JP2003310047A - Method for preserving surface layer soil containing buried seed and greening method using surface layer soil containing buried seed, and sandbag and vegetation mat storing surface layer soil containing buried seed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preserving surface layer soil containing buried seeds, and facilitating the promotion of greening, and to provide a greening method using the surface layer soil containing the buried seeds, and a sandbag and a vegetation mat storing the surface layer soil containing the buried seeds. <P>SOLUTION: The surface layer soil 1 containing the buried seeds is preserved in a state in which the soil has a water content by which the seeds cannot germinate. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preserving surface soil containing buried seeds, a revegetation method using the surface soil containing buried seeds, and a sandbag and a vegetation mat containing the surface soil containing buried seeds. .

[0002]

2. Description of the Related Art Bare slopes generated in the process of constructing and constructing roads in mountainous areas are eroded by raindrops and water currents if left unattended. , Prevent the erosion by grown plants,
I try to protect the slope. Then, when performing the greening of the slope, seeds such as exotic herbs and trees collected mainly at locations outside the development area were used.

However, in recent years, from the viewpoint of environmental protection, particularly ecological protection and prevention of gene disruption, a method for greening using seeds collected around the development area where roads and the like are to be constructed and constructed. Has been attempted, and as one method therefor, there is a method of collecting surface soil including buried seed in forests around the development area and using the collected soil.

[0004] In the above method, generally, after felling trees in a mountain forest, surface soil of the forest land is collected, and then road construction etc. is carried out, with respect to a bare surface slope generated in the process. The surface soil is used as a soil. The above-mentioned soil is usually carried out at the final stage of construction, and by growing buried seeds contained in the above-mentioned surface soil,
The greening of bare slopes will be achieved.

The above-mentioned method aims at greening by utilizing the vegetation around the development area, and since the bare slope can be surely adapted to the surrounding environment, it is a very desirable greening method. It has been attracting attention as it exists.

[0006]

However, the above greening method has the following problems. That is, there are cases where the surface soil is sampled and the above-mentioned soil is carried out after a short period of time, but most of the time is after 3 months or 6 months, and in the case of large-scale projects, after 1 year or more. is there. Then, during this period, most of the seeds contained in the collected surface soil germinate after germinating at the storage location and die, and at the time of carrying out the soil soil, seeds capable of germination and growth contained in the surface soil. Was a little. Therefore, it is difficult to promote greening by the above method.

The present invention has been made in view of the above matters, and an object of the present invention is to provide a method for preserving a surface soil containing a buried soil seed and a buried soil seed capable of easily promoting greening. It is intended to provide a greening method using a surface soil containing the soil, and a sandbag and a vegetation mat containing the surface soil containing the buried seed.

[0008]

In order to achieve the above object, a method for preserving surface soil containing embedded soil seeds according to the present invention is a method for preserving surface soil containing embedded seeds, in which the embedded seeds do not germinate. Save the data in a state having a rate (Claim 1).

[0009] Further, a dry soil improver may be added to the surface soil containing the embedded soil seeds, and the surface soil may be preserved in a state having a water content rate at which the embedded soil seeds cannot germinate (claim 2). ).

The greening method using the surface soil containing embedded soil seeds according to the present invention is a method for preserving the surface soil preserved by the method for preserving surface soil containing embedded seeds according to claim 1 or 2 on the surface to be replanted. Soil (claim 3).

The sandbag containing the surface soil containing the buried seed of the present invention contains the surface soil preserved by the method for preserving the surface soil containing the embedded seed according to claim 1 or 2. Item 4).

The vegetation mat of the present invention for containing the surface soil containing the buried seed contains the surface soil preserved by the method for preserving the surface soil containing the embedded seed according to claim 1 or 2 ( Claim 5).

According to the present invention having the above-mentioned structure, a method for preserving surface soil containing buried seeds, which facilitates greening, and a greening method using surface soil containing buried seeds, and It is possible to provide a sandbag and a vegetation mat that contain surface soil containing embedded seeds.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view schematically showing an embodiment of a method for preserving surface soil containing embedded soil seeds of the present invention (hereinafter referred to as preserving method). In the storage method, the surface soil 1 containing the collected buried soil seeds (not shown) is stored in a state of having a water content rate in which the buried soil seeds cannot germinate.

More specifically, in order to reduce the water content of the surface soil 1, a dry soil conditioner 2 (see FIG. 2) is used.
Is added to the surface soil 1 and both are mixed to form the surface soil 1
PF is at least 3.0 or more. That is, when the pF is 3.0 or more, most (or all) of the water content (water) in the surface soil 1 is not liquid but gas (water vapor). The buried seed contained in the surface soil 1 cannot absorb sufficient water for germination when the surrounding water is all gaseous (water vapor), so that the pF is 3.0 or more. In the surface soil 1, the seeds of the buried soil are not germinated. The pF of the surface soil 1 is 4.2 or more (that is,
Permanent wilting point or above) is desirable.

The surface soil 1 is, for example, 5 to 10 cm deep from the surface of the soil sampling area A adjacent to the surface N to be planted.
The soil is up to (for example, 5 cm) and contains the above-mentioned buried soil seeds and many nutrients and is suitable for revegetation. Specifically, the surface soil 1 is, for example, as shown in FIG. 2, an A ₀₀ layer in which old deciduous leaves are accumulated in order from the upper side,
A ₀ layer that contains decomposing leaves (humus), A ₁ layer that mixes humus and soil, A ₂ layer that lacks nutrients, and B ₂ layer that accumulates nutrients that have escaped and other soil components Of the soil in the soil collection area A that has, it consists of the soil of the A ₀₀ layer, A ₀ layer, and A ₁ layer.

The surface soil 1 is collected by, for example, vacuum suction by the vacuum suction means 3, and before this vacuum suction, the soil is preliminarily cultivated with a cultivator (only the cultivating claw is shown) 4. If the surface soil 1 in the collection area A is loosened, the surface soil 1 can be easily collected by vacuum suction.

The target surface N for greening is, for example, a bare slope surface generated in the process of constructing and constructing a road in a mountainous area.

The soil conditioner 2 is in the form of powder or particles, and is, for example, a mineral excellent in water absorption (a porous mineral such as vermiculite or perlite, a clay such as bentonite) or a calcium carbonate (lime carbonate). In addition to water-absorbing polymers (super-water-absorbing polymers), organic composts, chemical fertilizers, dry organic / inorganic materials such as wood pulp / vegetable fibers, etc. can be used alone or in combination.

The surface soil 1 and the soil conditioner 2 are mixed by mixing the surface soil 1 collected by vacuum suction as described above.
After adding the soil improver 2 to the soil, it may be performed by stirring both, but as shown in FIG. 2, before collecting the surface soil 1 by vacuum suction, the soil improver 2 is added to the soil. Even if it sprays on the surface layer part of the collection area A by using a blower type spraying machine (not shown), the soil improving material 2 and the surface layer soil 1 are cultivated (stirred). Good. In the latter case, surface soil 1
It is possible to easily improve the uniformity of mixing of the soil conditioner 2 in the above.

The surface soil 1 mixed with the soil conditioner 2 as described above is stored in a bag 5 or the like at a storage location R where it will not be exposed to rainfall (splashes with water). The storage location R is preferably, for example, a warehouse, but it may be covered outdoors with a sheet so as not to be exposed to rainwater.

In the storage method having the above-mentioned constitution, since the surface soil 1 is stored in a state where the moisture content is reduced, the buried seed contained in the surface soil 1 does not germinate and die during storage. . Therefore, greening can be easily achieved by applying the surface soil 1 stored by the storage method to the greening target surface N.

Generally, it is desirable to store seeds in a dark place or a cold place. Even in the storing method having the above-mentioned constitution, the storage place R of the surface soil 1 is a dark place or a cold place. It is desirable to select.

In addition, in the above-mentioned embodiment, in order to reduce the water content of the surface soil 1, the dried soil conditioner 2
Are mixed in addition to the surface soil 1, but the present invention is not limited to such a configuration. For example, the surface soil 1 is dried in the sun (exposed to the sun and dried), or jetted. The surface soil 1 may be dried by applying hot air using a device such as a heater. Further, for example, a part of the surface soil 1 previously dried by the above-mentioned drying method (that is, sun drying or hot air drying) is added to another newly collected surface soil 1, and both are mixed. By doing so, the water content of the surface soil 1 may be reduced. And, of course, the surface soil 1 and the soil improving material 2 may be mixed and dried by the above-described drying method. In this case, the soil improving agent 2 may be added after drying only the surface soil 1 by the above drying method, or the soil improving agent 2 may be dried by the above drying method in a state of being mixed. Good. In the latter case, it is not necessary to dry the soil conditioner 2 used.

FIG. 1 is also an explanatory view schematically showing an embodiment of a revegetation method (hereinafter referred to as a revegetation method) using a surface soil containing buried soil seeds of the present invention. The above-mentioned greening method is applied to the surface soil 1 including the buried seeds collected from the soil collection area A.
Is stored in the storage location R in a state in which the embedded soil seeds have a water content rate that prevents germination, and the surface soil 1 stored in the storage location R is composed of a vehicle such as a truck. The transporting means T transports the surface N to be green to the vicinity thereof, and then carries the soil to the surface N to be greened.

The storing step can be performed based on the above storing method. Specifically, the storage step includes a spraying step of spraying the soil improving material 2 on the soil sampling area A,
A mixing step of stirring and mixing the surface soil 1 and the soil improving material 2 while excavating the surface soil 1 in the soil collecting area A, and a collecting step of collecting the surface soil 1 mixed with the soil improving material 2 And a storage step of storing the collected surface soil 1 in the bag body 5.

The spraying of the soil conditioner 2 in the spraying step is performed, for example, by a blower type spraying machine (not shown).
Is performed using.

For the excavation of the surface soil 1 in the mixing step, for example, the cultivator (only the cultivating claw is shown) 4
It is performed by loosening the surface soil 1 by the above method.

The surface soil 1 is collected in the collecting step by, for example, vacuum suction by the vacuum suction means 3.

The storing step may be performed at a site where the surface soil 1 is collected, or after the surface soil 1 is transported to a place other than the site, for example, after the surface soil 1 is transported to the storage place R, the storage place R is stored. It may be performed inside or in the vicinity thereof.

In the storage step having the above-mentioned structure, a drying step of drying the surface soil 1 by the sun or by applying hot air may be separately provided before the storing step.

Further, the spraying step may be omitted in the storing step having the above structure. In this case, the preservation step includes a sampling step of excavating and collecting the surface soil 1 in the soil sampling area A, a mixing step of adding the soil improving material 2 to the collected surface soil 1 and mixing the two, and a soil. Improvement material 2
And a storage step of storing the surface soil 1 mixed with the bag body 5 in the bag body 5. Further, in this case, instead of the mixing step or in addition to the mixing step, a drying step of drying the surface soil 1 by sun-drying or by applying hot air may be provided.

The soil of the surface soil 1 in the soil processing step is, for example, a spraying means 6 such as an air type conveying and spraying device.
By spraying (spraying) the surface soil 1 on the surface N to be replanted. In this case, a net is stretched if necessary and sprayed from above, and the spray thickness is, for example, 1
It is preferable that the length is -5 cm. In addition, vegetation base materials such as bark compost and peat moss, and soil improving materials such as fertilizers and water retaining materials are mixed with the surface soil 1 as required.

The method of applying soil to the surface soil 1 is not limited to the spraying, and for example, it may be sprinkled, and the sandbag 7 containing the surface soil 1 (FIG. 3).
By laying (A)) or the vegetation mat 8 (see FIG. 4) on the surface N to be planted, the surface soil 1 may be used as a soil.

Here, when the soil of the surface soil 1 is sprayed (sprayed or sprinkled), the surface soil 1 after spraying is prevented in order to prevent the surface soil 1 from being blown off by wind or the like. It is desirable to spray water at the same time as spraying. Moreover, you may perform this spraying of water by making the surface soil 1 before spraying contain water.

FIG. 3A is an explanatory view schematically showing the structure of the sandbag 7. The sandbag 7 contains the surface soil 1 stored in the storage step (or the surface soil 1 stored by the above storage method) inside,
As the material, hemp fibers such as heshan cloth, palm fibers, and corrosive fibers such as light or biodegradable plastic fibers are preferably used for environmental protection.

The sandbag 7 is laid so as to be attached to the green surface N as shown in FIG. 3B, or the green surface N as shown in FIG. 3C. It is laid in a laminated state.

The sandbag 7 may also be used as the bag 5. That is, in this case, the surface soil 1 whose water content has been reduced by the method described above is stored in the storage location R in a state of being stored in the sandbag 7.

4 and 5 are an explanatory view and a longitudinal sectional view schematically showing the structure of the vegetation mat 8. The vegetation mat 8 is the surface soil 1 preserved in the preservation step.
(Or surface soil 1 preserved by the above preservation method)
And a seat portion 10 for holding a plurality of the accommodating portions 9.

As an example of the vegetation mat 8, the accommodating portion 9 is composed of a vegetation bag having the surface soil 1 preserved in the preservation step accommodated therein, and the sheet portion 10 is a coarse net ( (For example, palm net)
10a and a biodegradable net 10b, the biodegradable net 10b is superposed on one surface of the coarse net 10a, and the housing portion 9 is sandwiched between the nets 10a and 10b at an appropriate interval. , And these are integrally sewn with a suture thread 11.

The accommodating portion 9 has a long bag shape,
The plurality of storage portions 9, 9 ... Held on the seat portion 10
Are arranged so as to be parallel to each other. Although the accommodating portions 9 are sandwiched at intervals in FIGS. 4 and 5, they may be continuously sandwiched at no intervals.

The coarse net 10a is, for example, 1 to
A twisted cord of 10 mm diameter palm fiber is knitted and woven so as to be 5 to 15 per 10 × 10 cm.

A biodegradable cloth piece may be used in place of the biodegradable net 10b.

The suture thread 11 is, for example, a thread of biodegradable synthetic resin fiber.

Then, the vegetation mat 8 is laid on the greening target surface N such that the lengthwise direction of each housing portion 9 substantially coincides with the contour line of the greening target surface N.

The accommodating portion 9 may also be used as the bag body 5. That is, in this case, the surface soil 1 whose water content has been reduced by the above-described method is used as the vegetation mat 8
It is stored in the storage location R in a state of being stored in the storage portion 9. The accommodating portion 9 of the surface soil 1 is not limited to the long bag shape, and may be formed into a small bag shape to be sandwiched. Further, the accommodation portion 9 formed in a pouch shape may be accommodated in the seat portion 10 (specifically, one or both of the nets 10a and 10b) by appropriately forming a pocket portion. Further, the vegetation mat 8 may be formed in a mat shape by sandwiching the surface soil 1 between a plurality of (for example, two) sheet bodies like the vegetation mat disclosed in JP-A-6-57754.

[0047]

In the storage method having the above-mentioned constitution, since the surface soil 1 used for greening is stored in a state where the moisture content is reduced, the buried seed contained in the surface soil 1 is germinated during storage. It will not die and the surface soil after storage 1
It becomes easy to promote greening by using.

In the greening method having the above structure,
After the surface soil 1 is stored in a state where the moisture content is reduced, it is applied to the surface N to be replanted, and the embedded seeds contained in the surface soil 1 may germinate and die during the storage. Since it is possible to secure the seeds for germination and growth contained in the surface soil 1 from the time of collecting the surface soil 1 to the time when the above-mentioned soil is carried out, the buried seeds contained in the surface soil 1 are effective. It can be used to make greening easier.

Further, in the sandbag 7 and the vegetation mat 8 having the above-mentioned constitution, the surface soil 1 which is preserved in the preservation step or the preservation step of the revegetation method in a state where the embedded seed contained therein is not germinated is accommodated. Therefore, as compared with the conventional sandbags and vegetation mats that contain the surface soil 1 that has been preserved without being subjected to the treatment to reduce the water content, it is necessary to accommodate more seeds that can be germinated and grown. Therefore, by laying on the greening target surface N, greening can be achieved more effectively and easily.

As described above, according to the present invention, a method for preserving surface soil containing embedded soil seeds capable of facilitating greening and a greening method using surface soil containing embedded soil seeds are provided. Also, it is possible to provide a sandbag and a vegetation mat that accommodates surface soil containing embedded soil seeds.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing an example of a method of preserving a surface soil containing embedded soil seeds and a greening method using the surface soil containing embedded soil seeds of the present invention.

FIG. 2 is an explanatory diagram schematically showing a situation at the time of collecting surface soil.

FIG. 3A is an explanatory view schematically showing the configuration of a sandbag, and FIGS. 3B and 3C are explanatory views schematically showing one example and another example of a method for laying a sandbag.

FIG. 4 is an explanatory view schematically showing the structure of a vegetation mat.

FIG. 5 is a vertical sectional view schematically showing the structure of the vegetation mat.

[Explanation of symbols]

1 ... Surface soil.

Claims (5)

[Claims] 1. A method for preserving surface soil containing embedded seeds, which comprises storing the surface soil containing embedded seeds in a state of having a water content that prevents the embedded seeds from germinating. 2. A buried soil characterized by adding a dry soil improver to a surface soil containing embedded soil seeds, and storing the surface soil in a state of having a water content rate at which the embedded seeds cannot germinate. Method for preserving surface soil containing seeds. 3. A revegetation method using a surface soil containing embedded soil seeds, which is the soil to be replanted on the surface soil preserved by the method for preserving surface soil containing embedded soil seeds according to claim 1 or 2. 4. A sandbag containing the surface soil preserved by the method for preserving the surface soil containing the buried seed according to claim 1 or 2. 5. A vegetation mat containing the surface soil preserved by the method for preserving the surface soil containing the buried seed according to claim 1 or 2.