If there are no artificially domesticated seedlings, you can collect the seed roots in the area where the celery grows densely. In late September, before the occurrence of heavy frost, otherwise some stems and leaves on the ground will be killed by frost after heavy frost, and no seedlings can be found and no roots can be dug. When harvesting roots, remove the dead stems and leaves on the ground, dig out the roots with a pick, and don't destroy the growing points. After collection, take it back to the greenhouse and prepare for transplanting. When stored, they should not be damaged by heat or water loss.
(2) Soil preparation and fertilization: from the end of 10 to the beginning of10, clean the greenhouse, apply 3000 kg of farm manure per mu (leave 1000 kg), spread the rest in the ground, then turn over the ground, rake it flat, make a bed and make a concave trough bed. 1.5m, the bed length depends on the greenhouse span, and the aisle width between beds is 10? 15cm, screen more hillside soil for covering soil.
(3) Transplanting: Before cultivation, water is poured on the soles of feet (the temperature of 5 cm soil layer is saturated), and after a little drying, it is pressed at 400? Every square meter. 500 seedlings (roots) are evenly placed in the seedbed to produce commercial celery (in a greenhouse with a length of 50 meters and a width of 7 meters, the number of cultivated celery is 654.38+ 10,000? 1.20 thousand seedlings), the above method is to place seedlings (roots) evenly, and the growth point of each seedling is upward. The second method is to ditch and plant in strips, with the row spacing of 5 cm and the plant spacing of 3 cm, and put the seedlings for transplanting. In the second method, plant first and then water the bottom layer. No matter which cultivation method is adopted, it is appropriate to cover the screened hillside soil with a thickness of 2 cm after planting. After covering the soil, water is poured once with a watering can, and the partially exposed roots are covered with soil.
(4) Field management: Pay attention to water and temperature management after sowing and before emergence. The water content depends on the soil humidity, and the bed soil humidity should reach 65%? 75%, the temperature is controlled at 25? 30℃, the lowest can't be lower than 5℃. High temperature before emergence can shorten the emergence time, and the suitable temperature after emergence is 18? 22℃, the highest can't exceed 25℃, and the lowest can't be lower than 5℃. If the temperature is too high, the stems and leaves will easily age, and if the temperature is too low, the growth rate will be affected. Below 5℃, the growth of celery basically stopped.
According to the requirement of light, celery growth does not need strong light. Therefore, after the emergence of seedlings, the sunshade net should be hung under the greenhouse film to avoid strong light and create a suitable production environment.
Weed in time and manually weed in time according to the growth of weeds in the field.
(5) Harvesting: The main criterion for harvesting is that the stems and leaves are fresh and tender. When the plants grow to 15? When it grows to 20 cm, it can be harvested and marketed. When harvesting, you can cut the plants that meet the standard from the surface with a sickle, grade them according to the length of the plants, and use a small handle (0.5? 1.0kg) and put it on the market. Attention should be paid to heat preservation during transportation to avoid frostbite and affect the quality.
Harvest period: 65438+From the end of February to the end of April of the following year, wild celery can be listed. Can winter production yield 2? 3 crops, the output per square meter can reach 2? Three kilos.
Root cultivation and fertilization
At the end of April, during the harvest period, the aboveground parts of celery cultivated in greenhouse were cleaned, and 3000 kilograms of decomposed farmyard manure was applied to each mu, and the bed surface was paved to supplement soil moisture and let it germinate. At this time, the temperature, humidity and illumination are all managed according to the above standards. After the final frost period, remove the shed film, leave the sunshade net and remove weeds regularly. From late August to mid-September, seeds should be harvested in time and collected at maturity.
In order to make full use of greenhouse and improve economic benefits, kidney beans or small fruit tomatoes can be planted at the end of celery harvest.
American antelope, pear, persimmon and cherry tomato can be used to cultivate high-fruit tomatoes with tall fruits and strong disease resistance. Raise seedlings early, raise seedlings at the end of February1end of October-early February, and cultivate celery at the end of harvest period. In each bedside, there is a row with a spacing of 40 cm, and in the front corner of the greenhouse, there is a row with the same spacing. The plant height can reach 3 meters, and the yield per mu is more than 2,500 Jin, which can obtain certain benefits, and more importantly, it can play a shading role in raising roots and fertilizing celery.
165438+1in the middle of October, all the litter on the ground in the greenhouse will be removed, 3000 kg of farm manure will be applied, and plastic film will be buckled for winter production. The method is as above.
Asexual propagation of seedlings
1 tissue culture
If conditions permit, biotechnology can be used for tissue culture and seedling breeding, but this method can not be implemented by farmers at present.
2. Seed root breeding
From mid-late April to early May, the roots, stems and leaves of wild celery can be collected and cultivated in the open field. The method is basically the same as that of greenhouse cultivation in winter, but the cultivation density is thinner, with 45,000 plants per mu? 55,000 plants, with a row spacing of 20 cm and a spacing of 6? 7 cm, make the bed, furrow and transplant, and the management method is the same as above. This cultivation method can achieve the purpose of cultivating seedlings. First, some seeds can be harvested that year, and seedlings can be propagated sexually in the second year. Second, after a year of cultivation, new roots can be regenerated. Before freezing, the seed roots can be taken out and put into the solar greenhouse for winter production. If winter production is not carried out, plastic sheets will be buckled in early spring and early March of the following year, and production will be carried out in greenhouses or small arch sheds, and the first half of April will be fine. Normal management of later uncovering.
Seed propagation can also be carried out in a solar greenhouse. Seedling was raised in a small hole nutrition pot in the greenhouse in the middle and late March, emerged in the middle and early April, and fully developed in the late April. After the last frost period in late May, the seedlings were transplanted to open fields for planting. The method is the same as planting in the open field.