1. Reasonable selection of varieties
(1) This celery cultivar Jinnan celery, glass crisp, white celery, etc.
(2) The varieties of celery such as Gao Youqi, Ventura, and Shuanggang Celery.
2, soil preparation, fertilization
Suitable for growth in loam or clay loam, moderate or slightly acidic. Usually two to three years of rotation, about half a month before planting, the soil should be ploughed and dried. Combine plowing, apply 4,000-5000kg of organic fertilizer, 30-35kg of superphosphate, and 10-15kg of urea per 667 作 of basal fertilizer, and apply some leafy vegetables containing phosphorus, potassium, calcium and trace elements (such as boron, etc.) Special compound fertilizer supplemented with boron and calcium nutrition to prevent the occurrence of petiole crack disease and rotten heart disease. When the site preparation for 1.5-2m (including ditch), 20-25cm high.
3, sowing and nursery
(1) The selection of seedbed should select a plot with high topography, convenient drainage and irrigation, good water retention and fertility conservation, fine soil preparation, and application of fully decomposed organic fertilizer. In order to avoid exposure and rain cooling, the seedbed must be shaded and covered in a small shed outside the seedling bed. It is 1-2m high and covers the old film. The skirt film should be rolled off the ground so that the seedbed can be ventilated and cool. The rolled up film should be put down to prevent the rain from flowing into the seedbed and cause damage. Under the old film, it is best to cover a layer of shade net or curtain, leafy branches and weeds, etc. to play a role in cooling the sun. Digging irrigation and drainage ditch around the seedbed.
(2) Seed treatment and germination The seeds of celery are not easy to germinate at high temperatures, and soaking at low temperature for 6-8 days before sowing. Soak in cold water for 24h, wash with water several times, while gently rub the seeds, and then remove the seeds and wrap them in gauze or sacks, place them in a cool place (15-18 °C, germination, wash seeds with cold water daily 1 Times, 6-8 days seed dew shoots, you can sow.
(3) sowing generally wet sowing method, the first pouring sole water, water infiltration after the overlying layer of sieved fine soil, the seeds of urging buds and some fine sandy soil mixed evenly sowing. Immediately after sowing, a layer of fine fluvo-aquic soil is covered, and the seeds can be covered by approximately 0.3 cm thick. Cover shade nets, straw, grass and other materials to achieve the purpose of cooling, insulation, and anti-rainstorm. After emergence, remove the cover.
(4) Seedling management After seeding, the seedbed soil should be kept moist before emergence. When the young shoots are topped with soil, the water can be poured lightly. After the small seedlings are flushed, the soil remains moist, and the water is poured once every 2-3 days. , sooner or later, when the seedlings grow 1-2 leaves, they can sprinkle a fine soil, gradually roll up the shade covered by the arch shed, exercise the seedlings, remove the shade shed in late August, and grow 3-4 seedlings. Splitting the seedlings and weeding the leaves is usually done in the afternoon. After sub-seedling survival, topdressing, applying 5kg of urea per 667 ;; seedling height 10cm, with topdressing urea 6kg. To be seedling when 5-6 leaf colonization.
4, colonization
Reasonable dense planting and soil softening are important measures for winning high yields and high quality. After dense planting or softening, the thick angle tissue of the leaves is still not well developed, parenchyma cells increase, petiole thick and tender. Live seedlings should be about 3cm high between the seedlings, seedlings about 12cm high, with 4-5 leaves can be set or planted. The celery sown in late summer and early autumn was planted at 6cm row spacing, and the late sowing could be increased to 12cm row spacing. Generally do not need to soften this density.
For softening cultivation, we can make the width 1.3-1.6m or 2.6-3.3m according to the specific conditions of each place, 2 lines per plant, planting the ditch, making the plant width 0.5m, height about 24cm, for later use of soil, planting plants from 6cm about. About 50 days after the general sowing, choose large seedlings planted. Planting should not be too shallow or too deep so as not to affect rooting and growth.
The earth is softened by celery, usually about 30 cm in height, and it should be done when it is dry, dry, and seedling dry, and care should be taken not to injure the plants and to prevent the soil particles from falling between the leaves, so as not to cause rot. Earth-cultivation is generally carried out after the cool autumn season. The earth is planted 1-2 times early and 3-4 times late. Each time the earth is raised, the height of the leaves is not buried. Spring sowing celery is generally not softened by earth.
5, field management
After the seedlings are planted, they should be diligently watered within 3 days to keep the water table moist and reduce the ground temperature to promote the seedlings. After easing the seedlings, the plants began to grow. Watering should be controlled, and shallow cultivators should be used to promote the development of new roots. In addition to net weeds, the lower yellow leaves should be removed. When the new growing leaves of celery stand upright, the leaves increase and the petiole stretches. When the celery grows into a vigorous growth period, it is the main formation period of the yield and should be attacked by water and fertilizer. To keep the soil moist in management, usually water is poured every 4 to 5 days, combined with 4 to 5 times of watering period, 10 to 15 kg of urea every 667 hrs, and water should be reduced after the weather turns cold. In the late growth stage, 0.3%-0.5% potassium dihydrogen phosphate solution can be sprayed on the leaves, which is beneficial to the increase of the yield and quality of celery.
6. Pest control
Diseases of celery mainly include early blight, spot blight, sclerotinia, soft rot, virus disease and black spot, etc. The main pests are aphids. Comprehensive prevention and control should be adopted to prevent the main thing, paying attention to the cleanliness of the pastoral garden, rational rotation, and seed disinfection. Celery is prone to physiological diseases during the cultivation process. Black heart disease occurs in calcium-deficient acid soils.
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