Celery is an alias of western celery, celery, etc. Its petiole is soft, crisp, sweet and rich in vitamins and mineral salts. In recent years, the cultivated area in North China has been increasing. The specific cultivation techniques are described below. Cultivation season: Celery prefers a cool and mild climate. It is not tolerant of high temperatures, and the optimal temperature for growth is 15 to 25°C. High temperature growth above 26°C is impeded, quality deteriorates, and diseases are easily caused. The suitable sowing date for autumn celery is in late June, and the suitable sowing date for late autumn celery is in late July. Cultivate strong seedlings: Seed treatment. Seeds 7 to 10 days before sowing deal with. The seeds were soaked in cold water for 24 hours and then washed several times. The seeds were removed and allowed to dry on the mat. After the seed surface water is lost, it is wrapped or placed in a pot, covered, placed at 15 ~ 20 °C at the germination, during the germination period, the seed bag is flipped once every day, the seeds are washed once every two days. After 6 to 7 days, most of the seeds are white and ready for sowing. Nursery preparation. The celery is small in size, weak in the top soil, and has a slow emergence. Therefore, strict requirements are placed on the seedbed and sowing techniques. The seedbed should be selected as a nursery bed with a slightly higher topography, loose soil, irrigation and drainage, and fertile soil. Each mused seedbed was sterilized with 5,000 kg of organic fertilizer, and the seedlings were made from a 1.2-meter-wide seedbed. At the time of flat boring, a part of the bauxite is removed and sieved to prepare for earth covering. sowing. Before pouring sowing water, add germination seeds with a small amount of fine soil, and sow seeds evenly after seeping. Spread the soil evenly after sowing, with a thickness of 0.5 to 1 cm. One to 1.25 kilograms of seeds are planted per acre seedbed and the nursery can be planted in 1/3 hectares. Management after sowing. After sowing, cover with a straw or wheat straw on the cocoons, and the cover should not be in direct contact with the cocoon. The role of the cover is to cool the shade, prevent rain and rain. After the emergence, the grass curtains will be opened every morning and evening so that they will see the light. After noon, they will be covered with shading. After 10 days, they will no longer be covered. Covered with wheat straw, part of wheat straw was withdrawn after 2 to 3 days from seedling emergence and evacuated in 3 to 4 batches. Before sowing, the plots that had not been treated with herbicides were sown with 25% herbicidal ether 300 times liquid and 70-100 kg per mu. The first true leaf time seedlings, seedlings from 1.5 to 2 cm. The second time when the second true leaves for the seedlings, seedlings from 2 to 3 cm. When the seedlings were watered with a small amount of water, 4 to 5 leaves of seedlings were topdressed with 10 to 15 kg of ammonium sulfate, and the number of waterings was reduced thereafter. Planting and field management: Timely colonization. The autumn cultivation was planted in early August and the late autumn cultivation was planted in late August. Land preparation before planting. Applying base fertilizer before planting, 5,000 kg of organic fertilizer per acre, deep plowing, smoothing, and fine grinding. Planting methods. Before the colonization, the seedlings were lifted from the nursery and planted according to the size of the plant. The depth of the colonization was based on the buried root system. Qiuyan planting, planting row spacing is 20 cm square, autumn delay planting 25 to 30 cm square. Management after planting. After planting, the planting water shall be poured, and after a few days, the seedlings shall be sown and the seedling water shall be slowly poured. Repeated cultivating requires deep tillage, ploughing and cultivating. Afterwards, it is not watered when the drought is obvious. When the leaves grow upright, it indicates that the celery enters a period of rapid growth, and 20 to 30 kg of compound fertilizer should be applied to every 667 m2, and then water should be poured every 5 to 6 days. Pest Control: The main diseases of celery are blight, leaf spot, spot blight, black rot, and soft rot. Physiological disorders include heartburn, hollows, and stem cracks; the main pests are aphids. Spot blotch. Can be 75% chlorothalonil or 55% carbendazim WP 600 times spray control, once every 7 days, 2 or 3 times in a row. aphid. Can be used 50% to wipe mist wettable powder 2000 times spray control. Reasonable harvesting: The specific harvesting standards for celery depend on the cultivation method and market demand. Generally, 90 to 120 days after planting, harvesting can begin. Qiuyu planting can be harvested in late November; autumn is planted in late November to build the wall, cover film and grasshopper, insulation and cold, can be delayed to New Year's Day market. When the harvest was done, the outermost leaves were not yellow, and it was advisable to harvest the leaves before they were burned. Generally, the yield per mu is more than 5,000 kg, and the highest one is 10,000 kg.