JP5646364B2 - Cultivation method - Google Patents

Description

  The present invention relates to a method for cultivating licorice plants, and more specifically, in a state in which the root portion is squeezed and restrained, the growth of the licorice plant is continued, stress is applied to the root portion, and the root portion is increased. The present invention also relates to a method for cultivating a licorice plant that causes the content of medicinal components such as glycyrrhizin to increase at the same time.

  Conventionally, licorice plants such as Ural licorice are important as raw materials for medicines including Chinese medicine, cosmetics, and food flavoring agents. For example, glycyrrhizin, which is a medicinal component of Ural licorice, has been confirmed to have an effect on SARS virus and hepatitis virus. Furthermore, there is pharmacological evidence that the isoflavonoid glycyrin contained has an effect of improving metabolic syndrome. It has been reported. This Urachis is a plant that grows in dry areas and is difficult to cultivate in Japan, so it relies almost 100% on imports. However, in China, which is a major exporter of Uralcans, the desertification of dry areas has progressed due to overexploitation of wild Uralcanus, which has further strengthened export regulations, reduced yields due to abnormal weather, and reduced the use of pesticides and heavy metals. Residues, etc., make it impossible to stably import Uralphanthus from China.

  Therefore, in Japan, cultivation of Ural licorice has been attempted, but its underground part branches into a number of thin strons (running stems), and the content of glycyrrhizin and glycyrin, which are the above-mentioned medicinal ingredients, does not increase. The growth of the plant becomes dominant, the enlargement of the root of the underground part is damaged, the cultivation period of 4 to 5 years is required for harvesting, and the stron that has been extended at the time of harvest is entangled with the harvesting machine, making the harvesting work difficult I have to. Therefore, it is said that it is difficult to cultivate, harvest and prepare herbal medicines, and it is said that it is impossible to cultivate larva in Japan. Under such circumstances, attempts to cultivate Uralphanthus in Japan have been reported.

  In other words, this cultivation report is an open field cultivation of Ural licorice by direct sowing of seeds, and the seeds of Ural licorice are simply divided, then directly sown in a field in Nayoro City, Hokkaido, germinated, grown as they are, In addition, we collected 2-year-old Urachian elephants and investigated their growth status. In addition, there is one in which germinated seedlings are transplanted and grown in the above-mentioned field, and first-year and second-year larvae are collected and the growth state thereof is investigated (for example, see Non-Patent Document 1).

  In addition, what is called pipe cultivation of so-called Ural licorice has been reported. That is, a cap with a drainage hole is fitted to the lower end of a vinyl chloride pipe with a diameter of 10cm x 1.0m, the culture soil is filled in the pipe, seedlings are planted and grown as they are, and 1st year larva is collected. And the growth situation was investigated. In addition, there is one in which seeds are sown in a culture medium in a pipe, germinated and grown as it is, and an annual larval elephant is collected and the growth state thereof is investigated (for example, see Non-Patent Document 3).

  In addition, there are reports of labor saving using existing agricultural machinery, such as raising seedlings of Uralanthus cell seedlings and planting them with a transplanter (see, for example, Non-Patent Document 2 and Non-Patent Document 5).

  In addition, there is a report of selecting a glycerine species having a high content of glycyrrhizin (see, for example, Non-Patent Document 4 and Non-Patent Document 5).

  In addition, there is a report on a change in glycyrrhizin content due to a difference in site in the main root of Uralphanthus (for example, see Non-Patent Document 6).

  In addition, there is a report that Ural licorice and Spanish licorice were dried in a greenhouse and cultivated using a cylinder (see, for example, Non-Patent Document 7).

“Aiming at domestic cultivation of licorice” Toshiro Shibata, Hokkaido Research Department, Research Institute for Medicinal Plant Resources, National Institute of Biomedical Sciences 3rd symposium on licorice-Toward sustainable domestic cultivation-Abstract of lectures July 2005 ( Nayoro City Cultural Center), pp. 3-7 “Regarding Research on Medicinal Plant Cultivation in Hokkaido Research Department” Toshiro Shibata Medicinal Plant Forum 2010, Medicinal Plant Research Center, Medicinal Plant Resource Research Center, National Institute of Biomedical Science 2010 2010pp25-30 "Aiming at domestic cultivation of licorice (1) About tuber cultivation of licorice" Kazuo Ozaki, Makio Shibano, Genjiro Kusano, Hitoshi Watanabe, Takeda Pharmaceutical Company Limited, Kyoto Pharmaceutical Botanical Garden, Osaka Pharmaceutical University, Biopharmaceutical Journal 64 (2 ), 76-82 (2010) “Toward domestic cultivation of licorice (2) Selection of excellent licorice (Glycyrrhiza uralensis Fisher)” Kazuo Ozaki, Makio Shibano, Genjiro Kusano, Hitoshi Watanabe Takeda Pharmaceutical Company Limited, Kyoto Pharmaceutical Botanical Garden, Osaka Pharmaceutical University Magazine 61 (2), 89-92 (2007) “Regarding cultivation of licorice” Shigeki Hayashi, Research Center for Medicinal Plant Resources, Research Center for Medicinal Plants, National Institute of Biomedical Sciences 2010 Medicinal Plant Forum 2010 Abstracts 2010 pp37-40 “Study on chemical quality assessment of cultivated licorice” Maki Shibano, Kazuo Ozaki Medicinal plant cultivation research 32 (2) 2010 pp3-8 “Cylinder cultivation of licorice Glycyrrhiza uralensis Fisher / G.glabra 1” Akinobu Sueoka, Tatsufumi Yoshioka, Miho Sakai, Genjiro Kusano, Makio Shiba Medicinal Plant Research 32 (2) 2010 pp28-38

  The above Non-Patent Documents 1, 2 and 5 show that Hokkaido Nayoro City, an open-air cultivation area, is a dry zone, and that it is not affected by the rainy season in the south of Honshu. Strons and the like branch from the roots and rhizomes, which makes it difficult to harvest and prepare herbal medicines. Furthermore, the glycyrrhizin content, which is a slow-growing and medicinal active ingredient, is not less than 2.5%, which is the standard value of the Japanese pharmacopoeia for the herbal medicine “Liquefolia”, and the thickness of the root and underground stem is not less than 0.5 cm. There is a disadvantage in terms of time, which takes two to three years.

  In Non-Patent Document 3, tube cultivation is performed in Kyoto Prefecture, which is affected by the rainy season. However, since it is tube cultivation, strons and the like are difficult to branch from the roots and underground stems of Ural licorice. However, the content of glycyrrhizin, which is a medicinal active ingredient, tends to be slow due to the influence of humidity, temperature, and rainfall, and is 2.5%, the standard value of the Japanese pharmacopoeia for the herbal medicine “Liquefoli” As described above, it takes two to three years for the root part and the rhizome part to be 0.5 cm or more in thickness, which is difficult in terms of production cost.

  And, as already mentioned, licorice plants such as Ural licorice are originally plants that grow naturally in the desert area, so it is difficult to cultivate ordinary outdoor fields in Japan where there is a rainy season. However, since the growth of Stron becomes dominant and the growth of roots is delayed, it takes years until harvesting is possible. In order to avoid this rainy season, when licorice plants are cultivated in a house, the occurrence of pests (aphids, spider mites, slips), which are often a problem in house cultivation, frequently occurs.

  According to the knowledge of the present inventors, tube cultivation in a house is not affected by the weather and is suitable for cultivation of licorice plants, but it requires a large amount of money for the construction of the house. Even if there is a disadvantage that requires manual labor, it is effective in that the root which is the standard value of the Japanese Pharmacopoeia can exceed the standard value of thickness of 0.5 cm or more in a short period of time. And to make the glycyrrhizin content, which is a medicinal component of the licorice plant, 2.5% or more, which is the standard value of the Japanese pharmacopoeia of the herbal medicine "Liquefolia", a lot of glycyrrhizin is contained in the root at the time of harvest It is desirable, however, the applicant of the present invention is located on the tip side from the place where the restriction is applied, when the restriction is continuously applied to the root of the genus plant, compared to the case where the restriction is not applied. It has been confirmed that many side roots occur in the root (main root), and the glycyrrhizin content in the root increases dramatically.

  Therefore, the object of the present invention is not easily influenced by the weather, the root that is the standard value of the Japanese Pharmacopoeia in a short period exceeds the standard value of the thickness of 0.5 cm or more, and the glycyrrhizin content is 2.5% or more. It is an object of the present invention to provide a method for cultivating a licorice plant excellent in cost performance, which is easy to produce, has a low initial cost, and is easy to process after harvesting and collection.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, a licorice plant is planted in a field that has created a dry environment suitable for a licorice plant by controlling rainfall and groundwater and permeated water due to rainfall, and the root of the licorice plant is preliminarily formed. Or the restriction of restriction by the restriction mechanism during the growth process, and the growth of the licorice genus plant is continued in the dry environment creation field in that state, and the root (main root) is continuously stressed and the restriction is applied. There is provided a method for cultivating a licorice plant, characterized in that a large number of side roots are generated at the root located on the tip side from the root, and the content of medicinal components such as glycyrrhizin is increased at the root.

  Further, according to the present invention, the dry environment creation field is a field of the above-mentioned licorice plant that is formed by embanking an open field to a predetermined height to form a ridge and covering the ridge with a sheet that does not allow water to pass through. A cultivation method is provided.

  Moreover, according to this invention, the cultivation environment of the said licorice plant which is the said dry environment creation field is a field in a house is provided.

  Further, according to the present invention, the restriction restraining mechanism opens one or more holes in the plate, and restricts the restriction through the roots of the genus plants in advance or in the growth process in the one or more holes. A method for cultivating the above licorice plant is provided.

  Moreover, according to this invention, the cultivation method of the licorice genus plant which attaches a restraining tool beforehand to the root part of the said licorice genus plant, and carries out a squeeze restraint is provided.

  In addition, according to the present invention, a licorice plant is planted in a field that has created a dry environment suitable for a licorice plant by controlling rainfall and groundwater and permeated water due to rainfall, and grows at the root of the licorice plant. In the process, the restriction of restriction by the hole of 1 is applied, and in this state, the growth of the licorice plant is continued in the dry environment creation field, stress is applied to the root (main root), and the side root is branched from the root. And a method for cultivating licorice plants characterized in that the content of medicinal components such as glycyrrhizin is increased in the lateral root.

  Further, according to the present invention, the restriction restraining mechanism by the 1 hole is a seedling cultivation container having 1 drainage hole, and the root part of the genus plant is passed through the 1 drainage hole in advance or in the process of growth, There is provided a method for cultivating a licorice plant that is restricted by drawing.

  The operation of the first problem solving means is as follows. In other words, if the root of a licorice plant planted in a field that has created a dry environment is grown in a restricted state and stress is applied to the root, the cause is unknown, but the tip is closer to the tip than the restricted part. There is a merit that the glycyrrhizin content of the root (side root) located is higher than the glycyrrhizin content of the root (main root) located on the proximal end side from the restriction position.

  The effect of the second problem solving means is that the infiltration of rainfall is controlled by the sheet, and the influence of the infiltration water by the groundwater and the rain is diminished by controlling the groundwater by the high ridge that has been embanked at a predetermined height. This is a field where a dry environment has been created.

  The action of the third problem solving means is that the rain is completely suppressed by the house, and the influence of the groundwater and the permeated water due to the rain is diminished by the dredged earth filled with the predetermined height, so that the soil in the house has a dry environment. It becomes a created field.

  The action of the fourth problem-solving means can realize the restriction of root restriction by passing the root part of a genus plant through one or more holes in the plate.

  The effect | action by the said 5th problem-solving means can implement | achieve the restriction | limiting of a root | strict part by mounting | wearing a restraint tool with the root part of a licorice plant.

  The effect of the sixth problem solving means is that the root of a licorice plant planted in a field that has created a dry environment is grown in a state of being constricted by a single hole, and the root is stressed. Is unknown, but many side roots are derived from the root portion (main root) located on the tip side of the restriction restraint site and branch, and the glycyrrhizin content of those side roots is more distal than the restriction restriction site due to one hole. And there exists a merit that it increases rather than the glycyrrhizin content of the root part located in the base end side.

  According to the seventh problem solving means, the root part of the licorice plant planted in the cultivation container for raising seedlings grows and passes through one drainage hole, or the root part branched from the root part also has one drainage hole. Through this, the restriction is restricted by one hole, and many side roots are induced from the root located on the tip side from the restriction restriction part, and can branch and grow.

  The method for cultivating the licorice plant of the present invention is not easily affected by the weather, the root of the Japanese Pharmacopoeia standard value in a short period exceeds the standard value of 0.5 cm or more in thickness, and the glycyrrhizin content is 2. It becomes easy to make it 5% or more, and there is an effect that a licorice plant excellent in cost performance can be obtained.

  Moreover, the cultivation method of the licorice genus plant of this invention has the effect that the field of the dry environment excellent in cost performance can be created with the sheet | seat and the paddy with embankment in addition to said effect.

  Moreover, in addition to said effect, the cultivation method of the licorice plant of this invention has the effect which can create the perfect dry environment by a house.

  Moreover, the cultivation method of the licorice plant of this invention has an effect which can implement | achieve the restriction | limiting of a root | root part very easily by one or more holes opened to the board in addition to said effect.

  Moreover, in addition to said effect, the cultivation method of the licorice plant of this invention has an effect which can implement | achieve the restriction | limiting of a root part very easily with a restraint tool.

  In addition, the method for cultivating the licorice plant of the present invention is less affected by the weather even when the restriction of squeezing by 1 hole is applied during the growth process, and the root which is the standard value of Japanese Pharmacopoeia in a short period of time is 0.5 cm. There is an effect that a licorice plant excellent in cost performance can be obtained because the thickness exceeds the thickness reference value and the glycyrrhizin content is easily increased to 2.5% or more.

  Moreover, in addition to said effect, the cultivation method of the licorice plant of this invention has an effect which can obtain a licorice plant with much glycyrrhizin content also by the cultivation container for raising seedlings.

It is sectional drawing which shows the state which is growing the licorice genus plant in the cylinder for cultivation assistance standing up in the fence of embodiment of this invention method. It is a top view of the state which covered the sheet | seat on the bag of embodiment of this invention method. It is sectional drawing which shows the state which is growing the licorice plant in the cylinder for cultivation assistance standing up in the house of embodiment of this invention method. It is a top view of the bottom face cap fitted in the cylinder for cultivation assistance of the embodiment of the method of the present invention. It is a top view of the other bottom face cap fitted in the cylinder for cultivation assistance of embodiment of this invention method. It is sectional drawing which shows the state which is growing the licorice plant which attached | subjected the net-like restraint tool to the root part in the cocoon of embodiment of this invention method. FIG. 7 is a cross-sectional view showing a state after a licorice plant with a mesh-like restraint attached to the root of FIG. 6 grows. It is sectional drawing which shows the state which is growing the licorice plant in the cultivation container for raising seedlings erected in the straw of embodiment of this invention method.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below with reference to the drawings.

  In the drawings, the method for cultivating the licorice plant of the present invention is a field 1 (hereinafter simply referred to as “dry environment creation field”) in which a dry environment adapted to the licorice genus plant is created by controlling the amount of rain and infiltration water due to groundwater or rainfall. ) Planted with a licorice plant 2, and the root portion 3 of this licorice plant 2 is subjected to restriction restriction by the restriction restriction mechanism 4 in advance or in the process of growth, and in this state the growth of the licorice plant 2 is created in a dry environment. In the field 1, the root part 3 is continuously stressed, and the root part 3 is increased in the content of medicinal components such as glycyrrhizin.

  The dry environment creation field 1 is not particularly limited as long as the dry environment creation field 1 is a field that creates a dry environment suitable for a licorice plant. For example, water is added to the ridge 10 formed by embedding soil in an open field at a predetermined height. There is one that covers a sheet 11 that does not pass therethrough. Since this ridge 10 suppresses the influence of the groundwater level in the field in the open field, an appropriate height, for example, about 250 mm to 500 mm is required. Further, in order to suppress the influence of moisture due to weather conditions such as rain and snow, the bag 10 is covered with a sheet 11 that does not allow water to pass through. As shown in FIG. An installation hole 12 for planting the genus plant 2 is opened. In addition, since this sheet | seat 11 is directly exposed to sunlight, rain, snow, etc., the thing of the material excellent in the weather resistance is used.

  Further, for example, as shown in FIG. 3, the dry environment creation field 1 has a house 13 in an open field, and the house 13 allows the outdoor temperature, amount of sunlight, wind speed, and moisture to be controlled. The environment creation field 1A may be used. According to this dry environment creation field 1A, although the initial cost is increased because the house 13 is built, the outdoor temperature, sunshine amount, wind speed and moisture are finely controlled according to the type of licorice plant 2 that is actually cultivated. It can be done and it will be convenient.

  The squeezing restraint mechanism 4 is not particularly limited as long as it squeezes the root part 3 of the licorice plant 2 in advance or in the process of growth. For example, the squeezing restraint mechanism 4 is filled with a culture soil 14 containing a sufficient amount of nutrients. You may comprise by the cylinder 17 for cultivation assistance of the diameter 30mm thru | or 200mm x length 100mm thru | or 300mm which opened the 1 or more hole 16 in the part 15. FIG. That is, this restriction restraining mechanism 4 is for installation in which seeds or seedlings of the licorice plant 2 are planted in the culture soil 14 in the cultivation assistance cylinder 17 and the cultivation assistance cylinder 17 in that state is opened in the sheet 11. The root portion 3 grows up and grows through one or more holes 16 in the bottom plate portion 15 through the holes 12, and the root portion 3 is eventually restricted by the one or more holes 16. It is what I did. In addition, the root part 3 of the licorice plant 2 may be passed through one or more holes 16 of the cultivation assistance cylinder 17 in advance, and squeezing restriction may be applied from the beginning.

  As described above, the cultivation auxiliary cylinder 17 is preferably 30 mm to 200 mm in diameter and 100 mm to 300 mm in length, but in accordance with the characteristics of the licorice plant 2 to be actually cultivated, the diameter x The length is decided. This cultivation-assisting cylinder 17 has a smooth growth in the vertical direction of the root part 3 in the licorice plant 2 and the horizontal direction of the stron 18 in addition to the restriction restriction function by one or more holes 16 opened in the bottom plate part 15. Since the growth can be suppressed, and the growth of the stron 18 is suppressed, the root portion 3 of the licorice plant 2 interfering with the inside and outside of the cultivation assistance cylinder 17 is also cultivated sufficiently.

  In addition, the diaphragm restraining mechanism 4 suffices if one or more holes 16 are formed in the bottom plate portion 15 of the cultivation assistance cylinder 17, but as shown in FIG. 4, the bottom plate portion 15 has a diameter of 5 mm or less. The bottom cap 20 has a plurality of small-diameter holes 16a each having a diameter of 10 mm. The bottom cap 20 may be detachably fitted to the bottom of the cultivation assistance cylinder 17. These small-diameter holes 16a adjust and maintain the moisture value of the culture soil 14 in the cultivation assistance cylinder 17, and the root part (main root) 3 of the licorice plant 2 grows in the cultivation assistance cylinder 17, After the tip portion 3a hits the bottom cap 20, the side root 21 branches from the root portion (main root) 3 and expands due to stress caused by expansion, enlargement, and squeezing through the small-diameter hole 16a, and the root portion (main root). 3 and the side root 21 absorb the water | moisture content and nutrient of the soil in the cocoon 10, and make it enlarge more. Therefore, the diameter and number of the small-diameter holes 16a of the bottom cap 20 are important, and are finally determined in light of empirical rules depending on the type of licorice plant 2 that is actually cultivated. In addition, the material of the cylinder 17 for cultivation assistance and its bottom face cap 20 does not have limitation in particular, However, The product made from paper, plastics, such as a polyvinyl chloride and polyethylene, is common from a price surface and the ease of acquisition. In addition, the said restriction | limiting restriction | limiting mechanism 4 does not have the cylinder 17 for cultivation assistance, and is good also as use of only the bottom face cap 20. FIG.

  Further, as shown in FIG. 5, the above-described bottom cap 20 has one medium-diameter hole 22 having a diameter of 15 mm to 30 mm formed in the center, and a small-diameter hole having a diameter of 3 mm to 7 mm around the medium-diameter hole 22. The bottom cap 20A may be replaced with a plurality of bottom caps 16b. And this bottom face cap 20A is fitted in the state which can be attached or detached to the bottom part of the cylinder 17 for cultivation assistance. One medium-diameter hole 22 and a plurality of small-diameter holes 16 b adjust and maintain the moisture value of the culture soil 14 in the cultivation assistance cylinder 17, and the root part 3 of the licorice plant 2 is located in the cultivation assistance cylinder 17. Grows and the tip 3a of the main root 3 passes through and extends through one medium-diameter hole 22 without hitting the bottom cap 20A, absorbs moisture and nutrients in the soil in the cocoon 10, and the main root 3 is In the state where the diaphragm is restrained by the medium diameter hole 22, it is enlarged.

  On the other hand, when the tip 3a of the other narrow root (main root) 3 hits the bottom cap 20A, the side root 21 branches from the tip 3a and extends through the plurality of small diameter holes 16b around the medium diameter hole 22, Moisture and nutrients in the soil in the cocoon 10 are absorbed, and the side roots 21 inside and outside the cultivation support cylinder 17 are squeezed and restrained by a plurality of small diameter holes 16b, and are further enlarged. In addition, the said restriction | limiting restriction | limiting mechanism 4 does not have the cylinder 17 for cultivation assistance, and is good also as use of only the bottom face cap 20A. Whether to use the bottom cap 20A or the bottom cap 20 is finally determined in light of empirical rules depending on the type of licorice plant 2 to be actually cultivated.

Moreover, the said restriction | limiting restriction | limiting mechanism 4 may restrict | squeeze and restrict | limit the root part 3 by mounting | wearing with the restraint tool 23 beforehand, for example, as shown in FIG. That is, a restraint 23 is attached to the root 3 of the licorice plant 2 in advance, planted and grown in the dry environment creation field 1, for example, the cocoon 10, and squeezed and restrained by the restraint 23, and further enlarged. May be.
Moreover, you may use a mesh-like object as a restraint tool. The size of the mesh is not particularly limited, but a mesh of about 4 mm to 7 mm is preferably used.

  The culture soil 14 determines its kind and particle size in accordance with the characteristics of the licorice plant 2 that is actually cultivated. The grain size of the culture soil 14 is preferably 5 mm or less, and the lower limit is preferably about 1 mm in consideration of economy. Thus, by making the particle size of the culture soil 14 5 mm or less, the root part 3 of the genus plant 2 is along the side wall 17a of the cultivation auxiliary cylinder 17 without being affected by the lump of the culture soil 14 or the like. Can grow in a straight line. Further, when the cultivation soil 14 is filled in the cultivation auxiliary cylinder 17, fertilizer or lime is added in accordance with the characteristics of the licorice plant 2 to be cultivated, and the pH is in the range of 5.5 to 6.8. Adjust so that it contains enough nutrients.

  The licorice plant 2 mainly uses the root part 3, for example, G. glabra, G. uralensis, G. inflata, G. aspera, G. korshinkyi, G. eurycarpa, etc. G. glabra and G. uralensis, which are particularly effective. All of the above-exemplified licorice plants 2 are familiar with the cultivation method described above, but the licorice plant to be actually cultivated, such as the length of the cultivation assistance cylinder 17, the shape of the plurality of holes in the bottom plate, culture soil, fertilizer, etc. Depending on the type of 2, there is a need to change slightly.

Next, with reference to drawings, the cultivation method of the licorice plant which becomes the said structure is demonstrated.
First, the licorice plant 2 to be cultivated from the above-mentioned licorice plant is selected, and the dry environment creation field 1 or 1A and the restriction restraining mechanism 4 suitable for the licorice plant 2 are selected. When the dry environment creation field 1 is selected, a sheet 11 that does not allow water to pass is put on a ridge 10 formed by embedding the soil of an open field at a predetermined height, and the licorice plant 2 is planted on the sheet 11. For example, when a dry environment creation field 1A is selected, a house 13 may be built in an open field field.

  And when the dry environment creation field 1 is selected, and further when the cultivation assistance cylinder 17 and the bottom cap 20 or 20A in the restriction restraining mechanism 4 are selected, the bottom cap 20 is formed at the lower end of the cultivation assistance cylinder 17. Alternatively, 20A is fitted and the selected licorice plant 2 is mixed in the cultivation assistance cylinder 17 with a mixture of culture soil 14, fertilizer, lime and the like having suitable particle sizes. Thereafter, seedlings of the licorice plant 2 are planted or sown in the cultivation auxiliary cylinder 17. The cultivation-assist cylinder 17 in this state is erected through the installation hole 12 in the basket 10 of the dry environment creation field 1.

  In this cultivation method, it is impossible to completely control the amount of sunlight and the amount of rainwater entering from the cultivation auxiliary cylinder 17 and the installation hole 12, but rainwater falling on the ridge 10 is excluded by the sheet 11 and is further exposed to the ground. The influence of the groundwater in the vineyard and the infiltration water due to rainfall is suppressed by the fence 10 having a predetermined height, so that a dry environment that is well suited to the selected licorice plant 2 is created. In addition, the rainwater that has entered from the above-described cultivation assistance cylinder 17 or the installation hole 12 conversely controls the moisture value in the inside thereof, and the growth environment of the licorice plant 2 is adjusted. .

  Therefore, the licorice plant 2 grows smoothly as a whole, and the root portion 3 in the cultivation auxiliary cylinder 17 also grows smoothly in a straight and vertical direction with few branches along the side wall 17a. At the same time, the stron 18 grows in the horizontal direction but is suppressed by the side wall 17a. By suppressing the stron 18, the growth of the root 3 is promoted, and eventually the tip of the root 3 hits the bottom cap 20 of the cultivation cylinder 17, extends through the small-diameter hole 16 a, and moisture in the soil in the basket 10. Absorbs nutrients and enlarges them. The enlarged root portion (main root) 3 is constricted and restrained by the small-diameter hole 16a of the bottom cap 20, and a large number of side roots 21 are generated on the tip side of the restraining portion due to the stress. The root portion 3 and the side root 21 extend inside the cocoon 10 and absorb the moisture and nutrients of the soil in the cocoon 10 to enlarge.

  Further, in the case of the bottom cap 20A, since there are the medium-diameter hole 22 and the small-diameter hole 16b, the distal end portion 3a of the main root portion 3 extends through the medium-diameter hole 22 and absorbs moisture and nutrients in the soil in the basket 10. As a result, the tip 3a of the subordinate root portion 3 extends through the medium-diameter hole 22 or the small-diameter hole 16a and absorbs moisture and nutrients in the soil in the cocoon 10 to enlarge. The enlarged root portion (main root) 3 is constrained by the medium-diameter hole 22 or the small-diameter hole 16a of the bottom cap 20A, and a large number of side roots 21 are generated on the tip side from the constraining portion due to the stress. The main root 3 and the side root 21 extend inside the cocoon 10 and absorb the moisture and nutrients of the soil in the cocoon 10 to enlarge them.

  Six to ten months have passed since the start of cultivation of the licorice plant 2, and the root portion 3 and the fine root 21 inside and outside the cultivation auxiliary cylinder 17 are sufficiently enlarged, and restriction restriction is continued by the bottom caps 20, 20A in the restriction restriction mechanism 4. As a result, stress is continuously applied to the root 3 and the side root 21, and the content of medicinal components such as glycyrrhizin is sufficiently increased in the root (main root) 3 and the side root 21. Thereafter, the licorice plant 2 is pulled out from the cocoon 10 together with the cultivation support cylinder 17 and, further, the stron 18 from the cultivation assistance cylinder 17 does not extend to the cocoon 10 and is easily harvested. . The harvested licorice plant 2 is separated from the enlarged root portion 3 and side root 21 and is commercialized through processes such as drying and preparation. Further, the enlarged root portion 3 and the side root 21 of the genus plant 2 have a smooth skin, and high quality licorice can be obtained by washing with water and removing the earth and sand.

  Further, when a mesh-like restraint 23 is selected as the restriction restraint mechanism 4, the restraint 23 is directly attached to the root part 3 of the selected genus genus plant 2 that has grown to some extent, and the licorice in this state The genus plant 2 is planted through the hole 12 for installation in the basket 10 of the dry environment creation field 1. Also in this case, the root part (main root) 3 and the side root 21 are sufficiently enlarged, and the restricting tool 23 continues to restrict the drawing, so that the root part (main root) 3 and the side root 21 are continuously stressed. And the content of medicinal components such as glycyrrhizin is sufficiently increased in the lateral root 21. The licorice plant 2 is then harvested from the straw 10. The harvested licorice plant 2 is separated from the enlarged root portion 3 and side root 21 and is commercialized through processes such as drying and preparation.

  In addition, when the dry environment creation field 1A is selected, the house 13 is built in the field in the open field, and the licorice plant 2 having the above-described restriction restraint mechanism 4 is planted in the field in the house 13, so the dry environment creation field Compared to 1, the outdoor temperature, amount of sunlight, wind speed and moisture can be finely controlled in accordance with the type of licorice plant 2 that is actually cultivated, which is more convenient. In addition, since the cultivation condition of the licorice genus plant 2 in the dry environment creation field 1A is substantially the same as that of the dry environment creation field 1, reference numerals are attached to the drawings, and detailed description thereof is omitted.

The cultivation method of the licorice plant of the present invention may be as follows.
That is, the method for cultivating licorice plants is to plant the licorice plant 2 in the dry environment creation field 1 or 1A, which is controlled by the vinyl sheet and the high salmon and is suitable for the licorice plant. Thus, the root part 3 of the licorice plant 2 is subjected to squeezing restraint by the restriction restraining mechanism 4A having 1 hole in the process of growth, and the growth of the licorice plant 2 is continued in the dry environment creation field 1 or 1A in that state. Thus, pressure stress is continuously applied to the root portion 3, and the side root 30 is induced to branch from the root portion (main root) 3, and the content of medicinal components such as glycyrrhizin is increased in the side root 30.

  The restriction mechanism 4A described above is not particularly limited as long as the restriction part 4 can be restricted by one hole in the process of growing the root part 3 of the genus plant 2, for example, for raising seedlings having one drain hole 31. In the cultivation container 32, the root restriction 3 of the licorice plant 2 is passed through the drainage hole 31 of 1 in advance or in the process of growth, and restricted. The seedling cultivation container 32 may be a seedling polyethylene pot (hereinafter, simply referred to as “nursery seedling pot 32”). The seedling pot 32 is filled with a mixture of culture soil 14 having a particle size suitable for the selected licorice plant 2, fertilizer, lime and the like. Thereafter, seedlings of the licorice plant 2 are planted or seeded in the seedling pot 32. The seedling pot 32 in this state is partially embedded in the basket 10 of the dry environment creation field 1 through the installation hole 12, or partially embedded in the field in the house 13 in the dry environment creation field 1A.

  In the seedling pot 32 in the dry environment creation field 1 or 1A, the licorice plant 2 grows steadily as a whole, and its root 3 is also straight along the side wall 32a and smooth in the vertical direction with few branches. To grow. Eventually, the tip 3a reaches the bottom of the pot 32 for raising seedlings. Since there is a drain hole 31 in the center, the tip 3a of the main root 3 passes through and extends, and the tip 3b of the subordinate root 3 Also extends through the drainage hole 31, and similarly absorbs moisture and nutrients in the soil in the ridge 10 or the house 13 to enlarge. In this process, the leading end 3a and the leading end 3b of the main and subordinate root 3 are constricted by the drainage hole 31 as the constricting restraint mechanism 4A and continue to be stressed. 30 will be derived a lot. Although the cause of this highly-derived side root 30 is unknown, it has a higher content of medicinal components such as glycyrrhizin than other parts. Since other cultivation conditions are substantially the same as Example 1, the code | symbol is attached | subjected to drawing and the detailed description is abbreviate | omitted.

Next, since the superiority of the cultivation method of the licorice plant which becomes the above-mentioned composition was proved, the situation is explained.
<Test Example 1>
Test site: In Nishihata field in Iwakuni, Yamaguchi Prefecture, a bottom cap (medium hole 20 mm × 1, small hole 5 mm × 12) is attached to a cultivation support cylinder made of vinyl chloride of diameter 100 mm × length 150 mm. The cultivation auxiliary cylinder is filled with the fertilizer and lime adjusted to the culture soil, and it is erected on a straw covered with a waterproof sheet at a height of 300 mm, and the cultivation auxiliary cylinder is Ural Licorice seedlings were planted and cultivated for 193 days from April 6, 2010 to October 15, 2010. The weight (g) of each part of the Ural licorice from which the culture soil immediately after harvesting and the soil of straw was dropped was measured. In addition, each weight measurement site | part of Uralphanthus is three sites, a root head + stron, a root part above a bottom cap, and a root part below a bottom cap. Furthermore, the content (%) of glycyrrhizin (GL) in the root portion above the bottom cap and the root portion below the bottom cap is also measured. The number of cultivation is 9 cases.

<Control Example 1>
Except not using the cultivation assistance cylinder, the larva was grown under the same conditions as in Test Example 1, and the weight of each part and the content (%) of glycyrrhizin (GL) were measured. In addition, the number of cultivation is 5 examples.

<Test Example 2>
Under the same conditions as in Test Example 1 except that a polyethylene pot having a diameter of 100 mm and a length of 110 mm is used instead of the cultivation-assist cylinder, the larva is cultivated, the weight of each part is measured, and polyethylene The content (%) of glycyrrhizin (GL) in the root outside the pot and the side root from the external root was measured. In addition, the number of cultivation is two examples.
The results are shown in Table 1.

Further, the content (%) of glycyrrhizin (GL) in the main roots and lateral roots of Uralphanthus obtained in Test Example 2 was measured, and the results are shown in Table 2. The number of cultivation is 4 cases.

  As shown in Table 1, the content (%) of glycyrrhizin (GL) in the lower root part of the licorice plant in Test Example 1 harvested by the cultivation method of the licorice plant of the present invention is higher than that in Control Example 1. It was a lot. In addition, the content (%) of glycyrrhizin (GL) in the external root part of the licorice plant in Test Example 2 tended to be higher than that in Control Example 1, and further, the external root of the licorice plant in Test Example 2 The content (%) of glycyrrhizin (GL) was much higher than that in Control Example 1. In addition, in comparison between the main root and the side root, it is worth noting that a large amount of glycyrrhizin is contained in the side root portion rather than the main root.

  As mentioned above, although embodiment of this invention was described, it should be understood that a specific structure is not limited to this, and the change in the range which does not deviate from the summary of this invention is possible suitably.

  The method for cultivating the licorice plant of the present invention is not easily affected by the weather, the root of the Japanese Pharmacopoeia standard value in a short period exceeds the standard value of 0.5 cm or more in thickness, and the glycyrrhizin content is 2. When it is desired to obtain a licorice plant with excellent cost performance that is easy to increase to 5% or more, has a low initial cost, and is easy to process after harvesting and collection, it has extremely high applicability.

1 Field for creating dry environment 2 Licorice plant 3 Root (main root)
3a, 3b Tip portion 4, 4A Restriction restricting mechanism 10 畝 11 Sheet 12 Installation hole 13 House 14 Culture soil 15 Bottom plate portion 16 One or more holes 16a, 16b Small diameter hole 17 Cultivation auxiliary cylinder 17a, 32a Side wall 18 Stron 20 , 20A Bottom cap 21 Side root 22 Medium-diameter hole 23 Restraint (mesh)
30 Side roots 31 Drainage holes 32 Cultivation container for raising seedlings (Polyethylene pot)

Claims (1)

To control the seepage water due to rainfall and underground water and rainfall in the field that created a dry environment suitable for the Glycyrrhiza plant, it will planting Glycyrrhiza plant, in the mesh-like restraint, in a mesh in advance or in the course of growth The licorice plant is squeezed through the main root of the licorice plant , and in that state, the growth of the licorice plant is continued in the dry environment creation field, and the main root is continuously stressed. A method for cultivating a licorice plant, characterized in that the root root is induced to branch and the content of medicinal components such as glycyrrhizin is increased in the main root and the side root.