JP2011101616A - Method for cultivating plant by radiating three color mixed light - Google Patents
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本発明は、太陽光が照射されない時間帯に光照射を行って植物を栽培する植物栽培方法、特に、遠赤色光を主体とした赤色光と青色光との３色混合光を照射する植物栽培方法に関する。 The present invention relates to a plant cultivation method for cultivating a plant by irradiating light in a time zone where sunlight is not irradiated, and in particular, plant cultivation for irradiating a mixed light of three colors of red light and blue light mainly composed of far red light. Regarding the method.
切り花類、鉢物類、花壇用苗物類、野菜などでは、開花を制御・促進させる技術は、価格の高い時期に出荷するなど収益性を上げるために重要である。長日植物の開花を促進させる手法としては、通常、白熱電球や蛍光ランプなど、幅広い波長を含む光源を利用した長日処理が行われている。しかしこの場合、開花促進にそれほど有効でない波長も含まれており、効率的とはいえない。 For cut flowers, potted plants, flowerbed seedlings, vegetables, etc., techniques for controlling and promoting flowering are important for increasing profitability, such as shipping at high prices. As a technique for promoting the flowering of long-day plants, a long-day treatment using a light source including a wide range of wavelengths such as an incandescent bulb and a fluorescent lamp is usually performed. However, in this case, a wavelength that is not so effective in promoting flowering is included, which is not efficient.
一方で、太陽光が照射されない時間帯に人工光を照射して植物の開花を促進する方法としては、遠赤色光からなる単色光を利用した長日植物の栽培法が知られている（特許文献１）。また、青色光からなる単色光によるもの（特許文献２）や遠赤色光と赤色光からなる２色の混合による方法（特許文献３、特許文献４、特許文献５）が知られている。特許文献５に記載の方法は品質に特化しており開花促進はうたっていない。更に、特許文献６には混色の照射方法が記載されているが、遠赤色光が含まれていないことと、エレクトロルミネッセンスシートの使用を前提としている。また、太陽光の性質を変えて開花調節を行う方法として被覆資材を利用したものがある（特許文献７）がハウス全体を資材で覆う必要があり、コスト的に問題があり、低い透過効率による冬季の生育不良の問題がある。
又、長日植物に対して、遠赤色光及び青色光は開花促進作用、赤色光は開花抑制作用があることが知られていた（非特許文献１）。
On the other hand, a method for cultivating long-day plants using monochromatic light composed of far-red light is known as a method for irradiating artificial light in a time zone when sunlight is not irradiated to promote plant flowering (patent) Reference 1). Further, a method using monochromatic light composed of blue light (Patent Document 2) and a method using two colors composed of far red light and red light (Patent Document 3, Patent Document 4, and Patent Document 5) are known. The method described in Patent Document 5 is specialized in quality and does not promote flowering. Furthermore, Patent Document 6 describes a mixed color irradiation method, but it is premised on the fact that far red light is not included and that an electroluminescent sheet is used. In addition, there is a method using a covering material as a method for controlling flowering by changing the nature of sunlight (Patent Document 7), but it is necessary to cover the entire house with the material, which is problematic in terms of cost, and due to low transmission efficiency There is a problem of poor growth in winter.
Further, it has been known that long red light and blue light have a flowering promoting action and red light has a flowering inhibiting action on long-day plants (Non-patent Document 1).
植物の栽培においては、低コストで、省力的な栽培方法が求められている。植物生産の大半を占めるハウス栽培で明期の光源を調節するには太陽光の影響を無視できない。そこで、閉鎖系でなく、ハウス栽培でも利用可能な技術開発が望まれており、そのためには昼間は太陽光で生育させ、夜間（暗期）に人工光を照射する技術が利用しやすい。 In plant cultivation, a low-cost and labor-saving cultivation method is required. The effect of sunlight cannot be ignored to adjust the light source in the light period in house cultivation, which accounts for the majority of plant production. Therefore, it is desired to develop technology that can be used not only in closed systems but also in house cultivation. For this purpose, it is easy to use technology that grows with sunlight during the daytime and irradiates artificial light at night (dark period).
従って、長日植物の開花および草丈制御に最も適した波長域に発光主波長のある光を用いて、しかも植物の光反応に最低限必要な光量を照射することで、開花制御及び促進、草丈制御及び草丈成長制御などを可能とする技術の出現が望まれていた。 Therefore, by using light having a dominant emission wavelength in the wavelength range most suitable for flowering and plant height control of long-day plants, and by irradiating the minimum amount of light necessary for the photoreaction of plants, flowering control and promotion, plant height The emergence of technology that enables control and plant height growth control has been desired.
本発明者らは、上記の課題を解決するために、発光ダイオード（LED）を用いて太陽光が照射されない時間帯に植物に照射する放射エネルギーの波長、照度及び光量と植物の生育、開花の関係を詳細に研究した。その結果、遠赤色光を主体とした赤色光と青色光の混合光を照射することによって、白熱電球（白色光）を使用する場合に比べて開花率が顕著に向上することを見出し、本発明を完成した。 In order to solve the above problems, the present inventors have used the light emitting diode (LED) to irradiate the plant with the wavelength, illuminance, and light amount of the radiant energy, and the growth and flowering of the plant. The relationship was studied in detail. As a result, it has been found that by irradiating mixed light of red light and blue light mainly composed of far red light, the flowering rate is remarkably improved as compared with the case of using an incandescent bulb (white light). Was completed.
本発明は、植物の光反応に最適な波長域の光を最低限必要の光量を照射することで、開花率を促進し、開花までの日数を短縮し、またそれらを所望に制御できる効率的な植物栽培方法を提供することを目的とする。 The present invention irradiates light in the wavelength range that is optimal for the photoreaction of plants with the minimum necessary amount of light, thereby promoting the flowering rate, shortening the number of days until flowering, and controlling them as desired. It aims at providing a simple plant cultivation method.
即ち、本発明の主な各態様は以下の通りである。
[態様１] 植物に対し、太陽光が照射されない時間帯において、発光主波長が700〜800nm（遠赤色光）、600〜700nm（赤色光）、及び、400〜500nm（青色光）にあるそれぞれの光の混合光を照射する植物栽培方法であって、遠赤色光の放射照度が赤色光及び青色光の各放射照度以上であることを特徴とする前記方法。
[態様２] 上記の植物栽培方法に使用するための栽培装置。
That is, each main aspect of the present invention is as follows.
[Aspect 1] In the time zone when sunlight is not irradiated to plants, the emission main wavelengths are 700 to 800 nm (far red light), 600 to 700 nm (red light), and 400 to 500 nm (blue light), respectively. A method for cultivating a plant that irradiates mixed light of the above-mentioned light, wherein the irradiance of far-red light is greater than or equal to the irradiance of red light and blue light.
[Aspect 2] A cultivation apparatus for use in the above plant cultivation method.
本発明の植物栽培方法によって、長日植物の開花を効率的に促進させて開花率を向上させ、開花までの日数を短縮することが可能となる。また、合計の放射照度や各波長の光の混合割合を調節することで、開花までの日数の制御が可能になる。更に、光源としてLEDを用いることで白熱電球と同等以上の効果を省エネルギーで実現することができるし、LED以外の光源でも同じ効果が得られる。 By the plant cultivation method of the present invention, it is possible to efficiently promote the flowering of long-day plants, improve the flowering rate, and shorten the number of days until flowering. In addition, the number of days until flowering can be controlled by adjusting the total irradiance and the mixing ratio of light of each wavelength. Furthermore, by using an LED as the light source, an effect equivalent to or better than that of an incandescent bulb can be realized with energy saving, and the same effect can be obtained with a light source other than the LED.
従来技術においては、長日植物に対して、遠赤色光及び青色光は開花促進作用、赤色光は開花抑制作用があることが知られていた（非特許文献１）。従って、本発明方法において、これら３色からなる混合光を照射することによって、それぞれの単色光を照射する以上に開花が促進されることは、従来の技術からは容易に予測できない顕著な効果である。 In the prior art, it has been known that far red light and blue light have a flowering promoting action and red light has a flowering inhibiting action on long-day plants (Non-Patent Document 1). Therefore, in the method of the present invention, by irradiating mixed light composed of these three colors, flowering is promoted more than by irradiating each monochromatic light, which is a remarkable effect that cannot be easily predicted from the conventional technology. is there.
本発明は、植物に対し、太陽光が照射されない時間帯において、発光主波長が700〜800nm（遠赤色光）、600〜700nm（赤色光）、及び、400〜500nm（青色光）にあるそれぞれの光の混合光を照射する植物栽培方法であって、遠赤色光の放射照度が赤色光及び青色光の各放射照度以上であることを特徴とする前記方法に係る。 In the present invention, the light emission dominant wavelengths are 700 to 800 nm (far red light), 600 to 700 nm (red light), and 400 to 500 nm (blue light), respectively, in a time zone in which sunlight is not irradiated on the plant. It is a plant cultivation method which irradiates the mixed light of these lights, Comprising: The said method characterized by the irradiance of far-red light being more than each irradiance of red light and blue light.
尚、本発明方法において、上記の各色光における分光分布曲線において、上記の各主波長範囲だけでなく、それより短波長域及び／又は長波長域にわたっていることが許容される。 In the method of the present invention, the spectral distribution curve for each color light described above is allowed not only to each of the above-mentioned main wavelength ranges but also to cover a shorter wavelength range and / or a longer wavelength range.
植物は、その光周性のタイプで分類すると、長日植物、短日植物及び中性植物に分けられるが、本発明において栽培の対象となる植物は、上記のいずれであってもよい。しかし、長日植物で最も大きな効果が得られるので、本発明は長日植物に対して特に好適である。なお、長日植物とは１日のうちの昼（明期）が長いとき、つまり夜（暗期）が短いときに開花が促進される植物である。短日植物とは１日のうちの昼（明期）が短いとき、つまり夜（暗期）が長いときに開花が促進される植物である。中性植物とはある程度成長すれば日長にあまり関係なく開花する植物である。 Plants are classified into long-day plants, short-day plants, and neutral plants when classified according to their photoperiodic type, but the plant to be cultivated in the present invention may be any of the above. However, since the greatest effect can be obtained with long-day plants, the present invention is particularly suitable for long-day plants. A long-day plant is a plant whose flowering is promoted when the daytime (light period) is long, that is, when the night (dark period) is short. A short-day plant is a plant whose flowering is promoted when the daytime (light period) of the day is short, that is, when the night (dark period) is long. A neutral plant is a plant that blooms to a certain extent regardless of day length.
本明細書において、「太陽光が照射されない時間帯」とは、現実に直射太陽光だけでなく、雲などによって太陽光の直射がない曇天下の日射を広く含むいわゆる日中であることを意味する。したがって、太陽光が照射されない時間帯は、季節および緯度により変化する。また、太陽光が照射されない時間帯は、厳密には日の入り後から日の出までの時間帯をいうが、本発明においては、厳密でなくてもよく、したがって日の出前後１〜２時間程度及び日の入り前後１〜２時間程度が含まれていてよいし、反対に含まれていなくてもよい。したがって、太陽光が照射されない時間帯を例えば１７：００〜０９：００とすることができる。更に、例えば、所謂「植物工場」のように、光源として太陽光を利用せずに人工照明だけで栽培するような環境下においては、栽培の全期間が「太陽光が照射されない時間帯」に該当するものと考えられる。 In this specification, the “time zone in which sunlight is not irradiated” means not only direct sunlight, but also so-called daylight that includes not only direct sunlight but also cloudy sunlight where there is no direct sunlight. To do. Therefore, the time zone when sunlight is not irradiated varies depending on the season and latitude. In addition, the time zone in which sunlight is not irradiated strictly refers to a time zone from after sunset to sunrise, but in the present invention, it may not be exact. Therefore, about 1 to 2 hours before and after sunrise and 1 before and after sunset. About 2 hours may be included, or may not be included on the contrary. Therefore, the time zone when sunlight is not irradiated can be set to, for example, 17:00 to 09:00. Further, for example, in an environment where the plant is cultivated only by artificial lighting without using sunlight as a light source, such as a so-called “plant factory”, the entire period of cultivation is in a “time zone in which sunlight is not irradiated”. It is considered to be applicable.
太陽光が照射される時間帯においては、植物の栽培に太陽光照射を利用することができるので、本発明による照射を植物に対して行う必要がない。しかし、太陽光が不足するときに行う補光照射法においては効果的である。 In the time zone in which sunlight is irradiated, it is not necessary to perform irradiation according to the present invention on plants because sunlight irradiation can be used for plant cultivation. However, it is effective in the supplementary light irradiation method performed when sunlight is insufficient.
本発明において、植物に光照射される際の放射照度は、植物体の茎頂部または栽培ベッド面上で計測した値で示される。なお、放射照度は、各波長のエネルギー強度を積分したものである。なお、放射照度は、複数箇所の測定値の平均値により求める。 In this invention, the irradiance at the time of light irradiation to a plant is shown by the value measured on the stem top part or cultivation bed surface of a plant body. The irradiance is obtained by integrating the energy intensity of each wavelength. In addition, irradiance is calculated | required by the average value of the measured value of several places.
本発明方法において、遠赤色光、赤色光及び青色光の各放射照度の大きさは、対象となる植物の種類及び栽培環境・目的等に応じて当業者が適宜選択することができる。例えば、遠赤色光の放射照度は、赤色光及び青色光の各放射照度の通常、夫々、1〜100倍、好ましくは1〜10倍である。 In the method of the present invention, the magnitude of each irradiance of far-red light, red light and blue light can be appropriately selected by those skilled in the art according to the type of plant to be targeted, the cultivation environment / purpose, and the like. For example, the irradiance of far-red light is usually 1 to 100 times, preferably 1 to 10 times, respectively, of each irradiance of red light and blue light.
又、波長域の植物体の茎頂部または栽培ベッド面上の遠赤色光の放射照度は、通常、0.1 〜100 Ｗ／ｍ２、好ましくは、1〜20 Ｗ／ｍ２、赤色光の放射照度は、通常、0.001〜100 Ｗ／ｍ２、好ましくは、0.1〜20 Ｗ／ｍ２、並びに、青色光の放射照度は、通常、0.001〜100 Ｗ／ｍ２、好ましくは、0.1〜20 Ｗ／ｍ２の範囲となるように光を照射する。 Moreover, the irradiance of far-red light on the stem top or the cultivation bed surface of the plant in the wavelength range is usually 0.1 to 100 W / m 2 , preferably 1 to 20 W / m 2 , and the irradiance of red light. Is usually 0.001 to 100 W / m 2 , preferably 0.1 to 20 W / m 2 , and the irradiance of blue light is usually 0.001 to 100 W / m 2 , preferably 0.1 to 20 W / m 2 . Light is irradiated so as to be in the range of m 2 .
更に、波長域の植物体の茎頂部または栽培ベッド面上の遠赤色光、赤色光及び青色光の放射照度の合計は、通常、0.1〜300 Ｗ／ｍ２、好ましくは、1〜60 Ｗ／ｍ２の範囲となるように光を照射する。尚、上記の範囲以上の放射照度を用いることもできる。 Furthermore, the sum of the irradiance of far-red light, red light and blue light on the shoot apex or the cultivation bed surface of the plant in the wavelength range is usually 0.1 to 300 W / m 2 , preferably 1 to 60 W / Light is irradiated so as to be in the range of m 2 . Irradiance exceeding the above range can also be used.
本発明による光照射は、照射時間帯の中において、連続照射および断続照射のいずれの態様であってもよい。連続照射の場合、明期延長法、暗期中断法、早朝照明法等を適用することができ、断続照射の場合、照射と消灯を繰り返すように光照射を行うことができる。これにより植物栽培効果を奏しながら省エネルギーを図ることができる。 The light irradiation according to the present invention may be either continuous irradiation or intermittent irradiation in the irradiation time zone. In the case of continuous irradiation, a light period extension method, a dark period interruption method, an early morning illumination method, or the like can be applied. In the case of intermittent irradiation, light irradiation can be performed so as to repeat irradiation and extinction. Thereby, energy saving can be aimed at, exhibiting a plant cultivation effect.
本発明による光照射を行うために用いる光源としては、例えば、特許文献１及び特許文献２に記載されたような当業者に公知の任意のものを使用することができる。波長選択が容易で、有効波長域の光エネルギーの占める割合が大きな光を放射する発光ダイオード等の人工光源が好適である。しかし、所望により発光ダイオード以外の放射源を用いることができる。 As a light source used for performing light irradiation according to the present invention, for example, any one known to those skilled in the art as described in Patent Document 1 and Patent Document 2 can be used. An artificial light source such as a light-emitting diode that emits light whose wavelength selection is easy and the ratio of light energy in the effective wavelength region is large is suitable. However, radiation sources other than light emitting diodes can be used if desired.
発光ダイオード以外の光源としては、例えば直管形およびコンパクト形の蛍光ランプや電球形蛍光ランプ、高圧放電ランプ、メタルハライドランプ等の当業者に公知の任意のもののほかに、今後開発される任意の光源を用いることが許容される。この場合、所望により所定波長域の光を選択的に利用するために光フィルタを組み合わせることが許容される。 As a light source other than the light emitting diode, in addition to an arbitrary light source known to those skilled in the art, such as a straight tube type and a compact type fluorescent lamp, a light bulb type fluorescent lamp, a high pressure discharge lamp, a metal halide lamp, etc., an arbitrary light source to be developed in the future Is permitted. In this case, it is allowed to combine optical filters in order to selectively use light in a predetermined wavelength region as desired.
尚、本発明において、太陽光が照射される時間帯において、太陽光照射が少ないときに、太陽光照射に加えて所望により本発明による光照射を並行して行うこともできる。この照射法は、補光照射法として知られているが、本発明の光照射の場合にも効果的である。 In addition, in this invention, when there is little sunlight irradiation in the time zone when sunlight is irradiated, in addition to sunlight irradiation, the light irradiation by this invention can also be performed in parallel if desired. This irradiation method is known as a supplementary light irradiation method, but is also effective in the case of the light irradiation of the present invention.
本発明による光照射を開始する時期は、特段限定されない。しかし、一般的には定植後からである。なお、所望により育苗中からの光照射、あるいは生育途中からの光照射も許容され、このような場合においても本発明の効果を得ることができる。 The time to start the light irradiation according to the present invention is not particularly limited. However, generally after planting. In addition, the light irradiation from the raising seedling or the light irradiation from the middle of the growth is allowed as desired, and the effect of the present invention can be obtained even in such a case.
太陽光照射と本発明による光照射を、それぞれの時間帯において行うための本発明の栽培装置に特別の構造は要求されない。すなわち、本発明による光照射用の光源は植物から十分に離間した位置に人工光源を取り付けることが可能になるので、人工光源を配置しても太陽光が十分に照射されるので、人工光源が上記照射の障害にならない。したがって、太陽光の照射のために特別な構造の栽培装置を採用する必要がない。 No special structure is required for the cultivation apparatus of the present invention for performing sunlight irradiation and light irradiation according to the present invention in respective time zones. That is, since the light source for light irradiation according to the present invention can attach the artificial light source at a position sufficiently separated from the plant, sunlight is sufficiently irradiated even if the artificial light source is arranged. Does not obstruct the above irradiation. Therefore, it is not necessary to employ a cultivation device having a special structure for irradiation with sunlight.
また、本発明による光照射は、太陽光照射の時間が短い時期や温度が植物の生育温度とかけ離れている時期に行うのが効果的である。したがって、本発明はハウス栽培と併用する場合に適している。すなわち、ハウス内の栽培しようとする植物の上方の離間した位置に人工光源、例えば発光ダイオードモジュール（照明装置）を配置することができる。なお、人工光源と植物の離間距離は、植物体の茎頂部または栽培ベッド面上において所定の放射照度が得られ、かつ太陽光が植物に照射され得る距離とするのがよい。 Moreover, it is effective to perform the light irradiation according to the present invention at a time when the solar irradiation time is short or when the temperature is far from the growth temperature of the plant. Therefore, this invention is suitable when using together with house cultivation. That is, an artificial light source, for example, a light emitting diode module (illuminating device) can be arranged at a spaced position above the plant to be cultivated in the house. The distance between the artificial light source and the plant is preferably a distance at which a predetermined irradiance can be obtained on the stem top or the cultivation bed surface of the plant body and the plant can be irradiated with sunlight.
従って、本発明の栽培装置は、例えば、特許文献１及び特許文献２に記載された装置に準じて構成することができる。 Therefore, the cultivation apparatus of this invention can be comprised according to the apparatus described in patent document 1 and patent document 2, for example.
本発明においては、既述のように植物の栽培において所定波長域に発光主波長を有し、かつ所定放射照度の光を照射することにより、所期の効果が得られるものである。したがって、それ以外の栽培方法の条件に特に制約はなく、当業者が適宜設定（例えば、栽培温度５〜４０℃の範囲等）することができる。 In the present invention, as described above, the desired effect can be obtained by irradiating light having a predetermined emission wavelength and a predetermined irradiance in the cultivation of plants. Therefore, there is no restriction | limiting in particular in the conditions of other cultivation methods, and those skilled in the art can set suitably (for example, the range of 5-40 degreeC cultivation temperature, etc.).
例えば、栽培装置として、照明装置のほかに、暖房装置及び冷房装置が付設されていて植物の周囲温度を植物の生育に好ましい５〜４０℃の範囲内に保持できるように構成されているガラス温室やプラスチックハウスなどを利用することができる。 For example, as a cultivation device, in addition to the lighting device, a heating device and a cooling device are attached so that the ambient temperature of the plant can be maintained within a range of 5 to 40 ° C. preferable for plant growth. Or a plastic house.
以下に、実施例及び比較例を示して本発明方法を具体的に説明するが、これらの実施例は本発明の理解をより確実にするためのものであって、本発明はこれらにより限定されるものではないことは明らかである。 Hereinafter, the method of the present invention will be described in detail with reference to Examples and Comparative Examples. However, these Examples are for the purpose of ensuring a better understanding of the present invention, and the present invention is limited thereto. Obviously it is not.
５号鉢に植えたシュッコンカスミソウを用いて栽培試験を行い、本発明方法による開花率の変動を観察した。実験は温度を生育に好適に調節したガラス温室内で行った。 Cultivation tests were carried out using gypsophila planted in No. 5 pot, and the change in flowering rate by the method of the present invention was observed. The experiment was carried out in a glass greenhouse where the temperature was suitably adjusted for growth.
試験区として、発光主波長700〜800ｎｍの遠赤色（FR）発光ダイオード、発光主波長600〜700ｎｍの赤色（R）発光ダイオード、及び発光主波長400〜500ｎｍの青色（B）発光ダイオードを栽培ベッド面から100〜150ｃｍの位置に設置した。昼間（９：００〜１７：００）は自然光下で栽培し、夜間の太陽光が照射されない時間帯（１７：００〜９：００）は被覆して太陽光を完全に遮光し、各光源で電照し、毎週、開花率を求めた。各光の放射照度は次の通りである。(図１の上図：D)FR：3.5, R：1.0, B：0.2（単位：Ｗ／ｍ２）。(図１の下図：E)FR：10, R：6, B：4,白熱電球：25（単位：Ｗ／ｍ２）。ここで、「開花率」は以下のように計算して得られる値である：
開花率（％）＝ （開花個体数／供試個体数）×100
尚、対照区として、無電照区を設けた。
As a test plot, a far-red (FR) light-emitting diode with a main emission wavelength of 700 to 800 nm, a red (R) light-emitting diode with a main emission wavelength of 600 to 700 nm, and a blue (B) light-emitting diode with a main emission wavelength of 400 to 500 nm It installed in the position of 100-150cm from the surface. During the daytime (9:00 to 17:00), the plant is cultivated under natural light, and during the nighttime period (17:00 to 9:00) when sunlight is not irradiated, the sunlight is completely shielded by each light source. Illuminated and determined the flowering rate every week. The irradiance of each light is as follows. (Upper drawing of FIG. 1: D) FR: 3.5, R: 1.0, B: 0.2 (unit: W / m 2 ). (Lower figure of FIG. 1: E) FR: 10, R: 6, B: 4, Incandescent bulb: 25 (unit: W / m 2 ). Here, "flowering rate" is a value obtained by calculating as follows:
Flowering rate (%) = (number of flowering individuals / number of test individuals) x 100
In addition, a non-lighted zone was provided as a control zone.
［実験結果］
その結果を図１に示した。上図（D）から、３色混合（FR+R+B）が２色混合（FR+B、又は、FR+R）よりも優れていることがわかる。更に、FR+Bの開花は非常に遅く、図の範囲内では開花率はゼロである。更に、３色光を適当な割合で混合することによって、白熱電球を上回る開花促進効果を得ることができた（下図：E）。Eの３色混合では、白熱電球より低い放射照度で白熱電球より高い開花率を示している（消費電力は、さらにかなり低くなる）。更に、図２として、図１（D）において、２色（FR+R）混合光を用いて栽培したシュッコンカスミソウ（図２：左）、及び、３色混合光を用いて栽培したシュッコンカスミソウ（図２：右）を撮影した写真を示す。明らかに、３色混合光を用いて栽培したシュッコンカスミソウの開花が促進されていることがわかる。
[Experimental result]
The results are shown in FIG. From the upper diagram (D), it can be seen that the three-color mixture (FR + R + B) is superior to the two-color mixture (FR + B or FR + R). Furthermore, FR + B flowering is very slow, and the flowering rate is zero within the figure. Furthermore, by mixing three colors of light at an appropriate ratio, it was possible to obtain a flowering promotion effect that exceeded that of incandescent bulbs (lower figure: E). The three-color mixture of E shows a higher flowering rate than incandescent bulbs at lower irradiance than incandescent bulbs (power consumption is much lower). Furthermore, as FIG. 2 (D) in FIG. 1 (D), Gypsophila cultivated using two-color (FR + R) mixed light (FIG. 2: left), and shoot-cultivated using three-color mixed light. A photograph of gypsophila (Figure 2: right) is shown. Obviously, flowering of Gypsophila grown using three-color mixed light is promoted.
切り花類や野菜などでは、開花を制御する技術は、価格の高い時期に出荷するなど収益性を上げるために重要である。本発明はそのための効率的な開花促進方法である。さらに、省エネの面で問題があり、生産が中止となる白熱電球を用いた電照栽培にかわり、適切な電照方法を提案する発明でもある。 For cut flowers and vegetables, technology to control flowering is important to increase profitability, such as shipping at high prices. The present invention is an efficient flowering promotion method for that purpose. Furthermore, there is a problem in terms of energy saving, and it is also an invention that proposes an appropriate lighting method instead of lighting cultivation using an incandescent bulb whose production is discontinued.
Claims (7)
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| JP2013230122A (en) * | 2012-05-01 | 2013-11-14 | Shimane Univ | Method for cultivating vegetable and fruit |
| WO2014183479A1 (en) * | 2013-05-16 | 2014-11-20 | 邯郸市盛德技术玻璃有限公司 | Photosynthetic light-conversion glass plane light source using solar light and artificial light |
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| KR101658032B1 (en) * | 2014-12-15 | 2016-09-21 | (주)썬웨이브 | Led lighting apparatus for inducing and promoting flowering of long-day plant |
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