JP2003158922A - Lighting device and lighting control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device properly controlling the forcing cultivation and flower quality of plants. <P>SOLUTION: The lighting control method is such that photon flux of wavelength of 700-800 nm radiates light greater than that of wavelength of 600-700 nm from the transplant of long day plants to the vegetative growth period of calyx formation, and the photon flux of wavelength of 600-700 nm radiates light greater than that of wavelength of 700-800 nm in a flowering period from calyx formation to flowering. The cultivation of the long day plants improved in flower quality becomes possible through elongating internode by growing plant height through taking enough time in the vegetative growth period and promptly flowering in the flowering period so as to increase flower weight. The photon flux of wavelength of 600-700 nm radiates light greater than that of wavelength of 700-800 nm in the vegetative growth period. The photon flux of wavelength of 700-800 nm radiates light greater than that of wavelength of 600-700 nm in the flowering period. The internode is shortened in the vegetative growth period to increase the number of leaves in a short period and flowers are appropriately flowered in the flowering period so as to cultivate them in a short period. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination device and an illumination control method for controlling photomorphogenesis of plants.

[0002]

2. Description of the Related Art Heretofore, as a lighting device of this type, a structure disclosed in, for example, Japanese Patent Laid-Open No. 10-178899 has been known. In this Japanese Patent Laid-Open No. 10-178899,
0% to 50% of the photon flux of wavelength 450 nm among blue of wavelength 400 nm to wavelength 500 nm, wavelength 600
nm or wavelength of 660 nm in the red wavelength of 700 nm
Has a photon flux of 40% to 100% and a photon flux of 730 nm of far-red light having a wavelength of 700 nm to 800 nm of 0% to 10%, and has a total of 100%. .

Irradiation with a constant light quality is carried out from the planting period to the vegetative growth period of flower cluster formation and from the flower formation period of flower cluster formation to flowering, with the aim of promoting the flowering promotion effect and the flower growth promotion effect of long-day plants and shortening the cultivation period. ing.

[0004]

However, in the case of the illumination device described in the above-mentioned Japanese Patent Laid-Open No. 10-178899, a constant light is applied from the planting to the vegetative growth period of flower cluster formation and from the flower formation period of flower cluster formation to flowering. Because the quality is irradiating,
In the case of flowers, forcing cultivation of plant height is possible, but the flower weight cannot be obtained, and the flower quality expressed by the weight of cut flowers relative to the length of cut flowers when cut flowers is It may be lower than the flowers grown under.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an illuminating device and an illuminating control method for appropriately controlling forcing cultivation of plants and flower quality.

[0006]

According to a first aspect of the present invention, an illumination device irradiates a long-day plant with an integral value of photon flux of wavelength 600 nm to 700 nm larger than an integral value of photon flux of wavelength 700 nm to 800 nm. A first irradiating means; a second irradiating means for irradiating a long-day plant with an integrated value of a photon flux having a wavelength of 700 nm to 800 nm larger than an integrated value of a photon flux having a wavelength of 600 nm to 700 nm; and a first irradiating means. And a switching means for switching one of the second irradiation means so that the irradiation amount is increased, and switching is performed during the vegetative growth period from planting of a long-day plant to inflorescence formation and from inflorescence formation to flowering. By switching to either one of the first irradiation means and the second irradiation means by means, it is possible to control the forced cultivation and the improvement of flower quality.

The illumination device according to a second aspect is the illumination device according to the first aspect, wherein the switching means is switched from the fixed planting to the second irradiation means during the vegetative growth period of inflorescence formation, from inflorescence formation to flowering. To the first irradiation means during the flowering period of, and to the first irradiation means during the vegetative growth period from planting to inflorescence formation, and the second irradiation means during the flowering period from inflorescence formation to flowering.
It is possible to switch to the irradiating means, and the setting means for selectively setting one of these switching means is provided,
In the vegetative growth period, the integrated value of the photon flux of wavelength 700nm to wavelength 800nm is wavelength 600nm to wavelength 700n.
It is larger than the integral value of photon flux of m, and the internodes are lengthened by growing the plant height over a sufficient time, and the integral value of the photon flux of wavelength 600nm to wavelength 700nm is wavelength 700nm to wavelength It is made larger than the integrated value of the photon flux of 800 nm, and the flower weight is increased promptly to increase the flower weight to enable the cultivation of long-day plants with improved flower quality, and the wavelength of 600 nm to 700 nm during the vegetative growth period.
The integrated value of the photon flux of nm is wavelength 700 nm to wavelength 8
It is larger than the integral value of the photon flux of 00 nm, and the internodes are shortened to increase the number of leaves in a short time.
m or the wavelength of 800 nm, the integrated value of the photon flux is 60
It can be cultivated in a short period of time by setting the value larger than the integral value of the photon flux of 0 nm to 700 nm to appropriately bloom.

An illumination device according to a third aspect is the illumination device according to the second aspect, further comprising timer means for setting a vegetative growth period and a flowering period according to timing, and the switching means includes timing for the timer means. Since the vegetative growth time is set in advance by the timer means, the vegetative growth time can be easily switched to the flowering time.

An illumination device according to a fourth aspect is the illumination device according to the second or third aspect, further comprising detection means for detecting the height of the long-day plant, and based on the height detected by this detection means. By detecting the height of the long-day plant by the detection means and switching from the vegetative growth stage to the flowering stage based on this height, it is possible to flower at an appropriate plant height.

An illumination device according to a fifth aspect is the illumination device according to any one of the first to fourth aspects, wherein the switching means is
It makes the photon flux at the flowering stage larger than at the vegetative growth stage,
By increasing the photon flux during the flowering period when more photon flux is required, the photon flux during the flowering period can be increased to efficiently flower and improve energy efficiency.

According to a sixth aspect of the present invention, in the electric illumination device according to any one of the first to fifth aspects, the second irradiating means also emits a photon flux having a wavelength of 400 nm to 700 nm. 700nm to 800n wavelength
Although the photon flux of m is not visible, the photon flux of 400 nm to 700 nm is visible in the visible region by emitting the photon flux of 400 nm to 700 nm.
By visually observing the photon flux of 0 nm, the lighting of the second irradiation means can be visually confirmed.

According to a seventh aspect of the present invention, there is provided a method for controlling lightning, wherein a wavelength of 700 nm is calculated from an integrated value of photon flux of wavelength 600 nm to 700 nm during a vegetative growth period from planting of long-day plants to flower cluster formation.
light having a larger integral value of the photon flux of nm to 800 nm is emitted, and the photon flux of wavelength 600 nm to 700 nm is more than the integral value of the photon flux of 700 nm to 800 nm during the flowering period from inflorescence formation to flowering. Light with a larger integrated value emits light, and the internodes are lengthened by allowing plant height to grow for a sufficient amount of time during the vegetative growth period, and in the flowering period they are quickly flowered to increase the flower weight. By doing so, it becomes possible to grow long-day plants with improved flower quality.

According to the eighth aspect of the present invention, there is provided a method for controlling lightning, wherein a wavelength of 600 nm is calculated from an integrated value of photon flux having a wavelength of 700 nm to 800 nm during a vegetative growth period from planting of long-day plants to flower cluster formation.
light having a larger integral value of the photon flux of nm to 700 nm is emitted, and from the integral value of the photon flux of 600 nm to 700 nm during the flowering period from inflorescence formation to flowering, the photon flux of 700 nm to 800 nm Light with a larger integrated value emits light, which shortens the internodes during the vegetative growth period to increase the number of leaves in the short term, and allows proper flowering during the flowering period for short-term cultivation. .

An illumination control method according to a ninth aspect is the seventh aspect.
Alternatively, in the illumination control method according to 8, the vegetative growth period time is set in advance, and the flowering period is set after the set time has elapsed. By setting the vegetative growth period time in advance, To switch from flowering to flowering.

A light control method according to a tenth aspect of the present invention is the light control method according to any one of the seventh to ninth aspects, wherein the photon flux at the flowering stage is made larger than that at the vegetative growth stage, and a large photon flux is required. By increasing the photon flux during the flowering period, it becomes possible to grow efficiently.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an illumination device of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an illuminating device according to one embodiment, FIG. 2 is a sectional view showing the illuminating device, and as shown in FIGS. 1 and 2, reference numeral 1 is the illuminating device. The illuminating device 1 has a glass or plastic cylindrical tube body 2 having a light-transmitting property, and a base 3 is attached to both ends of the tube 2, and these bases 3 and 3 serve as connecting means. A pair of pins 4, 4, 5, 5 are attached.

Further, in the tube body 2, an elongated rectangular circuit board 6 having a longitudinal direction along the longitudinal direction of the tube body 2 is accommodated. Then, on the circuit board 6, Ga, A, which are III-V group compound semiconductors, are arranged along one end side in the longitudinal direction.
l and As, G which is also a III-V compound semiconductor
a, Al and P, or also a III-V group compound I
First light emitting diodes 7 as first irradiating means which include n, Ga, Al and P and have a peak in the photon flux in the wavelength range of 600 nm to 700 nm are arranged linearly at equal intervals and the other end side. A second light emitting diode 8 as a second irradiation means having Ga and P and having a peak in the photon flux with far infrared rays having a wavelength of 700 nm to a wavelength of 800 nm is located between the portions where the first light emitting diode 7 is located. Correspondingly, they are linearly arranged at equal intervals in parallel with the first light emitting diode 7. In addition to the second light emitting diode 8, a second light emitting diode 9 is disposed as a second irradiating means for irradiating one or more visible light having a wavelength of 400 nm to 700 nm having 50 or more photons. . A nitride containing N may be used for either the first light emitting diode 7 or the second light emitting diode 8. Further, as the first light emitting diode 7, GaA
1As / GaP system, GaAsP: N / GaP system, In (GaAl) P / GaAs system, etc.
As the light emitting diode 8 of, GaP: ZnO / GaP
There is a system.

Further, power is supplied from the pins 4 and 5 to the back side of the circuit board 6, and the first light emitting diode 7 is supplied.
And a lighting circuit 10 for causing the second light emitting diode 8 to emit light.
Is attached.

FIG. 3 is a circuit diagram showing a lighting circuit. In this lighting circuit 10, an AC input terminal of a lighting module 11 as a switching means is connected to a commercial AC power source e, and the lighting module 11 is connected.
To the DC output terminal of the first light-emitting diode 7 and the second
The light emitting diodes 8 and 9 are alternately connected in series and independently connected in parallel so that their outputs can be adjusted. Further, in the lighting module 11, the integrated value of the photon flux having a wavelength of 600 nm to 700 nm is 700 nm.
Setting means for making the value larger than the integral value of the photon flux of m to 800 nm, or the integral value of the photon flux of wavelength 600 nm to 700 nm larger than the integral value of the photon flux of wavelength 700 nm to 800 nm.
12 are connected. In any case, only one of the first light emitting diode 7 and the second light emitting diode 8 may be turned on to have a predetermined photon flux, and the first light emitting diode 7 and the second light emitting diode 8 may be used. Both 8 may be dimmed to adjust to a predetermined photon flux.

Then, for example, along the longitudinal direction in which the plant is planted, the longitudinal direction of the illumination device 1 is adjusted to be the first.
Light emitting diode 7 and second light emitting diodes 8, 9
By emitting light, the plants can be efficiently irradiated with the light from the first light emitting diode 7 and the second light emitting diodes 8 and 9.

Further, the lighting module 11 is set by the setting means 12.
4 to control the lighting state by the first irradiation means, and
As shown in, the integrated value of the photon flux of wavelengths 600 nm to 700 nm combined with the photon fluxes of the first light emitting diode 7 and the second light emitting diode 8 is 0.4 μmo.
1 μm / m ² · s and the integrated value of the photon flux at a wavelength of 700 nm to 800 nm is 0.4 μmol / m ²
The ratio between the integrated value of the photon flux having a wavelength of 600 nm to 700 nm and the integrated value of the photon flux having a wavelength of 700 nm to 800 nm is set to be larger than 1.0 while being smaller than s.

Further, similarly, the lighting module 11 is controlled by the setting means 12 to be turned on by the second irradiating means, and the first light emitting diode 7 and the second light emitting diode 8 are caused to emit light, whereby Light emitting diode 7
And the total emitted light of the illumination device 1 combined with the photon flux of the second light emitting diode 8 has a wavelength of 600 nm to 7 nm.
The integrated value of the photon flux of 00 nm is 0.1 μmol / m ² ·
smaller than s, wavelength 700nm or wavelength 800nm
Is larger than 0.1 μmol / m ² · s, and the ratio between the integral value of the photon flux at wavelengths of 600 nm to 700 nm and the integral value of the photon flux at wavelengths of 700 nm to 800 nm is 1.0 or less. Make it smaller.

[0024]

[Table 1]

As shown in Table 1, for example, during the vegetative growth period from planting to inflorescence formation, the integrated value of the photon flux of wavelength 700 nm to 800 nm is larger than the integrated value of the photon flux of wavelength 600 nm to 700 nm. Light is emitted and the lighting module 11 is switched by the setting means 12 at the time when the flower is desired to bloom, and in the flowering period from inflorescence formation to flowering, the photon of wavelength 600 nm to 700 nm is calculated from the integrated value of the photon flux of wavelength 700 nm to 800 nm. The light whose integrated value of the bundle is larger is emitted, and
As shown in (a), although the growing time is longer than that in the case of growing in the sunlight, the internodes are lengthened by growing the plant height over a sufficient period during the vegetative growth period,
During the flowering period, it is possible to cultivate a long-day plant in which flower quality is improved by rapidly flowering to increase the flower weight. In addition, since the flowering period can be arbitrarily controlled by changing from the vegetative growth period to the flowering period, the flowering period can be set arbitrarily.

In addition, during the vegetative growth period from planting to inflorescence formation, light having a larger integral value of photon flux of wavelength 600 nm to 700 nm than the integral value of photon flux of wavelength 700 nm to 800 nm is emitted to flower. The lighting module 11 is switched by the setting means 12 at a desired time, and the wavelength of 700 nm is calculated from the integrated value of the photon flux of wavelength 600 nm or wavelength 700 nm during the flowering period from the formation of the inflorescence to the flowering.
Or, light having a larger integrated value of photon flux of wavelength 800 nm is emitted, and as shown in FIG. 5 (b), the internodes are shortened during the vegetative growth period to increase the number of leaves in a short period of time, and the flowering period is increased. Can be cultivated in a short period of time as compared with the case where it is properly flowered and cultivated with sunlight.

Instead of the one set by the setting means 12, the time of the vegetative growth period is set in advance, and after the predetermined time has passed, the growth period is automatically switched to the flowering period. Good. If set in this way, the flowering time can be set in advance and the cultivation can be carried out systematically.

Further, a detecting means for detecting the plant height of the long-day plant is provided, and when it detects that the plant height reaches a preset height, the detecting means automatically switches from the growing stage to the flowering stage. You may With this setting, the plant height of long-day plants can be made uniform, and the quality can be easily stabilized.

Further, the photon flux at the flowering stage may be made larger than that at the vegetative growth stage. By increasing the photon flux during the flowering period when more photon flux is needed, a large photon flux is not always required, and the photon flux can be increased only during the flowering period to efficiently bloom and save the electricity bill for illumination. With that, energy efficiency is improved.

In addition to the second light emitting diode 8,
The second light emitting diode 9 is turned on, and since the second light emitting diode 8 cannot be visually observed only, the second light emitting diode 9 is turned on and visible light is emitted to artificially confirm the second light emitting diode 8 is turned on. However, even if the second light-emitting diode 9 is not attached, there is no effect on the cultivation of flowers.

The first light emitting diode 7 and the second light emitting diode 7
The light emitting diodes 8 and 9 are linearly arranged on the circuit board 6, but may be arranged in a matrix or randomly.

The first light emitting diode 7 and the second light emitting diode 7
In order to protect the light-emitting diodes 8 and 9 of FIG. 1, a series of protection capacitors or series circuits of protection capacitors and resistors are connected in parallel to the first light-emitting diode 7 and the second light-emitting diodes 8 and 9, respectively. In order to protect the first light-emitting diode 7 and the second light-emitting diodes 8 and 9 from electrostatic breakdown by connecting or connecting the protective diode or the series circuit of the protective diode and the resistor in anti-parallel. You may

Further, the lighting device 1 is provided with a light guide means such as an optical fiber or an acrylic light guide plate, and the first light emitting diode 7 and the second light emitting diodes 8 and 9 are provided at desired places by such light guide means. The light from the above may be guided and irradiated.

Further, the lighting module 11 turns the first light emitting diode 7 and the second light emitting diode 8 at 50 Hz.
The second light emitting diode 9 may be turned on as described above, and may be turned on at about 5 Hz to 20 Hz with 50 or more photons. In this way, the second light emitting diode 9
By blinking at about 20 Hz to 20 Hz, it is possible for a person to easily feel the flicker and know the lighting of the second light emitting diode 8 even if the second light emitting diode 8 cannot be visually observed.

FIG. 6 is a cross-sectional view showing an illumination device of another embodiment. In the illumination device 1 shown in FIG. 2, a first light emitting diode is provided along the longitudinal direction at the center of the circuit board 6 in the width direction. 7 and the second light emitting diodes 8 and 9 are projected and bent so that they are located on the respective separate surfaces.

FIG. 7 is a sectional view showing an illumination device according to another embodiment. In the illumination device 1 shown in FIG. 2, the circuit board 6 has a cylindrical shape with a diameter smaller than that of the tube 2, and Is disposed coaxially with the tubular body 2. Further, on the outer peripheral surface of the circuit board 6, the first light emitting diode 7 and the second light emitting diode 8,
9 are arranged in a straight line alternately along the axial direction in the circumferential direction, and the lighting circuit 10 is housed inside the circuit board 6.

FIG. 8 is a sectional view showing an illumination device according to still another embodiment. In the illumination device 1 shown in FIG. 7, the circuit board 6 is curved with the longitudinal direction as an axis. The both sides in the longitudinal direction of the above are brought into contact with the tube body 2. The first light emitting diodes 7 and the second light emitting diodes 8 and 9 are alternately arranged in the circumferential direction on the surface of the circuit board 6 in a straight line along the axial direction, and the lighting circuit is provided on the back surface of the circuit board 6. 10 are stored.

FIG. 9 is a perspective view showing an illumination device according to another embodiment of the present invention, in which a hydrophilic polymer material or a hydrophilic metal oxide film obtained by combining, for example, titanium oxide with a silicone material is provided on the surface. Provided polymeric cover
The base 16 of the cover body 16 is fitted with an Edison-based mouthpiece 17 via a water-repellent layer (not shown) containing, for example, at least one of silicone resin, fluororesin, and fluorosilicone resin. It is installed. Also,
Similarly, on the front end side of the cover body 16, a metal having a hydrophilicity, for example, titanium oxide combined with a silicone material through a water repellent layer (not shown) containing at least one of a silicone resin, a fluororesin, and a fluorosilicone resin is used. A holder 18 made of a translucent polymer material having an oxide film is bonded and attached, and the cover 16 and the holder 18 have a substantially bulb shape. In addition, the cover body 16 and the holding body
The circuit board 6 is accommodated in the inside 18, and the circuit board 6 including the mounted first light emitting diode 7 and the second light emitting diodes 8 and 9 is molded with a light-transmitting water-repellent resin. A lighting circuit 10 is attached to the back side of the circuit board 6, and the lighting circuit 10 is connected to a lead wire 19 with a base 17
Electrically connected to.

As described above, the water repellent layer is provided at the joint portion of the cover body 16 and the holding body 18 and the fitting portion of the cover body 16 and the base 17 to prevent water from entering the inside.

Further, by making the surfaces of the cover body 16 and the holding body 18 hydrophilic, the attached water is dropped by gravity to prevent water droplets from being attached due to water sprinkling and the dirt attached to the surface is washed away with rainwater. You can

Furthermore, by molding the circuit board 6 together with the first light emitting diode 7, the second light emitting diodes 8 and 9 and the like with a light-transmitting water-repellent resin, the circuit board 6 is prevented from being short-circuited due to adhesion of water. At the same time, the temperature of the circuit board 6 can be reduced.

If high waterproofness is not required, the cover body 16 is made of ordinary glass or plastic, and the holder 18 is made of frost or transparent glass or translucent plastic. May be.

The circuit board 6 is not limited to a flat plate or a curved plate in any case, and the same effect can be obtained in any shape such as a spherical shape or an aspherical shape.

FIG. 10 is a plan view showing a part of the illumination device cut out, FIG. 11 is a front view showing a part of the illumination device cut away, and FIG. 12 is a part of the illumination device cut out. It is a side view shown. As shown in FIGS. 10 to 12, the illumination device 1 is a moisture-proof type, and has a box-shaped base 22 having an irradiation opening 21 on the upper surface, and the circuit board 6 is attached to the base 22 with screws 23. Has been. In addition, a cover body 24 that closes the irradiation opening 21 is attached to the irradiation opening 21 of the base 22, and a hydrophilic coating containing titanium oxide, for example, is provided in a portion where the irradiation opening 21 and the cover body 24 are connected. It is formed to prevent the infiltration of water and water vapor, and a water-repellent coating containing, for example, at least one of a silicone-based resin and a fluorine-based resin is formed on the surface of the hydrophilic coating to be waterproof and moisture-proof. .

In the above-described embodiment, the light emitting diode is used for description, but the first light emitting diode 7 and the second light emitting diodes 8, 9 may be replaced by a straight tube type or a bulb type fluorescent lamp. The effect of can be obtained.

In this case, the emission spectrum has a wavelength of 700n.
Chromium-activated gallium gadolinium oxide (Gd ₃ Ga ₅ O ₁₂ : C) having an emission peak at a wavelength of m to 800 nm
r) a phosphor, a europium-activated yttrium aluminate (Y ₃ Al ₅ O ₁₂ : Eu) phosphor, which is a europium-activated rare earth phosphor having an emission spectrum having an emission peak at a wavelength of 600 nm to 620 nm, and
A manganese-activated magnesium fluorogermanate phosphor having an emission peak at a wavelength of 660 nm to 670 nm may be used. Alternatively, a Y ₃ Ga ₅ O ₁₂ : Cr phosphor may be used.

[0047]

According to the illumination device of the first aspect, the first irradiation means and the second irradiation means are provided by the switching means in the vegetative growth period from planting of a long-day plant to inflorescence formation and in the flowering period from inflorescence formation to flowering. By switching to any one of the irradiation means, it is possible to control the forced cultivation and the improvement of flower quality.

According to the illuminating device of the second aspect, in addition to the illuminating device of the first aspect, in the vegetative growth period, the wavelength is 700n.
m or the wavelength of 800 nm, the integrated value of the photon flux is 60
It is larger than the integral value of photon flux of 0 nm to 700 nm, and the internodes are lengthened by growing the plant height for a sufficient time, and the integral value of photon flux of wavelength 600 nm to 700 nm is the wavelength at the flowering stage. It is made larger than the integral value of the photon flux of 700 nm to 800 nm to promptly flower and increase the flower weight to enable cultivation of long-day plants with improved flower quality.
The integration value of photon flux of 00nm to wavelength 700nm is larger than the integration value of photon flux of wavelength 700nm to 800nm to shorten the internode and increase the number of leaves in a short period of time. The integrated value of the photon flux is from 600nm to 700n
It is possible to make cultivation in a short period of time by making it larger than the integral value of the photon flux of m and making it bloom properly.

According to the lighting device of the third aspect, in addition to the lighting device of the second aspect, the time of the vegetative growth period is set by the timer means in advance, so that the vegetative growth period is switched to the flowering period. Can be done easily.

According to the illuminating device of claim 4, in addition to the illuminating device of claim 2 or 3, the height of the long-day plant is detected by the detecting means, and the vegetative growth period is based on this height. By switching from to flowering period, it is possible to flower at an appropriate plant height.

According to the illumination device of claim 5, in addition to the illumination device according to any one of claims 1 to 4, by increasing the photon flux at the flowering stage, which requires more photon flux, It can flower efficiently and improve energy efficiency.

According to the sixth aspect of the present invention, in addition to the electric illumination device according to any one of the first to fifth aspects, a wavelength 70
Although the photon flux of 0 nm to 800 nm cannot be visually observed, the photon flux of 400 nm to 700 nm is emitted to emit the photon flux of 400 nm to 700 nm.
Since the photon flux of nm is visible in the visible region, by visually observing the photon flux of 400 nm to 700 nm, it is possible to visually confirm the lighting of the second irradiation unit.

According to the illumination control method of claim 7, the internodes are lengthened by allowing the plant height to grow for a sufficient period during the vegetative growth period, and the flowers are quickly flowered during the flowering period. It is possible to grow long-day plants with increased weight and improved flower quality.

According to the eighth aspect of the illumination control method, the internodes are shortened during the vegetative growth period to increase the number of leaves in a short period of time.
It can be cultivated in a short period of time by appropriately flowering during the flowering period.

According to the illumination control method of claim 9, in addition to the illumination control method of claim 7 or 8, by presetting the time of the vegetative growth period, the vegetative growth period changes to the flowering period. Switching can be done easily.

According to the illumination control method of the tenth aspect,
In addition to the method for controlling illumination according to any one of claims 7 to 9, by increasing the photon flux during the flowering period when a large number of photon fluxes are required, efficient cultivation can be achieved.

[Brief description of drawings]

FIG. 1 is a side view showing an illumination device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a circuit diagram showing a lighting circuit of the same.

FIG. 4 is a graph showing a wavelength and a relative light emission intensity of the above illumination device.

FIG. 5 is an explanatory view showing a cultivation state of the long day plant. (A) Emphasis on flower quality (B) Forced cultivation

FIG. 6 is a sectional view showing an illumination device of another embodiment of the above.

FIG. 7 is a cross-sectional view showing an illumination device of another embodiment of the above.

FIG. 8 is a sectional view showing an illumination device of still another embodiment of the same.

FIG. 9 is a perspective view showing an illumination device of another embodiment of the above.

FIG. 10 is a plan view showing a part of the above illumination device by cutting away.

FIG. 11 is a front view showing a part of the illumination device cut out.

FIG. 12 is a side view showing a part of the above illumination device by cutting away.

[Explanation of symbols]

1 Lighting device 7 First light emitting diode as first irradiation means 8 Second light emitting diode as second irradiation means 11 Lighting module as switching means 12 Setting method

Claims (10)

[Claims] 1. An integrated value of a photon flux having a wavelength of 600 nm to 700 nm has a wavelength of 700 nm to 800 n.
First irradiation means for irradiating long-day plants with a value larger than the integrated value of photon flux of m; wavelength 700 nm to wavelength 800 nm
The integrated value of the photon flux is 600 nm to 700 nm
second irradiation means for irradiating a long-day plant with a value larger than the integrated value of the photon flux of nm; switching means for switching so that the irradiation amount of either the first irradiation means or the second irradiation means increases. An illumination device characterized by being provided. 2. The switching means is switched to the second irradiation means during the vegetative growth period from planting to inflorescence formation, and to the first irradiation means during the flowering period from inflorescence formation to flowering, and
It is possible to switch to the first irradiation means during the vegetative growth period from planting to inflorescence formation and to the second irradiation means during the flowering period from inflorescence formation to flowering. Either of these switching means can be selectively The illumination device according to claim 1, further comprising setting means for setting. 3. The illuminating device according to claim 2, further comprising timer means for setting a vegetative growth period and a flowering period by timekeeping, and the switching means is switched based on the timekeeping of the timer means. 4. The illumination device according to claim 2, further comprising a detection means for detecting the height of the long-day plant, and switching based on the height detected by the detection means. 5. The switching means increases the photon flux during the flowering period rather than during the vegetative growth period.
The illumination device according to any one of claims. 6. The illumination device according to claim 1, wherein the second irradiation means also emits a photon flux having a wavelength of 400 nm to 700 nm. 7. Light is emitted from a plant of a long-day plant to a vegetative growth stage of flower cluster formation, in which the integral value of the photon flux at a wavelength of 700 nm to 800 nm is larger than the integral value of the photon flux at a wavelength of 600 nm to 700 nm. , Wavelength 700nm to wavelength 80 from flower formation to flowering
A lighting control method characterized in that light having an integral value of a photon flux having a wavelength of 600 nm to 700 nm is larger than an integral value of a photon flux of 0 nm is emitted. 8. In the vegetative growth period from planting of a long-day plant to inflorescence formation, light having a larger integral value of photon flux of wavelength 600 nm to 700 nm than that of photon flux of wavelength 700 nm to 800 nm is emitted. , Wavelength 600nm to wavelength 70 during flowering period from flower cluster formation to flowering
A lighting control method characterized in that light having a larger integral value of a photon flux having a wavelength of 700 nm to 800 nm than that of a photon flux of 0 nm is emitted. 9. The vegetative growth period time is set in advance,
9. The lighting control method according to claim 7, wherein the flowering period is reached after the set time has elapsed. 10. The illumination control method according to claim 7, wherein the photon flux at the flowering stage is made larger than that at the vegetative growth stage.