JPH0255563B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is useful for improving the aesthetic appearance of the sides of expressways, slopes cut from mountainsides, slopes of river embankments, etc. that are covered with tall grass and other weeds. This invention pertains to a greening method for converting slopes into green slopes that do not allow weeds to overgrow, in order to prevent them from becoming a nest for pests and causing trouble to people's homes.

Conventional technology Greening work with grass, pastures, and other plants is popular on slopes such as expressway slopes, mountainside cut slopes, and river embankment slopes for the purpose of preventing topsoil erosion and maintaining aesthetic appearance. It is becoming more and more common to do so.

Problems that the invention aims to solve However, as time passes, even the slopes that have been greened become infested with weeds such as tall grass, which replaces short plants such as grass, spoiling the aesthetic appearance. This has led to various problems, such as the weeds becoming a perfect home for pests, being prone to fires when they wither in winter, and requiring a lot of manpower to cut down the weeds. Ta.

The present invention was made in consideration of these circumstances in slope greening, and while preventing and suppressing the infestation of weeds on slopes, it also allows only the planned growth of grass, grass, or other shallow-rooted dwarf plants. It is an object of the present invention to make it possible to easily remove the above-mentioned damage caused by the overgrowth of weeds from a greening slope.

Means for Solving the Problems The present invention is to cover the slope surface with a highly light-shielding sheet or pine in a close manner after the vegetation has been cut down as completely as possible from the roots, and then to This is a slope greening method that allows grass and other shallow-rooted plants to grow while maintaining a shallow layer of soil (artificial soil is also acceptable) using added soil or top soil.

Sheets or mats with high light-shielding properties include black or opaque synthetic resin sheets, pine-shaped sheets made by pressing palm husks side by side, straw mats, fine opaque synthetic resin nets, etc. , or those of the same type or different types may be appropriately superimposed on each other as necessary.

In addition, as a method for growing shallow-rooted plants such as specified grass while maintaining a shallow soil layer on the sheet or pine, there is a common method of spreading grass containing soil in the rhizomes using top soil. Various currently used methods can be selected and used as appropriate, such as the method of laying a net and spraying soil containing seeds or artificial soil.

Function: By tightly covering the slope surface after the vegetation has been cut with a light-shielding sheet or pine, sunlight is blocked from the roots of the cut vegetation. The sprouts from the roots of the vegetation are suppressed as much as possible, and even if there are some sprouts, they are physically suppressed by the sheet, etc., so they are less likely to sprout up to the top of the sheet, and the plants die. The possibility is great.

In addition, even if the seeds of other deep-rooted weeds fly to the growth base of grass or other shallow-rooted plants that have newly started to grow on the sheet or pine, the soil layer of the base is shallow and the roots are deep-rooted. It has become difficult for weeds to grow, and even if the roots try to penetrate deep into the slope, they will be obstructed by sheets, etc., making it difficult to grow properly.

Example 1 Figure 1 shows a light-shielding sheet or mat 2
As a method, one or several pieces of coconut shell pine with high porosity are made into a pine-like shape with a thickness of about 10 mm while spreading the coconut shell fibers and fixing the tangled state of the fibers with a synthetic resin. A synthetic resin film is pasted on the bottom surface of the bottom layer or a synthetic resin sheet is polymerized to make it difficult for rainwater to penetrate to the slope 1 and to make it easier for the grass roots to wither after being cut. For shallow-rooted plants, use ordinary lawn grass 3, which contains soil in the rhizomes and is obtained by cutting the lawn to an appropriate size. That's what I do.

As mentioned above, after all the vegetation including weeds has been cut, the palm pine is laid on the slope 1, and then the grass 3 is spread on the palm pine with a small amount of top soil. By pasting the grass, as mentioned above, it is difficult for regrown weeds to sprout from the cut weeds, and it is also difficult for weeds to grow due to newly introduced seeds, resulting in a clean green slope where only grass can grow. become.

Example 2 In this example shown in FIG. 2, the light-shielding sheet or mat 2 is made of opaque synthetic resin.
Several layers of netting with a mesh diameter of about 1 mm are used, and the shallow soil layer and shallow-rooted plants to be placed on the sheet or pine are turf with soil 3, which is used in the ordinary turf method as described above. It is. In this case, the synthetic resin net does not have a synthetic resin film pasted on the underside or a synthetic resin sheet polymerized as in the above-mentioned coconut shell pine, so its function to prevent rainwater from penetrating into the slope is limited. Although you cannot expect much from netting, if you stack several layers, they have considerable physical strength and can prevent the passage of regenerating weed buds and new weed roots, and combined with their light blocking properties, they can significantly suppress weeds. Becomes able to interfere with regeneration and new growth.

Of course, as mentioned above, by pasting a synthetic resin film on the bottom surface of the net or by layering synthetic resin sheets, it is possible to completely prevent rainwater from penetrating the slope, and to eradicate the roots of cut weeds. It is also possible to adopt a method of promoting this.

Example 3 In this case shown in FIG. 3, the turf method is used as a method for growing shallow-rooted plants on the sheet or pine 3, as described above, but as the light-shielding sheet or pine 2, shallow-rooted plants such as grass are grown on a straw mat. Use the seeds of root plants attached. This straw mat blocks the sun's rays and prevents regrowth from the roots of the cut vegetation as much as possible, and the growth of grass etc. that germinated from the pasted seeds is accompanied by the growth of grass 3 and other weeds. Since the regeneration and new growth of grass are competitively suppressed, there is almost no room for weeds other than grass or grass to grow, and their growth is naturally suppressed. In this case as well, in order to completely kill the roots of the cut weeds, it is also a good idea to overlay a waterproof synthetic resin sheet on the lowermost surface of the straw mat, as described above.

Example 4 In this case shown in FIG. 4, the sheet or mat 2
The shallow-rooted plants to be grown on top are the grass 3 produced by the turf method as described above, but as the light-shielding sheet or pine 2 covering the slope 1, an opaque synthetic plastic sheet of black color or the like is used. There is. In addition to its light-shielding properties, this plastic sheet has waterproof properties that completely prevent water from penetrating into the slope, so the roots of cut plants are cut off from both light and water supply, causing their growth. There is no risk of weeds reproducing from the roots.

In this case, in order to prevent the grass pasted onto the plastic sheet from sliding down the sheet, crosspieces 4 made of inexpensive plastic such as styrofoam are placed horizontally at appropriate pitches. While fixing the plastic sheet on the sheet, taking into consideration that the plastic sheet can hardly be expected to have the same soil retention ability as the sheet or pine in the above-mentioned embodiment, the soil for growing grass should not be insufficient. To do this, add 2 layers of top soil on top of the grass.
It is designed to be placed up to a thickness of about cm.

Effects of the Invention As is clear from the above description, the present invention has the following effects.

B. Weeds growing on the slope can be eradicated and new weeds can be prevented from taking root, allowing only shallow-rooted plants such as grass and grass to grow, creating a beautiful landscape and preventing pests from nesting. It becomes possible to obtain an efficient slope greening work that requires less manpower to cut weeds.

(b) The method itself is simple and requires only inexpensive commercially available materials, making it an extremely economical method.

[Brief explanation of the drawing]

FIGS. 1, 2, 3, and 4 are partially cutaway perspective views of longitudinal sections of slopes according to the embodiments of the present invention. 1...Slope, 2...Light-shielding Sheet or pine, 3... Grass, 4... Crosspiece, 5... Top soil.

Claims (1)

[Scope of Claims] 1. After cutting vegetation, the slope is tightly covered with a light-shielding sheet or pine, and then a shallow soil layer is maintained on the sheet or pine while grass or other shallow-rooted grass is grown. A slope greening method characterized by growing plants. 2. The slope greening method as set forth in claim 1, wherein the sheet or mat is a mat made of coconut shell with a waterproof coating applied to the back side. 3. The slope greening method as set forth in claim 1, wherein the sheet or mat is a mat made of coconut shell with a polymerized waterproof sheet on the back side. 4. In the slope greening method described in claim 1, the sheet or mat is made by superimposing several thin synthetic resin nets. 5. The slope greening method according to claim 1, wherein the sheet or pine is a straw mat with seeds of shallow-rooted plants pasted on it. 6. The slope greening method according to claim 1, wherein the sheet or pine is a synthetic resin sheet.