio 31.8: 1. 3. Planting time: August to April of the next year. Strain: AS2796, 1.2 bottles per square meter (500 ml). 5. Fermentation: 1. First fermentation. (1) weighing cake, dried cow dung, urea, gypsum powder and calcium superphosphate according to proportion 2 days in advance, mixing well, pre-wetting and stacking, and covering with plastic film for standby;(2) shaking rice straw and pre-wetting for 24 hours;(3) building pile: a layer of rice straw (5~6 inches) and a layer of manure (spread), totaling 9 layers, watering each layer properly, and finally a small amount of water flowing out from the bottom;(4) turning pile: turning for the first time 5~6 days after building pile, adding ammonium bicarbonate, and turning it once in the next 4 days, totally 3 times. Lime is added in the second and third turning, about 15 days, the temperature of the material is stable at 50~60℃, and the material is transferred into the mushroom shed after 2 days. Second fermentation. The upper layer and the lower two layers do not discharge materials. 7~8 coal stoves are put into each greenhouse, the greenhouse is tightly closed, the temperature is raised to 60 DEG C, and the temperature is kept for 8 hours; the fire is reduced, the temperature is controlled at 48~52 DEG C, and the temperature is kept for 4 days; the four corners are opened for ventilation for 10~20 minutes every day during the temperature control stage. VI. Disinfection. Before planting, thoroughly disinfect the inside and outside bedstead of mushroom shed with lime water and dichlorvos, remove impurities on the ground and sprinkle a layer of lime. VII. Sowing. After fermentation, when the material has no ammonia smell, sow again. Firstly, spray mushroom shed with 0.1% solution of Clomyl and 40% dichlorvos 1000 times; secondly, ventilate and cool down, open vent hole and door, and control temperature below 28 DEG C; thirdly, assist material evenly; fourthly, adjust water content to 60%, break strain fine and spread evenly. 3 days after sowing, close the mushroom shed, keep warm and keep moisture, 5 days to before covering soil, mainly control temperature, control temperature at about 25℃, cover soil when mycelium grows through the material layer. Cover material. 24 tons of pond mud, 6000 jin of chaff added (volume ratio 1:1), the pond mud added with chlorpheniramine and lime stirred evenly, the chaff pre-wet sprayed with dichlorvos and lime, closed with plastic film for 2 days, the mud and chaff mixed evenly before soil covering, the moisture content is 20 - 22%, and the uniform mud covering thickness is 3.5 cm. When the mud dried hyphae grow out of mud cracks covered with treated small particles of loess 1 cm. 8. fruiting management. Cover the soil for about 15~18 days, keep the temperature of the shed at 20~25℃, keep the air humidity at about 80%, and spray water on the cover layer. When the temperature drops below 18℃, spray mushroom water, requiring light and uniform spray of 3 jin water per square meter. When mushroom bud soybean size, spray mushroom water, light spray, spray nozzle upward 45 degrees oblique spray. When the grape is large, increase the amount of water spray, maintain the air humidity at 85~90%, and ventilate when spraying water. IX. Harvest. Harvest mushrooms before they open.