How to grow celery in Wenzhou on rainy days
Growing habits:
Celery has a cool and humid climate and belongs to semi-cold-tolerant vegetables. Not resistant to high temperature.
Drying can withstand a short-term low temperature below zero.
The lowest temperature of seed germination is 4℃, and the optimum temperature is 15 ~ 20℃. The germination is delayed below 15℃, and hardly germinates above 30℃.
The seedlings can tolerate the low temperature of -5 ~-7℃ and belong to green vernalization plants. The seedlings with 3 ~ 4 leaves go through the vernalization period of 10 ~ 30 days at 2 ~ 10℃.
Celery has poor cold resistance and seedlings are not frost-tolerant. The suitable temperature for vernalization is 12 ~ 13℃.
Planting season:
Celery is cultivated in the open field in North China, and the climate suitable for celery growth is the longest in autumn, so the yield, quality and cultivation area are also the largest.
Celery can also be planted in various protected areas to achieve annual supply.
Generally, 65438 is planted in greenhouse in spring+0 ~ February, planted in late March ~ mid-April, harvested in late May ~ July, planted in autumn, planted in mid-June ~ early July, planted in spring in early August ~ mid-September, and harvested in June+08 ~ 65438+February.
Generally speaking, protected cultivation is mostly planted in early July, mid-July to early August, planted in improved greenhouse or solar greenhouse in September ~165438+1October, and harvested in June ~ March.
Cultivation techniques:
Celery is difficult to emerge, so sandy loam with high terrain, convenient irrigation and drainage, loose soil and fertile soil should be chosen as seedbed.
It is necessary to apply sufficient decomposed base fertilizer and more ring fertilizer to loosen the soil.
In order to achieve rapid, complete and uniform emergence, seeds can be soaked 7 ~ 8 days before sowing to accelerate germination.
Sowing in the middle and late June, first soak the seeds in 12 ~ 14℃ cold water for 12 ~ 24 hours, clean the seeds, air-dry them in the shade for a while, wrap them with a wet towel when the surface of the seeds is dry, and put them in the shade (15 ~ 20℃).
Seeds can be sown when they are bare, and wet sowing method is often used, that is, the bottom water is poured first and then mixed with sand for sowing. Build a shade shed on the seedbed to cool down, prevent sun and prevent heavy rain.
After sowing, the mulch should be thin and uniform, and the seedbed should be kept moist. Generally, a small amount of water is poured every 1 ~ 2 days in the morning and evening until the seedlings sprout together. Spring and autumn sowing can be done without shade shed, and small water should be poured frequently to facilitate seedling emergence.
In order to reduce the harm of weeds, 0.75 ~ 1 kg/mu of 25% wettable herbicide ether and 80 ~ 100 kg of water can be sprayed evenly on the border before emergence.
Seedlings should be planted with two leaves at a time, and the spacing between seedlings should be 1cm. When the number of seedlings is 3 ~ 4, divide the seedlings at one time, and the seedling spacing is 8 ~ 10 cm square. After the seedlings survive, intertillage should be carried out to promote the differentiation of roots and leaves of seedlings. Urea can be topdressing 10Kg/ mu, and the plastic film is completely removed, which is convenient for seedling exercise.
When the seedlings grow to 5 ~ 7 pieces and the height of the seedlings is 15 ~ 18 cm, they can be planted. Pay attention to the prevention and control of aphids, leaf blight and other hazards.