JP4989332B2 - Vegetation method to suppress turf growth and its composition mixture - Google Patents

Description

  The present invention relates to a turf vegetation method using a composition mixture for suppressing turf growth, and more specifically, a solidified layer mainly composed of mountain sand is formed in the soil, and black soil or turf-clad soil is formed on the solidified layer. A vegetation method that suppresses the growth of turf that can limit the root area of the turf by covering the turf and limit the root area of the turf, thereby reducing the number of mowing by reducing the number of turf cuttings, and a composition mixture thereof About.

In the conventional general vegetation vegetation operation, the soil is first excavated about 30 cm, and new soil and sand are put into the soil to improve the soil. After the lawn grows and grows, a series of operations such as mowing and weed control at regular intervals must be performed to maintain the vegetation.
Of this series of operations, the excavation operation is very deep, about 30 cm, and requires labor and energy. Moreover, in summer when the amount of solar radiation increases, the growth is fast, and the number of times of mowing must be increased, and the total number of times reaches about 24 to 36 times a year. In addition, plant harvesting materials such as cut grass and weeds are collected, transported, and discarded, which requires enormous labor and energy for plant management.
On the other hand, as a technique for mixing charcoal or the like into conventional concrete, a method of burning pulverized coal or a process of constructing any layer of concrete or mortar mixed with pulverized coal, and a culture soil layer on the concrete or mortar layer A lawn vegetation method has been proposed which comprises a step of providing a slab and a step of planting lawn on the culture soil layer (Patent Document 1).
JP 2004-248599 A

However, the method of Patent Document 1 provides an evergreen lawn that grows throughout the year, especially in the winter, and has the effect of restricting the growth of the above-ground part by limiting the growth of roots in deep layers in the soil. Because there is not, there are difficulties such as having to repeat mowing work many times throughout the year.
Therefore, in view of the above situation, the present invention has a solidified layer having a special porous structure that restricts the growth of the trunk of the turf and suppresses the growth of the ground part, and supplies a certain amount of moisture to the turf. It is intended to provide a turf vegetation method and a composition mixture that can maintain the growth to a moderate height, save labor and energy, and extremely reduce mowing work.

  In order to achieve the above object, the turf vegetation method according to claim 1 includes a step of excavating soil to a depth of 3 to 10 cm, and a mountain sand having a particle size of 2 to 7 mm by weight at the bottom of the excavation. A mixture of 75 to 85 wt%, Portland cement 10 to 15 wt%, some nonionic surfactant, 3 to 5 wt% charcoal having a particle size of 100 to 300 µm, and 3 to 5 wt% pearlite having a particle size of 100 to 300 µm A step of forming a solidified layer having a thickness of 1 to 6 cm having fine pores that are difficult to infiltrate into the trunk of the turf, and a composition mixture obtained by adding 20 to 30 wt% of water and stirring and kneading the mixture. From the step of laying black soil or turf-clad soil to a thickness of 2 to 4 cm on the solidified layer, the step of vegetating turf on the laid soil surface, and the step of spreading the topsoil on it. Constrain the turf root area and suppress the height above ground It is characterized by that.

  The composition mixture according to claim 2 comprises 75 to 85 wt% of sand with a particle size of 2 to 7 mm by weight ratio, 10 to 15 wt% of Portland cement, some nonionic surfactant, and charcoal with a particle size of 100 to 300 μm. 20-30 wt% of water is added to a mixture of 3-5 wt% and pearlite 3-5 wt% with a particle size of 100-300 μm, and the mixture is stirred and kneaded. It is characterized by suppressing.

In the present invention, since the solidified layer having a fine porous structure is formed at a predetermined depth, the trunk root having a large diameter of turf becomes difficult to enter the solidified layer, and as a result, the elongation of the trunk root is stopped. The growth of the grass in the part is suppressed. On the other hand, it is possible to infiltrate the thin roots into the solidified layer, and since the solidified layer has water permeability and water retention, the nutrients necessary for the growth of turf on the ground part through the infiltrated capillary roots and Moisture can be supplied. As a result, since the length of the turf ground portion can be set, there is no excessive turf growth, and the lawn mowing work can be extremely reduced. Further, the infiltration of the capillary roots into the solidified layer can root the solidified layer, and the turf does not uproot and flow out. Moreover, since the natural material is used for the solidified layer, the cost required for soil deterioration, waste reduction, and vegetation management after construction can be reduced.
Since charcoal is blended, water is absorbed when water is absorbed, and water is discharged and supplied when water is drought. Because it contains pearlite, it will allow excess water to pass through when absorbing water, preventing root rot.

An embodiment of the present invention will be described below with reference to the drawings and tables.
The composition mixture used for the turf vegetation method of the present invention forms a solidified layer with a fine porous structure, and has water retention and water permeability. In order to form the fine porous structure, the composition mixture uses mountain sand as a main raw material, Portland cement and a nonionic surfactant as additives, charcoal and pearlite as water retention and water permeability imparting materials. The mixture is mixed and kneaded with water.
Hereinafter, the characteristics of the material used in the present invention will be described, and the characteristics of the composition mixture produced from the raw materials and the characteristics of the vegetation method will be described.

Mountain sand is soil made mainly from weathered granite, etc., except for clays such as volcanic ash. As shown schematically in FIG. 1 in an enlarged manner, an example of the particle distribution of the solidified layer 1 formed from the composition mixture of the present invention, the 2a having a coarse particle size (5 to 7 mm) is about 30%, By uniformly dispersing about 50% of the particles 2b having a particle size (3 to 5 mm) and about 20% of the particles 2c having a small particle size (2 to 3 mm), the large and small mountain sands are in close contact with each other at random. Fine voids 3 are formed between the particles. The void 3 forms not only the surface layer of the solidified layer 1 but also a fine porous solidified layer 1 through which air and water can pass evenly in both the surface direction and the thickness direction of the solidified layer 1.
As shown in FIG. 2, the turf root is divided into a relatively thick trunk root and a finer capillary root. The size of the fine gap 3 is the penetration of the trunk root, which is the large diameter of the turf. However, the diameter of the turf is small enough to allow the infiltration of the capillary root.

As shown in FIG. 1, the Portland cement 4 substantially surrounds the surface of the mountain sand 2 blended as a main component, forms a number of voids 3, and maintains the cured state as the solidified layer 1. The Portland cement 4 retains an appropriate strength for use as the solidified layer 1 by curing, but can be easily crushed when discarded. Portland cement 4 can maintain a large bonding force between aggregates, but the cement itself is likely to be dumpling or lump-like and easily fills the gap 3. Therefore, the amount used is calculated from the specific surface area of the mountain sand 2 used. Can be decided.

The nonionic surfactant enhances the wettability of the mountain sand 2, the Portland cement 4 is uniformly dispersed on the surface of the mountain sand 2, and the surface tension of water is suppressed to form a uniform Portland cement 4 film. A gap 3 formed by joining the sands and sands 2 is formed to enable water retention and water permeability, and the hairy roots of the turf are easy to stretch and can be engulfed. As this nonionic surfactant, a nonylphenyl ether polymer having 6 to 7 carbon atoms, for example, a saturide manufactured by DEPCOPTY.LIMITED of Australia can be used.

Charcoal 5 is an eosinophilic plant that is baked at a low temperature such as 600 ° C. for 30 minutes in a short time, shows acidity in the presence of wood gas or wood vinegar in wood, and absorbs alkaline gas such as ammonia. Help the grass grow. Furthermore, since it is baked in a short time, the carbon bond is weak, the charcoal is soft, and has a porous structure with high water retention, air permeability, fertilizer and the like. The porous structure of charcoal eliminates root rot that occurs when the soil retains water, and can provide water to inhabit plants during drought.
The blended particle size of the charcoal 5 is preferably in the range of 100 to 300 μm, and if it is larger than 300 μm, it is difficult to mix and the strength is weakened after hardening, allowing penetration of the roots, and if it is less than 100 μm, it is too fine. is there.
The blending amount in the mountain sand soil is 3 to 5 wt%, and if it exceeds 5 wt%, the soil loses strength and becomes brittle, and if it is less than 3 wt%, the water retention effect is reduced.

The pearlite 6 is a closed-cell foam made by crushing obsidian into sand and firing at 1000 ° C., and is an inorganic ultralight gravel aggregate. This porous property is a material that does not completely saturate even when sufficiently absorbed, and always contains a considerable amount of air. Therefore, when pearlite is mixed with soil, it has a property of increasing water permeability rather than water retention, and root rot caused by soil retention can be eliminated.
The blended particle size of the pearlite 6 is preferably 100 to 300 μm, and if it is larger than 300 μm, it is difficult to mix, and the strength is weakened after curing, allowing penetration of the roots. Because it is lost.
The blending amount in the mountain sand soil is 3 to 5 wt%, and if it exceeds 5 wt%, the soil loses strength and becomes brittle, and if it is less than 3 wt%, the water permeability effect is reduced.
Moreover, since the pearlite 6 is an aggregate, it easily mixes with cement, and causes a chemical reaction to be integrated and solidified.

When the above materials are mixed according to a predetermined blending ratio to obtain a composition mixture, first, the soil to be vegetated is excavated to a depth of 3 to 10 cm in turf vegetation. The excavation method may be any of an excavator, a scoop, a mulberry, or the like. However, the excavation depth is about 1/4 compared with the conventional excavation depth of 30 cm, and the excavation depth is very thin.

Next, 20 to 30 wt% of water is added to the composition mixture and kneaded and embedded in the bottom of the excavation with a thickness of 1 to 6 cm. Using a trowel or the like, it is leveled and a solidified layer 1 is formed after a curing period of 7 to 10 days. The solidified layer can be formed by a chemical reaction between the Portland cement 4 mixed and dispersed, water, aggregates such as mountain sand 2 and pearlite 6 and other additives.

Then, black soil or turf-clad soil is laid on the solidified layer to a thickness of about 2 to 4 cm. Next, a turf sheet is vegetated on the laid soil surface, and a soil for preventing drying of the turf is spread thereon so that the turf is not hidden.

Next, the function of limiting the above-ground portion of the turf by controlling the growth of the turf root portion of the solidified layer formed by the above method will be described with reference to FIG.
FIG. 2 is a schematic diagram for controlling the growth of turf trunk root 7, turf capillary root 8, and turf above-ground part 9 with respect to solidified layer 1. The growth of turf in the present invention means that the underground root 7 extends in the black soil or turf until the solidified layer 1 formed of the composition mixture of the present invention is reached, and the Even after the trunk root 7 reaches the solidified layer 1, it further extends while passing through the gap 3 of the solidified layer 1, and in the above-ground part 9, it extends upward as the trunk root 7 extends downward.
More specifically, when the laid turf grows and about 3 to 6 months elapse, the large-diameter trunk root 7 eventually reaches the solidified layer 1 in the ground. At this time, the large-diameter trunk root 7 of the turf encounters a fine porous structure void 3 and is refused to enter the solidified layer 1, while the narrow capillary root 8 enters the void 3. Possible, the capillary root 8 is extended deeper into the solidified layer 1. That is, as shown in FIG. 1, since the solidified layer has a large number of fine voids 3 formed according to the diameter of the voids, the capillary root 8 that can be physically finely penetrated and the trunk root that is thick and difficult to penetrate. 7 will be distinguished. As a result, the trunk 7 loses its place and cannot grow any more, and at this point, the growth of the turf ground portion 9 also stops.
On the other hand, the turf capillaries 8 can enter the fine voids 3 of the solidified layer 1 to absorb nutrients and moisture. That is, the solidified layer 1 having a porous structure exhibits water permeability when water of a certain level or more is accumulated due to long rain or the like, and causes water to flow out. Allows the supply of moderate nutrients and moisture to the capillary root. At the same time, the capillary roots 8 are entangled in the fine voids 3 of the solidified layer, so that they are not easily pulled out, and even if the trunk roots 7 are shortened, there is no risk of turf uprooting due to wind and rain.
In this way, the above-ground portion 9 of the turf, which has continued to grow gently by the action of the capillary roots 8 and reduced the growth rate, can suppress the height thereof, so that the lawn mowing work can be reduced to the conventional 1 /. The frequency can be as low as about 4.
In addition, the solidified layer 1 can suppress the invasion of weeds from below and the growth of weeds mixed in the turf, so that turf management can be facilitated and the work frequency can be reduced in this sense. .

  In the above growth, the charcoal 5 which is a component of the solidified layer 1 can enhance water permeability and water retention, and can absorb the alkaline gas to help the growth of the grass, which is an acidophilic plant. Moreover, the pearlite 6 can raise water permeability, and can eliminate the root rot which generate | occur | produces when soil retains water.

  An example of the present invention was manufactured based on the above embodiment. The implementation status will be described below.

In producing the composition mixture based on the above-described form, the following blending was carried out.
80 wt% of sand with a particle size of 2 to 7 mm by weight, 15 wt% of Portland cement, saturide as a nonionic surfactant, 4 wt% of charcoal with a particle size of 100 to 300 µm, and 4 wt% of pearlite with a particle size of 300 µm 25 wt% of water was added to the mixture with and mixed with stirring to obtain a composition mixture. The mountain sand is mixed at a ratio of 30% for 2a with a coarse particle size of 5-7mm, 50% for 2b with a medium particle size of 3-5mm, and 20% for a small particle size of 2-3mm. What was done was used.
The soil for planting turf was excavated in advance to a depth of 6 cm, and the composition mixture was buried in a thickness of 3 cm at the bottom of the excavation and spread using a trowel or the like. Then, 3 cm thick black clay was spread on the solidified layer and leveled. A Korean turf was laid on the black soil, and the joints, which are the fine grains of red jade soil, were leveled so as not to hide the grass, and were observed. After one month, it was confirmed that the grass roots reached the solidified layer. After that, the stem root of the turf did not break through the solidified layer for about half a year, and the trunk root maintained a length of 3 cm, but the upper part of the turf gradually grew as the capillary root entered the solidified layer. However, since this growth is moderate, it was not necessary to cut grass as frequently as before, and the number of cuttings could be reduced to about 1/4. This proves that the solidified layer restricted the root area of the turf and suppressed top growth.
In addition, there was no growth of high-height weeds, and low-height weeds were better for turf growth and their growth was suppressed. Even if weeds that should grow fast were mixed, the growth was suppressed and the turf occupancy rate increased.

  INDUSTRIAL APPLICABILITY The present invention can be widely used for parks, road / river slopes, lawns laid on ordinary households, and the like.

It is a typical enlarged view which shows the particle distribution of the composition mixture in one Example of the solidification layer of this invention. It is a schematic sectional drawing which shows the growth control of the solidified layer which has the cross-sectional form of a fine porous structure, and turf.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solidified layer 2 Mountain sand 2a Coarse particle size of mountain sand 2b Medium particle size of mountain sand 2c Small particle size of mountain sand 3 Cavity 4 Portland cement 5 Charcoal 6 Pearlite 7 Grass root 8 Grass capillary root 9 Grass 10 aboveground parts of black soil or turfed soil

Claims (2)

Excavating the soil to a depth of 3-10 cm;
On the bottom of the excavation, 75 to 85 wt% of sand with a particle size of 2 to 7 mm by weight, 10 to 15 wt% of Portland cement, some nonionic surfactant, and 3 to 5 wt% of charcoal with a particle size of 100 to 300 μm And a mixture of pearlite having a particle size of 100 to 300 μm with 3 to 5 wt% of water and adding 20 to 30 wt% of water and stirring and kneading the mixture, the small diameter holes that are difficult to penetrate into the trunk of the turf Forming a solidified layer having a thickness of 1 to 6 cm;
Laying black soil or turf-clad soil to a thickness of 2 to 4 cm on the solidified layer;
Planting grass on the laid soil surface,
It consists of the process of spreading joints on top of it,
A turf vegetation method characterized by restricting the root area of the turf to suppress a predetermined height of the above-ground part. 75 to 85 wt% of sand with a particle size of 2 to 7 mm by weight, 10 to 15 wt% of Portland cement, some nonionic surfactant, 3 to 5 wt% of charcoal with a particle size of 100 to 300 μm, and a particle size of 100 A composition comprising 20 to 30 wt% of water added to a mixture of 3 to 5 wt% of pearlite with a thickness of ˜300 μm and stirring and kneading, and limiting the predetermined height of the above-ground part by limiting the root area of the turf. blend.