Fertilization method of celery, what fertilizer to apply to celery

First of all, sufficient base fertilizer should be applied, generally should be applied with high-quality rotting chicken manure 1500 kg mu, and at the same time in the growth period of appropriate topdressing, which is the guarantee condition of high yield and high quality of celery. The type of top dressing should be based on fast-acting nitrogen fertilizer, and pay attention to the combined application of phosphorus, potassium fertilizer and biological organic fertilizer, so that light fertilizer is applied frequently, and small water is often watered.

Seedling stage: Before sowing, the topsoil of the seedbed and fertilizer are fully mixed, raked finely and leveled. About 10 days after emergence, a fast-acting thin nitrogen fertilizer can be applied once, and a phosphorus-calcium fertilizer can be applied when 3 or 4 true leaves grow.

Field: The base fertilizer is deeply turned into the soil 7 to 10 days before planting, and the rake is leveled after whitening, and the planting ditch is opened. Top dressing, should be applied diligently, gradually thickened from thin, should use urea and bio-organic foliar fertilizer, do not use nitrate, ammonium nitrogen fertilizer so as not to hurt the roots, reduce yield and quality.

Celery requires plenty of fertilizer and water. After slowing seedlings, the first thin fertilizer can be watered with 1% urea and 5% superphosphate leaching solution. After that, it was applied every 10 days, and the amount of fertilizer gradually increased.

In the early stage, N and P fertilizers are the main fertilizers, and potassium fertilizers should be applied after the vigorous period. Calcium and boron elements can not be deficient, calcium deficiency is prone to heart rot, boron deficiency will cause plant rot, petiole cracking, long thorns, hollow and other phenomena.

The shape of celery is very different from that of ordinary celery, the petioles of ordinary celery are slender, hollow, with more fibers and strong fragrance, which are mainly used for stir-frying and seasoning; The petiole of celery is thick and fleshy, solid, less fiber, fat and sweet, very crisp, light fragrance, mainly for raw food, but also fried.

In addition to nitrogen, phosphorus and potassium, celery has a large demand for boron. The addition of zinc fertilizer can reduce the nitrate and nitrite content in fresh vegetables. To produce 1000 kg of celery, kilograms of pure nitrogen, kilograms of phosphorus pentoxide, and kilograms of potassium oxide.

Before planting, 4000-5000 kg of organic fertilizer, 150 kg of bio-organic compound fertilizer, 40 kg of urea, 25-35 kg of superphosphate, 40 kg of potassium sulfate, and 1-kg of zinc sulfate were applied per mu. When the plant enters the vigorous growth period, the first top dressing is carried out, and 3 kg of pure nitrogen and 5-6 kg of potassium oxide are applied per mu. After half a month, the third top dressing was entered, and 2-kg of pure nitrogen and 4-5 kg of potassium oxide were applied per mu.

Borax can be sprayed outside the roots during the vigorous growth period.

1. Bottom fertilizer: celery needs a lot of nutrients when growing, if you want celery to grow vigorously, you must apply the bottom fertilizer in the celery field, when choosing the bottom fertilizer, you can apply completely rotted farmhouse fertilizer to meet the needs of each stage of the celery growth cycle, and then you need to apply fertilizer according to the growth needs of celery in the seedling stage.

2. Seedling fertilization: Compound fertilizer can be selected at the seedling stage of celery, supplemented with nitrogen, phosphorus and potassium fertilizer, and nitrogen fertilizer will increase the length and number of leaves of the petiole applied to celery. If you want celery to taste good, you need to apply phosphorus fertilizer, which will increase the cellulose in the celery petioles.

Applying potassium fertilizer to celery can promote the expansion of celery petioles, improve yield and quality, and also quickly accelerate the growth rate of celery.

3. Top dressing during the growth period: the growth stage of celery, due to the rapid growth and short time, requires a lot of water and fertilizer, which needs to supplement the fertility of celery in different periods to promote the growth of celery.

It should be noted that celery should not be top-applied with urea, because the growth of celery is slow after top-dressing urea, the cellulose increases, the plant is easy to age, the quality is reduced, and it will have a bitter taste when eating.

In addition, celery belongs to the root system of shallow, weaker crops, according to the characteristics of celery, in the process of celery fertilization to follow the principle of less fertilization and frequent fertilization, to avoid a one-time fertilizer amount of too large to lead to root burning, there is to avoid not having time to be absorbed by the celery root system of nutrients, once infiltrated into the deep layer of the soil, resulting in soil compaction, after it is difficult to be absorbed by the root system.

1. Nitrogen fertilizer. Celery should be fertilized with more nitrogen fertilizer, but urea should not be topdressed. Celery requires a lot of nitrogen fertilizer throughout the growing period, and top dressing should be dominated by ammonium bicarbonate.

Do a small amount many times, generally need to top dressing 2-3 times. However, it should be noted that celery should not be top-applied with urea, because the growth of celery is slow, the cellulose increases, the plant is easy to age, the quality is reduced, and it has a bitter taste when eaten.

2. Organic fertilizer. Top application of organic fertilizer can improve the quality of celery. Applying organic fertilizer to poultry such as chickens and ducks, celery plants are tender and thick, the fiber is reduced, and the quality and yield are greatly improved. However, the organic fertilizer of the farmhouse that is not well rotted should not be applied as top dressing, so as not to cause burning and rotting roots.

3. Micro-fertilizer. Supplemental application of micro-fertilizer can prevent physiological diseases of celery. Calcium deficiency will cause celery "heartburn", and boron deficiency will cause celery hollowing, petiole cracking and other physiological diseases.

Foliar sprays of calcium chloride or calcium nitrate in water can prevent celery "heartburn". In order to prevent celery hollow and petiole cracking, borax can be applied basally, or foliar spray with boric acid solution.

Celery fertilization technology:

1 Seedling fertilizer Celery cultivated in protected areas generally has to go through seedling cultivation and then planting. Preparation of nutrient soil.

You can refer to the preparation method of nutrient soil of tomatoes, or you can use 1 2 vegetable garden soil and 1 2 rotten or according to the volume ratio.

After mixing the semi-decomposed compost, it is made into nutrient soil, and superphosphate is mixed with 2 3 by weight. Left 30 days after emergence.

Yes, apply a low-concentration nitrogen fertilizer once as appropriate, and apply 0,2 kg of ammonium sulfate or well-rotted dilute human feces per furrow.

2.Basal fertilizer Due to the shallow root system of celery and the high cultivation density, it is necessary to apply foot fertilizer when preparing the land before planting. Per.

4000 5000 kg of organic fertilizer and 30 35 kg of superphosphate were applied per mu. 25 kg of potassium sulfate, for the deficiency.

Boron soil can be applied with 1 2 kg of borax per mu.

3.Top dressing is generally produced during the seedling slowing period after planting, and the plant grows very slowly when the seedling is slow, in order to promote new roots.

and the growth of leaves, you can apply a seedling fertilizer, 10 kg of ammonium sulfate per mu with water, or 500 of rotted human feces

600 kg. From most of the new leaves to the vigorous growth period of the plant before harvest, the leaf area expands rapidly, the petiole elongates rapidly, the parenchyma in the petiole proliferates, the celery absorbs a large amount of fertilizer, the fertilizer absorption rate is fast, and it is necessary to top dressing in time.

For the first time, 7 9 kg of urea or 15 20 kg of ammonium sulfate and 10 15 kg of potassium sulfate were applied per mu. The first chase.

After half a month of fat, celery enters the vigorous growth period, with small white roots covering the ground, bright green and shiny leaves, and leaves appearing.

Now there are some bulges, then the second top dressing is carried out, and the amount is the same as the first time. Do it for the third time in about 15 days.

Top dressing, the amount of fertilizer is the same as the first time, or the amount of fertilizer is increased or decreased depending on the growth of celery.

The amount of nitrogen fertilizer and potassium fertilizer should not be too much each application, and the concentration of nitrogen and potassium in the soil is too high will affect the absorption of boron and calcium, causing the young tissues of celery heart leaves to turn brown and appear dry edges, and die in severe cases.

It is more severe when the ground temperature is low. Therefore, it is necessary to control the amount of nitrogen fertilizer and potassium fertilizer, increase the application of boron fertilizer and calcium fertilizer, and maintain.

Moisten the soil and avoid the soil temperature being too low. When the plant is boron deficient, it is also prone to stem fissures, and stem fissures mostly appear in the outer leaf petioles.

of the inside. Boron deficiency occurs during the development of the heart lobe, and the inner tissues turn brown and crack. Foliar sprays.

An aqueous solution of borax of 0 5 can avoid the occurrence of stem cracking to a certain extent.

When applying chemical fertilizer, it should be sprinkled after the dew has dissipated at noon, and the fertilizer that fell on the leaves should be swept away with a new broom.

Fertilize and irrigate at the same time. The irrigation standard should be such that the water should submerge the heart leaves on the furrow surface, so as to prevent them from falling into the heart leaves.

On the fertilizer burned out the growing point. After irrigation, it is necessary to strengthen the ventilation and keep the furrow surface moist. Top dressing should be used in high temperature and rainy seasons.

Nitrogen fertilizer, do not use human urine, so as not to rot the roots. Top dressing should be applied multiple times, not too much each time. Plastic Film Day.

The moisture in the light greenhouse is not easy to lose, especially in the severe cold winter, the wind release time is short, the indoor humidity is too large, and the plants.

The amount of transpiration is small, and the frequency and amount of irrigation should be minimized to prevent diseases caused by excessive humidity.

Hello? For your reference: For celery seedlings, you can choose a compound fertilizer with low nitrogen, low phosphorus and medium potassium as basal fertilizer.

Transplanting ground answer. Block selection in three years has not been planted vegetable plots, on this basis can be selected rotted and fermented chicken manure organic fertilizer 1 3 square per mu, fast-acting fertilizer selection of low nitrogen, phosphorus, potassium compound fertilizer as base fertilizer, conditional can be used microbial fertilizer per mu 500 grams, boron, zinc fertilizer 200 grams per mu.

When celery needs top dressing, you can choose low nitrogen and high potassium fertilizer and apply it with water.

Celery foliar surface can be sprayed with boron, zinc, calcium, potassium dihydrogen phosphate.

Thank you for your question.

It is recommended that you take a look at the "Nutritional Characteristics and Fertilization Technology of Celery" by China Food Science and Technology Network.

Celery is a cold-tolerant vegetable that prefers coolness and humidity and can be cultivated all year round. However, strong seedlings need to be cultivated before cultivation, and the amount of seeds per mu is generally 30 50 grams. In the past, people generally advocated 50 to 60 days of seedling age, and we generally promoted 90 to 100 days of large seedlings.

1.Seedling. If the seedlings are raised in the low temperature season, they generally need to soak the seeds to promote germination, soak the seeds in water for 12 24 hours, and the germination temperature is 15 20 after sowing and cover the fine sand 1 cm or fine wet soil centimeter, and the back cover film is moisturizing and insulation, and the soil temperature is required to be 15 20 degrees.

If sowing in the high temperature season, it is generally a dry seed seedling, and then cover the shade with a thin straw curtain immediately after sowing, and gradually reduce the shade after the emergence of seedlings.

After the emergence of seedlings, the water absorption of seedlings is poor, and it is necessary to water a small amount of water frequently, up to 2 3 leaves for seedling, and then the furrow surface is dry and wet, and it can be planted up to 3 leaves and 1 heart or 4 leaves and 1 heart.

2.Colonization. The density of colonization depends on the size of the variety itself and the demand for the size of the product, generally for the purpose of a single plant weighing 700 1000 grams of products, the plant row spacing should be 25 35 cm square; For products weighing 300 600 g per plant, the row spacing should be 17 25 cm square; For products weighing 250 300 g per plant, the row spacing should be 13 17 cm square.

3.Post-colonization management.

The temperature is generally kept at 15 20 degrees during the day and 5 10 degrees at night, and the night temperature is not lower than 5 degrees.

The seedling height is about 15 cm, and when it begins to close to the ridge, it begins to top dressing and watering, each time per mu with 15 20 kg of ammonium nitrate or 25 30 kg of ammonium sulfate, after 3 5 days called watering 1 time, 15 20 days or so top dressing 1 fertilizer. 50 The fruit can be picked after 60 days.