Which chemical fertilizers should not be applied to vegetables? Fertilization taboos you need to know
In the process of growing vegetables, if you want the vegetables to grow faster and better and to obtain higher yields, fertilization is indispensable. However, more fertilizer is not always better. Fertilizing vegetables is especially critical, and some fertilizers are not suitable for application to vegetables. Below, the editor brings you the fertilizers that are not suitable for use in vegetable production. Let's take a look.
1. Nitrate nitrogen fertilizers
Ammonium nitrate and other nitrate nitrogen fertilizers are generally not suitable for application to vegetables, because after nitrate nitrogen fertilizers are applied to the soil, they will cause the nitrate content in vegetables to increase several times over. Although this substance affects vegetable growth, once people eat such vegetables, the nitrate is very easily reduced to nitrite in the human body. This is a highly toxic substance with great harm to the human body. Once this substance accumulates too much, it may endanger life safety, so it is not suitable for application to vegetables.
2. Chlorine-containing fertilizers
Like nitrate nitrogen fertilizers, ammonium nitrate and other nitrate nitrogen fertilizers are generally not suitable for application to vegetables, especially tomatoes and potatoes. After application, they decompose in the soil and are converted into ammonium ions and potassium ions, which are very easily adsorbed by the soil and absorbed by vegetables. If the concentration is relatively low, then it will not have much effect on vegetables, but once the concentration is too high, it will poison the vegetable root system, and in severe cases cause vegetable death. The harm is great, and it can often cause total crop failure, dealing a devastating blow to farmers.
3. Foliar spraying of nitrogen fertilizer
During the cultivation of leafy vegetables, foliar spraying of nitrogen fertilizer on vegetables is taboo, because during foliar spraying of nitrogen fertilizer, its ammonium ions, after contacting the air, are very easily converted into acid radical ions and absorbed by the leaves. The growth period of leafy vegetables is generally relatively short, and it is very easy for nitrate to accumulate in the plant. This may also cause human poisoning, so foliar spraying of nitrogen fertilizer is taboo and should be done with caution.
4. Pay attention to the amount of micro-fertilizers used
Applying micro-fertilizers during vegetable growth can promote high quality and high yield in vegetables, but the demand of vegetables for them is extremely low, and they are generally sprayed at low concentrations. Once micro-fertilizers are applied excessively, it will not only cause waste of fertilizer, but also poison the crops and cause environmental pollution. The amount of ferrous sulfate per mu should not exceed 3.5 kg, while the amount of manganese sulfate and manganese chloride per mu should not exceed 2.05 kg, the amount of copper sulfate per mu should not exceed 2 kg, and the amount of borax per mu should not exceed 1.25 kg.
The above is an introduction to which chemical fertilizers should not be applied to vegetables. We hope it can help you. To learn more related knowledge, please stay tuned to us.