JP6374637B2 - Efficient production method for Japanese cedar cuttings - Google Patents
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Description
本発明は、スギの挿し木苗（以下「スギ挿し木苗」ということがある）を効率的に製造（生産）する方法に関する。 The present invention relates to a method for efficiently producing (producing) a cedar cutting seedling (hereinafter sometimes referred to as a “cedar cutting seedling”).
戦後造林地が主伐期を迎え、林業用種苗生産体制の整備が急務となっているところ、スギも例外ではない。スギの苗生産は、主に実生で行われるが、九州地方では、挿し木による育苗が行われている。九州の挿し木育苗は、一般的に露地において緑枝挿しによって行われている。
九州地方における挿し木の時期は主に新芽が米粒大程度の大きさになる３月中旬〜４月中旬に挿し付けられる春挿し、あるいは９月上旬〜１０月中旬に補完的に行われる秋挿しがある。また、夏の挿し木は一般的に梅雨挿しが中心で、梅雨明けの高温期には行われない。理由としては、高温のため、発根に最適な環境を作り出すことが難しいばかりでなく、挿し穂の蒸散・呼吸が活発であるため、枯れやすく発根させることが難しいことが上げられる。冬挿しも、特別挿し木の適期ではないが、発根容易な植物や、温室植物等、付加価値の高い植物に限られる。
Sugi is no exception, as post-war reforested land has entered the main cutting season and there is an urgent need to develop a seedling production system for forestry. Japanese cedar seedlings are produced mainly by seedlings, but in the Kyushu region, seedlings are raised by cuttings. Cutting seedlings in Kyushu are generally practiced by cutting green branches in the open ground.
The cuttings in the Kyushu region are mainly spring cuttings that are inserted from mid-March to mid-April, when the shoots are about the size of a rice grain, or autumn cuttings that are complementarily performed from early September to mid-October. is there. In addition, cuttings in summer are generally centered on the rainy season, and are not performed during the high temperature period after the rainy season. The reason is that not only it is difficult to create an optimal environment for rooting due to high temperature, but also the transpiration and respiration of the cuttings are active, so that it is difficult to root easily. Winter cutting is not the appropriate time for special cuttings, but is limited to plants with high added value, such as plants that are easy to root and greenhouse plants.
ところで一般樹木の挿し木の時期は、一年を通じて、それぞれ春、夏、秋および冬に挿し木が行われる、春挿し、夏挿し、秋挿しおよび冬挿しがある。しかしながら、冬挿しは一般的ではなく、発根が容易な植物や出荷期を狙った挿し木等において、温室等を利用して保温条件下において行われることがあるにすぎない。
また、スギについては、粗放的な露地生産において冬挿しは行われないことはいうに及ばず、後述する施設を用いた育苗方法においても冬挿しは行われていない。すなわち、冬穂の利用は、一般的な挿し木技術としては存在するが、スギの挿し木においては作付け体系に組み入れられてないし、その報告も存在しない。
By the way, the cutting time of general trees includes spring cutting, summer cutting, autumn cutting and winter cutting, in which cuttings are performed in spring, summer, autumn and winter, respectively, throughout the year. However, winter cutting is not common and is often performed under heat-retaining conditions using a greenhouse or the like in plants that are easy to root or cuttings that are aimed at the shipping season.
In addition, cedars are not winter-inserted in the seedling method using the facilities described later, not to mention that winter inserts are not performed in the rough field production. In other words, the use of winter ears exists as a general cutting technique, but cedar cuttings are not incorporated into the planting system, and there is no report on it.
他方において、野菜類、花卉類またはある種の樹木の挿し木苗の生産においては、挿し木を低温にさらす手法が知られている（特許文献１〜４、非特許文献１）。
具体的には、特許文献１および２には、広葉樹において休眠中の苗木を用いて発根させる技術およびサツキ、ツツジにおいて、休眠期を経過した母樹から採穂して挿し木する方法が、それぞれ開示されている。
On the other hand, methods for exposing cuttings to low temperatures are known in the production of cuttings and seedlings of vegetables, flowering plants or certain trees (Patent Documents 1 to 4, Non-Patent Document 1).
Specifically, Patent Documents 1 and 2 disclose a technique for rooting using a dormant seedling in a broad-leaved tree, and a method of cutting and cutting a tree from a mother tree that has passed the dormancy period in Satsuki and Azalea, respectively. Has been.
また、特許文献３には、ナスおよびトマト等の野菜類、キク、ならびにキョウチクトウおよびポプラの樹木につき、挿し木の葉が露出する雰囲気の温度を養生水よりも低い温度（０〜２０℃）に維持して養生することを特徴とする植物の挿し木苗の育苗方法が開示されている。
特許文献４には、切り花用の草植物または花木（切り花用の草植物はキクまたはカーネーションであり、また花木はバラ、ウメ、モモ、ブドウ、カキ、ナシ、キーウイまたはミカン）の茎または枝を切り取ることによって得られた挿し穂または挿し木を、冷蔵庫内で１℃〜５℃、好ましくは２℃〜３℃の温度の空気中に６日間〜21日間、好ましくは７日間〜14日間保存することによって挿し穂または挿し木を低温処理することを含む方法が開示されている。
In Patent Document 3, for the vegetables such as eggplant and tomato, chrysanthemum, and oleander and poplar trees, the temperature of the atmosphere in which the cuttings are exposed is maintained at a lower temperature (0 to 20 ° C.) than the curing water. A method for raising a plant cutting seedling of a plant characterized in that it is cured is disclosed.
In Patent Document 4, the stem or branch of a cut flower plant or flower tree (the cut flower plant is chrysanthemum or carnation, and the flower tree is rose, plum, peach, grape, oyster, pear, kiwi or mandarin orange). The cuttings or cuttings obtained by cutting are stored in air at a temperature of 1 ° C to 5 ° C, preferably 2 ° C to 3 ° C in a refrigerator for 6 to 21 days, preferably 7 to 14 days. Discloses a method comprising cryogenic treatment of cuttings or cuttings.
非特許文献１には、弱光かつ低温の環境下でキュウリの挿し木の開放端を局所的に温い培養液に浸漬させることにより、植物の消耗を抑えつつ効率的に発根を促進させる方法が開示されている。
非特許文献２には、通常、長さ４０〜５０ｃｍのスギ挿し穂（通常挿し穂）が用いられるのに対し、通常挿し穂の約半分の大きさの２０ｃｍの小型挿し穂を秋に採穂し、露地に挿し付けるスギ苗木の育苗方法が開示されている。
Non-Patent Document 1 discloses a method of efficiently promoting rooting while suppressing plant consumption by immersing the open end of a cucumber cutting in a warm culture solution in a low light and low temperature environment. It is disclosed.
Non-Patent Document 2 usually uses cedar cuttings of 40-50 cm in length (usually cuttings), whereas 20 cm small cuttings, about half the size of normal cuttings, are picked in the fall. However, a method for raising a cedar seedling to be inserted into an open field is disclosed.
また、スギ苗木を育苗する技術として、環境条件の調整が可能な施設内において挿し木を行う方法も知られている。とくに、コンテナ苗による省力化、低コスト化が図られ、徐々に普及しつつある。しかしながら、当該コンテナ苗および施設を用いる方法においても、挿し木の時期は露地の場合と同様に３月中旬〜４月中旬または９月上旬〜１０月中旬であるため、周年生産および大量生産は依然として不可能である。 As a technique for raising cedar seedlings, a method of cuttings in a facility where environmental conditions can be adjusted is also known. In particular, labor saving and cost reduction by container seedling are being promoted and gradually spreading. However, in the method using the container seedling and the facility, the cuttings are from mid-March to mid-April or from early September to mid-October, as in the case of the open ground, so annual production and mass production are still unacceptable. Is possible.
近年国産木材の需要が高まっているにもかかわらず植林用スギの挿し木苗の供給体制はむしろ衰退しているため、大量の苗木を効率的に供給できる体制が必要とされている。
それにもかかわらず、上記のとおりスギの挿し木育苗は採穂時期が限られているのが現状であるため、例えば春先には採穂および挿し付け作業が集中し、苗木生産業者の生産能力の制限因子となっている。また、非特許文献２に記載されているように、小型挿し穂を秋に採穂し、挿し付ける育苗方法もあるが、該方法においては育苗に１年半という通常の方法より半年長い時間を要する。したがって、該方法は大量の苗木を効率的に供給できる育苗方法ではない。
また、本発明者らは、スギの挿し穂を周年で挿し付け発根率を調査したところ、春挿しの適期以降の挿し穂は、枯れやすいことと、発根率が極めて低く、挿し木には不適であることを確認し、夏場の挿し木を適切に行う技術が必要であることも明らかになった。
したがって、とくに温室を利用して通年育苗によって挿し木苗の効率的な大量生産において、採穂作業、挿し木作業の平準化の課題を解決することは急務である。
今後主伐期を迎える大量の国産材を安定的に市場へ供給するためには、伐採作業も市場のニーズに合わせて周年で行う必要がある。その際、今後低コスト林業を考えた場合、植林も伐採作業と同時並行で行う必要があることから、そういった意味でも良質な苗木を季節を問わず供給する体制が求められている。
Despite the increasing demand for domestic timber in recent years, the supply system for cuttings and seedlings for afforestation cedar has rather declined, so a system that can efficiently supply a large amount of seedlings is required.
Nonetheless, as mentioned above, cedar cuttings have a limited heading time, so for example, the harvesting and insertion work is concentrated in early spring, limiting the production capacity of seedling producers. It is a factor. In addition, as described in Non-Patent Document 2, there is a seedling raising method in which small cuttings are picked and inserted in the fall, but in this method, the seedlings have a half year longer than the usual method of one and a half years. Cost. Therefore, this method is not a seedling raising method that can efficiently supply a large amount of seedlings.
In addition, when the present inventors investigated the rooting rate by inserting cedar cuttings at the anniversary, cuttings after the appropriate period of spring cutting are likely to wither, and the rooting rate is extremely low. It was confirmed that this technique is inappropriate, and it is also necessary to have a technique for appropriately performing cuttings in summer.
Therefore, it is an urgent task to solve the problem of leveling of heading and cutting operations, especially in efficient mass production of cuttings by year-round seedlings using a greenhouse.
In order to stably supply a large amount of domestically-produced timber that will reach the main harvesting period in the future, it is necessary to carry out logging work at the anniversary according to the needs of the market. At that time, considering low-cost forestry in the future, it is necessary to plant trees at the same time as logging work, so in that sense, a system for supplying high-quality seedlings regardless of the season is required.
すなわち、スギの挿し木苗の大量生産において、採穂作業、挿し木作業の平準化のためにスギの挿し木苗の生産効率を向上せしめる技術を確立することは、早急に解決されるべき喫緊の課題なのである。 In other words, in mass production of cedar cutting seedlings, it is an urgent issue that should be solved as soon as possible to establish a technique to improve the production efficiency of cedar cutting seedlings for leveling of heading and cutting work. is there.
本発明者らは、上記課題を解決すべく鋭意研究を重ねた結果、これまで用いることが検討されていなかった時期のスギ挿し穂を用いることにより、従来より効率的にスギの挿し木苗を生産でき周年生産が可能になることを見出し、さらに研究を進めた結果本発明を完成するに至った。
より具体的には、以下の確認された事項に基づく：
（１）高温期において、低温期に採穂された挿し穂を利用することで、発根の歩留まりが夏に採穂されたものに比べて顕著に良好であること。
（２）低温期において、低温期に採穂された挿し穂を利用し、さらに施設内で発根最適条件に制御することで、他の時期に比べて極めて高い発根率、発根量が得られること。
As a result of intensive studies to solve the above problems, the present inventors produce cedar cutting seedlings more efficiently than before by using cedar cutting ears that have not been studied for use until now. As a result of finding out that the anniversary production is possible and further researching, the present invention has been completed.
More specifically, based on the following identified items:
(1) In the high temperature period, the rooting yield should be remarkably better by using the cuttings picked in the low temperature period compared with those picked in the summer.
(2) In the low temperature period, by using the cuttings picked in the low temperature period and further controlling the optimal rooting conditions in the facility, the rooting rate and the amount of rooting are extremely high compared to other periods. To be obtained.
すなわち本発明は、少なくとも以下の発明に関する：
（１）スギの穂を、挿し付けた後に温度調節された施設内において生育せしめて、該スギの穂をスギの苗木とするスギの苗木を製造する方法であって、前記スギの穂は、秋または冬に採穂され、前記挿し木がなされる前に低温処理に付された穂である、スギの苗木を製造する方法。
（２）低温処理が採穂前のスギの穂に行われ、該スギの穂は低温処理に付された後に１２月〜２月に採穂される、前記いずれかの方法。
（３）低温処理が採穂後のスギの穂に行われ、該スギの穂は採穂が１０月〜１１月に行われた穂である、前記いずれかの方法。
（４）採穂後のスギの穂が、さらに冷蔵に付される、前記いずれかの方法。
（５）低温処理が、採穂前の穂を母樹上において低温に曝露する工程を含む、前記いずれかの方法。
（６）低温の場所への秋挿しまたは冬挿しによる挿し木による低温処理または冷蔵による低温処理であり、該低温処理された穂を夏に育苗用容器（以下、コンテナと記載することがある）に床替えし、温度調節された施設内における生育に付することをさらに含む、前記いずれかの方法。
（７）温度調節された施設内における生育が秋または冬に行われ、該施設における温度調節された温度が、夜温１０°Ｃ以上および／または平均温度２０°Ｃ以上３５°Ｃ以下である、前記いずれかの方法。
（８）さらに湿度が調節され、該湿度が相対湿度６０％以上である、前記いずれかの方法。
（９）挿し付けされた穂の密度が１５０株／ｍ２以上である、前記方法。
（１０）前記いずれかの方法および通常の春挿しによるスギの苗木の製造を１年の間に組み合わせて行い、スギの苗木を周年で大量に製造する方法。
（１１）前記（２）の方法および前記（３）の方法を含む、前記方法。
（１２）採穂後のスギの穂に行われる低温処理が、採穂された穂の低温の場所への秋挿しまたは冬挿しによる挿し木による低温処理または冷蔵による低温処理であり、該低温処理された穂を夏にコンテナに床替えし、温度調節された施設内における生育に付することをさらに含む、前記方法
That is, the present invention relates to at least the following inventions:
(1) A method for producing a cedar seedling by growing a cedar ear in a temperature-controlled facility after being inserted, and using the cedar ear as a cedar seedling, wherein the cedar ear is A method for producing a cedar seedling, which is an ear picked in autumn or winter and subjected to a low-temperature treatment before the cuttings are made.
(2) The method according to any one of the above methods, wherein the low-temperature treatment is performed on the cedar ears before picking, and the cedar ears are picked from December to February after being subjected to the low-temperature treatment.
(3) The method according to any one of the above, wherein the low-temperature treatment is performed on the cedar spikes after harvesting, and the cedar spikes are spikes performed in October to November.
(4) The method according to any one of the above methods, wherein the spiked cedar ears are further refrigerated.
(5) The method according to any one of the above, wherein the low temperature treatment includes a step of exposing the ears before harvesting to a low temperature on the mother tree.
(6) Low-temperature treatment by cuttings by autumn or winter insertion in cold places or low-temperature treatment by refrigeration, and the low-temperature treated ears in a container for raising seedlings (hereinafter sometimes referred to as containers) in summer Any of the above methods further comprising changing floors and subjecting to growth in a temperature controlled facility.
(7) Growth in the temperature-controlled facility is performed in autumn or winter, and the temperature-controlled temperature in the facility is 10 ° C or higher at night temperature and / or 20 ° C or higher and 35 ° C or lower in average temperature. Any of the above methods.
(8) The method according to any one of the above, wherein the humidity is further adjusted and the relative humidity is 60% or more.
(9) The said method whose density of the inserted ear is 150 strains / m < 2 > or more.
(10) A method for producing a large number of cedar seedlings in a year by combining any one of the above methods and ordinary cedar seedlings by spring insertion during one year.
(11) The said method including the method of said (2) and the method of said (3).
(12) The low-temperature treatment performed on the cedar ears after harvesting is a low-temperature treatment by cutting or cutting in the autumn or winter insertion of the collected ears at a low temperature, and the low-temperature treatment by refrigeration The method further comprising: changing the container into a container in summer and subjecting the ear to growth in a temperature-controlled facility.
スギの挿し木苗生産では、春挿しを中心とし秋挿しが補完的に行われていたにすぎず、夏挿しまたは冬挿しを行うことはこれまで実施されていないばかりでなく、検討されることさえなかった。しかし本発明によれば、夏挿しまたは冬挿しにより生産効率の高いスギ挿し木苗の製造が可能になる。
本発明における方法においては、最終的に挿し木苗になる穂の歩留まりが優れている。すなわち、前記のとおり夏の挿し木は、高温のため発根に最適な環境を作り出すことが難しいばかりでなく、挿し穂の蒸散・呼吸が活発であるため挿し木後の苗が枯れやすく、発根率が低いといった理由により行われなかったという背景に鑑みれば、本発明においては高温環境下でもほとんど枯れることがなく高い発根率を達成し得ることは、当業者といえども到底予測することができない顕著な効果である。
本発明の方法によれば、さらに、秋から冬に採穂されたスギの挿し穂について、挿し付けの後、温度調節された施設において発根に好適な環境条件を作ることにより、一般的に採穂される時期における挿し穂より発根力（発根率、発根勢）を高くすることができ、もって歩留まりが高く効率的で、低コストのスギの挿し木苗生産が可能になる。
In the production of Japanese cedar cuttings, only the spring cutting is mainly used for the fall, and the summer or winter cutting has not been carried out so far, and even it may be considered. There wasn't. However, according to the present invention, it is possible to produce cedar-cutting seedlings with high production efficiency by summer insertion or winter insertion.
In the method according to the present invention, the yield of ears that finally become cutting seedlings is excellent. That is, as described above, summer cuttings are not only difficult to create an optimal environment for rooting due to high temperatures, but also the transpiration and respiration of the cuttings are active, so that the seedlings after cuttings tend to wither, and the rooting rate In view of the background that it was not performed due to the reason that it is low, it is impossible for even those skilled in the art to predict that a high rooting rate can be achieved in the present invention without dying even in a high temperature environment. It is a remarkable effect.
According to the method of the present invention, for the cuttings of Japanese cedar picked from autumn to winter, after insertion, generally by creating environmental conditions suitable for rooting in a temperature-controlled facility, The rooting power (rooting rate, rooting vigor) can be made higher than the cuttings at the time of harvesting, and the yield is high, efficient, and low-cost cedar cuttings can be produced.
本発明の方法のうち、低温処理が採穂前のスギの穂に行われ、該スギの穂は低温処理に付された後に１２月〜２月に採穂され挿し付けされる方法によれば、スギ挿し木苗の製造をさらにより一層高い生産効率で行うことができる。
例えば３月〜４月に集中する採穂作業を、１２月から行うことにより、作業期間の延長が可能であり、労働力の平準化が可能となる。これにより、人件費の削減、作業効率が改善される。とくに冬季は育苗作業の端境期であることから、平準化の効果は極めて大きい。
According to the method of the present invention, low-temperature treatment is performed on cedar spikes before picking, and the cedar spikes are picked and inserted in December to February after being subjected to low-temperature treatment. In addition, cedar cuttings can be produced with even higher production efficiency.
For example, by performing the heading work concentrated in March to April from December, the work period can be extended and the work force can be leveled. This reduces labor costs and improves work efficiency. In particular, the leveling effect is extremely large because the winter season is an off-season for raising seedlings.
本発明の方法のうち、低温処理が採穂後のスギの穂に行われ、該採穂が１０月〜１１月に行われる方法によれば、より効率的に挿し木苗の製造を行うことができる。
本発明の方法のうち、採穂後のスギの穂が、さらに冷蔵に付される方法、または低温処理が、採穂前の穂を母樹上において低温に曝露する工程を含む方法によれば、さらにより効率的に挿し木苗の製造を行うことができる。冷蔵の方法として冷蔵庫等で貯蔵することにより、これまで採穂不適期とされていた時期を含む、発根力の高い挿し穂をいつでも挿し木に用いることが可能となり、挿し木作業の効率化、得苗率の向上が達成される。
According to the method of the present invention, low-temperature treatment is performed on cedar spikes after harvesting, and the harvesting is performed from October to November, so that cutting seedlings can be produced more efficiently. it can.
Among the methods of the present invention, according to the method in which the ears of cedar after harvesting are further subjected to refrigeration, or the low temperature treatment includes a step of exposing the ears before harvesting to a low temperature on the mother tree, Furthermore, cuttings can be produced more efficiently. By storing it in a refrigerator or the like as a refrigeration method, it is possible to use cuttings with high rooting ability at any time, including periods that have been regarded as inappropriate for heading so far, making cuttings more efficient and effective. Improvement of seedling rate is achieved.
本発明の方法のうち、低温処理が、採穂された穂の低温の場所への秋挿しまたは冬挿しによる挿し木による低温処理または冷蔵による低温処理であり、該低温処理された穂を夏にコンテナに床替えし、温度調節された施設内における生育に付することをさらに含む方法によれば、スギ挿し木苗の製造をより簡便に行うができる。
該方法のうち、秋挿しまたは冬挿しによる挿し付けの後、所定日数経過後に穂における発根の有無を調査し、発根していないことが確認された穂を温度調節された施設内における生育に付することを含む方法によれば、スギ挿し木苗の製造における歩留りを一層高めることができる。
Among the methods of the present invention, the low-temperature treatment is a low-temperature treatment by autumn cutting or winter insertion at a low-temperature location of the collected ears or cutting by winter cutting or low-temperature treatment by refrigeration, and the low-temperature treated ears are containerized in summer According to the method that further includes changing the floor and subjecting it to growth in a temperature-controlled facility, it is possible to more easily produce a cedar-cutting seedling.
Of these methods, after insertion by autumn or winter insertion, the presence or absence of rooting in the ears was investigated after a predetermined number of days, and the ears that were confirmed not rooted were grown in a temperature-controlled facility. According to the method including attaching to, the yield in manufacture of a cedar cutting seedling can be further improved.
本発明の方法のうち、温度調節された施設内における生育が秋または冬に行われ、該施設における温度調節された温度が、夜温１０°Ｃ以上および／または平均温度２０°Ｃ以上３５°Ｃ以下である方法、またはさらに施設内における湿度が調節され、該湿度が相対湿度６０％以上である方法によれば、より効率的に挿し木苗の製造を行うことができる。
本発明の方法のうち、挿し付けされた穂の密度が１５０株／ｍ２以上である方法によれば、スギ挿し木苗の製造をより一層高い生産効率で行うことができる。
Among the methods of the present invention, growth in a temperature-controlled facility is carried out in autumn or winter, and the temperature-controlled temperature in the facility is a night temperature of 10 ° C or higher and / or an average temperature of 20 ° C or higher and 35 °. According to a method of C or less, or a method in which the humidity in the facility is adjusted and the relative humidity is 60% or more, cuttings and seedlings can be produced more efficiently.
Among the methods of the present invention, according to the method in which the density of the spiked ears is 150 strains / m 2 or more, it is possible to produce cedar-cutting seedlings with higher production efficiency.
本発明の上記いずれかの方法および通常の春挿しによるスギの苗木の製造を１年の間に組み合わせて行い、スギの苗木を周年で大量に製造する方法によれば、スギ挿し木苗の周年生産を行うことができる。
本発明の上記方法のうち、上記（２）の方法および上記（３）の方法を含む方法によれば、スギ苗木の周年生産をより効率的に行うことができるばかりでなく、作業の平準化も達成される。
本発明の上記方法のうち、採穂後のスギの穂に行われる低温処理が、採穂された穂の低温の場所への秋挿しまたは冬挿しによる挿し木による低温処理または冷蔵による低温処理であり、該低温処理された穂を夏にコンテナに床替えし、温度調節された施設内における生育に付することをさらに含む方法によれば、冬挿しおよび夏挿しによってスギ苗木の周年生産をより一層効率的に行うことができる。
According to any one of the above-described methods of the present invention and the method of producing cedar seedlings by usual spring cutting in one year, and producing a large number of cedar seedlings in a year, the annual production of cedar cutting seedlings It can be performed.
Of the above methods of the present invention, according to the method (2) and the method including the method (3), not only can the annual production of cedar seedlings be performed more efficiently, but also the leveling of work. Is also achieved.
Among the above methods of the present invention, the low-temperature treatment performed on the cedar ears after harvesting is low-temperature treatment by cutting or cutting by cold insertion in the cold place of the harvested ear or by winter insertion. The method further comprising changing the low-temperature-treated ear into a container in summer and subjecting it to growth in a temperature-controlled facility further increases the annual production of cedar seedlings by winter insertion and summer insertion. Can be done efficiently.
本明細書において、「挿し穂」の語は、苗木の育苗を目的としてスギの母樹から分離された穂を含む小枝部分を意味するものとして用いられる。
本明細書において、「秋挿し」および「冬挿し」の語は、本技術分野における通常の意味である秋に挿し木を行うことおよび冬に挿し木を行うことをそれぞれ意味する。秋および冬は、それぞれおおよそ１０月〜１１月およびおおよそ１２月〜２月の時期を意味するところ、地域における気候および年度による変動ならびに本発明の効果を考慮して異なる解釈も可能である。例えば、１１月下旬〜１２月上旬の期間は、秋と解される地域・年度もあれば、冬と解される地域・年度もある。
本明細書において、「挿し木する」および「挿し付ける」の語は同義に用いられ、いずれも挿し穂を植え付ける工程を意味する。
In the present specification, the term “cutting ear” is used to mean a twig portion containing a spike separated from a cedar mother tree for the purpose of raising seedlings.
In the present specification, the terms “autumn cutting” and “winter cutting” mean cutting in autumn and cutting in winter, which are the usual meanings in this technical field. Autumn and winter mean approximately October to November and approximately December to February, respectively, and different interpretations are possible in view of regional climate and year-to-year variations and the effects of the present invention. For example, during the period from late November to early December, there are regions / years that are interpreted as autumn and regions / years that are interpreted as winter.
In this specification, the words “cutting” and “inserting” are used synonymously, and both mean the process of planting cuttings.
本発明は、スギの穂を、挿し付けた後に温度調節された施設内において生育せしめて、該スギの穂をスギの苗木とするスギの苗木を製造する方法であって、前記スギの穂は、秋または冬に採穂され、前記挿し付けがなされる前に低温処理に付された穂である、スギの苗木を製造する方法である。
秋〜冬の低温下において、多くの植物は凍結しないように体内の浸透圧を高めるため糖等の炭水化物の量が高まること、さらに体内の糖等の炭水化物の量の上昇が発根率を高めることが報告されている。理論に束縛されることを望むものではないが、かかる現象と同様なメカニズムが、スギの挿し木において本発明の効果が奏される要因の一つである可能性がある。
The present invention is a method of producing a cedar seedling by growing the cedar ear in a temperature-controlled facility after being inserted, and using the cedar ear as a cedar seedling. This is a method for producing a cedar seedling that is picked in autumn or winter and subjected to a low-temperature treatment before the insertion.
Under low temperatures from autumn to winter, many plants increase the amount of carbohydrates such as sugar to increase the osmotic pressure in the body so that they do not freeze, and the increase in the amount of carbohydrates such as sugar increases the rooting rate. It has been reported. Although not wishing to be bound by theory, there is a possibility that a mechanism similar to this phenomenon is one of the factors that exert the effect of the present invention in the cuttings of cedar.
特許文献３には、常緑樹であるキョウチクトウについて、挿し木の葉が露出する雰囲気の温度を養生水よりも低い温度（０〜２０℃）に維持して養生することを特徴とする植物の挿し木苗の育苗方法が開示されている。しかしながら、該方法において用いられる穂は、秋または冬に採穂されたものではない。秋または冬に採穂された穂を用いることについては、特許文献１〜２および４ならびに非特許文献１にも何らの教示も与えられていない。しかも、これらの文献は、挿し木の対象としてスギについて記載するものでもない。 Patent Document 3 discloses that an oleander, an evergreen tree, is cured by maintaining the temperature of the atmosphere in which cutting leaves are exposed at a temperature lower than the curing water (0 to 20 ° C.). A method is disclosed. However, the ears used in the method are not harvested in autumn or winter. No teaching is given in Patent Documents 1 to 2 and 4 and Non-Patent Document 1 regarding the use of spikelets collected in autumn or winter. Moreover, these documents do not describe cedar as an object of cutting.
非特許文献２には、通常の挿し穂の約半分の長さの２０ｃｍの小型のスギの穂を秋に採穂し、露地に挿し付けるスギ苗木の育苗方法が開示されている。しかしながら、該方法においては、育苗は温度調節された施設内で行われるのではなく露地にて行われ、育苗に１年半以上を要する。また、本発明の方法においては、用いられるスギの穂の大きさは限定されず、約２０ｃｍ〜約４０ｃｍでよい。
したがって、本発明の方法は、上記各従来技術とはまったく別異の方法である。
Non-Patent Document 2 discloses a method for raising a cedar seedling, which is obtained by picking a 20 cm small cedar spike, which is about half the length of a normal cutting spike, in the autumn and inserting it in the open ground. However, in this method, raising seedlings is not performed in a temperature-controlled facility, but in an open field, and it takes one and a half years to grow seedlings. Moreover, in the method of this invention, the magnitude | size of the cedar spike used is not limited, About 20 cm-about 40 cm may be sufficient.
Therefore, the method of the present invention is a completely different method from the above conventional techniques.
本発明における温度調節された施設は限定されないところ、通常の温室や実験室ならびに恒温室等を挙げることができる。
また、本発明における低温処理における温度は限定されず、スギの苗木の生産地の一つである九州地方の冬季の気温が基準になる。低温処理における温度は、例えば日最高気温が約１５°Ｃ未満であり、日最低気温が約１２°Ｃ未満である本発明の方法は好ましい。
本発明において低温処理は、低温処理の状態にない状態を間に挟んで２回以上行ってもよい。また、１回の低温処理の期間は限定されず、また、低温処理の温度によって適宜調整してよい。１回の低温処理の期間は、例えば約０．５ヶ月以上の期間であり、１ヶ月以上の期間または２ヶ月以上の期間であってよい。
The temperature-controlled facility in the present invention is not limited, and examples thereof include a normal greenhouse, a laboratory, and a temperature-controlled room.
In addition, the temperature in the low-temperature treatment in the present invention is not limited, and the winter temperature in the Kyushu region, which is one of the cedar seedling production areas, is a standard. The temperature of the low temperature treatment is preferably the method of the present invention in which the daily maximum temperature is less than about 15 ° C and the daily minimum temperature is less than about 12 ° C.
In the present invention, the low temperature treatment may be performed twice or more with a state not in the state of the low temperature treatment in between. Further, the period of one low temperature treatment is not limited, and may be appropriately adjusted depending on the temperature of the low temperature treatment. The period of one low temperature treatment is, for example, a period of about 0.5 months or more, and may be a period of 1 month or more or a period of 2 months or more.
本発明の方法において挿し穂の密度は限定されないところ、挿し付けされた穂の密度が約１５０本／ｍ２以上である本発明の方法は大量生産をするために好ましい。挿し付けされた穂の密度として、約２００株／ｍ２以上はより好ましく、約２４０株／ｍ２以上は最も好ましい。通常の露地における挿し穂においては、密度は約１００株／ｍ２にすぎない。
本発明の方法において挿し穂の密度を上記のように高めることができるのは、挿し付けされる穂が低温処理に付されているため、光合成および蒸散のバランスが安定し発根力が高まっていることから直ちに発根し、高密度の挿し木を行っても過湿による枯れが少ないからであると考えられる。
In the method of the present invention, the density of the cutting spike is not limited, but the method of the present invention in which the density of the inserted spike is about 150 / m 2 or more is preferable for mass production. The density of the spiked ear is more preferably about 200 strains / m 2 or more, and most preferably about 240 strains / m 2 or more. In the cuttings in a normal open field, the density is only about 100 strains / m 2 .
In the method of the present invention, the density of the cutting ears can be increased as described above because the ears to be inserted are subjected to low-temperature treatment, so that the balance between photosynthesis and transpiration is stabilized and rooting power is increased. This is considered to be because it rooted immediately, and even with high density cuttings, there is little withering due to excessive humidity.
本発明の方法において、挿し木がなされる穂の採穂の時期は、秋または冬であれば限定されない。低温処理が、採穂前のスギの穂に母樹上において行われ、該スギの穂は低温処理に付された後に１２月〜２月に採穂される本発明の方法は好ましい。また、低温処理が採穂後のスギの穂に行われ、該採穂が１０月〜１１月に行われる本発明の方法も好ましい。
挿し付けされる穂の採穂を行う時期は、スギの穂が紅葉する地域においては、紅葉する時期を目安に判断してよい。かかる地域においては、紅葉が通常開始される前後の、それぞれ約１ヶ月間の間において採穂を行ってよい。
採穂を行う時期はまた、穂の紅葉の程度により判断してよい。例えば、紅葉後に採穂をされる穂は、穂全体の約１０％以上が紅葉している状態であってもよい。
In the method of the present invention, the timing of picking ears for cutting is not limited as long as it is autumn or winter. A method of the present invention is preferred in which the low-temperature treatment is performed on the cedar ears before picking on the mother tree, and the cedar ears are picked from December to February after being subjected to the low-temperature treatment. Moreover, the method of the present invention in which the low-temperature treatment is performed on the cedar spikes after harvesting and the harvesting is performed from October to November is also preferable.
The timing for picking the ears to be inserted may be determined based on the time when the cedar ears are colored in an area where the cedar ears are colored. In such an area, the ears may be collected for about one month before and after the autumn leaves are normally started.
The timing of picking may also be judged by the degree of autumn leaves. For example, the ears picked after the autumn leaves may be in a state where about 10% or more of the whole ears are autumn.
また、本発明の方法においては、低温処理が、採穂前の穂を母樹上において低温に曝露する工程を含む方法においては、採穂後に低温処理に付さずに、直ちに挿し付けしてよい。かかる方法においては、低温処理を行う手間やコストを回避または抑制することができる。 Further, in the method of the present invention, in the method in which the low temperature treatment includes a step of exposing the ears before harvesting to a low temperature on the mother tree, the ear may be immediately inserted without being subjected to the low temperature treatment after the harvesting. . In such a method, it is possible to avoid or suppress the labor and cost of performing the low temperature treatment.
本発明の方法のうち、採穂された穂を、挿し付けする前に冷蔵に付することを含む方法は好ましい。低温処理を行うことによって、穂の内的条件をより発根に適したものにすることができる。また、低温処理により、挿し付けが行われるまで穂を貯蔵しておくこともできる。
冷蔵の方法は限定されないところ、冷蔵庫や低温チャンバーによる冷蔵が例示される。
Of the methods of the present invention, a method comprising subjecting the harvested ears to refrigeration prior to insertion is preferred. By performing the low temperature treatment, the internal condition of the ear can be made more suitable for rooting. Further, the ears can be stored by the low temperature treatment until the insertion is performed.
Although the method of refrigeration is not limited, refrigeration by a refrigerator or a low temperature chamber is exemplified.
本発明の方法のうち、低温処理が、採穂された穂を低温の場所に秋挿しまたは冬挿しによる挿し木による低温処理または冷蔵による低温処理であり、該低温処理された穂を夏にコンテナに床替えし温度調節された施設内における生育に付することをさらに含む方法は好ましい。前記低温の場所は露地であってよい。
当該方法において、秋挿しまたは冬挿しによる挿し付けの後、所定日数経過後に穂における発根の有無を調査し、発根していないことが確認された穂を温度調節された施設内における生育に付することを含む方法は好ましい。かかる方法によって、従来は発根させることを検討さえされることがなかった発根していない穂を、高い歩留まりで発根せしめ、もってスギの苗木に生育せしめることが可能である。
これらの夏季にコンテナに挿し付ける作型について、冬季に挿し付ける作型とともに図１に模式的に例示した。なお、冬季に挿し付ける作型においても、採穂後、コンテナに挿し付ける前に低温処理に付してよい。採穂時期が比較的早い場合（１０月〜１１月）には、低温処理を行うことが好ましい。また、気候の年次変動を考慮して、１２月に採穂された穂を適宜低温処理に付してもよい。
Among the methods of the present invention, the low-temperature treatment is a low-temperature treatment by cutting or cutting in a cold place where the spiked ears are inserted in a cold place in the autumn or winter, and the low-temperature treated ears are put in a container in the summer. Preferably, the method further comprises subjecting to growth in a temperature-controlled facility. The cold place may be an open field.
In this method, after the insertion by autumn or winter insertion, the presence or absence of rooting in the ears was investigated after a predetermined number of days, and the ears that were confirmed not rooted were grown in a temperature-controlled facility. A method comprising attaching is preferred. By this method, it is possible to root a non-rooted ear, which has not been considered to be rooted in the past, with a high yield and thereby grow on a cedar seedling.
The molds to be inserted into the container in the summer are schematically illustrated in FIG. 1 together with the molds to be inserted in the winter. In addition, even in the cropping mold to be inserted in winter, it may be subjected to a low-temperature treatment after picking and before inserting into the container. When the heading time is relatively early (October to November), it is preferable to perform low temperature treatment. Further, in consideration of the annual change in climate, the ears picked in December may be appropriately subjected to low-temperature treatment.
本発明の方法において、施設内の温度は、挿し付けされたスギの穂が発根・生育する温度に調節されていればよい。本発明において、温度調節された温度が、夜温１０°Ｃ以上および／または平均温度２０°Ｃ以上３５°Ｃ以下である方法は好ましい。夜温１５°Ｃ以上および／または平均温度２５°Ｃ以上３０°Ｃ以下である方法は、より好ましい。
本発明の方法において、施設内の温度以外の育苗条件は通常の条件を用いることができる。
In the method of the present invention, the temperature in the facility may be adjusted to a temperature at which the inserted cedar ears root and grow. In the present invention, a method in which the temperature-controlled temperature is 10 ° C. or higher and / or the average temperature is 20 ° C. or higher and 35 ° C. or lower is preferable. A method in which the night temperature is 15 ° C or higher and / or the average temperature is 25 ° C or higher and 30 ° C or lower is more preferable.
In the method of the present invention, normal conditions can be used for raising seedlings other than the temperature in the facility.
本発明の方法において、施設内の湿度はとくに限定されない。本発明の方法のうち、湿度が調節され、該湿度が相対湿度６０％以上である方法は好ましく、相対湿度７０％以上である方法はより好ましい。
本発明の方法において、他の条件や器具等は、施設を利用した通常のスギ挿し木苗を製造する方法におけるものを用いることができる。
本発明の方法において、施設内の光条件はとくに限定されないところ、採穂後の挿し穂の光合成および呼吸活性を抑制するために、施設の遮光が行われる方法は好ましい。遮光が行われる場合、遮光率は、４０％以上が好ましく、５０％以上がさらに好ましい。
本発明の方法のうち、挿し付け後の穂の生育が、温度条件に加えて湿度条件および光条件が調節された施設内において行われる方法は好ましい。
In the method of the present invention, the humidity in the facility is not particularly limited. Among the methods of the present invention, a method in which the humidity is adjusted and the humidity is 60% or more is preferable, and a method in which the relative humidity is 70% or more is more preferable.
In the method of the present invention, other conditions, instruments, and the like can be used in the method for producing a normal cedar cutting seedling using a facility.
In the method of the present invention, the light conditions in the facility are not particularly limited, but a method in which the facility is shielded is preferable in order to suppress photosynthesis and respiratory activity of the cuttings after harvesting. When light shielding is performed, the light shielding rate is preferably 40% or more, and more preferably 50% or more.
Among the methods of the present invention, a method in which the ear growth after insertion is performed in a facility where the humidity condition and the light condition are adjusted in addition to the temperature condition is preferable.
上記本発明の方法によれば、これまで作業が行われなかった秋から冬に採穂を行い、および／または夏に挿し木を行うことにより、作業を分散させることができるため、従来の方法より高い効率によってスギ苗の製造を行うことができる。また、本発明の方法を他の方法と組み合わせて用いることによって、スギの苗木をより大量に製造することが可能となる。
例えば、本発明の方法および通常の春挿しによるスギの苗木の製造を１年の間に組み合わせて行い、スギの苗木を周年で大量に製造する方法が挙げられる。かかる大量に製造する方法によれば、スギ苗木を周年に亘り供給することが可能になる。
According to the method of the present invention, the work can be dispersed by picking a head from autumn to winter and / or cutting in the summer, where the work has not been performed so far. Sugi seedlings can be produced with high efficiency. In addition, by using the method of the present invention in combination with other methods, it is possible to produce cedar seedlings in larger quantities.
For example, the method of the present invention and the production of cedar seedlings by ordinary spring cutting are combined in one year, and a method of producing a large number of cedar seedlings at the anniversary is mentioned. According to such a large-scale manufacturing method, it is possible to supply cedar seedlings throughout the year.
前記大量に製造する方法として、
・低温処理が採穂前のスギの穂に行われ、該スギの穂は低温処理に付された後に１２月〜２月に採穂され挿し付けされる方法および
・低温処理が採穂後のスギの穂に行われ、該採穂が１０月〜１１月に行われる方法を、
・通常の春挿しおよびその前における採穂によるスギの苗木の製造を組み合わせることは好ましい。かかる組み合わせによる大量製造方法の年間スケジュールの例を図２に示す。
通常の春挿しによるスギの苗木の製造は、施設を用いる方法あるいは施設を用いずに露地による方法のいずれでもよい。施設を用いる方法は、採穂の時期をずらすことにより、作業の平準化を伴うより大量のスギの苗木の製造が可能となるため好ましい。
上記方法のうち、採穂後のスギの穂に行われる低温処理が、採穂された穂の低温の場所への秋挿しによる挿し木による低温処理または冷蔵による低温処理であり、該低温処理された穂を夏にコンテナに床替えし、温度調節された施設内における生育に付することをさらに含む方法はより好ましい。該施設内の環境条件が、より発根に適した環境条件に調節された上記方法は一層より好ましい。かかる環境条件には光条件および温湿度条件が包含されるところ、それぞれ遮光およびミスト等によって調節してよい。
As a method for manufacturing the mass,
A method in which low-temperature treatment is performed on the cedar ears before harvesting, and the cedar ears are subjected to low-temperature treatment and then picked and inserted in December-February. A method in which the ears are picked from cedar ears and the ears are picked from October to November,
-It is preferable to combine the production of cedar seedlings by normal spring cutting and preceding harvesting. An example of the annual schedule of the mass production method by such a combination is shown in FIG.
Production of cedar seedlings by ordinary spring cutting may be either a method using a facility or a method using an open field without using a facility. A method using a facility is preferable because a larger amount of cedar seedlings can be produced with the leveling of work by shifting the timing of picking.
Among the above methods, the low-temperature treatment performed on the cedar spikes after harvesting is a low-temperature treatment by cutting or by refrigeration by cutting into the cold place of the harvested ear, and the low-temperature treatment was performed More preferably, the method further comprises changing the ears into containers in summer and subjecting the ears to growth in a temperature controlled facility. The above-described method in which the environmental conditions in the facility are adjusted to environmental conditions more suitable for rooting is even more preferable. Such environmental conditions include light conditions and temperature and humidity conditions, and may be adjusted by shading, mist, etc., respectively.
実施例によって、本発明をさらに詳細に説明するが、これらの実施例はいかなる意味においても本発明を限定するものではない。
（実施例１）
（１）目的 冬穂を用いた場合の、本発明の方法の効果を確認する。
（２）試験方法
・容器
容量２００ｍｌ（長さ１４０ｍｍ、上径５２ｍｍ、下径１５ｍｍ）のコンテナ（日新農工産業製３８連樹木用トレイ、商品名：トレイマスター）を用いた。挿し付け密度は２４８株／ｍ２であった。
・品種
オビアカを用いた。
・育苗方法
宮崎県日向市の採穂園にて２０１２年１月１３日または同年２月１４日に採穂された冬穂をコンテナに挿し付けし、温室内の密閉条件にて育苗を行った。２０１２年１月１３日に採穂した穂は、挿し付け時には穂全体の半分程度が紅葉した状態であった（図３Ａ）。
低温期には暖房機および密閉処理により加温・加湿を行った。ミスト、潅水は、時期に応じて適宜行った。
また、対照区として２０１１年９月１５日に採穂・挿し木を行い、温度調節を行わずにミスト処理によって育苗を行った。対照区において用いられた穂は紅葉していなかった（図３Ｂ）。
・調査
初期発根の時期を確認するとともに、挿し付け後１５０日目の発根状況として発根率および根の生育状況（地下部生体重）を調査した。
対照区については、挿し付け後１３４日目に同様に発根率および根の生育状況を調査した。
The present invention will be described in more detail by way of examples, but these examples do not limit the present invention in any way.
Example 1
(1) Purpose To confirm the effect of the method of the present invention when using winter ears.
(2) Test method / container A container having a capacity of 200 ml (length 140 mm, upper diameter 52 mm, lower diameter 15 mm) (38 consecutive tree tray made by Nissin Agricultural Industry, trade name: Tray Master) was used. The insertion density was 248 strains / m 2 .
-Variety Obiaka was used.
・ Seedling method Winter ears harvested on January 13, 2012 or February 14, 2012 at Hyho-shi in Hyuga City, Miyazaki Prefecture were inserted into containers, and seedlings were raised under sealed conditions in the greenhouse. . The ears harvested on January 13, 2012 were in a state where about half of the whole ears were colored at the time of insertion (FIG. 3A).
In the low temperature period, heating and humidification were performed by a heater and a sealing process. Mist and irrigation were performed appropriately according to the season.
In addition, as a control plot, the head was picked and cut on September 15, 2011, and the seedlings were raised by mist treatment without adjusting the temperature. The ears used in the control group were not colored (FIG. 3B).
-Survey The initial rooting time was confirmed, and the rooting rate and root growth status (underground weight) were investigated as the rooting status 150 days after insertion.
For the control group, the rooting rate and the growth of roots were similarly investigated on the 134th day after insertion.
（３）試験結果・考察
結果を下記表１にまとめた。
冬穂については、初期発根は挿し付け後６０日目に確認された。
また、挿し付け後１５０日目の発根状況については、発根率８８％（１月１３日採穂区）および９５％（２月１４日採穂区）であり、地下部生体重はそれぞれ９．２ｇ／株および６．０ｇ／株であった。これに対して対照区では、発根率６３％であり、地下部生体重は３．９ｇ／株であった。
以上の結果より、本発明の方法のスギ苗木を製造する方法により、スギ苗木を高い効率で製造できることが明らかになった。
For Fuyuho, initial rooting was confirmed 60 days after insertion.
In addition, regarding the rooting situation on the 150th day after insertion, the rooting rate is 88% (January 13 heading zone) and 95% (February 14 heading zone), They were 9.2 g / strain and 6.0 g / strain. In contrast, in the control group, the rooting rate was 63%, and the underground weight was 3.9 g / strain.
From the above results, it was clarified that a cedar seedling can be produced with high efficiency by the method for producing a cedar seedling of the method of the present invention.
（実施例２）
（１）目的 秋穂を用いた場合の、本発明の方法の効果を確認する。
（２）試験方法
・容器
容量１５０ｍｌ、深さ１５０ｍｍのスリット付きコンテナ（BCC社製、商品名：Flexi frame 77）を用いた。栽植密度は３６２株／ｍ２であった。
・品種
オビアカを用いた。
・育苗方法
下記の４種類の生産ロットを設けた：
(1) Purpose To confirm the effect of the method of the present invention when Akiho is used.
(2) Test method / container A container with a slit having a capacity of 150 ml and a depth of 150 mm (BCC, trade name: Flexi frame 77) was used. The planting density was 362 strains / m 2 .
-Variety Obiaka was used.
・ Nurse raising method The following four production lots were established:
挿し付け後の穂は温室内にて管理を行った。低温期には暖房機および密閉処理によりにより加温・加湿を行った。ミスト、潅水は、時期に応じて適宜行った。
なお、採穂は宮崎県日向市の採穂園において行った。
・調査
表２に示した挿し付け後日数が経過した日に、発根状況として発根率を調査するとともに苗の枯死率を調査した。
After insertion, the ears were managed in the greenhouse. In the low temperature period, heating and humidification were performed by a heater and a sealing process. Mist and irrigation were performed appropriately according to the season.
In addition, the harvesting was carried out in the harvesting garden in Hyuga City, Miyazaki Prefecture.
・ Survey On the day when the number of days after insertion shown in Table 2 has elapsed, the rooting rate was investigated as the rooting status and the seedling death rate was investigated.
（３）試験結果・考察
結果を下記表３にまとめた。
秋穂（秋に採穂した挿し穂）を一旦露地に挿し付けてから夏場にコンテナに床替えした生産ロット３においては、夏場の高温条件でも枯死がほとんどなく、春挿しの穂（生産ロット１）より発根率が高かった。一方、夏場に挿し付けたもの（生産ロット２）は、ほとんど発根せず、苗木の生産が実質的にできなかった。また、秋穂をそのままコンテナに挿し付けた場合(生産ロット４)も、発根率は比較的高かったが、生産ロット３には劣った（以上、表３）。以上の結果より、本発明の方法によれば、秋穂を高密度で挿し付けを行っても高い効率でスギ苗木の生産が可能であることが確認された。とくに、秋穂を一旦低温処理に付すことにより、発根状況が一層改善されることが明らかになった。 In production lot 3 where Akiho (cutting ear picked in autumn) was once inserted into the open ground and then replaced with a container in the summer, there was almost no death even under high temperature conditions in the summer, and the spring ear (production lot 1) The rooting rate was higher. On the other hand, what was inserted in the summer (production lot 2) hardly rooted and could not substantially produce seedlings. In addition, when Akiho was directly inserted into the container (production lot 4), the rooting rate was relatively high, but it was inferior to production lot 3 (Table 3 above). From the above results, according to the method of the present invention, it was confirmed that cedar seedlings can be produced with high efficiency even when Akiho is inserted at a high density. In particular, it was clarified that the rooting situation was further improved by subjecting Akiho to low temperature treatment.
本発明により、スギ挿し木苗の生産効率を従来の方法より高くすることが可能になり、また、作業の平準化が達成される。したがって、本発明はスギ挿し木苗の生産産業および関連産業の発展に寄与するところ大である。 According to the present invention, it is possible to increase the production efficiency of cedar cutting seedlings as compared with the conventional method, and leveling of work is achieved. Therefore, the present invention greatly contributes to the development of the cedar cutting seedling production industry and related industries.
Claims (6)
前記スギの穂を採穂前に低温処理に付した後、１２月〜２月に採穂し、
該採穂されたスギの穂を冷蔵に付した後に、穂の密度が１５０本／ｍ２以上となるようにコンテナに挿し付ける、スギの苗木を製造する方法。 A method for producing a Japanese cedar seedling by growing a Japanese cedar ear in a temperature-controlled facility after being inserted into a container, and using the cedar ear as a cedar seedling,
After the ears of cedar are subjected to low temperature treatment before picking, they are picked from December to February,
A method for producing a cedar seedling, wherein the cedar spikes are subjected to refrigeration and then inserted into a container so that the density of the spikes is 150 pieces / m 2 or more.
A method for producing a large number of cedar seedlings in a year by combining the method according to any one of claims 1 to 5 and production of a cedar seedling by ordinary spring insertion during one year.
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| JP6751626B2 (en) * | 2016-09-06 | 2020-09-09 | 住友林業株式会社 | How to grow cuttings of forest trees |
| JP2019106893A (en) * | 2017-12-15 | 2019-07-04 | 住友林業株式会社 | Reproduction method of rooted cutting of conifer |
| CN111837863B (en) * | 2020-07-28 | 2022-04-22 | 福建中烟工业有限责任公司 | Transplanting period-based cultivation method and system for Fujian fresh, sweet and fragrant high-quality tobacco leaves |
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