l. Variety selection Broccoli is a kind of vegetable that prefers cold, and the general variety can be cultivated in autumn and winter in a greenhouse. However, in order to increase economic efficiency, attention should be paid to the combination of early, late and late maturing varieties, and the varieties with strong plant growth, dark green leaves, waxy wax, dense flower buds, small buds, and large balls should be selected. According to the experiment: Oriental Green, jade crown, green, green is early maturing varieties, green ridge, green show, Oriental green ash is a late-maturing varieties, and both in the greenhouse in autumn and winter cultivation. 2. Nursery Broccoli has a short seedling age (30 to 35 days) and can be raised in the middle or late October depending on the circumstances. Seedlings can be used for nutrition (10 cm l0 cm) or nutrition grid method (8 cm 8 cm), nutrient soil configuration with 8 fertile pastoral soil plus 2 fully decomposed chicken manure or sheep manure, double grain on demand, mu species The amount of 20 grams, sowing depth of 0.5 to 1 cm. After sowing, water once permeated, 2-3 days after the emergence of weeds, the seedbed should always be kept moist, when 1 to 2 true leaves and time seedlings 1 to 2 times, remove thin and dense seedlings. The bed temperature is maintained at 20-30°C. Conversely, if the bed temperature is too low and the seedling age is too long, it will cause small old seedlings, which will result in short stature and reduced yield after planting. If the temperature of the bed is too high and the temperature is too high, then the weak seedlings will be formed in a leggy manner, resulting in weak plant growth and reduced yield. When the seedlings grow to 5 to 7 true leaves for about 30 to 35 days, fertilizer control, water control, ventilation and dehumidification, and hardening of the seedlings for 3 to 5 days are performed to increase the survival rate of transplanting. 3. Colonization Before planting, 4,000 kg of high-quality farmhouse manure, 15 kg of diammonium, and 10 kg of ammonium nitrate were mixed tillage and fine leveling. The ridging was planted with a width of 70 cm and a width of 50 cm, ie a ridge width of 70 cm and a width of 50 cm. In centimeters, the ridge covers 90 centimeters of plastic film, with a spacing of 40 centimeters, and 2,750 mu of seedlings. After the planting, the fertilizer and water were attacked in order to give priority to the promotion. The temperature was kept at 8-24°C to promote plant growth and increase leaf area as soon as possible. About 10 days, with watering topdressing ammonium nitrate 15 kilograms, after the top of the ball appeared after the application of ammonium nitrate 6 kilograms, significantly after the bulb temperature remained at 15 ~ 18 °C, less than 8 °C, the flower bulbs grow slowly, greater than 24 °C, loose flower bulbs, the whole plant growth temperature should not exceed 32 °C. 4. Harvesting When the flower bulb grows to 0.4-0.6 kg, the diameter is 12-18 cm, and the color is dark green and the flower ball is tight and not loose, it can be harvested. On the contrary, if the harvesting is too early, the yield will be low and the quality will decline. If it is too late, the bolting will bloom and the food value will be lost. 5. Pest Control. Seedling damping-off. Use 0.2% of 40% seed dressing, double powder dressing or soil treatment, if necessary, spray 25% wet fungal wettable powder, 0.2% to 0.3% 75% chlorothalonil WP or 70% dexamethasone Manganese zinc powder seed dressing. Downy mildew. After the discovery of the central disease strain, it began to spray 72% of Kelu wettable powder 800 times, 58% metalaxyl MnZn wettable powder 500 times, to produce 69% of the drug resistance can be used instead of 1000 times , Stop the medication 7 days before harvest. Soft rot. Avoid joint production with solanaceous melons and other cruciferous vegetables. Under-membrane irrigation is used to prevent pests from reducing wounds. Use agricultural anti-751 seed dressing according to the l% ~ 1.5%, spraying streptomycin sulfate, every 10 days 1 time, continuous defense 2 to 3 times, 3 days before harvest stop medication. Pieris and locusts. 50% of Kangweiwei WP 2000 times solution and 25% oxychroma lipid 1000 times solution spray insecticide, 2~3 times of the whole growth period, and the time interval between two drugs should not be less than 7 days. The drug was stopped 7 days before harvest. Rain boots also named Wellington boot or gumboots. It has
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