The cultivation techniques of greenhouse broccoli in autumn and winter

First, the choice of species. Broccoli is a vegetable in a cool environment. Common varieties can be grown in greenhouses in autumn and winter. 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.

Second, nursery. The seedling age of broccoli is short (30-35 days), depending on the circumstances, it can be raised in the middle of October, and it will be listed in large quantities before the Spring Festival. Seedlings can be used for nutrition (10 cm 10 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, per acre The amount of 20 grams, sowing depth of 0.5-1 cm. After sowing, it was poured once and permeable. After 2-3 days after emergence, weeds were removed and the seedbeds were often kept moist. When the seedlings grow 1-2 true leaves, and time seedlings 1-2 times, thin and dense seedlings are removed. The bed temperature should be maintained at 20-30°C. Otherwise, if the bed temperature is too low and the seedling age is too long, small old seedlings will be produced, resulting in short stature after planting and reduced yield. If the bed temperature is too high and the temperature is too high, the leggy grows weak. Seedlings, leading to weak plant growth, reduced production. When the seedlings grow to 5-7 true leaves (about 30-35 days), fertilizer control, water control, ventilation and humidity are conducted, and the seedlings are planted for 3-5 days to improve the survival rate of transplanting.

Third, colonization. Before planting, 4 tons of quality farmhouse manure, 15 kilograms of ammonium phosphate, 10 kilograms of ammonium nitrate were mixed tillage, fine leveling, and ridges were planted with a width of 70 cm and a width of 50 cm. The ridge width was 70 cm. 50 cm wide, covered with 90 cm ridge film, plant spacing 40 cm, 2750 acres of seedlings. After the planting, the fertilizer and water were attacked in order to give priority to the promotion. The temperature was maintained at 8-24°C to promote plant growth and increase leaf area as soon as possible. About 10 days or so, with water after the application of ammonium nitrate 15 kg; after the top of the ball appeared after the application of ammonium nitrate 6 kg. After the bulbs are maintained at 15-18°C, less than 8°C, the bulbs grow slowly, are larger than 24°C, and the bulbs are loose. The temperature during the whole plant growth period should not exceed 32°C.

Fourth, harvest. When the flower bulb grows to 400-600 grams, diameter 12-18 cm, dark green color, tight ball, not loose when you can harvest. If picking is too early, the yield will be low and the quality will decline; if it is too late, the moss will blossom and lose its value.

Fifth, pest and disease control. (1) Bacterial damping-off: Use 0.2% of 40% seed dressing, double powder dressing or soil treatment. If necessary, spray 25% WP wettable powder, 0.2-0.3% 75% chlorothalonil wettable powder or 70% mancozeb powder. (2) Downy mildew: After the central strain was found, it was sprayed with 72% Kelu wettable powder 800 times and 58% metalaxyl MnZn wettable powder 500 times. Those who have developed drug resistance can switch to 69% ank manganese zinc 1000 times and stop using the drug 7 days before harvesting. (3) Soft rot: Avoid continuous cropping with Solanaceae, melons and other cruciferous vegetable crops. Under-membrane irrigation, pest control, reduce wounds. Use NR 751 to seed 1-1.5% of the seed amount and spray with streptomycin sulphate or 72% of streptomycin-soluble powder 3000-4000 times, spray once every 10 days, and spray 2-3 times. The drug was stopped 3 days before harvest. (4) Pieris rapae and aphids: Control of cabbage caterpillars and aphids with 50% anti-inflavored WP 2000x and 25% oxaranthrin 1000x. During the whole reproductive period, medication should be taken 2-3 times, and the time interval for each medication should not be less than 7 days. The drug was stopped 7 days before harvest.

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Appearance

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Model Number

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Country of Origin

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Package

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Storage

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