JP2019041759A - Nursery pot - Google Patents

Abstract

To provide nursery pots with culture soil that can be buried in the soil as it is and can be miniaturized, at the time of transplantation.SOLUTION: A nursery pot 10 comprises a culture soil 20 and a packaging bag 15 in which the culture soil 20 is wrapped and contained, in the nursery pot 10 that becomes a culture soil where a plant seedling 5 grows for a predetermined period of time, the nursery pot 10 having an approximately cylindrical shape compressed at least in longitudinal direction, the compressed culture soil 20 having compression and recovery properties that expand due to water absorption, and the packaging bag 15 being formed from a biodegradable thermal adhesive sheet 18 having biodegradation and thermal adhesiveness.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a nursery pot for growing seedlings of plants for a predetermined period.

  Conventionally, a large number of nursery pots have been provided. For example, the following Patent Literatures 1 and 2 disclose a nursery pot (seedling culture medium) in which a culture soil is accommodated in a container.

Japanese Patent Application Laid-Open No. 2000-232821 Unexamined-Japanese-Patent No. 11-332391

  By the way, in the raising seedling pot disclosed in Patent Document 2 described above, the container is made of polyurethane raw material, and when the seedling is filled in the soil together with the raising seedling pot, fragments of the container and the container remain in the soil. When transplanting, it is necessary to take out seedlings one by one from the nursery pot, and it takes time and labor for transplanting to fields after nursery.

  In addition, since the nursery pots disclosed in Patent Literatures 1 and 2 are nursery pots with a culture soil that functions as a culture medium, the size of each nursery pot is large, and transportation costs, storage costs, and the like are required.

  The present invention has been made in view of such problems, and it is an object of the present invention to provide a nursery pot with a culture soil which can be buried as it is at the time of transplantation and which can be miniaturized.

  A nursery pot according to the present invention for solving the above problems comprises a cultivating soil and a packaging bag which encloses and accommodates the culture soil, and the nursery pot is a culture medium for growing a plant seedling for a predetermined period of time. Is a substantially cylindrical shape compressed at least in the longitudinal direction, and the compressed soil has a compression recovery property that expands due to water absorption, and the packaging bag is a biodegradation having biodegradability and heat fusion property. -It is characterized by being formed from a heat-fusion sheet.

  According to the nursery pot according to the present invention, a biodegradable and heat fusible sheet is adopted as a packaging bag for storing the culture soil, and it can be buried in the soil as it is at the time of transplantation, and at least compressed in the longitudinal direction. To reduce the transportation cost and storage cost.

FIG. 1 is a perspective view of a nursery pot according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a nursery pot according to an embodiment of the present invention. FIG. 3: is a schematic diagram which shows roughly the manufacturing process of the nursery seedling pot which concerns on embodiment of this invention. FIG. 4 is a view showing a partial configuration of a press according to an embodiment of the present invention. FIG. 5 is a view showing a use mode of the nursery pot according to the embodiment of the present invention. FIG. 6 is a perspective view of a nursery pot according to a modification of the embodiment of the present invention. FIG. 7 is a cross-sectional view of a nursery pot according to a modification of the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a nursery pot that functions as a culture medium is described, in which regenerated coconut shell fiber pieces obtained by reclaiming used coconut shell fibers are used as a culture soil. FIG. 1 is a perspective view of a nursery pot according to the present embodiment. FIG. 2 is a cross-sectional view of the nursery pot according to the present embodiment.

  The nursery pot 10 includes a packaging bag 15 and a culture medium 20 housed inside the packaging bag 15, and has a substantially cylindrical shape with a diameter of about 45 mm and a height of about 10 mm as a whole. About 4/5 lower side of the nursery seedling pot 10 is a truncated cone-shaped frustum part 28 which spreads toward a lower surface, and the side is an inclined surface. The diameter of the upper end of the truncated cone 28 is about 45 mm and the diameter of the lower end is about 47 mm.

  Although the details will be described later, the nursery pot 10 is manufactured by compressing only in the vertical direction with a press after putting the culture soil 20 in the packaging bag 15. Thus, when the seedling pot 10 compressed in the longitudinal direction is immersed in water, it absorbs water, expands in the longitudinal direction, and can be restored to the shape before compression.

  A recess 25 is formed at the center of the upper surface of the nursery pot 10. The recess 25 is in the shape of an inverted truncated cone, and the diameter of the upper end opening is about 12 mm, the diameter of the lower end bottom is about 10 mm, and the height is about 2 mm. This recess 25 is used as a place for placing seeds or placing roots of seedlings in order to allow the seedlings to be rooted in the soil 20 when using the nursery pot 10.

  A culture exposed portion 26 is formed on the inner surface of the recess 25 such that a part of the packaging bag 15 is torn to expose the culture 20. By embedding roots of seeds and seedlings into the soil 20 or directly entwining the soil 20 through the soil exposed portion 26, the seeds and seedlings can be surely rooted in the soil 20.

  The packaging bag 15 is composed of a biodegradable and heat fusible sheet having biodegradability and heat fusible property. As described above, by making the packaging bag 15 biodegradable, the packaging bag 15 is decomposed by microorganisms in the soil when buried in the soil.

  Therefore, after transplanting grown seedlings in the nursery pot 10, when transplanting grown seedlings into a field or the like, the whole nursery pot 10 can be transplanted as it is and buried in soil without removing the seedlings from the nursery pot 10. That is, the nursery pot 10 is disposable without having to be collected after use, and can be used as a nursery pot 10 with a small environmental load.

  Further, by forming the packaging bag 15 from a heat-fusible sheet, it is necessary to use an adhesive, a tape or the like when manufacturing the packaging bag 15 by joining the sheet edges together or closing the opening. Instead, the sheets can be firmly adhered and fixed by heat fusion.

  As described above, by constructing the packaging bag 15 only from the biodegradable / heat-sealable sheet without using an adhesive or adhesive tape which is difficult to biodegrade, the nursery pot 10 with a small environmental load is realized. Can.

The biodegradable and heat fusible sheet constituting the packaging bag 15 is a sheet obtained by mixing a PLA (polylactic acid) fiber, which is a biodegradable synthetic resin fiber, and a cellulose fiber with a paper machine. Specifically, 20 weight parts, 20 weight parts and 60 weight parts of the first polylactic acid fiber, the second poly lactic acid fiber and the cellulose fiber (beaten pulp) are mixed respectively, and the basis weight is 20 to 40 [g / m ^2] ] Is produced by papermaking to some extent.

  Here, the first polylactic acid fiber is a 5 mm long, 1.7 Dtex fiber formed from polylactic acid having a melting point of 170 ° C. The second polylactic acid fiber is a fiber having a core-sheath structure with a length of 5 mm and 2.2 Dtex, and the core part is formed of polylactic acid having a melting point of 170 ° C. and the sheath part is formed of polylactic acid having a melting point of 130 ° C. In addition, beet pulp is softwood pulp.

  The core-sheath-structured second polylactic acid fiber in which polylactic acid having a low melting point is disposed in the sheath portion functions as a binder, improves the fiber bondability at the time of papermaking, and can produce a tear resistant sheet. Of course, the mixing ratio of the first polylactic acid fiber, the second polylactic acid fiber, and the cellulose fiber can be appropriately changed, and chemical fibers such as rayon may be used as the cellulose fiber.

  As the soil 20, regenerated coconut shell fiber pieces are used. Regenerated coconut shell fiber pieces are fiber pieces produced by subjecting used coconut shell culture medium to a regeneration treatment described later, and the particle size composition of the regenerated coconut shell fiber pieces constituting the culture soil 20 is one having a particle diameter of 2.0 mm or more %, The particle size of 1.0 to 2.0 mm is 19%, the particle size of 0.5 to 1.0 mm is 32%, and the particle size of 0.5 mm or less is 41% by weight.

  If the particle size of the regenerated coconut shell fiber pieces constituting the culture soil 20 is reduced, the resilience upon water absorption after compression is reduced, which is not preferable. On the other hand, when the particle size of the regenerated coconut husk fiber pieces becomes large, the compression recovery property becomes too strong conversely, and there is a possibility that it may be expanded by moisture etc. during transportation or storage, which is not preferable. Therefore, as for the particle size of the reproduction | regeneration coconut shell fiber piece which comprises the soil 20, it is desirable that a thing of 0.5 mm or less becomes in the range of 20 to 50% by weight ratio.

  The configuration of the medium-growing nursery pot 10 has been described above, and subsequently, a method of manufacturing the nursery pot 10 will be described. FIG. 3: is a schematic diagram which shows roughly the manufacturing process of the nursery-seedling pot which concerns on this embodiment.

  First, the packaging bag 15 is manufactured. The biodegraded / heat-sealable sheet 18 is cut into rectangular sheets of a predetermined size, and the rectangular sheets are cylindrically wound and heat-sealed at both edges to obtain a predetermined size (diameter of about 47 mm). Form a cylindrical sheet having a height of about 10 cm) (see FIG. 3 (a)).

  Subsequently, the lower end portion of the cylindrical sheet is folded about 4 cm, and the lower end opening is closed and joined as a bottom surface by heat sealing. Thereby, the cylindrical-shaped packaging bag 15 which only the upper end opened is produced | generated (refer FIG.3 (b)). The height of the cylindrical packaging bag 15 closed at the lower end opening is about 6 cm.

  Then, the reproduction | regeneration method of the regenerated coconut shell fiber piece with which it is filled in this packaging bag 15 is demonstrated. It is necessary to remove the coconut shell fiber that has been used as a culture medium, since the roots of the plant raised earlier are entangled. First, the used coconut shell fiber is put into a crusher (screwbread) to crush the used coconut shell fiber in which the root and the coconut shell fiber are entangled (see FIG. 3 (c)).

  Subsequently, the crushed used coconut shell fibers are sieved (see FIG. 3 (d)). In the present embodiment, the mesh is first sieved by 5 mm, and the second pass is sieved by mesh 3.8 mm. By this sieving process, long plant roots and coconut shell fibers are removed, and only coconut shell fiber pieces having a particle size of approximately 3.8 mm or less are taken out, and the soil 20 of the above-described particle size is obtained.

  Subsequently, the sieved coconut shell fiber pieces are dried using a drier (see FIG. 3 (e)). In the present embodiment, the dried coconut shell fiber pieces 22 are dried so as to have a water content of about 15%. If the moisture content of the regenerated coconut shell fiber pieces 22 is less than 10% and is too dry, the compression / restoration property becomes strong, and it quickly expands due to moisture or the like, making it difficult to maintain the compressed state.

  On the other hand, when the moisture content of the regenerated coconut shell fiber pieces 22 is larger than 20%, the moisture is released at the time of compression, and there is a problem that the packaging bag 15 becomes wet and easily torn. Therefore, in the drying step, it is desirable to dry the regenerated coconut shell fiber pieces 22 so as to have a water content of 10 to 20%. After the drying process, the regenerated coconut shell fiber pieces 22 are completed.

  Next, the regenerated coconut shell fiber pieces 22 are filled in the cylindrical packaging bag 15 in which only the upper end is opened (see FIG. 3 (g)). The height of the packaging bag 15 which is open only at the upper end is about 6 cm, and filled with regenerated coconut shell fiber pieces 22 to a height of 5 cm. In the present embodiment, the weight of the regenerated coconut shell fiber pieces 22 to be filled is about 7 to 12 g.

  Subsequently, the packaging bag 15 filled with the regenerated coconut shell fiber pieces 22 is compressed only in the longitudinal direction by a press, whereby the nursery pot 10 containing the culture soil is completed (see FIG. 3 (h)). FIG. 4 is a perspective view showing the configuration of the piston 50 and the cylinder 55 of the press.

  As shown in FIG. 4, in the center of the lower surface of the piston 50, a convex portion 52 for forming the concave portion 25 of the above-described seedling raising pot 10 is formed. The convex portion is in the shape of an inverted truncated cone, and the diameter of the upper end portion which is a connecting portion with the lower surface of the piston is about 12 mm, the diameter of the lower end portion is about 10 mm, and the height is about 2 mm.

  The inner diameter of the cylinder 55 is 45 mm, and a tapered portion 57 is formed at the lower end portion of the cylinder 55 so that the inner diameter of the inner wall increases as it goes downward. It is done. Thus, by forming the truncated cone portion 28 on the lower side of the nursery pot 10, the nursery pot 10 after compression can be easily pulled out to the lower side of the cylinder 55 and taken out.

  In the pressing process by the press machine, the upper end opening of the packaging bag 15 filled with the regenerated coconut shell fiber pieces 22 is squeezed and then disposed in the cylinder 55 and the packaged bag containing the recycled coconut shell fiber pieces 22 at a predetermined pressure by the piston 50 Compress 15 In the present embodiment, the piston 50 is lowered at a pressure of 10 tons.

  By such a pressing process, the packaging bag 15 containing the regenerated coconut shell fiber pieces 22 is compressed into a substantially cylindrical shape having a height of about 10 mm, and the nursery pot 10 is completed. At this time, a concave portion 25 is formed at the center of the upper surface of the nursery pot 10 by the convex portion 52 formed on the lower surface of the piston 50.

  In the pressing step, since the heat fusion is not performed, the upper end opening of the packaging bag 15 is only crushed in a folded state. Therefore, a part of the upper end opening of the packaging bag 15 can be easily opened by pulling and peeling off the folded portion of the upper end opening by hand after the pressing process.

  Since the portion pressed downward by the convex portion 52 is pressed at a higher pressure than the other portions, a part of the side wall of the concave portion 25 is broken to form the above-described soil exposed portion 26. The exposed soil portion 26 is not formed together at the time of pressing, but is manually cut by cutting the biodegradable / thermally fusible sheet 18 of the side wall portion of the concave portion 25 with a cutter after the concave portion 25 is formed. It may be formed by

  According to the above manufacturing method, it is possible to manufacture the nursery pot 10 in which the recess 25 is formed on the upper surface and the truncated cone 28 is formed on the lower side. Subsequently, a method of using the nursery pot 10 will be described. FIG. 5 is a view showing a use mode of the nursery pot according to the embodiment of the present invention.

  At the time of use, first, the nursery pot 10 is arranged in a container 6 containing water. Thus, the nursery pot 10 absorbs water from the bottom surface or the like, and starts expansion only in the longitudinal direction. In this embodiment, expansion and restoration to a size before compression (about 50 mm) were performed in about 5 minutes after water absorption was started.

  Subsequently, the seed is placed in the recess 25 of the nursery pot 10. At this time, if the seeds are only placed in the recess 25, the seeds may fall outside when the nursery pot 10 falls, when the wind blows, etc., and the roots of the seeds are biodegradable. -It does not reach the soil 20 unless the heat-fusible sheet 18 is broken.

  Therefore, when placing a seed in the recess 25, it is desirable to push the seed from the culture medium exposed portion 26 into the inside of the culture soil 20. In addition, when the culture medium exposed part 26 is not formed, you may make it open the upper end opening of the packaging bag 15 by hand as mentioned above.

  In this state, the seeds are germinated and grown to a seedling 5 of a certain size (see FIG. 5). After raising the seedlings, the seedlings 5 may be buried in the field together with the raising pots 10 and transplanted, and the full-scale cultivation may be started. In the past, it was necessary to take out the seedlings from the pot and bury them in the field, and it was very time-consuming because the used nursery pots were washed and used again.

  On the other hand, in the present embodiment, since the biodegradable and heat fusible sheet 18 having biodegradability is used as the packaging bag 15, even if the nursery pot 10 is buried in the field as it is, it is decomposed into microorganisms. Because it is returned to the earth, it can be used disposable.

  As mentioned above, although this embodiment was described in detail, according to the nursery seedling pot 10, the coconut husk fiber piece 22 with high compression and restoration property is grown in the packaging bag 15 comprised from the biodegradable and heat fusible sheet 18. As it is compacted in the vertical direction, it can reduce transportation costs and storage costs, and it will not harm the environment even if it is buried in the soil at the time of transplantation.

  In addition, the biodegradable and heat fusible sheet 18 constituting the packaging bag 15 adopts biodegradable synthetic resin (polylactic acid) and cellulose fiber as constituent materials, and by mixing the cellulose fiber The manufacturing cost can be reduced, and the gaps between the fibers of the biodegradable and heat fusible sheet 18 can be closed to prevent the recycled coconut shell fiber pieces 22 contained from leaking out of the packaging bag 15. it can.

  Of course, the constituent material of the biodegradable and thermally fusible sheet 18 can be changed as appropriate, and the constituent material is composed only of a biodegradable synthetic resin (biodegradable plastic) having thermal fusible and biodegradable properties. It is also possible to use fibers of biodegradable synthetic resins (polybutylene succinate, modified polyvinyl alcohol, etc.) other than polylactic acid as appropriate.

  In addition, the biodegradable and heat fusible sheet 18 is made of a second polylactic acid fiber having a core-sheath structure that uses polylactic acid having different melting points for the core and the sheath, respectively, and has a low melting point (130 ° C.) Polylactic acid can be melted in the dryer section of the paper machine.

  Thus, multiple types of biodegradable synthetic resin fibers having different melting points are adopted as the material of the biodegradable / heat-fusible sheet 18, and the melting point of the low melting point biodegradable synthetic resin is melted in the dryer section of the paper machine By setting the temperature to a possible temperature, the manufacturing process can be simplified, and the bonding strength of the biodegradable / heat-sealable sheet 18 can be enhanced, and a sheet that is resistant to breakage can be provided.

  Then, the modification of the said embodiment is demonstrated. FIG. 6 is a perspective view of a nursery pot according to the present modification. FIG. 7 is a cross-sectional view of the nursery pot according to the present modification. In the above embodiment, the packaging bag 15 covers the entire upper surface of the nursery pot 10, but the nursery pot 10 'according to this modification is different because the upper surface of the packaging bag 15' is largely opened. Description will be made focusing on the configuration.

  In the above embodiment, in the manufacturing process of the seedling raising pot 10, after filling the regenerated coconut shell fiber pieces 22 in the packaging bag 15, the compression press is performed in a state where the upper end opening of the packaging bag 15 is folded. Then, after filling with the coconut husk fiber pieces 22, the compression press is carried out with the upper end opening of the packaging bag 15 'kept open as it is without closing.

  For this reason, the upper surface of the seedling pot 10 'compressed and pressed in the longitudinal direction is mostly open and the filled coconut fiber fiber pieces 22 are exposed, and the packaging bag 15' folded by the compression press is The upper surface of the pot 10 'only covers the peripheral portion.

  In this way, if the seedling pot 10 'is open at the upper end with most of the upper end of the packaging bag 15' open, the soil 20 (palm shell fiber pieces 22) slightly spills from the packaging bag 15 'during transportation. Although there is a possibility that the seeds and seedlings may be easily embedded or directly entangled in the culture medium 20 exposed on the upper surface, seeds and seedlings can be reliably rooted in the culture medium 20.

  As mentioned above, although embodiment of this invention was described, embodiment of this invention is not limited to the said embodiment, A various deformation | transformation is possible within the range which does not deviate from the main point of this invention. For example, the shape, size, and material of members constituting the nursery pot can be changed as appropriate, and the shape of the nursery pot may be a square cylinder or the like in addition to the substantially cylindrical shape.

  Further, in the above embodiment, the nursery pot is compressed only in the vertical direction, but may be compressed in the horizontal direction other than the vertical direction.

  Further, in the above embodiment, although the regenerated coconut shell fiber pieces are used as the culture soil, the present invention is not limited to the regenerated coconut shell fiber, and an unused coconut shell fiber may be used. For example, other culture soils such as peat moss can be appropriately used, as long as the culture soil has high compression and restoration properties.

DESCRIPTION OF SYMBOLS 10 nursery seedling pot 15 packaging bag 18 biodegradation and heat fusible sheet 20 cultivation soil 22 regenerated coconut shell fiber pieces 25 recess 26 cultivation soil exposed portion 28 truncated cone portion 50 piston 52 convex portion 55 cylinder 57 taper portion 5 seedling 6 container

Claims (7)

In a nursery pot comprising a culture soil and a packaging bag that encloses and contains the culture soil, which serves as a culture medium for growing a plant seedling for a predetermined period,
The nursery pot has a substantially cylindrical shape which is at least longitudinally compressed,
The compressed soil has a compression recovery property that expands due to water absorption,
A nursery pot characterized in that the packaging bag is formed of a biodegradable and heat fusible sheet having biodegradability and heat fusible property.   2. The nursery pot according to claim 1, wherein the biodegradable and heat fusible sheet is a sheet made by mixing biodegradable synthetic fibers and cellulose fibers.   The raising soil according to claim 1 or 2, wherein the soil is a coconut shell fiber piece obtained by crushing coconut shell fiber, and the coconut shell fiber piece having a particle diameter of 0.5 mm or less is 20 to 50% by weight. .   The growing pot according to any one of claims 1 to 3, wherein most of the upper end of the packaging bag is open, and the upper surface of the culture soil accommodated inside is largely exposed. The packaging bag covers the entire top surface of the nursery pot,
The recessed part is formed in the upper surface of the said raising seedling pot, A part of said packaging bag is opened and the said culture medium is exposed in the side wall part of the said recessed part, The said culture medium is characterized by the above-mentioned. Nursery pot of rice.   The said raising seedling pot is a substantially cylindrical shape, and has a truncated cone part which diameter becomes large gradually toward a lower end, The raising seedling pot in any one of the Claims 1 thru | or 5 characterized by the above-mentioned.   7. The nursery pot according to any one of claims 1 to 6, wherein the biodegradable and heat fusible sheet is composed of plural types of biodegradable synthetic resin fibers having different melting points.

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