JPH04148618A - Lawn carpet - Google Patents

Abstract

PURPOSE:To obtain a light-weight lawn carpet formed of the middle layer part containing indefinitely shaped bark thin pieces, the lower layer part entangled with roots and the upper layer part having crossed lower leaves, excellent in tensile strength and workability in transportation and transplantation, etc. CONSTITUTION:A mixture of indefinitely shaped bark thin pieces of Pinaceae having 3-8mm maximum length and 0.2-2mm thickness, lawn seeds and fertilizer is laid on a film and water is sprinkled and these seeds are germinated to rear the lawn and grown lawn is reaped, preferably once or more so as to leave the lower leaves, and made lawn D, bark laminas E and roots F so as to form upper layer A, middle layer B and lower layer C, respectively to provide the objective lawn carpet.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is useful when transplanting lawns to the surface of newly created land such as burial mounds, parks, golf courses, etc. This relates to transplanting and moving lawns that are used when installing lawns for decoration, etc., and more specifically, "
This relates to the improvement of ``vegetated carpet''.

[Conventional technology]

Conventionally, when transplanting turf to cultivated land, the cultivated lawn was cut into strips and transported from the cultivated land, and then transplanted to the cultivated land.

However, transplanting turf using this method requires a lot of manpower for stripping the grown turf, transporting it, planting the turf, etc. In addition, the weight of transplanted grass was heavy, making it inconvenient to transport.

In order to solve this problem of requiring human labor, attempts were made to lengthen the length of grass for transplanting.

For example, in Japanese Patent Publication No. 50-21373, there is a filter 1
Disclosed is an elongated turf-bearing laminate made by laying a flexible mesh structure over a flexible mesh structure, growing grass thereon, and entangling the roots of the grass with the mesh structure.

However, this method has a problem in that foreign matter called a network structure remains between the roots of the transplanted grass. If the mesh structure is exposed due to being pecked by a bird, etc., or if a part of the lawn is damaged, such as by being caught by a person's foot etc., the mesh structure may damage other parts of the lawn. There was a risk that it would spread.

One of the inventors of the present invention, as seen in Japanese Patent Application Laid-Open No. 53-75035, solved this problem by infiltrating the entire root into a thin layer of compost composed of crushed bark, and thereby allowing the root to permeate itself. A lawn carpet supported by the organization was completed.

[Problem to be solved by the invention]

The invention disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 53-75035 is
Although this was intended to be a long lawn carpet that does not use foreign matter such as a mesh structure, there was a problem that the resulting lawn carpet had low tensile strength and would tear when rolled up or rolled out.

The problem to be solved by the present invention is to provide a lawn carpet with excellent tensile strength without using foreign substances such as mesh structures.

[Means for Solving the Problems] In order to solve the above problems, the present inventors have developed an upper layer consisting of grass with interlaced lower leaves, a maximum length of 3-8 mm and a thickness of 0.2-8 mm.
A medium consisting mainly of amorphous bark flakes of plants such as Pinaceae, of which 30% by weight or more are 2 am in size, a middle layer consisting of the roots of the upper layer of grass and roots extending from it, and a root portion of the middle layer of grass. To provide a lawn carpet consisting of a lower layer formed by entwining roots in a fabric-like manner extending from the roots through the middle layer.

The characteristic of the lawn carpet related to this application is that it consists of three layers: an upper layer, a middle layer, and a lower layer, and these three layers interact with each other to maintain a sheet-like shape while maintaining an excellent It is to exhibit tensile strength.

The upper layer is a layer of grass interlaced with the lower leaves. By interlacing the lower leaves of the grass, even when the lawn carpet according to the present invention is rolled up and the soil layer is reversed, the interlaced lower leaves can prevent the resin flakes in the middle layer from falling. become.

In order to sufficiently interlace the lower leaves, it is necessary to grow the grass densely and to mow the upper part of the lawn at least once, leaving the lower leaves, to promote the growth of the lower leaves.

The middle layer has a maximum length of 3 to 811ffi and a thickness of 0.2 to 2.
This layer consists of a medium mainly composed of irregularly shaped bark flakes of pines, etc., which have a size of 30% or more by weight, and an upper layer consisting of the roots of the lawn and the roots extending from it.

Maximum length 3~8as, thickness 0.2, accounting for 30% by weight or more
The large irregularly shaped bark flakes of ~2 heat fix the roots of the grass and maintain the sheet-like state when the grass carpet is rolled up for transportation, that is, it provides shape retention. It is for. Therefore, this large bark flake needs to have a maximum length of 3 to 8-1. If it exceeds 8-, the shape retention of the middle layer will improve, but the spacing between the grass will become too wide and the grass will need to be grown for a long period of time until the lower leaves are sufficiently interlaced to obtain the shape retention of the entire lawn carpet. is required. In addition, if it is less than 3M11,
The grass carpet's shape retention is poor, and when it is turned upside down, there is a risk that it will spill out from between the intertwined lower leaves of the grass.

The size of the bark does not necessarily have to be uniform; rather, it is preferable that barks of various sizes are mixed.

The medium layer has a maximum length of 3 to 8+ ms+ and a thickness of 0.2 to 2
- may consist only of one large bark flake,
In addition, bark flakes with a maximum length of less than 3 mm, peat moss, solid fertilizer, etc. may be included as long as a certain amount of voids remain. If the material with a maximum length of less than 3alI11 is mainly bark flakes, shape retention can be provided if at least 30% by weight of bark flakes with a maximum length of 3 to 8s+s and a thickness of 0.2 to 2mm are present. .

As for the material used to provide mold retention, a material in the form of thin flakes in which the layers are layered almost in parallel is more effective than a granular material such as sand. Normally, arranging the flakes almost parallel to the layers is easily done by applying vibration or lightly stepping on them.

The thickness of the bark flake is 0.2 to 2 mm, and if it exceeds 2a+m, the shape retention effect as a flake becomes low, and the thickness is 0.2 to 2 mm.
If it is less than mm, there will be strength problems such as cracking when handling it as a powder.

The shape of the bark flakes needs to be irregular, and does not particularly need to be disc-shaped or needle-shaped. If it is disc-shaped, the ratio of the overlapping area with other bark flakes will be smaller, and the shape retention effect will also be lower. Also, if it is needle-shaped, it will intertwine with other bark flakes better and the whole will be more flexible, but it will be bulkier and less effective in fixing the roots of the grass.

In this respect, the bark of pine trees that easily become flaky, such as red pine, black pine, rainbow pine, Japanese larch, and larch, is most suitable than the bark of cedar, which tends to become needle-like.

Resin flakes, both 3 to 8 and less than 3, act as a growth medium for grass by absorbing water and fertilizer well and releasing it slowly, and after transplanting, the bark itself also has a slow-acting effect. It also acts as a natural fertilizer, and in the end it turns into soil and does not remain in the soil as a foreign substance.

The lower layer is a layer of grass roots intertwined with each other,
The intertwined roots form a woven layer that holds the middle layer of bark flakes from below and traps the middle layer in a sandwich with the upper layer.

This root layer is formed by growing grass on a plastic film, and the roots of the grass that penetrate the middle layer and reach the plastic film extend laterally between the plastic film and the middle layer. be done. To encourage this lateral elongation of roots and form a woven layer,
Just like when the lower leaves of the grass are thoroughly interlaced as described above, it is necessary to make the grass denser and to mow the top of the grass at least once, leaving the lower leaves, to encourage root growth. be.

[Effect]

Since the lawn carpet according to the present invention has the above-described structure, it is thought that it has high tensile strength without the aid of a mesh structure or the like due to the following effects.

The middle layer has a maximum length of 3L to 8-1 stacked almost parallel to the layers.
The presence of irregularly shaped bark flakes with a thickness of 0.2 to 2 mm has the effect of fixing the roots of the grass and maintaining its sheet-like shape.

The upper surface of this middle layer is covered by a mesh layer made up of interlaced lower leaves of grass, and the lower surface of the middle layer is supported by a layer of grass roots intertwined in a woven fabric, so that the upper and lower layers are
It has the function of sandwiching the middle layer to prevent the middle layer from collapsing.

On the other hand, the root of the grass is fixed in the middle layer that is sandwiched in this way, and the roots that come out from there to the lower surface of the middle layer are tightly intertwined like a fabric to form the lower layer. has the same effect as a network structure.

Fourth, the bark that forms the middle layer acts as a growth medium for the grass by absorbing water and fertilizer well and releasing them slowly, and after transplanting, the bark itself also serves as a slow-release fertilizer. In the end, it turns into soil, so it does not remain as a foreign substance.

〔Example〕

A black opaque synthetic resin sheet with a width of 70 cm and a length of 15 m, in which many holes of diameter im- were provided at approximately 10 cm intervals, was laid on a horizontal piece of land. These holes are for draining excess water during rain.The black opaque hole was used to prevent weeds from growing from the ground under the sheet when there is nothing on the sheet. This is to prevent

On the other hand, the bark of red pine was crushed to obtain bark flakes that passed through a 7-mesh sieve. The maximum flame distribution of the bark flakes was as follows: 32% by weight was 3 or less, 66% was 3 to 7a, and 2% was 7 or more. In addition, the smaller the thickness, the thicker the larger the thickness. Those with a maximum length of about 3-- were about 0.3 sm+, and those with a maximum length of about 7-- were about 1-ugly. The shape is triangular, rectangular,
It had an irregular shape such as a trapezoid or polygon, and was elongated in the direction of the fibers.

130 g of grass seeds and 160 g of fertilizer were added to 30 kg of this bark flake, mixed well, spread on the synthetic resin sheet described above, leveled and pounded to form a layer of 2C-thick.

Thereafter, the seeds were watered to germinate and grass was grown in the usual manner.

Two weeks after germination, when the grass had grown about 4 cm beyond the bark layer, it was cut to a height of 2 cm, and additional fertilizer mainly containing nitrogen was applied to promote the growth of leaves and roots.

Four weeks after germination, the grass was cut again.

Then, 6 weeks after germination, grass carpet ears were harvested.

In addition, in order to make the growth of lower leaves and roots more effective, grass may be added to the seedlings a total of 4 times a week from 2 weeks after germination.

The grass carpet thus obtained had a thick layer in which roots extending below the middle layer were completely intertwined in a woven fabric, as shown in the cross section of FIG.

Figure 1 has been enlarged approximately twice, and in this figure, A is the upper layer consisting of grass, B is the middle layer mainly consisting of bark flakes, C is the lower layer consisting of intertwined roots, D is grass, and E is the The large bark flakes that appear in the cross section, F, indicate grass roots. Note that the bark flakes in the middle layer are omitted except for large ones.

In this lawn carpet, the number of plants per 1a+" was about 60,000, the plant height and weight was about 1.1 kg, and the root weight was about 3.3 kg. Also, the distribution of the maximum length of bark flakes in the lawn carpet In terms of weight percentages, 39% were 3 mm or less, 60% were 3-7 ms, and 1% were 7 ms or more.On the other hand, the thickness of the bark flakes varied depending on the absorbed moisture. It is somewhat thicker, 0.3 to 1.
It was about 5m.

The conventional lawn carpet disclosed in JP-A No. 53-75035 was often torn to pieces when rolled up and collected, but the lawn carpet obtained in this example was 5m0') Even when hung at a high height, it did not break into pieces.

〔Effect of the invention〕

Since the lawn carpet according to the present invention has the above-described structure and function, it has high tensile strength and is lightweight.
Stripping, rolling, transporting, pulling out, transplanting, etc. from the growing field can be done efficiently, and it has excellent effects such as not leaving any foreign matter on the transplanted lawn.Furthermore, it can be used vertically in exhibition halls, etc. This has the effect of opening up new uses, such as being able to spread grass on nearby steep slopes.

[Brief explanation of drawings]

FIG. 1 is a partially enlarged view of a cross section of a lawn carpet according to the present invention obtained in an example. In this figure, A is the upper layer consisting of grass, B is the middle layer consisting mainly of bark flakes, C is the lower layer consisting of entangled roots, D is grass, E is a large bark flake that appears in the cross section, and F is the roots of grass. show. Note that the bark flakes in the middle layer are omitted except for large ones. figure

Claims (1)

[Claims] Upper layer consisting of grass with interlaced lower leaves, maximum length 3-8 mm
,) A medium layer consisting mainly of irregularly shaped bark flakes of plants such as Pinaceae, of which 30% by weight or more are 0.2 to 2 mm thick, and an upper layer consisting of the roots of the grass and roots extending from it; and a grass carpet consisting of a lower layer formed by intertwining the roots that extend from the roots of the middle layer of grass through the middle layer in a fabric-like manner.