1.Small water supply to promote slow seedling

Celery likes cold and cool climate, high humidity and high temperature are not good for its growth, autumn celery has a higher temperature during the growing season, autumn celery has a higher temperature in the early stage of growth, and a large amount of evaporation, especially the increase of planting is more prone to drought and water shortage, which affects the root system. Therefore, celery should be watered in a timely manner after planting to ensure that the soil is dry and wet to promote slow seedlings, but not watered too much to prevent roots and excessive length. The correct method is to use micro-spray irrigation, which can ensure uniform irrigation without causing large roots. Slow watering period is usually watered for two days to ensure the water supply of celery.

2. Moderate water control to promote squatting

After the seedlings of celery were slowed down in autumn, the temperature gradually decreased, and the plants began to grow in large quantities, but the initial growth was small and the amount of water required was not large. The water can be controlled moderately to promote rooting and prevent excessive lengthening. 3 cm) for 10-15 days of squatting seedlings, when the plant clusters, the heart leaves begin to grow upright, and a large number of roots grow underground, it indicates that the plant has ended the outer leaf growth period and entered the heart leaf hypertrophy period, and the squatting seedlings should be ended.

3. Fractional top dressing to promote stem and leaf growth

From the display of most new leaves until the plant enters a vigorous growth period before harvest, the amount of fertilizer absorbed is large, and timely topdressing is required. Celery loves nitrogen and potassium, in order to promote the rapid growth of stems and leaves. After squatting, you can apply potassium nitrate or balanced type per acre. Potassium sulfate compound fertilizer 10-15 kg. Half a month after the first fertilization, celery enters a vigorous growth period, at which time the second fertilization is performed. After another half a month or so, a third fertilization is performed, or the amount of fertilizer is increased or decreased depending on the growth of celery. Stop applying nitrogen fertilizer within 30 days before harvest to prevent affecting the flavor of celery. In this period, foliar spraying of "Yufeng" can also be applied to improve the quality of celery.

4. Add trace elements to improve the quality of celery

In recent years, physiological diseases such as hollow, heartburn, and split stems that often occur in the production of celery are mostly related to the lack of supplementation of trace elements such as boron and calcium, especially for many years of severe stubble plots. In addition to organic fertilizer, one kilogram of boron fertilizer, 25 kilograms of "silicon, potassium, calcium, and magnesium fertilizers" can be applied per acre and deep-divided into the soil to improve its utilization rate. In September, when the stems and leaves of celery grow vigorously, foliar spraying of liquid fertilizers such as "instant boron, giant energy calcium, Yufeng" can greatly improve the quality of celery and reduce the problems of hollowness, heartburn, and split stems. Celery is very particular about the use of fertilizers during the growing season. It is necessary to apply fertilizer scientifically to ensure the high yield of celery cultivation. The following introduces what fertilizers are suitable and not suitable for celery. A large amount of nitrogen fertilizer is required during the growth period, and the topdressing is mainly based on ammonium bicarbonate. A small number of times are required, and the topdressing is generally required 2 to 3 times. However, it should be noted that celery should not be topdressed with urea, because after celery topdressed with urea, the growth slows down, the cellulose increases, the plant is easy to age, the quality is reduced, and it has a bitter taste when it is eaten. Urea.

Top-up organic fertilizer Top-up and fully rotten organic fertilizer can improve the quality of celery. Note that organic fertilizers that are not rotten should not be used as topdressing fertilizers, so as not to cause burning and rotten roots. After applying organic fertilizer, the plant stems are soft and stout, the fiber is reduced, and the quality and yield are greatly improved.

Supplemental micro-fertilizer Calcium deficiency can cause celery "heartburn", boron deficiency can cause celery hollow, petiole cracking and other physiological diseases. Foliar spraying of 0.5% calcium chloride or calcium nitrate solution can prevent celery from "heartburning". To prevent celery from being hollow and petiole cracking, 0.5 to 0.75 kg of borax can be applied per acre, or 0.3% to 0.5% of borax can be used. The solution is foliar sprayed.

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