Spring celery cultivation techniques

1. Varieties should be selected for cold cultivation, early winter, late bolting, vigorous growth, good quality, suitable for spring cultivation of varieties. Such as large-leaved celery, milk stem celery, glass crispy celery, Jinnan real celery, Italian celery and so on. 2. Seedlings Celery seedlings are used to grow celery in the greenhouse from the end of January to the beginning of March. When planting seedlings in the open field, sowing should be done on sunny days from the end of February to the middle of April. During this period of sowing, the temperature is low, soaking before sowing, and germination under the conditions of 15°C to 20°C. Greenhouse seedlings should be covered with film (sheaf) in advance, and the seeds should be sown within 10 centimeters of ground temperature above 10°C. After seeding, the seedlings should be covered with a thin film or a small shed, and the shade net should be covered in the evening. Before the emergence, the pods can be appropriately high and promote the emergence of seedlings. After emergence, during the day, pay attention to ventilation and cooling (not exceeding 25°C) to prevent "high-legged seedlings" and diseases from happening. It is best not to lower than 8°C during the night. This is conducive to the cultivation of strong seedlings, but also delayed the adoption of the vernalization stage, reducing or delaying the celery pre-convulsions. Whether in greenhouses and open-air seedlings or live broadcast, the management of fertilizer and water should be strengthened in sunny weather. 3. The celery planting and management of live broth in spring must be done twice in the period between the seedlings and 1 to 2 leaf leaves in order to prevent the seedlings from being intensive and lengthy. In greenhouses, the ground is stable at temperatures of 10 cm from mid-March to late April. Planting at 5°C or more; planting seedlings in the field from late February to mid-April, and planting seedlings from early May to early June. The spacing of planting and seedlings was 10 cm and 10 cm, and the seedlings were selected and planted. Most of the seedbeds are left as "planters". Planting 35,000 to 40,000 pods per 666.7 square meters. 4. During the growth of spring celery harvesting, it is a process from low temperature to high temperature, which easily makes the plant through the vernalization and twitching. Therefore, we must harvest and market the celery before it is convulsed, so as not to reduce the quality. Therefore, its growth period is shorter than that of autumn and winter celery, and it is generally harvested from May to late June.

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