JP2005110589A - Method for growing turf grass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To omit spraying of a growth retardant on an over-seeding region of seeds. <P>SOLUTION: Seeds 3 for over-seeding are obtained by previously soaking the seeds for turf grass 2 in a solution of the plant growth-retarding agent in a method for developing the turf grass by seeding the seeds for the turf grass 2 for over-seeding on a lack region 1a of the turf grass 2 in a developed land 1 of the turf grass 2 treated for preventing spindly growth with the plant growth-retarding agent to grow the turf grass 2 at the vegetation density equal to that at the surrounding part of the lack region 1a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for growing turfgrass.

  One method of turfgrass cultivation is to create a turfgrass nursery while maintaining low illuminance in the preliminary cultivating stage, and transplanting this nursery to the actual pitch, green, etc. Some of them have dense turf and a fine turf grass.

  Since the growth of turfgrass under such low light is accompanied by a puppeteer, in general, a plant growth inhibitor (a vegetative agent) is regularly sprayed on the surface for the purpose of preventing the esteem. When it is ingested into plants, the effect of minimizing is strongly expressed and elongation is extremely suppressed. Therefore, it is necessary to spray it at an appropriate concentration and at an appropriate interval. In addition, when trying to create turfgrass, the growth of turfgrass may partially retreat due to disease or other factors, and a missing part may be generated.

  Therefore, it is necessary to sown seeds on the part where the growth is poor and to make it uniform with the surrounding part. Moreover, even in the turfgrass that has been sowed, it is necessary to spray a growth inhibitor on the foliage in about 1 to 2 weeks after germination in order to prevent the pupae.

  However, in such a conventional method, the inhibitor may dissipate to the existing growth side on the boundary with the existing growth site, which may cause poor growth. In this case, the vegetation density is not uniform. This causes a loss of uniformity at the boundary.

  In addition, when the additional seeding site covers a large area, the spraying area of the inhibitor also increases accordingly, which requires a large amount of work and thus has a practical difficulty.

  The present invention solves the above-mentioned problems, and its object is to provide a method for growing turfgrass, in which the application of a plant growth inhibitor in the seed sowing site is omitted and the amount used is also the minimum necessary amount. Is.

  In order to achieve the above object, the method of the present invention is the same vegetation as the peripheral part of the missing part by sowing turfgrass seeds for additional sowing in the lacking part of the turfgrass in the turfgrass formation area that has been subjected to the stagnation treatment with the plant growth inhibitor. In the turfgrass production method for growing turfgrass at a density, the seed for seeding is characterized in that a turfgrass seed is impregnated in advance with a solution of a plant growth inhibitor.

  Further, the seed for seeding used in the method of the present invention is obtained by impregnating turfgrass seeds beforehand in a solution of a plant growth inhibitor, lifting and drying.

  In the method of the present invention, at the time of germination, the plant length is suppressed by the plant growth inhibitor that has already been incorporated into the plant body. Therefore, the foliar spraying of the inhibitor after germination becomes unnecessary, and labor saving can be achieved. . In addition, compared with the method of spraying the inhibitor on the foliage surface, the fixing rate of the regulator in the plant body is increased, so that the amount of the regulator used can be reduced. Can also be prevented.

  Moreover, in invention of Claim 2, construction can be simplified by using the seed processed beforehand in another place instead of on-site processing.

  Hereinafter, the best mode for carrying out the method of the present invention will be described. There are many types of turfgrass to which the method of the present invention is applied. The turfgrass is roughly divided into two types, warm field turfgrass typified by wild turf and Korean turf, and cold field type. However, the method of the present invention is suitable for the latter cold region turfgrass.

  Typical examples of cold region turfgrass include green bentgrass belonging to the genus Agrotis, colonial bentgrass, Kentucky bluegrass belonging to the genus Poa, rough bluegrass, fine fescue belonging to the genus Festuca, tall fescue, perennial ryegrass belonging to the genus Lolium, Italian ryegrass Etc. are listed.

  The above cold turfgrass has bright green to dark green leaf color, is very beautiful, has good cold resistance, and can maintain a green color even in winter. Greens, tees, fairways, soccer pitches, racetracks, etc. are prized as decorative turf grasses. On the other hand, it also has the disadvantages that it is difficult to grow under high temperature and high humidity conditions, has low disease resistance, and is difficult to manage.

  The above-mentioned cold region type turfgrass is sown with a moderate degree of dispersion of turfgrass seeds on a turfgrass site with good drainage in an atmosphere under low illuminance such as a barn. As a result of being nurtured by cutting or the like, turfgrass 2 is propagated in the turfgrass site 1 as shown in FIG. In addition, the figure shows a schematic concept simply symbolized, and actually becomes a carpet-like dense turf grassland.

  Then, after the turfgrass 2 germination, when the leaves have grown to some extent, a plant growth inhibitor (hereinafter referred to as a dwarfing agent) is sprayed on the foliage to prevent the growth of the leaves. It is covered with a carpet on the entire surface with turf grass 2 grown to a dense and uniform plant height.

  The dwarfing agent used in the method of the present invention is used for suppressing wasteful turfgrass growth under low illuminance and suppressing growth to some extent, and a representative example thereof is a paclobutrazol agent (for example, bounty Flowable (trade name)) and flurpsomidol agent (for example, Greenfield (trade name)).

As a construction method of the present invention, useless growth is suppressed by spraying a dilute solution having a predetermined concentration obtained by dissolving the rinsing agent in water. For example, the dilution rate is 5000 to 10000, the spraying interval is 1 time / day or 1 time / 2 days, the spraying amount per time is about 0.2 to 1 liter / m ² , and it is regular until growth. As a result, the average plant height of the turf grass is made dense with a plant height averaged to about 2 to 3 cm by appropriate trimming.

  Even if the breeding management is carried out as described above, as shown in (b), for example, damage to the sports competition, diseases, omissions due to the spread of weeds, pest damage, pests of the applied regulator Due to an excessive hatching phenomenon due to uneven distribution, the missing portion 1a may occur in an island shape.

  Therefore, when such a missing part 1a occurs, the part 1a is subjected to appropriate treatments such as topsoil replacement and disinfection according to the cause, and then the seed 3 for repair is overseeded. .

  The modified seed 3 is impregnated for a predetermined time (for example, about 1 hour) in the same dwarfing agent solution obtained by diluting the same seed 1 as described above at an appropriate dilution ratio, and then the seed is taken out from the diluted solution. Use the same thing.

  The dilution factor of the dwarfing agent is preferably 5000 to 10,000 times depending on the grass species to be used, and the soaking time is preferably about 1 to 30 minutes. The adjustment agent impregnated in the seed is applied to the plant body as in the case of foliar application. After being taken in, seeded and sprouting, the fungicide acts to achieve an appropriate degree of growth without producing a head. In addition, since immersion continues even during drying, there is no problem even if the immersion time is as short as about 1 minute.

  Therefore, the turfgrass 2 grows in the missing part 1a without accompanying a puppet like the other general parts. In addition, the degree of growth is lower than the general part due to the delay of the sowing date, and the repaired part is conspicuous in the initial state, but the boundary between the missing part 1a and the general part of the site 1 depends on the growth. It becomes inconspicuous and a uniform turf grassland can be obtained.

  In addition, as the modified seed 3 for repairing the missing part, a seed soaked with a general seed may be used as it is, or the same effect can be obtained by using a seed soaked, air-dried and stored in advance. .

  In this embodiment, perennial ryegrass is used as the turf grass to be cultivated, but it is needless to say that it can also be applied to other sowing-cultivated cold field turfgrass, and further to warm field turfgrass.

== Purpose ==
The following tests (1) to (3) were performed on the turfgrass seeds to examine whether or not the turfgrass seeds were effective.
(1) Whether or not germinated plants show a hatching effect when turf grass seeds are soaked in a plant growth regulator (dwarfing agent) for a certain period of time and then sown. Check the optimum solution concentration, immersion, and water absorption time for obtaining a dwarfing effect.
(2) Whether or not there is a hatching effect when the treatment is carried out as in (1) and seeded after drying as shown in (1), and whether there is a decrease in germination rate. Also, check the optimal solution concentration, immersion, and water absorption time.
(3) Assuming the case of seeding on the actual pitch, whether or not the agent attached to the seed surface is washed away by irrigation water and the effect of the agent does not decrease. Also, check the optimal solution concentration, immersion, and water absorption time.

== Confirmation of hatching effect (Purpose 1) ==
1) Conditions and methods-Grass type used Perennial ryegrass: Imagine (variety name)
-Type and concentration of dwarfing agent Absorbent cotton in a petri dish was impregnated with 10,000-fold, 5000-fold, and 1000-fold diluted bounty flowables to form a nursery bed. Deionized water was used as a control.
・ Processing conditions:
(a) Absorbent cotton was spread on a polysterilized petri dish having a diameter of 9 cm, and this was impregnated with a rinsing agent solution having a predetermined concentration.
(b) About 200 turfgrass seeds were sown on absorbent cotton, pressed lightly and immersed in the solution.
(c) The petri dish was placed at 25 ° C. under room light conditions (about 1000 lux), and water absorption of the seeds was started.
(d) 1) After 24 hours, 2) After 48 hours, 20 grains were transferred from each dish to a dish containing absorbent cotton and germinated and grown under the same conditions of 25 degrees C and 1000 lux.
(e) A germination and growth in a fermenting agent and a germination and growth in deionized water were performed simultaneously.

2) Results Perennial ryegrass will germinate in about 3 days under 25 ° C, which is the germination environment in this test, under sealed conditions. Therefore, 24 hours and 48 hours, which do not lead to germination and that water absorption necessary for germination has progressed to some extent, were adopted as the immersion and water absorption time. In this test, initial growth was observed for up to 2 weeks after germination at 25 degrees C and 3000 lux.
Although the concentration of the bounty flowable solution was 1000, 5000, and 10,000 times, a clear hatching effect was observed in the initial growth at any concentration, and it was clear that a hatched seedling was obtained by using the soaked seeds. Became. However, there was no significant difference in the degree of hatching between the 24-hour treated seeds and the 48-hour treated seeds.
Seeds that had been sown in a “medium” containing bounty flowable at each concentration and continued to grow did not show significant inhibition of germination itself, but after that, it seemed that the growth was apparently stopped. It was.

== Dwarfing effect and germination rate of dried treated seeds (Purpose 2) ==
1) Conditions and methods-Grass type used Perennial ryegrass: Divine (variety name)
・ Type and concentration of dwarfing agent Bounty flowable was diluted 10,000 times, 5000 times, and 1000 times and poured into a petri dish.
・ Processing conditions
(a) Absorbent cotton was laid in a 9 cm diameter polysterilized petri dish, and a predetermined concentration of the rosinizer solution was injected therein.
(b) About 200 turfgrass seeds were placed in a petri dish and immersed in the solution.
(c) The petri dish was placed in an indoor environment to start water absorption of seeds.
(d) 1) After 1 minute, 2) After 10 minutes, 3) After 30 minutes, the petri dish solution was poured out.
(e) After air-drying on a petri dish for 3 days, 25 grains were transferred to a petri dish containing absorbent cotton containing deionized water, and germinated and grown under conditions of 25 degrees C and 3000 lux.
(f) At the same time, untreated (Control) seeds were sown under the same conditions.
(g) After 2 weeks, germination rate and plant height were investigated.

2) Results-Germination rate survey The results of the germination rate survey are shown in Fig. 2. In the figure, it was found that the germination rate of the untreated seed was 100%, whereas the germination rate of the treated seed was somewhat reduced. However, the guaranteed germination rate of purchased seeds is 85% or more. Among the treated seeds, those with 1000 times and 5000 times diluted solution soaking exceeded this, and germination rate of 10000 times seeds was 80. %, Which was not a problem for practical use. Thus, the lower the germination rate was, the lower the treatment concentration was. Further, no correlation was found between the soaking / water absorption time and the germination rate.

-Hatching effect on hatching agent solution concentration and soaking time Figure 3 shows the results of the plant height survey. Compared to the above experiment, the immersion / water absorption time was within 24 hours and within 48 hours to 30 minutes, but a sufficient hatching effect was observed. There was a correlation between the solution concentration and the hatching effect. At 1000 times, some individuals stopped growing several mm after germination. At 10,000 times, the leaf color was light, and there was a tendency to increase. Therefore, it was judged that about 5000 times is suitable for perennial ryegras. Between the soaking / water absorption time and the hatching effect, the tendency was not observed at 1000 times and 5000 times, but when 10,000 times, the longer the time, the stronger the hatching effect was considered. In the case of adopting 5000 times, it was considered that about 1 minute was sufficient in consideration of work efficiency of immersion / water absorption.

== Hatching effect and germination rate of hatched seeds treated with water (Purpose 3) ==
1) Conditions and methods-Grass type used Perennial ryegrass: Divine (variety name)
・ Type and concentration of dwarfing agent Bounty flowable was diluted 10,000 times, 5000 times, and 1000 times and poured into a petri dish.
・ Processing conditions
(a) A bactericide solution having a predetermined concentration was poured into a 9 cm diameter polysterilized petri dish.
(b) About 200 turfgrass seeds were placed in a petri dish and immersed in the solution.
(c) The petri dish was placed in an indoor environment to start water absorption of seeds.
(d) 1) After 1 minute, 2) After 10 minutes, 3) After 30 minutes, the petri dish solution was poured out.
(e) After drying for about 3 days, 25 grains were transferred to a petri dish containing absorbent cotton soaked with deionized water, and germinated and grown under conditions of 25 degrees C and 3000 lux.
(f) At the same time, untreated (Control) seeds were sown under the same conditions.
(g) About half of the petri dishes were irrigated once a day for one week after sowing. Specifically, deionized water was poured into the seeds on the petri dish from the washing bottle, stopped before the seeds floated, and the work of flushing the irrigation water in the petri dish was repeated three times.
(h) After 2 weeks, germination rate and plant height were investigated.

2) Results-Germination rate survey The results of the germination rate survey are shown in Fig. 4. It was reconfirmed that the germination rate of untreated seeds was 100%, whereas the germination rate of hatched seeds was somewhat reduced. There was no correlation between soaking / water absorption time and germination rate. Moreover, the change of the germination rate by the irrigation process was not recognized.

-Hatching effect on irrigation treatment The tendency of the hatching agent solution concentration and the hatching effect showed a positive correlation as in the above experiment. The hatching effect on the irrigation treatment showed a certain decrease compared to the experiment. The hatching effect by the 5000-fold dwarfing agent solution that gave a good result in the experiment was equivalent to the hatching effect by irrigation after treatment with 1000-fold dwarfing agent.
However, in the field of irrigation treatment, the treatment intensity (irrigation frequency) is indeterminate, so if the seeds treated with 1000 times the fertilizer were not irrigated much, the practical growth range of perennial ryegrass would be reduced. Since there is a risk of lowering, it is judged that treatment with a 5000-fold soaking agent is most preferable.
Between the soaking / water absorption time and the hatching effect, the hatching effect tended to be strong for those subjected to the treatment for 30 minutes.

(A)-(c) is typical explanatory drawing which shows this invention method. It is a graph which shows the relationship between a dressing agent density | concentration, immersion time, and a germination rate. It is a graph which shows the relationship between a dressing agent density | concentration, immersion time, and plant height. It is a graph which shows the relationship between a germination agent density | concentration, immersion time, watering treatment, and a germination rate. It is a graph which shows the relationship between a drought agent density | concentration, immersion time, irrigation treatment, and plant height.

Explanation of symbols

1 Turfgrass site 1a Missing part 2 Turfgrass 3 Modified seed

Claims (2)

In a turfgrass production method in which turfgrass seeds for seeding are sown in a turfgrass missing site in a turfgrass formation site that has been treated with a plant growth inhibitor to grow turfgrass with the same vegetation density as the peripheral part of the missing site ,
The method for growing turfgrass, wherein the seed for seeding is a turfgrass seed previously impregnated in a solution of a plant growth inhibitor. The method for growing turfgrass according to claim 1, wherein the seeds for additional seeding are seeds that have been impregnated with a turfgrass seed in advance in a solution of a plant growth inhibitor and then pulled and dried.

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