Celery, an umbelliferous plant. There are three kinds of cress, celery and celery, and their functions are similar. The aroma of dried celery is thicker and is called "medicinal celery". But coriander is not a species, celery is rich in protein, carbohydrates, carotene, B vitamins, calcium, phosphorus, iron, sodium, etc., at the same time, has a liver and heat, phlegm and dampness, in addition to annoying swelling, cooling blood Hemostasis, detoxification and Xuanfei, Jianwei Lixue, Qingchang Lijun, Runfei Cough, lower blood pressure, brain and calm. Eating celery, especially eating celery leaves, is very beneficial for preventing hypertension and arteriosclerosis, and has an auxiliary therapeutic effect.
Fertilizer
In the autumn, the vegetative growth of celery is high, and the absorption of nitrogen, phosphorus, potassium, magnesium and calcium accounts for more than 84% of the total absorption. Celery requires the highest amount of nitrogen, followed by calcium and potassium, and phosphorus and magnesium. The celery needs a large amount of boron. When the boron-deficient soil or the low temperature inhibits absorption due to drought, the petiole is easy to rupture, that is, the "stem disease", which seriously affects the yield and quality.
Fertilization
Under medium fertility level, the fertilization amount per mu of celery is 2500-3000 kg (or commercial organic fertilizer 350-400 kg), 13-16 kg of nitrogen fertilizer, 5-6 kg of phosphate fertilizer, 6-9 kg of potassium fertilizer, nitrogen, Potassium fertilizer is divided into base fertilizer and three top dressings. The ratio of fertilization is 2:3:3:2. Phosphate fertilizer is used as base fertilizer, and fertilizer and farmyard manure (or commercial organic fertilizer) are mixed.
base fertilizer
Apply 2500-3000 kg of farmyard manure or 350-400 kg of commercial organic fertilizer per mu, 4-5 kg ​​of urea, 11-13 kg of diammonium phosphate, and 4-5 kg ​​of potassium sulfate.
top dressing
In the growth period of the seedlings, the application of urea is 6-8 kg, and the potassium sulfate is 3-4 kg; in the early stage of vigorous growth, 8-11 kg of urea is applied, and 3-5 kg ​​of potassium sulfate is applied; in the middle of vigorous growth, urea is applied 6-8. Kilograms, potassium sulfate 3-4 kg.
Top dressing
If heart rot is found, foliar spray can be applied with 0.3% to 0.5% calcium nitrate or calcium chloride. Foliar application of boron fertilizer can avoid the occurrence of stem cracks to a certain extent, spraying 0.2% borax or boric acid solution 40~75 kg per acre. Facility cultivation can increase carbon dioxide gas fertilizer.
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