Vegetable fertilization matters needing attention

The application of micro-fertilizer on vegetables can promote the high quality and high yield of vegetables, but the demand for micro-elements in vegetables is very low. Excessive application of micro-fertilizer not only causes waste, but also easily produces toxicity to crops and pollutes the environment.The amount of ferrous sulfate per mu should not exceed 3.25 kg.Manganese sulfate, manganese chloride monthly mu dosage can not exceed 2.05 kg.Copper sulphate dosage per mu cannot exceed 2 kilograms.Borax, boric acid dosage per mu cannot exceed 1.25 kilograms.

Leaf vegetables avoid leaf surface spraying nitrogen fertilizer.When nitrogen fertilizer is sprayed on vegetable leaves, the ammonium ions can be easily converted into acid ions and absorbed by the leaves after contact with air. In addition, the growth period of leafy vegetables is short, so nitrate can be easily accumulated in the leaves.Therefore, avoid spraying nitrogen fertilizer on the leaf surface of leafy vegetables.

Ammonium nitrate and other nitrogenous fertilizers should not be applied to vegetables in general.Nitrogenous fertilizer application into vegetable fields, will make the nitrate content in vegetables multiplied, nitrate in the human body is easy to be reduced to nitrite, nitrite is a highly toxic substances, great harm to the human body.

Ammonium chloride, potassium chloride and other chlorinated fertilizer, should not be applied to tomatoes, potatoes.After the decomposition of chlorine-containing fertilizers in the soil, ammonium or potassium ions will be absorbed by the soil or vegetables. When the concentration reaches a certain level, it will poison the vegetable root system and cause vegetable death if it is serious.