JP2008308564A - Soil-activating agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To activate soil by effectively sterilizing harmful microorganisms in an early stage while the microorganisms useful for planting is left to remain in the soil. <P>SOLUTION: The soil-activating agent is obtained by adding 0.5-1 mass% of sodium hydrogencarbonate and 0.01-0.05 mass% of citric acid to an aqueous solution of chlorine dioxide in the concentration of 500-700 ppm. The soil-activating agent is sprinkled over the soil in a ratio of about 2,000-2,500 liters per Tan (about 992 m<SP>2</SP>), and thereby, the microorganisms in the soil can be selectively sterilized, and the soil for planting can be activated in an early stage. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a soil activator, and more particularly, to a soil activator and an activation method for activating soil so that healthy planting can be performed.

In the soil, harmful microorganisms such as filamentous fungi live in addition to microorganisms such as bacteria and actinomycetes effective in plant cultivation.
These microorganisms are closely related to the root system of plants, and inherently, the antagonistic relationship between the above-mentioned effective microorganisms and harmful microorganisms is desirable. Cannot be removed sufficiently.
On the other hand, with strong sterilizing agents such as chlorpicrin and trapecside oil, there was a drawback that even microorganisms effective for planting were removed at the same time. In addition, the sterilization effect has been remarkably reduced due to the resistance of harmful microorganisms, and the environmental pollution and the influence on the human body have become remarkable.
And with the strengthening of regulations accompanying the amendment of the Agricultural Chemicals Control Law in 2006, diseases are becoming more frequent, and problems are growing and complicated from the planting work side.

The present inventor previously provided a method for activating planting soil by spraying a 500 to 700 ppm concentration of chlorine dioxide aqueous solution on the soil at a rate of 2000 to 2500 L per reaction. Has been effective. (Patent Document 1)
In the subsequent stage of dissemination, some of the farmer's fields have soil that has become a hotbed of disease due to soil exhaustion, and when this is used to improve the health of these fields, Although there was resilience, it could not lead to an early solution, and there was no other choice but to gradually improve the soil through continuous use.
Japanese Patent No. 2686591

  From the above-mentioned situation, the present inventor further improved the invention provided earlier, effectively sterilizing harmful microorganisms at an early stage while allowing microorganisms useful for planting to remain in the soil, Can be activated, and the effective microorganisms present in the soil can be rapidly proliferated and activated to maintain and sustain a healthy soil for planting. It is something to be offered.

In the present invention, as a result of various studies and improvements, 0.5 to 1% by mass of sodium hydrogen carbonate is added to an aqueous solution of chlorine dioxide having a concentration of 500 to 700 ppm, and citric acid is further added to 0.01 to 0.05. A soil activator is obtained by adding mass%.
This soil activator can selectively disinfect microorganisms in the soil and activate the soil for planting by spraying on the soil at a rate of 2000 to 2500 liters per counterweight.

  The present invention is a soil activator obtained by adding 0.5 to 1% by mass of sodium bicarbonate and 0.01 to 0.05% by mass of citric acid to an aqueous solution of chlorine dioxide having a concentration of 500 to 700 ppm. And, by spraying this on the soil at a rate of 2000-2500 liters per reaction, the pH value of the soil can be stabilized and the reactivity of chlorine dioxide can be increased, even in fields with poor soil environment, While leaving microorganisms useful for planting in the soil, it is possible to effectively sterilize harmful microorganisms at an early stage and activate the soil, and promptly remove the useful microorganisms present in the soil. By making it grow and activate, it is possible to maintain and maintain a healthy soil for planting. Moreover, this soil activator is harmless to human livestock and can be used safely.

  Chlorine dioxide can be produced by various methods. For example, it can be produced by reacting chlorine gas with sodium chlorite. This chlorine dioxide is very soluble in water and has a strong oxidizing action, but it is safe to use at low concentrations, so it has traditionally been bleaching paper, pulp, oils, starches, flour, and food processing It is widely used as a disinfectant additive, water disinfectant in pools, baths and water purification plants.

The chlorine dioxide is dissolved in water and used in the form of an aqueous solution having a concentration of 500 to 700 ppm. Sodium bicarbonate and citric acid are added to the chlorine dioxide.
The concentration of the sodium hydrogen carbonate to be added is preferably about 0.5 to 1% by mass, and the concentration of citric acid is preferably about 0.01 to 0.05% by mass.
The combined use of sodium hydrogen carbonate and citric acid makes it possible to stabilize the pH value of the soil to about 8.29 to 8.49, which makes the action of chlorine dioxide more effective. It is guessed.

Also, in soil, primary particles, which are the smallest unit of soil particles such as clay, aggregate to form slightly larger secondary particles (micro-aggregates), which further aggregate to form tertiary particles (aggregates). Forming. Useful microorganisms such as bacteria and actinomycetes live in a small pore space with minute aggregates. When plants are planted, they form a symbiotic relationship with plant roots and supply moisture and nutrients from places where roots cannot reach. It is thought to do.
On the other hand, harmful microorganisms such as filamentous fungi are larger than the above-mentioned useful microorganisms, and many of them live in the large pore space between the micro-aggregates.
When observing the results of using the activator of the present invention on such soil, the activator adjusts the pH of the soil, induces oxygen diffusion, and gives priority to harmful microorganisms such as the filamentous fungus. It acts effectively to reduce the density of harmful microorganisms, improve oxygen supply to useful microorganisms, improve the growth activity, and promote the formation of soil aggregates, contributing to the production of good soil. It is thought that.

  To 20 liters of 60,000 ppm chlorine dioxide solution, add water to dilute to 2,000 liters to make 600 ppm chlorine dioxide solution, and 14 kg (0.7 mass%) hydrogen carbonate Sodium and 0.6 kg (0.03% by mass) citric acid were added to obtain a soil activator.

In order to see the performance of the soil activator, the following microorganism culture test was performed.
(Microbial culture test)
The soil before sterilization treatment and the soil activator of the above example were sprayed at a rate of about 2.01 to 2.52 liters per 1 m ^{2 of} soil (about 2000 to 2500 liters per side). The soil after sterilization treatment which was allowed to stand for about 2 weeks until chlorine dioxide almost disappeared was sampled and measured by a dilution plate method.

(Test conditions for bacteria and actinomycetes)
The soil before the sterilization treatment and the soil after the sterilization treatment are collected and stirred well, 10 g each is taken into 90 ml of sterilized water, and shaken for 10 minutes with a reciprocating shaker. This shake shall be the primary dilution (10 times). The primary dilution is thoroughly stirred, 10 g is taken into 90 ml of sterilized water, and the secondary dilution (100 times) is thoroughly stirred, and then repeated until the fifth dilution (100,000 times). Each of the fifth dilutions was cultured in an egg albumin medium at 28 ° C. for 168 hours, and the number of bacteria / actinomycetes per gram of soil was measured. In the measurement of the number of bacteria, since there is a range that can be counted, the dilution concentration was measured in the range of 100,000 times to 1,000,000 times so as to be easily counted.

(Test method for filamentous fungi)
The soil before the sterilization treatment and the soil after the sterilization treatment are collected and subjected to the third dilution (1,000 times) in the same manner as the test conditions for the bacteria and actinomycetes. Each of the third dilutions was cultured in Rose Bengal medium at 28 ° C. for 72 hours, and the number of filamentous fungi per gram of soil was measured. In addition, since there is a range which can be counted in the measurement of the number of bacteria, the dilution concentration was measured in the range of 10 times to 10,000 times so as to be easily counted.

(Test results)
The results of the microorganism culture test are shown in Table 1.

(Discussion)
According to the results of the microbial culture test, the number of bacteria and actinomycetes decreased after soil treatment compared to before soil treatment, but many bacteria and actinomycetes still remained. On the other hand, the number of filamentous fungi has been greatly reduced, the residual amount after treatment is extremely small, and it can be seen that filamentous fungi, which are generally considered harmful to the soil, are effectively reduced.

Claims (2)

A soil activator obtained by adding 0.5 to 1% by mass of sodium hydrogen carbonate and 0.01 to 0.05% by mass of citric acid to an aqueous chlorine dioxide solution having a concentration of 500 to 700 ppm. A soil activator obtained by adding 0.5 to 1% by mass of sodium hydrogen carbonate and 0.01 to 0.05% by mass of citric acid to an aqueous chlorine dioxide solution having a concentration of 500 to 700 ppm is 2000 to 2500 liters per reaction. A method for activating soil for planting, characterized in that microorganisms in the soil are selectively sterilized by spraying on the soil at a ratio of 5%, and the soil is used for planting.