What are the key points of vegetable planting techniques in March?

The grasslands blown by the spring breeze in March are beginning to turn green, and it is the sowing season, with the traditional "sting" and "the Spring Equinox" solar terms. So, what are the key points of vegetable planting techniques in March?

I. Seedling and planting

Early-maturing cucumber and wax gourd finished sowing and raising seedlings in the first ten days of this month. Tomatoes, spicy (sweet) peppers, eggplant, cucumbers, Japanese pumpkins, watermelons, cowpeas, seasonal beans, spring radishes and other small arch shed sowing seedlings this month. Vegetable edamame bean sowing this month, especially precocious edamame bean at the beginning of the month small arch shed with plastic film double film cover direct seeding. Cucumber, watermelon, pumpkin, towel gourd, balsam pear, winter gourd, four-season beans and other varieties can be sown and raised in the open field this month. Shepherd's purse, chrysanthemum, coriander, rape and other leafy vegetables continue to sow. If the leek is propagated with seeds, it shall be sown in the last ten days. If it is propagated by ramet, it can be planted in the latter ten days. Spring cucumbers in the greenhouse can be planted in the last and middle days. Slow May, flat-headed spring cabbage, late spring lettuce, spring cauliflower and so on can continue to be planted. Greenhouse watermelons and so on began to plant quickly this month. Strawberry seedlings were cultivated in special nursery land, and female parent seedlings were planted this month.

II. Vegetable management in greenhouse

1. Temperature and humidity control

For eggplant-based greenhouse vegetables, in sunny days, it is necessary to open the door early or curl the shed film for ventilation in the morning. On cloudy and rainy days, the south door can be opened for ventilation to reduce the humidity in the shed. Cover the film and keep warm after 5: 00 p.m. Care should be taken to prevent cold air from blowing directly into the shed when ventilating. Strawberries in greenhouse can remove two layers of intima to enhance ventilation.

2. Protect flowers and fruits

Eggplant fruit vegetables can use anti-falling element to spot flowers or spray inflorescences, but be careful not to spray repeatedly and avoid spraying leaves as far as possible. Melon crops can be applied to flower stalks, ovaries or spray flowers with plant growth regulators such as zigualing. As the temperature increases, the concentration of plant growth regulators decreases accordingly. Watermelon, melon, pumpkin, bottle gourd and so on can be pollinated artificially.

3. Topdressing

After the fruit or the beginning of harvest, it is necessary to apply fertilizer properly and apply thin fertilizer frequently, applying 1015kg of ternary compound fertilizer or 5kg of urea per mu. It can also be foliar sprayed with 0.2% potassium dihydrogen phosphate for extra-root topdressing. Promote carbon dioxide fertilization, increase the concentration of carbon dioxide in greenhouse, improve the utilization rate of photosynthesis, promote plant growth and development, and improve yield and quality.

5. Pest control

This month is prone to gray mold, leaf mold, Sclerotinia sclerotiorum, downy mildew, bacterial venereal diseases and other diseases. Field management should be strengthened, weather forecast should be paid attention to, cold prevention, heat preservation, ventilation and humidity reduction should be done well. Choose corresponding pesticides, use as few emulsions as possible, and use more aerosols and powders.

III. Management of vegetables in open field

Mainly do a good job in cultivation and management, ditch cleaning and drainage, topdressing, pest control and other work. Vegetables that can be harvested should be harvested and put on the market in time.

In addition, cold-loving vegetables can be grown in the north in March: Chinese cabbage, white radish, carrots, potatoes, spinach, cauliflower, broccoli, onion, lettuce, purple cabbage, celery, Chinese cabbage, Shanghai green, coriander, leek, onion, chrysanthemum and so on; fast-ripening cold-loving vegetables can be grown in the south: spinach, lettuce, Chinese cabbage, Shanghai green, chrysanthemum and so on.