JP7079690B2 - Maintenance method of natural turf for stadium - Google Patents

Description

The present invention relates to a method for maintaining and managing natural turf for a stadium.

For example, in a game such as baseball, soccer, rugby, or tennis, natural turf is vegetated on the ground (pitch) that serves as a stadium (see, for example, Patent Documents 1 to 5). In addition, artificial turf was installed because it is easy to use in competitions even in rainy weather, and it is difficult to take in sunlight into natural turf in all-weather stadiums with fixed roofs. The ground is also adopted. On the other hand, the ground on which the artificial turf is installed is generally preferred because the artificial characteristics of the ground increase the burden on the athlete's legs and the appearance of the turf surface is more natural. For competition, it is considered preferable to use a ground with natural grass vegetation.

In general, natural turf includes, for example, warm-season turf grass (summer turf) such as Korai turf and cold-season turf grass (winter turf) such as bentgrass. When selecting natural turf for a stadium, the turf type is selected in consideration of the location of the stadium, the growing environment such as soil, and the type of competition.

In addition, proper growth of natural turf generally requires a balance of six elements: temperature, light, water, nutrients (fertilizer), air, and soil, and these six elements should be given in a well-balanced and appropriate condition. Therefore, it is possible to grow good natural turf. On the other hand, if any one of these six elements is missing, good natural turf may not be obtained. Further, even if the balance of the above six elements is lost, the natural turf grows, but it is difficult to obtain a good natural turf.

Japanese Unexamined Patent Publication No. 2001-016973 Japanese Unexamined Patent Publication No. 2001-0785773 Japanese Unexamined Patent Publication No. 5-23043 Japanese Unexamined Patent Publication No. 10-48054 Japanese Unexamined Patent Publication No. 10-39

By the way, in various competitions such as those mentioned above, especially professional competitions, games are not played all year round. For example, there is an off-season period of about several months, and during this period, the stadium ( Ground) may not be used. On the other hand, regardless of whether the stadium is used or not, the ground where natural grass is planted needs to be maintained throughout the year. For this reason, even during the off-season when the stadium is not in use, maintenance of natural turf must be carried out in the same way as during the season, and it is necessary to assign workers, as well as personnel expenses and various maintenance. There was a problem that expenses and the like increased.

The present invention has been made in view of the above problems, and the maintenance of natural turf for stadiums can be simplified, labor saving and cost reduction can be achieved while the stadium is not used. The purpose is to provide a method.

As a result of diligent studies by the present inventors in order to solve the above-mentioned problems, by appropriately adjusting each element which is a necessary condition for growing natural turf during the period when the stadium is not used such as in the off-season. We have found that maintenance can be simplified by forcibly stopping the growth of natural turf and putting it to sleep temporarily, and by putting it to sleep in a recoverable state, and completed the present invention.

That is, the first invention in the present invention is a method for maintaining and managing natural turf for stadiums, which maintains and manages natural turf of cold region type turf vegetated in the soil of the stadium, and grows the natural turf. The growing period and the dormant period for temporarily stopping the growing of the natural turf are alternately provided, and during the dormant period, the atmospheric temperature at least in the vicinity of the natural turf is set to more than 0 (° C) and less than 10 (° C). Moreover, the daily cumulative amount of light for the natural turf is in the range of 0 to 40 (mol, m-2, day-1).

According to the maintenance method of the natural turf for the stadium having the above configuration, the atmospheric temperature in the vicinity of the natural turf and the daily integrated light intensity (DLI) of the light during the dormant period are determined with respect to the natural turf of the cold region type turf. By setting the condition within the range, the growth (growth) of natural turf can be almost stopped. That is, since the plant height of the dormant natural lawn does not grow, maintenance such as mowing is not required.
On the other hand, by setting the dormant condition of the natural turf within the above range, it is possible to surely recover (start the growing) the natural turf from the dormant state by appropriately setting the condition in the subsequent growing period.

Next, in the second aspect of the present invention, in the maintenance method of the natural turf for a stadium having the above configuration, the dormancy period further determines the amount of fertilizer applied to the soil {no fertilizer application to the growing period. It is characterized in that it is in the range of the same amount as.

According to the maintenance method of natural turf for stadiums having the above configuration, the amount of fertilizer applied to the soil during the dormant period is in the range from no fertilizer to the same range as the growing period, that is, from zero to the amount required for normal growing. By doing so, the growth of natural turf can be stopped more effectively. In addition, by setting appropriate conditions during the subsequent growing period, it becomes possible to more reliably recover the natural turf from the dormant state.

Next, according to the third aspect of the present invention, in the maintenance method of the natural turf for the stadium having the above configuration, the dormant period further increases the atmosphere in the vicinity of the natural turf, the general atmosphere or CO ₂ . It is characterized by having a conditioned atmosphere.

According to the maintenance method of the natural turf for the stadium having the above configuration, the growth of the natural turf can be more effectively stopped by setting the atmosphere in the vicinity of the natural turf during the dormant period to the above atmosphere. In addition, by setting appropriate conditions during the subsequent growing period, it becomes possible to more reliably recover the natural turf from the dormant state.

Next, in the fourth aspect of the present invention, in the maintenance method of the natural turf for a stadium having the above configuration, the soil is irrigated only when the surface of the soil is dry during the dormancy period. It is characterized by that.

According to the maintenance method of the natural turf for stadiums having the above configuration, it is possible to prevent root rot from occurring in the natural turf by limiting the irrigation of the soil during the dormant period only when the surface of the soil is dry. Therefore, it is possible to obtain good natural turf.

Next, the fifth aspect of the present invention is characterized in that the soil is sandy soil in the maintenance method of the natural turf for a stadium having the above configuration.

According to the maintenance method of natural turf for stadiums having the above configuration, since the soil is sandy soil, drainage is good, so that root rot can be prevented and good natural turf can be produced as described above. It will be possible to obtain.

Next, a sixth aspect of the present invention is the method for maintaining and managing the natural turf for a stadium having the above configuration, and further, after the dormancy period ends, the atmospheric temperature in the vicinity of the natural turf is set in the growing period. It is characterized in that the natural turf is grown in the range of 15 to 20 (° C.).

According to the maintenance method of the natural turf for the stadium having the above configuration, after the dormant period, by setting the atmospheric temperature near the natural turf in the above range during the growing period, the temperature rise becomes a switch and the dormant state is started. Recovery speed is significantly increased.

According to the maintenance method of the natural turf for stadium according to the present invention, the ambient temperature in the vicinity of the natural turf during the dormant period is set to more than 0 (° C) and less than 10 (° C) with respect to the natural turf of the cold region type turf. Moreover, by setting the daily cumulative amount of light for the natural turf in the range of 0 to 40 (mol, m-2, day-1), the growth (growth) of the natural turf can be almost stopped. can. That is, since the plant height of the dormant natural lawn does not grow, maintenance such as mowing is not required.
Further, by setting the dormant condition of the natural turf within the above range, the natural turf can be surely recovered from the dormant state by appropriately setting the condition in the subsequent growing period.
Therefore, the maintenance of natural turf can be simplified during the period when the stadium is not used, and labor saving and cost reduction can be achieved.

It is a figure explaining the demonstration experiment of the operation by the maintenance method of the natural turf for a stadium which concerns on this invention, and the curing days and the amount of chlorophyll in the turf grass when the natural turf of a cold region type turf was cured under various conditions. It is a graph which shows the relationship of. It is a figure explaining the demonstration experiment of the action by the maintenance method of the natural turf for a stadium which concerns on this invention, and the curing days and the amount of sucrose in a turf grass when the natural turf of a cold region type turf is cured under various conditions. It is a graph which shows the relationship with.

Hereinafter, an example of a maintenance method for a natural turf for a stadium (hereinafter, may be simply abbreviated as a maintenance method) according to an embodiment of the present invention will be given, and the configuration thereof will be described in detail.

<Natural turf for stadium>
The natural turf for a stadium to be maintained and managed in the maintenance method according to the present invention is, for example, a cold region type turf (winter turf) such as bentgrass. As described above, when selecting natural turf for a stadium, it is necessary to consider location conditions, growing environment, etc., but the maintenance method of the present invention is a method of maintaining natural turf throughout the year, and in winter. Considering maintenance, it targets cold-weather turf grass.

<Maintenance method of natural grass for stadium>
The maintenance method of the natural turf for the stadium of the present embodiment is a method of maintaining and managing the natural turf of the cold region type turf vegetated in the soil of the stadium, and the growing period for growing the natural turf and the natural turf A dormant period that temporarily stops the breeding is provided alternately. In the maintenance method of the present embodiment, the ambient temperature at least in the vicinity of the natural turf is set to more than 0 (° C) and less than 10 (° C) during the dormant period, and the daily integrated light amount (DLI) of the light with respect to the natural turf is set. The range is 0 to 40 (mol, m-2, day-1).

As mentioned above, in order to grow good natural turf, it is necessary to provide the six elements of temperature, light, water, nutrients (fertilizer), air, and soil in a well-balanced and appropriate condition. On the other hand, maintenance of natural turf is necessary even during the period when the stadium is not used due to the off-season of competition, etc., and it is required to simplify the maintenance during this period, save labor and reduce costs. In the present invention, as described in detail below, the period during which the stadium is not used is defined as the "dormant period" of the natural turf, and among the above six factors, in particular, the temperature and light conditions are appropriately adjusted. Maintenance is simplified by forcibly stopping the growth of natural turf and temporarily putting it to sleep in a state where it can be recovered, that is, it can be started (restarted).

Here, the "cultivation period" as used in the present invention is, for example, a period corresponding to the "season period" and the "preparation period before entering the season period" of various competitions using the stadium within one year. Yes, the "dormant period" is the period corresponding to the off-season and the like. That is, in a span spanning a plurality of years, the above-mentioned "growth period" and "dormant period" are alternately provided.

[Training period]
During the growing period of this embodiment, natural turf is grown under normal conditions. That is, the above six elements of temperature (atmosphere temperature), light (sunlight or illumination light), water (irrigation), nutrients (fertilizer), air (atmosphere), and soil (soil quality) are well-balanced and appropriate conditions. Grow natural turf while adjusting so that it becomes. By setting the above 6 elements in a well-balanced and appropriate condition, it is possible to grow good natural turf, but if any one of the 6 elements is missing, good natural turf can be obtained. It may not be there. That is, even if the balance of the above 6 elements is lost, the natural turf grows, but it is difficult to obtain a good natural turf. Therefore, it is required to adjust all of these 6 elements to appropriate conditions during the growing period. To.

In addition to the above six factors, appropriate management such as maintaining the plant height by mowing is also required in order to grow good natural turf during the growing period. Furthermore, it is important to take measures against pests and weeds that parasitize natural turf, and to properly repair damaged parts of turf.

During the growing period, it is preferable to grow the natural turf with the atmospheric temperature in the vicinity of the natural turf in the range of 15 to 20 (° C.). This is because after the dormant period, which will be described in detail later, the atmospheric temperature is raised to a temperature higher than this dormant period, so that the temperature rise becomes a switch and the recovery speed of the natural turf from the dormant state is significantly accelerated. Because. Here, if the atmospheric temperature in the vicinity of the natural turf during the growing period is higher than the upper limit of the atmospheric temperature (less than 10 ° C.) during the rest period described later, the above-mentioned effect of accelerating the recovery speed of the natural turf However, in order to obtain this effect more remarkably, it is preferable to set the atmospheric temperature in the range of 15 to 20 (° C.).

[Dormancy period]
In the present embodiment, as described above, the growth of natural turf is temporarily stopped during the dormant period.
Generally, the ground where the natural turf is vegetated requires the maintenance of the natural turf throughout the year regardless of whether the stadium is used or not. Therefore, the maintenance of natural turf can be simplified while the stadium is not used.
Hereinafter, each condition for stopping the growth of natural turf will be described in detail.

(temperature)
In the present embodiment, the atmospheric temperature is adjusted to more than 0 (° C.) and less than 10 (° C.) at least in the vicinity of the natural turf during the dormant period. By setting the temperature in the vicinity of the natural turf during the dormant period within the above range, the growth (growth) of the natural turf can be effectively put into a substantially stopped state.
If the atmospheric temperature in the vicinity of the natural turf is 0 (° C) or less, there is a risk of freezing, and in the worst case, the natural turf may die. Further, even if the natural turf does not die, it may not be possible to recover from the dormant state, which is not preferable.
On the other hand, if the atmospheric temperature in the vicinity of the natural turf is 10 (° C) or higher, it is difficult to stop the growth of the natural turf and it does not become dormant. It becomes difficult to simplify.
In addition, from the viewpoint of surely stopping the growth of natural turf and surely recovering from the dormant state in the subsequent growing period, the atmospheric temperature in the vicinity of the natural turf is set to more than 0 (° C) and less than 7 (° C). It is more preferable to set the temperature to about 5 (° C.), and it is particularly preferable to set the temperature to about 5 (° C.).

(light)
In the present embodiment, the daily integrated light intensity (DLI) of light with respect to natural turf during the dormant period is in the range of 0 to 40 (mol, m-2, day-1). By setting the atmospheric temperature in the vicinity of the natural turf during the dormant period within the above range and further setting the daily cumulative amount of light for the natural turf within the above range, the growth (growth) of the natural turf is effectively and almost stopped. Can be in a state.

By setting the daily cumulative amount of light to the natural turf during the dormant period to 0 (zero) (mol, m-2, day-1) in the light-shielded state, that is, in the above range, the natural turf can be effectively grown. You can stop. On the other hand, when stopping the growth of natural turf, the daily cumulative amount of light is allowed as long as the amount of light can be reliably stopped and the amount of light does not burn the leaves, so the upper limit is 40 (mol · m. -2. Day-1).
If the daily cumulative amount of light for natural turf exceeds 40 (mol, m-2, day-1), it is difficult to stop the growth of natural turf, and it may be difficult to enter a dormant state. The same training and maintenance as above is required, and it becomes difficult to simplify the maintenance.

In addition, during the dormant period, by giving a little light to the natural turf, nutrients by photosynthesis are accumulated and the recovery speed after that is accelerated, as will be described in detail later, and the daily cumulative amount of light is 20 (mol). -It is more preferable to set it to about m-2, day-1).

(Action by temperature and light)
As described above, in the present embodiment, the atmospheric temperature in the vicinity of the natural turf and the daily integrated light amount of the light during the dormant period are set as the conditions in the above range with respect to the natural turf of the cold region type turf grass. The growth (growth) of natural turf can be almost stopped. In this way, the growth of natural turf is stopped and the plant is put into a dormant state, so that the plant height does not increase, and maintenance such as mowing is not required.
On the other hand, by setting the dormant condition of the natural turf within the above range, it is possible to surely recover the natural turf from the dormant state by appropriately setting the condition in the subsequent growing period.

It is generally known that natural turf stops growing at low temperatures.
In addition, when light is given to natural turf, nutrients such as sucrose are accumulated by photosynthesis of chlorophyll (chlorophyll). On the other hand, when the light is shielded, the energy stored in the natural turf is consumed. These actions are the same even at low temperatures.
Then, when the temperature returns from the low temperature to the normal temperature, the natural turf starts to grow (starts and recovers from growing), but if there is nutrients accumulated by photosynthesis, the start-up speed at the start of growth increases.
From the viewpoint of nutrient accumulation during dormancy as described above, it is more preferable to give light to the natural turf with a light amount not too large by means such as LED supplementary light during the dormant period.

Here, a demonstration experiment of the action according to the present invention will be described with reference to the graphs shown in FIGS. 1 and 2.
FIG. 1 is a graph showing the relationship between the number of curing days and the amount of chlorophyll in the turf grass when the natural turf of the cold region type turf is cured under various conditions, and FIG. 2 is the graph showing the number of curing days and the amount of sucrose in the turf grass. It is a graph which shows the relationship with.

As shown in the graph of FIG. 1, when the natural turf was cured in a light-shielded state (at room temperature), the amount of chlorophyll in the turf grass decreased once and then increased from the 8th day. It is probable that this is because the natural turf placed in a light-shielded state sought light.
Further, when the atmospheric temperature is set to 5 ° C. and the natural turf is cured in a light-shielded state, the amount of chlorophyll in the turf grass is once drastically reduced and then slightly increased from the 8th day.
Further, when the atmospheric temperature was set to 5 ° C. and the natural turf was cured while being supplemented with the LED, the amount of chlorophyll in the turf grass decreased once and then slightly increased from the 8th day.

Further, as shown in the graph of FIG. 2, when the natural turf is cured in a light-shielded state (at room temperature), the amount of sucrose in the turf grass is drastically reduced.
Further, when the atmospheric temperature was set to 5 ° C. and the natural turf was cured in a light-shielded state, the amount of sucrose in the turf grass was further significantly reduced.
Further, when the atmospheric temperature was set to 5 ° C. and the natural turf was cured while being supplemented with the LED, the sucrose in the turf grass decreased once and then increased from the 8th day.

From the results of the above demonstration experiment, by setting the ambient temperature near the natural turf to 5 ° C and further performing LED supplementation, the growth of the natural turf can be stopped and the nutrients (sucrose) contained in the natural turf can be stopped. It can be seen that it is possible to increase.

(Other factors)
In the present embodiment, from the viewpoint of more effectively stopping the growth of natural turf during the dormant period and obtaining good natural turf, in addition to the above two elements of temperature and light, nutrients (fertilizer) are further added. It is more preferable to adjust each element of air, water and soil as follows.

First, regarding nutrients, it is more preferable that the amount of fertilizer applied to the soil during the dormant period is in the range of {no fertilizer application to the same amount as the growing period}.
That is, it is possible to more effectively stop the growth of natural turf during the dormant period by setting the upper limit of the fertilizer application amount to the same amount as the growing period even if fertilizer is not given or even if fertilizer is given. Become. In addition, by setting appropriate conditions during the subsequent growing period, it becomes possible to more reliably recover the natural turf from the dormant state.
If the amount of fertilizer applied during the dormant period exceeds the amount of fertilizer applied during the growing period, it is difficult to stop the growing of natural turf and it may be difficult to enter a dormant state. , It becomes difficult to simplify maintenance.

The method of applying fertilizer is not particularly limited, but for example, the amount of fertilizer applied is about 1/5 to 1/2 of the amount in the normal period (growth period), and the frequency is 2 to 4 times / week in the state of liquid fertilizer. Can be fertilized with.

Next, the air will be described. During the dormant period, it is more preferable that the atmosphere at least in the vicinity of the natural turf is the general atmosphere or the atmosphere in which CO ₂ is increased.
That is, by setting the atmosphere in the vicinity of the natural turf during the dormant period to the above-mentioned atmosphere, it is possible to more effectively stop the growth of the natural turf. In addition, by setting appropriate conditions during the subsequent growing period, it becomes possible to more reliably recover the natural turf from the dormant state.
Further, as the atmosphere in the vicinity of the natural turf, it is particularly preferable to generate a slight air flow so as not to cause stagnation in the air.

Next, regarding water, it is more preferable to irrigate the soil only when the surface of the soil is dry during the dormant period.
By limiting the irrigation of the soil only when the surface of the soil is dry, it is possible to obtain good natural turf because the irrigation does not become excessive and root rot can be prevented from occurring in the natural turf. Become.

Next, the soil will be described. In the method for maintaining and managing the natural turf of the present embodiment, it is more preferable that the soil is sandy soil.
Since the soil is sandy soil, drainage is good as described above, so that root rot and the like can be prevented and good natural turf can be obtained.

[Action effect]
As described above, according to the maintenance method of the natural turf for the stadium of the present embodiment, the atmospheric temperature in the vicinity of the natural turf during the dormant period exceeds 0 (° C) with respect to the natural turf of the cold region type turf. By setting the temperature to less than 10 (° C) and setting the daily cumulative amount of light to the natural turf in the range of 0 to 40 (mol, m-2, day-1), the growth of the natural turf is almost stopped. can do. That is, since the plant height of the dormant natural lawn does not grow, maintenance such as mowing is not required.
Further, by setting the dormant condition of the natural turf within the above range, the natural turf can be surely recovered from the dormant state by appropriately setting the condition in the subsequent growing period.
Therefore, the maintenance of natural turf can be simplified during the period when the stadium is not used, and labor saving and cost reduction can be achieved.

Next, examples of the present invention will be shown and the present invention will be described in more detail, but the scope of the present invention is not limited by the present examples.

In this example, in order to confirm the effect of the dormant period specified in the present invention, the growing condition was confirmed after curing the natural turf for 30 days under the conditions of Experimental Examples 1 to 5 shown in Table 1 below. ..
In this example, Kentucky bluegrass, which is a cold region type turf grass, was used as the natural turf to be cultivated.
Further, the supplementary light by the LED in Experimental Example 3 and Experimental Example 5 shown in Table 1 below was adjusted so that the daily integrated light amount was about 20 (mol, m-2, day-1).
Further, in Experimental Example 4 shown in Table 1 below, the atmospheric temperature condition of the natural turf was set to 5 ° C. for the first two weeks in a light-shielded state, and then exposed to the outside air for about two weeks under the outside air temperature (normal temperature). The light from the sunlight was given.
Further, in Experimental Example 4 shown in Table 1 below, for the first two weeks, the atmospheric temperature condition of the natural turf was set to 5 ° C., and the light was supplemented by the LED. It was exposed to sunlight under normal temperature).
In this example, fertilization was appropriately carried out.

Then, in order to confirm the growing condition of the natural turf in each experimental example, the plant height and the root elongation dimension were measured, and the results are shown in Table 1 below.

As shown in Table 1, in Experimental Example 1 in which the atmospheric temperature condition of the natural turf was set to the outside air temperature (normal temperature) and the light was shielded, the plant height grew in the range of 10 mm or more and less than 25 mm, and the roots grew. It was 10 mm or less.
Further, in Experimental Example 2 in which the atmospheric temperature condition of the natural turf was 5 ° C. and the light was shielded, the plant height elongation was 10 mm or less and the root elongation was 10 mm or less.
Further, in Experimental Example 3 in which the atmospheric temperature condition of the natural turf was set to 5 ° C. and the supplementary light was supplemented by the LED while blocking the light from the outside, the plant height elongation was 10 mm or less and the root elongation was 10 mm or less. there were.
In addition, in Experimental Example 4 in which the atmospheric temperature condition of the natural turf was set to 5 ° C. for the first two weeks, and then the plant was exposed to the outside air for about two weeks and exposed to sunlight under the outside air temperature, the plant height was extended. Was in the range of 10 mm or more and less than 25 mm, and the root elongation was also in the range of 10 mm or more and less than 25 mm.
For the first two weeks, the atmospheric temperature condition of the natural turf was set to 5 ° C, and the light was supplemented by the LED while blocking the light from the outside. In Experimental Example 5 to which light was applied, the plant height was 25 mm or more and the root growth was 25 mm or more.

From the results of Experimental Example 1 and Experimental Example 2, it can be seen that the growth of natural turf is generally stopped when the atmospheric temperature condition is set to a low temperature state, but is further stopped when the atmospheric temperature condition is set to a light-shielded state.
In addition, from the results of Experimental Example 3, it can be seen that even when supplementary light is applied, the growth of natural turf is stopped and the turf becomes dormant under the low temperature condition and the light shielding condition.
On the other hand, from the results of Experimental Example 4, the natural turf was put into a dormant state by stopping the growth of the natural turf under low temperature conditions and shading conditions, and then the atmospheric temperature condition was set to the outside air temperature (normal temperature) and the natural turf was exposed to sunlight. It can be seen that the turf escapes from the dormant state and becomes a growing state.
Furthermore, from the results of Experimental Example 5, the natural turf was rapidly grown by setting the atmospheric temperature condition to the outside air temperature and exposing it to sunlight after the direction was taken while stopping the growth of the natural turf under low temperature conditions and shading conditions. It can be seen that the dormant state is taken out and the growing state is reached.

Based on the results of the examples described above, the ambient temperature in the vicinity of the natural turf is set to a low temperature condition for the natural turf of the cold region type turf, and the daily cumulative amount of light for the natural turf is shielded or 40 (mol · m-. 2.day-1) It was clarified that the growth of natural turf was almost stopped and the turf became dormant under the following conditions. Further, by supplementing the natural turf with the above-mentioned conditions while stopping the growth of the natural turf under low temperature conditions and shading conditions, the atmospheric temperature is subsequently raised to the outside air temperature and exposed to sunlight. At that time, it became clear that the turf rapidly escaped from the dormant state and grew. Therefore, by applying the maintenance method of the natural turf for the stadium according to the present invention, the maintenance of the natural turf during the dormant period can be simplified, but the natural turf can be maintained depending on the subsequent temperature rise and light conditions. It was confirmed that it is possible to surely recover from the dormant state.

The method for maintaining and managing natural turf for a stadium of the present invention can simplify the maintenance and management of natural turf during a period when the stadium is not used, and can save labor and cost. Therefore, for example, baseball. It can be widely applied to the maintenance of natural turf in various sports such as soccer, rugby, and tennis.

Claims (6)

It is a maintenance method of natural turf for stadiums, which maintains the natural turf of cold region type turf vegetated in the soil of the stadium.
A growing period for growing the natural turf and a dormant period for temporarily stopping the growing of the natural turf are alternately provided.
During the dormant period, the ambient temperature in the vicinity of the natural turf is at least 0 (° C.) and less than 10 (° C.), and the daily cumulative amount of light for the natural turf is 0 to 40 (mol · m-2 · day). -1) A method for maintaining and managing natural turf for stadiums, which is characterized by the range of 1). The maintenance method for natural turf for a stadium according to claim 1, wherein the dormant period is such that the amount of fertilizer applied to the soil is in the range of {no fertilizer application to the same amount as the growing period}. .. The maintenance of the natural turf for a stadium according to claim 1 or 2, wherein the dormant period is such that the atmosphere in the vicinity of the natural turf is at least a general atmosphere or an atmosphere in which CO ₂ is increased. Method. The maintenance of the natural turf for a stadium according to any one of claims 1 to 3, wherein the dormant period is to irrigate the soil only when the surface of the soil is dry. Method. The method for maintaining and managing natural turf for a stadium according to any one of claims 1 to 4, wherein the soil is sandy soil. Claims 1 to 5, wherein after the dormancy period ends, the natural turf is grown in the growing period with the atmospheric temperature in the vicinity of the natural turf in the range of 15 to 20 (° C.). The maintenance method for natural turf for stadiums described in any one of the items.

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