1, sowing time
Sowing is usually carried out from July to late September, and the best sowing date is around the summer in late August. Sowing date is early, it is difficult to raise seedlings, many dead plants after planting, low yield, spicy moss or bitter taste; Delaying sowing date leads to fewer dead seedlings, but too late will shorten the harvesting period, reduce the number of harvesting times and affect the yield.
2. Seedling management
Keep the soil moist before emergence, and in case of high temperature and dry weather after emergence, water it every evening, and pay attention to prevent aphids, yellow striped flea beetles and diamondback moths. The seedling age of very early-maturing varieties is 20-24 days. After 24 days, bolting may occur in the seedbed or before the rosette leaves grow after planting. The seedling age of medium-maturing varieties is 25 days, and full-moon seedlings are not planted. Only late-maturing varieties can plant full-moon seedlings.
3, fine soil preparation, sufficient base fertilizer.
The plot planted with red cabbage moss should also be completed 10 days before planting at the latest, so as to be exposed to the sun. Generally, plough and harrow twice, and plough and harrow once for a few days. Generally, ridge furrow irrigation should be adopted, that is, furrow should be furrowed at the rate of 1- 1.2 m (including furrow), with one furrow and two rows. The furrow of early-maturing varieties can be narrower. Apply plantar fertilizer before planting, and apply 2500 kg of high-quality farmyard manure or 100 kg of compound fertilizer every 667㎡.
4. Planting
Water the seedbed the day before planting, so as to take the seedlings. When planting, it is best to take the seedlings with soil, and if you can't take them, you should do as little damage to the roots as possible. Seedlings should not be planted too deep, so as not to cover them, and water them as they are planted. It is best to irrigate a field once after planting, but it can only be irrigated by immersion, not flooding. The narrow row of very early-maturing varieties is 35-40cm, the narrow row of early-middle-maturing varieties is 40cm, and the spacing between plants is 30-35cm.
5. Fertilizer and water management
Keep the soil moist during the whole growth period, and water it in time when the leaves are wilted. Topdressing for 4-5 times in the whole growth period, with urea 5- 10kg for 667㎡, topdressing for the second time before sealing, potassium chloride plus urea 10kg for 667㎡, topdressing for side moss and sun moss once each during harvesting.
6, pest control
The main diseases are downy mildew, soft rot, virus disease, black spot disease, clubroot, etc., and attention should be paid to kang land and crop rotation for clubroot. Insect pests mainly include striped flea beetle, aphid, cabbage moth, diamondback moth, etc. Attention should be paid to observation and timely prevention and control of pests and diseases.
7. Harvest
When the cauliflower grows to 35-40cm, 2-3 flowers bloom and a few buds turn yellow, it can be harvested. Generally, harvesting begins at the beginning of 10, twice a week in the early stage, once a week in the late stage when the temperature is low, and harvesting should be carried out in the afternoon to reduce mechanical damage.