JP2021052688A - Container holder, seedling-raising kit, and method for producing forest tree seedlings - Google Patents

Abstract

To provide a container holder of independent-type seedling-raising containers which is suitable for raising forest tree seedlings, can efficiently produce forest tree seedlings, and improve workability, and application of the holder.SOLUTION: A container holder for raising forest tree seedlings that detachably holds a cylindrical seedling-raising container having a flange part continuous from an outer edge of a seedling-raising hole upper end opening part, comprises: a planar frame part which consists of a plurality of holding units U1 to U6, U22 to U24; and a support part which supports the seedling-raising containers installed to the frame part approximately horizontally while bottom surface parts of the containers do not contact the ground. The plurality of holding units has holding frame parts which surround opening parts having a size that the seedling-raising containers can go into but the flange parts cannot go into.SELECTED DRAWING: Figure 1

Description

The present invention relates to a container holder, a seedling raising kit, and a method for producing forest seedlings.

As for forest seedlings such as Sugi and Hinoki, bare seedlings cultivated in the open field and seedlings using pots or containers that are raising seedling containers are produced. Among these, as a container used for container seedling production, a hard plastic seedling raising container having a large number of seedling raising holes is widely used.

Non-Patent Document 1 describes a multi-cavity container having a plurality of holes for growing seedlings, providing ribs and slits on the side surfaces, providing an opening at the bottom of the cavity, and floating the bottom surface in the air or a net shelf having a large gap. It is described that air root cutting can be performed by placing it on the top, and root wrapping and root deformation can be prevented.

Patent Document 1 describes that a seedling raising container having a storage portion having a predetermined shape is excellent in workability at the time of planting and replanting.

JP-A-2017-79706

Toshiaki Endo, Ken Yamada (2009) "JFA-150 Container Seedling Raising / Planting Manual" Low Cost New Seedling / Afforestation Technology Development Project Report (2008), 74-90 http: // www. rinya. maff. go. jp / j / kanbatu / subiyou / pdf / 15-kontenanae_ikubyou_syokusai_manyuaru. pdf

Non-Patent Document 1 introduces a bench for holding a multi-cavity container in a floating state, but since a container filled with hilling has a certain weight, the bench and net shelf that support it are made of inexpensive materials. It is difficult to produce, and in reality it is necessary to introduce an expensive nursery rack. Further, even if a nursery shelf is installed, the size of the container that can be used may be limited because root wrapping occurs at a place where the bottom surface of the container touches the nursery shelf.

In addition, when ungerminated seedlings or poorly grown seedlings occur in a part of a seedling raising container having a large number of seedling raising holes, it is very difficult to move the seedlings to another seedling raising hole or replace it with another seedling. There is a problem that it is troublesome and practically difficult. Such seedlings are pressed by the surrounding seedlings, making it difficult for them to be exposed to light, resulting in further deterioration of growth.

The seedling raising container of Patent Document 1 does not mention the holding means at the time of use. When actually using the seedling raising container, the container was held so as not to fall by using a substitute such as a gardening tray. However, it is difficult to adjust the height between the seedling raising container and the ground plane with a substitute, and the seedling raising pots that can be used are limited to those that fit the size of the substitute. There were inconveniences such as difficulty in holding and therefore difficulty in putting in soil.

An object of the present invention is to provide a container holder for a seedling raising container suitable for raising seedlings of a forest seedling, which can efficiently produce a plurality of forest seedlings according to individual growth ability and improve workability, and its use. ..

The present invention provides the following [1] to [16].
[1] A container holder for raising seedlings in a forest, which detachably holds a tubular seedling raising container having a flange portion continuous with the outer edge of the upper end opening of the seedling raising hole.
A flat frame consisting of multiple holding units and
The seedling raising container mounted on the frame part is provided with a support part that supports the seedling raising container substantially horizontally without the bottom part touching the ground.
The holding unit has a holding frame portion that surrounds an opening having a size that allows the seedling raising container to enter but the collar portion cannot enter.
Container holder for raising seedlings in forests.
[2] The forest seedling according to [1], wherein the holding unit is a groove continuously provided on the outer edge of the opening and further has a fitting portion into which the saliva portion is substantially fitted when the seedling raising container is mounted. Container holder for raising seedlings.
[3] The container holder according to [1] or [2], wherein a plurality of holding units are arranged in a matrix in the frame portion when viewed from the main surface.
[4] The container holder according to any one of [1] to [3], wherein the opening of the holding unit has a substantially rectangular shape.
[5] The container holder according to any one of [1] to [4], wherein the support portion has a bottom frame portion that opens to the ground plane and a strut portion that extends from the holding frame portion to the bottom frame portion. ..
[6] The container holder according to any one of [1] to [5], wherein the seedling raising container is a stand-alone seedling raising container.
[7] The holding unit is provided in a part of the holding frame portion adjacent to the outer edge of the fitting portion, and has a recess which is a recess into which a finger can be inserted when taking out the seedling raising container mounted on the frame portion. The container holder according to any one of [1 to [6].
[8] The container holder according to any one of [1] to [7] and
A seedling raising kit containing a plurality of combinations of tubular seedling raising containers having a collar on the outer edge of the opening on the upper surface of the growing hole.
[9] The holding unit of the container holder is a groove continuously provided on the outer edge of the opening, and further has a fitting portion into which the saliva portion is substantially fitted when the seedling raising container is mounted.
The seedling raising kit according to [8], wherein the collar portion of the seedling raising container has a size that can be substantially fitted to the fitting portion of the container holder.
[10] The seedling raising kit according to [8] or [9], wherein the plurality of seedling raising containers include two or more kinds of seedling raising containers that are different from each other.
[11] The seedling raising kit according to any one of [8] to [10], wherein the plurality of seedling raising containers include a stand-alone seedling raising container.
[12] The seedling raising kit according to any one of [8] to [11], further comprising at least one selected from the group consisting of hilling and fertilizer.
[13] A method for producing a forest seedling, which comprises raising a forest seedling using the seedling raising kit according to any one of [8] to [12].
[14] Mounting process of mounting the seedling raising container on the container holder,
Planting process of planting seeds, seedlings, cuttings or rooted seedlings of forest seedlings in the nursery holes of the nursery container,
Cultivation soil filling process, which fills the seedling raising holes
The method for producing forest seedlings according to [13], which includes a seedling raising step for growing seedlings and an air root cutting step for cutting air roots.
[15] In the soil filling step, the soil is loaded on the upper surface of the frame portion, the container holder is vibrated to drop the soil into the seedling raising hole, and the soil that has not fallen into the seedling hole is dropped by scraping [13]. Alternatively, the method for producing forest seedlings according to [14].
[16] The method for producing forest seedlings according to any one of [13] to [15], further comprising a sorting step of sorting seedlings according to size in the middle of the seedling raising step.

According to the present invention, since a plurality of seedling raising containers can be held and can be attached and detached, many forest seedlings can be efficiently produced, for example, a plurality of forest seedlings can be produced at one time under the optimum conditions according to the tree species and growth ability. A container holder that can be produced is provided. By using the container holder of the present invention, the bottom surface of the container can be held so as to come into contact with air without being grounded, so that air root cutting becomes possible. In addition, sufficient light can be obtained even for seedlings that have been delayed in growth, and more seedlings can meet the shipping standards (the seedling yield rate has increased). That is, seedlings that meet the shipping standards can be efficiently produced.
According to the present invention, since seedlings can be raised using a plurality of different seedling raising containers at one time, the optimum conditions can be selected for each forest seedling according to the tree species and the growth ability of the seedling individual, and the seedlings are planted in the mountain. Problems such as poor growth and death can be solved later.

FIG. 1 is a perspective view showing an example of a schematic aspect of the container holder of the present invention. FIG. 2 is a top view of the container holder of FIG. FIG. 3 is a side view of the container holder of FIG. FIG. 4 is a perspective view showing another example of a schematic aspect of the container holder of the present invention. FIG. 5 is a top view of the container holder of FIG. FIG. 6 is a cross-sectional view of the container holder of FIG. 3 (cross section of arrow A1 of FIG. 1). FIG. 7 is a partial plan view showing an example of the holding frame portion and the opening portion. FIG. 8 is a partial plan view showing an example of the holding frame portion and the opening portion. FIG. 9 is a partial plan view showing an example of the holding frame portion and the opening portion. FIG. 10 is a partial perspective view of one unit constituting the container holder of FIG. FIG. 11 is a perspective view showing an example of a schematic aspect of a seedling raising container targeted by the container holder of the present invention. FIG. 12 is a side view of the seedling raising container holder of FIG. FIG. 13 is a top view of the seedling raising container holder of FIG. FIG. 14 is a cross-sectional view of the seedling raising container holder of FIG. 11 (cross section of arrow A2 of FIG. 11).

[1. Container holder]
As used herein, the container holder refers to a holder used to hold a seedling raising container during at least one period of rooting period and seedling raising period in the production process of forest seedlings. The container holder of the present invention can detachably hold the seedling raising container. Since the bottom surface of the held container is not grounded and comes into contact with air, air root cutting is possible.
In addition, when ungerminated seeds or poorly grown seedlings appear, only some of the seedling raising containers can be replaced with other seedling raising containers, and the seedling raising container with delayed growth seedlings can be moved to a place with good growth conditions such as light. Therefore, more seedlings can meet the shipping criteria (the seedling yield rate can be increased). Further, since the seedling raising container of the present invention is removable, different capacity seedling raising containers can be used, and the seedling raising container having the optimum capacity can be selected depending on the tree species.

Examples of forest seedling tree species include pine (eg, black pine, red pine), larch (eg, larch, guimatsu), spruce (eg, spruce, spruce), fir (eg, todomatsu), and sugi (eg, todomatsu). Conifers such as Sugi, Hinoki (eg, Hinoki), and their hybrids (eg, larch and Guimatsu hybrids (Clean Larch, etc.)), Eucalyptus (eg, Eucalyptus), Mizuki (eg, Mizuki), Examples include, but are not limited to, broad-leaved trees such as the genus Sakura (eg, Sakura), the genus Shii (eg, Shii), and the genus Larch (eg, Larch).

(Frame part)
The container holder of the present invention includes a frame portion. The frame portion is a flat plate-shaped frame for holding the seedling raising container.

The frame portion is composed of a holding unit. The holding unit is a unit that holds one seedling raising container per unit, and has at least a holding frame portion and a fitting portion. The holding frame portion is a frame surrounding the opening for holding the seedling raising container.

The opening has a size that allows the nursery container to enter but the collar cannot enter, and penetrates from the main surface to the back surface of the frame portion. Therefore, when the seedling raising container is attached to the holding frame portion, the collar portion of the seedling raising container is larger than the opening of the holding frame portion and cannot enter, and the accommodating portion enters the opening and is suspended from the lower part of the frame portion. .. By touching the air without touching the bottom of the seedling raising container suspended from the frame, air root cutting can be performed reliably.

The holding frame portion preferably has a fitting portion. The fitting portion is a groove that surrounds the opening and is continuously provided. The container holder of the present invention is intended for a seedling raising container having a collar portion, but when the seedling raising container is attached, the spit portion of the seedling raising container is substantially fitted to the fitting portion. As a result, the seedling raising container having a collar portion matching the size of the fitting portion can be stably held, and the seedling raising container once attached to the holding unit can be easily taken out by lifting the collar portion. Further, it is more preferable that the fitting portion forms a substantially horizontal plane between the flange portion of the seedling raising container and the flat surface of the frame portion when the collar portion of the seedling raising container is substantially fitted to the fitting portion. As a result, workability can be improved, for example, the soil that does not enter the seedling raising hole can be easily removed when the soil is packed.

The shape and size of each of the opening and the fitting portion may be appropriately determined according to the shape of the target seedling raising container, and an example is as follows. Examples of the shape of the opening include a substantially circular shape and a substantially rectangular shape, and the substantially rectangular shape is preferable. The area of the opening is usually 12.2 cm ² or more, preferably 16 cm ² or more, and more preferably 20 cm ² or more. The upper limit is usually 43 cm ² or less, preferably 36 cm ² or less, and more preferably 31 cm ² or less. The maximum diameter of the opening is usually 3.5 cm or more, preferably 4 cm or more, and more preferably 4.5 cm or more. The upper limit is usually 7 cm or less, preferably 6.5 cm or less, and more preferably 6 cm or less. The width of the groove (between the end of the opening and the outer edge of the fitting portion: W1 in FIG. 2) of the fitting portion is usually 1 mm or more, preferably 2 mm or more, and more preferably 3 mm or more. The upper limit is usually 6 mm or less, preferably 5 mm or less, and more preferably 4 mm or less. The depth of the fitting portion (D1 in FIG. 3) is usually 0.5 mm or more, preferably 1 mm or more, and more preferably 1.5 mm or more. The upper limit is usually 3.5 mm or less, preferably 3 mm or less, and more preferably 2.5 mm or less.

The holding unit may further include a recess. The recess may be a recess provided in a part of the holding frame portion into which a finger can be inserted when taking out the seedling raising container, and the size thereof is not particularly limited. For example, the width is about 1 cm to 3 cm and the depth is about 1 cm to 3 cm. The size is about 3 mm to 7 mm. The position of the recess is provided adjacent to the outer edge of the fitting portion. The number of recesses per unit may be one or two or more, and the two units may share one recess.

The frame portion is composed of a plurality of holding units, and the holding units may be arranged in a random shape, a unidirectional parallel shape, or a matrix shape, but a matrix shape is preferable. As a result, it becomes easy to grasp the position of the seedling raising container, and it becomes easy to grasp the growth ability of the seedling individual.

The frame portion may be further provided with an arbitrary configuration such as a handle for transportation and a drain hole inside and outside the holding unit.

The frame portion will be described by taking FIGS. 1 to 5 as an example. In the example shown in FIGS. 1 to 3, the frame portion 1 is composed of holding units U1, U2, ..., U23, and U24 having 4 rows and 6 columns, and each holding unit is arranged in a matrix. Each holding unit is provided with a square opening 11 and a holding frame portion 12 which is a portion other than the opening when viewed from the main surface (upper surface) of the frame portion (FIG. 2). A recess 14 is provided between the outer edges of the fitting portions 12 of the adjacent holding units. Further, a drain hole 16 is provided at an arbitrary position on the boundary of each unit.
In another example shown in FIGS. 4 to 6, similarly to the examples of FIGS. 1 to 3, the frame portion 1 is composed of holding units U1, U2, ..., U23, U24 having 4 rows and 6 columns, and each holding unit is They are arranged in a matrix. When viewed from the main surface (upper surface) of the frame portion (FIG. 5), each holding unit surrounds the square opening 11, the holding frame portion 12 which is a portion other than the opening, and the outer edge of the opening 11. A fitting portion 13 is provided. A recess 14 is provided between the outer edges of the fitting portions 12 of the adjacent holding units. Further, four handles 15 are provided at each end of the frame portion 1, and drain holes 16 are provided at arbitrary positions on the boundary of each unit.
In the examples described later, the container holder shown in FIG. 1 is used, and the sizes of the respective parts are as follows. The area of the opening 11 is 31.3 cm ² , and the maximum diameter is 5.6 cm. The width of the groove of the fitting portion 13 is 3 mm, and the depth is 1 mm. The width of the recess 14 is 1.1 cm and the depth is 8 mm. The size of the frame portion 1 is 30 cm in length, 45.3 cm in width, and 1.7 cm in thickness when viewed from the main surface.

The opening does not have to be substantially rectangular as shown in FIGS. 1 to 6, and may be circular, for example, as shown in FIGS. 7 to 8. Further, as shown in FIGS. 4 to 6 and 8, the width of the fitting portion does not have to be constant and may be provided on the outer edge of the opening. For example, as shown in FIGS. 7 and 9, the shape may be a substantially square shape with a hollow or a substantially circular shape with a hollow when viewed from the main surface.

(Support part)
The support portion is a portion that supports the frame portion, and when the container holder is placed on the ground plane, it is located between the frame portion and the ground plane and supports the frame portion substantially horizontally. The support part horizontally supports the seedling raising container for short.

The support portion usually has a bottom frame portion and a support portion. The bottom frame portion is a portion that comes into contact with the ground when the container holder is placed on the ground surface, and is preferably opened to the ground surface. This facilitates water absorption and drainage from the bottom of the seedling raising container, and the weight of the container holder can be reduced. In addition, the opening of the bottom surface of the container holder improves air permeability and promotes air root cutting of roots extending from seedlings. The strut portion is a combination of strut extending from the holding frame portion to the bottom frame portion. It is preferable that the bottom frame portion and the strut portion are provided for each holding unit. As a result, the strength of the container holder can be increased, and even if the seedling raising period elapses and the seedlings grow large and the overall weight increases, the frame portion can be supported in a more horizontal state.

The size of the support portion is preferably a size that allows the seedling raising container to be held without the bottom portion touching the ground. It can be selected according to the size of the target seedling raising container, but for example, the distance of the frame portion from the ground plane may be adjusted to a distance of usually 14 cm or more, preferably 15 cm or more, and more preferably 16 cm or more. preferable. The upper limit is not particularly limited, and is usually 20 cm or less.

The support portion will be described by taking FIGS. 1 to 6 as an example. In both the examples shown in FIGS. 1 to 3 and the example of the support portion 2 shown in FIGS. 4 to 6, the support column portion 21 extends from the back surface of the holding frame portion 12 of the frame portion 1 toward the ground plane, and the bottom surface frame portion 22 Connect to. The column portion 21 and the bottom frame portion 22 are provided for each of the holding units U1 to U24, and are composed of four columns 21A, 21B, 21C, and 21D, respectively. The bottom frame portion 22 has a bottom opening 23 at the center thereof.

The material of the container holder is not particularly limited, but the forest seedlings are usually hard materials because the seedling raising period is long and durability is required, and thermoplastic resins (eg polypropylene, polyethylene, polystyrene, polyvinyl chloride), etc. , A rigid material that can be thermoformed is preferable. As a result, the container holder can be integrally molded and easily manufactured. Also, biopolyester, bacterial cellulose, microbial polysaccharides (eg, pullulan, curdran), casein, modified starch, polycaprolactone, polybutylene succinate, polyethylene succinate, polyethylene terephthalate succinate, polybutylene adipate terephthalate, polyglycolic acid, Biodegradable resins such as polylactic acid, polyvinyl alcohol, polyurethane, nylon oligomers, poly (3-hydroxybutyrate-co-3-hydroxyhexanoate), polybutylene succinate adipate, and polyhydroxyalkanoate are also environmentally safe. It is preferable from the viewpoint of.

[2. Seedling raising container targeted by container holders]
As the seedling raising container targeted by the container holder of the present invention, it is preferable to use a tubular seedling raising container having a continuous collar on the outer edge of the upper end opening of the seedling raising hole. The seedling raising container may be either a stand-alone seedling raising container or a connected seedling raising container. The stand-alone seedling raising container is a seedling raising container having a single seedling raising hole, and the connected type container is a seedling raising container in which a plurality of containers are connected.

The collar portion of the seedling raising container is continuously provided on the outer edge of the opening at the upper end of the seedling raising hole, and has a shape that projects substantially at right angles to the outer wall of the container holder. When the container holder has a fitting portion, it is preferable that the collar portion of the seedling raising container has a size that can be substantially fitted to the fitting portion of the container holder. The seedling raising container may have a tubular shape, but in order to use it for the container holder of the present invention, it is required that the size other than the collar portion fits into the opening of the holding unit of the container holder. On the other hand, the size (height, opening size) of the seedling raising container is not particularly limited as long as the collar and the overall size satisfy the above conditions. That is, two or more seedling raising containers having different heights may be used for raising seedlings at the same time (see, for example, FIG. 4), whereby a seedling raising container can be selected according to the growth conditions of the individual seedlings and the tree species.

The seedling raising container can be used in combination with different sizes (capacity, height, etc.), and the container with the optimum capacity can be selected according to the tree species.
The height of the seedling raising container may be such that the bottom surface of the seedling raising container does not touch the ground when the seedling raising container is attached to the container holder, and is usually 18 cm or less, preferably less than that, and more preferably 16 cm or less. It is usually 7.5 cm or more, preferably 9.5 cm or more, and more preferably 12.5 cm or more.

The seedling raising container may have a bottom opening provided with a soil holding frame, ribs and slits which may be provided on the inner side surface of the seedling raising hole, and the like, which may be optionally provided by the forest seedling raising seedling container, and at least one of these may be provided. It is preferable to have, and it is more preferable to have at least a bottom opening. As a result, air root cutting can be performed efficiently. The size, shape, and number of these parts may vary from container to container. The hilling holding frame may be connected to the bottom opening at a plurality of places.

A preferable example of the tubular seedling raising container will be described by taking FIGS. 11 to 14 as an example. In the seedling raising container 3 of FIGS. 8 to 10, the seedling raising hole 31 has a substantially square opening 32, and a flange portion 33 is provided at the upper end of the opening. The outer shape of the seedling raising container 3 is tapered from the upper end to the bottom surface, and the outer wall thereof is provided with four reinforcing grooves 34 (two back surfaces are not shown). The bottom surface 35 has a bottom surface opening 37 provided with a hilling holding frame 36. Eight ribs 38 extending from the opening toward the bottom surface are provided on the inner surface of the nursery hole 31. The hilling holding frame 36 includes a hollow frame 36A and connecting portions 36B1 to 36B4 radially protruding from the frame 36A. The connecting portions 36B1 to 36B4 of the hilling holding frame are connected to the end portions 37A to 37D on the bottom surface. As a result, almost the entire bottom surface of the bottom opening is partitioned by a soil holding frame. Since the bottom opening 37 and the ribs promote air root cutting, seedling raising efficiency can be improved.

Examples of the material of the seedling raising container and preferable examples are the same as those of the material of the container holder and the preferable examples, and may be the same as the material of the container holder.

[3. Seedling kit]
The container holder of the present invention may form a seedling raising kit together with the above-mentioned plurality of seedling raising containers. The plurality of seedling raising containers are preferably two or more seedling raising containers having different sizes, sizes, and the like. The seedling raising kit may further include those commonly used in the production of forest seedlings, such as soil and fertilizer. Examples of the hilling soil include natural soil such as sand and soil (eg, Akadama soil, Kanuma soil). Other examples of supports include artificial soils such as paddy husk charcoal, coconut fiber, vermiculite, perlite, peat moss, glass beads; porous moldings such as foamed phenolic resins, rock wool; solidifying agents (eg, agar or gellan gum). ), And at least one selected from these may be replaced with natural soil or used together with natural soil. The fertilizer may be either a fast-acting fertilizer or a slow-acting fertilizer, or may be an inorganic fertilizer, an organic fertilizer or a chemical fertilizer. The seedling raising kit may further contain plant materials such as seedlings, seeds, cuttings, rooted seedlings and the like.

[4. Forest seedling production method]
The container holder and seedling raising kit of the present invention are preferably used for the production of forest seedlings. The production method of forest seedlings will be explained below with an example. The production method of forest seedlings is the planting process of planting the seeds, seedlings, cuttings or rooted seedlings of the forest seedlings in the nursery hole of the nursery container, the mounting process of attaching the seedling raising container to the container holder, and the soil filling process of filling the seedlings with the soil. It can be divided into a seedling raising process for growing seedlings and an air root cutting process for air root cutting. The order of the steps is not particularly limited, and the planting step and the soil filling step may be performed simultaneously or sequentially after the mounting step is performed first, or the planting step and the mounting step may be performed after the soil filling step is performed first. May be performed sequentially. The implementation conditions of each process are not particularly limited, and it may proceed under the conditions performed by the normal production method of forest seedlings, but in the hilling filling process, the hilling is loaded on the upper surface of the frame and the container holder is vibrated to cultivate the soil. It is preferable to drop the soil into the seedling raising hole and scrape off the soil that has not fallen into the seedling raising hole. As a result, a plurality of seedling raising containers can be easily filled with soil in a short time, and workability can be improved. Further, the air root cutting step is preferably carried out at least during the period after rooting of the seedling raising step, and may be carried out during the entire period.

In the seedling raising step, it is preferable to carry out a sorting step of sorting the seedlings according to size in the middle. As a result, it is possible to easily perform operations such as changing to the optimum conditions according to the seedling raising conditions such as the tree species and the growing ability of the seedlings, and thinning out the individuals having low growing ability. Sorting includes, for example, classifying seedlings into two or more groups according to size and moving at least one group of seedling raising containers. The destination may be another container or another unit in the same holder. Seedlings are classified into two or more groups according to size, one group is copied to a part of a container, and the other group is transferred to another container. Examples of the size include seedling weight, seedling height, and trunk diameter. As the criteria for sorting, the criteria for sorting may be the average value of a plurality of seedlings or the standard value of each tree species. The time for sorting is preferably the first half of the seedling raising period (from the time of planting to the time when seedling raising is completed), 2 to 5 months after planting (preferably 3 to 4 months later), or 1 / of the seedling raising period. It is preferable that the time has passed 5 to 1/3.
The air root cutting step is a step of performing an air root cutting process for forest seedlings. The air root cutting treatment is a treatment for stopping the growth of roots that have come out into the air from the opening (for example, the bottom opening, the slit on the side surface) of the seedling raising container. This makes it possible to suppress root deformation (so-called root wrapping, etc.) inside the seedling raising container. The air root cutting step may be carried out while observing the degree of growth of the forest seedlings (preferably the degree of root growth after rooting), or immediately after the planting step, in the entire period of the seedling raising step, in the future. Air root cutting treatment may be performed in preparation for root deformation.

Example 1
In February 2018, Sugi seeds were sown in a nursery box filled with sowing soil. Sugi seedlings germinated in March of the same year were replanted in a stand-alone seedling raising container (Fig. 11) filled with container seedling raising seedling cultivation soil (manufactured by Top Co., Ltd.). The stand-alone seedling raising container in which the seedlings were planted was placed in a container holder (Fig. 1) capable of holding 24 containers per sheet. At that time, a space of about 3.5 cm was provided between the stand-alone seedling raising container and the ground.

Soil was placed on the entire container holder, and the container holder was shaken to fill the container with soil. Furthermore, the soil remaining on the upper part of the container holder was scraped off. The time from setting the stand-alone seedling raising container in the container holder to filling the soil was measured.

After replanting, the seedlings were placed on a pallet (1100 × 1100 × 150 mm) installed in the open field and raised for 3 months. In June of the same year, the amount of growth of each individual was investigated and sorted by size. That is, seedlings having a seedling height of 20 cm or more and seedlings having a seedling height of 20 cm or less were sorted. That is, two container holders (same as above, shown in FIG. 1) are prepared, one is for collecting containers for seedlings with a seedling height of 20 cm or more, and the other is for collecting containers for seedlings with a seedling height of 20 cm or less. It was.

After that, seedlings were raised until March 2019, air root cutting was performed, and the seedling yield rate was evaluated. In the evaluation of air root cutting, the bottom surface of the container was visually confirmed, and if the roots were not wound, it was measured as an individual with air root cutting.

Regarding the seedling yield rate, the number of individuals satisfying the seedling height of 30 to 45 cm and the root diameter of 3.5 mm or more was measured as the number of seedlings, and the number of seedlings obtained with respect to the number of seedlings raised was calculated as the seedling rate (%).

Example 2
It was carried out in the same manner as in Example 1 except that the tree species to be raised was black pine.

Comparative Example 1
A connected container (Rieco multi-cavity container: hole diameter 7 cm, hole height 10 cm, hole size about 311 cc, number of holes in one case, 15 holes, made of plastic) was used for the seedling raising container, June 2019. It was carried out in the same manner as in Example 1 except that the sorting by size was not performed in a month.

Comparative Example 2
The same connected container as in Comparative Example 1 was used as the seedling raising container, and the same procedure as in Example 2 was carried out except that the seedlings were not sorted by size in June 2019.

Table 1 shows the implementation conditions and results of Examples 1 and 2 and Comparative Examples 1 and 2.

Example 3
First, 24 stand-alone containers were set in the container holder. Next, the soil was placed on the entire container holder, and the container holder was shaken to fill the container with the soil. Furthermore, the hilling remaining on the upper part of the container holder was scraped off. The time from setting the stand-alone container in the container holder to filling the soil was measured. As the hilling soil, the same hilling soil used in Example 1 was used.

Comparative Example 4
First, the soil was put into the container with a shovel from the upper end opening of the stand-alone container. The container was then tapped to eliminate voids in the container. Further, the soil was filled into the container with a shovel from the opening at the upper end of the container. Twenty-four same stand-alone containers were sequentially filled with soil according to the above procedure, and the time required to complete filling all the containers with soil was measured.

The table shows the implementation conditions and results of Example 3 and Comparative Example 4.

As is clear from Table 1, in Examples 1 and 2 in which the stand-alone container is attached to the container holder and used, sorting and efficient air root cutting are performed as compared with Comparative Examples 1 and 2 in which the connected container is used. The seedling yield rate was high. Further, as is clear from Table 2, in Example 3 in which the stand-alone container was attached to the container holder and used, the soil could be filled earlier than in Comparative Example 3 in which the same number of stand-alone containers were used alone. It was. These results indicate that according to the present invention, forest seedlings can be efficiently produced, the seedling yield rate can be improved, and workability during seedling raising can also be improved.

1 frame part, 11 opening, 12 holding frame part, 13 fitting part, 14 recess, 15 handle, 16 draining hole 2 support part, 21 strut part, 22 bottom frame part, 23 bottom opening U1 to U24 holding unit 3 seedling raising container, 31 seedling raising hole, 32 opening, 33 collar, 34 reinforcement groove, 35 bottom, 36 soil holding frame, 37 bottom opening, 38 ribs

Claims (16)

A container holder for raising seedlings in a forest that detachably holds a tubular seedling raising container having a continuous collar on the outer edge of the upper end opening of the seedling raising hole.
A flat frame consisting of multiple holding units and
The seedling raising container mounted on the frame part is provided with a support part that supports the seedling raising container substantially horizontally without the bottom part touching the ground.
The holding unit has a holding frame portion that surrounds an opening having a size that allows the seedling raising container to enter but the collar portion cannot enter.
Container holder for raising seedlings in forests. The forest seedling raising container according to claim 1, wherein the holding unit is a groove continuously provided on the outer edge of the opening and further has a fitting portion into which the saliva portion is substantially fitted when the seedling raising container is attached. holder. The container holder according to claim 1 or 2, wherein a plurality of holding units are arranged in a matrix on the frame portion when viewed from the main surface. The container holder according to any one of claims 1 to 3, wherein the opening of the holding unit has a substantially rectangular shape. The container holder according to any one of claims 1 to 4, wherein the support portion has a bottom frame portion that opens to a ground plane and a strut portion that extends from the holding frame portion to the bottom frame portion. The container holder according to any one of claims 1 to 5, wherein the seedling raising container is a stand-alone seedling raising container. The holding unit is provided in a part of the holding frame portion adjacent to the outer edge of the fitting portion, and has a recess which is a recess into which a finger can be inserted when taking out the seedling raising container mounted on the frame portion. The container holder according to any one of 1 to 6. The container holder according to any one of claims 1 to 7, and the container holder.
A seedling raising kit containing a plurality of combinations of tubular seedling raising containers having a collar on the outer edge of the opening on the upper surface of the growing hole. The holding unit of the container holder is a groove continuously provided on the outer edge of the opening, and further has a fitting portion into which the saliva portion is substantially fitted when the seedling raising container is attached.
The seedling raising kit according to claim 8, wherein the collar portion of the seedling raising container has a size that can be substantially fitted to the fitting portion of the container holder. The seedling raising kit according to claim 8 or 9, wherein the plurality of seedling raising containers include two or more kinds of seedling raising containers that are different from each other. The seedling raising kit according to any one of claims 8 to 10, wherein the plurality of seedling raising containers include a stand-alone seedling raising container. The seedling raising kit according to any one of claims 8 to 11, further comprising at least one selected from the group consisting of hilling and fertilizer. A method for producing a forest seedling, which comprises raising a forest seedling using the seedling raising kit according to any one of claims 8 to 12. Mounting process to mount the seedling raising container on the container holder,
Planting process of planting seeds, seedlings, cuttings or rooted seedlings of forest seedlings in the nursery holes of the nursery container,
Cultivation soil filling process, which fills the seedling raising holes
The method for producing forest seedlings according to claim 13, further comprising a seedling raising step of growing seedlings and an air root cutting step of cutting air roots. According to claim 13 or 14, in the soil filling step, the soil is loaded on the upper surface of the frame portion, the container holder is vibrated to drop the soil into the seedling raising hole, and the soil that has not fallen into the seedling hole is dropped by scraping. The described method for producing forest seedlings. The method for producing forest seedlings according to any one of claims 13 to 15, further comprising a sorting step of sorting seedlings according to size in the middle of the seedling raising step.

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