JP2013158283A - Method for growing wasabi seedling and artificially grown wasabi seedling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for growing a Wasabi seedling, which grows the Wasabi seedling in an artificial environment in which the Wasabi seedling can be supplied all the year.SOLUTION: A Wasabi seed is sown in a growth medium 22 in an artificial facility kept at a constant temperature while supplying water which may contain culture fluid and light, and Wasabi is grown from the development of a seed leaf 16 after germination until four to six leaves are developed in place of the seed leaf 16.

Description

  The present invention relates to a method for growing wasabi seedlings in an artificial environment and a wasabi seedling grown by the method.

  Wasabi is cultivated by planting wasabi seedlings in a wasabi field built near a clear stream such as natural springs. Wasabi seedlings are usually seeded from the wasabi parent strain and sowed closely in the growing soil, germinated, temporarily planted with 2 to 3 true leaves, and up to 5 to 6 true leaves that can be transplanted into the wasabi field. It is nurtured. In the wasabi field, where wasabi seedlings are planted, water at a constant temperature can be flowed annually using clear streams such as spring water, and wasabi is cultivated throughout the year.

  However, since wasabi seedlings are vulnerable to the heat of summer, in nature, seedlings for wasabi seedlings are limited to twice a year: spring sowing (around March) and autumn sowing (from November to December). It is necessary to select the right place. For this reason, wasabi seedlings are generally cultivated and transported over long distances in a cool place higher than the place where the wasabi field is provided, and the cost of transporting the wasabi seedlings becomes a problem. In order to reduce transportation costs, wasabi seedlings are once dug up from the growing soil, and the growing soil adhering to the roots, etc. is removed to be transported. As a result, the wasabi seedlings that have arrived at the planting site are weakened, and the survival rate of the wasabi fields is reduced.

  Further, a growing apparatus for wasabi seedlings and a growing method using the growing apparatus are described in Patent Document 1 below. In Patent Document 1, a wasabi seedling growing device is composed of a high-inclined flowing water panel, a medium-inclined flowing water panel, a low-inclined flowing water panel, a non-inclined flowing water panel, a flowing water adjustment tank, etc., and seedlings grow on both sides of the growing device. In response to this, a seedling feeder suspension frame designed so that the intervals between the seedling roots and the nutrient water flowing down each nutrient water flow panel are opened sequentially, and the seedling feeders are sequentially installed. A configuration in which the feed is advanced in a high direction is described. Further, in Patent Document 1, as a growing method using such a growing apparatus, in the method of growing a young wasabi seedling in a facility, conditions such as the temperature of the nutrient water, the amount of water, the water quality, the material composition of the medium, etc. It describes that a system that can be maintained in an optimal state for training is constructed.

  In this wasabi seedling growing device, it is possible to grow wasabi seedlings throughout the year, but since the seedlings of wasabi are grown into wasabi seedlings, it is necessary to transplant wasabi seedlings, May cause problems.

JP-A-6-303864

  The present invention has been made to solve the above-described problems, and provides a method for growing a horseradish seedling in an artificial environment capable of supplying a horseradish seedling throughout the year, and a horseradish seedling grown by the method. The purpose is to do.

  The method for growing a horseradish seedling according to claim 1, which has been made in order to achieve the above object, provides a nutrient solution to a growth medium in an artificial facility maintained at a constant temperature. While supplying water and light that may be contained, seeding wasabi seeds, germinating and developing cotyledons, and then growing until the main leaves expand to 4 to 6 instead of the cotyledons .

  The method for cultivating a horseradish seedling described in claim 2 is the method described in claim 1, wherein the wasabi seed has a cotyledon contained in a seed shell, and has a hair root shape on a 3-7 mm radicle. This is characterized in that the side root of the root is rooted.

  The method for growing a horseradish seedling described in claim 3 is the method described in claim 1, wherein the constant temperature is 18 to 20 ° C.

The method for growing a horseradish seedling described in claim 4 is the method described in claim 1, wherein the light containing light having a wavelength of 400 to 800 nm is supplied from a fluorescent lamp or a light emitting diode, and The light flux density with respect to the surface is 60 to 100 μmol / m ² · s.

  The method for growing a horseradish seedling described in claim 5 is the method described in claim 1, wherein the light is light introduced from natural light.

  The growing method of the wasabi seedling described in claim 6 is the method described in claim 1, wherein the nutrient solution has an electric conductivity of 0.2 to 0.35.

  The method for growing a horseradish seedling described in claim 7 is the method described in claim 1, wherein the growth medium may include soil, sand, small gravel, wood chips, cotton, paper, which may contain culture components. It is a growth medium selected from plastic chips and porous plastics.

  The growing method of the wasabi seedling described in claim 8 is the method described in claim 1, wherein the artificial facility is a movable facility.

  The method for growing a horseradish seedling described in claim 9 is the method described in claim 1, wherein the wasabi seed is immersed in a gibberellin-containing solution and then washed with sterilized water. And

  The wasabi seedling according to claim 10 was sown and germinated while supplying water and light that may contain nutrient solution to a growth medium in an artificial facility maintained at a constant temperature. Instead of cotyledons, it is grown until 4 to 6 true leaves are developed.

  According to the present invention, wasabi seedlings can be supplied throughout the year in an artificial facility maintained at a constant temperature, and seedling of wasabi seeds can be performed appropriately according to the demand for wasabi seedlings. In addition, by installing this artificial facility close to the place where wasabi seedlings such as wasabi fields are planted, it is possible to plant the wasabi seedlings with the growth medium attached to the roots of the wasabi seedlings. The survival rate of can be improved.

It is explanatory drawing explaining the germination state of a wasabi seed. It is explanatory drawing explaining the rooted horseradish seed in which the cotyledon was stored in the seed and the hairy root side root rooted to the young root. It is explanatory drawing explaining the rooted horseradish seed which rooted only the dotted | root-like young root. It is explanatory drawing explaining the state which the expansion of the wasabi cotyledon started. It is explanatory drawing explaining the growth condition at the time of seed | inoculating the root wasabi seed 10A shown in FIG.

  As the wasabi seed used in the present invention, the seed of this wasabi can be preferably used. This wasabi seed was ripened and broke out of dormancy. Specifically, it is a horseradish seed collected 50 to 60 days after the flowering season of the parent strain and stored for a certain period in an atmosphere of 3 to 5 ° C. As pretreatment before sowing seeds of wasabi seeds, first, gibberellin treatment is performed in which wasabi seeds are immersed in a gibberellin-containing solution at 10 to 15 ° C. for about 72 hours. Next, the gibberellin-treated wasabi seeds are washed several times with sterilized water. As the sterilizing water, electrolytic water having a sodium ion concentration of 200 ppm or less and a pH in the range of 4.5 to 6.8 can be suitably used. Such electrolyzed water is obtained by adding hydrochloric acid to water to which sodium chloride is not artificially added, passing the water to which hydrochloric acid has been added to the diaphragm electrolyzer, electrolyzing the water, and obtaining the electrolyzed water obtained. Can be obtained by diluting. Specifically, slightly acidic electrolyzed water (trade name: Pure Star Water) manufactured by Morinaga Milk Industry Co., Ltd. can be suitably used as sterilizing water.

  A large number of wasabi seeds subjected to such pretreatment are sown in a growth medium in an artificial facility maintained at a constant temperature. Such an artificial facility is preferably a movable facility so that it can grow wasabi seedlings at a place where water and electricity supply sources are provided close to a planting place such as wasabi field. The movable facility is preferably a container for transporting luggage that can be transported by being placed on a truck bed, in particular, a container for transporting frozen products that has been subjected to heat insulation. Such a container is provided with a temperature control device, a water supply device, a light source, and a nutrient solution supply device. It is preferable to maintain the temperature in such a facility at 18 to 20 ° C. Further, as such a growth medium, any one selected from soil, sand, small gravel, wood chips, cotton, paper, plastic chips, porous plastic which may contain culture components can be used and is commercially available. Culture soil can also be used.

  When sowing the wasabi seeds in the culture soil as a growth medium, it is preferable to cover the wasabi seeds placed on the surface of the culture soil thinly enough to be hidden by the culture soil. Covering thickly the wasabi seeds placed on the surface of the cultured soil with the cultured soil tends to delay germination from the wasabi seeds. In addition, the seeds of horseradish seeds may be sown together in a culture soil filled in a container such as a pot, but a cell tray having a plurality of recesses with through holes formed on the bottom can be suitably used. It is preferable to fill each of the concave portions of the cell tray with culture soil to about 80% of the volume of the concave portion, and to seed the culture soil of each concave portion with wasabi seeds. Wasabi seedlings grown using such cell trays can be planted in wasabi fields, etc. with the culture soil attached to the roots taken out from the recesses of the cell tray, and the survival rate of wasabi seedlings can be improved and labor saving can be achieved. .

The growth medium sowed with the wasabi seeds is placed in a facility maintained at 18 to 20 ° C., and a predetermined amount of light and water are supplied to the growth medium. Water supply uses tap water as sterilizing water, confirms that the surface of the growth medium has started to dry, and performs water supply to the bottom side of the growth medium. The light is preferably supplied with white light including light having a wavelength of 400 to 800 nm from a fluorescent lamp or a light emitting diode, and the light flux density with respect to the surface of the growth medium is preferably 60 to 100 μmol / m ² · s. In particular, when a fluorescent lamp is used as a light source, the light flux density is preferably 80 to 100 μmol / m ² · s. As this fluorescent lamp, a cold fluorescent tube can be suitably used. When a white light emitting diode (LED) is used as the light source, the light flux density is preferably 60 to 80 μmol / m ² · s. The irradiation time of this light amount is preferably 12 to 16 hours / day. The light may be natural light, for example, light introduced from sunlight.

  From the wasabi seeds sown in the growth medium of such germination environment, the germination state usually takes about 20 to 30 days. The germination state refers to a state in which cotyledons appear from wasabi seeds. FIG. 1 shows the germination state when horseradish seeds are sown in culture soil as a growth medium. The cotyledons 16 and 16 that emerge from the wasabi seed are usually in the culture soil 22 as shown in FIG. 1A, and a part of the handle 18 with the cotyledons 16 and 16 at the tip appears on the culture soil 22. To do. As shown in FIG. 1B, the cotyledons 16 and 16 expand on the culture soil 22 to become germinated seedlings 24. The germinated seedling 24 shown in FIG. 1B further grows into a seedling in which about two true leaves are developed.

  The seedlings are continuously irradiated with light having the above-mentioned light flux density, and when the growth medium is dried, water is sprinkled from the seedlings, and water is sufficiently sprayed until the seedlings ooze from the bottom side. Such watering is preferably performed 2 to 3 times per week. As this water, tap water can be used. As a fertilizer, a nutrient solution having an electric conductivity of 0.2 to 0.35 is sprayed. Examples of such nutrient solutions include commercially available nutrient solutions such as Hyponex Corporation (trade name: Hyponex 6-10-5) and Otsuka Chemical Co., Ltd. (trade name: Otsuka House No. 1, Otsuka). House No. 2) can be used. The nutrient solution is supplied until it oozes from the bottom side of the growth medium. By growing seedlings in which about 2 true leaves are developed in such an atmosphere, it is possible to obtain wasabi seedlings in which 4 to 6 true leaves are developed at a growth rate of almost 100%. Such wasabi seedlings can be planted in wasabi fields and the like.

  In order to grow wasabi seedlings in an artificial facility maintained at a constant temperature in this way, it is possible to grow the wasabi seedlings throughout the year by providing this artificial facility in the vicinity of a wasabi field or the like. For this reason, according to the demand for wasabi seedlings, it is possible to seed the wasabi seeds appropriately. Moreover, since the wasabi seedlings are grown close to the place where the wasabi seedlings are planted, such as wasabi fields, they can be planted in the wasabi fields with the growth medium attached to the roots. It can be improved. In addition, when this artificial facility is formed in a container for carrying goods, it can be easily installed in the vicinity of the wasabi field and the like and where water and electricity supply sources are provided.

  By the way, when a horseradish seed is directly sown in a growth medium in an artificial facility maintained at a constant temperature, the growth rate of the horseradish seedling is about 40 to 50%. On the other hand, the growth rate of wasabi seedlings can be improved by seeding rooted wasabi seeds in a growth medium in which cotyledons are stored in the seed shell and hairy roots are rooted on the young roots. . Such rooted wasabi seeds are sown in one layer on the surface of the moisturizing material in the rooting atmosphere maintained at a predetermined temperature so that adjacent seeds are in contact with each other. Sprinkle the wasabi seeds and moisturizing material to a predetermined humidity. Here, when wasabi seeds sown on the surface of the moisturizing material are overlaid, the roots rooted from the wasabi seeds are entangled with each other, which makes the processing described later difficult. Moreover, as water to spray water, sterilizing water can be used suitably. It is because generation | occurrence | production of mold | fungi etc. can be suppressed. As this sterilizing water, the above-mentioned slightly acidic electrolyzed water (product name: Pure Star Water) manufactured by Morinaga Milk Industry Co., Ltd. can be suitably used. The “watering” includes watering in a sprayed state.

  The moisturizing material may be any material that can retain moisture, and moisturizing paper such as tissue paper can be used. Further, the rooting atmosphere is preferably maintained at a temperature of 15 to 19 ° C. Such a rooting atmosphere is preferably formed in an incubation in which the internal temperature can be maintained at a predetermined temperature, and it is not necessary to irradiate the wasabi seeds with light.

  From the wasabi seeds maintained in the rooting atmosphere in such a state, rooting is observed from most wasabi seeds as shown in FIG. The rooted wasabi seed 10 shown in FIG. 2 is one in which cotyledons are housed in a seed shell 20 and hairy roots 14 and 14 are rooted on a 3 to 7 mm radicle 12. The rooted wasabi seed 10 shown in FIG. 2 is grown from a rooted wasabi seed 10A in which the roots 12 are rooted in the form of dots from cracks formed in the seed shell 20, as shown in FIG. is there. Furthermore, when the rooted wasabi seed 10 shown in FIG. 2 is continuously maintained in the rooting atmosphere, the handle 18 formed following the radicle 12 in which a large number of hairy roots 14 and 14 are formed as shown in FIG. The cotyledons 16, 16 appear from the seed shell 20 at the tip of the seeds and become the germinated seedlings 24 developed.

  As shown in FIG. 2, each of the rooted wasabi seeds 10 in which cotyledons are housed in the seed shell 20 and rooted with hairy roots 14 and 14 are rooted on the 3 to 7 mm radicle 12 is maintained at a constant temperature. Seed the growth medium in an artificial facility. Such rooted wasabi seeds 10 can be handled in the same manner as wasabi seeds. The growth medium sowed with the rooted horseradish seed 10 in this manner is subjected to a predetermined amount of light on the growth medium in an artificial facility maintained at 18 to 20 ° C., as in the case where the wasabi seed is directly seeded on the growth medium. And by supplying water, almost 100% of germinated seedlings 24 (FIG. 1B) can be obtained from the sowing rooted wasabi seeds 10. The germinating seedling 24 further grows into a seedling in which about two true leaves have sprouted. From this young seedling, there is a high possibility of growing into a wasabi seedling that can be planted in a wasabi field or the like. By sowing the rooted wasabi seeds 10 in the growth medium in this manner, the breeding rate of the wasabi seedlings that grow from the rooted wasabi seeds 10 to the wasabi seedlings can be set to 68 to 95%.

  Here, when rooted horseradish seed 10A shown in FIG. 3 in which only the pointed radicle 12 is rooted from seed shell 20 is sown in the growth medium, as shown in FIG. Although the roots 14 and 14 are rooted, the cotyledons do not develop from the seed shell 20 and the growth tends to stop. For this reason, it exists in the tendency which cannot raise the raising rate of a wasabi seedling remarkably.

  As shown in FIG. 4, it is also possible to plant the germinating seedling 24 in which cotyledons 16 and 16 appear from the seed shell 20 and develop them in the growth medium. However, in the germinated seedling 24, the capillary side roots 14 and 14 are rooted on the long root 12 and the cotyledons 16 and 16 are also developed. Or the cotyledons 16 and 16 are easy to get entangled, and it is difficult to separate them into one germinated seedling 24. In particular, when the germinating seedlings 24 are obtained from a large number of wasabi seeds, the roots of the numerous germinating seedlings 24 are intertwined to form a lump, and the separation work for separating the individual germinating seedlings 24 is extremely difficult. . Furthermore, there is also a troublesome work of planting the separated germinated seedlings 24 one by one in the growth medium. Moreover, the variation in the growth rate of the germinated seedlings 24 planted in the growth medium increases. It is estimated that this is because the growing points such as the radicle 12 and the side root 14 are easily damaged during the separation work of the germinated seedling 24.

  Examples of the present invention will be described in detail below, but the scope of the present invention is not limited to these examples.

Example 1
The wasabi seeds of this wasabi that had been ripened and broke out of dormancy were immersed in an aqueous solution to which 100 ppm of gibberellin was added and maintained at 10 to 15 ° C. for 72 hours to give gibberellin treatment. Furthermore, wasabi seeds subjected to gibberellin treatment were washed three times with slightly acidic electrolyzed water (product name: pure star water) manufactured by Morinaga Milk Industry Co., Ltd. having a bactericidal effect. Next, the washed wasabi seeds were laid out in a single layer on a tissue paper as a moisturizing material laid on a petri dish. The wasabi seeds and tissue paper were sprayed with slightly acidic electrolyzed water (product name: Pure Star Water) manufactured by Morinaga Milk Industry Co., Ltd., which has a bactericidal effect, to give moisture. The wasabi seeds were placed in the incubation together with the petri dish, and the incubation inside was maintained at 15 to 19 ° C. for 1 week while maintaining the rooting atmosphere. 75 to 80% of the wasabi seeds shown in FIG. Seed 10 was obtained. In this rooted wasabi seed 10, cotyledons are housed in a seed shell 20, and hairy root-like roots 14 and 14 are rooted on a 3 to 7 mm radicle 12. Moreover, when this holding | maintenance was made into 2 weeks, the rooting wasabi seed 10 was obtained from 89-100% of wasabi seeds. The rooted wasabi seed 10 could be handled in substantially the same manner as the wasabi seed.

  The rooted wasabi seeds 10 shown in FIG. 2 were sown in each of the recesses of the cell tray filled with the commercially available culture soil 22 as a cultivation medium. As such a cell tray, one having 25 concave portions (inner diameter 5 cm × 5 cmm, depth 5 cm) having through holes formed on the bottom surface was used. When sowing rooted wasabi seeds 10 in this recess, one rooted wasabi seed 10 was taken with tweezers on the culture soil 22 filled in each of the recesses of the cell tray to about 80% of its volume. After placing, the soil was thinly covered with the culture soil 22 so that the rooted wasabi seeds 10 were hidden.

Such a cell tray was placed in a container for transporting frozen products, which was provided near a wasabi field and provided with a temperature control device, a water supply device, a fluorescent lamp and a nutrient solution supply device as a light source. . While maintaining the inside of this container in a germination atmosphere of 18 to 20 ° C., white light containing light having a wavelength of 400 to 800 nm was irradiated from a fluorescent lamp to the culture soil 22 of the cell tray. The irradiation time was 12 hours / day, and the amount of light with respect to the surface of the culture soil 22 was adjusted so that the light flux density was 80 to 100 μmol / m ² · s. In addition, tap water was used for water absorption, and it was confirmed that the culture soil 22 began to dry, and water absorption from the bottom surface side of the concave portion of the cell tray was performed. On the 20th to 30th days after placing the cell tray in the container of such an atmosphere, the germinated seedlings 24 in which wasabi cotyledons 16 and 16 were developed on the culture soil 22 from the concave portions of the cell tray were obtained. The expansion of the cotyledons 16 and 16 was recognized in all the concave portions of the cell tray. Furthermore, when the cell tray was placed in the container, the growth to the seedlings in which two true leaves emerged instead of the cotyledons 16 and 16 was observed in all the concave portions of the cell tray.

  When growth was observed in the seedlings with two true leaves in all the concave portions of the cell tray, the tap water was changed to water supply from the seedlings when the culture soil 22 was dried. This water supply was performed until water oozed out from the bottom side of the cell tray. Furthermore, the nutrient solution (Hyponex 6-10-5 (trade name) stock solution diluted by 1500 times) made by Hyponex was fertilized on the culture soil 22. Such fertilization was also performed until the nutrient solution oozed out from the bottom side of the cell tray. When seedlings were grown for about 2 to 2.5 months in such a growing environment, wasabi seedlings with 4 to 6 true leaves were able to be obtained. This wasabi seedling can be planted in a wasabi field or the like. The growth rate from the rooted wasabi seeds 10 sowed in the culture soil 22 in the concave portion of the cell tray to the wasabi seedlings was 68 to 95%. When this wasabi seedling was transported to the wasabi field together with the cell tray, and wasabi seedling was planted in the wasabi field together with the culture soil 22 from the recess of the cell tray, the survival rate of the wasabi seedling was approximately 100% even if the planting time was July.

(Example 2)
In Example 1, wasabi seedlings were grown in the same manner as in Example 1 except that the wasabi seeds subjected to gibberellin treatment were directly sown in the culture soil 22 filled in each recess of the cell tray. The growth rate from wasabi seeds to wasabi seedlings was 30 to 60%. Further, when wasabi seedlings were planted in the wasabi field in the same manner as in Example 1, the survival rate of the wasabi seedlings was approximately 100% even when the planting time was July.
(Example 3)
In Example 1, instead of the rooted wasabi seeds 10 to be sown in the culture soil 22 filled in the concave portions of the cell tray, cotyledons are housed in the seed shell 20 and only the dotted radicles 12 are rooted. Wasabi seedlings were grown in the same manner as in Example 1 except that the rooted wasabi seeds 10A shown in FIG. The growth rate from wasabi seeds to wasabi seedlings was 68 to 75%. Further, when wasabi seedlings were planted in the wasabi field in the same manner as in Example 1, the survival rate of the wasabi seedlings was approximately 100% even when the planting time was July.

(Comparative Example 1)
In Example 1, instead of the rooted wasabi seeds 10 to be sown in the culture soil 22 filled in the recesses of the cell tray, the germination seedling 24 shown in FIG. The one that was grown on was used. In the germinated seedling 24, the radicle 12 grew beyond 7 mm, and the development of the cotyledons 14 and 14 had started. However, a large number of germinated seedlings 24 are agglomerated and their young roots are entangled with each other, and the separation work of the germinated seedlings 24 is extremely difficult. In the separated germinated seedlings 24, there were many ones in which the cotyledons 14, young roots 12, or side roots 14, 14 were cut off. Germinated seedlings 24 that were judged to have been completely separated by observation with the naked eye were planted in the culture soil 22, and wasabi seedlings were grown in the same manner as in Example 1. The growth rate of wasabi seedlings from the planted seedlings 24 was 58 to 85%, and the variation was large. In addition, wasabi seedlings were planted in the wasabi field in the same manner as in Example 1, and the survival rate of wasabi seedlings was approximately 100% even when the planting time was July.

(Comparative Example 2)
When I bought wasabi seedlings grown in a cool place in the high place, the roots of the wasabi seedlings had no soil. When the healthy ones were selected from the purchased wasabi seedlings and planted in the wasabi field, the survival rate of the planted wasabi seedlings varied from 70 to 90%. The wasabi seedling was planted in July.

  According to the present invention, wasabi seeds can be efficiently grown into wasabi seedlings near the place where wasabi seedlings are planted throughout the year, and seedling of wasabi seeds can be performed as appropriate according to the demand for wasabi seedlings.

  10, 10A are rooted wasabi seeds, 12 are young roots, 14 are lateral roots, 16 are cotyledons, 18 are stalks, 20 are shells, 22 are cultured soils, and 24 are germinated seedlings.

Claims (10)

  While supplying water and light that may contain nutrient solution to a growth medium in an artificial facility maintained at a constant temperature, seeding with wasabi seeds, germinating and developing cotyledons, the cotyledons Instead, it grows until 4 to 6 true leaves are developed.   2. The wasabi seedling according to claim 1, wherein the wasabi seeds are in a state in which cotyledons are housed in a seed shell and hairy roots are rooted on a 3-7 mm radicle. Method.   The method for growing a horseradish seedling according to claim 1, wherein the constant temperature is 18 to 20 ° C. The said light containing light with a wavelength of 400-800 nm is supplied from a fluorescent lamp or a light emitting diode, and the light quantity bundle density with respect to the surface of the said culture medium shall be 60-100 micromol / m < ² > * s. To grow Japanese wasabi seedlings.   The method for growing a horseradish seedling according to claim 1, wherein the light is light introduced from natural light.   The method for growing a horseradish seedling according to claim 1, wherein the nutrient solution has an electric conductivity of 0.2 to 0.35.   The wasabi medium according to claim 1, wherein the growth medium is a growth medium selected from soil, sand, small gravel, wood chips, cotton, paper, plastic chips and porous plastic which may contain a culture component. Seedling growing method.   The method for growing a horseradish seedling according to claim 1, wherein the artificial facility is a movable facility.   The method for growing a horseradish seedling according to claim 1, wherein the wasabi seed is immersed in a gibberellin-containing solution and then washed with sterilized water. 4-6 seed leaves instead of germinated cotyledons seeded with wasabi seeds while supplying water and light that may contain nutrient solution to the growth medium in an artificial facility maintained at a constant temperature. Wasabi seedlings that are grown until they are developed.

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