JP2023055003A - Method of raising sweet potato seedlings - Google Patents

Abstract

To provide a method of raising sweet potato seedlings that can reduce the burden on workers and minimize the damage caused by epidemics.SOLUTION: A method of raising sweet potato includes a preparation process, a soi-filing process, a planting process, a sprouting process, and a seedling cutting process. In the preparation process, a large container 1 having a size facing a worker is prepared. In the soil-filling process, soil is put into the large container 1. In the planting step, the worker places the seed tubers on an upper surface of the soil of the container 1 in which the soil has been put. As a result, the worker can perform the work of laying the seed tubers down on the soil in the container 1 in a standing state without crouching down. Moreover, even if an epidemic occurs in the seed potatoes, the range of influence can be suppressed to within the container 1 concerned.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to a method for raising sweet potato seedlings.

Conventionally, in the cultivation of sweet potatoes, a method of germinating seed potatoes, cutting the germinated seedlings, and planting them in fields has been performed. In addition, various methods for cultivating sweet potatoes using seed potatoes have been proposed (see, for example, Patent Document 1 below).

As a general conventional method for cultivating sweet potatoes, an operator first lays down a seed potato in a seedling-raising field provided outdoors, and germinates a seedling from the laid down seed potato. Then, after growing the seedling to a certain size, the seedling is cut, and the cut seedling is planted in a field for cultivation.

JP 2011-217611 A

In the above-described conventional method, there is a problem that the work burden on the operator is heavy. Specifically, since the worker works on the ground (alley) when putting down the seed potato, it is necessary to maintain a crouching posture for a long time while working. Such work places a heavy burden on the worker's body, and in particular, when the elderly work, it causes an excessive burden. Furthermore, the work of cutting seedlings that have sprouted from seed potatoes has caused a similar physical burden.

In addition, since the seed potatoes are evenly laid down in the field, if an epidemic such as root rot occurs, it may spread over a wide area through the soil, causing serious damage. It was.

The present invention has been made in view of the above circumstances, and aims to provide a method for raising sweet potato seedlings that can reduce the burden on workers and minimize the damage of late blight. .

(1) A method for raising sweet potato seedlings according to the present invention is a method for raising sweet potato seedlings including a preparation step, a soil-filling step, a subjugation step, a sprouting step, and a seedling cutting step. In the preparation step, a box-shaped agricultural container is prepared, which is a large container that faces a worker when placed on the ground, has an upper surface formed as an opening, and has a housing space formed therein. In the soil-filling step, soil is put into the housing space of the prepared agricultural container. In the subduing step, seed potatoes of sweet potatoes are subdued on the upper surface of the soil in the agricultural container in which the soil has been put. In the sprouting step, seed potatoes that have been put down are sprouted, and the sprouted seedlings are grown. In the seedling cutting step, the seedling is separated from the seed potato.

According to this method, when raising sweet potato seedlings, first, a large agricultural container facing a worker is prepared, and soil (soil) is put into the agricultural container. Then, the worker puts the seed potato down on the upper surface of the soil of the agricultural container in which the soil has been put.

Therefore, the worker can perform the work of laying the seed tubers down on the soil in the agricultural container in a standing state without crouching down.

As a result, the process of working for a long time while maintaining a squatting posture can be improved, and work can be performed in a less burdensome posture. Therefore, the burden (physical burden) on the worker can be reduced.

Also, when seedlings germinate and grow from the laid seed potatoes, the operator separates the seedlings from the seed potatoes. Also at this time, the worker can cut off the seedling from the seed potato in the agricultural container in a standing state without squatting down.

Therefore, the process of working for a long time while maintaining a squatting posture can be improved, and the work can be performed in a less burdensome posture. Therefore, the burden (physical burden) on the worker can be reduced.

Also, the seed tubers are laid down on the upper surface of the soil put into the agricultural container.
Therefore, even if an epidemic occurs in the laid-down seed tubers, the range of influence can be suppressed within the agricultural container.

Specifically, the soil for raising the seedlings is put into the storage space (the storage space of the agricultural container), which is a partitioned space, and is separated from the outside (separated). As a result, even if an epidemic occurs, the range of epidemic transmission can be suppressed within the agricultural container in which the seed tuber is hidden.
Therefore, it is possible to minimize the damage caused by epidemics.

(2) In the method for raising sweet potato seedlings, the capacity of the accommodation space of the agricultural container may be 0.60 to 2.40 cubic meters.

According to such a method, the agricultural container can be configured in a size suitable for the work.
Therefore, the worker can work on the agricultural container in a less burdensome posture.

(3) Further, in the sweet potato seedling growing method, the agricultural container is formed with an engaging portion for inserting a fork of a forklift, and is transported by lifting the engaging portion by the fork of the forklift. It may be a large container.

According to such a method, the agricultural container can be constructed in a large size suitable for working. A forklift can also be used to transport agricultural containers.
Therefore, it is possible to further reduce the burden on the operator.

(4) In the sweet potato seedling growing method, in the soil filling step, the top surface of the soil placed in the agricultural container is positioned between 50 and 110 cm from the installation surface. , the agricultural container may be loaded with soil.

According to such a method, the top surface of the soil put into the agricultural container can be arranged at a position (height) that facilitates work for the worker.
Therefore, the worker can work on the agricultural container in a less burdensome posture.

(5) In addition, the method for raising sweet potato seedlings may further include a bottom-raising step. In the bottom raising step, the agricultural container prepared in the preparation step is raised so that the bottom portion of the housing space is positioned upward. In the soil-filling step, soil may be put into the housing space whose bottom has been raised.

According to such a method, the amount of soil to be put into the agricultural container can be reduced.
Therefore, it is possible to simplify the work of putting soil into the agricultural container (it is possible to reduce the work load when putting soil in).

In addition, it is possible to prevent the weight of the agricultural container after the soil from becoming too large.
Therefore, it is possible to reduce the work load when moving the agricultural container after the laying-down process is completed.

(6) Further, in the sweet potato seedling raising method, in the subduing step, a plurality of seed potatoes may be pressed down in a dense state so that adjacent seed potatoes are in close contact with each other on the upper surface of the soil in the agricultural container.

According to such a method, the total amount of germinated seedlings can be increased, and the yield of seedlings can be increased.

In addition, in a general sweet potato seedling raising method, a certain distance is provided as a distance between adjacent seed potatoes so that when an epidemic occurs, it is difficult for the epidemic to spread.

On the other hand, in the method of the present invention, the soil for raising the seedlings is put into the storage space (the storage space of the agricultural container), which is a partitioned space, and is separated from the outside (separated). Therefore, even if an epidemic occurs in a state in which a plurality of seed potatoes are densely laid down, the range of epidemic transmission can be suppressed within the agricultural container in which the seed potatoes are laid down.

That is, according to the method of the present invention, it is possible to increase the yield of seedlings while minimizing the damage caused by late blight.

(7) In the sweet potato seedling raising method, a plurality of agricultural containers may be prepared in the preparing step. In the soil loading step, soil may be loaded into each of the plurality of agricultural containers. In the subduing step, seed potatoes of sweet potatoes may be subdued on the upper surface of the soil of each of the plurality of agricultural containers in which soil has been put. In the sprouting step, the plurality of agricultural containers in which the seed potatoes are laid down may be stored in a vertically stacked state.

According to such a method, a large number of agricultural containers can be stored with effective use of space.
Therefore, the number of agricultural containers used in the sweet potato seedling raising method can be increased. As a result, the yield of seedlings can be increased.

According to the present invention, the burden on workers can be reduced. In addition, it is possible to minimize the damage caused by epidemics.

1 is a perspective view showing a container used in a sweet potato seedling-raising method according to an embodiment of the present invention. FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is the flowchart which showed the flow of the seedling-raising method of the sweet potato which concerns on one Embodiment of this invention. FIG. 4 is a side cross-sectional view showing a state in which the bottom raising member is put into the container; Fig. 3 is a side cross-sectional view showing a state in which soil is put into a container; Fig. 3 is a plan view showing a state in which seed potatoes of the sweet potato are laid down on the soil in the container. FIG. 4 is a side cross-sectional view showing a state in which a plurality of containers are stacked; Fig. 3 is a side cross-sectional view showing a container in which seedlings sprouted from seed potatoes have grown. FIG. 10 is a side cross-sectional view showing a modification of the method for raising the bottom of the container;

1. 1. Overall Configuration of Container FIG. 1 is a perspective view showing a container 1 used in a sweet potato seedling-raising method according to an embodiment of the present invention.

As shown in FIG. 1, the container 1 is an agricultural container, and is a large-sized container facing a worker when installed on the ground. Specifically, the container 1 is generally a large container used for containing harvested agricultural products, and is shaped like a box. The container 1 is a metal container made of iron, steel, or the like, and is generally called an iron container, a steel container, a mesh container, or the like.

The container 1 is formed in the shape of a box with an open top, and has a rectangular shape in a plan view with a dimension in the width direction that is larger than the dimension in the front-rear direction. The container 1 comprises a frame 2, a support frame 3 and a plurality of meshes 4.

The frame 2 is a member constituting a framework of a foundation provided at portions corresponding to each side of the box. A lower portion of the front portion of the frame 2 serves as an engaging portion 30 . The engaging portion 30 is for inserting a fork 50 (see FIG. 3) of a forklift. Specifically, a plurality of openings 31 are formed in the engaging portion 30 . In this example, the engaging portion 30 is formed with three laterally long openings 31 arranged in the width direction. As will be described later, a forklift is used to transport the container 1 . At that time, a fork 50 of a forklift (claw for cargo handling vehicle) is inserted from the front side into the engaging portion 30 (opening 31) to lift the container 1 (see FIG. 3).

A support frame 3 is provided on the box-shaped side portion and bottom portion formed by the frame 2 . The support frame 3 is an auxiliary frame provided on the frame 2 . A mesh 4 is attached to the support frame 3 (the bottom portion is not shown). Further, the box-shaped upper surface portion formed by the frame 2 is opened as an opening 5 (the upper surface of the container 1 is formed as the opening 5). A space inside the container 1 is partitioned as a storage space 6 .

The size (dimension) L1 in the width direction of the container 1 is 120 to 185 cm, preferably 150 to 180 cm, more preferably 165 to 175 cm.

The longitudinal size (dimension) L2 of the container 1 is 85 to 130 cm, preferably 90 to 120 cm, more preferably 90 to 110 cm.

The height (vertical dimension) L3 of the container 1 is 65 to 145 cm, preferably 70 to 100 cm, more preferably 75 to 90 cm.

The volume (capacity) of the space inside the container 1 (accommodation space 6) is, for example, 0.60 to 2.40 cubic meters, preferably 0.70 to 1.50 cubic meters, more preferably 0 .90 to 1.20 cubic meters.

When a worker with a general height (150 to 170 cm tall) faces the container 1 in a standing state, the side portion of the container 1 faces the worker as shown in FIG. are doing. Specifically, when the operator stands and faces the operator, the height (position in the height direction) of the upper end of the container 1 is from the height (position) of the waist of the operator to the height (position) of the chest (position). ) is located between

The structure of the container 1 is formed in the shape of a box with an open top, and it may be a large size that faces the operator when installed on the ground, and the shape of each member is various. can be changed to

2. Seedling Raising Method (1) Flow of Seedling Raising Method FIG. 2 is a flow chart showing the flow of a sweet potato seedling raising method according to an embodiment of the present invention. In the sweet potato seedling-raising method of the present invention, first, a large container 1 is prepared (preparation step: step S101). Specifically, first, a large container 1 is installed at a place where workers work (see FIG. 1). At this time, a plurality of containers 1 are installed. In addition, the transportation of the container 1 at this time is performed using a forklift.

Next, the operator raises the bottom of each container 1 so that the bottom of the accommodation space 6 in each container 1 is positioned upward (bottom raising step: step S102).

Then, the worker puts soil (soil) for raising seedlings into each container 1 (accommodating space 6) whose bottom is raised (soil adding step: step S103). Next, the operator lays down the sweet potato seed potatoes in the soil in each container 1 (putting down step: step S104). A plurality of containers 1 in which the seed potatoes are laid down are moved to a location with environmental conditions suitable for growing sweet potato seedlings, and stacked vertically at that location (step S105). Then, the container 1 in this state is stored for a certain period of time (step S106). During this time, seed potatoes put down in each container 1 germinate, and the germinated seedlings grow (germinating step).

Each stacked container 1 is then lowered to the ground. Then, each container 1 is stored for a certain period of time in an environment different from the sprouting process. During this time, the seedlings germinated from each container 1 grow further (growing step: step S107). After that, the grown seedling is separated from the seed potato (seedling cutting step: step S108). Thus, sweet potato seedlings are harvested. The harvested seedlings are planted in fields for cultivation.

After that, the operations of steps S107 and S108 are repeated. That is, the growing step and seedling cutting step are repeated multiple times for one seed potato. Then, the seed potatoes after cutting seedlings a plurality of times are reused as compost.

(2) Specific procedure Hereinafter, the method for raising sweet potato seedlings will be described in detail with reference to the drawings.
FIG. 3 is a side sectional view showing a state in which the bottom raising member 10 is put into the container 1. As shown in FIG. As described above, in the sweet potato seedling-raising method of the present invention, first, a plurality of containers 1 are prepared as a preparation step. After that, the operator raises the bottom of each container 1 so that the bottom of the accommodation space 6 in each container 1 is positioned upward as a bottom raising step.

Specifically, as shown in FIG. 3 , the operator puts the bottom raising member 10 into the accommodation space 6 of the container 1 . The bottom-raising member 10 can be put into the container 1 and occupies a part of the container 1, and a member such as a pallet can be used. In this example, a small plastic box-shaped member 11 and a sheet 12 are used as the bottom raising member 10 .

A worker first arranges a plurality of box-shaped members 11 inside the container 1 (accommodation space 6). Specifically, the operator first arranges the plurality of box-shaped members 11 on the bottom surface of the container 1, and then arranges the plurality of box-shaped members 11 thereon. Moreover, when further raising the bottom is required, a plurality of box-shaped members 11 are further stacked. Note that the box-shaped member 11 may have one step depending on the degree of raising the bottom. Then, a sheet 12 is put on the stacked box-shaped members 11 so as to cover the upper surfaces thereof. In this manner, the inside of the container 1 is raised by the bottom raising member 10 (the box-shaped member 11 and the sheet 12).

In this way, the bottom of the storage space 6 is pushed upward (the bottom of the storage space 6 is positioned upward), and the space above the bottom-raising member 10 (above the seat 12) in the container 1 becomes the storage space 6. becomes. When the bottom-raising member 10 is put into the container 1, the container 1 has a bottom-raising area (bottom-raising space) on the lower side where the bottom-raising member 10 is arranged and an area above the bottom-raising member 10 (above the bottom-raising area). It is divided into the accommodation space 6 located in .

The height of the top surface of the bottom-raising member 10 (the height of the top surface of the bottom-raising member 10 after the bottom-raising member 10 is placed in the container 1) is 20 to 70 cm, preferably 30 to 60 cm, more preferably 30 to 60 cm. , 40-50 cm.

FIG. 4 is a side sectional view showing a state in which soil is put into the container 1. As shown in FIG.
After the above-described bottom-raising step, as shown in FIG. 4, seedling-raising soil (soil) is put into the container 1 (housing space 6) (soil-filling step).

When soil is put into the container 1, the height L4 to the top surface of the soil is 50 to 110 cm, preferably 60 to 90 cm, more preferably 70 to 80 cm. As a result, the position (height) of the upper surface of the soil becomes the height of the worker's waist.

In addition, when the soil is put into the container 1, the position of the top surface of the soil (the position in the height direction) is a state in which a worker with a general height (150 to 170 cm tall) faces the container 1. It is positioned between the height (position) of the waist of the worker and the height (position) of the chest of the worker (in a state where the worker stands and faces each other).

FIG. 5 is a plan view showing a state in which seed potatoes A of sweet potatoes are laid down on the soil in the container 1. As shown in FIG.
After the soil-filling step described above, as shown in FIG. 5, the worker lays down the sweet potato seed potato A into the soil in the container 1 (lowering-down step).

Specifically, the worker arranges a plurality of seed potatoes A on the upper surface of the soil in the container 1 so that the length direction (longitudinal direction) of the seed potatoes A is along the width direction of the container 1 . At this time, the operator spreads a plurality of seed potatoes A densely on the soil surface (arranged in a dense state).

Specifically, the operator places a plurality of seed potatoes A on the upper surface of the soil in a dense state so that the adjacent seed potatoes A (the seed potatoes A adjacent in the front-rear direction and the seed potatoes A adjacent in the width direction) are in close contact with each other. Arrange in

At this time, the distance (dimension) between the adjacent seed potatoes A in the front-rear direction (lateral direction of the seed potato A: left-right direction in FIG. 5) is smaller than the thickness of one seed potato A (diameter of the seed potato A). Specifically, the distance (dimension) between adjacent seed potatoes A in the front-rear direction (horizontal direction in FIG. 5) is 1 to 5 cm, preferably 1 to 3 cm, more preferably 1 to 1 cm. .5 cm.

In addition, the distance (dimension) between adjacent seed potatoes A in the width direction (longitudinal direction of seed potatoes A: vertical direction in FIG. 5) is 3 to 10 cm, preferably 3 to 7 cm, more preferably 3 to 5 cm.

After arranging a plurality of seed potatoes A in the container 1 in this manner, the worker covers the upper surfaces of the various potatoes A with soil so that the various potatoes A are covered with soil. Thus, the laying down process is completed.

FIG. 6 is a side sectional view showing a state in which a plurality of containers 1 are stacked.
After the above-described laying-down process, the plurality of containers 1 are moved to a place where environmental conditions are suitable for raising sweet potato seedlings, and are vertically stacked there (see FIG. 6).

In addition, the movement of the container 1 is performed using a forklift. Specifically, when transporting the containers 1, stacking the containers 1, and lowering the stacked containers 1, the containers 1 are moved using a forklift. At that time, the fork 50 of the forklift is inserted into the opening 31 of the engaging portion 30 from the front side (see FIG. 3). Then, the container 1 is lifted by a forklift (forks 50) and moved (transported) to a predetermined location.

In this example, the container 1 that has completed the laying down process is moved into a warehouse where temperature and humidity can be controlled. Then, they are stacked vertically and stored in the warehouse.

At this time, the humidity in the warehouse (the humidity of the air around the container 1) is kept constant (high humidity). Also, the temperature in the warehouse (the temperature of the air around the container 1) is kept constant. By managing the container 1 in the warehouse in this way, the temperature and humidity of the air around the seed potato A can be kept constant without being affected by the outside air. As a result, the seedling can be grown in a short period of time, and variations in the growth period can be suppressed.
Then, it is stored in this state for a certain period of time (for example, 5 to 7 days). During this period, seed potatoes A germinate and seedlings grow (germination step).

When the sprouting process is completed, the stacked containers 1 are lowered to the ground, and each container 1 is stored for a certain period of time in an environment different from the sprouting process (growing process). Examples of the growing process include a method of moving the container 1 to a greenhouse and storing it in the greenhouse for a certain period of time, and a method of storing outdoors when the outside temperature is 15° C. or higher. The duration of the growing process is, for example, 1 to 3 months. Also, in the growing process, a horizontally extending irrigation tube is provided near the container 1 at a predetermined height. Water is supplied to the container 1 from this tube. In this way, after the sprouting step, the seedling is further grown (grows) by moving to a different environment and performing the growing step.

FIG. 7 is a side cross-sectional view showing the container 1 in which seedlings sprouted from seed potatoes A have grown.
After the growing process described above, the grown seedling is separated from the seed potato A as indicated by the broken line in FIG. 7 (seedling cutting process). The harvested seedlings are planted in fields for cultivation.

In the seedling cutting process, for example, a plurality of containers 1 are arranged along one direction, and a rail (not shown) extending in one direction (parallel to the direction in which the containers 1 are arranged) is provided above them. A box is provided on the rail, and the seedling cut off from the seed potato A is placed in this box. Boxes containing seedlings are moved along rails and then collected at a predetermined location. By transporting seedlings using rails in this manner, the burden on workers in the seedling cutting process can be further reduced.

After that, as described above, one seed potato A is repeatedly subjected to the growing process and seedling cutting process multiple times. Further, nutrients such as compost are supplied into the container 1 each time the seedling cutting process is completed. As a result, even when the soil in the container 1 is small, the seed potato A can be provided with sufficient nutrients.

3. Effect (1) According to the present embodiment, the method for raising sweet potato seedlings includes a preparation process, a soil-filling process, a subjugation process, a sprouting process, and a seedling-cutting process. Specifically, first, as shown in FIG. 3, a large container 1 having a size facing a worker is prepared. Then, as shown in FIG. 4, the container 1 is filled with soil (soil). Next, as shown in FIG. 5, the worker puts the seed potato A down on the upper surface of the soil of the container 1 in which the soil is put.

Therefore, the worker can perform the work of laying down the seed potato A against the soil in the container 1 in a standing state without squatting down.

As a result, the process of working for a long time while maintaining a squatting posture can be improved, and work can be performed in a less burdensome posture. Therefore, the burden (physical burden) on the worker can be reduced.

Further, when seedlings germinate and grow from seed potatoes A laid down, the worker separates the seedlings from seed potatoes A. Also at this time, the worker can separate the seedlings from the seed potatoes in the container 1 while facing the container 1 in a standing state without squatting down.

Therefore, the process of working for a long time while maintaining a squatting posture can be improved, and the work can be performed in a less burdensome posture. Therefore, the burden (physical burden) on the worker can be reduced.

Moreover, the seed potato A is put down on the upper surface of the soil put into the container 1, as shown in FIG.
Therefore, even if an epidemic occurs in the laid-down seed potato A, the range of influence can be suppressed within the container 1.例文帳に追加

Specifically, the soil for raising the seedlings is placed in the storage space 6, which is a partitioned space, and is separated from the outside (separated). As a result, even when an epidemic occurs, the range of epidemic transmission can be suppressed within the container 1 in which the seed potato is hidden.
Therefore, it is possible to minimize the damage caused by epidemics.

(2) Further, according to the present embodiment, the volume of the accommodation space 6 of the container 1 in the prepared state is 0.60 to 2.40 cubic meters.

Therefore, the size of the container 1 is suitable for the work.
As a result, the worker can work on the container 1 in a posture with less burden.

(3) Further, according to the present embodiment, as shown in FIG. 1, the container 1 is formed with engaging portions 30 for inserting the forks of a forklift (see FIG. 3). Then, the container 1 is lifted and transported by a forklift (forks 50). That is, the container 1 is a large-sized container that can be lifted and transported by a forklift.

Therefore, the size of the container 1 is suitable for the work.
Moreover, since the container 1 can be transported using a forklift, the burden on the operator can be further reduced.

(4) In addition, according to the present embodiment, in the soil filling step in the sweet potato seedling raising method, as shown in FIG. ) to 50-110 cm.

Therefore, the upper surface of the soil put into the container 1 can be placed at a position (height) that makes it easy for the operator to work.
As a result, the worker can work on the container 1 in a posture with less burden.

(5) In addition, according to the present embodiment, as shown in FIG. 3, in the bottom raising step in the sweet potato seedling raising method, the prepared container 1 is raised so that the bottom of the accommodation space 6 is positioned upward. I do. Then, in the soil-filling step, soil is put into the housing space 6 whose bottom has been raised.

Therefore, the amount of soil put into the container 1 can be reduced.
As a result, it is possible to simplify the work of putting soil into the container 1 (it is possible to reduce the work load when putting soil in).

In addition, it is possible to prevent the weight of the container 1 after the soil from becoming too large.
Therefore, it is possible to reduce the work load when moving the container 1 after the laying down process is completed.

(6) In addition, according to the present embodiment, in the subduing step in the sweet potato seedling raising method, as shown in FIG. Put A down in a dense state.
Therefore, the total amount of germinated seedlings can be increased, and the yield of seedlings can be increased.

In addition, in a general sweet potato seedling raising method, a certain distance is provided as a distance between adjacent seed potatoes so that when an epidemic occurs, it is difficult for the epidemic to spread.

On the other hand, in the method of the present embodiment, the soil for raising the seedlings is put into the storage space 6 (inside the container 1), which is a partitioned space, and is separated from the outside. Therefore, even if an epidemic occurs in a state in which a plurality of seed potatoes A are laid down so as to be densely packed, the spread of the epidemic can be suppressed within the container 1 in which the seed potatoes are laid down.

That is, according to the method of the present embodiment, it is possible to increase the yield of seedlings while minimizing the damage of late blight.

(7) Further, according to the present embodiment, in the sweet potato seedling raising method, a plurality of containers 1 are prepared in the preparation step, and soil is put into each of the plurality of containers 1 in the soil filling step, and the soil is laid down. In the process, sweet potato seed potatoes A are laid down on the upper surface of the soil of each of a plurality of containers 1 filled with soil, and in the sprouting process, the plurality of containers 1 in which the seed potatoes A are laid down are stored in a stacked state. (See FIG. 6).

Therefore, a large number of containers 1 can be stored by effectively utilizing the space.
As a result, the number of containers 1 used in the sweet potato seedling raising method can be increased. Therefore, the yield of seedlings can be increased.

4. Modifications In the above embodiment, it has been described that the storage space 6 is pushed up by disposing the bottom-raising member 10 in the container 1 in the bottom-raising step in the sweet potato seedling-raising method. However, as shown in FIG. 8, a plurality of pallets 20 may be stacked at the place where the container 1 is to be installed, and the storage space 6 may be positioned above by placing the container 1 thereon. In this case, the plurality of pallets 20 serve as bottom raising members. That is, the container 1 may be arranged on the bottom raising member.

In this case, it is preferable that part of the front surface of the container 1 serves as the displacement plate 21 . The displacement plate 21 is configured to be rotatable about one end (upper end in FIG. 8). By rotating the displacement plate 21 clockwise, the opening 40 on the front side of the container 1 is closed. Further, the counterclockwise rotation of the displacement plate 21 opens the opening 40 on the front side of the container 1 . When working on the container 1, the displacement plate 21 is rotated counterclockwise to open the opening 40 (as shown in FIG. 8). In this state, the operator works on the container 1 through the opening 40 . Thereby, even if the container 1 is placed at a high position, it is possible to smoothly perform the work on the container 1 .

In this way, by stacking a plurality of pallets 20 and installing the container 1 thereon, the bottom of the container 1 (accommodation space 6) is raised, so that the amount of soil put into the container 1 can be reduced. . In addition, since the container 1 and the pallet 20 are transported by a forklift, it is possible to reduce manual work in the bottom-raising process, thereby reducing the burden on workers.

1 container 5 opening 6 accommodation space 20 pallet 30 engagement part 31 opening 50 fork A seed potato

Claims (7)

A preparation step of preparing a box-shaped agricultural container that is a large container that faces a worker when installed on the ground, has an opening on the top surface, and has a storage space formed inside;
a soil-filling step of putting soil into the accommodation space of the prepared agricultural container;
a submerging step of submerging sweet potato seed potatoes on the upper surface of the soil in the agricultural container in which the soil has been put;
A sprouting step of sprouting from the laid seed potatoes and growing the sprouted seedlings;
and a seedling cutting step of separating the seedling from the seed potato. 2. The method for raising sweet potato seedlings according to claim 1, wherein the volume of said housing space of said agricultural container is 0.60 to 2.40 cubic meters. 3. According to claim 1 or 2, the agricultural container is a large-sized container that is formed with an engaging portion for inserting a fork of a forklift, and is transported by lifting the engaging portion with the fork of the forklift. The described method for growing sweet potato seedlings. In the soil loading step, soil is loaded into the agricultural container so that the top surface of the soil loaded into the agricultural container is positioned between 50 and 110 cm from the installation surface. Item 4. The method for growing sweet potato seedlings according to any one of Items 1 to 3. further comprising a bottom-raising step of raising the agricultural container prepared in the preparation step so as to position the bottom of the accommodation space upward;
The method for growing sweet potato seedlings according to any one of claims 1 to 4, wherein in the soil-filling step, soil is put into the housing space whose bottom has been raised. The sweet potato according to any one of claims 1 to 5, wherein in the laying down step, a plurality of seed potatoes are laid down in a dense state so that adjacent seed potatoes are in close contact on the upper surface of the soil in the agricultural container. Seedling method. In the preparation step, a plurality of agricultural containers are prepared,
In the soil-filling step, soil is put into each of the plurality of agricultural containers,
In the subduing step, subduing sweet potato seed potatoes onto the upper surface of the soil of each of the plurality of agricultural containers filled with soil;
The sweet potato seedling growing method according to any one of claims 1 to 6, wherein in the sprouting step, a plurality of the agricultural containers in which the seed potatoes are placed are stored in a vertically stacked state.

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