JP2000135031A - Culture of plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for culturing a plant, capable of not changing the shape of a plant such as the growth stimulation of the plant or the increased production of the edible portions of the plant but increasing a specific plant ingredient exhibiting effects in human bodies. SOLUTION: This method for culturing a plant is carried out under the irradiation of natural light. Therein, the plant is simultaneously irradiated with red light within a wavelength range of 620-760 nm and with blue light within a wavelength range of 400-480 nm to increase the production of a specific plant ingredient exhibiting effects in human bodies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel plant cultivation method for irradiating visible light of a specific wavelength during the growth period of a plant to increase the amount of a specific component in the plant that is effective in the human body. Things.

[0002]

2. Description of the Related Art Conventionally, in the field of plant cultivation and cultivation, so-called plant factory attempts have been made to cultivate plants using artificial light sources instead of natural light (sunlight), and some of them have been put into practical use. Is being done. In recent years, in order to efficiently cultivate plants, research has been made to increase the number of plantable parts of the plant mainly by irradiating light of a specific wavelength or supplementing with natural light.

[0003]

However, no attempt has been made to increase the amount of a specific component in a plant that is effective in the human body by changing the light quality of light applied to the plant.

[0004] The present invention has been made in view of the above problems, and its purpose is not to change the form of a plant such as promoting plant growth or increasing the number of plantable parts, but to achieve an effect in the human body. An object of the present invention is to provide a plant cultivation method capable of increasing the amount of a specific component in the plant shown.

[0005]

In order to achieve the above object, the present invention relates to a method for cultivating a plant, which is carried out under natural light irradiation under ordinary cultivation conditions. The plant is simultaneously irradiated with visible light of a wavelength to increase the amount of a specific component in the plant that is effective in the human body.

In another aspect, the present invention provides a method for cultivating a plant, which is performed under natural light irradiation under normal cultivation conditions.
The plant is simultaneously irradiated with red light having a wavelength range of m and blue light having a wavelength range of 400 to 480 nm to increase the amount of a specific component in the plant that is effective in the human body.

[0007]

Embodiments of the present invention will be described below.

First Embodiment Komatsuna of the family Brassicaceae was cultivated under sunlight irradiation under normal cultivation conditions. The cultivation procedure is as follows. (1) Komatsuna seeds were sown in flower pots. (2) On the seventh day after germination, a komatsuna having a plant height of about 3 cm was obtained. (3) Then, the flower pot is divided into a supplementary section and an untreated section, and the red light (peak wavelength: 660 nm, 15 nm) is applied so that the komatsuna in the supplementary section can be simultaneously irradiated with red light and blue light.
A commercially available red light emitting diode emitting 00 mcd) and a commercially available blue light emitting diode emitting blue light (peak wavelength 470 nm, 1500 mcd) were placed near the Komatsuna. Since the light-emitting diode used for supplementary light generates little heat, the temperature of the light-emitting diode during the growth process of Komatsuna is small and does not affect the growth amount. In this case, the red light emitting diode and the blue light emitting diode were installed such that the irradiation ratio of the komatsuna was 90% red light and 10% blue light in terms of luminous intensity. That is, in this embodiment, both the red light and the blue light
Since the light intensity is the same as 00 mcd, the ratio of the number of light emitting diodes used is 9 for the blue light emitting diode 1 and the red light emitting diode. (4) In this state, light was supplemented at a rate of 8 hours per day during the day in the supplementary light section, and the other cultivation conditions were in accordance with the ordinary cultivation conditions of Komatsuna. (5) On the 30th day after the germination, the komatsuna in the untreated section and the komatsuna in the supplementary section which were not supplemented were harvested. The growth amount of Komatsuna in the supplemental plot was the same as that in the untreated plot cultivated under the normal cultivation conditions, and did not decrease. (6) The β-carotene content of the harvested komatsuna was measured according to a known method for analyzing food additives. Result is,
Komatsuna harvested from the supplementary plots had about 30% more β-carotene than komatsuna harvested from the untreated plots.
It was found to be increasing.

As described above, from the seventh day after germination, 90% of red light with a peak wavelength of 660 nm and 1500 mcd and 10% of blue light with a peak wavelength of 470 nm and 1500 mcd using a red light emitting diode and a blue light emitting diode. Since the combined mixed light is supplemented, the period from the growing period to the harvesting period does not become long. In addition, during the growth process, the temperature effect of the light-emitting diodes used for light supplementation is small, so that the growth amount of Komatsuna harvested from the light supplemented area does not decrease from that harvested from the untreated area,
It was possible to increase the production of β-carotene, which has an effect as vitamin A in the human body, in Komatsuna.

<Second Embodiment> Parsley of the Umbelliferae family was cultivated under sunlight irradiation under normal cultivation conditions. The cultivation procedure is the same as in the first embodiment. Also in this case, it was found that the β-carotene content of the parsley harvested from the supplementary plot was increased by 20 to 30% compared to the parsley harvested from the untreated plot.

The ratio of the mixed light, that is, the irradiation ratio of the red light and the blue light to be supplemented, is set such that the red light is 50 to 95% and the blue light is 50 to 5% in terms of luminous intensity. I just need.

Further, in the present invention, the visible light of a specific wavelength irradiated during the growing period of the plant is not limited to red light and blue light.

[0013] Further, the light source using a light emitting diode as a light source for emitting visible light, red light, or blue light according to the present invention has been described. The visible light, red light, or blue light can be converted from natural light to a colored acrylic plate. Alternatively, transmitted light obtained by transmitting a light-transmitting film such as cellophane may be used. In short,
In the growing process of the plant, a light source that does not affect the temperature may be used for supplementary light.

The specific component in the plant of the present invention which is effective in the human body is not limited to β-carotene produced in the plant.

[0015]

As described above, according to the present invention, in a method for cultivating a plant under natural light irradiation, the plant is supplemented with visible light of at least two different wavelengths during the growing period of the plant. Thereby, a specific component having an effect in the human body in a living body of a plant (for example, β-carotene which is a precursor of vitamin A which is an important nutrient for the human body)
Without increasing the growth status of the plant (the period from the growing period to the harvesting period was increased, or the growing amount of the plant harvested from the supplementary plot was harvested from the untreated plot) This has the effect of increasing the production of the specific component in the plant body (without lowering that of the specific component).

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Hayashi 590-1 Takao, Tsuyama-shi, Okayama Prefecture, Japan Vegetation Co., Ltd. (72) Inventor Kanako Hirai 590-1 Takao, Tsuyama-shi, Okayama Prefecture Nippon Vegetation Co., Ltd. F Term (reference) 2B022 DA08

Claims (4)

[Claims] 1. A method for cultivating a plant, which is performed under natural light irradiation, wherein the plant is irradiated with visible light of at least two different wavelengths simultaneously during the growth period of the plant, and the plant exhibits an effect in the human body. A plant cultivation method characterized by increasing the amount of a specific component. 2. A method for cultivating a plant performed under natural light irradiation, wherein the plant is simultaneously irradiated with red light having a wavelength range of 620 to 760 nm and blue light having a wavelength range of 400 to 480 nm during the growth period of the plant. A plant cultivation method characterized by increasing the amount of a specific component in a plant that is effective in the human body. 3. The plant is a cruciferous Komatsuna or Apiaceae parsley or the like, the specific component in the plant is β-carotene having an effect as vitamin A in the human body, and the visible light or the red light. The blue light is transmitted light obtained by transmitting light from a light emitting diode as a light source or from natural light through a film-like material that transmits light such as a colored acrylic plate or cellophane. 3. The method for cultivating the plant according to 2. 4. The irradiation ratio of the red light emitting diode and the blue light emitting diode which emit the red light and the blue light to the plant, respectively, is such that the red light is 50 to 95 in terms of luminosity.
3. The blue light is set at 50 to 5% with respect to%.
Or the cultivation method of the plant of Claim 3.