1Plots and selection of species to choose convenient transportation, high terrain, convenient drainage, irrigation, adequate light, the selection of varieties resistant to disease, heat, early maturing varieties: Yan Xiu, sowing after August 1, planting a large area of ​​each 7d sowing a batch, after September sowing selection: excellent cold resistance. Planting 667m2 Broccoli requires 25-30m2 seedbed. Pre-seeding 10% of seedlings for use of seedlings.
2 Sowing seedlings
2.1 Preparation of nutritious soil The substrate for seedlings should be formulated with peat, vermiculite, and perlite, and nutrient soils can be prepared in a 1:1 manner according to the matrix and soil.
2.2 Seed treatment In order to prevent seedling blight, seed dressing of 0.3%-0.5% is suitable for seed dressing and cool dry.
2.3 sowing method Choose the standard 72-point nursery tray, put the nutritious soil into the plate, and scrape the surface with a scraper, neatly placed on the nursery bed. The plate was flat and 1.5 m wide. Before sowing, it was thoroughly watered. Then the hole was pressed with a finger or a small wooden stick. The depth was 1 cm. One seed per hole was sowed on demand. The seeds were covered with 0.5-1 cm thick substrate after sowing. After nursery seeding, 2 layers of shade nets are tiled and shaded. Prepare plastic film to prevent rainstorms. After the seeds sprouted, the net was plugged into a small arch shed, and the exposed shading net was covered in a small shed.
2.4 Seedling Management Broccoli seedlings gradually adjust the thickness of the shade net after seedling emergence, increasing the light of the seedbed. Sunlight nets should be gradually removed when sunlight is not strong in the morning and evening. When the cotyledon was flattened, it was sprayed with 1500 times of Akeb to control damping-off; attention was paid to the control of yellow striped flea beetle, cabbage caterpillar and diamondback moth, and seedlings were treated with 0.1%-0.3% urea and 0.1%-0.3% phosphoric acid. Aqueous potassium hydroxide solution. 28-33 d after sowing, when the seedlings were planted with 5-6 true leaves. The hardening of seedlings should be strengthened 7 days before planting, and the shade nets should be gradually removed to adapt the seedlings to the external environment.
3 Settlement for soil preparation, combined with 1500-2000kg of chicken manure in Mushi, 40-45 kg of potassium sulfate or potassium chloride compound fertilizer, and 2-3 kg of borax. The whole sorghum with a width of 90-100 cm and a depth of 25 cm. Before transplanting Shi Tianbu 125ml-150ml/667m2 for pre-emergence weeding. 1-2d after planting. Double row cultivation, spacing 35cm. Plant 2500-3000 plants per 667m2.
4 Field Management
4.1 Top dressing After planting seedlings for 5-7 days, topdressing Miao Fei is applied. Every 667m2 topdressing urea 5 kg, after each 5-7d application 10kg urea + 10kg potassium sulfate or potassium chloride compound fertilizer. Apply 20-25kg of potassium chloride compound fertilizer per 667m2 before applying budding and apply it with soil.
4.2 Irrigation of broccoli requires more water during the entire growth process. It is necessary to keep the soil moist, especially at budding stage and bud development stage, otherwise it will cause early aging, poor development of the curd, low yield and poor quality. However, due to impatience, flood irrigation should not be flooded, irrigation should be ditch, water penetration after the ditch, the remainder of the water discharge in a timely manner. The rainy days of the growing season should be promptly drained.
5 Diseases and Insect Pests The broccoli diseases mainly include damping-off, blight, downy mildew, and broccoli head rot.
6 The timely harvest of broccoli is suitable for harvesting and must be harvested in time. Harvesting is too early, buds are not yet fully developed, and flowerballs are small. Low yield; late harvest, loose buds, yellowing, poor quality. The criteria for the timely harvesting of broccoli are: full growth of flower bulbs, neat flower buds, mushroom shape appearance, the highest quality and yield. Harvesting later may reduce quality and yield due to elongation of flowering buds and loose flower buds.
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