JPH0684628B2 - Soil improvement bag - Google Patents

Description

TECHNICAL FIELD The present invention relates to a soil improvement bag used for improving acidic soil that is harmful to the growth of plants, for example, on greening of slopes.

[Conventional technology]

Generally, improvement of acidic soil is performed by a method of spraying powder of slaked lime or calcium carbonate and stirring with soil.

This soil improvement method dissolves powder of slaked lime and calcium carbonate in the water in the soil, and the effect of soil improvement by neutralization reaction is exerted early, so it is very effective when greening the horizontal ground of acidic soil. Is.

However, when the construction target is a slope, not only is it difficult to mix with soil because it is difficult to mix, but slaked lime and calcium carbonate easily flow out due to rainfall, so even if short-term effects can be expected, long-term effects can be expected. It was difficult to maintain vegetation.

[Problems to be solved by the invention] In view of the above situation, the present invention is easy to construct even on the slope, and the effect of soil improvement by the neutralization reaction is early,
Moreover, the purpose of the present invention is to provide a soil improvement bag that can be used for a long period of time.

[Means for Solving the Problems]

The technical means taken by the present invention to achieve the above object are as follows.

That is, the characteristic feature of the soil improving bag according to the first aspect of the present invention is that the soil improving agent in which granular calcium carbonate having different particle diameters is mixed is contained inside the water-permeable bag. As the bag, a mesh having a small mesh can be used.

A feature of the soil improving bag according to the second invention is that a soil improving agent in which granular calcium carbonate having different particle diameters is mixed is contained in a bag body formed of a sheet obtained by laminating a coarse net and a water-soluble film. Especially.

In both the first invention and the second invention, it is desirable for the growth of vegetation to use a soil-improving agent containing a chemical fertilizer and a water retention agent as a soil-improving agent to be contained in the bag. Further, vegetative seeds such as grass seeds, flower seeds and native plant seeds can be mixed and carried out.

[Action]

According to the configurations of the respective inventions described above, when the acidic soil harmful to the growth of the plant is improved, even if the construction object is a slope, the soil improvement bag can be easily constructed by laying in a contour line.

Then, in the state where the soil improvement bag is laid, among the granular calcium carbonate contained in the bag body, the one having a small particle size is first dissolved in rainwater or water in the soil and penetrates into the soil, The effect of soil improvement by the neutralization reaction is demonstrated early, and the large particle size has a small surface area per unit weight and gradually elutes, so the effect of soil improvement is sustained for a long time. Will be done.

Particularly, according to the constitution of the second invention, since the bag body is constituted by the sheet-like member obtained by laminating the coarse net and the water-soluble film, the water-soluble film is spilled to the outside of small calcium carbonate particles. It prevents the bag from being taken out, and the coarse net bears the strength of the bag body, which makes it easy to handle the soil improvement bag during transportation or laying.

Still, in the state where the soil improvement bag is laid on the slope, for example, when there is rainfall, the water-soluble film is dissolved by raindrops and the slope and the soil improvement bag are well integrated, and calcium carbonate and acidic soil It will promote the neutralization reaction.
Further, since the water-soluble film is dissolved, there is no fear that the germination of vegetation seeds and the growth of roots will be hindered.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, A indicates a soil improvement bag. This soil improvement bag A has a water-permeable elongated shape, for example, a diameter of
The soil conditioner 2 is contained in a bag 1 having a length of 2.5 to 10.0 cm and a length of 100 to 200 cm. As the soil improver 2, a mixture of granular calcium carbonate having different particle diameters, specifically, limestone is crushed to have a particle diameter of 0.3 to 0.8.
mm, 0.8 to 1.5 mm, and 1.5 to 5.0 mm may be mixed in equal amounts, but in this embodiment, the chemical fertilizer 3 and the water retention agent 4 are further mixed. There is. The amount of calcium carbonate contained in the bag body 1 can be set arbitrarily, and varies depending on the diameter of the bag body 1.
It is practically desirable to set the length to about 50 to 1000 g per 1 m.

As the chemical fertilizer 3, one kind or several kinds can be appropriately selected and used from slow-acting, slow-acting, and ultra-slow-acting fertilizers. The most preferred embodiment is to use a mixture of all the above types.

As the water retention agent 4, one type or several types can be appropriately selected and used from inorganic type such as vermukilite and perlite, and organic type such as bark compost and peat moss. The most preferred embodiment is to use a mixture of inorganic and organic water retention agents.

The bag 1 may be, for example, a net having a mesh smaller than the minimum particle size of calcium carbonate, but as shown in FIG. 2, a sheet obtained by laminating a coarse net 5a and a water-soluble film 5b. It is desirable to use the one formed by the member 5. In this case, as the coarse net 5a, for example, a large mesh (for example, 2 to 20) made by plain weaving a flat yarn of plant fiber or chemical fiber (for example, polyester or polypropylene) that is difficult to be dissolved by water
mm) net (so-called split cloth) is used. The water-soluble film 5b may be a polymer-based or starch-based film that dissolves in water, but in the illustrated embodiment, a non-woven fabric having excellent dispersibility in which fibers are bonded with a water-soluble binder, specifically For example, a fiber having a thickness of 1.5 denier and a length of 51 mm is made of a water-soluble binder such as polyvinyl alcohol (PVA) having a low degree of polymerization so that the material ratio is 80%, the binder is 20%, and the basis weight is It is used in such a manner that it is bonded to about 23 g / m ² .

In addition to the chemical fertilizer 3 and the water retention agent 4, vegetative seeds such as grass seeds, flower seeds and native plant seeds may be mixed in the soil conditioner 2.

Next, some methods of using the soil improvement bag A will be described.

First, as shown in FIG. 3, the soil improvement bags A are laid in contour lines at appropriate intervals on a slope 6 such as a road. still,
On the slope 6, beforehand, a step portion or a groove portion 7 as shown in the figure is formed by excavating at a planned laying position of the soil improving bag A, and the soil improving bag A is laid on the step portion or the groove portion 7. However, it is preferable for facilitating the penetration of calcium carbonate into the solution.

After laying the soil improvement bag A, a net 8 on the slope 6 as shown in the figure.
The vegetation base material B, which is a gel of vegetation seeds, fertilizers, water retention agents, etc., is sprayed and the slope 6 is greened.

The soil improvement bag A and the net 8 are anchors 9 as described later.
Although the pegs 10 and nails 10 are driven into the slope 6 and fixed, the fixing of the soil improvement bag A may be omitted depending on the depth of the step or the groove 7 and the sectional shape.

According to the above configuration, when there is rainfall, the water-soluble film 5b is dissolved by raindrops, that is, since the nonwoven fabric is dispersed, the rough shape of the soil improvement bag A is held by the coarse net 5a, The surface 6 and the soil improvement bag A are well integrated to promote the neutralization reaction between calcium carbonate and acidic soil.

Moreover, among the granular calcium carbonate contained in the bag body 1, the one having a small particle size has a large surface area per unit weight and is quickly dissolved in rainwater or soil water, so that the soil improving effect by the neutralization reaction is obtained. , On the other hand, and those with a large particle size will gradually dissolve, so the soil improvement effect will be continuously exerted over a long period of time.

Moreover, since the water-soluble film 5b is dissolved, the bag 1 does not hinder the growth of roots of vegetation seeds.

In particular, in the above-mentioned embodiment, since the soil fertilizer 2 is mixed with the chemical fertilizer 3 and the water retention agent 4, the soil improvement bag A not only neutralizes and improves the acidic soil, but also improves vegetation. It becomes a base and is very effective for greening slope 6.

FIG. 4 shows another example of use of the soil improvement bag A described above.
This example of use is characterized in that the soil improvement bags A are laid on the slope 6 in a contour line at appropriate intervals, and then the tension grass body C is laid on the soil improvement bags A. Although not shown, it is desirable to cover the stretched grass C with a thin layer of soil. Here, the tension grass body C means that a vegetative seed such as lawn is carried through a water-soluble sizing agent on a mesh having a mesh that does not hinder germination or root growth or a non-woven fabric excellent in dispersibility as described above. Say something.

FIG. 5 shows another example of use of the soil improvement bag A described above,
A characteristic is that after the stretched grass body C is laid on the slope 6, the soil improvement bags A described above are laid on the slope 6 in a contour line shape at appropriate intervals. The soil improvement bag A has an anchor 9 and a peg on the slope 6.
It is fixed by typing 10.

6 and 7 show another example of use of the soil improvement bag A described above. As shown in FIG. 6, this example of use is a net 8
To have a double structure in which two nets (a front net and a back net) are overlapped with each other, or partially as a double structure to form accommodating portions D at appropriate intervals and The feature is that the soil improvement bag A described above is housed and the vegetation base material B is sprayed on it. Housing D
The soil improvement bag A may be inserted into the slope after the net 8 is stretched on the slope 6, or may be preceded by the stretch of the net 8.

FIG. 8 shows another example of use of the soil improvement bag A described above.
This example of use is characterized in that a net 8 with a housing portion D as shown in FIG. In this case, it is desirable that the soil improvement bag A be inserted into the storage portion D after the net 8 is stretched on the slope 6.

〔The invention's effect〕

Since the present invention has the above-mentioned configuration, the following effects can be obtained.

According to claims (1) and (2), when improving the acidic soil harmful to the growth of plants, even if the construction target is a slope, it is easy to lay a soil improvement bag in contour lines. Can be installed on.

In particular, as the soil improver to be stored in the bag, a mixture of granular calcium carbonate with different particle sizes is used, so the effect of soil improvement by the neutralization reaction is early and lasts for a long time. To be demonstrated.

According to claim (2), since the bag body is composed of a sheet-like member obtained by laminating a coarse net and a water-soluble film, the water-soluble film prevents calcium carbonate having a small particle diameter from spilling to the outside. Since the coarse net bears the strength of the bag body, it is easy to handle the soil improvement bag during transportation or laying.

Still, in the state where the soil improvement bag is laid on the slope, for example, when there is rainfall, the water-soluble film is dissolved by raindrops and the slope and the soil improvement bag are well integrated, and calcium carbonate and acidic soil Will promote a neutralization reaction,
Further, since the water-soluble film is dissolved, there is no fear that the germination of vegetation seeds and the growth of roots will be hindered.

According to claim (3), since the chemical fertilizer and the water retention agent are mixed in the soil improving agent in which granular calcium carbonate having different particle diameters are mixed, the soil improving bag neutralizes the acidic soil. Not only is it improved, but it also serves as a base for vegetation and is very effective for greening slopes.

[Brief description of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a perspective view of a soil improvement bag partially cut away and enlarged, and FIG. 2 is a perspective view of a sheet member constituting a bag body. 3 to 5 are schematic cross-sectional views illustrating an example of use of the soil improvement bag. FIG. 6 and FIG. 7 are a perspective view and a schematic sectional view for explaining an example of use of the soil improvement bag. FIG. 8 is a schematic sectional view illustrating an example of use of the soil improvement bag. A: soil improvement bag, 1 ... bag body, 2 ... soil improvement agent, 3
...... Chemical fertilizer, 4 …… Water retention agent, 5 …… Sheet member, 5a
…… Coarse net, 5b …… Water-soluble film.

Claims (3)

[Claims] 1. A soil improving bag comprising a water permeable bag containing a soil improving agent mixed with granular calcium carbonate having different particle sizes. 2. A bag body made of a sheet-shaped member obtained by laminating a coarse net and a water-soluble film,
A soil improvement bag containing a soil improvement agent in which granular calcium carbonate having different particle sizes are mixed. 3. The soil improvement bag according to claim 1, wherein the soil improvement agent is mixed with a chemical fertilizer and a water retention agent.