In recent years, the occurrence of soil-borne diseases has been severe, and the death of trees has frequently occurred. The use of lime to treat vegetable growing soil can kill germs in soil, improve soil pH and prevent soil-borne diseases. Such as lime can reduce tomato blight, cabbage root disease and so on. However, the improper use of vegetable farmers in production not only fails to achieve bactericidal effect, but also causes poor growth of vegetables. Therefore, we must remind farmers that when using lime to sterilize vegetable soil, we must pay attention to the following “two bogeys”.

One bogey is to mix lime with fermented and decomposed manure: When some farmers use lime to disinfect soil, they are often used to dig the manure into the soil together with lime. Although this saves time and effort, it is alkaline due to the fact that lime is fermented. When the composted manure is used in combination, it reacts with humic acid in the fertilizer, which not only reduces the use effect of the fertilizer but also weakens the bactericidal effect of the lime. The correct approach is to first dip lime into the soil and apply manure at intervals of 3-4 days. This will reduce the contact between lime and manure and prevent the reduction of bactericidal effect and fertilizer efficiency.

Second, avoid excessive application of lime: Some farmers only know that lime has a bactericidal effect, but do not know how much to use, so to achieve bactericidal effect, the amount used is too large, and some even use more than 500 kg per acre, resulting in soil Alkaline is too high, so that some elements that are easily absorbed by vegetables under neutral and acidic conditions, such as phosphorus, zinc, magnesium, iron, boron, etc., are fixed, which affects the absorption of these nutrient elements by vegetable roots, resulting in poor vegetable growth. The phenomenon of whitening at the growing point occurred. The vegetable farmer should first measure the pH of the soil when disinfecting with lime. If the pH of the soil exceeds 7.5, then it can no longer be disinfected with lime. If the soil pH is less than 7.0, the vegetable grower may not exceed 200 kg per mu. The amount used to prevent the soil pH is too high, affecting the absorption of certain mineral elements in the root system.

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