Ammonium Nitrate Other nitrate fertilizers should not be applied to vegetables. Nitrate ammonia fertilizers will increase nitrate content in vegetables after being applied to vegetable fields. Nitrate is easily reduced to nitrite and nitrite in human body. It is a highly toxic substance that is extremely harmful to the human body. Ammonium chloride, potassium chloride and other chlorinated fertilizers should not be applied to tomatoes and potatoes. After the chlorine-containing fertilizer is decomposed in the soil, ammonium or potassium ions will be absorbed by the soil or absorbed by vegetables. When the concentration reaches a certain level, it will It is toxic to vegetable roots, and it can cause serious vegetable death. Leaf vegetable vegetables avoid nitrogen fertilizer on the leaf surface. The vegetable leaves are sprayed with nitrogen fertilizer, and the ammonium ions are easily converted into acid ions after being contacted with air. The leaf vegetables are absorbed by the leaves, and the growth period of the leafy vegetables is short, so it is easy to accumulate nitrate. In the leaves. Therefore, avoid spraying ammonia fertilizer on leaf vegetables. Applying micro-fertilizer to vegetables can promote the high quality and high yield of vegetables, but the demand for microelements in vegetables is very small. Excessive application of fertilizers not only results in waste, but counties tend to produce poisons and pollute the environment. The amount of ferrous sulfate per mu cannot exceed 3.25 kg. The consumption of manganese sulfate and manganese chloride per month cannot exceed 2.05 kg. Copper sulfate cannot exceed 2 kg per mu. The amount of borax and boric acid per mu cannot exceed 1.25 kg.
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