JP2003116349A - Apparatus and method for optical soil amelioration and plant growth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soil ameliorator that can effectively ameliorate soil in without the need for complicated operations, for example, the direct radiation of sun light and solar heat or the direct soil heating. SOLUTION: The soil ameliorator comprises lenses 1 for condensing sun light S, band pass filters 2 allowing only ultraviolet (UV) rays of 200-400 nm wavelength to pass therethrough from the sun light S condensed by the lenses 1, and optical fibers 3 of which one ends are buried in the soil and radiate the inside of the soil with the UV rays passing through the filter 2 from the one end.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention improves soil by killing microorganisms in soil that are harmful to plants before sowing seeds or after sowing the seeds, and further,
The present invention relates to a soil reforming apparatus, a soil reforming / plant growing apparatus, a soil reforming method, and a soil reforming / plant growing method for promoting the growth of a plant after the plant has germinated.

[0002]

2. Description of the Related Art Various conditions are required for seeds to be sown in the soil, to germinate and to be sufficiently grown as plants. The most basic of these various conditions is as follows.

The first condition is to remove beforehand microorganisms in soil which are harmful to the growth of plants.

The second condition is that microorganisms such as mycorrhizal fungi necessary for growing plants are propagated in the soil.

The third condition is to provide the germinated plant with light having a wavelength suitable for photosynthesis.

The soil before planting seeds contains microorganisms unsuitable for growing plants. Conventionally, in order to remove these microorganisms, that is, in order to satisfy the first condition described above, irradiation with sunlight or solar heat, or,
Techniques have been used to kill those microorganisms by heating the soil directly.

Further, in order to satisfy the above-mentioned second condition, conventionally, charcoal or the like is mixed in the soil and mycorrhizal fungi are propagated, so that suitable growing conditions for seeds sown in the soil. Have been used to improve the growth of plants.

For plants, not all wavelengths of sunlight are suitable for photosynthesis. Therefore, in order to satisfy the above-mentioned third condition, conventionally, a method of giving indirect light has been used in the process of plant growth.

[0009]

However, the direct irradiation of sunlight / solar heat or the direct heating of soil, which has been conventionally performed to satisfy the first condition described above, is complicated, but the microorganisms The effect of killing was not great. In particular, even if the soil is directly irradiated with the sunlight, the ultraviolet rays obtained from the sunlight, which are necessary for the removal of microorganisms, do not enter the soil and are mostly reflected on the ground surface, or are backscattered. I was sick.

In order to satisfy the above-mentioned second condition, even if the mycorrhizal fungus is mixed in the soil, the mycorrhizal fungus does not always grow sufficiently even if it is simply mixed, and the plant is sufficiently It was not always possible to train them.

Further, in order to satisfy the above-mentioned second condition, even if the plant is irradiated with indirect light, it is not always possible to irradiate the plant with sunlight having an appropriate wavelength.

The present invention has been made in view of the above problems, and effectively reforms the soil without complicated operations such as direct irradiation of sunlight and solar heat or direct heating of the soil. An object of the present invention is to provide an apparatus and a method capable of growing a plant.

[0013]

To achieve this object, in a first aspect of the present invention, a lens for condensing sunlight and a sunlight condensed by the lens are used to
A bandpass filter that allows only ultraviolet rays having a wavelength of 0 to 400 nm to pass therethrough, and an optical fiber that has one end buried in the soil and irradiates the light that has passed through the bandpass filter into the soil from the one end. A soil reforming device is provided.

The soil reforming apparatus is an apparatus used in an environment where sunlight can be obtained, and further used before sowing seeds in soil.

Most of the ultraviolet rays obtained from sunlight are reflected on the surface of the earth or backscattered, so that they cannot enter the soil. On the other hand, according to the soil reforming apparatus of the present invention, the bandpass filter has 20% of the sunlight collected by the lens.
Only light having a wavelength of 0 to 400 nm is transmitted, and this light is applied to the soil through the optical fiber. Here, the light having a wavelength of 200 to 400 nm is light belonging to the ultraviolet range.

As described above, according to the soil reforming apparatus of the present invention, ultraviolet rays having a bactericidal effect can be surely introduced into the soil, and microorganisms harmful to plants in the soil in which seeds are to be planted can be reliably ensured. Can be removed.

By embedding titanium oxide or charcoal in the soil, it is possible to double the bactericidal effect.

As a second aspect of the present invention, a lens for condensing sunlight and a bandpass filter for passing only infrared rays having a wavelength of 1400 nm to 20 μm from the sunlight condensed by the lens. And an optical fiber having one end buried in the soil and irradiating the light passing through the bandpass filter into the soil from the one end.

The soil reforming apparatus is an apparatus used in an environment where sunlight can be obtained.

According to the soil reforming apparatus of the present invention, the bandpass filter allows only light having a wavelength of 1400 nm to 20 μm to pass through the sunlight collected by the lens, and the light passes through the optical fiber. Is irradiated into the soil. Here, the light having a wavelength of 1400 nm to 20 μm is light belonging to the infrared range.

For example, after sterilizing the soil by the above-mentioned soil reforming apparatus, mycorrhizal fungi are planted together with seeds in the sterilized soil, and the above-mentioned light belonging to infrared rays is applied to the mycorrhizal fungi and the seeds through an optical fiber. Irradiate into the soil. This can promote the growth of mycorrhizal fungi and promote the growth of seed roots.

Further, as a third aspect of the present invention, a lens for concentrating sunlight and only sunlight having a wavelength of 600 nm to 700 nm are transmitted from the sunlight condensed by the lens to germinate. Provided is a plant growing device including a bandpass filter for irradiating plants on the ground surface.

The soil reforming apparatus is an apparatus used in an environment where sunlight can be obtained.

According to the analysis of photon flux density, photosynthesis is
There is a peak in the absorption wavelength of chlorophyll for light having a wavelength of 600 to 700 nm, and when irradiated with light of this wavelength, carbohydrates are most actively produced. Since sunlight has a wide range of wavelengths from far infrared rays to radiation, in order for plants to perform efficient photosynthesis, sunlight is condensed by a lens and a bandpass filter is used.
From the collected light, only light having a wavelength of 600 to 700 nm is collected and applied to the plant. As a result, photosynthesis of the germinating plant can be promoted, which in turn can promote the growth of the plant.

As a fourth aspect, the present invention is a soil reforming apparatus used for soil not exposed to sunlight, which comprises a light source that emits ultraviolet rays having a wavelength of 200 to 400 nm, and A soil reforming apparatus comprising: a lens that collects the emitted ultraviolet light; and an optical fiber that has one end embedded in the soil and that irradiates the ultraviolet light collected by the lens into the soil from the one end. provide.

This soil reforming apparatus is an apparatus used in an environment where sunlight cannot be obtained, and is also an apparatus used before sowing seeds in soil.

Since sunlight cannot be obtained in the environment in which this apparatus is used, a light source that emits ultraviolet rays equivalent to sunlight is used instead of sunlight. This makes the first
It is possible to obtain the same effect as that of the soil reforming apparatus according to this aspect.

As the light source, for example, a light emitting diode (LED) or a semiconductor laser can be used.

As a fifth aspect of the present invention, there is provided a soil reforming apparatus used for soil not exposed to sunlight,
A light source that emits infrared light having a wavelength of 1400 nm to 20 μm, a lens that collects the infrared light emitted from the light source, one end of which is embedded in soil, and the infrared light that is collected by the lens is Provided is a soil reforming device comprising an optical fiber which irradiates the soil from one end.

This soil reforming apparatus is an apparatus used in an environment where sunlight cannot be obtained.

Since sunlight cannot be obtained in the environment in which this device is used, a light source that emits infrared rays equivalent to sunlight is used instead of sunlight. This allows the second
It is possible to obtain the same effect as that of the soil reforming apparatus according to this aspect.

As a sixth aspect of the present invention, there is provided a plant growing device used for soil not exposed to sunlight.
Provided is a plant growing device including a light source that emits light having a wavelength of 600 nm to 700 nm, and a lens that collects the light emitted from the light source and irradiates the germinated ground surface plant with the lens.

This soil reforming apparatus is an apparatus used in an environment where sunlight cannot be obtained.

Since sunlight cannot be obtained in the environment in which this apparatus is used, a light source that emits light equivalent to sunlight is used instead of sunlight. Thereby, an effect equivalent to that of the soil reforming apparatus according to the third aspect can be obtained.

The amount of the photon flux density is made equal to the amount of the photon flux density of the light condensed by the sunlight to promote sterilization of soil and growth of seeds and mycorrhizal fungi.

The soil reforming or plant growing devices according to the above-mentioned first to sixth aspects may be used alone or in combination with each other.
For example, as described in the embodiment described later, the second
The soil reforming apparatus according to this aspect and the plant growing apparatus according to the third aspect can be used in combination.

As a seventh aspect of the present invention, the first step of concentrating sunlight, and only the ultraviolet rays having a wavelength of 200 to 400 nm are transmitted from the sunlight collected in the first step. And a third step of irradiating the light passing through in the second step into the soil from the one end through a bandpass filter having one end buried in the soil. Provided is a soil reforming method.

According to this soil reforming method, it is possible to obtain the same effects as those of the soil reforming apparatus according to the first aspect described above.

As an eighth aspect of the present invention, the first step of concentrating sunlight, and only the infrared rays having a wavelength of 1400 nm to 20 μm pass from the sunlight collected in the first step. And a third step of irradiating the soil that has passed through the second step with the light passing through the second step through an optical fiber whose one end is buried in the soil. Provide quality method.

According to this soil reforming method, it is possible to obtain the same effect as that of the soil reforming apparatus according to the second aspect.

As a ninth aspect of the present invention, the first process of concentrating sunlight, and only the light having a wavelength of 600 nm to 700 nm is transmitted from the sunlight collected in the first process. And a second step of irradiating a germinating ground surface plant with a second step.

According to this plant growing method, it is possible to obtain the same effect as that of the plant growing device according to the third aspect.

As a tenth aspect of the present invention, there is provided a soil reforming method for soil which is not irradiated with sunlight.
A first step of emitting ultraviolet rays having a wavelength of 200 to 400 nm, a second step of collecting the ultraviolet rays emitted in the first step, and an optical fiber having one end buried in the soil And a third step of irradiating the soil with the ultraviolet rays collected in the second step from the one end.

According to this soil reforming method, it is possible to obtain the same effect as that of the soil reforming apparatus according to the above-mentioned fourth aspect.

The eleventh aspect of the present invention is a soil reforming method for soil not irradiated with sunlight.
A first step of emitting infrared rays having a wavelength of 1400 nm to 20 μm, a second step of collecting the infrared rays emitted in the first step, and an optical fiber having one end buried in the soil are used. And a third step of irradiating the soil with the infrared light collected in the second step from the one end thereof.

According to this soil reforming method, it is possible to obtain the same effect as that of the soil reforming apparatus according to the fifth aspect.

As a twelfth aspect, the present invention is a soil-modifying / plant-growing method for soil not exposed to sunlight, which comprises the first step of emitting light having a wavelength of 600 nm to 700 nm. A second step of condensing the light emitted in the first step and irradiating a germinating ground surface plant.

According to this plant growing method, it is possible to obtain the same effect as that of the plant growing apparatus according to the sixth aspect.

The soil reforming or plant growing methods according to the seventh to twelfth aspects described above may be carried out individually, or may be carried out in combination with each other. For example, the soil modification method according to the eighth aspect and the ninth method
It can be implemented in combination with the plant growing method according to the aspect.

[0050]

1 is a schematic view showing a soil reforming apparatus according to a first embodiment of the present invention.

The soil reforming apparatus according to this embodiment corresponds to the above-mentioned first aspect of the present invention.

The soil reforming apparatus according to the present embodiment is provided with a lens 1 that collects sunlight S and a lens 1 arranged below the lens 1.
200 to 4 from the sunlight S collected by the lens 1
It is composed of a bandpass filter 2 which passes only ultraviolet rays having a wavelength of 00 nm, and a plastic optical fiber 3 which is buried in the soil at one end and is connected to the bandpass filter 2 at the other end. The plastic optical fiber 3 irradiates the soil with the ultraviolet rays that have passed through the bandpass filter 2 through one end of the bandpass filter 2 embedded in the soil.

The soil reforming apparatus according to this embodiment is an apparatus used in an environment in which sunlight S can be obtained, and further used to reform the soil before sowing seeds in the soil. is there.

The soil reforming apparatus according to this embodiment functions as follows.

The sunlight S emitted from the sun is condensed by the lens 1. The concentrated sunlight S enters the bandpass filter 2, and the bandpass filter 2 passes only ultraviolet rays having a wavelength of 200 to 400 nm.
Since the plastic optical fiber 3 is connected to the bandpass filter 2, the ultraviolet light passing through the bandpass filter 2 is transmitted by the plastic optical fiber 3 and radiated into the soil.

Most of the ultraviolet rays contained in sunlight cannot be incident on the soil because most of them are reflected on the ground surface or backscattered. However, the soil modification according to the present embodiment is not possible. According to the device, ultraviolet rays having a bactericidal effect can be surely introduced into the soil, and microorganisms harmful to plants in the soil where seeds should be planted can be reliably removed.

Further, by burying titanium oxide or charcoal in the soil in advance, it is possible to double the bactericidal effect.

The number of combinations of the lens 1, the bandpass filter 2 and the plastic optical fiber 3 in the soil reforming apparatus according to this embodiment is arbitrary. Figure 1
In the above, the number of combinations of the lens 1, the bandpass filter 2, and the plastic optical fiber 3 is two, but the number is not limited to two, and may be one, or three or four or more.

FIG. 2 is a schematic view showing a soil reforming / plant growing apparatus according to the second embodiment of the present invention.

The soil reforming / plant growing apparatus according to this embodiment corresponds to the combination of the above-mentioned second and third aspects of the present invention.

The soil reforming / plant growing apparatus according to the present embodiment uses the first lens 1a that collects the sunlight S, the second lens 1b that collects the sunlight S, and the first lens 1a. The first band-pass filter 2a that allows only infrared rays having a wavelength of 1400 nm to 20 μm to pass from the reflected sunlight S, one end of which is buried in the soil and the other end of which is the first
From the plastic optical fiber 3a connected to the bandpass filter 2a and the sunlight S collected by the second lens 1b, the second bandpass filter 2b that passes only light having a wavelength of 600 nm to 700 nm.
It consists of

The plastic optical fiber 3a irradiates the light, which has passed through the first bandpass filter 2a, into the soil through one end embedded in the soil. The second bandpass filter 2b irradiates the buds 5 germinated from the seeds 4 planted in the soil with the concentrated sunlight S.

The soil reforming / plant growing apparatus according to the present embodiment is provided with two first lenses 2a, and these two first lenses 2a are provided on both sides of the second lens 1b.
They are arranged symmetrically with respect to b.

The soil reforming / plant growing apparatus according to this embodiment is an apparatus used in an environment where sunlight S can be obtained, and is used before and after germination of seeds sown in soil. It is a device.

The soil reforming apparatus according to this embodiment functions as follows.

The sunlight S emitted from the sun is collected by the first lens 1a. The sunlight S collected by the first lens 1a enters the first bandpass filter 2a,
The first bandpass filter 2a is 1400 nm to 20 nm.
Only infrared rays with a wavelength of μm are allowed to pass. The first band pass filter 2a has a plastic optical fiber 3
Since a is connected, the first bandpass filter 2
The infrared ray that has passed through a is transmitted by the plastic optical fiber 3a and is radiated into the soil.

The sunlight S emitted from the sun is collected not only by the first lens 1a but also by the second lens 1b. Second
The sunlight S collected by the lens 1b enters the second bandpass filter 2b, and only light having a wavelength of 600 nm to 700 nm passes through the second bandpass filter 2b and is irradiated on the sprouts 5.

For example, after sterilizing the soil by the soil reforming apparatus according to the first embodiment described above, mycorrhizal fungi are planted together with the seeds 4 in the sterilized soil, and the mycorrhizal fungi and the seeds 4 are plasticized. The above-mentioned light belonging to infrared rays is radiated into the soil through the optical fiber 3a. As a result, it is possible to promote the growth of mycorrhizal fungi and promote the growth of roots of the seed 4.

The second bandpass filter 2b has 6
Only light having a wavelength of 00 nm to 700 nm is passed through, and the light is applied to the sprouts 5 of the seed 4. As aforementioned,
Since light having a wavelength of 600 nm to 700 nm is the most suitable light for photosynthesis of plants, the bud 5 is irradiated with light having a wavelength of 600 nm to 700 nm through the second bandpass filter 2b, so that the bud 5 The photosynthesis of can be promoted.

The number of combinations of the first lens 1a, the first bandpass filter 2a and the plastic optical fiber 3a in the soil reforming apparatus according to this embodiment is arbitrary. In FIG. 2, the first lens 1a, the first bandpass filter 2a and the plastic optical fiber 3 are shown.
The number of combinations of a is 2, but the number is not limited to 2, and may be 1 or 3 or 4 or more.

A combination of the first lens 1a, the first bandpass filter 2a and the plastic optical fiber 3a (hereinafter referred to as "combination A") and a combination of the second lens 1b and the second bandpass filter 2b (hereinafter referred to as "combination A"). The positional relationship with the combination B ”) is also arbitrary.

For example, a plurality of combinations A can be arranged linearly, and the combinations B can be arranged on both the left and right sides of the combination. Alternatively, a plurality of combinations B may be arranged in a circle around the single combination A.

FIG. 3 is a schematic view showing a soil reforming apparatus according to the third embodiment of the present invention.

The soil reforming apparatus according to this embodiment corresponds to the above-mentioned fourth aspect of the present invention.

The soil reforming apparatus according to this embodiment is 200
Light source 7 that emits ultraviolet light having a wavelength of 400 nm to 400 nm
And a lens 1 that collects the ultraviolet rays emitted from the light source 7.
And a plastic optical fiber 3 having one end buried in the soil and the other end connected to the lens 1.

The plastic optical fiber 3 is the lens 1
The ultraviolet light collected by is radiated into the soil through one end of the bandpass filter 2 buried in the soil.

As the light source 7, a light emitting diode (LE
D) or a semiconductor laser can be used.

The soil reforming apparatus according to the present embodiment is an apparatus used in an environment where sunlight cannot be obtained, and is also an apparatus used to reform the soil before sowing seeds in the soil. .

The soil reforming apparatus according to this embodiment functions as follows.

The ultraviolet light emitted from the light source 7 is condensed by the lens 1. Since the plastic optical fiber 3 is connected to the lens 1, the ultraviolet rays collected by the lens 1 are transmitted by the plastic optical fiber 3,
It is radiated into the soil.

Unlike the case of the soil reforming apparatus according to the first embodiment described above, the soil reforming apparatus according to the present embodiment is in an environment in which sunlight cannot be obtained, so that it is a substitute for sunlight. The light source 7 that emits ultraviolet rays is used as a means. Therefore, the effect obtained by the soil reforming apparatus according to the present embodiment is basically the same as the effect obtained by the soil reforming apparatus according to the first embodiment.

As with the soil reforming apparatus according to the first embodiment, the number of combinations of the light source 7, the lens 1 and the plastic optical fiber 3 in the soil reforming apparatus according to this embodiment is arbitrary. Although the number of combinations of the light source 7, the lens 1 and the plastic optical fiber 3 is two in FIG. 3, the number is not limited to two, and may be one, three or four or more.

FIG. 4 is a schematic diagram showing a soil reforming / plant growing apparatus according to a fourth embodiment of the present invention.

The soil reforming / plant growing apparatus according to the present embodiment corresponds to the combination of the fifth and sixth aspects of the present invention described above.

The soil reforming / plant growing apparatus according to the present embodiment includes a first light source 8a which emits infrared rays having a wavelength of 1400 nm to 20 μm, and a first lens which collects ultraviolet rays emitted from the first light source 8a. 1a and a plastic optical fiber 3a having one end buried in the soil and the other end connected to the first lens 1a, 600 nm to 700 nm
a second light source 8b that emits light having a wavelength of nm;
The lens 1b that collects the light emitted from the light source 8b.

The plastic optical fiber 3a irradiates the light collected by the first lens 1a into the soil through one end of the plastic optical fiber 3a buried in the soil. The second lens 1b irradiates the seed 4 planted in the soil with the focused infrared rays on the sprouts 5 germinated.

As the light source, for example, a light emitting diode (LED) or a semiconductor laser can be used.

The soil reforming / plant growing apparatus according to this embodiment is provided with two first lenses 2a, and these two first lenses 2a are provided on both sides of the second lens 1b.
They are arranged symmetrically with respect to b.

The present soil reforming apparatus is an apparatus used in an environment where sunlight cannot be obtained, and further used before and after sowing seeds in soil.

Since sunlight cannot be obtained in the environment where this device is used, a light source that emits ultraviolet rays equivalent to sunlight is used instead of sunlight. This allows the second
It is possible to obtain the same effect as the soil reforming / plant growing device according to the embodiment.

The number of combinations of the first light source 8a, the first lens 1a and the plastic optical fiber 3a in the soil reforming apparatus according to this embodiment is arbitrary. In FIG. 4, the first light source 8a and the first lens 1a
The number of combinations of the plastic optical fiber 3a and the plastic optical fiber 3a is two, but is not limited to two and may be one, three, or four or more.

A combination of the first light source 8a, the first lens 1a and the plastic optical fiber 3a (hereinafter,
The positional relationship between the "combination A") and the combination of the second light source 8b and the second lens (hereinafter referred to as "combination B") is also arbitrary.

For example, a plurality of combinations A can be arranged in a straight line, and the combinations B can be arranged on both the left and right sides. Alternatively, a plurality of combinations B may be arranged in a circle around the single combination A.

[0094]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the soil can be effectively reformed without performing the complicated work which has been conventionally performed such as direct irradiation of sunlight / solar heat or direct heating of soil. Alternatively, a plant can be grown.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the structure of a soil reforming apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing the structure of a soil reforming / plant growing apparatus according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram showing the structure of a soil reforming apparatus according to a third embodiment of the present invention.

FIG. 4 is a schematic diagram showing the structure of a soil reforming / plant growing apparatus according to a fourth embodiment of the present invention.

[Explanation of symbols]

1, 1a, 1b lens 2, 2a, 2b bandpass filter 3, 3a Plastic optical fiber 4 seeds 5 buds 7, 8a, 8b Light source

Claims (12)

[Claims] 1. A lens that collects sunlight, and 200 to 4 from the sunlight that is collected by the lens.
A soil amendment consisting of a bandpass filter that passes only light having a wavelength of 00 nm, and an optical fiber that has one end buried in the soil and that irradiates the light that has passed through the bandpass filter into the soil from the one end. Quality equipment. 2. A lens that collects sunlight, and 1400 nm from the sunlight that is collected by the lens.
A soil comprising a bandpass filter that allows only light having a wavelength of 20 μm to 20 μm to pass therethrough, and an optical fiber that has one end buried in the soil and that irradiates the light that has passed through the bandpass filter into the soil from the one end. Reformer. 3. A lens for concentrating sunlight, and a bandpass for irradiating a germinating surface plant with only light having a wavelength of 600 nm to 700 nm from the sunlight condensed by the lens. A plant growing device consisting of a filter. 4. A soil reforming apparatus used for soil not exposed to sunlight, the light source emitting ultraviolet light having a wavelength of 200 to 400 nm, and the lens condensing the ultraviolet light emitted from the light source. And an optical fiber having one end buried in the soil and irradiating the soil with the ultraviolet rays condensed by the lens from the one end. 5. A soil reforming apparatus used for soil not exposed to sunlight, the light source emitting infrared light having a wavelength of 1400 nm to 20 μm, and the lens condensing the infrared light emitted from the light source. And a fiber optic having one end buried in the soil and irradiating the infrared light condensed by the lens into the soil from the one end. 6. A plant growing device for use in soil that is not exposed to sunlight, wherein the light source emits light having a wavelength of 600 nm to 700 nm, and the light emitted from the light source is condensed to germinate. A plant growing device that consists of a lens that irradiates the plants on the surface of the ground. 7. From the first step of collecting sunlight and the sunlight collected in the first step, 200
A second step of passing only ultraviolet rays having a wavelength of 400 nm to 400 nm, and a bandpass filter having one end buried in the soil, and passing the light passed through the second step into the soil from the one end. A third step of irradiating, and a soil reforming method comprising: 8. The first process of concentrating sunlight, and 140 of the concentrating sunlight in the first process.
A second process of passing only light having a wavelength of 0 nm to 20 μm, and irradiating the light passed through in the second process into the soil from the one end through an optical fiber having one end buried in the soil. And a third step of: 9. From the first step of concentrating sunlight and the sunlight collected in the first step, 600
only light having a wavelength of nm to 700 nm is transmitted,
A second step of irradiating a germinated surface plant, and a method for growing a plant. 10. A soil reforming method for soil not exposed to sunlight, comprising: a first step of emitting ultraviolet rays having a wavelength of 200 to 400 nm; and the step of emitting light in the first step. Second step of collecting ultraviolet rays and third step of irradiating the ultraviolet rays collected in the second step into the soil from the one end through an optical fiber having one end buried in the soil A soil reforming method comprising: 11. A soil reforming method for soil not exposed to sunlight, comprising: a first step of emitting infrared rays having a wavelength of 1400 nm to 20 μm; and a step of emitting light in the first step. Second step of collecting infrared rays, and third step of irradiating the infrared rays collected in the second step into the soil from the one end through an optical fiber having one end buried in the soil A soil reforming method comprising: 12. A soil reforming / plant growing method for soil not exposed to sunlight, comprising a first step of emitting light having a wavelength of 600 nm to 700 nm, and light emission in the first step. A second step of converging the generated light and irradiating a germinated surface plant.