JP2013128435A - Method for converting existing weed grass plot by using centipede grass - Google Patents
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Abstract
Description
本発明は、既存の雑草芝地を、センチピート芝種子の播種によりセンチピート芝に転換する方法に関する。詳細には、野芝、高麗芝、チガヤ等で構成されている既存の芝地の維持管理を容易にするために、これらの芝地にセンチピート芝を育成させ、センチピート芝で構成されている芝地に転換する方法に関する。 The present invention relates to a method for converting existing weed turf to centipeat turf by sowing centipeat turf seeds. Specifically, in order to facilitate the maintenance management of existing turf that consists of wild turf, ginseng turf, chigaya, etc. It is related with the method of changing to the lawn.
変電所・発電所等の敷地では、砂の飛散防止、景観、温度上昇抑制などの環境対策上、芝生を造成している。変電所・発電所等の芝地の多くが野芝、高麗芝、遷移してきたチガヤ等で構成されており、品質の維持管理に毎年２〜３回程度の除草作業や薬剤散布、施肥を実施している。近年、他感作用の強いＤＮＡ改変型センチピート種が開発されたことから、先進的試験が実施され、既に本施工も始まっている。 In substations and power plants, lawns are created for environmental measures such as prevention of sand scattering, landscape, and temperature rise control. Most of the turf areas such as substations and power plants are composed of wild turf, ginseng turf, and transitional chigaya. Weeding, chemical spraying and fertilization are carried out about 2-3 times a year for quality maintenance. doing. In recent years, since a DNA modified centipeat species having a strong other feeling has been developed, an advanced test has been carried out, and this construction has already begun.
センチピート種の種子は、耐寒性に弱い性状を改良し、痩悪地に強く、強アレロパシー性状、耐寒性、耐旱性を有するところから、芝刈回数１回／年、除草剤散布不要、施肥不要などのメンテナンスフリーに近い扱いが可能で、極めて有効な維持管理費用の削減手段となりつつある（例えば、特許文献１参照）。なお、センチピート種改良型は、普通種と区別するために、通称「ティフ・ブレア」と呼称されている。 The seeds of centipeat seeds have improved properties that are not resistant to cold resistance, are strong against harsh land, have strong allelopathic properties, cold resistance, and drought resistance, so mowing frequency is once a year, no herbicide spraying required, fertilization It can be handled almost maintenance-free such as unnecessary, and is becoming an extremely effective means for reducing maintenance costs (see, for example, Patent Document 1). The centipeat seed improved type is commonly called “Tiff Blair” in order to distinguish it from ordinary seeds.
しかしながら、従来の芝生をセンチピート芝に転換する場合、センチピート芝がドイツ特許品種であることから、単位重量当たりの種子価格が従来型芝生種の約１５倍と高価であることや、従来の転換施工法では全面播種が汎用されてきたために、施工単価が高いものとなっている。そのため、従来の芝生をセンチピート芝に効率的に転換できる方法が模索されていた。 However, when converting conventional turf to centipeat turf, centipede turf is a German patent varieties, so the seed price per unit weight is about 15 times as expensive as conventional turf varieties, In the conversion construction method, since sowing has been widely used, the construction unit cost is high. Therefore, a method for efficiently converting the conventional lawn to centipeat lawn has been sought.
また、南関東地区などの地下水位が高い敷地や透水係数が低い敷地において、滞水に脆弱であるセンチピート芝種子の未発芽、衰退・消滅が認められるなどの課題がある。 In addition, on sites with high groundwater levels such as the South Kanto area and sites with low hydraulic conductivity, there are issues such as the ungerminated, declined and disappeared centipeat lawn seeds that are vulnerable to water retention.
本発明は、上記事情に鑑みてなされたものであり、野芝、高麗芝、チガヤ等で構成されている既存の雑草芝地に、滞水性に弱いセンチピート芝を育成させ、効率よく低コストでセンチピート芝で構成されている芝生地に転換させる方法を提供することを課題とする。 The present invention has been made in view of the above circumstances, and centipeat turf that is vulnerable to water retention is cultivated on an existing weed turf composed of wild turf, ginseng turf, chigaya, etc., and it is efficient and low cost. It is an object of the present invention to provide a method for converting to turf land composed of centipeat turf.
本発明者らは、前記課題を解決するため鋭意検討した。そして、種子面からは、播種量の減量方法、土壌滞水に対する脆弱性の対処方法、匍匐茎種子のランナー性状を検討し、また、生育基盤面からは、過湿土壌の改良策、基盤方位の在り方、汎用機械（耕運機、芝刈機）の能力・転用性を検討した。その結果、既存の雑草芝地を耕した一部区画にセンチピート種を播種することにより、播種量の減量と、センチピート芝の生育促進が可能になることを見出し、本発明に到達した。 The present inventors diligently studied to solve the above problems. From the seed surface, we examined the method of reducing the sowing amount, how to deal with the vulnerability to soil stagnation, and the runner properties of the stem seeds. We investigated the capacity and diversion of general purpose machines (cultivators, lawn mowers). As a result, the present inventors have found that it is possible to reduce the seeding amount and promote the growth of centipeat turf by sowing centipeat seeds in a partial section where the existing weed turf land is cultivated.
すなわち、本発明は、以下の通りである。
（１）既存の雑草芝地をセンチピート芝の種子によりセンチピート芝に転換する方法であって、センチピート芝に転換する既存の雑草芝地を、センチピート芝の種子を播種する播種区とセンチピート芝の種子を播種しない雑草残置区とに分割し、播種区の間に雑草残置区を設け、播種区と雑草残置区との面積比を２〜５：１の範囲とするとともに、前記播種区を耕耘地、前記雑草残置区を未耕耘地として所定幅の畝を形成した後、耕耘した播種区にセンチピート芝の種子を播種することを特徴とするセンチピート芝への転換方法、
（２）播種区をジグザグパターンに形成し、ジグザグパターンの凸状部もしくは孤状部を南側に設けることを特徴とする上記（１）に記載のセンチピート芝への転換方法、
（３）播種区が盛土されていることを特徴とする上記（１）又は（２）に記載のセンチピート芝への転換方法。
That is, the present invention is as follows.
(1) A method of converting an existing weed turf to centipeat turf with centipeat turf seeds, the existing weed turf that is converted to centipeat turf, and a sowing area for seeding centipeat turf seeds; Dividing the seeds of centipeat turf into the weed residue area that does not sow, providing a weed residue area between the sowing areas, and setting the area ratio of the sowing area and the weed residue area to a range of 2 to 5: 1, A method for converting to centipeet turf, characterized in that seeds of centipeat turf are sown in the cultivated sowing area after forming a ridge of a predetermined width with the sowing area as a cultivated area and the weed residue area as an uncultivated area,
(2) The sowing section is formed in a zigzag pattern, and the convex or isolated portion of the zigzag pattern is provided on the south side.
(3) The method for converting to centipeat turf according to (1) or (2) above, wherein the sowing section is filled.
本発明によれば、センチピート芝の種子を全面播種しないため、資材・土壌改良費等の転換時イニシャルコストを２／３程度に削減することが可能となる。また、センチピート芝の生育にともない、雑草残置区の雑草や芝生が枯損するので、数年後には既存の雑草芝地をセンチピート芝地に転換することが可能となる。芝の成育後は、年１回程度の除草で良いため、芝刈り、除草剤散布及び施肥等の維持管理コストを大幅に削減することが可能となる。 According to the present invention, since the seeds of centipeat turf are not sown, it is possible to reduce the initial cost at the time of conversion such as materials and soil improvement costs to about 2/3. In addition, weeds and lawns in the weed-remaining areas are withered with the growth of centipeat turf, so that it is possible to convert existing weed turf to centipeat turf in a few years. After turf growth, weeding about once a year is sufficient, so that maintenance costs such as lawn mowing, herbicide spraying and fertilization can be greatly reduced.
本発明に係るセンチピート芝への転換方法では、既存の野芝、高麗芝、チガヤ等で構成されている、センチピート芝に転換する既存の雑草芝地を、所定の面積比で、センチピート芝の種子を播種する播種区と、センチピート芝の種子を播種しない雑草残置区とに分割し、播種区の間に雑草残置区を設けるようにする。播種区を耕耘地、雑草残置区を未耕耘地として所定幅の畝を形成した後、耕耘した播種区にセンチピート芝の種子を播種する。 In the method for converting to centipeat turf according to the present invention, the existing weed turf that is made up of existing wild turf, ginseng turf, chigaya, etc., and converted to centipeat turf is obtained at a predetermined area ratio. The plant is divided into a sowing group for sowing seeds of turf and a weed residue group that does not sow centipeat seeds, and a weed residue group is provided between the sowing groups. After the sowing area is cultivated and the weed residue area is an uncultivated area, a ridge of a predetermined width is formed, and then the cultivated sowing area is sown with centipeat lawn seeds.
図１は、センチピート芝に転換する１００ｍ２以上の定面積の既存の雑草芝地を、センチピート芝の種子を播種する播種区と、センチピート芝の種子を播種しない雑草残置区とに分割した、好ましい一実施形態を示す区画概念図である。図中、Ａは播種区、Ｂは雑草残置区を示す。 1, divides the existing weeds turf 100 m 2 or more constant area converted to centimeters Pete turf, and seeded District of sown cm peat turf, on the weeds leaving Ward not sown cm peat sod It is the division conceptual diagram which shows one preferable embodiment. In the figure, A indicates the sowing zone, and B indicates the weed residue zone.
図１に示す区画を設ける場合は、耕耘機等により０．６ｍ〜１．２ｍの幅でジグザグパターンに、かつ南側にジグザグパターンの頂点が来るように弧形もしくは凸型に耕耘することが好ましい。更に、この耕耘地より０．３ｍ〜０．６ｍ離隔を確保して次の雑草芝地を弧形もしくは凸型に耕耘することが好ましい。この要領を繰り返して芝種の転換対象となる雑草芝地の全面積に、耕耘地（０．６ｍ〜１．２ｍ幅）と未耕耘地（０．３ｍ〜０．６ｍ幅）を交互に形成することで畝を形成する。このように耕耘して畝を形成し、盛土された排水良好地（耕耘地）と滞水地（未耕耘地）に分けることで、耕耘された土地の水を未耕耘地に集水することができる。 When the section shown in FIG. 1 is provided, it is preferable to plow in an arc shape or a convex shape by a tiller or the like in a zigzag pattern with a width of 0.6 m to 1.2 m so that the apex of the zigzag pattern comes to the south side. . Further, it is preferable to secure a separation of 0.3 m to 0.6 m from the cultivated land and cultivate the next weed turf in an arc shape or a convex shape. By repeating this procedure, cultivated land (0.6m to 1.2m width) and uncultivated land (0.3m to 0.6m width) are alternately formed on the total area of weed turf that is the target of turf species conversion. By doing so, a cocoon is formed. Collecting water from cultivated land to uncultivated land by dividing it into well drained land (cultivated land) and stagnant land (uncultivated land) by plowing to form ridges in this way Can do.
本発明では、センチピート芝の種子を播種する播種区Ａを耕耘地とする。具体的には、既存の野芝、高麗芝、チガヤ等で構成されている雑草芝地を、耕耘機等で耕して雑草を鋤き込むことで播種区を形成する。耕耘機による耕耘回数は１回で良いが、更に必要によりダブル耕耘を実施するのが良い。１列耕耘でも２列耕耘でも良い。雑草鋤き込みにより、鋤き込んだ雑草が肥料化して発芽した苗の生育を促進する効果がある。 In the present invention, the sowing section A in which seeds of centipeat turf are sown is used as a cultivated land. Specifically, a sowing area is formed by cultivating a weed turf composed of existing wild turf, ginseng turf, chigaya, etc. with a cultivator or the like and sowing the weeds. The number of times of cultivating with the cultivator is one, but it is better to carry out double cultivating if necessary. Single row tillage or two row tillage may be used. The weed planting has the effect of promoting the growth of seedlings that have been germinated by fertilizing the weed plant.
播種区Ａは、上記の耕耘により土壌中に空気が入り込むことで、元の表土の高さよりも約５〜１０ｃｍ高く盛土されることになる。かかる盛土層が形成されることにより、南関東地区などの地下水位が高い敷地や透水係数が低い敷地では、耕耘による排水良好地となる効果に加えて盛土による排水改善効果があるため、滞水に脆弱であるセンチピート芝種子の発芽率を向上させ、センチピート芝の衰退・消滅を減少させることができる。 In the sowing section A, when the air enters the soil by the above-described tillage, the sowing section A is filled up by about 5 to 10 cm higher than the height of the original topsoil. Due to the formation of this embankment layer, on sites with high groundwater levels such as the South Kanto region and on sites with low permeability, there is a drainage improvement effect due to embankment in addition to the effect of drainage by plowing. It is possible to improve the germination rate of centipeat turf seeds, which are fragile, and to reduce the decline and disappearance of centipeat turf.
一方で、センチピート芝の種子を播種しない雑草残置区Ｂを、未耕耘地としておく。未耕耘地とすることで、そこに耕耘地の降雨が集水し、滞水されることで細菌が繁殖しやすくなり、雑草残置区Ｂに自生している、湿地に弱いチガヤやノシバ等を経時により枯損、衰退させやすくなる。 On the other hand, the weed residue section B where seeds of centipeat turf are not sown is set as an uncultivated land. By making it an uncultivated land, the rain in the cultivated area collects water, and it becomes easy for bacteria to propagate by being stagnated. It becomes easy to wither and fade over time.
播種区Ａと播種区Ａの間には、雑草残置区Ｂを設け、交互に播種区Ａと雑草残置区Ｂを設けるようにするのが良い。こうすることにより、播種区で発芽・生育したセンチピート芝のランナー同士が、充分な距離を維持できるため、ランナーの生育が良好となり、しかも、センチピート芝種子を転換用雑草芝地に全面播種する必要性が無いため、播種用種子に要する費用を削減できる。 It is preferable to provide a weed residue section B between the sowing section A and the sowing section A, and alternately provide the sowing section A and the weed rest section B. By doing this, runners of centipeat turf germinated and grown in the sowing area can be maintained at a sufficient distance, so that the runners grow well, and the centipede turf seeds are completely sown in the weed turf for conversion. Therefore, it is possible to reduce the cost required for seeds for sowing.
播種区Ａと雑草残置区Ｂとの面積比は、２〜５：１の範囲が好ましく、３〜５：１の範囲とすることがより好ましい。雑草残置区Ｂに対して、２倍以上の面積の播種区Ａを設けることにより、雑草芝地からセンチピート芝地への転換を数年で達成することができる。また、雑草残置区Ｂに対する播種区Ａの面積比を５倍以下とすることにより、播種時のコスト、即ち種子に掛かる費用及び播種に要する経費を削減することができる。ちなみに、播種区Ａと雑草残置区Ｂの比が２：１の場合には約３３％の播種量の削減となる。 The area ratio between the sowing zone A and the weed residue zone B is preferably in the range of 2-5: 1, and more preferably in the range of 3-5: 1. By providing the sowing section A having an area more than twice that of the weed residue section B, conversion from weed turf to centipeat turf can be achieved in several years. Moreover, by setting the area ratio of the sowing section A to the weed residue section B to be 5 times or less, it is possible to reduce costs at the time of sowing, that is, costs for seeds and costs for sowing. Incidentally, when the ratio of the sowing section A and the weed residue section B is 2: 1, the sowing amount is reduced by about 33%.
センチピート芝は暖地型牧草で、強光性であるため南方向に多くのランナーを伸張し、南東から南西に当たる範囲に最も伸張する性質がある。この性質を利用して、図１の例に示すように、播種区Ａをジグザグパターンに形成し、ジグザグパターンの凸状部もしくは孤状部を、南側に設けることが好ましい。こうすることで、播種区Ａで生育したセンチピート芝のランナーが、冬季にチガヤ、野芝、高麗芝の地上部が枯死することに伴い、それらの枯死堆積物の表面上を放射状に匍匐し繁殖することが容易になる。また、雑草残置区Ｂが滞水している場合であっても、センチピート芝のランナーは、滞水に近づかずに水に触れない高さで伸長をコントロールするので、滞水の影響を受け難くすることができる。 Centipeet turf is a warm-season pasture, and since it is highly luminescent, it has the property of extending many runners in the south direction and extending most from the southeast to the southwest. Utilizing this property, as shown in the example of FIG. 1, it is preferable to form the sowing section A in a zigzag pattern and to provide the convex or isolated portion of the zigzag pattern on the south side. By doing this, the runners of centipede turf grown in the sowing area A radiate the surface of those dead deposits in the winter, as the ground parts of Chigaya, Noshiba, and Goryeoushi die. It becomes easy to breed. Even if weed remnant section B is stagnant, centipede turf runners control the extension at a height that does not approach the water and do not touch the water. Can be difficult.
本発明の方法により、３年から７年で対象地（既存の雑草芝地）すべてがセンチピート芝で植被され、センチピート芝へ効率よく転換することが可能になる。 By the method of the present invention, all the target land (existing weed turf grass) is planted with centipeat turf in 3 to 7 years, and it becomes possible to efficiently convert to centipeat turf.
以下、本発明を実施例および比較例を用いて具体的に説明するが、本発明は以下の実施例にのみ限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated concretely using an Example and a comparative example, this invention is not limited only to a following example.
（実施例１）
北西から南東向きで造成された矩形の雑草芝地に、図２に示す方向で、耕耘条件を変えた各５ｍ四方の４つの試験区を用意した。各試験区の間隔は３ｍとした。耕耘地の作製には耕耘機を用い、各１回〜２回耕耘した。各試験区とも、７月上旬に、センチピート芝の種子を１５×２５＝３７５ｇ（１５ｇ／ｍ２）播種した（種子１ｇは約１３００粒）。
Example 1
In the rectangular weed turf developed from northwest to southeast, four test areas of 5 m square each with different tillage conditions were prepared in the direction shown in FIG. The interval between each test section was 3 m. For the production of the cultivated land, the cultivator was used and cultivated once or twice each. In each test group, 15 × 25 = 375 g (15 g / m 2 ) seeds of centipeat turf were sown in early July (1 g of seed was about 1300 grains).
その後、約３年間に亘り、種子の発芽状況（発芽勢、成立数、伸長値）及び芝の生育状況（ランナーの方向、数量、伸長値）を試験した。なお、滞水区は草地のままとし、滞水処理は土壌の透水ポテンシャルに任せた。 Thereafter, over the course of about 3 years, the germination status of seeds (germination vigor, number of establishments, elongation value) and turf growth status (runner direction, quantity, elongation value) were tested. The stagnation area was left as grassland, and the stagnation treatment was left to the permeability of the soil.
試験区１は、雑草残置区を十字路型とした。試験区の四隅を耕耘して雑草を鋤き込み播種区とし、雑草残置区を未耕耘地とした。播種は夏季１回のみ実施した。 In Test Zone 1, the weed residue zone was a cross road type. The four corners of the test plot were cultivated, and weeds were sown into a sowing plot, and the weed residue plot was set as an uncultivated plot. Sowing was conducted only once in summer.
試験区２は、雑草残置区が無く、試験区全体を未耕耘播種区とした。７月上旬及び９月上旬の２回に分けて各７．５ｇ／ｍ２を播種した。播種前には雑草刈り込みを行い、これを計２回実施した。 In test plot 2, there was no weed residue plot, and the entire test plot was defined as an uncultivated seeding plot. 7.5 g / m 2 of each was sown in two portions in early July and early September. Prior to sowing, weed trimming was performed twice.
試験区３は、雑草残置区が無く、試験区全体を耕耘して雑草を２回鋤き込み、播種区とした。播種は夏季１回のみ実施した。 In test group 3, there was no weed residue group, and the entire test group was cultivated and weeds were sown twice to make a sowing group. Sowing was conducted only once in summer.
試験区４は、雑草残置区を中央矩形型とした。中央部に未処理の雑草残置区を残し、周囲を耕耘して雑草を鋤き込み播種区とした。播種は夏季１回のみ実施した。 In the test plot 4, the weed residue plot was a central rectangular shape. The untreated weed residue area was left in the center, and the surrounding area was cultivated to weed the weeds into a sowing area. Sowing was conducted only once in summer.
試験期間中における、種子の発芽状況（発芽勢、成立数、伸長値）及び芝の生育状況（ランナーの方向、数量、伸長値）を、まとめて表１に示す。 Table 1 collectively shows the germination status of seeds (germination vigor, number of establishments, elongation value) and turf growth status (runner direction, quantity, elongation value) during the test period.
表１の結果より、以下のことがわかった。 From the results in Table 1, the following was found.
発芽したセンチピート芝の試験区に占める面積割合（占有率）は、試験区４を除き、ほぼ同じ数値領域（８０％〜１００％）にあった。試験区１と試験区２では、伸長したセンチピート芝が試験区の外にはみ出し、植被率が１００％を超える結果となった。 The area ratio (occupancy ratio) of the germinated centipeat turf in the test section was in substantially the same numerical range (80% to 100%) except for the test section 4. In Test Zone 1 and Test Zone 2, the extended centipeat turf protruded outside the test zone, and the vegetation coverage exceeded 100%.
また、センチピート芝種子の発芽率は、シャーレー試験及びプランター暴露試験により求めた（ともに、種子１００粒／ｍ２を播種）。シャーレー試験では平均発芽率約７０％を示し（カタログ値とほぼ同等）、暴露試験では平均発芽率４６％を示した。これらの試験結果より、平均発芽率を５８％と定めた。 In addition, the germination rate of centipeat turf seeds was determined by a petri dish test and a planter exposure test (both seeded with 100 seeds / m 2 ). The Petri test showed an average germination rate of about 70% (approximately the same as the catalog value), and the exposure test showed an average germination rate of 46%. From these test results, the average germination rate was determined to be 58%.
センチピート芝の成立数は、内径１０ｃｍ正方形型コドラートによる平均的成立部分にてカウントした値を示す。試験区１、試験区２は初期成立が良く、試験区３、試験区４はやや劣った。２回に分けて播種した試験区２は、成立数が最も高い値を示した。 The number of established centipeat turf indicates a value counted at an average established portion by a square type quadrat with an inner diameter of 10 cm. Test plot 1 and test plot 2 were well established in the initial stage, and test plot 3 and test plot 4 were slightly inferior. Test group 2 seeded in two batches showed the highest number of establishments.
また、芝の伸長度は、試験区４を除き、１３ｃｍ前後で落ち着いた。試験区４で伸長度が劣った理由は、中央部に残した未処理の雑草残置区の滞水によるものと推察される。雑草刈り込みのみを行い耕耘しなかった試験区２は、耕耘した試験区１と比べて、芝の伸長値では殆ど差が見られなかったが、ランナー（繁殖茎）の数量及び伸長値では劣っていたことより、ランナーの生育には、播種区をあらかじめ耕耘してチガヤを掘り起こしておくことが有効であることがわかった。 Further, the lawn elongation was settled at around 13 cm, except in the test section 4. The reason why the extension degree is inferior in the test section 4 is presumed to be due to the water remaining in the untreated weed residue section left in the center. The test area 2 that was only pruned with weeds and not plowed showed almost no difference in turf elongation values compared to the plowed test area 1, but was inferior in the number and extension values of runners (breeding stems). From this, it was found that it is effective for the growth of runners to cultivate the seedlings in advance by cultivating the seedlings.
ランナーの数量と伸長値は、単位面積当たりの播種量が多く、個体間の競争が激しくなる形態をもつ試験区１が、本数、伸長度（表１中の伸長値は最高値を示す）ともに著しく高い値を示した。この結果より、匍匐茎芝種であるセンチピート芝を全面播種することにより播種区での共存を目指すとともに、播種区と播種区の間にスペースを設けることで芝同士の競争が起き、ランナーが伸長することがわかった。 The number of runners and the elongation value are as follows. The test area 1 has a large seeding amount per unit area and competition between individuals is intense. Both the number and the elongation degree (the elongation value in Table 1 shows the maximum value). Remarkably high values were shown. From this result, we aim to coexist in the sowing zone by sowing the whole surface of the centipede turf, which is a stalk turf species, and by creating a space between the sowing zone and the sowing zone, competition between the turf occurs and the runners grow I found out that
また、各試験区とも、ランナーは、陽が陰る方向を避け、陽が射す方向を好む性質があり、東南から南西に当たる範囲に伸びているものが多く、ランナーは、北側に比べて南側に２〜４倍の数量で出茎しており、しかもこの方向には、北側に比べて２〜３倍の伸長度の長いランナーが伸びていた。この結果より、播種区の東南から南西方向にランナーを伸ばしやすいように播種区をジグザグパターンに、南側に頂点が来るように弧形もしくは凸型に設計し、しかも、ランナーが伸びる方向にはセンチピート芝種子を播種しなくても、匍匐茎種子のランナーの特性を利用してセンチピート芝を繁殖させることが可能であることがわかった。 In each test area, the runners avoid the direction of the sun and prefer the direction of the sun. Many runners extend from the southeast to the southwest, and the runners are 2 in the south compared to the north. The shoots were stalked in a quantity of ~ 4 times, and in this direction, runners with a degree of elongation that was 2-3 times longer than the north side were extended. From this result, the sowing area is designed in a zigzag pattern so that the runner can be easily extended from southeast to southwest of the sowing area, and the arc or convex shape is designed so that the apex is on the south side. It has been found that it is possible to breed centipeat turf by utilizing the characteristics of the stalk seed runner without seeding peat turf seed.
滞水の影響の大小は、センチピート芝の初期生育状態から評価した。即ち、滞水の影響は、播種区の間に雑草残置区を設けた試験区１、及び、雑草刈り込みのみを行い耕耘しなかった試験区２では、殆ど無かった。雑草を２回鋤き込み、全面播種を実施した試験区３では、滞水の影響が少し見られたが、腐植雑草の含水能が向上したことが原因と推察される。滞水の影響は、試験区４で顕著に見られたが、中央部に雑草残置区を残したことによる、試験区全体の排水機能喪失が原因と推察される。 The magnitude of the influence of the stagnant water was evaluated from the initial growth state of centipeat turf. That is, there was almost no influence of water retention in the test area 1 in which the weed residue area was provided between the sowing areas, and in the test area 2 in which only the weeds were cut and not plowed. In Test Zone 3 in which weeds were sown twice and the entire seeding was carried out, the effect of water retention was slightly observed, but it is presumed that the water content of humic weeds was improved. The effect of water stagnation was noticeable in the test area 4, but it is presumed to be caused by the loss of the drainage function of the entire test area due to leaving the weed residue area in the center.
また、各試験区において、雑草の進入調査、即ち、進入した雑草の種類と植被率を調査した。その結果、
試験区１では、雑草残置区に２年間矮化雑草が確認された。
試験区２では、雑草の再生が初年度に２０％前後確認され、その後消滅した。
試験区３では、雑草の再生が初年度に５０％前後確認され、その後消滅した。
試験区４では、雑草が進入したが、進入した雑草は、メカルガヤが主たるものであり、その他にセイタカアワダチソウが確認された。
上記の結果から、雑草を鋤き込むことにより、雑草の再生を５０％程度阻止することがわかった。
In each test area, weed investigation of weeds, that is, the type of weeds that entered and the vegetation coverage rate was investigated. as a result,
In Test Zone 1, hatched weeds were confirmed in the weed residue zone for 2 years.
In Test Zone 2, weed regeneration was confirmed around 20% in the first year, and then disappeared.
In Test Zone 3, weed regeneration was confirmed around 50% in the first year, and then disappeared.
In Test Zone 4, weeds entered, but the weeds that entered mainly consisted of Mekargaya, and the other species were found.
From the above results, it was found that by weeding in weeds, weed regeneration was inhibited by about 50%.
（実施例２）
実施例１と同様、北西から南東向きで造成された矩形の雑草芝地に、雑草残置区の幅を３０ｃｍに設定した試験区を用意し、耕耘して雑草を鋤き込んだ播種区に、７月上旬に、センチピート芝の種子を１５ｇ／ｍ２播種した。
(Example 2)
In the same manner as in Example 1, in a rectangular weed turf developed from northwest to southeast, a test plot in which the width of the weed remnant was set to 30 cm was prepared, and the sowing plot into which the weed was planted by plowing, In early July, seeds of centipeat turf were sown at 15 g / m 2 .
１年後、最長のランナーは雑草残置区を渡り別の播種区に到達していた。また、試験区画の角部分の茎は最も伸長度が高く３４ｃｍであった。 One year later, the longest runner crossed the weed remnant and reached another sowing area. The stem at the corner of the test section had the highest elongation and was 34 cm.
実施例１、２の結果から、耕耘した播種区と播種区の間を雑草残置区とすることで、センチピート芝同士の競争を促しランナーを伸長させ匍匐茎を這わせ、茎の節から出す短い根を表土に定着させることにより、センチピート芝を繁殖させられることがわかった。また、実験結果からは明らかでないが、伸長したランナーによるアレロパシー効果も相俟って、チガヤ、野芝、高麗芝等の雑草及び従来芝が死滅したのではないかと推察する。 From the results of Examples 1 and 2, by setting a weed residue between the cultivated sowing zone and the sowing zone, the competition between centipeat turf is promoted, the runners are stretched and the stems are raised, and the stems are shortly taken out. It was found that centipeat lawn can be propagated by rooting the topsoil. Moreover, although not clear from the experimental results, it is inferred that weeds such as chigaya, wild turf, Korean turf, etc. and conventional turf were killed due to the allelopathic effect of the extended runners.
更に、耕耘機を用いて耕耘地をジグザグパターンに形成する場合、ジグザグパターンの幅は、耕耘機が入る幅（０．６ｍ〜１．２ｍ）に設定することが望ましく、また、耕耘地のジグザグパターンの頂点間距離を５．０〜８．０ｍ程度に設定することにより、作業効率が向上するとの知見を得た。また、実施例１の試験区１では、東南から南西方向に伸びるランナーの伸長値は最大で８１ｃｍ、最小でも１３ｃｍであること、並びに、実施例２の試験結果より、３０ｃｍ程度の雑草残置区があってもランナーが伸び得ること、及び、空間方向にランナーが伸びやすいことを考慮すると、雑草残置区の幅を０．３ｍ〜０．６ｍ幅としても、ランナーによる繁殖が可能であることがわかった。 Furthermore, when the cultivated land is formed in a zigzag pattern using a cultivator, it is desirable that the width of the zigzag pattern is set to a width (0.6 m to 1.2 m) into which the cultivator enters, and the zigzag of the cultivated land. The knowledge that working efficiency improves by setting the distance between the vertices of a pattern to about 5.0-8.0 m was acquired. Moreover, in the test zone 1 of Example 1, the extension value of the runner extending from southeast to southwest is a maximum of 81 cm, and the minimum is 13 cm. From the test results of Example 2, a weed residue area of about 30 cm is found. Considering that the runner can be extended even if it is, and that the runner is easy to extend in the spatial direction, it can be seen that breeding by the runner is possible even if the width of the weed remaining area is 0.3 m to 0.6 m. It was.
本発明に係るセンチピート芝への転換方法を採用すれば、芝生の転換工事が不要であるだけでなく、播種初年度は年２回程度の草刈り作業を要するが、次年度からは年１回〜２回程度、３年度からは年１回程度の草刈り作業で、芝生の維持管理をすることができる。したがって、変電所や発電所の敷地、道路の法面などに適用することにより、転換時初期費用及び維持管理費用を削減することができるので、その実用的価値は大である。 If the conversion method to centipeat lawn according to the present invention is adopted, not only lawn conversion work is unnecessary, but grass cutting work is required twice a year in the first year of sowing, but once a year from the next year. Up to about twice, and from FY3, the lawn can be maintained by mowing once a year. Therefore, by applying it to substations, power plant sites, road slopes, etc., the initial cost at the time of conversion and the maintenance cost can be reduced, so its practical value is great.
Ａ 播種区
Ｂ 雑草残置区
１ 試験区１
２ 試験区２
３ 試験区３
４ 試験区４
A Sowing Zone B Weed Remaining Zone 1 Test Zone 1
2 Test Zone 2
3 Test Zone 3
4 Test Zone 4
Claims (3)
3. The method for converting to centipeat lawn according to claim 1 or 2, wherein the sowing section is embanked.
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