JPH07106100B2 - Method for cultivating grass and nursery turf carrier used for the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a method for cultivating grass and a method for cultivating grass, which is applied when a new lawn is newly formed on a golf course or a green area of a park or when the lawn is replaced. The present invention relates to a nursery grass support for use in the method.

[Conventional technology]

The surface of golf course lawns, especially teeing grounds, fairways, and greens, directly affects the playing of golf, but the presence of so-called divots and other physical stresses caused by treading by a player or shot by a club. In addition, soil consolidation and poor water permeability, weed invasion, partial death due to biochemical factors such as pest damage, etc. are likely to occur, and it is important to keep these lawns in good condition continuously. This is one of the extremely important issues in management operation. For this reason, maintenance management for so-called renewal such as aeration, soil, fertilization, and remedy is carried out, but when it deteriorates above a certain level, so-called replanting (also called supplementary planting) is performed to replant the part. .

One method that has been conventionally adopted to secure spares for turfgrass required for this replacement is to secure a field (nursery hereafter) adjacent to or near the golf course. Is. That is, turfgrass of the same kind as that used at a golf course is bred in this nursery, cut out as so-called cut grass if necessary, and used to replace the golf course.

Another method is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-285726, and FIG. 8 explains its outline. In the figure (a), (1) is a rectangular nursery box, (2) is a nursery mat set in this nursery box (1), the details of which include fertilizer components as shown in FIG. It is composed of a plate-shaped fiber (3) that is broken and a net (4) that covers the entire plate-shaped fiber (3) to prevent the plate-shaped fiber (3) from collapsing. Then, as shown in Fig. 8 (b), with the seedling raising mat (2) set in the seedling raising box (1), irrigation, seeding, and soil covering are performed to cause germination, and as shown in Fig. 8 (c). In the greenhouse (or greenhouse)
(5) It is moved to the inside and greened and grown. When grown to the required level, it can be taken out from the nursery box (1) together with the nursery mat (2) and used for the above-mentioned golf course replacement.

[Problems to be Solved by the Invention]

Conventionally, lawn raising for re-covering has been carried out by the above-mentioned method, so that there have been various problems in production efficiency, economic efficiency, quality thereof and the like.

That is, the problem with the method by nursery is
For this reason, vast farmland is needed. Normal,
Different types of turf are used for greens, fairways, and tees that match the conditions of use, so it is necessary to grow all types of lawn in the nursery as well, and generally 10% of the total golf course is used. It becomes the front and back area, and securing it is not easy. In addition, the lawn in the nursery, like golf courses, requires constant maintenance such as pruning and medicine, and requires a considerable number of workers. Furthermore, the cut grass obtained from this nursery is limited to a width of about 30 cm due to restrictions on the cutting equipment (sword cutter), etc., so when the grass is attached locally, the so-called joint area increases and the The period until it becomes a lawn surface will be extended accordingly. In addition, since the roots of the hair are cut during cutting, the rooting at the site becomes worse.

In addition, the method using the nursery mat (2) is the net (4)
This net (4) is entwined with the roots and hair roots of turfgrass.
Since the grass and the grass are integrated with the soil, the net (4) remains in a relatively shallow part of the grass soil after the refitting at the golf course. As a result, when the golf player makes a shot, the club head may hit the net (4) and affect the swing touch. Moreover, the quality of the soil deteriorates due to the residual of the net (4). In this case, in order to improve the above-mentioned adverse effects, it is possible to newly consider a measure such as suppressing the strength of the net (4) or using a material having a property of finally dissolving in the soil. However, as described above, since the seedling raising mat (2) serves as a strength member for taking out the seedling raising grass from the seedling raising box (1) and thereafter handling the seedling raising grass, if the above improvement measures are adopted, the net (4) It is necessary to reduce the area of a single cultivating turf grass by the amount corresponding to the decrease in the strength of No. 1, which has the adverse effect of decreasing productivity and prolonging the on-site construction as in the case of the cut grass described above.

The present invention has been made to solve the above problems, and it is possible to easily produce an extremely large area by itself, and the production efficiency is high, and the workability during handling such as transportation is good. It is also an object of the present invention to obtain a nursery lawn turf holder that can easily secure good quality lawn land at an early stage in the field construction work, and a method of cultivating turf using this nursery turf holder.

[Means for Solving the Problems]

The method for cultivating turf according to the present invention, the bottom surface of the bed having a predetermined depth and a bottom surface formed in a substantially flat surface, the diameter dimension range of 0.5 ~ 10 mm, and the sum of their opening area is the whole.
The first step of laying a holding film made of a flexible material in which a plurality of holes of 0.01 to 15% are formed with a substantially uniform density, and a predetermined thickness on the holding film in the bed. A second step of forming a culture soil layer containing sand as a main component, a third step of sowing seeds of turfgrass in the culture soil layer, and a fourth step of growing the turfgrass by irrigation, fertilization and light irradiation. In the step of, the root portion of the turfgrass grows and grows in the culture soil layer, and a part of the hair root penetrates through the hole of the holding membrane to the extent that the culture soil layer and the turfgrass can be separated by the holding membrane. At the stage where they can be held together, these ones are taken out from the above-mentioned bed as a nursery grass holder.
And a sixth step of moving the seedling turf holder from the seedling raising place to the cultivating place, and after peeling the holding film from the seedling raising turf holder at the cultivating place, the turf grass is floored together with the culture soil layer. And the seventh step of creating in the soil.

Further, a fertilizing mat formed of a material having a fertilizing / water-holding property to a predetermined thickness may be laid between the bottom surface of the bed and the retaining film.

Further, the bottom surface of the bed may be configured by a flat portion formed by stamping a part of the open field.

Further, in the fourth step, it is possible to add an eighth step of cutting the foliage of the turfgrass to a predetermined height according to the degree of growth of the foliage. The body may be handled in a spirally wound state.

In addition, a lawn soil for golf courses can be considered as an optimal cultivation place.

[Action]

A culture soil layer is formed with the holding membrane facing down in the bed, and seeds of turfgrass are sown on this to take measures such as irrigation for growth. The hair root, which is the tip of the turfgrass-priced part, gradually grows and extends, and a part of the hair root penetrates through the hole formed in the retentive membrane, and the penetrating hair root integrates the turfgrass and the culture soil layer with the retentive membrane. During this period, the foliage part of the turfgrass also grows and extends, but the pruning may be appropriately performed depending on the degree of growth. When a fertilizer mat is laid, the nutrient solution and water supplied from above are once absorbed and stored in this fertilizer mat, then released by the dryness of the culture soil layer thereafter, and evaporated through the retention membrane to the culture soil layer. , Osmotic supplied. Further, if the flat portion formed on the open field is used as the bottom surface of the bed, the material for the bed is saved and the open field itself functions as a fertilizer.

The hair roots are taken out of the bed at a stage when the hair follicles have penetrated through the holes of the holding membrane. In this case, since a flexible material is used for the holding film, if this is made a long product with a constant width, the grass, the culture soil layer, and the holding film can be used just as if winding a thick carpet. Can be wound together. Here, the holding film prevents the sand, which is the main component of the culture soil layer, from falling off and keeps the thickness of the nursery grass almost constant up to the site.

When the above-mentioned nursery turf holder is formed on a grass soil for golf course, etc., it is carried out after peeling the holding film. Although part of the hair roots of turfgrass may be cut off due to the peeling of the retaining film,
Most of the hair roots are preserved as they are growing in the bed, so the rooting on the site is good. Further, since the holding film functioning as a strength member in each handling step is entirely removed at the local construction site, there is no possibility that it will be an obstacle to golf play or deterioration of soil quality, for example.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the appearance of a nursery lawn support (6) completed as a product, which is wound into a spiral shape for use in feces during storage or transportation. FIG. 2 is a partial sectional view showing the details of the structure. In the figure,
(7) is a holding film which is a strength member of the nursery grass support (6), and is made of a material having both flexibility and liquid impermeability such as vinyl resin. Then, as shown in FIG. 3, holes (7a) having a predetermined diameter are formed in the holding film (7) at uniform intervals. (8) is a culture soil layer containing sand as a main component, which is usually formed to have a thickness of about 10 mm, but depending on the type of turfgrass and the culture soil layer (8), and the conditions of growth and formation,
An appropriate thickness dimension is selected within the range of about 30 mm.

The main reason for using sand as the culture soil layer is as follows. That is, generally, the growth of plants is greatly affected by the distribution of the three phases (solid phase, liquid phase and gas phase) of soil. In particular, since the pressure on the lawn soil is continuously applied, the gas phase tends to decrease, resulting in poor water permeability, which directly affects the growth of the turf. Therefore, dry soil with good air permeability is suitable for both turf grass and grass, and the distribution of solid phase 40%, liquid phase 30%, gas phase 30% is ideal. Therefore, sand is the main component to improve the air permeability. However, on the other hand, sand has a weak adhesion to the root portion, and in the case of conventional cut grass and the like, the root sand is detached and dropped during handling during transportation and the thickness of the cut grass is likely to change. This variation in turf thickness is due to, for example, green undulation.
Therefore, in order to prevent this, the work of adjusting the soil at the time of construction becomes complicated. In the case of the present invention, since the retaining film (7) is present until the time of construction, the root sand hardly drops and the fluctuation of the turf thickness is prevented.

As sand which is the main component of the culture soil layer (8), specifically, sand sand soil, coconut husk activated carbon, asbestos (asbestos), ceramics, rock wool, etc. processed into powder are suitable. It is also possible to use a product marketed under the trade name Isolite (Isolite Industry Co., Ltd.) that contains powdered silica stone, talc, borolith, phosphorite, etc. obtained by crushing refractory bricks, which are waste materials of blast furnace. .

Next, (9) is turfgrass, and the height of its foliage (9a) is
It is trimmed to about 10 mm. (9b) is the root part of the turfgrass (9), and most of it grows and extends laterally in the culture soil layer (8) due to the presence of the retaining membrane (7). However, a part of the hair root (9c) which is the tip portion thereof penetrates the hole (7a) formed in the holding film (7) and reaches the lower surface side of the holding film (7).
An appropriate amount of hair roots (9c) penetrating this hole (7a) mechanically bonds the turfgrass (9) and the retaining membrane (7), and together with the culture soil layer (8), three parties (7), (8) ( 9) is integrated.

Therefore, how to form this hole (7a) is important. That is, if the diameter of this hole (7a) is too small, the hair root (9
It is difficult for c) to penetrate, and when the holding film (7) is peeled off, root cutting is likely to occur. Further, as will be described later, when the nutrient solution is also absorbed from the lower surface of the holding film (7), the hole (7a) needs to have a diameter that does not hinder the absorption.

On the other hand, if the diameter is too large, the hair root (9c) penetrates too much, and the root becomes tense, making it difficult to peel off the holding film (7). Furthermore, the formation density of the holes (7a) is also a problem. That is, if this density is too small, it will be three (7) (8) (9)
Insufficient strength to integrate the two with each other causes the retaining film (7) and the culture soil layer (8) to be partially peeled off, causing sand to move and causing fluctuations in the turf thickness. Further, if it is formed too densely, it becomes difficult to peel off the holding film (7), and if it is forcibly peeled off, the holding film (7) is damaged and a part thereof remains. Then, the inventor conducted an experiment using holding films (7) having different diameters and densities of the holes (7a), and as a result, the diameter was 0.5 to 10 mm,
When the density is expressed by the ratio of the opening area of the hole (7a) to the total area, if the ratio is set in the range of 0.01 to 15%, the above-mentioned integration function of the holding film (7) can be obtained and its peeling can be achieved. It turns out that is also relatively easy.

It should be noted that this density can be expressed by the number of holes (7a), but in consideration of the relationship with the diameter of the holes (7a), the expression by the ratio of the above-mentioned opening areas is appropriate.

Further, the shape of the holes (7a) does not necessarily have to be a circle, and the arrangement thereof is not limited to the lattice shape and may be a staggered arrangement or the like.

Further, as shown in FIG. 1, since the nursery grass support (6) according to this embodiment can be wound in a roll shape, its volume can be reduced relative to its area, and particularly storage and transportation. Sometimes it brings great benefits. On the contrary, since it can be wound and handled in this way, the carrier area of the nursery grass can be greatly increased (for example, a width of 2 m and a length of 2 m).
Even if it is about 40m long, it can be produced.) It is easy to carry out on-site preparation work not only when handling it, but also because it reduces joints, so a uniform and good quality lawn surface can be obtained in a short time even after the preparation. .

Next, referring to FIG. 4, an embodiment of a method for producing the above-mentioned nursery lawn support (6) will be described. In the figure (a), (1
0) is a bed having a predetermined depth and a flat bottom surface, which is produced by appropriately molding styrofoam. Even in the case of producing a long-sized nursery grass support (6), there is an advantage that it is lightweight and easy to handle. The bed (10) is installed so that its bottom surface is horizontal, but it may be installed with a slight inclination in relation to the solution supply described later. Then, first, as the first step, the above-mentioned holding film (7) is spread on the bottom surface of the bed (10). Next, a culture soil layer containing sand as a main component is formed to a thickness of about 5 to 30 mm on the holding film (7) (second step). The same figure (b)
Shows a third step of sowing seeds (11) of turfgrass on the culture soil layer (8). In the figure, (12) is a seeding device, in which seeds (11) are housed inside a container with an adjustable gap formed at the bottom, and the wheels (12a) attached to the left and right ends of the container body The seeds (11) are sowed on the entire surface of the culture soil layer (8) by moving in the direction perpendicular to.
In addition, irrigation and soil covering will be performed at this stage if necessary.

In the above, as the third step, the case of sowing the turf grass seeds (11) itself has been described. However, in the case of turf grass, the commonly known debris obtained by cutting the once grown grape stalk into a predetermined size is described. It is also possible to sprinkle what is called turf and to newly grow the foliage and root of turfgrass from the growth points contained therein, and this method itself has been practiced conventionally. Therefore, the third step in the specification of the present application can include the case where the above waste grass is used.

Next, FIG. 4 (c) illustrates a fourth step of growing turfgrass (9) from seeds (11) by irrigation, fertilization and light irradiation. In the figure, (13) is a fluorescent lamp for securing a necessary amount of solar radiation. This figure is a kind of hydroponic cultivation method that has recently been put into practical use, and is an application of the method of supplying the nutrient solution in the form of a drip.
(14) is a tank containing the nutrient solution, (15) is a tank (14)
A pump for feeding the nutrient solution from the pump, (16) is a drip tube for dropping the nutrient solution sent from the pump (15) into the culture soil layer (8), and the nutrient solution is uniformly fed to the entire culture soil layer (8). It is attached to the support (17) so that the liquid can be supplied at substantially equal intervals. Reference numeral (18) is a control valve provided for each drip tube (16) for adjusting the amount of dropping. Reference numeral (19) is a control device that adjusts the amount of nutrient solution discharged from the pump (15) so as to obtain an optimum amount of nutrient liquid drop corresponding to, for example, the amount of solar radiation. In addition, the illustrated device is configured so that the support (17) can be rotated about the shaft (20) in the direction of the arrow A. For example, when the seeding device (12) is run, the support (17) is not supported. It is set vertically so that it does not interfere with the above running. A growth device (21) is constituted by the above devices.

FIG. 7D shows an eighth step of cutting the foliage portion (9a) on which the turf grass (9) has grown to a predetermined height (about 10 mm). That is,
If the foliage (9a) grows too much, only the stem will remain and the quality of the final lawn surface will be impaired, so it is necessary to trim at the appropriate stage. However, the frequency of this pruning can be reduced if the growth rate of the foliage (9a) can be suppressed with respect to the growth rate of the root (9b) of the turfgrass (9) by adjusting the amount of solar radiation. . In the figure, (22) is a so-called lawn mower commonly known as a green mower, which is modified so that it can run on the bed (10).

Then, the growth and extension of the root portion (9b) of the turfgrass (9) progresses, and as described above, when a part of the hair root (9a) at the tip of the grass penetrates the hole (7a) of the retention membrane (7). Then, the holding film (7) is pulled out from the bed (10) by pulling the end (fifth step). The extraction timing may be judged from the appearance by slightly turning the holding film (7) at the corner of the bed (10), but when the growth conditions can be artificially controlled as in this example. May be obtained in advance by trial, and the time may be managed based on this data during mass production.

FIG. 5 illustrates another embodiment corresponding to the fourth step shown in FIG. 4 (c). This is also called a so-called nutrient solution circulation system. In the figure, a bed (23) is composed of a bed body (24) having a recess (24a) formed therein and a panel (25) arranged above the recess (24a). Vertically spaced holes (25
a) is provided. Then, the holding film (7) and the culture soil layer (8) are housed on the upper surface of the panel (25).
The nutrient solution delivered from the tank (14) by the pump (15) is guided to the water sprinkling pipe (26), and becomes mist-like from a large number of nozzle holes (26a) provided in the water sprinkling pipe (26) into the culture soil. Sprinkled on layer (8). Excess nutrient solution in the culture soil layer (8) passes through the hole (7a) of the retaining film (7) and the vertical hole (25a) of the panel (25) and is recessed (24) in the bed body (24).
It drops into a) and the remaining liquid is left in the tank (1
4) is collected. (28) is a temperature sensor embedded in the culture soil layer (8), and a pump (15) is used by the control device (19) so that the output of the temperature sensor matches the optimal growth conditions for the grass (9).
The circulation amount of is controlled. Reference numeral (29) is a hot water pipe installed in the recess (24a) of the bed body (24) for keeping heat in winter and at night. The presence of this recess (24a) indicates the presence of the panel (2
5) By communicating with the vertical hole (25a), it also contributes to the improvement of the air permeability of the culture soil layer (8).

The sixth step is to move the nursery grass support (6) taken out from the bed (10) or (23), which is a nursery place, to the lawn soil of a golf course, which is a farm place. In this case, the nursery grass support (6) is wound into a roll by using a suitable core type as shown in FIG. Depending on the case, it may be handled as a flat plate. In the case of a roll, cutting in the width direction is easy if the roll is left as it is.

Since the holding film (7) is made of a material that is hardly liquid permeable,
Excessive drying of the nursery grass support (6) during storage or transportation is prevented, and quality deterioration during this period is prevented.

Next, in the final (seventh) step, when the above-mentioned nursery turf support (6) is used, for example, when the green of a golf course is replaced, it is transported to the site with the retention film (7) attached. The holding film (7) is peeled off immediately before the soil is formed. Some amount of hair roots (9c) can be cut by this peeling,
All roots (9b) except this part of hair roots (9c) are in good health, and the retention membrane (7) prevents root sand from falling and the turf thickness is kept constant. Floor soil maintenance work is relatively easy, and turfgrass rooting after construction is good. Further, since the retaining film (7) is completely removed at the time of on-site construction, the golf play obstacles that have been considered conventionally are completely eliminated from the time of the construction, and the soil quality is not deteriorated. .

Complete removal of the holding film (7) during fabrication increases the degree of freedom in selecting the material forming the holding film (7). That is, for example, there is a request to have both a mechanical strength aspect that holds turfgrass and a culture soil layer together to withstand subsequent handling and a chemical characteristic aspect that dissolves quickly in soil and does not deteriorate the soil quality. Since it has been solved and the requirements of only the former have to be taken into consideration, it is sufficient that the holding film is made of an inexpensive material having good mass productivity and subjected to a simple processing.

In addition, in the above-mentioned embodiment, the case where the beds (10) and (23) are formed in one step has been described. However, the beds may be appropriately stacked to have a multi-step configuration. It can also be installed indoors such as in order to increase the growth rate.

Also, as a means for growing turfgrass, the nutrient solution drip method described above,
It is not limited to the nutrient solution circulation type. That is, a method may be adopted in which the nutrient solution is sprayed and supplied in the form of a mist using a spray nozzle or an agricultural hose.

FIG. 6 is intended to reduce the amount of capital investment by simplifying the supply method of the nutrient solution in the turfgrass growing means. In the figure, (30), like (10), is a bed made by appropriately molding styrofoam. The difference from the embodiment shown in FIG. 4 is that a fertilizing mat (31) having a fertilizing and water-retaining property is laid on the bottom surface of the bed (30). This fertilizing mat (31) A holding membrane (7) and a culture soil layer (8) are provided thereon. As the fertilizer mat (31), for example, rock wool or other mineral cotton is compressed to an appropriate density and formed into a mat having a thickness of about 5 to 20 mm. It may be made of activated carbon or the above-mentioned isolite.

In this embodiment, when the nutrient solution is supplied from above and irrigated by an appropriate method, the nutrient solution or the like flows through the culture soil layer (8) through the hole (7a) of the retaining membrane (7) into the fertilizer mat (31). ), The fertilizer mat (31) absorbs and stores the nutrient solution and water. Excessive amount is discharged from the drain port (30a) provided in the bed (30). In the embodiment shown in FIG. 4, it is necessary to supply the nutrient solution quite frequently, but in the case shown in FIG. 6, the fertilizer mat (31) stores a large amount of nutrient solution and water. Therefore, when the water content in the culture soil layer (8) decreases, the fertilizer mat (3
The nutrient solution in 1) will be sucked up and the nutrient solution will be automatically supplied. Therefore, the nutrient solution supply equipment is simplified, and in some cases, it is sufficient to supply the nutrient solution by hand only a few times, and it is possible to omit special equipment.

As described above, when importance is attached to the effect of sucking up the nutrient solution from the fertilizer mat (31), it may be better to use a material having good liquid permeability as the holding film (7). That is, the diameter and density of the holes (7a) of the holding film (7) can be suppressed to a certain amount or less from the viewpoint of ensuring the releasability of the holding film (7) from the culture soil layer (8) and turfgrass (9). However, there is a possibility that fertilization will not be sufficient just by sucking up the nutrient solution only from the hole (7a), but by using a material with good liquid permeability for the retaining film (7), the above-mentioned problems can be solved. is there. Materials such as paper with specific density and mechanical strength have the property of allowing liquid to permeate but not allowing hair roots of turfgrass (9) to pass through, and are suitable for the holding membrane (7) in this case. There is.

FIG. 7 is a further simplification of the growing means. In this embodiment, a flat part (32a) is formed by appropriately stamping a part of the open field (32), and a bed is formed by a frame material (33) such as wood arranged on the flat part (32a). The holding membrane (7) and the culture soil layer (8) are provided here. In this case, no special equipment such as the bed (30) or the fertilizer mat (31) is required, and the growth equipment can be configured only with the appropriate frame material (33). Then, the open field (32) itself functions as a fertilizer and appropriately supplies the stored nutrient solution to the culture soil layer (8). Especially, it is suitable for the case where the turfgrass is used for raising seedlings at the lowest cost by using the farmland.

In each of the above examples, the turfgrass (9) is integrally held by the culture soil layer (8) and the holding film (7).
A reinforcing membrane may be inserted in parallel with the retaining membrane in the middle portion of the culture soil layer (8) in the thickness direction. This reinforcement film is formed by a net-like film that dissolves and becomes fertilizer on the way, and the root part (9b) of turfgrass (9)
The purpose is to strengthen the degree of mutual connection. Unlike the net (4) described in the prior art, this is merely for the purpose of reinforcing between the roots (9b),
It does not need high strength, as long as it dissolves quickly,
The harmful effect of the conventional net (4) does not occur.

On the contrary, in the bed, the turf grass (9) has its root (9b)
If the hair root (9c) and the hair root (9c) are grown to a length of 10 cm or more, the retention membrane (7) may be omitted. This is because the roots (9b) and the like are entwined with each other at a sufficient density and can be wound into a carpet shape.

Furthermore, each of the above-mentioned embodiments has assumed the replacement of lawns such as greens on a golf course, and has explained the structure of a nursery grass holder that integrally holds the nursery grass necessary for this, a production method, etc. Can be applied directly to nursery turf that is designed for new construction, and it can be applied not only to golf courses but also to various parks and stadium lawns, as well as indoor interiors and vertical walls. It can also be used for modeling.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

Since the turfgrass and the culture soil layer are integrally held by the retaining film via the hair roots of the turfgrass, it is possible to keep the turf thickness constant without dropping off the root sand.

In addition, by utilizing the soft property of the holding film, this holding film can be wound into a roll shape as a strength member, and the space required for handling such as storage and transportation can be reduced. The area can be greatly increased and the workability during construction is improved.

At the time of final construction, the holding film is peeled off and removed, so that solid matter does not remain on the lawn, the quality of the soil is not deteriorated, and the holding film is inexpensive. Also, unlike the conventional cut grass, the roots are not trimmed, so the roots are good at the time of construction. In particular, when applied to a grass field of a golf course, there is no fear that the swing touch by the player will be affected, and since it can be put to commercial use in an extremely short time after construction, its economic effect is enormous.

Since the diameter and the density of the holes formed in the holding film are set within a predetermined range, it is possible to relatively easily realize both of the characteristics such as the peeling property with the grass and the like.

By laying a fertilizer mat between the holding membrane and the bed, the nutrient solution and the water supplied by the fertilizer mat are once absorbed and stored, and appropriately supplied to the culture soil layer through the holding membrane.
It is possible to simplify the supply of nutrient solution and irrigation equipment.

By using the flat portion formed on the open field as the bottom surface of the bed, the equipment constituting the bed becomes simple and inexpensive, and since the open field itself functions as a fertilizer mat, the work for growing can be simplified and labor saving can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a nursery turf holder according to an embodiment of the present invention wound in a roll shape, FIG. 2 is a partial sectional view showing details of a part thereof, and FIG. FIG. 4 is a perspective view showing the outer appearance of the membrane, FIG. 4 is an explanatory view showing one embodiment of a method for producing the above-mentioned seedling raising turf holder in process order, and FIG. 5 is an explanatory view showing a part of another embodiment of the production method, FIG. 6 FIG. 7 is an explanatory view showing a part of still another embodiment of the production method, FIG. 8 is an explanatory view showing a conventional production method of nursery grass, and FIG. 9 shows the details of the nursery mat. It is a perspective view. In the figure, (6) is a nursery grass support, (7) is a retention film,
(7a) is a hole formed in the holding membrane, (8) is a culture soil layer,
(9) is turfgrass, (9a) (9b) and (9c) are foliage, root and hair root of turfgrass, (10) (23) (30) are beds, (11) are turfgrass seeds, (12) Seeding equipment, (21)
Is a growth device, and (31) is a fertilizer mat. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (7)

[Claims] 1. A bed having a predetermined depth and having a substantially flat bottom surface, on the bottom surface of which has a diameter range of 0.5 to 10 mm,
And a first step of laying a holding film made of a flexible material in which a plurality of holes whose sum of opening areas is 0.01 to 15% of the whole are formed with a substantially uniform density; A second step of forming a culture soil layer containing sand as a main component with a predetermined thickness on the retaining film, a third step of sowing seeds of turfgrass into the culture soil layer, irrigation, fertilization and light A fourth step of irradiating to grow the turfgrass, and the root portion of the turfgrass grows and extends in the culture soil layer, and a part of the hair roots penetrates through the holes of the retention membrane to perform the culture by the retention membrane. A fifth step of removing the soil layer and turfgrass from the bed as a nursery lawn support at the stage where the detachable range can be retained as a unit, and the nursery lawn support at a nursery site From the 6th step of moving from the cultivation place to the cultivation place, the cultivation place In a seventh step the method of cultivating a lawn with a to construct a said grass after removing the holding layer from the seedling grass holder in bed soil together with the potting layer. 2. A turf according to claim 1, wherein a fertilizer mat formed of a material having a fertilizer-holding / water-retaining property to a predetermined thickness is laid between the bottom surface of the bed and the holding film. Cultivation method. 3. The method for cultivating grass as claimed in claim 1, wherein the bottom surface of the bed is a flat portion formed by stamping a part of the open field. 4. The method according to claim 1, further comprising an eighth step of cutting the turf grass to a predetermined height according to the degree of growth of the foliage of the turf in the fourth step. The method of cultivating grass described. 5. The method for cultivating lawn according to any one of claims 1 to 4, characterized in that, in the sixth step, the support for raising seedlings is treated in a spirally wound state. 6. The method of cultivating lawn according to claim 1, wherein the cultivating place is a soil for grass of a golf course. 7. A holding film made of a flexible material in which a plurality of holes having a diameter dimension range of 0.5 to 10 mm and a sum of the opening areas thereof being 0.01 to 15% of the whole are formed with a substantially uniform density. And a culture soil layer containing sand as a main component formed to have a predetermined thickness on the retention membrane, and a part of the root portion of the turfgrass grown and grown in the culture soil layer is provided with a hole in the retention membrane. 2. The culture soil layer and the turfgrass are integrally held within a releasable range by the holding membrane so that the culture soil layer and the turfgrass are held together.
A seedling raising turf holder for use in the turf cultivation method described.