JP2008187930A - Rice quality-improving material, rice quality-improving product and rice quality-improving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide rice quality-improving material enabling improvement in rice quality through changing surrounding environment of paddy or rice, to provide a rice quality-improving product, and to provide a rice quality-improving method. <P>SOLUTION: The rice quality-improving material essentially contains wood charcoal. The rice quality-improving product contains the rice quality-improving material. The rice quality-improving method comprises disposing the rice quality-improving material and/or the rice quality-improving product in the growth environment for the paddy and/or the preservation environment for the rice. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rice quality improving material, a rice quality improving product, and a rice quality improving method. Specifically, rice quality improving materials that can improve the quality of rice by being installed in rice vases and rice warehouses, or embedded in rice fields, and rice quality improved products using such rice quality improving materials and It relates to rice quality improvement methods.

  In Japan, rice has been widely popular as a staple food since ancient times, and how to improve the quality of rice is important for both rice production and sales and for consumers who eat rice. It was a very big concern. Therefore, rice quality improvement from various viewpoints such as variety improvement, rice cultivation method, and rice milling method has been tried. However, despite the fact that the quality of rice is greatly affected by the surrounding environment such as climate and soil, in the past, in order to improve the quality of rice, the surrounding environment of rice and rice, such as the growth environment of rice and the preservation environment of rice, has been improved. No attempt has been made to improve the quality of rice by changing it.

  Therefore, the problem to be solved by the present invention is to provide a rice quality improving material, a rice quality improved product, and a rice quality improving method capable of improving the quality of rice by changing the surrounding environment of rice and rice. There is.

  As a result of intensive studies to solve the above problems, the present inventor has found that charcoal may be used as the rice quality improving material. Although the detailed mechanism for improving the quality of rice by charcoal has not yet been elucidated, various functions such as humidity control function, gas adsorption function, electromagnetic function, etc. possessed by charcoal, in particular, some action by electromagnetic function. It is presumed that it may be due to affecting the quality of rice. Furthermore, as a result of the study by the present inventor, it was considered that microorganisms tend to cluster on charcoal having such an electromagnetic function, and that these microorganisms may have improved the surrounding environment of rice and rice by some action. . The present invention has been completed based on such findings.

That is, the rice quality improving material according to the present invention is characterized by requiring charcoal.
The rice quality improvement product concerning this invention is characterized by including the said rice quality improvement material.
The rice quality improving method according to the present invention is characterized in that the rice quality improving material and / or the rice quality improving product are arranged in a rice growth environment and / or a rice storage environment.

  According to the present invention, by improving the quality of rice by a method different from the conventional method of changing rice and the surrounding environment of rice, the level of the quality of all currently distributed rice is raised at once. be able to.

Hereinafter, the rice quality improving material, the rice quality improved product, and the rice quality improving method according to the present invention will be described in detail, but the scope of the present invention is not limited to these descriptions, and the present invention is not limited to the following examples. Changes can be made as appropriate without departing from the spirit of the invention.
[Rice quality improvement material]
The rice quality improving material according to the present invention includes charcoal.
<Charcoal>
The charcoal is not particularly limited, and examples thereof include activated charcoal, Bincho charcoal, bamboo charcoal, and the like. Particularly, when activated charcoal is used, a remarkable effect of improving rice quality is exhibited, which is preferable.

  The activated charcoal can be obtained by low-temperature carbonizing a piece of wood, i.e., a wood chip, followed by high-temperature carbonization and then activating by contacting with water. Although the raw wood of the wood chip is not particularly limited, for example, softwood materials such as cedar, Himalayan cedar, and red pine are used, and red pine is particularly preferable. It is possible to use thin wood and waste materials that are difficult to use as wood products and inexpensive. Wood chip products that are industrially produced in large quantities can also be used as raw materials for pulp production and board building materials. The shape and size of the wood chip are not particularly limited, but when the passing diameter of the wood chip is measured, the maximum diameter is preferably 10 to 60 mm. Wood chips that are too large are difficult to carbonize sufficiently, and wood chips that are too small are difficult to handle and have poor production yields.

In the low-temperature carbonization step and the high-temperature carbonization step for obtaining the activated charcoal, basically, an ordinary charcoal production apparatus and production processing conditions may be employed.
Although it does not specifically limit in the said low temperature carbonization process, For example, the temperature of heat processing can be set to 450-550 degreeC. In addition, the heat treatment time may be such that the whole wood chip is sufficiently carbonized, and it usually takes 100 to 120 hours, although it varies depending on the conditions of the wood chip or the manufacturing apparatus. The heat treatment atmosphere is performed in a state where the inflow of air is blocked. It can be treated with wood chips covered with fir shells and sawdust.
Although it does not specifically limit in the said high temperature carbonization process, For example, the temperature of heat processing can be set to 800-900 degreeC, Preferably heat processing time is 3 to 60 minutes, More preferably, it can set to 5 to 15 minutes. In the high-temperature carbonization step, only a portion close to the surface of the wood chip carbide that has been low-temperature carbonized in the previous step is high-temperature carbonized, and the low-temperature carbonization portion is left in the central portion of the wood chip carbide. The ratio of the high temperature carbonization part and the low temperature carbonization part contained in the activated charcoal obtained is adjusted by processing time. If the treatment time is too short or too long, the respective characteristics of the high temperature carbonized portion and the low temperature carbonized portion cannot be sufficiently exhibited. It is preferable that the wood chip carbide that has been low-temperature carbonized is carbonized as it is by high-temperature carbonization by increasing the heat treatment temperature in the same apparatus as the low-temperature carbonization step. The heat treatment atmosphere is in a state where oxygen is supplied.

When water is brought into contact with the carbide that has been heat-treated in the high-temperature carbonization process, the carbide is rapidly cooled and extinguished. At that time, activation is performed by chemical and physical action of water such that fine pores having a complicated shape are formed in the carbide, or the surface of the carbide is modified to improve the adsorption ability. Although water may be in a liquid state, it usually comes into contact with the carbide in a water vapor state. The specific treatment apparatus and treatment conditions of the activation step may be the same as the contact treatment with water that is performed in a known activated carbon production technique.
The activated charcoal obtained in this way has a porous structure with a large number of micropores inside, and has a physical adsorption action by the micropores, and the surface of the micropores is chemically or physically active. It has a high adsorption capacity. As can be seen from the above production method, activated charcoal does not require the use of additives or activation treatment agents other than wood chips as raw materials.

Activated charcoal is excellent in adsorptive capacity, and is excellent in moisture absorption / desorption, deodorization, mildew resistance, far-infrared radiation, conductivity, electromagnetic wave absorption, ion adjustment function, and the like. The activated charcoal adsorbing ability has a large rising speed when it comes into contact with the adsorbing substance. Moreover, since it has the effect | action which decomposes | disassembles an adsorbent substance, it can prevent that an adsorbent substance clogs into the micropore of activated charcoal, and adsorbability falls, and can exhibit stable adsorbability over a long period of time.
The activated charcoal contains a mixture of a low temperature carbonized portion carbonized in the low temperature carbonization step and a high temperature carbonized portion further carbonized in the high temperature carbonization step. Usually, there is a low-temperature carbonized portion on the center side and a high-temperature carbonized portion on the outer peripheral side. The activated charcoal can synergistically exhibit the functions and roles of the low temperature carbonized portion and the high temperature carbonized portion.

By pulverizing the activated charcoal into activated charcoal powder, it becomes easy to carry or support other materials.
As the pulverizing apparatus and pulverizing conditions, a normal charcoal powder manufacturing technique can be applied.
The activated charcoal powder is preferably pulverized to a particle size of 5 mm or less. The smaller the particle size, the larger the surface area per unit weight and the various properties based on the surface properties are improved.
As described above, the activated charcoal powder obtained by pulverizing the activated charcoal in which the low-temperature carbonized portion and the high-temperature carbonized portion coexist also contains the low-temperature carbonized portion and the high-temperature carbonized portion. It is preferable that each activated charcoal has a low-temperature carbonized portion and a high-temperature carbonized portion, but the activated charcoal powder composed of the low-temperature carbonized portion and the activated charcoal powder composed of the high-temperature carbonized portion may be uniformly dispersed. .

The charcoal used in the present invention is preferably charged in advance. By charging in advance, the rice quality improvement effect is also improved. This is considered to be due to the fact that the electromagnetic action of charcoal is improved by charging, and that microorganisms easily gather on the charcoal, thereby improving the action of the microorganism.
The method for charging the charcoal is not particularly limited. For example, there is a method in which an electrostatic field is generated by applying a voltage, and the charcoal is left in the electrostatic field for one day. At this time, the charcoal is placed on an insulated base so that the electric charge in the charcoal is not conducted to the outside. Although it is preferable to apply a high voltage and it is not necessarily limited, it can be set to 50-150V, for example.

<Other materials>
As the rice quality improving material according to the present invention, materials other than charcoal can be used within a range not including the effects of the present invention. Such materials other than charcoal are not particularly limited, but include, for example, coke (particularly pitch coke, high temperature calcined coke), ferrite, calcined mineral, natural salt, wave mineral (crystal, shawl tourmaline, amatite, Black silica, apatite, barley stone, etc.), coal, graphite, artificial graphite, carbon fiber, wood vinegar, bamboo vinegar, EM fungus, and the like can be used.
As the other material, preferably, pitch coke is used, more preferably ferrite is used, still more preferably a calcined inorganic material is used, particularly preferably natural salt, crystal, shawl tourmaline, amaterite, black silica, apatite and barley stone. At least one selected from the group consisting of By using these other materials in combination with charcoal, the rice quality improvement effect is synergistically improved. As mentioned earlier, the improvement effect of rice quality exhibited by charcoal may be an effect based on various functions such as humidity control function, gas adsorption function, electromagnetic function, etc., especially based on electromagnetic function. As is expected, pitch coke is excellent in the electromagnetic environment improvement effect as disclosed in Japanese Patent Application Laid-Open No. 2005-305126 filed earlier by the present inventor. Increase the function of coke. Further, as a result of further research by the present inventor, ferrite is also excellent in the electromagnetic environment improvement effect, and the above-mentioned natural salt, crystal, shawl tourmaline, amaterite, black silica, apatite, barley stone, etc. are further improved. It has been found that this contributes to the improvement of the electromagnetic environment improvement function. In this way, in addition to charcoal, the above-mentioned various materials are used in combination to synergistically improve the electromagnetic environment improvement effect, thereby improving the rice quality improvement effect synergistically. Inferred.

  The pitch coke is manufactured using a pitch obtained by distilling coal tar or coal as a raw material. Pitch coke is mainly composed of carbon and has the same characteristics as charcoal as an environmental improvement function. In particular, pitch coke having a carbon ratio of 98% or more has very high electrical conductivity, and has the same or higher characteristics as charcoal. Pitch coke is harder, stronger, and has a higher specific gravity than charcoal, so it has a high loading capacity when used under the ground, making it difficult to collapse or deform. In particular, a pitch coke having a hardness of 5.1 kg or more has a significantly improved loading capacity compared to charcoal. Pitch coke is also preferable because it can be obtained at low cost. Those having an average particle size of 0.5 to 2 mm are easy to handle and exhibit an excellent electromagnetic function.

The ferrite is a group of iron oxides having a composition of MO · Fe ₂ O ₃ and is an excellent magnetic material. M is a divalent metal ion, such as Mn ²⁺ , Fe ²⁺ , Co ²⁺ , Ni ²⁺ , Cu ²⁺ , Zn ²⁺ , and the like. It can be obtained by mixing metal oxide and iron oxide powders, compression molding and firing. M is not limited to one type, and two or more types may be mixed and mixed to form a solid solution, thereby generating various magnetization characteristics.
For example, it can be used as a powder having an average particle size of 100 μm or less.
The said calcination inorganic substance is an inorganic substance obtained by baking a raw material, exists around other materials, and improves those functions. The fired inorganic substance itself may not have an electromagnetic function, but it is more preferable to use the one having the electromagnetic function because the effect of the present invention can be enhanced. As the material of the fired inorganic material, for example, ceramic or glass obtained by firing natural raw materials such as minerals and viscosity is used. The raw material containing an organic substance and an inorganic substance may be baked to leave only the inorganic substance. The firing temperature of the fired inorganic material is preferably higher, specifically, 800 ° C. or higher. The inorganic material fired at high temperature can achieve a synergistic improvement in function without impairing the functions of other materials.

More specifically, for example, fly ash obtained as waste from a thermal power plant can be used as the fired inorganic substance. Among the charcoal generated during coal combustion, it is fine granular ash that is discharged in a suspended state in the combustion gas and collected by a dust collector or the like.
As a commercial item of the said calcination inorganic substance, a brand name "AZP" (Rasa Kogyo company make, phosphoric acid ester product, chemical name: Euler acid phosphate) is mentioned, for example. The trade name “Ionide” (manufactured by Showa Denki Glass Co., Ltd., glass material) can also be used. This substance has a function of emitting negative ions and far infrared rays.
As the fired inorganic material, for example, those having an average particle size of 30 μm or less can be used.

<Composition of rice quality improving material>
The composition of the rice quality improving material according to the present invention is not particularly limited. For example, charcoal (a mixture of charcoal, pitch coke, and calcined inorganic when it further contains pitch coke and / or calcined inorganic) 30 to 70 It is preferable to mix ferrite in a proportion of 30 to 70 parts by weight with respect to parts by weight. Furthermore, when it is set as the mixture which consists of charcoal, pitch coke, and a calcinated inorganic substance, it is more preferable to make the ratio of each material into charcoal 29-70 weight%, pitch coke 29-70 weight%, and calcinated inorganic substance 1-5 weight%. preferable.
[Rice quality improvement product]
The rice quality improving product according to the present invention is manufactured by filling the rice quality improving material of the present invention described above as a material and filling or molding the rice quality improving material.

Specifically, if the powdery rice quality improving material is accommodated in a breathable packaging container, it is easy to handle and carry and the appearance is improved. If a breathable bag made of cloth or nonwoven fabric is used as the packaging container, it is easy to manufacture and easy to handle. A container made of a synthetic resin molded product having a fine hole on the outer wall, a paper box, a paper tube, or the like can also be used.
The rice quality improvement material contained in the packaging container is, for example, embedded in a rice field to change the growth environment of rice, or installed in a rice bin or a rice warehouse to change the storage environment of rice, Rice quality can be improved. As the packaging bag, a cloth bag knitted with synthetic fiber or natural fiber or a bag made of non-woven fabric can be used. Specifically, hemp bags can be used.

A grain-like rice quality improving material can be blended in a molding material, and the molding material can be molded and cured to obtain a rice quality improving product. The molding material can contain a hydraulic material such as cement or an inorganic binder together with an appropriate amount of water, or a thermoplastic / thermosetting synthetic resin. Examples of the molding method include press molding and extrusion molding. As molded articles, sheet materials, board materials, block materials, pipe materials, as well as figurines, daily necessities, and other more complicated three-dimensional structures can be obtained. Products with the same shape and structure as general cement building materials and ceramic building materials can be manufactured. It can also be applied to foamed resin molding.
In this case, for example, when molding is performed using a press mold for producing briquettes, a briquette-shaped rice quality improved product is obtained. A rice quality improvement product made of a briquette-like molded product has a cylindrical shape as a whole, and is provided with a number of holes penetrating in the direction of the central axis of the circle. By having such a large number of through-holes, the surface area increases, and the rice quality improving function by contact with air or water in the environment can be efficiently exhibited.

As a compounding of a molding material for producing a molded product of a rice quality improving material, a hydraulic inorganic binder such as cement is added in an amount of 5 to 60 parts by weight per 100 parts by weight of the rice quality improving material. Can do. Furthermore, water can be mix | blended in the range of 20-50 weight part with respect to 100 weight part of mixtures of a rice quality improvement material and an inorganic type binder. Also when using a resin binder, the compounding quantity of the same grade as an inorganic type binder can be employ | adopted. If the proportion of the rice quality improving material in the molding material is too small, the intended function cannot be sufficiently exhibited. If the amount of the binder is too small, molding cannot be performed well or the strength of the molded product is reduced.
Of the molded products, sheet materials and board materials can be used as building materials. Improves the quality of rice existing in the space adjacent to walls, ceilings, floors, etc. where construction materials are constructed. The same applies to figurines, daily necessities, and other molded articles. Wrapping the rice with sheet material can improve the quality of the rice inside.

As the sheet material, the powder of the rice quality improving material can be supported or coated on a nonwoven fabric, a knitted fabric, paper, or the like. If an adhesive layer is provided on the back surface of the sheet material, it can be easily attached to a device or apparatus for installing the rice quality improving material.
[Use of rice quality improvement materials and products]
The use of the rice quality improving material and its product according to the present invention will be described below.
The rice quality can be improved by arranging the rice quality improver and its products. As described above, if the charcoal is charged in advance and the charcoal improving material or product including the charcoal is used, the rice quality improving effect is improved. Further, the rice quality improving material and its product are used in the growth environment of rice and / or in the preservation environment of rice, particularly near the rice and rice, specifically, for example, within 1 m around the rice or rice, more preferably When it is placed within 0.5 m, a remarkable rice quality improvement effect is exhibited.

Regarding arrangement | positioning of a rice quality improvement material and its product, as mentioned above, for example, it can arrange | position in the state exposed as a figurine, it can embed in a wall, or can embed and arrange | position in the ground.
Specifically, for example, as in the rice quality improvement method shown in FIG. 1, there is a method in which the rice quality improving material 10 is embedded in the rice field 20 to improve the growth environment of rice. Rice is grown on the rice quality improver 10 buried in the ground 30. A rice quality improving material 10 may be used by filling a packaging bag or the like with a rice quality improving material. In the figure, 31 represents backfill soil. A method for improving the storage environment of rice, such as the rice quality improvement method shown in FIGS. In the method of FIG. 2, the rice quality improving material 10 is filled in a packaging bag or the like to obtain the rice quality improving product 10, which is placed in the rice bottle 40, and the rice 50 is stored on the rice quality improving product 10. Thus, rice quality can be improved easily. In the method of FIG. 3, for a rice warehouse 60 for storing rice 50, a sheet containing rice quality improving material between the inner layer 61 and the outer layer 62 of the wall of the rice warehouse or between the upper layer 63 and the lower layer 64 of the floor. A rice quality-improved product 10 in the form of a board or board is embedded. Although not shown, for example, in FIG. 2, the sheet-like or board-like rice quality-improved product 10 containing the rice quality-improving material can be embedded in the interior of the rice bottle 40. In FIG. The rice quality-improved product 10 obtained by filling a packaging bag or the like may be placed in the rice warehouse 60 or embedded in the ground below the rice warehouse 60.

The method for embedding in the rice field or the like is not particularly limited, but is performed as follows, for example.
Drill holes in the ground to bury rice quality improvement materials and products. It does not specifically limit as a digging method, A hand digging may be used and you may carry out using a machine. The shape of a hole is not specifically limited, For example, shapes, such as a cylinder and a rectangular parallelepiped, are mentioned. About the dimension of a hole, although it changes also with kinds of the rice quality improvement material to be used, for example, if it is cylindrical, a diameter of 1.5-2.0 m, a depth of 1.5-2.0 m, if it is a rectangular parallelepiped, The length can be 1.0 to 2.0 m, the width is 1.0 to 2.0 m, and the depth is 1.5 to 2.0 m.

After excavation, put rice quality improvement material and its product into the created hole. The input amount of the rice quality improving material and its product varies depending on the type of the rice quality improving material and its product to be used, but can be 120 to 200 kg, for example.
When materials other than charcoal are used, it is preferable to input each material as follows. That is, first, materials such as coke, ferrite, calcined inorganic material, coal, graphite, artificial graphite, and carbon fiber are uniformly mixed with charcoal in advance with a kneader, etc., and then a cloth bag woven with synthetic fiber or natural fiber, or non-woven fabric The bag is filled with a bag or the like, and is then filled with water, preferably with water, and then composed of natural salt, crystal, shawl tourmaline, amatite, black silica, apatite, and barley stone. At least one material selected from the group is added. Furthermore, when a wood vinegar solution, a bamboo vinegar solution, an EM fungus or the like is added, the effect of the present invention is further enhanced.

After putting each material, the soil dug up is returned, and the rice quality improvement material and its burying are completed.
If such burial work is performed over a plurality of locations, a further improvement effect of rice quality is exhibited.
[Usage of rice quality improvement materials and their products]
The rice quality improving material and its product according to the present invention can be used for improving the quality of rice. Although not particularly limited, for example, in the rice growth stage, it is buried in the ground under rice fields or rice warehouses, and in the rice distribution stage, it is mixed as a material in a rice packaging container. At the preservation stage, the quality of the rice can be improved by embedding it in the walls and floors of the rice warehouse, mixing it as a material in the box itself, or arranging it as a figurine in the rice warehouse or the rice bin. It can be used to improve.

Hereinafter, the rice quality improving material, the rice quality improved product, and the rice quality improving method of the present invention will be described more specifically by way of examples, but the present invention is not limited thereto.
The method for measuring rice quality in Examples is shown below.
<Measurement of rice quality>
Using rice cooking taste meter STA1A (manufactured by Satake Co., Ltd.), the appearance, hardness, stickiness, balance, and taste of the rice after milling were measured.
Appearance, stickiness, and balance are each evaluated on a 10-point scale, and the hardness is an evaluation standard that the lower the score is, the softer the score is, and the higher the hardness, the harder the score. The taste value is evaluated on a 100-point scale as their comprehensive evaluation. General guidelines are shown below.

Regarding appearance, stickiness and balance, less than 3.5 points is bad, 3.5 points or more and less than 5.0 points is slightly bad, 5.0 points or more and less than 6.5 points are normal, 6.5 points or more and 8. A score of less than 0 is good, and a score of 8.0 or more is good.
Regarding hardness, softness is less than 3.5 points, softness is more than 3.5 points and less than 5.0 points, good is more than 5.0 points and less than 6.5 points, is more than 6.5 points and less than 8.0 points Slightly hard, harder than 8.0 points.
As for the taste value, less than 50 points is bad, 50 points to less than 60 points is somewhat bad, 60 points to less than 70 points are normal, 70 points to less than 80 points are slightly good, and 80 points or more are good.

[Rice quality improvement material]
<Rice quality improvement material a>
After kneading 10% by weight of activated charcoal with an average particle size of 1.0 mm, 85% by weight of pitch coke with an average particle size of 2.0 mm and 5% by weight of fly ash with an average particle size of 30 μm, a mixture was obtained. Then, 30 parts by weight of ferrite having an average particle diameter of 100 μm was added to 70 parts by weight of the mixture, and kneaded with a kneader to obtain a rice quality improving material a. The activated charcoal used at this time was charged by being left standing for one day in an electrostatic field generated by applying a voltage of 100V. The charging was performed in a state where the activated charcoal was placed on a 2 m wide and 4 m long gantry (the gantry is in an insulating state) so that the electric charge in the activated charcoal was not conducted to the outside. The strength of the voltage was 100V.

<Rice quality improvement material b>
It is a commercial product “Magical Tanso” (trade name, manufactured by Hinomaru Carbo Techno). Pitch coke grains having an average particle diameter of 2.0 mm, a carbon ratio of 90%, and a hardness of 5.3 kg, powdered Bincho charcoal having a particle diameter of 2.0 mm or less, and iron oxide powder are included. Pitch coke grains: powder Bincho charcoal: iron oxide powder = 7: 3: 0.2.
<Rice quality improvement material c>
Commercially available Kishu Bincho charcoal available on the market was used as the rice quality improvement material c.
<Rice quality improvement material d>
Activated charcoal having an average particle size of 1.0 mm was used as the rice quality improving material d. The activated charcoal used was charged in advance in the same manner as the rice quality improving material a.

<Rice quality improvement material e>
A rice quality improving material e was obtained by kneading 95 parts by weight of activated charcoal having an average particle size of 1.0 mm and 5 parts by weight of Amaterishi with a kneader. The activated charcoal used was charged in advance in the same manner as the rice quality improving material a.
[Test Example 1]
The performance of each rice quality improvement material ae was tested.
Specifically, Koshihikari (variety name) and Kinuhikari (variety name) blended rice (produced in Tokushima) was cultivated from rice planting in June to harvesting in October with rice quality improvement material a buried in the rice field, The harvested rice was polished and its quality was evaluated by the method described below. The burial of rice quality improvement material was excavated after excavating the ground to make a hole 1.5m long, 1.5m wide and 1.5m deep, and 120kg of the rice quality improvement material was put there. The soil was returned and buried in two places per ha so that the effect of the rice quality improving material was evenly exhibited throughout the rice field.

A similar test was performed on the rice quality improving materials b to e.
The results are shown in Table 1. For comparison, Table 1 shows the results of measuring the appearance, hardness, stickiness, balance, and taste of polished rice from Tokushima (Kokuhihikari (variety name) and Kinuhikari (variety name)). Yes.

[Test Example 2]
In order to confirm the reproducibility of the performance of the rice quality improving material, the quality of the rice was improved after improving the rice quality using the same rice quality improving material a in multiple places for the same variety (Koshihikari). Evaluation was made by the method described later.
Specifically, rice (variety name: Koshihikari) is cultivated in the A district of Aichi Prefecture from rice planting in June to harvesting in October with the rice quality improvement material a buried in the rice field, after harvesting The rice quality was evaluated by the evaluation method described later. The burial of rice quality improvement material was excavated after excavating the ground to make a hole 1.5m long, 1.5m wide and 1.5m deep, and 120kg of the rice quality improvement material was put there. The soil was returned and buried in two places per ha so that the effect of the rice quality improving material was evenly exhibited throughout the rice field.

The same test was conducted in A district, B district, C district, and D district.
The results are shown in Table 2. For comparison, Table 2 shows the results of measuring the appearance, hardness, stickiness, balance, and taste of polished Koshihikari rice from Uonuma, Niigata Prefecture, which had the highest evaluation in FY2005. .

[Evaluation]
(1) From Table 1, it can be seen that even if any rice quality improving material is used, it is possible to obtain excellent rice in all evaluation items from rice not using the rice quality improving material. . In particular, the rice quality improvement effect of the rice quality improvement material a using activated charcoal, pitch coke, fly ash, and ferrite is remarkable.
(2) From Table 2, it can be seen that the rice quality improving material of the present invention stably exhibits the rice quality improving effect. Moreover, in all the test examples, it turns out that all the evaluation items exceed the Koshihikari from Uonuma having the highest quality in 2005, which is given as a comparison. Thus, according to the present invention, the rice quality is improved to a level higher than that of rice, which has been regarded as the highest level in the past, by a simple method of arranging the rice quality improving material near the rice. Can do it.

  The rice quality improving material, the rice quality improved product, and the rice quality improving method according to the present invention can be suitably used as, for example, a material, product, and method that can improve the rice quality by a method different from the conventional method.

It is a simplification figure showing the rice quality improvement method concerning the present invention. It is a simplification figure showing the rice quality improvement method concerning the present invention. It is a simplification figure showing the rice quality improvement method concerning the present invention.

Explanation of symbols

10 Rice quality improvement material, rice quality improvement product 20 Rice field 30 Underground 31 Backfill soil 40 Rice vat 50 Rice 60 Rice warehouse 61 Wall inner layer 62 Wall outer layer 63 Floor upper layer 64 Floor lower layer

Claims (13)

  Rice quality improving material that requires charcoal.   The rice quality improving material according to claim 1, wherein the charcoal is activated charcoal obtained by carbonizing a wood chip at a low temperature and then carbonizing the wood chip at a high temperature and then activating it by contacting with water.   The rice quality improving material according to claim 1 or 2, which also contains pitch coke.   The rice quality improving material according to any one of claims 1 to 3, further comprising ferrite.   The rice quality improving material according to any one of claims 1 to 4, wherein the rice quality improving material also includes a fired inorganic substance. The rice quality improvement product containing the rice quality improvement material in any one of Claim 1-5.   A method for improving rice quality, comprising arranging the rice quality improving material and / or the rice quality improved product according to any one of claims 1 to 6 in a rice growth environment and / or a rice storage environment.   The rice quality improvement method according to claim 7, wherein the arrangement is embedded.   In the hole embedded in the ground, the rice quality improving material and / or the rice quality improving product and water are introduced, and further, natural salt, crystal, shawl tourmaline, amaterite, black silica, apatite The method for improving rice quality according to claim 8, wherein at least one selected from the group consisting of wheat and barley stone is added to refill the hole.   The rice quality improvement method according to claim 8 or 9, wherein the burying is burying in a rice field.   The method for improving rice quality according to claim 7, wherein the arrangement is placing in a rice bin and / or embedding in a rice bin.   The method for improving rice quality according to claim 7, wherein the arrangement is placing in a rice warehouse and / or embedding in at least one of a ceiling, a floor and a wall of the rice warehouse.   The method for improving rice quality according to any one of claims 7 to 12, wherein charcoal contained in the rice quality improving material and / or rice quality improving product is charged in advance.

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