JP2004194606A

JP2004194606A - Method for culturing mandarin orange in greenhouse

Info

Publication number: JP2004194606A
Application number: JP2002369397A
Authority: JP
Inventors: Akio Sugiura; 章夫杉浦
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-20
Filing date: 2002-12-20
Publication date: 2004-07-15
Anticipated expiration: 2022-12-20
Also published as: JP4001205B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for culturing mandarin orange in a greenhouse, enabling harvest in an extremely early period. <P>SOLUTION: This method for culturing the mandarin orange in the greenhouse comprises utilizing a greenhouse equipped with a ground cooling facility for cooling the ground around the root part of a mandarin orange tree to an arbitrary temperature, an air temperature controlling facility for controlling internal air temperature having a ventilation apparatus, a sprinkling apparatus and a heater and a watering facility for watering to the soil. In the culturing method, the ground cooling facility is operated after harvest or during harvest in spring season and the ground temperature around the root part of the mandarin orange tree is kept to 10-14°C for 120-150 day (in the step 101) and the ground cooling facility is stopped (in the step 102) and the watering facility is operated and when outside temperature at night becomes 22°C, the air temperature control facility is operated and internal temperatures at night and afternoon are kept to a prescribed temperature (in the step 102), and the orange is germinated, budded, bloomed, fructified, matured and harvested in spring (in the step 104). <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明が属する技術分野】
本発明は、極早期に収穫・出荷する極早生みかん及び早生温州みかんを栽培するためのハウスみかんの栽培方法に係り、特に、ハウス内の地温および気温を制御して、前年の加温時期に出芽した予備枝及び果梗枝を翌年の結果母枝として利用することによって、収穫期を早めて希少価値を付加しうるハウスみかんの栽培方法に関するものである。
【０００２】
【従来の技術】
従来、極早生みかん及び早生温州みかんを極早期に収穫・出荷するハウスみかんの栽培方法は、換気装置、散水装置、加温装置を備え、その内部気温を制御するための気温制御設備と、土壌に潅水をするための潅水設備と、を設けたハウスを使用するものであり、６月上旬に収穫・出荷した後に、みかん樹に剪定、施肥、潅水を行っていた。この剪定は、果梗枝を残し、前年の加温時に発芽した予備枝を切り落とすか、もしくは予備枝の先を１／３ほど切り落として、花が付かないようにして発芽させ、結果母枝となすというものである。そして、前記剪定後の前記果梗枝に夏芽が付き、これが成長して結果母枝となり、続く暑い時期に生殖成長する。続いて、秋冷を経て１０月中旬〜１１月上旬に、ハウス内の気温制御設備の加温装置を作動させてハウス内温度が昼間３０度Ｃ以下、夜間２４度Ｃ程度となるように加温を開始し、この結果、発芽、出蕾、開花、結実し、６月上旬〜中旬に成熟して収穫、出荷する、というものである（非特許文献１）。
【０００３】
【非特許文献１】
白石雅也著「ミカンのハウス栽培」社団法人農村漁村文化協会発行１９９０年５月２０日第４印刷発行第１８〜第２０ページの記載および第１８〜第１９ページ第２図。
【０００４】
【発明が解決しようとする課題】
上記従来の極早期栽培方法は、具体的には図３（栽培工程図）に示すように、収穫後にみかん樹に剪定を行い（ステップ２０１）、その後ここに付いた夏芽が成長した結果母枝から新たに発芽させるもので、花芽を作るのに時間がかかり、早期に加温装置を作動させて前記発芽スタートすることができず、例えば、前記加温装置の作動は１１月中旬（ステップ２０２）になってしまい、結果的に収穫（ステップ２０３）の時期も遅くなるという問題があった。そして、夏場の暑い時期に作業を行わなければならないので、労働条件がわるいという問題もあった。なお、収穫後に前記剪定を行うと、その後の発芽とともに花が付くが、この花からみかんを栽培すると、その年の１２月〜翌年の１月ごろに出荷をするもの、すなわち路地ものと同じになって収益率が低くなってしまう。
【０００５】
本発明は上記問題を解消することを課題とし、該課題を解決したハウスみかんの栽培方法を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記目的を達成するために、請求項１に記載の本発明は、みかん樹根部周囲の地中を任意温度に冷却するための地中冷却設備と、換気装置、散水装置及び加温装置を備え、内部気温を制御するための気温制御設備と、土壌に潅水をするための潅水設備とを備えたハウスを利用するハウスみかんの栽培方法であって、春における収穫後あるいは収穫最中から、前記地中冷却設備を作動させて、みかん樹根部周囲の地温を１０度Ｃ〜１４度Ｃに１２０日〜１５０日間維持した後に、前記地中冷却設備を停止するとともに、潅水設備を作動させ、その後、夜間の外気温が２２度Ｃ以下になった時期に気温制御設備を作動させて、夜間の内部温度を１７度Ｃ〜２５度Ｃに、また昼間の内部温度を２５度Ｃ〜３０度Ｃに維持することによって、発芽、出蕾、開花、結実、成熟させて、春の収穫に至ることを特徴とするものである。
【０００７】
また、請求項２に記載の本発明は、請求項１に記載の発明の構成に加えて、地温制御設備を作動させる際に、ハウス内の地面に遮光・保冷用シートを設置することを特徴とするものである。
【０００８】
さらに、請求項３に記載の本発明は、請求項１又は請求項２に記載の発明の構成に加えて、地温制御設備を停止した後の、外気温が２２度Ｃより高い期間、ベンジルアミノプリン液剤をハウス内のみかん樹に散布することを特徴とするものである。
【０００９】
【発明の実施の形態】
以下に、本発明を極早生温州みかんの栽培に適用した好適な実施形態を図１及び図２に基づいて詳細に説明する。ここにおいて、図１はハウスの概略図、図２は栽培工程フロー図である。
【００１０】
図１に示すように、極早生温州みかん栽培用のハウス１は、地温検知器（図示せず）からの地温情報をもとにオンオフして地温を制御するようになした地中冷却設備２と、換気装置（図示せず）、散水装置３及び加温装置４を備え、内部気温を制御するための気温制御設備５と、土壌に水を供給するための潅水設備６とを備えてなる。
【００１１】
図１に示すように、地中冷却設備２は、ハウス１内の地中に、深さ約１５〜２０ｃｍ、間隔２０〜２５ｃｍで、冷却水を流通するための通水パイプ７ａを埋設する。この通水パイプ７ａは、前記冷却水を冷却するためのチラー７ｂと、前記冷却水を循環させるための駆動モータ７ｃとに連結してある。また、前記地中冷却設備２を作動させた際は、ハウス１内の地面に遮光・保冷用シート（図示せず）を敷設して、地中冷却作用を補助する。また、前記チラー７ｂは、温度設定機能を有し、冷却水の温度を任意に設定可能である。
【００１２】
上記気温制御設備５の換気装置（図示せず）は、天井部分を巻き取って開放するように構成し、また、散水装置３は、天井の内側に配置したスプリンクラー３ａに連繋し、これによってみかん樹ａに散水し気化熱を奪うことでみかん樹自体を冷房するものである。
【００１３】
次に上記ハウス１を用いてみかん栽培を行うための栽培工程を図２によって詳細に説明する。
【００１４】
（栽培工程１）
春（３月中旬〜５月上旬）に行われる収穫の後、あるいは収穫の最中から、地中冷却設備２を作動させ（ステップ１０１）て、ハウス１内の地温を１０度Ｃ〜１４度Ｃとなし、これを１２０日〜１５０日間維持する。
【００１５】
前記収穫後は、みかん樹に余分な栄養を消費させないために施肥や潅水を行わない。また、上記期間のうち梅雨あけまでは、雨水をいれないために天井を開放しない。
【００１６】
（栽培工程２）
ハウス１内の前記地温（１０度Ｃ〜１４度Ｃ）を１２０日〜１５０日間維持した後は、前記地中冷却設備２を停止し、ただちに潅水設備６を作動させて地面に給水する（ステップ１０２）。また、必要であれば施肥も行う。
【００１７】
前記地温を１２０日〜１５０日間維持するのは、前年の予備枝（結果母枝）及び果梗枝（前記収穫した枝）の、暑い時期の発芽、出蕾を抑えておくためである。そして、この冷却期間には、花芽の分化が盛んに起こり、後述する加温後に多くの花がつくことになる。なお、前記地温は、好適には１０度Ｃ〜１４度Ｃであるが、最適には約１３度Ｃであり、１０度Ｃより低くすると、みかん樹根部に悪影響を与え、また、１４度Ｃを越えると、発芽、出蕾してしまう。さらに、地温を前記約１３度Ｃとするにはチラーで冷却する冷却水の水温を約６度Ｃにすればよい。
【００１８】
（栽培工程３）
前記水補給を行った後は、ベンジルアミノプリン液剤（以下ＢＡ剤という）を散布し、夜間の外気温が２２度Ｃ以下になった時期に、気温制御設備５の加温装置４や散水装置３を適宜作動させて、夜間のハウス内気温を１７度Ｃ〜２５度Ｃ、昼間のハウス内気温を２５度Ｃ〜３０度Ｃとする（ステップ１０３）。また必要ならば、このＢＡ剤の散布前後に窒素分の多い葉面散布剤を散布する。
【００１９】
上記のように加温装置４を用いたハウス１内気温制御を開始すると、これまで地温を下げることによって、発芽、出蕾が抑えられていた結果母枝（前年の予備枝及び果梗枝）が一斉に発芽、出蕾する。また、この加温装置４は、地中冷却設備２による地中冷却と潅水設備６による給水とを終えた後に直ちに作動させてもよいが、外気温がまだ高い時期（８月下旬〜９月上旬）なので、上記のＢＡ剤の散布を行えば、加温と同等の効果があるうえ、前記一斉の発芽、出蕾を促し、かつ、地中冷却と給水の終了後の前記発芽、出蕾を１週間程度早めることが可能である。なお、この加温装置４は、夜間や昼間の気温が下がり過ぎないようにするために使用するもので、前述の地中冷却設備２を駆動しているときに使用することはない。また、前記ハウス内気温は、上記の夜間１７度Ｃ〜２５度Ｃ、昼間２５度Ｃ〜３０度Ｃの範囲から外れると、みかん樹の生理的成長が狂いみかんの成熟に悪影響を与える。さらに、加温前の地中冷却期間においては、新芽が少ないので発根もなく、地中からの養分の吸収が悪い状態であるため、みかんの味はよいが、収穫量は減少する。そのため、前述のように、葉面散布剤を散布して、新葉を増加させ養分の吸収を高める。
【００２０】
（栽培工程４）
前記ステップ１０３の後（気温制御開始後）に、ハウス１内の前記気温（夜間１７度Ｃ〜２５度Ｃ、昼間２５度Ｃ〜３０度Ｃ）を２００日間前後維持すると、この期間に、前年の予備枝及び果梗枝から成長した結果母枝が一斉に発芽し、萌芽、出蕾、開花、結実し、翌年の３月下旬にみかんとして成熟する。そして、前記成熟後は適宜収穫、出荷する（ステップ１０４）。
【００２１】
【表１】

【００２２】
表１は、気温制御設備５を適宜作動させ、加温後のハウス１内設定気温の実施例を示すもので、１〜７日は萌芽期、８〜３０日は発芽及び出蕾、３１〜６０日は結実期、６１〜１３１日は肥大期、１５１〜１８０日は肥大期及び着色（みかん色）初期、１８１〜２００日は着色完了及び成熟期である。そして、上記温度制御開始後は、昼間の温度は３０度Ｃを越えないように、天井の開放あるいはスプリンクラー７ｂからの散水で気化熱を奪うことにより気温を下げたり、夜間に１７度Ｃを下回らないように加温装置４を作動させて制御する。
【００２３】
なお、本発明は、上記実施形態に限定されるものではなく、例えば、適用するみかんは温州みかんとは異なるみかんであってもよい。
【００２４】
【発明の効果】
以上説明したように、請求項１に記載の本発明によれば、ハウス内みかん樹の、主に前年の予備枝に対して、収穫後あるいは収穫の最中に、剪定を行うことなく、地温冷却設備を作動して地温を１０度Ｃ〜１４度Ｃに冷却し、この冷却期間に、花芽の分化を盛んに起こさせ、加温後に多くの花がつくようになすとともに、一斉に発芽、出蕾させ、開花、結実、成熟させうるので、希少価値を有し高値で販売可能なみかんの極早期の収穫が可能であるうえ、出荷時期が早いため、害虫（例えば、スリップス）の被害を受けにくいほか、暑い時期の作業が少なく、労力配分が容易であり、また、遅い時期に収穫する従来のみかんよりも浮皮も少なく高品質のみかんを得られるという効果を奏する。
【００２５】
また、請求項２に記載の本発明は、請求項１に記載の発明の効果に加えて、遮光・保冷用シートの設置によって、地面への直射日光を遮り、かつ、地面からの冷気の放射を防止するので、地中冷却設備の燃料消費を低減することができるという効果を奏する。
【００２６】
さらに、請求項３に記載の本発明は、地中冷却設備を停止した後の、外気温が２２度Ｃより高い期間、ベンジルアミノプリン液剤をみかん樹に散布することによって、直ちに加温装置を作動させる必要がなく、該加温装置の電気消費を低減することができるという効果を奏する。
【図面の簡単な説明】
【図１】ハウスの概略図。
【図２】栽培工程フロー図。
【図３】従来例の栽培工程フロー図。
【符号の説明】
ａみかん樹
１ハウス
２地中冷却設備
３散水装置
４加温装置
５気温制御設備
６潅水設備
７ａ通水パイプ
７ｂチラー
７ｃ駆動モータ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cultivation method of house oranges for cultivating very early oranges and early green Mandarin oranges harvested and shipped at an extremely early stage, in particular, by controlling the soil temperature and temperature in the house, The present invention relates to a method of cultivating house oranges that can add a scarce value by shortening the harvest time by using the emerged spare branches and spruce branches as mother branches as a result of the following year.
[0002]
[Prior art]
Conventionally, the cultivation method of green mandarin oranges for harvesting and shipping very early mandarin oranges and early citrus oranges is provided with a ventilation device, a watering device, a heating device, a temperature control device for controlling the internal temperature, and a soil. It uses a house equipped with an irrigation facility for irrigation. After harvesting and shipping in early June, pruning, fertilizing, and watering the tangerine trees. This pruning is to cut off the spare branch that germinated at the time of heating in the previous year, or to cut off the tip of the spare branch by about 1/3, so that the flower does not stick, and germinate. It is something to do. Then, the buds after the pruning have summer buds, which grow to become mother branches, and reproductively grow in the subsequent hot season. Subsequently, after the autumn cooling, from mid-October to early November, the heating device of the temperature control equipment in the house is operated so that the temperature in the house becomes 30 ° C or less during the day and about 24 ° C at night. Is started, and as a result, germination, buds, flowering, fruiting, and maturity are harvested and shipped in early to middle June (Non-Patent Document 1).
[0003]
[Non-patent document 1]
Masaya Shiraishi "House cultivation of oranges" Published by The Association of Rural Fishing Villages May 20, 1990 Issued 4th print on pages 18-20 and FIG. 2 on pages 18-19.
[0004]
[Problems to be solved by the invention]
In the above-mentioned conventional very early cultivation method, specifically, as shown in FIG. 3 (cultivation process diagram), the tangerine tree is pruned after harvesting (step 201), and the summer buds attached thereto grow as a result. The sprout is newly sprouted from the branch, it takes time to produce flower buds, and the germination cannot be started by activating the heating device early. For example, the operation of the heating device is in the middle of November (step 202), resulting in a problem that the harvest (step 203) is also delayed. In addition, there is a problem that working conditions are poor because work must be performed during the hot summer months. In addition, when the said pruning is performed after harvesting, a flower is attached with subsequent germination, but when tangerines are cultivated from this flower, those shipped from December of the year to about January of the following year, that is, the same as those of the alley. And the profitability is low.
[0005]
An object of the present invention is to solve the above problems, and an object of the present invention is to provide a method for cultivating house oranges that has solved the problems.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention according to claim 1 includes an underground cooling facility for cooling the underground around the tangerine tree root to an arbitrary temperature, a ventilation device, a watering device, and a heating device. A method of cultivating house oranges using a house equipped with a temperature control device for controlling the internal temperature and a watering device for watering the soil, after or during the harvest in the spring, Activate the underground cooling facility, and after maintaining the ground temperature around the tangerine tree root at 10 ° C. to 14 ° C. for 120 days to 150 days, stop the underground cooling facility and activate the irrigation facility, When the outside air temperature at night falls below 22 ° C., the temperature control equipment is operated to set the internal temperature at night to 17 ° C. to 25 ° C. and the internal temperature at day time to 25 ° C. to 30 ° C. Germination, emergence by maintaining , Flowering, fruiting and matured, is characterized in that leading to harvest spring.
[0007]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, a light-shielding / cooling sheet is installed on the ground in the house when the ground temperature control equipment is operated. It is assumed that.
[0008]
Furthermore, the present invention according to claim 3 provides the invention according to claim 1 or 2, in addition to the configuration according to claim 1 or claim 2, wherein the benzylamino is used for a period in which the outside air temperature is higher than 22 ° C. after stopping the ground temperature control equipment. It is characterized in that a pudding solution is sprayed on a tangerine tree in a house.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment in which the present invention is applied to the cultivation of Satsuma mandarin oranges will be described in detail with reference to FIGS. Here, FIG. 1 is a schematic diagram of a house, and FIG. 2 is a flowchart of a cultivation process.
[0010]
As shown in FIG. 1, an underground cooling facility 2 for controlling the soil temperature by turning on and off the ground 1 based on soil temperature information from a soil temperature detector (not shown) is used for a house 1 for cultivating extremely early Satsuma mandarin oranges. And a ventilation device (not shown), a watering device 3 and a heating device 4, a temperature control device 5 for controlling the internal temperature, and an irrigation device 6 for supplying water to the soil. .
[0011]
As shown in FIG. 1, the underground cooling facility 2 embeds a water passage pipe 7a for flowing cooling water at a depth of about 15 to 20 cm and an interval of 20 to 25 cm in the ground in the house 1. The water pipe 7a is connected to a chiller 7b for cooling the cooling water and a drive motor 7c for circulating the cooling water. When the underground cooling facility 2 is operated, a sheet for shielding and cooling (not shown) is laid on the ground in the house 1 to assist the underground cooling function. Further, the chiller 7b has a temperature setting function, and can arbitrarily set the temperature of the cooling water.
[0012]
The ventilation device (not shown) of the temperature control equipment 5 is configured to wind up and open the ceiling portion, and the sprinkler device 3 is connected to a sprinkler 3a disposed inside the ceiling, whereby oranges are provided. The mandarin orange tree itself is cooled by sprinkling water on the tree a and removing heat of vaporization.
[0013]
Next, the cultivation process for citrus cultivation using the house 1 will be described in detail with reference to FIG.
[0014]
(Cultivation process 1)
After or during the harvest (from the middle of March to the beginning of May) in the spring (from the middle of the harvest), the underground cooling system 2 is operated (step 101), and the soil temperature in the house 1 is set to 10 ° C. to 14 ° C. C and maintain it for 120-150 days.
[0015]
After the harvest, no fertilization or irrigation is performed to prevent the tangerine tree from consuming extra nutrients. Also, during the above period, the ceiling will not be opened until the rainy season starts because rainwater will not be poured.
[0016]
(Cultivation process 2)
After maintaining the ground temperature (10 ° C. to 14 ° C.) in the house 1 for 120 days to 150 days, the underground cooling facility 2 is stopped, and the irrigation facility 6 is immediately activated to supply water to the ground (step). 102). Fertilization is also performed if necessary.
[0017]
The reason why the soil temperature is maintained for 120 days to 150 days is to suppress germination and bud buds of the preliminary branch (resulting mother branch) and the stalk of the previous year (the harvested branch) in the hot season. During the cooling period, flower buds are actively differentiated, and many flowers are formed after heating, which will be described later. The soil temperature is preferably 10 ° C. to 14 ° C., but is optimally about 13 ° C. If the temperature is lower than 10 ° C., the root of the tangerine tree is adversely affected. If it goes over, it will germinate and bud. Furthermore, the temperature of the cooling water to be cooled by the chiller may be set to about 6 ° C. to set the ground temperature to about 13 ° C.
[0018]
(Cultivation process 3)
After the water replenishment is performed, a benzylaminopurine solution (hereinafter referred to as a BA agent) is sprayed, and when the outside temperature at night falls to 22 ° C. or less, the heating device 4 or the water spray device of the temperature control equipment 5 is used. 3 is appropriately operated to set the nighttime house temperature to 17 ° C. to 25 ° C. and the daytime house temperature to 25 ° C. to 30 ° C. (step 103). If necessary, a foliar spray containing a large amount of nitrogen is sprayed before and after spraying the BA agent.
[0019]
When the temperature control in the house 1 using the heating device 4 is started as described above, germination and bud buds are suppressed by lowering the ground temperature. Germinate and germinate simultaneously. The heating device 4 may be operated immediately after the underground cooling by the underground cooling facility 2 and the water supply by the irrigation facility 6 are finished, but it is possible to operate the heating apparatus 4 at a time when the outside air temperature is still high (late August to September). Therefore, if the above BA agent is sprayed, it has the same effect as heating, promotes simultaneous germination and bud buds, and germinates and buds after the completion of underground cooling and water supply. Can be advanced by about one week. Note that the heating device 4 is used to prevent the temperature during the night or day from dropping too much, and is not used when the underground cooling facility 2 is driven. In addition, when the temperature in the house is out of the range of 17 ° C. to 25 ° C. at night and 25 ° C. to 30 ° C. at daytime, the physiological growth of tangerine trees is disturbed and the maturation of tangerines is adversely affected. Furthermore, in the underground cooling period before heating, there are few shoots and there is no rooting, and the nutrients are poorly absorbed from the ground, so that the oranges taste good but the yield is reduced. Therefore, as described above, a foliar spray is sprayed to increase new leaves and increase nutrient absorption.
[0020]
(Cultivation process 4)
After the step 103 (after the start of the temperature control), if the temperature in the house 1 (17 ° C. to 25 ° C. at night, 25 ° C. to 30 ° C. at daytime) is maintained for about 200 days, the period becomes As a result of growing from the spare branch and stalk, the mother branch germinates all at once, germinates, emerges, blossoms, and bears fruit, and matures as oranges in late March of the following year. Then, after the maturation, they are harvested and shipped as appropriate (step 104).
[0021]
[Table 1]

[0022]
Table 1 shows an example of the set temperature inside the house 1 after the temperature control equipment 5 is appropriately operated and heated, and the germination period is from 1 to 7 days, the germination and buds are from 8 to 30 days, and 31 to 31 days. The 60th day is the fruiting period, the 61st to 131th day is the hypertrophic period, the 151st to 180th day is the hypertrophic period and early coloring (orange), and the 181 to 200th day is the coloring complete and mature period. After the start of the temperature control, the temperature is lowered by opening the ceiling or depriving the heat of vaporization by sprinkling water from the sprinkler 7b so that the temperature in the day does not exceed 30 ° C. The heating device 4 is operated and controlled so as not to cause the problem.
[0023]
In addition, this invention is not limited to the said embodiment, For example, the tangerine to apply may be a tangerine different from Unshu mandarin orange.
[0024]
【The invention's effect】
As described above, according to the present invention as set forth in claim 1, the temperature of the tangerine tree in the house is maintained without pruning, mainly after harvesting or during the harvest, with respect to the spare branches of the previous year. By operating the cooling equipment to cool the ground temperature to 10 degrees C to 14 degrees C, during this cooling period, the flower buds are actively differentiated, many flowers are formed after heating, and germination occurs all at once. It can be budded, flowered, fruited, and matured, so it is possible to harvest rare and valuable high-priced mandarin oranges at an early stage, and because of the early shipping time, damage of pests (eg, thrips) In addition to being difficult to receive, it has the effect of less work in hot seasons, easy distribution of labor, and the ability to obtain high-quality oranges with less peeling than conventional oranges harvested late.
[0025]
According to a second aspect of the present invention, in addition to the effects of the first aspect, the provision of a light-shielding / cooling sheet blocks direct sunlight on the ground and radiates cool air from the ground. Therefore, it is possible to reduce the fuel consumption of the underground cooling facility.
[0026]
Further, the present invention according to claim 3 is that, after the underground cooling equipment is stopped, the benzylaminopurine solution is sprayed on the tangerine tree during a period in which the outside air temperature is higher than 22 ° C., so that the heating device is immediately activated. There is no need to operate, and the effect is obtained that the electricity consumption of the heating device can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a house.
FIG. 2 is a flowchart of a cultivation process.
FIG. 3 is a flowchart of a conventional cultivation process.
[Explanation of symbols]
a Tangerine tree 1 House 2 Underground cooling facility 3 Sprinkler 4 Heating device 5 Temperature control facility 6 Irrigation facility 7a Water pipe 7b Chiller 7c Drive motor

Claims

Underground cooling equipment for cooling the ground around the root of the tangerine tree to an arbitrary temperature, equipped with a ventilator, water sprinkler and heating device, temperature control equipment for controlling the internal air temperature, and watering the soil For cultivating house mandarin oranges using a house provided with an irrigation facility for cultivation, wherein after or during the harvest in the spring, the underground cooling system is operated to lower the soil temperature around the roots of the tangerine tree to 10 degrees. After maintaining at C to 14 ° C for 120 to 150 days, the underground cooling facility is stopped and the watering facility is operated, and then, at a time when the outside air temperature at night becomes 22 ° C or lower, a temperature control facility is provided. Germination, budding, flowering, fruiting, and maturation by maintaining the nighttime internal temperature between 17 ° C and 25 ° C and the daytime internal temperature between 25 ° C and 30 ° C. Characterized by the spring harvest Cultivation method of house oranges to be.

The method for cultivating house oranges according to claim 1, wherein a sheet for shading and cooling is installed on the ground in the house when operating the underground cooling facility.

The cultivation method of house oranges according to claim 1 or 2, wherein the benzylaminopurine solution is sprayed on the tangerine tree during a period in which the outside air temperature is higher than 22 ° C after the underground cooling facility is stopped. .