JPH1166A - Plant culturing method and apparatus therefor - Google Patents
Plant culturing method and apparatus thereforInfo
- Publication number
- JPH1166A JPH1166A JP9171180A JP17118097A JPH1166A JP H1166 A JPH1166 A JP H1166A JP 9171180 A JP9171180 A JP 9171180A JP 17118097 A JP17118097 A JP 17118097A JP H1166 A JPH1166 A JP H1166A
- Authority
- JP
- Japan
- Prior art keywords
- plant
- root
- cultivation
- culture solution
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Landscapes
- Hydroponics (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、人工光源によ
り、野菜類や花、草等を水耕栽培する植物栽培方法及び
装置に関する。さらに、この発明は、栽培槽の内部の培
養液に炭酸ガス濃度の高い空気をポンプにより強制的に
吹き込んで腐敗させることなく、きわめて効果的に植物
を生育させることができるようにした植物栽培方法およ
び栽培装置の改良に関するものであって、根の生育が十
分に行われるように工夫したものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant cultivation method and apparatus for hydroponically cultivating vegetables, flowers, grasses and the like using an artificial light source. Further, the present invention provides a plant cultivation method capable of growing a plant very effectively without causing spoilage by forcibly blowing air having a high carbon dioxide concentration into a culture solution inside a cultivation tank by a pump. And improvement of a cultivation apparatus, which is devised so that roots can be sufficiently grown.
【0002】[0002]
【従来の技術】天然土壌と太陽光線を利用しないで植物
を生育させる水耕栽培方法及び装置は数々知られてい
る。例えば、特開昭62−55028号公報〜特開昭6
2−55029号公報や、本発明者が開発した特開昭6
3−240731号公報、特公平6−61190号公
報、特開平7−50929号公報、特開平7−5094
1号公報に記載の構成のものが知られている。2. Description of the Related Art There are many known hydroponic cultivation methods and apparatuses for growing plants without using natural soil and sunlight. For example, JP-A-62-55028 to JP-A-6-55028
2-55029 and Japanese Unexamined Patent Publication No.
JP-A-3-240731, JP-B-6-61190, JP-A-7-50929, JP-A-7-5094
The configuration described in Japanese Patent Laid-Open Publication No. HEI 1 (1999) is known.
【0003】上記した従来の発明は、水耕栽培の光源と
して蛍光灯を使用し、しかも蛍光灯の位置を植物の生育
に伴って移動させ、植物の上端部と蛍光灯の間隔を所定
の範囲内に保つようにしたものである。また、必要に応
じて栽培室内の雰囲気を、炭酸ガスの濃度を500ppm以
上、好ましくは1,000 〜5,000ppmに維持するようにした
ものである(特開平63−240731号公報、特公平
6−61190号公報参照。)。[0003] The above-mentioned conventional invention uses a fluorescent lamp as a light source for hydroponic cultivation, and further moves the position of the fluorescent lamp as the plant grows so that the distance between the upper end of the plant and the fluorescent lamp is within a predetermined range. It is intended to be kept within. If necessary, the atmosphere in the cultivation room is maintained at a carbon dioxide gas concentration of 500 ppm or more, preferably 1,000 to 5,000 ppm (JP-A-63-240731, JP-B-6-61190). Gazette.).
【0004】そして、従来の栽培装置は、「根の発育に
は十分な酸素が必要である」と考えられていたので、図
3に示すように植物を支持する育成台と前記培養液に間
には1〜3cmの空気層Aを設けるのが通常であった。
しかし、この構造は植物の根の部分で空気中にさらされ
ている部分が存在することになり、空気中では根が発育
することは殆どないので植物の根の発育のためには好ま
しくない。根が十分に発育することは植物を丈夫にする
こととなり、植物の葉の生育に大きく影響することとな
るので植物の栽培には重要なことである。[0004] Conventional cultivation equipment was thought to require "sufficient oxygen for root development". Therefore, as shown in FIG. Was usually provided with an air layer A of 1 to 3 cm.
However, this structure is unfavorable for the growth of plant roots, since there is a part of the root of the plant that is exposed to the air, and the root hardly develops in the air. Sufficient root development is important for plant cultivation because it makes the plant robust and greatly affects the growth of plant leaves.
【0005】それにも拘わらず、従来は植物の根を根元
まで浸すと根への酸素の供給が不足するので、根腐れを
起こすと考えられていた。また、前記従来の構造は前記
空気層を設けるため水耕液と育成台の間に若干の距離が
必要となるので、栽培層の側面等において育成台の構造
が人工光源に対する遮光性が十分でないものとなり、前
記培養液中に光が漏れ込んで植物栽培に有害な藻が発生
する欠点があった。[0005] Nevertheless, it has heretofore been thought that if the roots of a plant are immersed to the root, the supply of oxygen to the roots becomes insufficient, causing root rot. In addition, since the conventional structure requires a slight distance between the hydroponic solution and the growing table to provide the air layer, the structure of the growing table on the side of the cultivation layer or the like does not have sufficient light-shielding properties against artificial light sources. There is a drawback that light leaks into the culture solution to generate algae harmful to plant cultivation.
【0006】[0006]
【発明が解決しようとする課題】この発明は、植物の根
元まで十分に培養液に浸しても根腐れを起こすことなく
根の発育を促進すると共に、根の発育に必要な酸素の供
給も十分に行え、かつ微生物の発生も抑制される構造の
水耕栽培方法及び装置を提供することを目的とする。ま
た、根元まで培養液に浸せるので根に対する遮光性のよ
い構造を採用することにより、有害な藻の発生を防止す
ることを目的とする。SUMMARY OF THE INVENTION The present invention promotes root growth without causing root rot even when the plant is sufficiently immersed in a culture solution, and also provides sufficient oxygen supply for root development. It is an object of the present invention to provide a hydroponic cultivation method and apparatus having a structure that can be performed easily and the generation of microorganisms is suppressed. Another object of the present invention is to prevent the generation of harmful algae by adopting a structure having good light-shielding properties for roots because the root can be immersed in a culture solution.
【0007】[0007]
【課題を解決するための手段】上記課題を解決するため
に、この発明は肥料成分を含有する培養液に植物の根を
浸し、植物の栽培期間中継続的に上記培養液中に炭酸ガ
ス濃度の高い空気をポンプにより強制的に吹き込みなが
ら植物を生育する人工光源を用いた植物栽培方法におい
て、常時植物の根を根元まで十分に上記培養液に浸した
構成を採用している。そして、前記培養液中に空気を強
制的に吹き込むことにより、栽培植物の直下近辺から気
泡を発生させている。Means for Solving the Problems To solve the above problems, the present invention immerses plant roots in a culture solution containing a fertilizer component, and continuously increases the concentration of carbon dioxide gas in the culture solution during plant cultivation. In a plant cultivation method using an artificial light source for growing plants while forcibly blowing high air with a pump, a configuration is employed in which the roots of the plants are always sufficiently immersed in the culture solution up to the roots. Then, bubbles are generated from immediately below the cultivated plant by forcibly blowing air into the culture solution.
【0008】前記空気の炭酸ガス濃度は500ppm以上、好
ましくは 1,000〜5,000ppmであり、また前記人工光源と
して蛍光灯を用い、植物育成室内の全ての内面を反射層
で覆って最小限の光量で植物を育成している。さらに、
肥料成分を含有する培養液に植物の根を浸し、植物の栽
培期間中継続的に上記培養液中に空気をポンプにより強
制的に吹き込みながら植物を生育する人工光源を用いた
植物栽培装置において、上記栽培中植物を支持する植物
育成板を十分遮光性を有する構造とし、前記人工光源の
光が前記培養液に到達しないようにした植物栽培装置と
している。The air has a carbon dioxide concentration of 500 ppm or more, preferably 1,000 to 5,000 ppm, and a fluorescent lamp is used as the artificial light source. Growing plants. further,
In a plant cultivation device using an artificial light source that grows plants while forcibly blowing air into the culture solution by a pump continuously during the cultivation period of the plant, immersing the roots of the plant in a culture solution containing a fertilizer component, The plant cultivation plate supporting the plant during cultivation has a structure having sufficient light-shielding properties, and the plant cultivation apparatus is configured such that the light of the artificial light source does not reach the culture solution.
【0009】[0009]
【発明の実施の形態】水耕栽培、特に根菜類の水耕栽培
においては、熱障害(チップ・バーン)の発生が問題で
ある。チップ・バーンは、人工照明が強過ぎて葉が縮れ
たようになって枯れてしまう現象であり、全体が枯れな
いまでも部分的にチップ・バーンが起きてしまうと栽培
する根菜類の商品価値がなくなってしまうので、水耕栽
培においては葉の先端部分でさえもチップ・バーンを起
こさないように十分注意することが重要である。DESCRIPTION OF THE PREFERRED EMBODIMENTS In hydroponic cultivation, particularly in hydroponic cultivation of root crops, the occurrence of heat damage (chip burn) is a problem. Chip burn is a phenomenon in which artificial lighting is too strong and leaves shrink as the leaves shrink, and if the chip burn occurs partially even if the whole does not wither, the commercial value of the root vegetables cultivated In hydroponics, it is important to take great care not to cause chip burn even at the tip of the leaf.
【0010】高圧ナトリューム灯やメタルハロイド灯等
熱発生量の多い人工光源を用いた水耕栽培は、たいてい
この熱障害の発生を解決できず失敗している。チップ・
バーンは、人工光源の熱が葉の表面に蓄積し、この蓄積
された熱の発散が十分行われずに葉の表面が痛むものと
考えられ、自然光(太陽)の場合は生じない水耕栽培特
有の現象である。したがって、上記熱の蓄積が行われな
いように、人工光源の光の植物生育への寄与効率を極力
高くして人工光源による熱の発生(特に輻射熱)を少な
くすると共に、葉の表面からの熱の放散が十分行われれ
ばチップバーンを防止することができる。[0010] Hydroponic cultivation using an artificial light source that generates a large amount of heat, such as a high-pressure sodium lamp or a metal halide lamp, usually fails because the occurrence of the heat damage cannot be solved. Tip ・
Burn is considered to cause the heat of the artificial light source to accumulate on the surface of the leaves, and the accumulated heat is not sufficiently dissipated, causing the surface of the leaves to hurt. This is the phenomenon. Therefore, in order to prevent the accumulation of heat, the efficiency of contribution of the light of the artificial light source to plant growth is increased as much as possible to reduce the generation of heat (particularly radiant heat) by the artificial light source and to reduce the heat from the leaf surface. If the heat is sufficiently dissipated, chip burn can be prevented.
【0011】従来、この熱障害を防止するため、植物の
中心に冷気を吹き付ける方法や照射時間を間欠的にし
て、照射を停止する時間(いわゆる、夜)を与えること
が行われている。しかし、前者は電力消費の増大と共に
植物に風を与えることが植物の生育を阻害し、後者の場
合は照射を停止する時間は光合成が行われないので、植
物の成長が遅くなる欠点がある。Conventionally, in order to prevent this thermal damage, a method of blowing cold air to the center of a plant or an intermittent irradiation time to give time to stop irradiation (so-called night) has been performed. However, the former has a drawback that the growth of the plant is slowed because the application of wind to the plant with the increase in power consumption inhibits the growth of the plant, and in the latter case, the photosynthesis is not performed during the time when the irradiation is stopped.
【0012】このため発明者は、先に栽培のための生育
室内面の上下左右なるべく多くの表面をアルミ箔等の反
射層で覆い、上記人口光源の光の光合成への寄与率を高
める工夫をしている(例えば、特開平7−50941号
公報)。なお、上記人工光源としては発熱量の少ない蛍
光灯、それも実験の結果、スペクトル分布が植物の生育
に最も適していると思われる3波長蛍光灯を用いてい
る。For this reason, the inventor of the present invention has previously devised a method for covering as much as possible the upper, lower, left and right surfaces of the inside of a growing room for cultivation with a reflective layer of aluminum foil or the like so as to increase the contribution of the artificial light source to photosynthesis. (For example, Japanese Patent Application Laid-Open No. 7-50941). As the artificial light source, a fluorescent lamp having a small calorific value and a three-wavelength fluorescent lamp whose spectral distribution is considered to be most suitable for the growth of plants as a result of experiments are used.
【0013】多重反射を利用して使用する人工光源の上
記光合成への寄与率を最大限に上げることは相対的に使
用する人工光源の光量(光源の本数)を減らすことにな
り、電力消費を少なくすると共に人工光源からの熱の発
生を極力少なくする効果がある。同時に、光量が少ない
と人工光源の輻射熱の影響が小さいので、該光源を植物
に近接して設けても熱障害を起こさない効果がある。光
源を植物の直ぐ上に設けられることは栽培槽のスペース
もその分小さくできることになる。[0013] Increasing the contribution rate of the artificial light source used by utilizing multiple reflections to the above-mentioned photosynthesis maximizes the light amount (the number of light sources) of the artificial light source to be used relatively, thereby reducing power consumption. This has the effect of reducing heat generation from the artificial light source as much as possible. At the same time, if the amount of light is small, the influence of the radiant heat of the artificial light source is small, so that even if the light source is provided close to the plant, there is an effect that no thermal damage occurs. Providing the light source directly above the plant can also reduce the space in the cultivation tank.
【0014】一方、植物は根の発育が十分であると、養
分と共に根から水分をよく吸い上げて葉からの蒸発量も
増えるものと考えられる。葉の表面からの蒸発が多けれ
ば葉の表面の温度が蒸発熱によって低下し、熱障害を回
避することができる。従来、根の発育のためには、根の
部分に対する酸素の供給が必要と考えられ、水耕栽培に
おいては図3に示すように植物の根の上部の部分を空気
層Aに露出する構成が一般的であった。しかし、根の発
育のためには、根の大部分が水中に没している方がよい
ことは明らかである。この場合、根への酸素の供給及び
根腐れ防止が問題となる。[0014] On the other hand, it is considered that when a plant has sufficient root development, water is well absorbed from the root together with nutrients, and the amount of evaporation from leaves increases. If there is a lot of evaporation from the leaf surface, the temperature of the leaf surface will be reduced by the heat of evaporation, so that thermal damage can be avoided. Conventionally, it is considered that oxygen needs to be supplied to the root portion for root growth. In hydroponic cultivation, a configuration in which the upper portion of the plant root is exposed to the air layer A as shown in FIG. Was common. However, it is clear that most of the roots should be submerged in water for root development. In this case, supply of oxygen to the root and prevention of root rot become problems.
【0015】発明者は、先に培養液中に炭酸ガス濃度の
高い空気をポンプにより強制的に送り込んで培養液の腐
敗を防止する技術を開発した(特公平6−61190号
公報)。この方法を用いると、炭酸ガスと共に酸素も常
時培養液中に供給されるので、根元の部分まで培養液中
に浸っても根への酸素供給は十分に行われる。すなわ
ち、上記炭酸ガス濃度の高い空気といえども根の発育に
必要な酸素を十分含んでいるので、根への酸素供給も十
分行われるのである。The inventor has previously developed a technique for forcibly sending air having a high carbon dioxide concentration into a culture solution by a pump to prevent the culture solution from spoiling (Japanese Patent Publication No. 6-61190). When this method is used, oxygen is always supplied to the culture solution together with carbon dioxide gas, so that oxygen is sufficiently supplied to the roots even if the root portion is immersed in the culture solution. In other words, even the air having a high carbon dioxide concentration contains sufficient oxygen necessary for root growth, so that oxygen is sufficiently supplied to the roots.
【0016】この発明は、この観点に基づき、培養液中
に炭酸ガス濃度の高い空気をポンプにより常時継続的に
かつ強制的に送り込む水耕栽培方法において、常時植物
の根を根元まで培養液中に浸して根の発育を十分促進さ
せるものである。根の十分な発育によって葉も十分成長
することになり、丈夫な葉はその表面からの水分の蒸発
が活発なので、蒸発熱により葉の表面からの熱の放散が
促進される。これによって、チップ・バーン現象が防止
され、このことはさらに植物をよりよく生育させること
につながるという良循環が機能することになる。Based on this viewpoint, the present invention provides a hydroponic cultivation method in which air having a high carbon dioxide concentration is constantly and forcibly fed into a culture solution by a pump. Soaked in water to sufficiently promote root development. Sufficient root development allows the leaf to grow sufficiently, and the durable leaf has a high rate of water evaporation from its surface, and the heat of evaporation promotes the dissipation of heat from the leaf surface. This prevents the chip burn phenomenon, which leads to a good circulation, which leads to better plant growth.
【0017】そして、前記酸素供給がよく行わわれると
共に、根の直下から常に泡状の空気が根の中に浸透する
ので根の活性化が図られる。また、前記炭酸ガス濃度が
濃いためによる水耕液の酸性化や上記泡状空気の攪拌作
用が液中の微生物等の発生を抑制するため、この発明に
よる水耕栽培方法は、前記十分な酸素供給とあいまっ
て、植物の根の部分が根元まで常時水に浸っているにも
拘わらず根腐れを起こすことがない。逆に、前述の如
く、根をどっぷり水耕液中に浸すことにより従来あり得
ないほど根の発育が促進され、このことにより植物の生
育がよくなると共に、根からの水分の吸収、及び葉から
の蒸発が良くなり、熱の放散が促進され、チップ・バー
ンが抑止されることになる。これはさらに、従来苦労し
ていた、葉の表面からの熱の放散の問題を楽にし、従っ
て蛍光灯を植物の直近まで近ずけること(光の有効利用
が図れる)を可能にし、栽培層の多重反射の利用とあい
まって人工光栽培のコストの半分以上を占める電力使用
量を大幅に減らすことに成功した。In addition to the above-mentioned oxygen supply, the roots are activated because foamy air always permeates into the roots from directly below the roots. Further, the acidification of the hydroponic solution due to the high carbon dioxide gas concentration and the stirring action of the foamy air suppress the generation of microorganisms and the like in the liquid. Together with the supply, the root of the plant does not rot even though the root is constantly immersed in water. Conversely, as described above, immersing the roots completely in the hydroponic solution promotes the growth of the roots to an extent never before possible, thereby improving the growth of the plant, absorbing water from the roots, and removing the roots from the leaves. Is improved, heat dissipation is promoted, and chip burn is suppressed. This further eases the problem of dissipating heat from the leaf surface, which has traditionally been a challenge, and thus allows the fluorescent light to be brought closer to the plant (effective use of light). Combined with the use of multiple reflections, the power consumption, which accounts for more than half of the cost of artificial light cultivation, has been significantly reduced.
【0018】また、根を根元までどっぷり培養液中に浸
す構造を採れば、育成台と根の部分の間の空間が不要と
なるため、育成台の付近の遮光構造が十分なものとなり
培養液中への光の進入が防止できるという副次的効果が
ある。水耕栽培においては、培養液に光が射し込むと不
要な藻の発生が生じ、栄養分が取られると共に枯れた藻
が不純物となって腐敗したりするので植物の生育を妨げ
ることになる。また、光が根の部分に当たること自体も
根の発育に障害となる。Further, if a structure is adopted in which the roots are completely immersed in the culture medium up to the roots, the space between the growing table and the root portion becomes unnecessary, so that the light-shielding structure near the growing table becomes sufficient and the culture medium becomes There is a secondary effect that light can be prevented from entering inside. In hydroponic cultivation, when light is irradiated on the culture solution, unnecessary algae are generated, and nutrients are taken out, and withered alga becomes an impurity and rots, thereby hindering the growth of plants. In addition, the fact that the light hits the root itself also hinders the growth of the root.
【0019】さらに、栽培室の置かれている環境(通常
はビル内、あるいはコンクリート製工場内)は植物の生
育のためには15〜19℃が好ましいので、該温度に空
調されているが、栽培室は内面が全て反射板で覆われて
いて密閉構造であり、しかも人工光源が内部に設置され
ているので外気より温度が高くなる。別途、同じ出願人
の提案にあるように、この栽培室内の温度上昇を極力防
止するため、栽培槽両側面反射板の上下、及び栽培槽床
および天井反射板の両サイドが若干の隙間が空けてあ
る。前記栽培室内の熱せられた空気は該隙間から自然に
外部に放出されて栽培室内の温度上昇が妨げられる。Furthermore, the environment in which the cultivation room is located (usually in a building or a concrete factory) is preferably at 15 to 19 ° C. for plant growth, and is therefore air-conditioned to that temperature. The cultivation room has a closed structure in which the inner surface is entirely covered with a reflector, and the temperature is higher than outside air because the artificial light source is installed inside. Separately, as suggested by the same applicant, in order to prevent the temperature inside the cultivation chamber from rising as much as possible, there is a slight gap between the upper and lower sides of the reflector on both sides of the cultivation tank and both sides of the cultivation tank floor and the ceiling reflector. It is. The heated air in the cultivation room is naturally discharged to the outside from the gap, thereby preventing a temperature rise in the cultivation room.
【0020】また、この発明の装置においては、炭酸ガ
スを含む空気が培養液中から発生して葉の裏部分に向か
って下から上へ気流が発生することになり、葉の表面を
空冷する効果がある。実際、栽培室の温度より、葉の表
面の温度は1〜2℃低いと考えられる。Further, in the apparatus of the present invention, air containing carbon dioxide gas is generated from the culture solution, and an airflow is generated from the bottom toward the back of the leaf, thereby air-cooling the surface of the leaf. effective. In fact, the temperature of the leaf surface is considered to be 1-2 ° C. lower than the temperature of the cultivation room.
【0021】以下に本発明を図面の実施例に基づいて詳
細に説明する。図1は本発明に用いられる植物栽培装置
の実施例を示す全体構成図であり、図2は培養液の循環
路を含む栽培槽の外観図、図3は上記構成の従来例の部
分詳細図である。図4は同様に、この発明の場合の上記
構成の部分詳細図であり、図5は上記図4を縦方向から
見た栽培槽の横断面図である。図6はこの発明の栽培槽
装置に用いられる育成台の斜視図である。図1,図2に
おいて、1は塩化ビニール製の長方形箱状の栽培槽であ
る。該栽培槽は、断面半円径の樋状栽培槽でもよい。該
栽培槽は、建物2内に支持台2’によって間隔をおいて
2段重ねで水平に設置されている。図1においては、簡
単のため2段しか図示されていないが、実際の量産化体
制の植物工場では部屋内の床から天井まで置けるだけの
段数が設置されるので、通常は6〜8段となる。3は、
最上段の栽培槽1に培養液を供給する循環ポンプであ
る。Hereinafter, the present invention will be described in detail with reference to embodiments of the drawings. 1 is an overall configuration diagram showing an embodiment of a plant cultivation apparatus used in the present invention, FIG. 2 is an external view of a cultivation tank including a circulation path of a culture solution, and FIG. 3 is a partial detailed view of a conventional example of the above configuration. It is. FIG. 4 is a partially detailed view of the above-described configuration in the case of the present invention, and FIG. 5 is a cross-sectional view of the cultivation tank when FIG. 4 is viewed from the vertical direction. FIG. 6 is a perspective view of a growing table used in the cultivation tank device of the present invention. 1 and 2, reference numeral 1 denotes a rectangular box-shaped cultivation tank made of vinyl chloride. The cultivation tank may be a gutter-shaped cultivation tank having a semicircular cross section. The cultivation tanks are horizontally installed in a two-tiered manner at intervals by a support 2 ′ in the building 2. In FIG. 1, only two stages are shown for simplicity. However, in a plant factory of an actual mass production system, the number of stages that can be set from the floor to the ceiling in the room is set, and therefore, usually 6 to 8 stages. Become. 3 is
It is a circulation pump that supplies a culture solution to the top cultivation tank 1.
【0022】図3に示される従来例の水耕液の循環は以
下のとおりである。循環ポンプにより供給された培養液
は下段の栽培槽1へサイホン4により自然落下して、ポ
ンプ3によりまた上段の栽培槽に戻る過程を経て栽培槽
内を循環する。栽培槽1内における培養液の水位はサイ
ホン4によって一定に保たれる。循環ポンプ3は連続も
しくは一定時間間隔(例えば、15分)で自動的に運転
させる。ポンプにより培養液が上段栽培槽に送られる
と、図3において、サイホンの上限水位Hまで上段の水
位は上昇し循環ポンプ3は停止する。その後、下限水位
Lにある下段栽培槽に対して培養液の自然排出が生じ、
上段栽培槽の水位がサイホンの調節下限水位Lになる
と、上記排出が停止する。この下限水位になっても根の
根元が培養液中に没しているように水位が調節されてい
る。サイホンを用いないで、1〜2日に上記培養液を全
部交換する方式もある。この全交換方式の方が常時は前
記培養液の動きがないので、根の生育には好ましい。The circulation of the hydroponic solution of the conventional example shown in FIG. 3 is as follows. The culture solution supplied by the circulation pump naturally falls into the lower cultivation tank 1 by the siphon 4 and circulates in the cultivation tank through the process of returning to the upper cultivation tank by the pump 3 again. The water level of the culture solution in the cultivation tank 1 is kept constant by the siphon 4. The circulation pump 3 is automatically operated continuously or at regular time intervals (for example, 15 minutes). When the culture solution is sent to the upper cultivation tank by the pump, the water level of the upper stage rises to the upper limit water level H of the siphon in FIG. 3 and the circulation pump 3 stops. Thereafter, spontaneous discharge of the culture solution occurs in the lower cultivation tank at the lower limit water level L,
When the water level in the upper cultivation tank reaches the lower control limit water level L of the siphon, the discharge stops. The water level is adjusted so that the root of the root is submerged in the culture solution even at the lower limit water level. There is also a method in which the above culture solution is entirely exchanged for one or two days without using a siphon. The whole exchange method is preferable for root growth because the culture solution does not always move.
【0023】この発明における水耕液の供給の一例は以
下のようになる。循環ポンプにより連続的に最上段に供
給された培養液は、図4に示すように、各段において水
位調整用の管51によりオーバーフロー分が下段の栽培
槽へ自然落下して、ポンプ3によりまた上段の栽培槽に
戻る過程を経て栽培槽内を循環する。この発明における
栽培槽1各段内における培養液の深さは図4,図5に示
す如く、育成台10の底部が浸る位の水位に保たれ、こ
の水位は上記水位調整用の管51によって一定に保たれ
る。An example of the supply of the hydroponic solution according to the present invention is as follows. As shown in FIG. 4, in the culture solution continuously supplied to the uppermost stage by the circulation pump, as shown in FIG. It circulates in the cultivation tank through the process of returning to the upper cultivation tank. As shown in FIGS. 4 and 5, the depth of the culture solution in each stage of the cultivation tank 1 according to the present invention is maintained at a water level at which the bottom of the cultivation table 10 is immersed, and the water level is controlled by the water level adjustment pipe 51. Be kept constant.
【0024】栽培槽1内には、図2に示されるように、
育成台10を移動可能に支える支持片8が設けられてお
り、支持片8は培養液が育成台の底面に浸る位の水位と
なっても該支持片が培養液に没しないようにやや高めの
位置に設けられている。従って、図6に示されるよう
に、育成台10は細長い形状をしていて、長手方向の中
央部がやや凹んだ構造のものが用いられる。栽培槽内で
は、この育成台10が図2に示されるように両端を前記
支持片8に、あるいは図5に示すように栽培槽の上端に
支持されて横方向に自由にスライドできるように隙間を
空けずに配置されている。該育成台10は、上面にステ
ンレス、アルミ等の反射部材13を有する金属や樹脂部
材からなり、苗11を挿入する孔12を有する。例えば
レタスの場合は、上記孔12は育成台に3つ設けられて
いて、双葉から本葉2〜3枚出た状態になった根部上部
をウレタン等(図5の55)で巻き付けて、前記孔に挿
入する。このように、通常は横3列で育成される。In the cultivation tank 1, as shown in FIG.
A support piece 8 for supporting the breeding table 10 so as to be movable is provided. The support piece 8 is slightly raised so that the support piece does not sink in the culture solution even when the culture solution reaches a water level at which the culture solution is immersed in the bottom surface of the growth table. Is provided at the position. Therefore, as shown in FIG. 6, the growth table 10 has an elongated shape and has a structure in which a central portion in the longitudinal direction is slightly concave. In the cultivation tub, a gap is provided so that the breeding table 10 is supported on the support pieces 8 at both ends as shown in FIG. 2 or at the upper end of the cultivation tub as shown in FIG. Are arranged without leaving an empty space. The breeding table 10 is made of a metal or resin member having a reflective member 13 such as stainless steel or aluminum on the upper surface, and has a hole 12 into which the seedling 11 is inserted. For example, in the case of lettuce, three holes 12 are provided on the breeding table, and the upper part of the root, which is in a state where two or three true leaves protrude from Futaba, is wrapped with urethane or the like (55 in FIG. 5). Insert into the hole. As described above, usually, they are grown in three rows.
【0025】上記反射部材は人工光源の光を反射し、少
ない光量を有効に活用して電力消費を最小化すると共
に、人工光源の熱の発生を極力少なくしてチップバーン
を防止している。図3に示されるように、育成台10の
下端には光進入防止板14が設けられている。この光進
入防止板14は、苗の根は光が当たって育成障害を起こ
すことや培養液に光が入って培養液中に藻が発生してし
まうことを防止している。The above-mentioned reflecting member reflects the light of the artificial light source, effectively utilizes a small amount of light to minimize power consumption, and minimizes the generation of heat of the artificial light source to prevent chip burn. As shown in FIG. 3, a light entrance preventing plate 14 is provided at a lower end of the breeding table 10. The light entry prevention plate 14 prevents the roots of the seedlings from being exposed to light and causing a growth disorder, and preventing the light from entering the culture solution and generating algae in the culture solution.
【0026】各栽培槽1、1の上部にはそれぞれ2本の
白色蛍光灯16が傾斜して鎖状の吊り下げ具17によっ
て吊り下げ支持されている。上記蛍光灯16は3波長型
の方が植物の生育に適していることが実験の結果判明し
ている。苗の成長に伴って、前記育成台は図面左方に移
動され、植物が大きくなっても植物の上端と蛍光灯16
との間隔D(図3)がほぼ一定になるように保たれる。
このようにして植物への照度が一定に保たれる。この間
隔を1〜10cmとすると蛍光灯16の熱による葉温上
昇がチップバーンを起こさないようにでき、また照度む
らもなく、きわめて迅速な成長が行われる。図1におけ
る右端の幼苗から左端の成長葉になるまで3〜4週間位
で、ほぼ5日間隔で育成台10を左方に移動させ、収穫
ができる。建物2内の温度はエアコン装置により約17
℃に保たれる。このためエアコン装置19が設けられて
いる(図1)。20は圧縮機、21は凝縮機、22は空
冷ファン、23は冷風通路、24は蒸発器、25は送風
ファンである。At the top of each of the cultivation tanks 1, 1, two white fluorescent lamps 16 are suspended and supported by a chain-like suspending tool 17 which is inclined. Experiments have shown that the three-wavelength fluorescent lamp 16 is more suitable for growing plants. As the seedlings grow, the breeding table is moved to the left in the drawing, and even if the plants grow larger, the upper end of the plants and the fluorescent light 16
Is kept substantially constant.
In this way, the illuminance on the plants is kept constant. When the interval is set to 1 to 10 cm, it is possible to prevent the chip temperature from rising due to the heat of the fluorescent lamp 16 and to achieve extremely rapid growth without uneven illuminance. The breeding table 10 is moved to the left at approximately 5 day intervals from the rightmost seedling to the leftmost growing leaf in FIG. The temperature inside the building 2 is about 17
Kept at ° C. For this purpose, an air conditioner 19 is provided (FIG. 1). Reference numeral 20 denotes a compressor, 21 denotes a condenser, 22 denotes an air cooling fan, 23 denotes a cool air passage, 24 denotes an evaporator, and 25 denotes a blower fan.
【0027】栽培槽1内では、植物の栽培期間中継続的
に、前記培養液中に炭酸ガス濃度の高い空気をポンプ2
6により強制的に吹き込みながら気泡状にして送り込
む。図3の30はこのため従来例で用いられていたエア
ストーンである。この発明においては、図4,図5に示
される如く、栽培槽の培養液中に空気供給チューブ34
が埋設されており、上記炭酸ガス濃度の高い空気が該空
気チューブ34に設けられた小孔から噴き出し、気泡と
なって生じる。空気供給チューブ34の上記噴き出し口
は、植物の根への酸素供給の点からも、また葉の表面へ
の炭酸ガス供給の点や葉の表面への空冷効果の点からも
植物の根の直下近辺に設けられることが有効である。In the cultivation tank 1, air having a high carbon dioxide concentration is continuously pumped into the culture solution during the plant cultivation period.
6. While forcibly blowing, send in the form of bubbles. Reference numeral 30 in FIG. 3 denotes an airstone used in the conventional example. In the present invention, as shown in FIG. 4 and FIG.
Is buried, and the air having a high carbon dioxide concentration is blown out from a small hole provided in the air tube 34 to form air bubbles. The outlet of the air supply tube 34 is located directly below the root of the plant from the point of supply of oxygen to the root of the plant, from the point of supply of carbon dioxide to the surface of the leaf, and from the viewpoint of the air cooling effect to the surface of the leaf. It is effective to be provided in the vicinity.
【0028】各空気吹き込み用チューブ34には、炭酸
ガス発生装置で発生した炭酸ガスがポンプで供給されて
もいいし、別途工場内の一角に炭酸ガス発生用の燃焼装
置を設けて、工場内の環境を前記炭酸ガスの濃度にして
工場内の空気をそのまま供給してもよい。上記炭酸ガス
発生装置は、例えば白金を酸化燃焼触媒としてベンジ
ン、ブタンその他の燃料を燃焼させる接触酸化方式の燃
焼装置を用いることもできる。該装置は燃料を常に一定
状態で燃焼することができ、その燃焼状態により炭酸ガ
スが継続的に安定して発生するものである。工場内の一
角に炭酸ガス発生用の燃焼装置を設けた場合、工場の広
さにもよるが大体植物の消費する炭酸ガスの量と上記燃
焼装置の発生する炭酸ガスの量が同じくらいで環境の炭
酸ガス濃度がほぼ一定になることが確認されている。A carbon dioxide gas generated by a carbon dioxide gas generator may be supplied to each air blowing tube 34 by a pump. The air in the factory may be supplied as it is by setting the environment as the concentration of the carbon dioxide gas. As the carbon dioxide generator, for example, a catalytic oxidation type combustion device that burns benzene, butane, or other fuels using platinum as an oxidation combustion catalyst can be used. The device can always burn fuel in a constant state, and carbon dioxide gas is continuously and stably generated according to the burning state. If a combustion device for generating carbon dioxide is installed in one corner of the factory, the amount of carbon dioxide consumed by the plant and the amount of carbon dioxide generated by the above-mentioned combustion device are almost the same, depending on the size of the plant. It has been confirmed that the concentration of carbon dioxide in the sample is almost constant.
【0029】植物の光合成に炭酸ガスは欠かせず、上記
濃度の高い炭酸ガスは栽培槽の炭酸ガス濃度を約1,000p
pm(好ましくは、1,500 〜2,000ppm)に保つ働きをす
る。なお、栽培槽10の培養液に吹き込む空気の炭酸ガ
ス濃度が500ppm以下では培養液の腐敗防止効果がほとん
ど期待できないし、また5,000ppm以上では炭酸ガス濃度
が高過ぎてpH値が低くなり、培養液に含まれる無機の肥
料成分が析出する場合があるので、 1,000〜5,000ppm程
度が好ましい。また、炭酸ガス濃度の高い空気を培養液
に継続的に吹き込む場合には多孔チューブを使用しない
でノズル、その他の構成を採用してもよい。Carbon dioxide gas is indispensable for photosynthesis of plants.
pm (preferably between 1,500 and 2,000 ppm). If the concentration of carbon dioxide in the air blown into the culture solution in the cultivation tank 10 is less than 500 ppm, the effect of preventing the decay of the culture solution can hardly be expected, and if the concentration is more than 5,000 ppm, the concentration of carbon dioxide is too high and the pH value becomes low. Since the inorganic fertilizer component contained in the liquid may be precipitated, about 1,000 to 5,000 ppm is preferable. When air having a high carbon dioxide concentration is continuously blown into the culture solution, a nozzle or other structure may be employed without using a porous tube.
【0030】この発明の構造は、植物の直下から炭酸ガ
スが気泡の形で供給されるので、従来のように栽培室内
に別途炭酸ガスを満たす方法より、炭酸ガスの吸収効率
が優っている。それと同時に、上記植物の栽培期間中継
続的に前記培養液中に炭酸ガス濃度の高い空気を強制的
に吹き込みながら気泡状にして発生させることにより、
該気泡に含まれる酸素により根への酸素供給も十分なさ
れると共に、上記炭酸ガスが前記培養液を弱酸性にし気
泡の攪拌作用とあいまって、培養液中の微生物や微細な
有機物の腐敗が防止される効果がある。In the structure of the present invention, the carbon dioxide gas is supplied in the form of bubbles from directly below the plant, so that the carbon dioxide gas absorption efficiency is superior to the conventional method of separately filling the cultivation chamber with the carbon dioxide gas. At the same time, by continuously blowing air having a high carbon dioxide concentration into the culture solution during the cultivation period of the plant to generate bubbles while forcibly blowing the air,
Oxygen contained in the bubbles also provides sufficient oxygen supply to the roots, and the carbon dioxide gas makes the culture solution weakly acidic, and in combination with the stirring action of the bubbles, prevents decay of microorganisms and fine organic matter in the culture solution. Has the effect of being done.
【0031】さらに、上記気泡は植物の葉の裏から上昇
するので、葉の表面を空冷する効果があり、葉の人工光
源による温度上昇による熱障害(チップバーン)を防止
する効果もある。Furthermore, since the bubbles rise from behind the leaves of the plant, they have the effect of cooling the surface of the leaves, and also have the effect of preventing thermal damage (chip burn) due to temperature rise by artificial light sources on the leaves.
【0032】以上の栽培装置を用い、植物としてはレタ
スおよびサラダ菜を用いて栽培実験を行った。苗として
は本葉3〜4枚になったものを用い、育成台に2枚のの
苗を30cm離し、それぞれの孔2に挿入して支持した。
植物11の上端と蛍光灯16の間隔Dを1〜10cmと
し、植物の成長にともなって、5日に1度の割合で植物
育成板を横方向(矢印)に動かし、上記間隔をたもって
3週間育成した。また、培養液の循環ポンプ3は連続運
転し、各段の水位は植物の根元まで浸るようにほぼ一定
に保った。培養液は市販の水耕用肥料を用い、建物2内
の温度は17℃、炭酸ガス濃度は1,000ppm以上、照度は
6,000 ルックス以上とした。その結果、1枚の重さはサ
ラダ菜で250gづつ5日に1回収穫でき、品質はいず
れも良好であった。Cultivation experiments were performed using the above cultivation apparatus and lettuce and salad vegetables as plants. Three to four true leaves were used as seedlings, and two seedlings were separated by 30 cm on a breeding stand and inserted into each hole 2 and supported.
The distance D between the upper end of the plant 11 and the fluorescent lamp 16 is set to 1 to 10 cm. As the plant grows, the plant growing board is moved in the horizontal direction (arrow) once every five days, and the distance is set to 3 cm. Nurtured for a week. Further, the circulation pump 3 for the culture solution was operated continuously, and the water level in each stage was kept substantially constant so that it was immersed to the root of the plant. The culture solution uses a commercially available hydroponic fertilizer, the temperature in the building 2 is 17 ° C, the carbon dioxide concentration is 1,000 ppm or more, and the illuminance is
More than 6,000 looks. As a result, each sheet was weighed at 250 g per salad and harvested once every five days, and the quality was good.
【0033】なお、栽培する植物はレタス、サラダ菜に
限られず、他の根菜類や観賞用の植物、あるいはトマト
やハーブといったもの、さらには米でも可能である。The plants to be cultivated are not limited to lettuce and salad vegetables, but may be other root vegetables, ornamental plants, tomatoes and herbs, or even rice.
【0034】[0034]
【発明の効果】以上の栽培装置を用い、植物としてはレ
タスおよびサラダ菜を用いて栽培したら、根の発育が従
来の水耕栽培より活発で、葉の成長も十分行われ、しか
もチップバーンが生じないで、無農薬でかつおいしいレ
タス等を収穫することができた。しかも、栽培槽の内面
を全面反射層で覆い多重反射を最大限利用することによ
り、60wの蛍光灯2本という従来の水耕栽培では考え
られない極めて少ない光量で生育でき、また植物の上端
と蛍光灯の間隔を1〜10cmという非常に近接した状
態で用いて葉の表面への光量を増やしても、人工光源
(蛍光灯)による熱障害(チップバーン)をおこすこと
なく、路地栽培のものより柔らかい葉の野菜を栽培でき
た。When the above cultivation apparatus is used and plants are cultivated using lettuce and salad vegetables, roots are more active than conventional hydroponic cultivation, leaf growth is sufficiently performed, and chip burn occurs. Without it, it was possible to harvest pesticide-free and delicious lettuce. Moreover, by covering the inner surface of the cultivation tank with a reflective layer on the entire surface and maximizing the use of multiple reflections, the cultivation tank can be grown with an extremely small amount of light that cannot be considered by conventional hydroponic cultivation, such as two fluorescent lamps of 60 watts. Even if the distance between the fluorescent lamps is very close to 1 to 10 cm and the amount of light to the leaf surface is increased, it does not cause thermal damage (chip burn) due to artificial light sources (fluorescent lamps) and is used for alley cultivation We could grow softer leafy vegetables.
【0035】また、栽培室の多重反射や植物への近接照
射を可能としたため人工光源の光量を最大限に活用する
ことにより、水耕栽培のコストの半分以上を占める電力
消費を従来の方法に比較し半分以下にすることができ
た。このコスト低減により、従来の露地物との価格競争
力ができ、しかも無農薬で露地物より柔らかくておいし
い野菜を栽培することができた。さらに、露地物と違っ
て季節や環境に関係なく年中収穫できるので、例えば冬
の北欧のように寒くて日照の殆どない環境や夏の砂漠の
真ん中でも、毎日新鮮な野菜が入手できることになるの
で植物工場として非常に優れた方法である。In addition, since multiple reflections in the cultivation room and close-up irradiation to plants are made possible, by maximizing the amount of light from the artificial light source, power consumption, which accounts for more than half of the cost of hydroponics, can be reduced by the conventional method. Compared to less than half. Due to this cost reduction, the price competitiveness with the conventional open-field material was able to be obtained, and the vegetables that were softer and more delicious than the open-air material without pesticides could be grown. In addition, unlike the open-air products, they can be harvested year-round regardless of the season or environment, so that fresh vegetables can be obtained every day, for example, in a cold and almost sunless environment such as winter in Northern Europe or in the middle of a summer desert. It is a very good method as a plant factory.
【図1】この発明に用いられる栽培槽装置の全体図を示
すものである。FIG. 1 shows an overall view of a cultivation tank device used in the present invention.
【図2】この発明に用いられる栽培槽装置の部分構造図
を示すものである。FIG. 2 is a partial structural view of a cultivation tank device used in the present invention.
【図3】この発明の従来例の場合の、上記栽培槽装置に
おける部分詳細図を示すものである。FIG. 3 is a partial detailed view of the cultivation tank device in the case of the conventional example of the present invention.
【図4】この発明に用いられる栽培槽装置の部分詳細図
を示すものである。FIG. 4 is a partial detailed view of a cultivation tank device used in the present invention.
【図5】この発明に用いられる栽培槽装置の横断面図を
示すものである。FIG. 5 is a cross-sectional view of a cultivation tank device used in the present invention.
【図6】この発明の栽培槽装置に用いられる育成台の斜
視図を示すものである。FIG. 6 is a perspective view of a growing table used in the cultivation tank device of the present invention.
1 栽培槽 2 建物 3 ポンプ 4 サイホン 5 パイプ 8 支持片 10 育成台 11 苗 12 穴 13 反射部材 14 光進入防止板 15 ウレタン等 16 蛍光灯 19 エアコン装置 26 エアポンプ 28 炭酸ガスボンベ 34 空気供給チューブ 51 水位調節用の管 52 液面 53 気泡 54 水耕液 DESCRIPTION OF SYMBOLS 1 Cultivation tank 2 Building 3 Pump 4 Siphon 5 Pipe 8 Supporting piece 10 Growing stand 11 Seedling 12 Hole 13 Reflecting member 14 Light entry prevention plate 15 Urethane etc. 16 Fluorescent lamp 19 Air conditioner 26 Air pump 28 Carbon dioxide gas cylinder 34 Air supply tube 51 Water level adjustment Pipe 52 Liquid level 53 Bubbles 54 Hydroponic liquid
Claims (6)
浸し、植物の栽培期間中継続的に上記培養液中に空気を
吹き込みながら植物を生育する人工光源を用いた植物栽
培方法において、 植物の根を常時根元まで十分に上記培養液に浸したこと
を特徴とする植物栽培方法。1. A plant cultivation method using an artificial light source for immersing roots of a plant in a culture solution containing a fertilizer component and continuously growing the plant while blowing air into the culture solution during the plant cultivation period, A plant cultivation method, wherein a plant root is always sufficiently immersed in the culture solution up to the root.
ことにより、栽培植物の直下近辺から気泡を発生させる
ことを特徴とする前記請求項1記載の植物栽培方法。2. The plant cultivation method according to claim 1, wherein air bubbles are generated from immediately below the cultivated plant by forcibly blowing air into the culture solution.
好ましくは 1,000〜5,000ppmであることを特徴とする前
記請求項1または2記載の植物栽培方法。3. The air has a carbon dioxide concentration of 500 ppm or more,
The plant cultivation method according to claim 1 or 2, wherein the concentration is preferably 1,000 to 5,000 ppm.
育成室内の全ての内面を反射層で覆って最小限の光量で
植物を育成したことを特徴とする前記請求項1〜3の内
いずれか1項記載の植物栽培方法。4. The plant according to claim 1, wherein a fluorescent lamp is used as the artificial light source, and all inner surfaces in the plant growing room are covered with a reflective layer to grow the plant with a minimum amount of light. 2. The method for cultivating a plant according to claim 1.
る前記請求項1〜4のうち、いずれか1項記載の植物栽
培方法。5. The method according to claim 1, wherein the plant is a root vegetable.
元まで浸し、植物の栽培期間中継続的に上記培養液中に
空気を強制的に吹き込みながら植物を生育する人工光源
を用いた植物栽培装置において、 上記栽培中、植物を支持する植物育成板を十分遮光性を
有する構造とし、前記人工光源の光が前記培養液に到達
しないようにしたことを特徴とする植物栽培装置。6. An artificial light source for growing a plant while immersing the root of the plant in a culture solution containing a fertilizer component up to the root and continuously blowing air into the culture solution continuously during the cultivation of the plant. In the plant cultivation apparatus, the plant cultivation plate supporting the plant has a sufficiently light-shielding structure during the cultivation, so that light of the artificial light source does not reach the culture solution.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9171180A JPH1166A (en) | 1997-06-13 | 1997-06-13 | Plant culturing method and apparatus therefor |
PCT/JP1998/002510 WO1998056236A1 (en) | 1997-06-13 | 1998-06-05 | Plant cultivation method and apparatus |
US09/242,172 US6105309A (en) | 1997-06-13 | 1998-06-05 | Plant cultivation method and apparatus |
EP98923153A EP0937385A1 (en) | 1997-06-13 | 1998-06-05 | Plant cultivation method and apparatus |
CA002261815A CA2261815C (en) | 1997-06-13 | 1998-06-05 | Method for growing plants and apparatus for growing plants |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9171180A JPH1166A (en) | 1997-06-13 | 1997-06-13 | Plant culturing method and apparatus therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH1166A true JPH1166A (en) | 1999-01-06 |
Family
ID=15918494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9171180A Pending JPH1166A (en) | 1997-06-13 | 1997-06-13 | Plant culturing method and apparatus therefor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH1166A (en) |
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JP2010063414A (en) * | 2008-09-11 | 2010-03-25 | Osaka Prefecture Univ | Hydroponic cultivation method for garlic |
JP2010115158A (en) * | 2008-11-13 | 2010-05-27 | Univ Of Tsukuba | Plant cultivation device, and method for producing objective protein in genetically altered tomato |
JP2012016297A (en) * | 2010-07-06 | 2012-01-26 | Kochi Univ | Method of growing plant |
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US10172294B2 (en) | 2013-02-04 | 2019-01-08 | Showa Denko K.K. | Method for cultivating plant |
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