For the cultivation of broccoli, fields that have good drainage and irrigation conditions and whose previous crops are not Brassicaceae (cabbage, cabbage, cauliflower, radish) should be used as nursery and transplanting sites. Seedling cultivation should be carried out in a well-ventilated, well-ventilated, well-drained, shaded and rain-proof facility. After seeding, the seedbed should be covered with mulch in time to protect the mulch, covered with a sunshade net to cool the film, covered with a top film, and covered with a sunshade net. The temperature in the shed is controlled at about 25 ° C.
Before reasonable dense planting, apply 5,000 to 10,000 kg of rotten organic fertilizer, 50 kg of high-concentration compound fertilizer, and 0.8 kg of boron fertilizer. Then ploughing and digging, using double ridges with high ridges, ridge width of 1 meter, plant spacing of 40 cm, planting 2700-3000 plants per mu. Immediately after planting, water the roots. Broccoli loves fertilizer, and timely fertilization and watering in stages are the key to high quality and high yield. The principle of fertilization is as follows: lightly apply seedling fertilizer, apply sufficient fertilizer to grow trees, and apply bulky fertilizer. Under the premise of applying sufficient base fertilizer, topdressing in 3 times, that is, raising seedling fertilizer once every 7 to 10 days after planting, applying 5 kg of urea per acre and 100 kg of thin rotten cooked manure. 10 to 12 pieces of fertilizer should be applied, 15 kg of urea per acre, plus 10 kg of high-concentration compound fertilizer. At the budding stage, when the flower buds are about the size of a ping-pong ball, top up with fertilizer and apply 5 kg of urea per mu.
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