JPH0641975A - Vegitation mat for raising seedling - Google Patents

Abstract

PURPOSE:To insure a vegitation base and contribute to environment greening by joining together a surface net having knots in which plants can be developed and a back net so as to form bag parts, receiving fertilizer lumps in some bag parts and vegitation materials for raising seedling in the remaining bag parts, and forming the surface net out of mixed spinning fiber. CONSTITUTION:A vegitation mat 1 is formed by joining together a surface net 2 and a back net 3, and a plurality of bag parts 4, 5 are alternately formed. Further, the surface net 2 is formed out of mixed spinning fiber composed of corrosive fiber and synthetic fiber. Next fertilizer lumps 6 are in the bag parts 4 and vegitation materials for raising seedling are received in the bag parts 5, and plant seeds 8 are mixed in the vegitation materials 7. Square knots are fixed on the surface net 2, and back net 3 is constituted into a Russel net so as to fix larger knots than that of the surface net 2. Hereby, necessary strength is held to insure a vegitation base in a early term from a half to one year after laying the mat on a slope face, and at germinating and developing, the major part of the net is decomposed and corroded so as to be homogenized to the soil, and hence the mat can contributes to environment greening.

Description

Detailed Description of the Invention

[0001] The present invention relates to a vegetation mat for raising seedlings, which is used, for example, to protect slopes and riverbeds and to make them green.

[0002]

2. Description of the Related Art Conventionally, as one means for protecting slopes and riverbeds and greening them, a grid-shaped slope frame has been installed along the slopes, and a vegetation mat carrying plant seeds and a stretch lawn body have been installed. There is a means for arranging the sandbags containing the soil in the sandbag bag with the above in the partition part of the grid-like method frame, but with such means, the vegetation mat and the sandbags are difficult to adapt to the uneven surface of the slope and the adhesion is good. However, since the soil contained in the sandbag reaches about 20 kg, it is very difficult to lift the soil to a high place, and the construction period is long.

[0003] As another greening means, a wire mesh lath is stretched on the slope and the like, and a vegetation material containing plant seeds is sprayed onto the wire mesh lath to protect and green the slope and the like. It is also known that such means requires a large-scale plant for spraying the vegetation material, and has a problem in that the vegetation material easily flows out by rainwater.

Therefore, the inventors of the present invention have previously disclosed in Japanese Unexamined Patent Publication No.
In Japanese Patent No. 1323, a vegetation mat for raising seedlings is proposed which is easy to construct without requiring large-scale equipment or difficult work, and which can favorably perform protective greening such as slopes in a short construction period.

The seedling-raising vegetation mat comprises a water-insoluble surface net having a mesh with which plants can grow and a water-insoluble back net having a mesh larger than that of the surface net. A plurality of bags are formed by joining them at intervals, and the fertilizer lumps are stored in the bags at predetermined intervals, and the remaining bags also contain seedling-growing vegetation material, and the seedling-growing vegetation. The plant seeds are carried on the existing part of the wood.

According to the seedling-raising vegetation mat described above, since the fertilizer lump and the seedling-raising vegetative material are protected by the front and back nets, they are housed in the bags provided on the respective nets.
It is excellent in terms of transportation and handling, and by arranging the seedling-growing vegetation mat on a slope or the like, and fixing each of the nets using an appropriate anchor, or, By accommodating the seedling-growing vegetation mat in the compartment of the slope frame installed on the slope, the construction on the slope of the seedling-growing vegetation mat is simplified, and the fertilizer mass and the seedling-growing vegetation material are Since it is housed in the bag portion of the net, there is no possibility of misalignment. Furthermore, since the mesh of the back net is made larger than the mesh of the front net, the fertilizer mass and the planting material for raising seedlings adhere well to the surface such as a slope through the large mesh, and as a result, Slopes and the like are preferably protected by the vegetation material for raising seedlings, and the seedling vegetation material, which has been prevented from being misaligned, germinates and grows plant seeds, thus protecting greening of slopes, etc. Done.

The front and back nets used in the above seedling-growing vegetation mats are made water-insoluble, and as a material thereof, plastic fibers such as nylon, polyethylene and polypropylene are usually used. The reason is as follows. , These water-insoluble plastic fibers are durable and inexpensive, and in order to carry out protective greening such as the slope, a plant is rooted on the slope, and until each plant grows to some extent This is because it is necessary to protect the slopes and secure a vegetation base for plants.

However, the plastic fibers such as nylon, polyethylene, and polypropylene used for the above-mentioned water-insoluble nets have the property that they do not deteriorate semipermanently under normal conditions. Unlike the above, even after many years, the nets are not exposed to weather and weathered or corroded to be homogenized in soil, and the nets are left semipermanently. Therefore, recently, the above-mentioned characteristics are rather a disaster and have become a global environmental problem as plastic pollution. That is, in the above situation, in order to perform the greening of the slope, using the seedling-growing vegetative mat mainly made of plastic fiber, on the one hand, contributes to environmental greening, but on the other hand There will be conflicts that lead to pollution problems.

Therefore, in order to solve the above problems, it has been attempted to use front and back nets made of vegetable fibers such as jute. Further, viscose rayon is a so-called corrosive fiber which is composed of regenerated cellulose and which completely corrodes even after a long time has passed, and since it can be applied to a loom relatively easily, viscose rayon It has also been attempted to use a net consisting of the above (for example, Japanese Utility Model Publication No. 63-828).

[0010]

However, as described above, when plant fibers such as jute, viscose rayon, or biodegradable plastics are used as the constituent material of the front and back nets used in the seedling vegetation mat, Caused the following problems. That is, the ideal net used for greening the slopes and the like retains sufficient tensile strength for about 6 months to 2 years after its laying,
It is desirable that after the plant has grown to a certain degree, it corrodes and becomes homogenized with the soil. However, most of the various nets mentioned above are corroded after about 2 months have passed since they were laid on the slope. Therefore, the vegetation base strength necessary for growing plants cannot be obtained, in other words,
The period of 2 months is too short for the plant to germinate and grow sufficiently, and the original purpose of securing the vegetation base of the plant is achieved by protecting the slopes with the net. I couldn't do it.

The present invention has been made in view of the above problems, and an object thereof is to maintain a sufficient tensile strength as a net for a period of about half a year to two years after laying and to improve plant seeds. To provide a vegetative mat for raising seedlings that can be cultivated in a plant and can contribute to environmental greening without degrading and corroding the net after the growth of this plant seed to homogenize with the soil and causing pollution problems. It is in.

[0012]

In order to achieve the above object, a first invention is a surface net having a mesh capable of growing plants and a back net having a mesh larger than the mesh of the surface net. And, to form a plurality of bag portions by joining at a predetermined spacing, while accommodating a fertilizer mass in the bag portion at a predetermined spacing, the remaining bag portion to house the vegetation material for raising seedlings, and, In the seedling-growing vegetation mat in which plant seeds are carried on the existing portion of the seedling-growing vegetation material, at least the surface net is formed by using a mixed fiber composed of a corrosive fiber and a synthetic fiber.

A second invention is to join a plurality of bags by joining a surface net having a mesh capable of growing plants and a back net having a mesh larger than the mesh of the surface net at predetermined intervals. Part is formed, and the fertilizer lumps are housed in the bag parts at predetermined intervals, and the remaining bag parts contain the seedling-growing vegetation material, and the plant seeds are carried on the existing part of the seedling-growing vegetation material. In the resulting seedling-growing vegetation mat, at least the surface net was formed using a mixed fiber rayon in which at least one of a high molecular emulsion and a water-soluble polymer was internally added to a viscose solution.

Further, in the first and second inventions, it is preferable that the back net is formed of mixed fiber, mixed fiber rayon or corrosive fiber.

[0015]

In the first invention, at least the front net among the front and back nets which are the main materials of the seedling vegetation mat,
Corrosive fibers such as animal and plant natural fibers or biodegradable chemical fibers, and formed by using a mixed fiber made of synthetic fibers such as vinylon and polyester, the corrosive fibers,
Although it is decomposed and corroded by microorganisms and disappears over time, the synthetic fibers can secure a predetermined tensile strength semipermanently without being decomposed by microorganisms, and thus the above corrosive fibers and synthetic fibers in a predetermined ratio. And, for example, corrosive fiber 60-
By knitting and weaving the net using a blended fiber in which 80% and 40 to 20% of synthetic fiber are mixed, the required strength is required for a period of about half a year to one year of planting until plants are planted on the slope. It is possible to maintain the vegetation and protect slopes and the like with the net to secure the vegetation base of plants, and to cultivate plant seeds satisfactorily.

The corrosive fiber, which is a constituent material of the mixed fiber for knitting and weaving the surface net, is decomposed and corroded by microorganisms in the soil when the plant seeds vegetated on the slope and the like are germinated and grown. Is homogenized, that is, the synthetic fibers constituting the mixed fiber are not decomposed and corroded, but the corrosive fibers are decomposed and corroded, so that the entire net remains semipermanently on the slope or the like. It can contribute to environmental greening without causing pollution problems.

In the second aspect of the present invention, at least the surface net among the front and back nets is added to a viscose solution composed of regenerated cellulose which is decomposed and corroded by microorganisms, a polymer emulsion such as vinyl acetate resin or a water solution such as polyvinyl alcohol. The mixed fiber rayon in which at least one of the hydrophilic polymers is internally added is used, and although the viscose rayon itself is decomposed and corroded by microorganisms and causes a decrease in strength over time, the high molecular emulsion or By internally adding a predetermined amount of the water-soluble polymer, for example, 2 to 15%, the tensile strength of the mixed fiber rayon is enhanced, and even when the mixed fiber rayon is about 1000 denier, the net can be reliably and satisfactorily knitted. Is possible,
Moreover, it is possible to secure a predetermined strength required for the net knitted and woven with the mixed fiber rayon. Further, although the viscose solution contains a large amount of hydroxyl groups, by internally adding the emulsion or polymer to the viscose solution, it is possible to reduce the amount of hydroxyl groups in the mixed fiber rayon as a whole. It is possible to reduce moisture absorption when the net is knitted with rayon and suppress decomposition and corrosion by microorganisms. Therefore, by knitting and weaving a net with the above-described mixed fiber rayon, it is possible to secure a tensile strength for a certain period necessary for securing a vegetation base of a plant on a slope or the like of the net.

Further, a mixed fiber rayon is used as a constituent material of the net, and the mixed fiber rayon is decomposed and corroded with time by microorganisms. Therefore, by knitting and weaving the net with the mixed fiber rayon, plant seeds germinate. By the time it grows up, it is decomposed and corroded by microorganisms and homogenized with soil. On the other hand, the polymer or emulsion that is difficult to be corroded by the microorganisms internally added to the viscose solution is decomposed due to the corrosion of the mixed fiber rayon, so that the net may remain semipermanently on the slope or the like. It can contribute to environmental greening without causing pollution problems.

In the above-mentioned first and second inventions, when the back net is formed of a mixed fiber, a mixed rayon or a corrosive fiber, the back net is partially or entirely decomposed and corroded like the front net. Since they can be homogenized in the soil, the whole of each of these nets can semi-permanently remain on the slope or the like and cause no pollution problem, and can contribute to environmental greening more favorably.

[0020]

EXAMPLE An example of a vegetation mat for raising seedlings according to the present invention will be described below with reference to the drawings. The seedling-growing vegetation mat 1 shown in FIG. 1 has a front net 2 and a back net 3 which are opposed to each other and are joined to each other at predetermined intervals so that a plurality of large and small bag portions 4 and 5 having different sizes are alternately arranged. Formed into
A fertilizer lump 6 is stored in the small bag portion 4, a seedling-growing vegetation material 7 is stored in the large bag portion 5, and plant seeds 8 are mixed in the seedling-growing vegetation material 7.

The surface net 2 has a square mesh capable of growing a plant, and the vegetation material 7 for raising seedlings.
It is preferable that one side of the square mesh is in the range of 2 to 30 mm from the viewpoint of preventing outflow of the vegetation material.

On the other hand, the back net 3 has a so-called Russell net structure which is produced by swinging the weft yarn to the left and right and inserting it into the warp yarn. As shown by the phantom line a in FIG. In the back net 3 used in the present invention, the weft yarn c is swung to the left and right and inserted into the warp yarn b at a pitch of about the mesh size between the warp yarns b. The swing pitch is partially skipped (one pitch is skipped in the embodiment) to disperse the large rectangular mesh d, and the rectangular mesh d is the mesh of the surface net 2. The shorter side is set within the range of 2 to 50 mm and the longer side is set within the range of 2 to 100 mm.

The fertilizer mass 6 is, for example, Japanese Patent Publication No. 1-345.
As seen in Japanese Patent Publication No. 70, a slow-acting or slow-acting fertilizer (for example, solid fertilizer or ivy nitrogen fertilizer is selected as the slow-acting fertilizer, and coating fertilizer is selected as the slow-acting fertilizer) 9, Mix with an inorganic water retaining material (eg vermiculite or perlite) or an organic water retaining material (eg bark compost or peat moss), and mix this mixture with a thickness of 0.1-0.6 mm and an air flow rate of 10-300 cc / cm.
A functionally slow-acting one that can be put into a bag 10 made of a non-woven fabric of ² / sec so as to maintain the fertilizing effect for a long period of time is preferably used.

The seedling-raising vegetation material 7 is, for example, an organic material such as bark compost or peat moss, an inorganic material such as vermiculite or perlite, and a vegetation material 11 mixed with other soil improving agents or general chemical fertilizers. It is formed by wrapping it with 12 and holding it in a plate shape, and the plant material 8 is mixed with the vegetation material 11.

The seedling-raising vegetation mat 1 formed as described above mainly comprises a seedling-raising vegetation material 7 mixed with plant seeds 8 and a fertilizer mass 6, and is relatively lightweight as a whole, In addition, each of the nets 2 and 3 in a state where the seedling-raising vegetation material 7 and the fertilizer mass 6 are protected by the front and back nets 2 and 3.
Since the seedling-raising vegetation mat 1 is housed in the bag portions 4 and 5 according to the above, the transportation and handling of the seedling-raising vegetation mat 1 are easy.

Then, as shown in FIG. 3, the seedling-growing vegetation mat 1 is arranged on the slope 13 with the surface net 2 facing upward, and an appropriate anchor 14 or the like is used. Then, by fixing each of the nets 2 and 3 to the slope 13, or by placing the seedling-growing vegetation mat 1 in the partition of the grid-shaped slope frame arranged on the slope, the seedling-growing vegetation is grown. The mat 1 can be easily installed on the slope 13, and since the fertilizer mass 6 and the seedling-raising vegetation material 7 are housed in the bags 4 and 5 of the nets 2 and 3, they are misaligned. Moreover, since a large rectangular mesh d is formed on the back net 3 through the large rectangular mesh d, the fertilizer mass 6 and the seedling-growing vegetation material 7 are applied to the slope 13. It becomes easy to adhere.

As described above, after the seedling-growing vegetation mat 1 is installed on the slope 13, the bag 12 enclosing the vegetation material 11 absorbs water and dissolves by waiting for rain or supplying water. As the restraint by the bag 12 is released, the vegetation material 11 is evenly placed as if it was sprinkled on the slope 13, and the fertilizer 9 exudes from the fertilizer mass 6 and the fertilizer having the fertilizer 9 is present. The above-mentioned plant seeds 8 are made from various vegetation materials 11 as nursery beds.
As a result of germination and growth, the slope 13 is protected and greened.

The vegetation material 7 for raising seedlings is the above-mentioned vegetation material.
11 is wrapped in a bag 12 to form a rod, or organic material such as bark compost or peat moss is compressed and pressed into a plate or rod shape. Alternatively, the peat rod may be covered with a water-soluble sheet-shaped member.

When the seedling-growing vegetation material 7 is formed in a rod shape as described above, as shown in FIG. 4, a plurality of the rod-shaped seedling-raising vegetation materials 7 are housed in the large bag portion 5 to grow the seedling-growing vegetation. The mat 1 is constructed. It is also possible to form the fertilizer lump 6 into a rod shape and store one or more of the fertilizer lump 6 in the pouch portion 4 to form the seedling-growing vegetation mat 1. Further, as shown in FIG. 5, the fertilizer mass 6 and the seedling-raising vegetation material 7 are formed into a rod shape having substantially the same size, and the size of the bag portions 4 and 5 formed by the nets 2 and 3 is also changed. A rod-shaped fertilizer lump formed in at least one bag portion 4 which is formed into a plurality of consecutively-sized ones suitable for accommodating the rod-shaped fertilizer lump 6 and the seedling-raising vegetation material 7. 6, the rod-shaped seedling-raising vegetation material 7 may be stored in the plurality of continuous bag portions 5.

A typical modified example of the seedling-raising vegetation material 7 will be described with reference to FIG. 6, which shows that a superabsorbent polymer and an organic material are kneaded with a paste material.
A shape-retaining member 15 having vertical and horizontal recesses e formed therein to be dispersed by water absorption is formed, and each of the recesses e of the shape-retaining member 15 accommodates, for example, the above-mentioned vegetation material 11, and the recesses e are formed into a water-soluble sheet shape. The seedling-raising vegetative mat 1 is constructed by closing the sheet-shaped member 16 in the bag portion 5 with the member 16 closed toward the back net 3 side. According to the above configuration, the shape-retaining member 15 can effectively prevent the seedling-raising vegetation material 7 from losing its shape, which is excellent in terms of transportation and handling. Since 15 is dispersed by water absorption, it becomes a vegetation material.

In the above embodiments, plant seeds 8 are mixed in the seedling-growing vegetation material 7. However, at least one of the front net 2 and the back net 3 or at least above and below the seedling-growing vegetation material 7. It is possible to carry out the plant seeds 8 on one surface by means such as adhesion, or to carry the plant seeds 8 on a water-soluble sheet-shaped member capable of growing plants, It is also possible to hold it on at least one of the front net 2 and the back net 3.

In the first aspect of the invention, however, the front and back nets 2, 3 constituting the seedling raising vegetation mat 1 as described above.
Among them, at least the surface net 2 is knitted and woven using a mixed fiber made of a corrosive fiber and a synthetic fiber.

As the corrosive fiber of the mixed fiber for knitting and weaving the surface net 2, natural fibers such as cotton, silk and hemp that are decomposed and corroded by microorganisms and disappear over time, and biodegradable chemicals such as viscose rayon. Fibers and the like are used, and as the synthetic fiber, for example, vinylon series such as polyvinyl alcohol, polyester series such as polyester, nylon, etc. which can ensure a predetermined tensile strength semipermanently without being decomposed by microorganisms Polyamide and polyacrylonitrile such as acrylic are used. The mixed fiber is preferably a mixture of corrosive fiber 60 to 80% and synthetic fiber 40 to 20%.

The warp yarns and the weft yarns of the surface net 2 constituting the seedling-growing vegetation mat 1 are formed by the mixed spun fiber composed of the above corrosive fibers and synthetic fibers, and the surface is formed by the mixed spun fiber. By knitting the net 2, the net 2 retains the necessary strength for a period of about half a year to one year after laying on the slope 13, and the net 2 protects the slope 13. Thus, the vegetation base of the plant can be secured, and the plant seeds 8 contained in the seedling-raising vegetation material 7 and the like can be favorably grown. Further, the corrosive fiber is decomposed and corroded over time by microorganisms, and is homogenized with the soil when the plant seed 8 germinates and grows, that is, although the synthetic fiber is not decomposed and corroded, Since the corrosive fibers are decomposed and corroded, the entire mesh 1 does not remain on the slope 13 semipermanently and does not cause a pollution problem, thereby contributing to environmental greening.

Next, viscose rayon is used as the corrosive fiber, polyester is used as the synthetic fiber, and the blended fiber of the present invention in which both of them are blended in a ratio of 70:30, and a comparative example thereof are shown. When a test was conducted on the tensile strength when viscose rayon was used alone, the results shown in Table 1 below were obtained. The tensile test for both was started in July, when the movement of microorganisms was active and the deterioration of strength due to the decomposition and corrosion of the microorganisms was most likely to occur. Further, the tensile tests of both of the above-mentioned ones used a size of 2000 denier.

[0036]

[Table 1]

As is clear from Table 1 above, the viscose rayon used as a comparative example had a tensile strength of 0 after about 2 months, whereas the blended fiber according to the present invention was used from the time of laying. Although the strength gradually decreases due to decomposition and corrosion by microorganisms, the tensile strength after one and a half years has passed is 1.2 kg.
Therefore, it can be understood that the net 2 can protect the slope 13 and secure the vegetation base of the plant by knitting and weaving the net 2 with the above-described mixed fiber. The tensile strength per wire constituting the net 2 is 0.5 kg.
With the above, when laid on the slope 13, it is possible to prevent freezing and collapse of the slope 13. Therefore, when the tensile strength is 1.2 kg as described above, the slope 13 can be sufficiently protected.

In the second invention, of the front and back nets 2 and 3 constituting the seedling-raising vegetation mat 1 as described above, at least the warp yarns and the weft yarns of the front net 2 are made of a polymer emulsion or a water-soluble polymer. A mixed fiber rayon in which at least one of them is internally added to a viscose solution is used, and the net 2 is knitted with the mixed fiber rayon.

The mixed fiber rayon for knitting and weaving the net 2 is a viscose solution composed of regenerated cellulose that is decomposed and corroded by microorganisms, such as vinyl acetate resin, which is not decomposed and corroded by microorganisms that compensate for the decrease in strength due to the decomposition and corrosion.
A polymer emulsion such as an acrylic resin or ethylene vinyl acetate resin and a water-soluble polymer such as polyvinyl alcohol or polyacrylic amide are internally added, or both the emulsion and the polymer are internally added. Is used.

The mixed fiber rayon contains 2-1 to a high-molecular emulsion or water-soluble polymer in a viscose solution.
It is preferable to internally add it at a rate of 5%.

The mixed fiber rayon is prepared by adding the polymer emulsion or water-soluble polymer to a viscose solution which is a raw material of viscose rayon to prepare a mixed solution, and spinning the mixed solution from a flat special spinneret. Then, it is formed into a tape shape called a so-called ribbon straw.

When the mixed fiber rayon prepared as described above is used as the warp yarn and the weft yarn of the surface net 2, the mixed fiber rayon is decomposed and corroded by microorganisms and causes a decrease in strength over time. Since the high molecular emulsion and the water-soluble polymer are internally added, the tensile strength as the mixed fiber rayon is enhanced, and even when the mixed fiber rayon is about 1000 denier, the warp yarn and the weft yarn of the net 2 are As a result, the net 2 can be reliably and satisfactorily knitted and weaved.
Moreover, it is possible to secure a predetermined strength required for the surface net 2 knitted and woven with the mixed fiber rayon.

Although the viscose solution originally contains a large amount of hydroxyl groups, the amount of hydroxyl groups in the whole mixed fiber rayon can be reduced by internally adding the emulsion or polymer to the viscose solution. You can
Water absorption when the net 2 is knitted with this mixed fiber rayon can be reduced, and decomposition and corrosion by microorganisms can be suppressed. Therefore, by knitting the net 2 with the above-described mixed fiber rayon, it is possible to secure the tensile strength for a certain period necessary to secure the vegetation base of the plant on the slope 13 in the net 2, and the vegetation material Plant seeds 8 included in 7 etc.
Can be well cultivated.

Further, a viscose solution is used as a constituent material of the mixed fiber rayon, and this viscose solution is decomposed and corroded with time by microorganisms. Therefore, by knitting the net 2 with the mixed fiber rayon, When the plant seeds 8 germinate and grow, they are decomposed and corroded by microorganisms and homogenized with soil. On the other hand, since the polymer or emulsion which is hardly corroded by the microorganisms internally added to the viscose solution is decomposed due to the corrosion of the viscose rayon, the net 2 remains semipermanently on the slope 13. As a result, it can contribute to environmental greening without causing pollution problems.

Next, regarding the mixed fiber rayon according to the present invention in which 5% of a vinyl acetate resin emulsion is internally added as a polymer emulsion to a viscose solution, and as a comparative example, the tensile strength when viscose rayon is used alone When the test was conducted, the results shown in Table 2 below were obtained.
The tensile test for both was started in July, as in the above-mentioned case, in which the movement of microorganisms was active and the decrease in strength was most likely to occur due to the decomposition and corrosion of the microorganisms. Further, the tensile tests of both of them used the size of 1000 denier.

[0046]

[Table 2]

As is clear from Table 2 above, the viscose rayon used as a comparative example had a tensile strength of 0 after about 2 months, whereas the mixed fiber rayon according to the present invention was laid. Although the strength gradually decreases due to decomposition and corrosion by microorganisms, the tensile strength after one year is 0.6K
Therefore, it can be understood that the net 2 can protect the slope 13 and secure the vegetation base of plants by knitting and weaving the net 2 with the above-mentioned mixed fiber rayon.

On the other hand, it is preferable that the back net 3 constituting the seedling-growing vegetation mat 1 is formed by using mixed fiber or mixed fiber rayon as in the case of the first and second inventions. In this case, like the front surface net 2, the rear surface net 3 can be partially or entirely decomposed and corroded so as to be homogenized in the soil. Therefore, the whole of the nets 2 and 3 can be the slope 13 or the like. It is possible to contribute to environmental greening more satisfactorily without being left semi-permanently and causing pollution problems.

The back net 3 may be made of the corrosive fiber which is the material of the mixed fiber according to the first invention, that is, the above-mentioned natural fiber or biodegradable chemical fiber such as viscose rayon. In this case, since the back net 3 can be decomposed and corroded to be homogenized in the soil, it is possible to further contribute to environmental greening.

By the way, as shown in the above embodiment, when the fertilizer mass 6 and the seedling-growing vegetation material 7 are loaded into the bag portions 4 and 5 of the seedling-growing vegetation mat 1, the bags 10 and 1 are respectively filled.
In the case of using 2, the bags 10 and 12 are preferably formed by using a corrosive material such as a staple fabric, a pulp-based nonwoven fabric, soluble paper or a biodegradable plastic film. When forming 12, 12, not only the front and back nets 2, 3 but also the bags 10, 1
2 can also be corroded over time and homogenized in soil, thus eliminating pollution problems.

[0051]

As described above, the vegetative mat for raising seedlings according to the first aspect of the present invention has at least the surface net among the front and back nets formed by using the mixed fiber made of corrosive fiber and synthetic fiber. Laying on the surface, etc. For a period of about half a year to one year, the necessary strength is maintained, the slope can be protected by the net to secure the vegetation base of the plant, and the plant seeds can be well grown. . Also, when the plant seeds germinate and grow, most of the net can be decomposed and corroded to homogenize in the soil, so that the entire net remains semipermanently on the slope or the like. Therefore, it can contribute to environmental greening without causing pollution problems.

The seedling vegetation mat of the second invention uses a mixed fiber rayon in which at least one of the front and back nets is internally added to at least one of a high molecular emulsion and a water-soluble polymer in a viscose solution. In the same manner as in the first aspect of the invention, the surface net retains the necessary strength for a predetermined period until the plant seed germinates and grows, and the net can secure the vegetation base of the plant. The seeds can be grown well. Moreover, after the growth of plants, the net can be decomposed and corroded, and therefore, the net does not remain semipermanently on the slope or the like and does not cause pollution problems, and contributes to environmental greening. can do.

Further, in the above-mentioned first and second inventions, when the back net is formed of a mixed fiber, a mixed fiber rayon or a corrosive fiber, the back net is partially or entirely decomposed like the front net. Since it can be corroded and homogenized in the soil, the whole of each of these nets can semi-permanently remain on the slope or the like and cause no pollution problem, and can contribute to environmental greening more favorably.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing an example of a vegetation mat for raising seedlings according to the present invention.

FIG. 2 is an explanatory view showing an exaggerated back net which constitutes the vegetative mat for raising seedlings.

FIG. 3 is a side sectional view showing an example of construction on the slope of the vegetation mat for raising seedlings.

FIG. 4 is a side sectional view showing another embodiment.

FIG. 5 is a side sectional view showing another embodiment of the present invention.

FIG. 6 is a side sectional view showing another embodiment of the same.

[Explanation of symbols]

2 ... Front net, 2 ... Back net, 4,5 ... Bag part, 6 ... Fertilizer mass, 7 ... Vegetation material for raising seedlings, 8 ... Plant seeds.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Researcher Izuka Ikazu 1 590 Takao, Tsuyama City, Okayama Prefecture Nippon Vegetation Co., Ltd.

Claims (3)

[Claims] 1. A surface net having a mesh capable of growing plants and a back net having a mesh larger than that of the surface net are joined at predetermined intervals to form a plurality of bags. , The fertilizer lumps are accommodated in the bag portions at predetermined intervals, and the remaining bag portions accommodate vegetation material for raising seedlings,
And, in a seedling-raising vegetation mat in which plant seeds are carried on the existing portion of the seedling-raising vegetation material, at least the surface net is formed by using a mixed fiber made of a corrosive fiber and a synthetic fiber. Vegetation mat for raising seedlings. 2. A surface net having a mesh capable of growing plants and a back net having a mesh larger than the mesh of the surface net are joined at predetermined intervals to form a plurality of bags. , The fertilizer lumps are accommodated in the bag portions at predetermined intervals, and the remaining bag portions accommodate vegetation material for raising seedlings,
Further, in a seedling vegetation mat in which plant seeds are carried on the existing portion of the seedling vegetation material, at least the surface net is formed by internally adding at least one of a polymer emulsion and a water-soluble polymer to a viscose solution. A vegetation mat for raising seedlings, which is formed by using mixed fiber rayon. 3. The seedling-growing vegetation mat according to claim 1, wherein the back net is formed of a mixed fiber, a mixed fiber rayon or a corrosive fiber.