JPS6097909A - Preparation of soil fungicide - Google Patents

Abstract

PURPOSE:To obtain a soil fungicide suppressing acidic microorganisms as infectious microorganisms, protecting growth of crops, by blending slaked lime as a base with sodium bicarbonate, adding further phenolphthalein so that the pH of soil is always kept alkali. CONSTITUTION:Slake lime as a base is blended with sodium bicarbonate and potassium bicarbonate to make soil alkali and to prevent occurrence of acidic microorganisms, the blend is mixed with boric acid for sterilizing action and pH adjusting action, further with phenolphthalein, to give a soil fungicide capable of observing pH of soil. pH of the soil can be observed by applying the fungicide to soil, dispersing the soil in water, watching color of the supernatant liquid, an application amount of it to soil and supply period to soil can be determined, pH of soil can be always kept alkali, alkaline microorganisms such as ray fungus, etc. are preferentially grown, acidic microorganisms as infectious microorganisms are suppressed, and infectious blights are prevented to aim at sound growth of crops.

Description

[Detailed description of the invention] The present invention relates to a method for producing a soil fungicide.

Traditionally, soil contains acidic bacteria that cause infectious diseases and alkaline bacteria such as actinomycetes that are effective in suppressing acidic bacteria, but soil becomes acidic due to the production of organic acids due to incomplete decomposition of organic matter. Slaked lime and the like have been used as soil fungicides because infectious disease bacteria can easily propagate and have a negative impact on crop growth. How much to spray - 1 - It was difficult to carry out sterilization work because it was not clear at all whether soil sterilization was appropriate or when the soil sterilizer should be replenished.

In the present invention, slaked lime is used as a base, and by mixing sodium bicarbonate, potassium bicarbonate, and boric acid, and further mixing phenolphthalein, a clear liquid is obtained when the soil after spraying is dissolved in water. ±1 depending on color
■Ill H can be confirmed, and the time between spraying and replenishing the soil can be confirmed.'' - Providing a method for producing soil fungicides that can maintain soil pH at an alkaline level at all times and promote the growth of healthy crops. This is what I am trying to do.

A detailed explanation of the present invention is as follows.

That is, slaked lime is used as a base, mixed with sodium bicarbonate, potassium bicarbonate, and boric acid, and further mixed with phenolphthalein. Slaked lime, sodium bicarbonate, and potassium bicarbonate make the soil alkaline and increase Mt.
In addition to preventing the growth of 'l bacteria, boric acid is added to have a bactericidal effect and to adjust pHw4, and phenolphthalein is added to recognize -2-II l-1 in the soil. be.

That is, when phenolphthalein is dissolved in water, IIH9
It turns red depending on the level of pH, and becomes colorless on the acidic side of pH 9 or less, so it is possible to roughly judge whether it is alkaline or acidic.

The embodiment of the present invention is constructed as described above, and the soil fungicide produced as described above is used in the following manner.

Therefore, 15. Spray the soil fungicide on the soil, sample a part of the soil together with the soil fungicide, dissolve it in water, and if the supernatant liquid is colorless, the soil condition is on the acidic side. This was confirmed, and soil fungicides were replenished.
Similarly, samples are taken and dissolved in water, and the sampling and dissolution operations are carried out until the color of the clear liquid turns red. Also,
Even if a soil fungicide is sprayed on the soil, the soil 11 will shift to the acidic side due to the production of organic acids due to the decomposition of organic matter, so it is necessary to sample the soil even when spraying a back-end soil fungicide. If it is dissolved in water, the n I-1 of the soil can be confirmed. In other words, if the supernatant liquid turns red, it indicates that the soil fungicide is not being replenished, and if the supernatant liquid is colorless, it indicates that it is time to replenish the soil fungicide. . By spraying this soil IP fungicide on the soil, it is possible to keep the soil slightly alkaline at all times, giving priority to effective alkaline bacteria such as actinomycetes, suppressing acidic bacteria that are infectious disease bacteria, and preventing infectious diseases. It prevents this and protects the growth of crops.

According to the present invention, slaked lime is used as a base, and bicarbonate of soda, small potassium carbonate, and boric acid are mixed therein, and phenolphthalein is also mixed therein, so that when the soil after spraying is dissolved in water, the supernatant liquid has a color. by soil rl
H, and the timing of spraying, boiling, and replenishing the soil can be confirmed, making the spraying work easier. It also keeps the soil pll alkaline at all times, giving priority to alkaline bacteria such as actinomycetes to prevent infection. It suppresses acidic bacteria as pathogenic bacteria, prevents infectious diseases, and allows for the steady growth of crops.

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Claims (1)

[Claims] 1) A method for producing a soil fungicide, which comprises mixing slaked lime as a base with sodium bicarbonate, potassium bicarbonate, and boric acid, and further mixing phenolphthalein.