JP7165343B2 - Climbing plant invasion prevention method and vine invasion prevention groove - Google Patents

Description

The present invention relates to a method for preventing invasion of climbing plants and an invasion-preventing groove provided for preventing the invasion of said climbing plants.

Kudzu (Pueraria Iobata Ohwi) is a perennial plant that can be cultivated anywhere, such as railroad tracks, roads, plantations, parks, grasslands, riverbeds, etc., and has extremely vigorous growth. It expands its distribution area over time and becomes a priority species in a few years. As a result, it causes complaints from neighboring residents due to the deterioration of the aesthetic appearance due to the covering wrapped around useful trees and the extension outside the site, and the visibility of traffic safety facilities is reduced by climbing and covering road signs. causing various damages such as
Furthermore, in a biotope constructed with the aim of preserving biodiversity, once the kudzu grows thick, the sun's rays will not reach the undergrowth, which will significantly hinder its growth and prevent normal vegetation succession. As a result, the definition of a space inhabited by diverse organisms is lost. Kudzu vines extend horizontally to expand their habitat, so they not only entangle undergrowth and suppress their growth, but also cause herbaceous species to wither and die due to the effects of the shade brought by their large leaves. . Especially in the firefly biotope, firefly adults tend to lay their eggs on the underside of relatively low undergrowth. will suffer fatal injuries.

By the way, current countermeasures against weeds such as kudzu include the following.
(b) Root weeding and mowing Root weeding is a method of manually pulling out weeds from the roots, and weeding is a method of cutting the above ground portion using a machine or sickle. The features of the former are: excellent appearance and long-lasting effect, but it takes time and effort. The latter feature is that although it is effective in areas with large weeding areas, the effect is temporary because rhizomes remain. In any case, it is necessary to carry out frequently during the summer growing season.
(b) Spraying herbicides This is a method of using chemicals to inhibit the germination and growth of weeds or kill them. It is necessary to pay attention to the influence on useful plants. Generally, once sprayed, the effect is said to last for several months. However, if a larger amount than the standard amount is sprayed in order to maintain the effect as long as possible, it will conversely remain in the soil and may contribute to environmental destruction.
(C) Covering with gravel and crushed stone Artificially processed crushed stone or gravel that has become smaller due to the force of nature is laid down. If the construction accuracy is high, it is said that the effect will be exhibited for 3 to 5 years. However, since the crushed stone and gravel gradually sink under their weight, the soil relatively rises to the surface, resulting in the rapid growth of weeds. In addition, when fallen leaves fall on the gravel, they cannot be swept away, and the only means is to remove them one by one by hand, which is quite troublesome.
(d) Covering with weed prevention sheets (grass prevention sheets, multi-layered sheets) Weed prevention sheets are a method of suppressing weeds by physically covering the topsoil. Since the color of the sheet is basically black, it becomes an artificial landscape. In addition, weeds can invade through the seams of the sheets, and the effect of suppressing weeds depends on the accuracy of construction.
A multi-layer sheet covers the topsoil with a fibrous sheet to control weeds, and at the same time, plants are planted in holes to use the sheet as a greening base. Costs are high due to the need for constant maintenance. As a result, it lacks versatility as a weed control technology because its application is limited.
The useful life of the weed control sheet and covering sheet is about 5 years.
(v) Covering with a solidifying material, etc. A material that solidifies when it reacts with water, and has a color similar to that of soil, giving a natural impression to the landscape. In addition, the weed control effect is higher than that of the above methods. It is desirable that the thickness of the bed should be about 5 cm or more, and since it is essential to lay the foundation gravel under it to maintain the horizontality, it is necessary to ask a specialist. Therefore, the cost becomes high accordingly.

By the way, it is considered difficult to adopt the above methods (b) to (e) for fields that require biodiversity conservation from the viewpoint of ecosystem maintenance and conservation and natural succession of vegetation. .
Therefore, as a weed control method for a biotope, it is the current situation that there is no choice but to use the management method in which the method (a) is carefully and steadily performed.
However, with method (a), it is necessary to frequently remove weeds and weeds during the growing season in summer. It was necessary to ensure the safety of those involved.
Therefore, an effective, efficient, safe and secure weed control method is required.

The present invention has been made in view of the problems of the prior art. It is an object of the present invention to provide an anti-intrusion groove that is

As a result of intensive studies, the present inventors have found that since lianas have thin and flexible stems, it is difficult for them to support their own weight, and therefore they cannot grow horizontally against gravity. If a ditch of a certain width or more is provided between the vine habitat and the pre-designated protected area,
The inventors have found that it is possible to prevent climbing plants from entering protected areas, and have arrived at the present invention.
That is, the present invention provides the stem portion of the climbing plant (hereinafter referred to as It is characterized by providing an invasion prevention groove having a width dimension of 50 cm or more and 200 cm or less and a depth dimension of 50 cm or more and 150 cm or less for preventing invasion of vines.
As a result, invasion of vines can be prevented without relying on chemicals such as herbicides, so that protected areas can be protected from damage by vines without imposing a burden on the environment.
In addition, the present invention is provided between a habitat area of climbing plants and a pre-designated protection area,
The entry-preventing groove for preventing invasion of the vines of the climbing plant, wherein the entry-preventing groove has a width dimension of 50 cm or more and 200 cm or less, and a depth dimension of the invasion prevention groove is 50 cm or more and 150 cm. It is characterized by the following.
By providing such invasion-preventing grooves, vines cannot cross the invasion-preventing grooves, so that it is possible to reliably prevent creeping plants from entering the protected area.
In addition, since the length of the groove can be shortened by setting the extension direction of the invasion prevention groove in the horizontal direction and in the direction perpendicular to the extension direction of the vine of the climbing plant, the invasion of the climbing plant can be efficiently prevented. can do.
In addition, since the creeping plants dislike water, if water is retained in the invasion-preventing grooves, the invasion of the climbing plants can be effectively prevented. It should be noted that the water in the intrusion prevention groove does not necessarily have to be circulating water, and may be rainwater collected at the bottom of the groove.

It should be noted that the summary of the invention does not list all the necessary features of the present invention, and subcombinations of these feature groups can also be inventions.

It is a figure which shows this Embodiment. FIG. 4 is a diagram showing an experimental method for setting the groove width of an intrusion prevention groove; FIG. 5 is a diagram showing the relationship between the groove width of an intrusion prevention groove and the state of extension of debris. It is a table|surface which shows an experimental result. It is a figure which shows the invasion|invasion state of waste.

FIG. 1 is a diagram showing this embodiment, in which 1 is a pre-designated protected area such as a biotope, 2 is a habitat for kudzu 3, which is a climbing plant, and 4 is a protected area and a habitat for kudzu. 2 is a concrete groove with a U-shaped cross section. 4a is the side wall of the dwarf invasion preventing groove 4 on the side of the habitat 2 of the dwarf 3, 4b is the side wall on the protected area 1 side, and 4c is the bottom.
In this example, the width dimension W of the dust entry prevention groove 4 is in the range of 50 cm≦W≦200 cm.
The reason why the lower limit of the width dimension W is set to 50 cm is that the stem of the kudzu 3 (hereinafter referred to as the vine 3L) is thin and soft. This is because it becomes difficult to support the body and cannot be stretched horizontally. The reason why the upper limit of the width W is set to 200 cm is that even if the width of the groove is increased further, the effect of preventing the dust 3 from entering does not change.
At this time, it is preferable that the extending direction of the invasion-preventing groove 4 is perpendicular to the extending direction of the climbing plant. As a result, the length of the intrusion prevention groove 4 can be shortened, so that the intrusion of climbing plants can be efficiently prevented.
If the debris entry prevention groove 4 is too shallow, the tendrils 3L that have entered the entry prevention groove 4 may climb the side wall 4b on the protected area side and enter the protected area 1 even if the groove width W is wide. be. In this example, by setting the depth D of the debris entry prevention groove 4 to 50 cm or more, even if the tendrils 3L enter the entry prevention groove 4, they are prevented from entering the protected area 1.例文帳に追加A groove depth of 100 cm is sufficient, and even if the groove is deeper than 100 cm, the effect of preventing the debris 3 from entering does not change.

2(a) and 2(b) are diagrams showing an experimental method for setting the groove width of the intrusion prevention groove. In the experiment, a test groove 6 was provided in a test section 5 for growing kudzu, and seedlings of kudzu 7 were planted on one side of the test groove 6 in the width direction (hereinafter referred to as the kudzu inhabited side 5a). It was observed whether or not the grown scraps 7 invaded the other side of the test groove 6 in the width direction (hereinafter referred to as the protective area side 5b).
Seedlings of Kudzu 7 are sown in a pot with an inner diameter of 9.5 cm and a depth of 8.5 cm filled with a mixture of paddy rice culture soil, leaf soil, turf grout, and red soil, and placed in a glass greenhouse under natural light. Among the plants grown with watering until they had 8 trifoliate compound leaves, plants with a length of about 10 cm from the base of the vine to the tip of the vine were used.
The test groove 6 is a rectangular parallelepiped groove having a length of L = 180 cm, a depth of D = 75 cm, and a width of W made using a plywood board having a thickness of 12 mm. W was set to four types of 25 cm, 50 cm, 75 cm, and 100 cm, and four test sections 5 were provided, and test grooves 6 having different widths W were prepared for each test section 5 .
Seedlings of kudzu 7 are placed at a point a = 45 cm away from the position of the side wall 6a on the side 5a of the kudzu inhabitation side of the test groove 6, so that the seedling in the middle is on the extension of the center line in the longitudinal direction of the test groove 6. , b = 30 cm apart, and a total of 3 strains were planted in the ground.

3 (a) to (d) are diagrams showing the elongation of crumbs in test grooves with groove widths W of 25 cm, 50 cm, 75 cm, and 100 cm, respectively. is a diagram.
As shown in FIG. 3, a large number of tendrils climbed over the test groove 6 in the test section with a width W of 25 cm.
On the other hand, in the other test plots, no vines that climbed over the test groove 6 were observed.
Details of the experimental results are shown in the table of FIG.
The "number of samples" in the table refers to the number of vines that have entered the test groove 6 and whose length has reached the groove width W plus the distance from the base of the plant to the groove (45 cm) (hereinafter referred to as vines).
Further, "the number of vines that climbed over the groove" is the number of test vines that climbed over the test groove 6 and reached the protected area 5b side, as shown in Fig. 5(a). The number of vines” is the number of test vines that reached the bottom surface 6c of the test groove 6 but could not climb over the test groove 6, as shown in FIG. 5(b). Also, as shown in FIG. 5(c), the "number of vines in state B" indicates the number of test vines that reached the side wall 6b on the protected area 5b side of the test groove 6 but could not climb over the test groove 6. is a number. In addition, as shown in the same table, the average length and average thickness of the vines are almost the same in each test plot.
As shown in the table of FIG. 4, eight of the 17 test vines climbed over the test groove 6 in the test section where the groove width W was 25 cm. On the other hand, in the test plots with widths W of 50 cm, 75 cm, and 100 cm, none of the test vines climbed over the test groove 6 .
As a result, it was confirmed that the kudzu vines could not climb over grooves with a groove width of 50 cm or more.
It should be noted that when the groove width W increases, the number of vines reaching the side wall 6b on the side of the protected area 5b decreases, and the number of test vines that stop at the bottom surface 6c of the test groove 6 increases. I also found out.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is also obvious to those skilled in the art that various modifications and improvements can be made to the above embodiments. It is clear from the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the invention.

For example, in the above-described embodiment, vines are used as kudzu.
In addition, since the creeping plants dislike water, if water is stored in the invasion prevention groove 4, the effect of preventing the invasion of the climbing plants can be further enhanced. The water may be rainwater or the like. When water is stored in the entry-preventing groove 4, it is preferable to provide a drainage hole communicating with sewage or the like in the entry-preventing groove 4 so that the water does not overflow from the entry-preventing groove 4.
In addition, in the above-described embodiment, the entry prevention groove 4 is made of concrete. Concrete grooves are excellent in durability, but plate material is more advantageous when recreating the waste entry prevention grooves 4, such as when the waste distribution has changed.

1 protected area, 2 kudzu habitat, 3 kudzu (vines), 4 anti-intrusion ditches,
4a, 4b sidewalls, 4c bottom.

Claims (4)

Between the habitat of the climbing plants and the pre-designated protected area,
A width dimension of 50 cm or more and 200 cm or less for preventing invasion of the vines of the climbing plant,
A method for preventing invasion of climbing plants, characterized by providing an invasion-preventing groove having a depth of 50 cm or more and 150 cm or less. A groove provided between a climbing plant habitat area and a pre-designated protected area for preventing invasion of the climbing plant vines ,
The width dimension of the intrusion prevention groove is 50 cm or more and 200 cm or less,
In addition, the penetration prevention groove for climbing plants is characterized in that the penetration prevention groove has a depth dimension of 50 cm or more and 150 cm or less. 3. The groove for preventing invasion of climbing plants according to claim 2, wherein the extending direction of the groove for preventing invasion is horizontal and perpendicular to the extending direction of the tendrils of the climbing plant. 4. The groove for preventing invasion of climbing plants according to claim 2 or 3, wherein water is stored in the groove for preventing invasion.

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