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. The temperature in the early stage of autumn celery is higher, and the evaporation is large. Especially the increased colonization is more prone to drought and water shortage, which affects the root system. 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 not too much watering to prevent retting and excessive growth. The correct way 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. Moderate water control to promote squatting seedlings

After the autumn celery is slowly seedling, the temperature gradually decreases, and the plants begin to grow in large quantities. However, the early growth is small and the water demand is not large. The water can be moderately controlled to promote rooting and prevent overgrowth. After the slow seedling, it can be combined with shallow tillage (no more than 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. The squatting should end.

3. Topdressing in stages 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 seedlings. Potassium sulfate compound fertilizer is 10-15 kg. After half a month after the first top dressing, celery enters the vigorous growth period, and then the second top dressing is performed. 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. During this period, the leaves can be sprayed with "Yufeng" liquid surface fertilizer to improve the quality of celery.

4. Add trace elements to improve the quality of celery

In recent years, most of the physiological diseases such as hollowing, heartburn, and stem cracking that frequently occur in celery production are related to insufficient supplementation of middle and trace elements such as boron and calcium. This is especially serious when cropping fields 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 "silicon, potassium, calcium and magnesium fertilizer" can be applied per mu, and they should be turned deep into the soil 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. 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 quantities 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 plants are 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 organic fertilizer Topdressing retorted, fully decomposed organic fertilizer can improve the quality of celery. Note that organic fertilizers that are not decomposed can 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.

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

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