In the north,/kloc-65438 was planted in protected land from October to March, planted in open field from March to April, and harvested from May to July. March is the suitable sowing date in the Yangtze River basin. If sowing is too early, it is easy to bolt prematurely according to vernalization stage, and if sowing is too late, it will enter the heat in the middle and late stage, which will endanger the yield and quality.

Planting time of summer celery

Seeding in the open field after frost in spring, sowing in the first half of June-July and harvesting and selling in August-September. In high temperature and rainy season, summer celery has poor growth and development, many seedlings are lost, low yield and small total planting area.

Planting time of autumn celery

Sow seedlings in the first half of June-July, sow in the first half of August-September,10-1harvest. Sow in the Yangtze River valley from mid-July to mid-September, harvest at 10 to 12, and sow late until March to April of the following year before bolting. It can be planted in the Yangtze River reach and the southern region, from September to 165438+ 10, and harvested from February to April of the following year. Protected areas can be planted in the north.

Planting techniques of celery sowing and seedling raising

Selection of seedbed: celery likes wet and cold weather, and its seedbed should be selected in a cool place with loose and fertile soil layer and convenient irrigation. 1 mu soil application 100 kg lime powder should be turned into the soil and burned dry.

Tillage: the width of the border is 1 m long, and 2000KG of human and animal manure is applied to one mu of soil. After air-drying, the border surface was rolled flat, and 1KG carbofuran was added in the whole soil process to solve the loach problem.

Soaking seeds to accelerate teeth: put the seeds in a cloth bag, tie one end of the rope tightly and hang it in the river for 48 hours, then hang the seeds in the river about 0.5 meters long to accelerate teeth, and germinate in 3-4 days. When more than 80% of the seeds germinate, they can be planted. If there are no deep wells, you can put them in the crypt of the refrigerator or freezer to accelerate, that is, soak them in wet and cold water for 48 hours, and then take them out to dry.

Celery seedling

Moderate sowing: sowing date: summer celery, before and after summer heat (middle and late July); Autumn celery, summer heat (mid-late August) and cold dew (mid-early September); Winter celery, beginning of autumn frost (mid-September) (65438+1mid-October)} spring celery, precipitation (mid-February) and cold dew (mid-March).

Sowing amount: 1 mu street needs 500 grams of seeds, and 1 mu seedbed can sow 2 kilograms of celery seeds. When sowing, old chaff ash or dry fine soil should be stirred to produce bud seeds and spread evenly. After putting it away, gently pat the surface of the cup and sprinkle water with a watering can. Then, wrap plastic shed in winter and cover sunshade screen in summer to cool down, prevent water and rain.

Management method of seedbed: generally, water it once in sunny evening, and water it once in the morning, middle and evening when it is sunny, hot and dry. After all the seedlings are planted, apply fertilizer gradually, topdressing light fertilizer every 5-7 days, and pay attention to the prevention and control of aphids.

Whole soil fertilization: To plant celery, sandy soil containing soil organic matter should be selected, which has strong water and fertilizer conservation ability. 1 mu to extract quicklime powder 1.5200kg into the soil, bake it to white, and it becomes a long border soil with a width of 1.67m, with 1 mu of vegetable waste 1kg and human and animal manure.

Celery colonization

Planting: when the seedling age is 5060 days and the seedling height is 12 15 cm, the seedling can be pulled out and planted. Spraying pesticides (such as killing enemies) once before pulling out seedlings, and watering 3-4 hours before pulling out seedlings to make the bed soil fully wet. Planting row spacing 16-26 cm, cluster spacing 1 cm, 4-5 plants per cluster. Plant and water.

Cultivation techniques: After the seedlings are planted and before they survive, water them once a day in the morning and evening, and pay attention to check and replenish the seedlings to ensure that the seedlings have just sprouted. After surviving, Qin Ying applied manure to keep the soil moist. Before departure, shallow soil tillage should be carried out for 2-3 times. In the hot and dry season, the greenhouse or small plastic shed should be covered with sunshade net or set with hair rope for shade at the early stage of growth. Especially in the case of drought, when the temperature is low, the border irrigation canal should be done in the morning and evening, and water should not be filled on the compartment surface. After the compartment is wet, the water should be discharged quickly to maintain the healthy growth and development of celery.

Disease control: celery diseases include leaf blight and leaf blight, which can be controlled by zineb, triadimefon or mancozeb. Aphids are the key pests, and dichlorvos or dimethoate can be used for control.