Planting time and cultivation techniques of celery

Vegetable is a kind of vegetable which likes shade and can not bear high temperature, which is distributed in most parts of our country at present. Celery tastes very good, crispy and has a good therapeutic value in lowering blood pressure. Many people want to grow celery, so the first thing is to master its planting technology.

Celery planting time

1. Spring celery: the seedlings were raised in the protected field in the north from January to March, planted in the open field from March to April, and harvested from May to July.

2. Summer celery: planted from June to early July, harvested and listed from August to September.

3. Autumn celery: sowing and raising seedlings in the north from June to early July, planting from August to early September, and harvest from October to November.

Cultivation techniques of celery

1. It is necessary to select the seeds and raise the seedlings. Winter cultivation, should choose cold-resistant, solid storage, dark green varieties. Whether planted in winter or summer, the seeds should be soaked, washed, germinated and sowed after the seeds are exposed. Seed dressing with new high-fat membrane during sowing can drive out underground diseases and insect pests and improve seedling emergence rate. Select a piece of land with loose texture, fertile soil and deep soil layer to raise seedlings, strengthen fertilizer and water management at seedling stage, watering small water frequently, applying thin fertilizer frequently, and cultivate strong seedlings.

2. It is necessary to do a good job in land treatment before planting. Planted in winter, before planting, 100 tons of fully rotten farm manure per mu, spread evenly. At the same time, one hundred and fifty kilograms of quicklime was applied per mu, shallow ploughing and fine raking, fertilizer, soil and lime were mixed evenly, and then the soil was prepared.

3. Reasonable close planting and large seedlings should be planted. The selection of the same size, there are 3 Mel 4 leaves of large seedlings planted. The distance between rows and plants is 5 cm × 8 cm, or 6 cm × 7 cm, leaving only one seedling in each hole. In this way, the size of each celery plant is basically the same. Moreover, in the later stage, the leaves overlap each other to block out the sun shining on the petiole. The petiole is not only long, but also brightly colored, crisp and attractive. After transplanting, the new high-fat film was sprayed in time to prevent ground water evaporation, plant water transpiration, shorten the slow seedling period and quickly adapt to the new environment.

Fertilizer and Water Management of celery

Celery absorbs a lot of fertilizer and water, but it is not resistant to thick fertilizer, so topdressing should be combined with watering, usually irrigating every morning and evening in autumn, fertilization should be done every 7 days, and 10-15kg of Plant should be used per 667m2. In addition, attention should be paid to the supply of calcium and boron. If calcium deficiency, prone to heart rot and magnesium deficiency (mosaic); boron deficiency, early outer leaf deformity or hardening, petiole often split in the later stage. Boron deficiency is most likely to be induced when the soil is dry and short of water, so in addition to more watering, generally 500 × 700g of borax is needed per 667m2 or 0.2% borax solution is sprayed on the leaf surface for 2 times.

Pest control of celery

1. Spot blight. Leaf spot blight mainly harms leaves. At the beginning, the disease spot of the leaf was round or irregular, with obvious edge, yellowish brown, gray-white in the center, and black dots scattered on it. The disease is serious when it is cold and humid, rainy or the plant is weak.

Prevention and control methods: strengthen field management, apply sufficient fertilizer, reasonable topdressing, enhance plant disease resistance. Cultivation in the shed should pay attention to cooling and dehumidification, reduce the temperature difference between day and night, reduce dew, and avoid flood irrigation. In case of illness in the shed, 5% chlorothalonil dust can be sprayed, 1 kg per mu. The open field can spray 75% chlorothalonil wettable powder 600 times liquid, 60% ethyl phosphate aluminum wettable powder 500 times liquid, 47% Ruinong wettable powder 500 times liquid, once every 7-10 days, continuous prevention and treatment for 2-3 times.

2.Sclerotinia sclerotiorum. The symptom is harmful to celery stems and leaves. At first, the injured part was immersed in brown water, soft rot was formed when the humidity was high, white hyphae appeared on the surface, and then black sclerotia like mouse feces were formed. The sclerotia germination temperature is 5-20 degrees, 15 degrees is the most suitable, and the disease is easy to occur and epidemic when the relative humidity is more than 85%.

The method of prevention and control: 3-year rotation. Select seeds with 10% salt water before sowing, remove sclerotia, rinse with clean water, and dry and sow seeds. The initial stage of the disease was sprayed with 50% acetaminophen or 50% prohydantoin or 70% methyl topiramate wettable powder 600 times or 50% carbendazim 500 times. The disease occurred in the shed with dust method, spraying 5% chlorothalonil dust, 1 kg per mu each time.

Celery will vary according to the variety, and the planting time is different. Before planting, it is necessary to understand the habits of the selected variety. The planting method of celery is very simple, the work of fertile land needs to be done first in the early stage, and the management in the later stage can not be lax, the combination of the two can ensure the growth of celery better.