Planting and management techniques of celery

Celery is a variety introduced from abroad, has been widely cultivated and loved by the people, and common celery has the same nutritional value. The following small series introduces the cultivation and management techniques of celery.

1. Seed soaking and germination

When celery is sown in high temperature season, seeds should be treated at low temperature first. Soak in clean water for 12~16 hours, wash and wrap with wet gauze or towel to moisturize = germination; when most of the seeds are white, they can be taken out for sowing.

II. Sowing

Choose fields with convenient irrigation and drainage, loose and fertile soil as seedbeds, prepare nutritious soil before sowing, high temperature and heavy rain in summer in the middle and lower reaches of the Yangtze River, it is best to adopt rainproof shade shed for seedling, that is, cover a layer of black shade net on the greenhouse covered with top film, so as to provide shade and rainproof.

III. Planting

When the seedlings grow to 5 - 7 true leaves, they are ready for planting. It takes about 30 days from seedling division to transplanting. About 7 days before transplanting, fertilizer and water should be controlled to strengthen seedlings and strengthen roots, so as to improve the stress resistance of seedlings. Drench the seedbed with water one day before planting, and plant with seedling. When planting, healthy and disease-free seedlings with uniform size shall be selected, and weak and diseased seedlings shall be eliminated. Planting spacing 30~40cm, plant spacing 20~30cm, single plant planting, 667 square meters planting 4500~8000 plants; spring cultivation growth period is short, in order to improve yield, can also be implemented double plant planting.

III. Water and fertilizer management

Celery like fertilizer and fertilizer tolerance, high requirements for fertilizer and water conditions, the requirements of adequate base fertilizer, base fertilizer amount should account for about 80% of the total amount of fertilizer. 4000~6000kg of decomposed manure, 30~50kg of calcium superphosphate and 25kg of special compound fertilizer containing manganese and boron are applied to the square meter of ribs. The planting land should be ploughed and sunned, and then ploughed and harrowed after fertilization. Celery grows for four months. It grows slowly in the first 2 months and rapidly in the second 2 months. In the early stage, quick-acting nitrogen fertilizer should be applied mainly, and it can be seen that the plant grows once every 7~10 days. In the middle and late stage, besides nitrogen fertilizer, phosphorus and potassium fertilizer should be added. In addition, attention should be paid to the supply of calcium and boron elements, generally 667 square meters of borax 500~700g.

IV. Harvesting

Autumn open field cultivation should be harvested before frost; spring cultivation should be harvested before bolting; greenhouse cultivation should be harvested when the heart leaves have fully developed and the outermost leaves have just appeared signs of senescence. After stripping old leaves, the net weight of celery per plant is generally 0.5~1kg, and the yield of 667 square meters is 3000~5000kg.