To improve the yield and quality of celery, be particular about watering and fertilizing

1. Diligent watering of small water to promote slower seedlings

Celery likes a cold climate, high humidity and high temperature are not good for its growth. Autumn celery has a higher temperature during its growth period. It has a higher temperature in the early stage of autumn celery, and has a large evaporation. Therefore, celery should be watered at the right time after planting to ensure that the soil sees dry and wet, and promotes the slowing down of seedlings, but it should not be watered too much to prevent rooting and overgrowth. The correct method is to adopt micro-sprinkler irrigation, which can ensure even irrigation, and prevent the water from retting the roots. The slow seedling period is generally watered once every two days to ensure the water supply of celery.

2. Properly control water to promote squatting seedlings

After the autumn celery is slowly seedling, the temperature gradually decreases and the plants begin to grow in large quantities, but the early growth is small and the water demand is not large. The water can be moderately controlled to promote rooting and prevent overgrowth. 3 cm) squatting seedlings for 10-15 days. When the plants are clustered, the heart leaves begin to grow upright, and a large number of roots grow underground, which indicates that the plant has ended the outer leaf growth period and entered the heart leaf hypertrophy period, and the squatting should end.

3. Topdressing in batches to promote the growth of stems and leaves

From most of the new leaves on display until the plant enters the vigorous growth period before harvest, the amount of fertilizer absorption is large, and it is necessary to apply fertilizer in time. Celery likes nitrogen and potassium. In order to promote the rapid growth of stems and leaves, potassium nitrate or balanced type can be applied per mu after squatting the seedlings. Potassium sulfate compound fertilizer is 10-15 kilograms. After half a month after the first top dressing, celery enters the vigorous growth period, and then the second top dressing is carried out. In another half a month or so, perform the third top dressing, or increase or decrease the amount of fertilizer 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, the leaves can be sprayed with "Yufeng" liquid surface fertilizer to improve the quality of celery.

4. Increase the application of trace elements to improve the quality of celery

In recent years, most of the physiological diseases such as hollowing, heartburn, and stem cracking in the production of celery are related to insufficient supplementation of middle and trace elements such as boron and calcium. This is especially serious when cropping plots for many years. Therefore, in addition to applying more base fertilizers In addition to organic fertilizer, one kilogram of boron fertilizer and 25 kilograms of "silica, potassium, calcium and magnesium fertilizer" can be applied per mu, and they should be turned into the soil deeply to improve their utilization. In September, when the stems and leaves of celery are growing vigorously, the leaves can be sprayed with liquid surface fertilizers such as "instant boron, Juneng calcium, and Yufeng", which can greatly improve the quality of celery and reduce the occurrence of problems such as hollowing, heartburn, and stem cracking. Celery is very particular about using fertilizers during the growth period. Scientific application of fertilizers is necessary to ensure the high yield of celery planting. The following introduces what fertilizers are suitable and unsuitable for celery. During the growth period, celery should be properly applied with more nitrogen fertilizer throughout the entire period. During the growth period, a large amount of nitrogen fertilizer is needed. The top dressing should be mainly ammonium bicarbonate, and the top dressing should be done in small amounts for many times, usually 2 to 3 times. However, it should be noted that celery should not be topdressed with urea, because after celery is topdressed with urea, the growth will slow down, the cellulose will increase, the plant is prone to aging, the quality is reduced, and it has a bitter taste when eaten, so celery should not be topdressed during the entire growth period. Urea.

Topdressing of organic fertilizers Topdressing of retorted and fully decomposed organic fertilizers can improve the quality of celery. Note that organic fertilizer that is not decomposed should not be used as top dressing to avoid burning roots. After applying organic fertilizer, the stalks of the plants are soft and thick, the fiber is reduced, and the quality and yield are greatly improved.

Replenishing micro-fertilizers. Calcium deficiency can cause "heartburn" in celery, while boron deficiency can cause physiological diseases such as hollow celery and petiole cracking. Spraying 0.5% calcium chloride or calcium nitrate solution on the leaves can prevent celery from "heartburning"; in order to prevent celery from hollow and petiole cracking, 0.5-0.75 kg of borax can be applied per acre, or 0.3%-0.5% borax can be used Foliar spray of the solution.

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