JP3333815B2 - Lawn growth promoting elastic body and lawn growth promoting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn growth promoting elastic body and a lawn growth promoting method.

[0002]

2. Description of the Related Art Nippon turf is used exclusively in sports stadiums such as golf courses and soccer fields, and in parks. However, in recent years, all-season green has been favored, and a large number of western turf has been actively used. In addition, cold grass-type grass species are frequently used in such turf. However, on such turf, there are a large number of players to play, and intense exercise is performed, so that the turf is severely damaged, and there is a problem of bare ground.

[0003] Conventionally, as a method of preventing such turf from becoming bare, a mat with perforations made of plastic or rubber has been installed on the turf. Such a mat can relieve pressure on the lawn by growing the lawn from the hole. Further, such a mat can prevent the grass from being worn out by the thickness of the mat.

[0004] However, in sports such as soccer, tennis, and the like, in which there are intense movements, sliding and the like are actively performed.
In turf used in such sports, the mat for preventing landscaping is not used because there is a risk of getting caught on the feet.

Recently, a volume of 0.0003 c developed by the present inventors was placed on a lawn or on soil previously sown with turf seeds.
Elastic body having a size of m ³ or more and 5 cm ³ or less (JP-A-7-2363)
No. 71) to prevent the grass from becoming bare ground. If such an elastic body is used for turf, it is possible to prevent solidification of the soil due to treading pressure and to prevent fraying of the turf. In particular, if you use an elastic material on the lawn of a golf course, soccer field, rugby field, schoolyard, park, etc., you can play any sport on the lawn with confidence, and even if your child plays, it will be caught on your feet There is no.

A similar method using an elastic body has been studied at Michigan State University in the United States [Topdressing Wi.
th Crumb Rubber from Used Tires on Athletic Fields
andOther High Traffic Turf Areas. (Dr. JN Rog
ers.III and JT VaniniDepartment of Crop and So
il Sciences Michigan State Univ.)].

[0007]

The elastic body sprayed on the turf has advantages such as being able to eliminate problems such as being caught on the foot and protecting the growing point of the turf. But the stadium,
Particularly on turf used for golf courses, soccer fields, etc., in order to promote the growth of the turf, the number of competitions is restricted, or an appropriate holiday is provided to grow the turf. Such turf has a limited period of use and cannot be fully utilized throughout the year.

It is an object of the present invention to provide a turf in which turf growth is promoted throughout the year.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a turf growth-promoting elastic body that is sprayed on soil where turf grows to promote turf growth. ~
The lawn growth promoting elastic body has a specific gravity of 4.0, and is selected from the group consisting of colors having a hue of 5PB to 5YR, a lightness of 3 to 7, and a saturation of 3 or more in the Munsell hue circle. It is colored by at least one kind of color.

The turf growth-promoting elastic body of the present invention can be used by many people if it is sprayed on the soil on which turf grows. It is possible to provide a lawn which is difficult to be turned into.

The inventor of the present invention has found that when a black elastic body is sprayed on a lawn, the growth of the turf is suppressed during the intense heat in summer compared to the elastic bodies of other colors. It was considered that the temperature and the like affected the lawn growth promoting action of the elastic body.

As a result of further studies, the present inventors have surprisingly found that an elastic body of a predetermined color significantly promotes turf growth.

The present inventor has determined that the elastic body is colored with at least one color selected from the group consisting of colors having a hue of 5PB to 5YR, a lightness of 3 to 7 and a saturation of 3 or more in the Munsell hue circle. If so, it was confirmed that the growth of grass was remarkably promoted, and the present invention was reached.

The Munsell hue circle is obtained by attaching a symbol and a number to each of the hue, lightness, and saturation of a color solid formed by three attributes. H. Invented by Munsell. Hue refers to the hue of apple red, lemon yellow or the like, lightness refers to the degree of brightness that can be compared regardless of hue, and chroma refers to the degree of vividness that is different from hue and lightness.

The hues of 5PB to 5YR in the Munsell hue circle include violet (5PB), blue (5B), blue-green (5BG), green (5G), yellow-green (5GY), yellow (5Y) and orange (5Y).
YR) and the like. Elastic bodies having a hue outside the range of 5PB to 5YR, such as white, magenta (5RP), and red (5
R), the elastic body of black or the like cannot obtain the effect of promoting the growth of turf throughout the year.

In the present invention, each color has a brightness of 3 to 7. At the same hue, the lower the lightness, the darker the color and the closer to black. Also, the higher the brightness,
The color becomes lighter and closer to white. Colors with a lightness of less than 3 are close to black, and colors with a lightness of more than 7 are close to white, and none of them have the effect of promoting turf growth throughout the year.

In the present invention, each color has a saturation of 3 or more. At the same hue, the lower the saturation, the duller the color and the closer to gray. Also, the higher the saturation, the more vivid the color. Colors with a saturation of less than 3 are close to gray and do not have the effect of promoting turf growth by color.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The color according to the present invention generally reflects light of at least a part of the wavelength within the wavelength range of 450 to 630 nm.
In colors such as blue, blue-green, green, yellow-green, yellow, and orange, respectively, mainly 450 nm, 490 nm, 520 nm,
Includes reflected light of wavelengths such as 570 nm and 630 nm.

The color of the elastic body for promoting turf growth of the present invention is preferably so-called green in order to promote turf growth throughout the year. An elastic body having a color close to white has a small effect of promoting the growth of turf throughout the year. The elastic body having a color close to black has a large effect of promoting the growth of turf only in a cold season. However, the elastic body having a color close to black slows down the growth of the turf in a hot season. If the elastic body of the present invention is green, the dispersed elastic body is less noticeable similar to turf, and a pseudo effect is aimed at, which is even more effective.

The lawn growth-promoting elastic body of the present invention comprises at least one color selected from the group consisting of colors having a hue of 5PB to 5YR, a lightness of 3 to 7, and a saturation of 3 or more in the Munsell hue circle. And may be substantially colored. In the present invention, if the surface of the elastic body is colored 100% with at least one of the colors according to the present invention, the growth of turf is remarkably promoted throughout the year. However, the color other than the color according to the present invention is actually colored by coloring the surface of the elastic body with the color according to the present invention as long as the elastic body is within the range that promotes the growth of turf throughout the year. However, it can be used without any problems.

The lawn growth promoting elastic body of the present invention is formed from a polymer material such as rubber or plastic. For example, the elastic body of the present invention can be formed from natural rubber, synthetic rubber or a mixture thereof, a plastic material or a mixture thereof, or a mixture of various rubbers and plastics.

The elastic body for promoting turf growth of the present invention only needs to be colored at least on the surface with the color according to the present invention. Therefore, not only can a colored lawn growth accelerating body be obtained by using a method commonly used in the rubber industry, but also by applying the color according to the present invention to the surface of the elastic body, the lawn length of the present invention can be obtained. An accelerating elastic body can be obtained.

In the present invention, various coloring agents such as pigments and dyes can be used for coloring the elastic body. Generally, in order for a substance to develop color, it must be in the visible region (4
(From 800 to 800 nm) must be selectively absorbed. The remaining color (complementary color) of the color of the absorbed light becomes a color and is visible to the naked eye. For example, a dye that selectively absorbs yellow light of 560 to 590 nm emits blue and 610 to 590 nm.
If red light of 730 nm is selectively absorbed, blue color is emitted. Therefore, as long as there is no problem such as a change with time, a coloring agent or the like which reacts with another substance to form a color can be used.

The treatment of waste tires has become a problem in terms of pollution. According to the research of the present inventor, the waste tire is colored,
A colored elastic body is also effective as the lawn growth promoting elastic body of the present invention.

The elastic body desirably has a hardness of 30 to 80 (JIS Shore A). This is because safety is required even when a person slides in.

Such an elastic body is mainly used for an outdoor lawn, but can also be used for a lawn such as an indoor stadium.

The elastic body of the present invention has a specific gravity of 1.1 to 4.0. This is because an elastic body having a specific gravity of less than 1.1 easily flows out when it rains. Further, the elastic body having a specific gravity exceeding 4.0 easily enters the soil. More preferably, the elastic body of the present invention has a specific gravity of 2.0 to 2.8 which is substantially equal to the specific gravity of sand.

It is preferable that the elastic body of the present invention hardly floats on water. For this purpose, a surfactant can be mixed with the elastic body. This is because it is effective to make the elastic body hard to float in water in order to prevent the elastic body from flowing out by water.

The volume of the elastic body is related to the degree of outflow,
Further, the volume of the elastic body is related to the playing quality. From this point, the elastic body of the present invention is 0.05 m
preferably it has a volume of m ³ 2 cm ^3.

Such an elastic body is formed on the soil where grass grows.
It is preferable to spray at a rate of 0.2 to 6.0 kg / m ² . When the amount of spraying is in the range of 0.2 to 6.0 kg / m ² , the elastic body exhibits a more excellent lawn growth promoting effect.

[0031]

EXAMPLES The present invention will be specifically described below with reference to examples. Example 1 Rubber chips were produced from the raw materials having the compounding ratios shown in Tables 1 and 2 by a method generally used in the rubber industry. First, the compounds shown in Tables 1 and 2 were kneaded with a rubber kneading machine, extruded into a 2.7 mmφ rod shape with an extruder, and cut into a length of about 30 mm at an angle of 15 °. FIG. 1 is a side view of the rubber chip according to the present embodiment. This rubber chip 1
In the figure, both ends of a rod-shaped body 1a are cut obliquely at an angle of 15 ° to form a slope 1b.

[0032]

[Table 1]

[0033]

[Table 2]

The colors of the rubber chips are shown in Tables 1 and 2.
It was adjusted using titanium oxide, pigments (blue, red and yellow, all manufactured by Sanyo Dyeing Co., Ltd.) and carbon. The color of the obtained chip is Munsell hue circle, and it is red purple (5RP), blue purple (5PB), blue green (5BG), green (5
G), yellow (5Y), orange (5YR) and red (5R)
Hue. Lightness / saturation is 5 for each hue
/ 6.

[0035] Perennial ryegrass was grown and adjusted to a cutting height of 20 mm in advance using a lawn mower. A section of turf having a size of 1 mx 3 m was prepared for each color chip. Rubber chips of each color were evenly applied to these sections at a rate of ² kg / m ² . FIG. 2 is a sectional view showing an example of the vegetation structure of the present invention. The turf 2 has a root 3 and a broom 4 and grows in soil 5. The rubber chip 1 is sprayed on the soil 5 where grass grows. As blanks, three sections of the same size without spraying rubber chips were examined.

On March 10, 1996, the first rubber tip was sprayed. The turf growth promoting effect was determined by measuring the turf height (mm) after growth. The first lawn height was measured on March 15 and March 25 of the same year, and the average value of three plots was calculated. Table 3 shows the results. In addition, once the rubber chips were all collected, the grass rubber height was adjusted to 20 mm in height at the same place on June 6, the same as in the first spraying, and the second rubber chips were sprayed. The grass height was measured on June 11 and June 21 in the same manner as the first time. Table 4 shows the results.

[0037]

[Table 3]

[0038]

[Table 4]

As shown in Tables 3 and 4, bluish purple, bluish green,
Green, yellow and orange colored rubber chips significantly promoted turf growth in both March and June. on the other hand,
The white, magenta and red colored rubber chips hardly promoted turf growth in both March and June.

FIGS. 3 to 6 show the respective color sections on June 2, 1996.
It is a drawing substitute photograph which shows turf height in one day. FIG.
It is a drawing substitute photograph which shows the lawn height in the lawn on which the chip is not sprayed. The grass in this picture grew to a height of about 32 mm. FIG. 4 is a photograph as a substitute for a drawing, showing a lawn height on a lawn on which white chips are scattered. This turf grew to a height of about 33 mm. FIG. 5 is a drawing substitute photograph showing the lawn height on the lawn on which green chips have been sprayed. This turf grew to a height of about 50 mm. FIG. 6 is a drawing-substituting photograph showing the lawn height on a lawn on which black chips are scattered. This turf grew to a height of about 30 mm.

As can be seen from FIGS. 3 to 6 and Tables 3 and 4, the black rubber chip had a remarkably high turf growth promoting effect in March, but suppressed the turf growth in June. .

Example 2 In the same manner as in Example 1, bermudagrass Tifton 419 was grown and adjusted to a cutting height of 20 mm using a lawn mower in advance.
A test lawn in each section was prepared, and rubber chips of each color of Example 1 were sprayed. The first rubber chip was sprayed on May 12, 1996. Turf height was measured on May 17 and May 27 of the same year. Table 5 shows the results. The second spraying of rubber chips was performed on August 7, the same year as in Example 1,
Turf height was measured on August 12 and August 22 of the same year. Table 6 shows the results. Similarly, as a third spraying, each rubber chip was sprayed on October 1 of the same year,
The grass height was also measured on October 6 and October 16. Table 7 shows the results.

[0043]

[Table 5]

[0044]

[Table 6]

[0045]

[Table 7]

As shown in Tables 5 to 7, bluish purple, bluish green,
Green, yellow and orange colored rubber chips significantly promoted turf growth in May, August and October. On the other hand, the white rubber chip hardly promoted the growth of turf in May, August and October.

The red-purple rubber chip was released in May and October.
The moon showed a relatively high turf growth-promoting effect, but in August little turf growth was promoted. The red rubber chips showed a relatively high turf growth promoting effect in October, but hardly promoted turf growth in May and August. In addition, the black rubber chips showed significantly higher turf growth promoting effects in May and October, but significantly suppressed turf growth in August.

Example 3 A used waste tire was pulverized with a refrigerant and sieved to a particle size of 2 to 5 mm (gap between screens) to obtain a rubber chip. This rubber chip was colored with acrylic urethane. As the color of the rubber chip, the same color of the Munsell hue circle as in Example 1 was employed. Using Bermudagrass Tifton 419,
As in Example 2, the effect of the color of the rubber chip on turf growth was tested. The application rate was 1.2 kg / m ² .

The first spraying was performed on May 14, 1996 in the same manner as in Example 1, and the measurement was performed on May 117 and May 27 of the same year. Table 8 shows the results. The second spraying was performed on August 7, the same year as in Example 1, and the grass height was measured on August 12 and August 22, the same year. Table 9 shows the results. In the same manner, as the third application,
Each rubber chip was sprayed on October 1 and 1 on October 6 of the same year.
The grass height was also measured on October 16th. Table 10 shows the results.
Shown in

[0050]

[Table 8]

[0051]

[Table 9]

[0052]

[Table 10]

As shown in Tables 8 to 10, bluish purple, bluish green,
Green, yellow and orange colored rubber chips significantly promoted turf growth in May, August and October. On the other hand, the rubber chips of white and red colors hardly promoted the growth of turf in May, August and October.

The red-purple rubber chips showed a relatively high turf growth promoting effect in May and October, but in August, compared with the rubber chips of the present invention, the turf growth promoting effect was exhibited. Was quite low. In addition, the black rubber chips showed a remarkably high turf growth promoting effect in May and October.
In August, it did little to promote turf growth.

Embodiment 4 Of the rubber chips of Embodiment 1, rubber chips of blue (5B) and yellow-green (5GY) are newly added without using white and black rubber chips, so that a total of seven kinds of rubber chips are used. Was manufactured in the same manner as in Example 1 except that the brightness and the saturation were changed. The yellow-green color was adjusted with blue and yellow pigments. As the combination of lightness / saturation, ten combinations shown in the left column of Table 11 were used among combinations indicated by nine levels of lightness of 1 to 9 and 14 levels of saturation of 1 to 14. The brightness and saturation are determined by the amount of titanium (white) and carbon (black)
It was adjusted by the amount of filler such as barium sulfate.

These hues, lightness and saturation are different from each other.
The effect of promoting the growth of turf was tested for various types of rubber chips. In the same manner as in Example 1, the lawn of perennial ryegrass was previously adjusted to a cutting height of 30 mm using a lawn mower, and rubber chips of each color were sprayed on May 8, 1997 one by one. Then, on May 14 of the same year, the grass height was reduced to 1 per block.
0 points were measured. The results are shown in Table 11 as average values. For comparison, the lawn height was similarly measured for blank lawns without spraying these rubber chips.

[0057]

[Table 11]

FIGS. 7 to 13 are substitute photographs for drawings showing the influence of lightness / saturation for each color. FIG. 7 shows blue purple (5PB)
3 is a photograph as a drawing substitute showing the effect of lightness / saturation of the image. 6/4
Rubber chips with the (brightness / saturation) combination significantly promoted turf growth. FIG. 8 is a photograph as a drawing showing the effect of the lightness / saturation of blue (5B). The 5/10 combination jumped and promoted turf growth. FIG. 9 is a photograph as a drawing showing the effect of the lightness / saturation of blue-green (5BG). 5/10
By 6/8, turf growth was significantly promoted. FIG.
Is a drawing-substitute photograph showing the effect of lightness / saturation of green (5G). Rubber chips ranging from 4/8 to 7/6 significantly promoted turf growth. In particular, 6/4 jumped and promoted growth.

FIG. 11 is a drawing-substituting photograph showing the effect of lightness / chroma of yellow-green (5 GY). A 6/4 combination of rubber chips jumped out and promoted turf growth. FIG. 12 is a photograph as a drawing showing the effect of lightness / saturation of yellow (5Y). The 5/10 combination significantly promoted turf growth. FIG. 13 is a drawing substitute photograph showing the effect of lightness / saturation of orange (5YR). Rubber chips from 3/6 to 6/4 and 8/2 rubber chips significantly promoted turf growth.

As can be seen from FIGS. 7 to 13 and Table 11,
The blue-violet, blue, and blue-green rubber chips remarkably promoted the growth of turf in any hue, lightness, and saturation as compared with the case where the chips were not sprayed (blank, growth of 32 mm). Green rubber chips are 2/1, 3/2, 8/2, 9 /
The combination of lightness / saturation of 1 had a small effect of promoting turf growth, but the other combinations promoted turf growth more than blanks. Even with yellow-green and yellow rubber chips, 2/1, 8/2,
The 9/1 lightness / saturation combination had a small effect on the turf growth, but the other combinations promoted the turf growth more than the blank. The orange rubber tip has a 2/1 brightness /
In the combination of saturation, the effect of promoting the growth of turf was weak, but in the other combinations, the growth of turf was promoted more than the blank.

[0061]

As described in detail above, the elastic body for promoting turf growth of the present invention promotes turf growth throughout the year. The use of the turf-growth-promoting elastic body of the present invention can significantly promote turf-growth particularly in a sports stadium such as soccer or the like in which movement is severe. In addition, the lawn growth-promoting elastic body of the present invention does not require investment of particularly large manufacturing equipment, and can be manufactured at a low cost.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a lawn growth promoting elastic body of the present invention.

Is a cross-sectional view showing an example of vegetation structure according to the present invention; FIG.

FIG. 3 is a photograph as a substitute for a drawing, showing a lawn height on a lawn on which chips are not sprayed.

FIG. 4 is a photograph as a substitute for a drawing showing a lawn height on a lawn on which white chips are scattered.

FIG. 5 is a drawing-substituting photograph showing a lawn height on a lawn on which green chips are sprayed.

FIG. 6 is a photograph as a substitute for a drawing showing a lawn height on a lawn on which black chips are scattered.

FIG. 7 is a drawing-substituting photograph showing the effect of lightness / chroma of blue-violet (5PB).

FIG. 8 is a photograph as a drawing showing the effect of lightness / saturation of blue (5B).

FIG. 9 is a drawing-substituting photograph showing the effect of lightness / chroma of blue-green (5BG).

FIG. 10 is a drawing substitute photograph showing the effect of lightness / saturation of green (5G).

FIG. 11 is a drawing substitute photograph showing the effect of lightness / chroma of yellowish green (5GY).

FIG. 12 is a drawing substitute photograph showing the effect of lightness / saturation of yellow (5Y).

FIG. 13 is a photograph as a drawing showing the effect of lightness / saturation of orange (5YR).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic body 1a Torso 1b Slope 2 Turf 3 Root 4 Rabbit stem 5 Soil

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-236371 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01G 13/00 A01G 1/00

Claims (2)

(57) [Claims] 1. A lawn-growth-promoting elastic body sprayed on soil where grass grows, wherein the lawn-growth-promoting elastic body has a specific gravity of 1.1 to 4.0, The lawn growth promoting elastic body is colored with at least one color selected from the group consisting of a color having a hue of 5PB to 5YR, a lightness of 3 to 7, and a saturation of 3 or more in the Munsell hue circle. An elastic body for promoting grass growth, characterized in that: 2. A method for promoting turf growth, which comprises spraying the elastic body for promoting turf growth according to claim 1 on soil in which turf grows.