The broccoli is suitable for growing in a cool climate and can only be cultivated in autumn and winter. The selection of the field is to choose a field with good irrigation and drainage conditions and the former is not a field of cruciferous (Chinese cabbage, cabbage, cauliflower, radish) as a nursery and transplanting ground. Seedlings should be nursed in greenhouses with ventilation, drainage, shading and rain protection. After sowing, the seedling bed is covered with mulch film in time, the film is covered with a sunshade net to cool down, the shed is covered with a top film, and the top film is covered with a sunshade net. The temperature inside the shed is controlled at about 25 °C.
Apply sufficient fertilizer to the base fertilizer before planting and planting 100-200 tons of organic fertilizer per mu, 50 kg of high-concentration compound fertilizer and 0.8 kg of boron fertilizer. Then ploughing and turning, using high ridges and double rows, the ridge surface is 1 meter wide, the plant spacing is about 40 centimeters, and the planting is 2700-3000 plants. Immediately after planting, water the roots.
Field management of western blue flowers like fertilizer water, timely filling and watering, watering is the key to high quality and high yield. In principle, fertilization is “light application of seedling fertilizer, application of foot fertilizer, and skillful application of large fertilizerâ€. Under the premise of applying the base fertilizer, it should be applied in three times, that is, after 7 to 10 days after planting, the seedling fertilizer should be picked up once, and 5 kg of urea per acre and 100 kg of lean manure and excrement should be applied. When 10 to 12 tablets are applied, the fertilizer is applied, 15 kg of urea per acre, plus 10 kg of high-concentration compound fertilizer. During the bud period, when the flower buds have the size of table tennis, the fertilizer is applied, and 5 kg of urea per acre is applied.
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Magnetic Bead Nucleic Acid Extraction Reagent
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