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2. Avoid applying chlorine-containing fertilizers: Chlorine-containing fertilizers should be applied to vegetable fields. After ammonium or potassium nutrition is absorbed by soil or absorbed by crops, chloride ions remain in the soil. When the concentration reaches a certain amount, it will poison the crop roots. Decreased the starch and sugar content of vegetables and even caused the plants to die. Especially tomatoes, potatoes and other vegetables, most sensitive to chlorine. Do not apply in production.
3, avoid applying fresh manure: Some vegetable farmers do not pay attention to fertilization and sanitation, and apply fresh human excrement directly into the vegetable field, which is considered to be directly applied to fertilizer. In fact, this has created conditions for the spread of tsutsugamushi disease. The fresh manure and urine that have not been piled up and rotted contain asbestos eggs. The eggs of the mites are very strong in the outside world and generally survive for 4-6 months. When people eat vegetables contaminated with mites, they will be infected with tsutsugamushi disease, which will cause Aphid asthma, aphid pneumonia, intestinal perforation, acute peritonitis and other diseases. In this regard, before the application of human excrement in the vegetable field, it must be suffocated by high temperature and fully fermented before application.
4, avoid drought fertilization: vegetables are hi-fertilizer crops, fertilize when the soil is dry. Not only the fertilizer effect can not be fully exerted, but also the concentration of the soil solution suddenly rises, which easily causes root burning. therefore. Fertilize the vegetables and match them with the irrigation. 10 cm from the root of the vegetable, ditch and fertilize, then fill the water.
Huaxian County Agricultural Products Inspection and Testing Center Chang Bili
Vegetable fertilization pay attention to four bogey
l, avoid applying nitrate nitrogen fertilizer. When nitrate-nitrogen fertilizer is applied to vegetables, the nitrate content in vegetables will be multiplied. Vegetables with high nitrate content may cause degeneration of hemoglobin in the human body, causing hypoxia in the brain, heart and other organs, and paralysis of the respiratory center. Therefore, vegetables should avoid the application of nitrate-nitrogen fertilizer, and ammonium nitrogen fertilizer should be selected.
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