JPH11137091A - Tool for raising seedling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling-raising tool capable of improving the dispersing growth of the roots of seedlings in soil to produce healthy seedlings by disposing upwardly projected projections on the bottoms of depressions for raising the seedling, respectively. SOLUTION: This seedling-raising tool 1 is obtained by disposing an upwardly projected projection 6 on the bottom of each depression 3 for raising each seedling. At least the upper end 6a of the projection 6 is preferably formed in a shape tapered toward the upper end 6a. At least the upper end 6a of the projection 6 is preferably formed in a conical, pyramidal or spherical shape tapered toward the upper end 6a. The projection is further preferably formed in a conical shape tapered toward the upper ends 6a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling raising device for raising seedlings such as rice seedlings, vegetable seedlings, and flower seedlings.

[0002]

2. Description of the Related Art For example, as a nursery box for raising rice seedlings,
In addition to a flat bottom type in which a bottom a is formed flat and a large number of drain holes b are formed in the bottom a as shown in FIG. 25, a large number of inverted cones as shown in FIGS. And the upper edge portion d of each recess c
And a recessed bottom type in which a drain hole e is provided.

In the case of the seedling raising box A1 in FIG. 25 in which the bottom a is formed flat, as shown in FIG.
Is stretched so as to crawl on the bottom part a, and a root layer g is formed in the bottom part in an overcrowded state, and it is hardly expected that the roots are dispersed and expanded in the soil in the seedling raising box. there were. Therefore, there is a problem that it is difficult to grow healthy seedlings, such as being easily affected by a slight change in the outside world, such as when the ground temperature slightly changes or water management is slightly neglected, and rooting occurs.

In order to solve the problem of the flat bottom type seedling raising box, the concave type bottom seedling raising box A2 has been developed. When using the seedling raising box A2, the area of the bottom of the seedling raising box can be increased as compared with the flat bottom type seedling raising box, and as shown in FIG. Thus, the root f can be refracted to promote the growth of the root in the upward direction, thereby enabling the root to grow on the soil in the nursery box. or,
Since the drain hole was provided at the edge of the upper end of the recess, the water content of the soil in the recess can be secured as required, and therefore,
There is an advantage that it is easy to grow healthy seedlings that are not easily affected by slight changes in the outside world.

[0005]

However, the seedling box of the type in which the recesses are arranged side by side has the following problems.

(1) When using the seedling raising box, as described above, the root can be bent at the bottom of the inverted conical recess to promote root growth in the upward direction. Unlike the bottom type nursery box, the roots could be grown on the soil in the box, but the surface that promoted the refraction of the roots was limited only to the bottom of the recess. Refraction was insufficient. Therefore, there is a problem that the roots are almost entangled in a lump state in the recess, that is, the roots tend to be in an overcrowded state in the recess, and it is difficult to grow the roots in a state of being well dispersed in the soil in the box. There was a limit to clogging and rooting.

(2) As described above, since the drainage hole is formed at the edge of the upper end of the recess, depending on the type of the seedling, the moisture content of the soil in the recess becomes excessive, and However, there was a defect that healthy seedlings could not be raised.

The present invention has been developed in view of the above problems, and an object of the present invention is to provide a seedling raising tool capable of producing good seedlings by achieving good root dispersal growth in soil. It is still another object of the present invention to provide a seedling raising tool capable of easily and reliably performing water management according to the type of seedling and producing a healthy seedling.

[0009]

The present invention employs the following means to solve the above-mentioned problems. That is, the seedling raising tool according to the present invention is characterized in that, in a recess for raising seedlings, a protrusion protruding upward is provided at the bottom of the recess.

In the above, it is preferable that at least the upper end portion of the projection is formed to be thinner toward the upper end. More specifically, at least a portion on the upper end side of the protrusion is preferably formed in a conical shape, a pyramid shape, or an upwardly projecting spherical shape tapering toward the upper end.

In the above-mentioned seedling raising tool, the projection is preferably formed as a cone that becomes thinner toward the upper end. In this case, the projection is more preferably formed as a conical body tapering toward the upper end.

[0012] In a more preferred embodiment of the seedling raising device according to the present invention, in a recess for raising seedlings, a projection protruding upward is provided at the bottom of the recess, and the recess is formed from a lower end to an upper end. While being formed to expand toward
The projection is formed as a conical body tapering toward the upper end.

[0013] In another preferred embodiment of the seedling raising device according to the present invention, a protrusion protruding upward is provided at the bottom of the recess in the seedling raising recess, and the recess has a lower end. , And the projection is formed as a pyramid that becomes thinner toward the upper end.

In each of the above-mentioned seedling raising tools, it is preferable that the lower end of the inner surface of the recess and the lower end of the outer surface of the protruding portion are continuous over the entire circumference via a downwardly protruding circular arc surface.

It is preferable that a continuous gap is formed between the outer surface of the projection and the inner surface of the recess over the entire circumferential direction.

In each of the seedling raising tools, an inclination angle of an outer surface of the projection with respect to a horizontal plane is set to 45 to 80 degrees, and a lower end portion of a gap formed between an outer surface of the projection and an inner surface of the recess is set. The angle is preferably set to 30 to 60 degrees.

In the seedling raising device according to the present invention, a plurality of protrusions projecting upward may be juxtaposed at the bottom of the recess in the seedling raising recess.

In each of the seedling raising devices, a drain hole is preferably provided at an upper end of the projection. Alternatively, a drain hole may be provided at the edge of the upper end of the recess.

In a further preferred aspect of the seedling raising device according to the present invention, a recess for raising seedlings is provided on the substrate side by side, and a projection protruding upward at the bottom of the recess in the recess. The recess is formed so as to expand from the lower end to the upper end, and the protrusion is
It is formed as a conical body that tapers toward the upper end, the upper end height of the protrusion is set lower than the upper end opening of the recess, and a circumferential direction is provided between the outer surface of the protrusion and the inner surface of the recess. A continuous gap is formed over the entirety, an inclination angle of the outer surface of the protrusion with respect to a horizontal plane is set to 45 to 80 degrees, and a gap formed between the outer surface of the protrusion and the inner surface of the recess is formed. The angle of the lower end is set to 30-60 degrees,
Also, a drain hole is provided at the upper end of the projection.

In another preferred embodiment of the seedling raising device according to the present invention, a recess for raising seedlings is provided on the substrate, and the recessed portion protrudes upward from the bottom of the recess in the recess. A protrusion is provided, and the recess is formed so as to expand from a lower end thereof to an upper end, and the protrusion is formed as a conical body tapering toward the upper end. The height of the upper end is set lower than the upper end opening of the recess, and a continuous gap is formed between the outer surface of the protrusion and the inner surface of the recess over the entire circumferential direction, and the outer surface of the protrusion is The inclination angle with respect to the horizontal plane is set at 45 to 80 degrees, the angle of the lower end portion of the gap formed between the outer surface of the projection and the inner surface of the recess is set at 30 to 60 degrees,
Further, a drain hole is provided at an edge portion of the upper end of the recess.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment In FIG. 1 to FIG. 4, a seedling raising device 1 according to the present invention is applied in a flat rectangular box shape having an open upper end, for example, as a box for raising rice seedlings. In the bottom plate 2, a large number of the seedling raising recesses 3 are juxtaposed so as to form square meshes extending in front, rear, left and right in plan view. In the present embodiment, these recesses 3 are provided with the bottom plate 2 depressed.

In the present embodiment, the recess 3 is
It is formed as an inverted trapezoidal recess expanding from the lower end toward the upper end. Further, a conical protrusion 6 that becomes thinner toward the upper end is protruded from the bottom 5 of the recess 3, and the upper end 6 a of the protrusion 6 is set slightly lower than the upper end opening 7 of the recess 3. ing. As shown in FIG. 3, the lower end 10 of the outer surface 9 of the projection 6 matches the lower end 12 or the bottom 5 of the inner surface 11 of the recess 3, and there is a gap between the outer surface 9 and the inner surface 11. An annular space 15 which is continuous over the entire circumferential direction and has a sharp lower end is formed. As shown in FIG. 4, the inclination angle θ1 of the outer surface 9 with respect to the horizontal plane is set to be as large as about 70 degrees, and the angle θ2 of the gap 15 between the protrusion and the recess is about 40 degrees. Is set relatively small. A drain hole 16 is provided in the upper end 6a of the projection 6 in the vertical direction.

For raising rice seedlings, for example, using the box-shaped seedling raising device 1 having such a configuration, seedlings 19 are sown on soil 17 in the box-shaped seedling raising device 1 as shown in FIG. Cover with appropriate soil and irrigate. This irrigation causes the soil to contain water, and excess water is discharged from the drain hole 16.
In the present embodiment, since the drainage hole 16 is provided at the upper end 6a of the protrusion 6, the water content of the soil in each recess 3 depends on the height of the drainage hole 16. For example, 20-25
% Is set to an appropriate value.

However, the root 20 extending downward hits the outer surface 9 of the projection 6 or the inner surface 11 of the recess 3 and extends while bending. Some of them are entangled in the recess 3 and others extend upward along the inner surface 11 of the recess and the outer surface 9 of the projection. In FIG. 5, the case of bending and extending upward is partially shown. The root 20 a extends obliquely downward along the outer surface 9 of the protrusion, and then near the lower end of the outer surface 9, this time, It extends upward along the inner surface 11. 20b
Extends obliquely downward along the inner surface 11 of the recess, and in the vicinity of its lower end, in turn, extends upward along the outer surface 9 of the projection. Further, the root 20c refracts and extends on the outer surface 9 of the projection, and then refracts again on the inner surface 11 of the recess and extends upward. Further, the root 20d refracts on the inner surface 11 of the recess and extends, and then refracts on the outer surface 9 of the protrusion and extends upward.
Arrows in the illustration of the roots 20a to 20d indicate the directions in which the roots extend.

In this manner, the root 20 is extended while repeatedly bending the outer surface 9 of the projection and the inner surface 11 of the recess, and is guided (ie, oriented) by the outer surface 9 and the inner surface 11.
It stretches and stretches in each direction with proper entanglement. And, as described above, between the outer surface 9 of the projection and the inner surface 11 of the recess,
An annular gap 15 having a sharpened lower end is formed, and a portion of the gap 15 between the protrusion and the recess has a relatively small angle θ2 of about 40 degrees as shown in FIG. Therefore, the root descending from the outer surface 9 is easily oriented upward along the inner surface 11. Alternatively, the roots descending from the inner surface 11 are likely to be directed upward along the outer surface 9.

In the present embodiment, since the projection 6 is formed in a conical shape, the root that comes into contact with the upper end portion 21 of the outer surface 9 of the projection is guided by the inclined outer surface 9 without difficulty and descends. it can. Further, since the outer surface 9 of the projection is a smooth inclined surface over the entire circumference, the root can be guided by the outer surface 9 without any obstacle. In addition, a part of the root may enter the drain hole 16, but there is no problem.

The angle θ2 of the gap 15 is set to 4 as described above.
Since the angle is set to a relatively small value of about 0 degrees, the root extending along the inner surface 11 of the recess 3 and the outer surface 9 of the protrusion 6 can be guided upward as much as possible. Further, since a continuous gap 15 is formed between the outer surface 9 of the projection and the inner surface 11 of the recess over the entire circumferential direction, the entire circumferential direction (the front, rear, left and right facing surfaces shown in FIG. 6). 9a, 11a, 9b, 11b, 9c, 11c,
In 9d, 11d), the root can be guided by the inner surface 11 of the recess or the outer surface 9 of the projection to allow the root to grow smoothly.

From the above, the roots are well dispersed in the soil, and the nutrients and water of the soil are effectively absorbed to grow healthy seedlings. In other words, the rooting becomes much better than in the conventional nursery box of the bottom side-by-side type, so that the growth of the seedling is less likely to be affected by some external changes,
It is possible to produce healthy seedlings that have good survival after rice planting.

In the case of the present embodiment, as shown in FIG. 7, the lower end of the inner surface 11 of the recess 3 and the lower end of the outer surface 9 of the projection 6 extend over the entire circumference to form an arcuate surface 22 projecting downward. May be connected. In this case, the root that is guided and lowered by the outer surface 9 is guided by the arc surface 22 and rises along the inner surface 11, or the root that is guided and lowered by the inner surface 11 is guided by the arc surface 22. And it is expected to rise along the outer surface 9.

[Second Embodiment] FIG. 8 shows another embodiment of the seedling raising device 1 according to the present invention. For example, vegetable seedlings such as eggplant, tomato, onion, cucumber, watermelon, etc. It is used for raising relatively large seedlings such as flower seedlings, and is formed not in a box shape having an upright wall around it but in a mat shape as described above. Recess 3 and projection 6 projecting from bottom 5 thereof
Is similar to that for the rice seedlings described above, but the diameter and depth of the recess 3 are formed to be large, and the projection 6 is formed to be large accordingly. It should be noted that seedling raising tools having such large dimensions may be configured in a box shape. Conversely, the seedling raising tool shown in the first embodiment may be configured in a mat shape.

The procedure for raising seedlings using the seedling raising device 1 having such a configuration and the growth state of the roots are the same as those described above, and therefore description thereof will be omitted.

When growing relatively large seedlings such as vegetable seedlings, it is preferable to set the soil water content higher than that of rice seedlings (about 30 to 40%). ,
Instead of being provided at the upper end of the protrusion 6 as shown in FIG.
As shown in the figure, the recess 3 may be provided in the peripheral portion 22 at the upper end.

Also in the case of the present embodiment, as shown in FIG. 9, the lower end of the inner surface 11 of the recess 3 and the lower end of the outer surface 9 of the projection 6 are formed so as to extend downward over the entire circumference. There is a case where the configuration is continued by 22.

[Other Embodiments] In the present invention,
The shapes of the recess 3, the protrusion 6, and the drain hole 16 can be variously modified. Next, the mode is illustrated.

(1) FIGS. 10 to 11 show a configuration in which the protrusion 6 is formed in the shape of a pyramid in the case of the above embodiment, and the drain hole 16 provided at the upper end of the protrusion 6 has a rectangular shape. It is formed in a hole.

(2) FIGS. 12 to 15 show that the concave portion 3 is formed in an inverted truncated cone shape having a tapered shape extending from the lower end to the upper end, and the maximum diameter of the upper end (shown by a two-dot chain line in FIG. 12). , D is a vertex 27, 27, 2 of an imaginary square mesh 26 indicated by a chain line in FIG.
7 and 27 are set. Therefore, the peripheral portion 25 at the upper end of the truncated conical recess adjacent to the front, rear, left and right has the highest height at the vertex 27 of the square mesh, the portion 25a between the front and rear adjacent vertices and the space between the left and right adjacent vertices. Is formed so as to draw a downward protruding parabola. 14 is a sectional view taken along the line AA in FIG. 13, and FIG. 15 is a sectional view taken along the line BB in FIG.

At the bottom of the recess 3, a conical protrusion 6 is formed which is tapered toward the upper end.
The position a is set slightly lower than the upper end opening 7 of the recess 3. The lower end of the outer surface 9 of the projection 6 and the lower end 32 of the inner surface 11 of the recess 3 are aligned with each other. , An annular space 15 which is continuous and has a sharp lower end is formed. The portion of the gap 15 between the protrusion and the recess has an angle θ
2 is set to a relatively small value of about 40 degrees (FIG. 1)
5).

The inclination angle θ1 of the outer surface 9 with respect to the horizontal plane is set to about 70 degrees (FIG. 15).
A drain hole 16 is provided at the upper end of the upper end in the vertical direction. Also in the case of the present embodiment, as shown in FIG. 16, the lower end of the inner surface 11 of the recess 3 and the lower end of the outer surface 9 of the projection 6 are connected by a downwardly projecting arc surface 22 over the entire circumference. Configuration.

(3) FIGS. 17 to 20 show an inverted truncated conical shape having a tapered shape that is concentric and has a larger diameter from the lower end toward the upper end so as to be continuous with the lower end of the hole 35 having a square shape in plan view. The recess 3 is formed by providing the hole 36 of the recess 3.
A conical protrusion 6 having the same structure as described above and narrowing toward the upper end is protruded from the bottom 5, and the position of the upper end 6 a of the protrusion 6 is set slightly lower than the upper end opening 7 of the recess 3. The following shows the configuration. 19 is a sectional view taken along line AA in FIG. 18, and FIG. 20 is a sectional view taken along line BB in FIG.

The lower end of the outer surface 9 of the projection 6 and the recess 3
The lower end of the inner surface 11 is aligned with the outer surface 9 of the projection and the inner surface 11 of the recess. I have. The portion of the gap 15 between the protrusion and the recess has an angle θ
2 is set to about 40 degrees (FIG. 19). Further, the inclination angle θ1 of the outer surface 9 with respect to the horizontal plane is set to about 70 degrees (FIG. 19), and a drain hole 16 is vertically formed at the upper end of the projection 6.

Also in this embodiment, as shown in FIG. 21, the lower end of the inner surface 11 of the recess 3 and the outer surface 9 of the projection 6 are formed.
May be connected to each other by an arcuate surface 22 projecting downward over the entire circumference.

(4) The inner surface 11 of the recess 3 is formed not only as the circumferential surface shown in FIG. 3 or the bent surface shown in FIG. 10 but also as various surfaces such as a combination of an arc surface and a bent surface. it can.

(5) The protrusion 6 has a conical shape shown in FIG.
In addition to being formed in a pyramid shape shown in FIG. 0, it may be formed in a column shape such as a column shape or a prism shape. In this case, at least the upper end portion of the protrusion is formed in a conical shape, a pyramid shape, or a spherical shape of the protrusion projecting upward toward the upper end, so that the root contacting the upper end portion of the outer surface of the protrusion is formed. It is preferable because it can be easily oriented downward.

FIG. 22 shows an example in which the projection 6 is formed in a cylindrical shape, and the upper end portion 43 is formed in a spherical shape with an upward projection. In this case as well, for example, as shown by a dashed line in the figure, the root 20 on the outer surface 9 of the protrusion 6 is refracted, and compared with the case of the conventional seedling box of the concave side-by-side type, Good rooting can be achieved by increasing the chance of root refraction. Note that the root 2 in FIG.
In the illustration of 0, the arrow indicates the extension direction.

(6) As described above, between the outer surface 9 of the projection 6 and the inner surface 11 of the recess 3, a continuous gap is formed over the entire circumferential direction. It is preferable that the rooting can be made better, such as increasing the chance of root refraction. However, it may be configured such that a gap is formed only on both sides of the protrusion or one side of the protrusion.

(7) The upper end of the protrusion 6 is not limited to the one located below the upper end opening 7 of the recess 3 as shown in the above embodiment, and may be protruded from the upper end of the recess. is there.

(8) For example, as shown in FIG. 4, the upper end position of the projection 6 is set lower than the upper opening 7 of the recess 3 and the drain hole 16 is provided at the upper end of the projection. Is
By setting the height of the protrusion 6 as required, water can be retained up to the height of the drain hole 16. Therefore, the optimum moisture content of the soil in the recess or the soil near the upper side thereof according to the type of the seedling to be raised can be set as required by the height of the protrusion. FIG. 23 shows a case where the height of the protrusion 6 is set lower than that in FIG. 4 and the drainage hole 16 is provided at the upper end of the protrusion.

(9) The lower end of the projection may be connected to the inner surface of the recess through the flat bottom of the recess.

(10) The form of the drain hole 16 is not limited to the circular hole and the square hole described above, but may be set to various types such as a triangular hole.

(11) The bottom 5 of the recess 3 may be formed as a curved surface as shown in FIG. 24, for example.

(12) A plurality of projections 6 may be provided at the bottom of the recess. In this case, the form of the protrusion includes the various types described above.

(13) When the seedling raising device according to the present invention is formed in a box shape or a mat shape as described above, the drain holes 16 do not correspond to each of the recesses, and It may be provided on the periphery of the upper end of the protrusion or the upper end of the recess.

[0053]

The present invention has the following excellent effects. (1) Since the seedling raising device according to the present invention is provided with a projection projecting upward at the bottom of the seedling-growing recess, not only on the inner surface and the bottom of the recess but also on the outer surface of the protrusion. The root can be refracted. Therefore, according to the present invention, the area of guiding the roots can be increased by the presence of the outer surface of the protruding portion, as well as the opportunity of refraction of the roots, as compared with the case of the conventional nursery box of the bottom side-by-side type. Can be greatly increased, so that the roots can be well dispersed and extended in the soil.

In addition, since the projection is provided at the bottom of the recess, the outer surface of the projection having a certain angle with respect to the horizontal plane also serves as a guide portion for guiding the root upward or downward. As a result, not only does the root intertwine with the gap between the outer surface of the protrusion and the inner surface of the recess, but also the root that extends downward by being guided by the inner surface of the protrusion has the lower end of the outer surface of the protrusion or It is strongly refracted near the lower end, and can be extended upward along the inner surface of the recess, or the root that extends downward by being guided by the inner surface of the recess is strongly bent at the lower end or near the lower end of the inner surface. , And can be extended upward along the outer surface of the projection. By these means, the roots can be released from the overcrowded state, and therefore, the roots can be dispersed and grown in the soil more favorably than in the case of the conventional seedling box of the bottom side-by-side type. As a result, it is possible to produce healthy seedlings with good rooting and good survival.

In particular, the inclination angle of the outer surface of the projection with respect to the horizontal plane is set to a relatively large value of about 45 to 80 degrees, and the angle of the lower end portion of the gap between the outer surface of the projection and the inner surface of the recess is set to 30 degrees.
By setting the angle relatively small at about 60 degrees, it is possible to clearly direct the root growth from the outer surface of the projection to the inner surface of the recess or vice versa. This is preferable because the roots extending along the outer surface of the portion and the inner surface of the recess can be easily grown upward.

(2) By providing a drain hole at the edge of the upper end of the projection or the upper end of the recess, the water content of the soil in the recess can be set as desired. In particular, when providing a drainage hole at the upper end of the projection, the height of the projection is set as required according to the type of seedling to be raised, so that a drainage hole is formed according to the height of the upper end of the projection. Because you can set the position of
According to the kind of the seedling, there is an advantage that the moisture content of the soil in the recess or the vicinity thereof can be optimized.

(3) By forming the projections narrower toward the upper end, for example, in a conical shape or a pyramid shape,
It is easy to extend along the outer surface of the projection.

(4) Further, by forming the upper end portion of the projection into a conical shape, a pyramid shape or a spherical shape projecting upward toward the upper end, the descended root is formed at the upper end of the outer surface of the projection. It is possible to easily direct the downward growth of the root after contacting the portion.

(5) In particular, when the projection is formed in a conical shape or a truncated cone shape, the root can be guided on the outer peripheral surface without any obstacle since the entire outer peripheral surface is a smooth surface. , Can promote smooth root growth.

(6) By forming a continuous gap over the entire circumferential direction between the outer surface of the projection and the inner surface of the recess,
Refraction of the root on each of the front, rear, left and right facing surfaces of the recess is achieved, and the opportunity for refraction of the root can be further increased,
That can improve the foundation.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a seedling raising device.

FIG. 2 is a partially enlarged perspective view of FIG.

FIG. 3 is an enlarged perspective view showing a recess and a protrusion protruding from a bottom thereof.

FIG. 4 is a cross-sectional view showing a recess and a protrusion protruding from the bottom thereof.

FIG. 5 is a cross-sectional view showing a rooted state of a seedling by the seedling raising device of the present invention.

FIG. 6 is a plan view showing a recess and a protrusion protruding from the bottom thereof.

FIG. 7 is a cross-sectional view showing another mode of the recess and the protrusion protruding from the bottom thereof.

FIG. 8 is a sectional view showing another embodiment of the seedling raising device.

FIG. 9 is a cross-sectional view showing a case where a drain hole is provided in a peripheral portion of an upper end of a recess in the seedling raising device.

FIG. 10 is a perspective view showing another mode of the recess and the projection.

FIG. 11 is a sectional view thereof.

FIG. 12 is a partial perspective view showing another aspect of the seedling raising device.

FIG. 13 is a plan view thereof.

FIG. 14 is a sectional view thereof.

FIG. 15 is a sectional view thereof.

FIG. 16 is a sectional view showing another embodiment of the seedling raising device.

FIG. 17 is a partial perspective view showing another embodiment of the seedling raising device.

FIG. 18 is a plan view thereof.

FIG. 19 is a sectional view thereof.

FIG. 20 is a sectional view of the same.

FIG. 21 is a cross-sectional view showing another embodiment of the seedling raising device.

FIG. 22 is a cross-sectional view showing another embodiment of the seedling raising device.

FIG. 23 is a cross-sectional view showing another embodiment of the seedling raising device.

FIG. 24 is a cross-sectional view showing another embodiment of the seedling raising device.

FIG. 25 is a partial perspective view showing an example of a conventional seedling raising box.

FIG. 26 is a partial perspective view showing another example of a conventional seedling raising box.

FIG. 27 is a cross-sectional view showing a rooted state of a seedling by the seedling raising box shown in FIG. 25.

FIG. 28 is a cross-sectional view showing a rooted state of a seedling with the seedling raising device shown in FIG. 26;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nursery tool 3 Concave part 5 Bottom part 6 Protrusion part 9 Outer surface of protrusion part 11 Inner surface of concave part 15 Void 16 Drainage hole 20 Root 22 Arc surface

Claims (15)

[Claims] 1. A seedling raising tool characterized in that, in a seedling raising recess, a projection projecting upward is provided at the bottom of the recess. 2. The seedling raising device according to claim 1, wherein at least a portion on the upper end side of the protrusion is formed to be thinner toward the upper end. 3. The seedling raising tool according to claim 1, wherein at least an upper end portion of the projection is formed in a conical shape, a pyramid shape, or an upwardly projecting spherical shape tapering toward the upper end. . 4. The seedling raising tool according to claim 1, wherein the projection is formed as a cone that tapers toward the upper end. 5. In a recess for raising seedlings, a protrusion is provided at the bottom of the recess to protrude upward, and the protrusion is
A seedling raising tool characterized in that it is formed as a cone that tapers toward the upper end. 6. In a recess for raising seedlings, a projection protruding upward is provided at a bottom of the recess, and the recess is formed so as to expand from a lower end to an upper end. In addition, the protrusion is formed as a cone that becomes thinner toward the upper end. 7. In a seedling raising recess, a projection projecting upward is provided at a bottom portion of the recess, and the recess is formed so as to expand from a lower end to an upper end. In addition, the protrusion is formed as a pyramid that becomes thinner toward the upper end. 8. The method according to claim 1, wherein the lower end of the inner surface of the recess and the lower end of the outer surface of the projection are continuous over the entire circumference via a downwardly projecting arc surface. The seedling raising device described in the crab. 9. The air gap according to claim 1, wherein a continuous gap is formed between the outer surface of the projection and the inner surface of the recess over the entire circumferential direction. Nursery tools. 10. The inclination angle of the outer surface of the projection with respect to the horizontal plane is set to 45 to 80 degrees, and the angle of the lower end portion of the gap formed between the outer surface of the projection and the inner surface of the recess is 30 to 80.
10. The angle is set to 60 degrees.
The seedling raising device according to any one of the above. 11. A seedling raising tool, wherein a plurality of protrusions projecting upward are juxtaposed at the bottom of the recess in the seedling raising recess. 12. The seedling raising tool according to claim 1, wherein a drain hole is provided at an upper end of the projection. 13. The seedling raising device according to claim 1, wherein a drain hole is provided in an edge portion of an upper end of the recess. 14. A seedling raising recess is provided on the substrate side by side, and a projection protruding upward is provided in a bottom of the recess in the recess, and the recess is provided with: While being formed to expand from the lower end to the upper end,
The protrusion is formed as a conical body that tapers toward the upper end, the height of the upper end of the protrusion is set lower than the upper end opening of the recess, and between the outer surface of the protrusion and the inner surface of the recess. A continuous gap is formed over the entire circumferential direction, the inclination angle of the outer surface of the protrusion to the horizontal plane is set to 45 to 80 degrees, and between the outer surface of the protrusion and the inner surface of the recess. A seedling raising tool, wherein an angle of a lower end portion of the formed void is set to 30 to 60 degrees, and a drain hole is provided at an upper end of the projection. 15. A seedling raising recess is juxtaposed on a substrate, and a projection protruding upward is provided in a bottom of the recess in the recess, and the recess is provided with: While being formed to expand from the lower end to the upper end,
The protrusion is formed as a conical body that tapers toward the upper end, the height of the upper end of the protrusion is set lower than the upper opening of the recess, and the gap between the outer surface of the protrusion and the inner surface of the recess is formed. A continuous gap is formed over the entire circumferential direction, the inclination angle of the outer surface of the protrusion to the horizontal plane is set to 45 to 80 degrees, and between the outer surface of the protrusion and the inner surface of the recess. A seedling raising tool, wherein the angle of the lower end portion of the formed void is set to 30 to 60 degrees, and a drain hole is provided in the edge portion of the upper end of the recess.