JP2012205556A - Greening method - Google Patents

Greening method Download PDF

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JP2012205556A
JP2012205556A JP2011074610A JP2011074610A JP2012205556A JP 2012205556 A JP2012205556 A JP 2012205556A JP 2011074610 A JP2011074610 A JP 2011074610A JP 2011074610 A JP2011074610 A JP 2011074610A JP 2012205556 A JP2012205556 A JP 2012205556A
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seeds
magnesia
dormancy
germination
weight
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Kosuke Wakasugi
晃介 若杉
Shigeji Kobori
茂次 小堀
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TOBU KAGAKU KK
National Agriculture and Food Research Organization
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TOBU KAGAKU KK
National Agriculture and Food Research Organization
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Abstract

PROBLEM TO BE SOLVED: To provide a method for effectively greening even with due considerations to the environment.SOLUTION: The greening method includes spraying materials, obtained by mixing dormancy-breaking seeds, a magnesia-based solidifier which exerts germination-inhibiting effect on non-dormancy-breaking seeds in nature, and soil, so that the dormancy-breaking seeds sprout and are covered selectively and precedingly.

Description

本発明は、農村地帯の水田畦畔や法面における維持管理に関して、除草作業を軽労化するための被覆植物(グランドカバープランツ)をマグネシア系固化剤によって埋土種子の発芽を抑制しながら、休眠打破した種を用いることで選択的に植生を制御し、より効果的に緑化する技術である。また、法面などの緑化に用いられる糊料として、マグネシア系固化剤とポリビニルアルコール(PVA)等の包水性ゲル化剤水溶液を用いることで、粘着性と保湿性に優れたゲル化し、環境への配慮をしながら施工性を向上させることができる。   The present invention relates to maintenance on the paddy shore and slopes in rural areas, while suppressing the germination of buried seeds with a magnesia-based solidifying agent for a covering plant (ground cover plants) for lightening the weeding work, It is a technology to selectively control vegetation by using seeds that have broken through dormancy, and to more effectively plant trees. In addition, by using a magnesia-based solidifying agent and an aqueous gelling agent aqueous solution such as polyvinyl alcohol (PVA) as a glue used for greening of slopes, etc., it gels with excellent adhesiveness and moisture retention, to the environment It is possible to improve the workability while considering the above.

雑草の生育を調節する方法は、わい化剤や除草剤などの散布が主流であり、草を生やさない方法としては、フイルムマルチ、コンクリート被覆、アスファルト被覆などの地表面の被覆方法が一般的である。また、法面の省力的な管理として、芝やチガヤなどの草丈の低い植物で被覆するグランドカバープランツがあり、法面に直接播種する方法や苗を定植する方法、植生ネットを用いた方法で行われている。
法面保護工においても、芝張り工、緑化棚工、植生ネット工、泥吹き工、種子入り布団籠工などがあげられ、これに複合する、工法として、フリーフレーム工、井桁ブロック工、ジオテキススタイルなどがあげられる。
The main method of controlling the growth of weeds is spraying with dwarfing agents and herbicides, and methods that do not allow grass to grow are generally ground surface coating methods such as film mulch, concrete coating, and asphalt coating. Is. In addition, as a labor-saving management of the slope, there are ground cover plants that are covered with plants with low plant height such as lawn and chigaya, and methods such as sowing directly on the slope, planting seedlings, and using a vegetation net. Has been done.
The slope protection works include turf work, greening shelf work, vegetation net work, mud blowing work, and futon work with seeds. The combined methods include free frame work, cross-beam work, geotextile work. Sstyle and so on.

農村地帯において水田畦畔や法面の緑化をする際、農耕地に与える影響を最小限にとどめる必要があり、使用する資材などについては環境に負荷を与えないものを使用しなければならない。また、その他の道路法面や堤防敷き、河川敷き、堤体敷き、鉄道敷きにおいても、周辺地への影響や降雨に伴う流出による河川や地下水への影響、景観などへの影響を考慮する必要がある。   It is necessary to minimize the impact on agricultural land when paddy fields and slopes are planted in rural areas, and materials that do not impact the environment must be used. In addition, other road slopes, levee layings, river layings, levee laying, and railroad laying should also take into account the impact on the surrounding area, the impact on rivers and groundwater due to runoff from rainfall, and the landscape. There is.

種子吹きつけに伴うゲルとは、ポリアクリル酸エステル、ポリ酢酸ビニル、エチレン酢酸ビニル(EVA)、ポリ塩化ビニル(PVC)、ポリビニルアルコール(PVA)などのポリマーとこれらの分解物、及びモノマーなどが用いられるが、天然物もしくは、天然物を化学修飾した化合物が好ましい。また、ネット類では、PET繊維、PVC、アクリル繊維などがあげられるが、これらの化学製品は、耐久性が良く、分解するまでには長期間を要し、ポリエチレンやPVCフィルムは、公害問題を引き起こしている。
天然繊維では、ジュートや綿、わら、パルプ、ピートモス、椰子などが用いられている。これらは植生が根付く間の仮設的な役割をもたせるために、ネットや短繊維として土やセメントに添加して用いられているが、可能な限り土に還元されることが好ましい。
Gels associated with seed spraying include polymers such as polyacrylate, polyvinyl acetate, ethylene vinyl acetate (EVA), polyvinyl chloride (PVC), and polyvinyl alcohol (PVA), their degradation products, and monomers. Although used, natural products or compounds obtained by chemically modifying natural products are preferred. Also, nets include PET fiber, PVC, acrylic fiber, etc., but these chemical products have good durability and take a long time to decompose, and polyethylene and PVC film have pollution problems. Is causing.
Among natural fibers, jute, cotton, straw, pulp, peat moss, and eggplant are used. In order to give a temporary role while the vegetation takes root, these are used as nets or short fibers added to the soil or cement, but are preferably reduced to the soil as much as possible.

近年、植物の生態解明が進行し、緑化に使用する種子の休眠打破法や発芽率改善法、生育促進法などの処理方法か確立されつつあり、用土や肥料と組み合わせて様々な工法が開発されている。しかし、それだけでは法面の埋土種子との生存競争に勝つことは難しく、目的としている植物の被覆は困難である。   In recent years, elucidation of the ecology of plants has progressed, and treatment methods such as the dormancy breaking method, germination rate improvement method, and growth promotion method for seeds used for greening have been established, and various methods have been developed in combination with soil and fertilizer. ing. However, it is difficult to win the survival competition with sloped buried seeds alone, and it is difficult to cover the target plant.

イネ科植物の休眠打破には湿度15%で45℃の加温による休眠打破と湿度15%で5℃の寒冷休眠打破法、及び1%過酸化水素水による5℃(12時間以上)の処理方法及び石灰窒素やチオシャン酸塩、過酸化カルシウム、過酸化アンモニウムなどが知られている。これらの作用は植物の種子の胚胞に作用してアブシジン酸(ABA)を低減することにより発芽させ、これらの方法は他の植物にも応用が可能である。   Breaking dormancy of gramineous plants by breaking dormancy by heating at 45 ° C at 15% humidity, cold dormancy breaking method by 5 ° C at 15% humidity, and treatment at 5 ° C (12 hours or longer) with 1% hydrogen peroxide Methods and lime nitrogen, thioshanates, calcium peroxide, ammonium peroxide and the like are known. These effects act on plant seed germinal vesicles to reduce abscisic acid (ABA), and these methods can be applied to other plants.

水田畦畔や法面、または自然環境や人間活動に影響を与える可能性のあるサイトでの緑化は、使用する資材や水質、景観などの面で配慮しなくてはならないが、天然資材のみでは十分な緑化は困難である。また、従来工法で用いられている固化剤や糊料の資材では、環境への影響をなくしたとは言い難い。   The greening of paddy fields, slopes, and sites that may affect the natural environment and human activities must be considered in terms of materials used, water quality, landscape, etc. Sufficient greening is difficult. Moreover, it is difficult to say that the effects of the solidifying agent and paste used in the conventional construction method have been eliminated.

本発明者らは、既に特許文献1にて、抑草マルチング組成物を提案した。
本発明は、かかる技術を更に応用し、従来にない、環境への影響の優れた緑化方法を提供するものである。
The present inventors have already proposed a herbicidal mulching composition in Patent Document 1.
The present invention further applies this technique and provides a greening method having an unprecedented impact on the environment.

特開2004−166627号公報JP 2004-166627 A

本発明は環境への負荷をより少なくしたマグネシア系固化剤と休眠打破した種子、及び糊料を用いて、埋土種子の発芽・生育を抑えながら目標の植生を発芽させることで、環境への配慮を行いながらも、効果的に緑化を行う方法を提供することを目的としている。   The present invention uses a magnesia-based solidifying agent and a dormant-breaking seed that have reduced the burden on the environment, and a paste to germinate target vegetation while suppressing germination / growth of buried seeds. The aim is to provide a method for effective greening while giving consideration.

本発明者らは、マグネシア系固化剤の研究開発により得られた知見により、マグネシア(MgO)と固化剤の生理現象に着目し、一般に自然界に存在する種子に対し、発芽抑制作用が起こることを見出した。また、一方でこれらが、休眠打破した種子に対しては、何ら生理作用が起こらないことを見出した。この原理を利用すると、法面などに埋土している種子の発芽を抑制することができ、休眠打破した種子は優先的に発芽し、先行して被覆することができる。
即ち本発明は、休眠打破種子と、自然界にある休眠打破していない種子に対して発芽抑制効果を発揮するマグネシア系固化剤及び用土を混合した資材を、法面や水田畦畔等の地表面に吹き付けることによって、休眠打破した種子を選択的に先行して発芽・被覆させることを特徴とする緑化方法、並びに資材が包水性ゲル化剤水溶液を更に混合したものである上記緑化方法である。
本発明において、資材中の休眠打破種子、マグネシア系固化剤、用土、包水性ゲル化剤水溶液の配合比率は特に制限されず、本発明所期の効果を発現する範囲で、作業性等を考慮して適宜定めることができる。
Based on the knowledge obtained through research and development of magnesia solidifying agents, the present inventors pay attention to the physiological phenomena of magnesia (MgO) and solidifying agents, and that germination suppression action generally occurs on seeds existing in nature. I found it. On the other hand, they found that no physiological action occurred on the seeds that broke through dormancy. By utilizing this principle, it is possible to suppress the germination of seeds buried in the slope, etc., and the seeds that have broken through dormancy germinate preferentially and can be covered in advance.
That is, the present invention provides a material mixed with a dormant-breaking seed and a magnesia-based solidifying agent and soil that exerts a germination-inhibiting effect on seeds that do not break dormancy in the natural world, such as a slope or a paddy field. It is a greening method characterized by selectively germinating and coating seeds that have broken through dormancy by spraying on the surface, and the above-mentioned greening method in which the material is further mixed with an aqueous gelling agent solution.
In the present invention, the mixing ratio of the dormancy-breaking seed, magnesia-based solidifying agent, soil, and water-containing gelling agent aqueous solution in the material is not particularly limited, and workability and the like are considered within the range in which the effect of the present invention is exhibited. And can be determined as appropriate.

マグネシア系固化剤とは、MgO含有量が35%〜85%の紛体に無水石膏5.0%以上を含み、マグネシアを固化させる反応性物質としてケイ酸カルシウム、塩基性炭酸カルシウム、炭酸マグネシウム、重炭酸塩、有機炭酸化合物、メタリン酸塩、ポリリン酸塩、硫酸アルミニウム、硫酸マグネシウムなどの1種類又は2種類以上から得られる水硬性物質を与えるものに、ポットライフを与えるオキシカルボン酸塩、ケトカルボン酸塩を添加した粉末度3000〜8000の紛体混合物である。   Magnesia-based solidifying agent includes calcium silicate, basic calcium carbonate, magnesium carbonate, bicarbonate as a reactive substance that contains anhydrous gypsum 5.0% or more in powder with 35% to 85% MgO content and solidifies magnesia , Oxycarboxylates and ketocarboxylates that give pot life to those that give hydraulic substances obtained from one or more of organic carbonates, metaphosphates, polyphosphates, aluminum sulfate, magnesium sulfate, etc. It is a powder mixture having an added fineness of 3000 to 8000.

緑化に伴う種子の水分状態に対する影響は大きく、特に固化剤と散布した際は顕著である。そこで、保湿目的に保湿性の高い様々物質が応用されており、水性ウレタンなどが以前から用いられている。これらの特徴は、水分を含むゲル状の物質となり、地表面に対する接着性と保湿性が発芽に適していたが、環境的には水性ウレタンの原料となるトリレンジイソシアネート(TDI)、ジフェニルメタンジイソジアネート(MDI)、ポリオキシプロピレングリコール(PPG)、ポリフェニレンオキサイド(PPO)などが生分解性などの点でも好ましくないとされている。   The effect on the moisture state of seeds due to greening is large, especially when sprayed with a solidifying agent. Therefore, various substances having high moisturizing properties have been applied for the purpose of moisturizing, and aqueous urethane has been used for some time. These characteristics are water-containing gel-like substances, and the adhesiveness and moisture retention to the ground surface were suitable for germination, but environmentally, tolylene diisocyanate (TDI) and diphenylmethane diisotope, which are raw materials for aqueous urethanes. Dianates (MDI), polyoxypropylene glycol (PPG), polyphenylene oxide (PPO) and the like are not preferable in terms of biodegradability.

本発明者らは、高分子凝集剤のポリビニルアルコール(PVA)水溶液がマグネシウム系固化剤と反応してゲル化することを見いだし、包水ゲルが耐水性を有することから、天然ゲルのアルギン酸マグネシウム及びカラーギナン、マンナン、寒天などよりも生分解性は劣るが、安価で耐候性が良い。PVA水溶液に休眠打破した種子を添加し、マグネシウム固化剤を加える方法で、ゲル化が緩慢で水溶液から高含水の包水ゲルが得られる点で、単にPVA水溶液を種子と吹き付ける方法よりも優れていることと、更に低アルカリ系固化剤の発芽抑制作用を利用することで、効果的に目標とする植生の発芽のみを優先させることができる。
本方法は、種子を含む泥吹き法にも応用が期待でき、土の粘性を法面などのズリ落ち防止に利用できるなど、加えて吹き付け土の保水性を高める工法としても利用することが可能である。
The present inventors have found that an aqueous polyvinyl alcohol (PVA) solution of a polymer flocculant reacts with a magnesium-based solidifying agent and gels, and since the encapsulated gel has water resistance, the natural gel magnesium alginate and Although biodegradability is inferior to color ginnan, mannan, agar, etc., it is cheap and has good weather resistance. Addition of seeds that have broken through dormancy to PVA aqueous solution and add magnesium solidifying agent is superior to the method of simply spraying PVA aqueous solution with seeds in that gelation is slow and high water content gel is obtained from aqueous solution. In addition, by using the germination inhibitory action of the low alkali-based solidifying agent, it is possible to prioritize only the germination of the target vegetation effectively.
This method can be expected to be applied to the mud-blowing method including seeds, and can be used as a method to increase the water retention of sprayed soil. It is.

包水性ゲル化剤とは、アニオン系、及びノニオン系、カチオン系高分子凝集剤であり、物質名はアミノアルキル(メタ)アクリレート4級塩重合体、ポリアミノメチルアクリルアミド、天然物としてキトサン酢酸塩、納豆キナーゼ、ポリアミノ酸塩、ポリ乳酸塩などと、アクリルアミド・アクリル酸ソーダ共重合体、アクリルアミドアクリル酸ソーダ/AMPS・共重合体、ポリアクリル酸ソーダ、ポリアクリルアミド、部分鹸化PVAなどの1種類又は2種類以上の混合物からなる水溶性物質であり、2価のマグネシウムイオンと結合する反応基としてカルボキシル基、アミノ基、水酸基などを構造内に2個以上有し、包水ゲルを生成して、土壌又は植物性繊維などの作土に保水性を与え、マグネシア系固化剤と包水性の硬化物を生成する物で、硫酸バンド又はポリ塩化アルミニウムによりゲル強さを増強する物質をいう。   Hydrophobic gelling agents are anionic, nonionic, and cationic polymer flocculants, and the substance name is aminoalkyl (meth) acrylate quaternary salt polymer, polyaminomethylacrylamide, natural product chitosan acetate, Nattokinase, polyamino acid salt, polylactate, etc. and one or two of acrylamide / sodium acrylate copolymer, acrylamide / sodium acrylate / AMPS / copolymer, polyacrylic acid soda, polyacrylamide, partially saponified PVA It is a water-soluble substance composed of a mixture of more than one kind, and has two or more carboxyl groups, amino groups, hydroxyl groups, etc. in the structure as reactive groups that bind to divalent magnesium ions, and produces a water-containing gel to produce soil. Or it is a product that gives water retention to soil such as vegetable fiber, and produces a magnesia-based solidifying agent and water-hardened cured product. Refers to a substance that enhances the gel strength of poly aluminum chloride.

本発明の緑化条件には、草地も含まれており、直接草地に目的とする植物を繁茂させることは困難であり、農耕地でも草の侵入を防止することは、極めて困難な課題であり、このような資材により、除草剤でない草地処理が必要であり、窒素肥料と石灰系肥料を兼ね備えた、防草作用が求められている。
また更に、緑化に使用する種子の休眠打破方法は、0.5%〜2.0%の過酸化水素水及び、石灰窒素粉末水懸濁液、過酸化カルシウムコート法や加熱法として、40℃〜45℃で湿度15〜20%で種子を処理する方法と冷熱法として、0.5℃〜−5℃で処理する方法が挙げられる。これらの休眠打破法は種子の構造や発芽の形態により選択する必要があり、発芽速度を速めるには、強く処理する必要があるが発芽率は低下する。また、この他の方法として硝酸塩、成長ホルモン、エチレンガスなどを用いることが出来る。
The greening conditions of the present invention include grassland, it is difficult to overgrow the target plant directly on the grassland, preventing the invasion of grass even in agricultural land is a very difficult problem, Such materials require grassland treatment that is not a herbicide, and a herbicidal action that combines nitrogen fertilizer and lime fertilizer is required.
Furthermore, the seed dormancy breaking method used for greening is 0.5% to 2.0% hydrogen peroxide water, lime nitrogen powder water suspension, calcium peroxide coating method or heating method at 40 ° C to 45 ° C. A method of treating seeds at a humidity of 15 to 20% and a method of cooling and heating include a method of treating at 0.5 to -5 ° C. These dormancy breaking methods need to be selected according to the structure of the seeds and the form of germination. In order to increase the germination rate, it is necessary to treat strongly, but the germination rate decreases. As other methods, nitrate, growth hormone, ethylene gas, and the like can be used.

本発明では、目標とする植物の緑化を図るため、対象となる種子を休眠打破することで先行して発芽させ、占有的な繁茂を図ると同時に、その他の植物はマグネシア系固化剤による発芽抑制によって制御する。さらに、資材を吹き付ける際に高分子凝集剤を混合させることでマグネシア系固化材と反応し、発芽環境や施工性に優れたゲル状となり、効果的に緑化を行うことを提案するとともに、農業における草取りを省力化することを目的としている。
なお、カルシウム系固化剤においても、休眠打破種子と高分子凝集剤を用いることで同様の効果が得られる。
In the present invention, in order to plan the greening of the target plant, germinating the target seeds by breaking the dormancy in advance, aiming to occupy exclusively, and at the same time other plants suppress germination by the magnesia-based solidifying agent Control by. Furthermore, by mixing the polymer flocculant when spraying the material, it reacts with the magnesia-based solidified material to form a gel with excellent germination environment and workability, and proposes effective greening in agriculture. The purpose is to save the weeding.
In the calcium-based solidifying agent, the same effect can be obtained by using a dormancy-breaking seed and a polymer flocculant.

実施例1
ケンタッキーグラス種子100重量部に1.0%過酸化水素水100重量部を加えて、5℃24時間冷蔵庫で処理する。2日間風乾した後、イセキ野菜用育苗土に播種して、10日間、湿度60%、25℃で管理する。7日後の発芽率は62%、10日後の発芽率は96%である。無処理種子では、同一条件で発芽試験を行うと、7日後の発芽率は34%、10日後の発芽率は、83%であった。
この処理種子5重量部、マグネシア系固化剤1(マグネシア86.1、セキス重炭酸ナトリウム、13.7、無水石膏4.62、無水クエン酸0.63)の混合物粉末3.0重量部、イセキ野菜用育苗土97重量部と水50重量部を厚さ50mmに敷きつめて、湿度60%、25℃で保育する。7日後の発芽率は、56%で、10日後の発芽率は、85%であった。
比較例1
無処理種子5重量部、マグネシア系固化剤1(マグネシア86.1、セキス重炭酸ナトリウム、13.7、無水石膏4.62、無水クエン酸0.63)の混合物粉末3.0重量部、イセキ野菜用育苗土97重量部と水50重量部を厚さ50mmに敷きつめて、湿度60%、25℃で保育する。7日後の発芽率は、2%で、10日後の発芽率は、3%であった。
実施例2
休眠打破種子5.0重量部、マグネシア系固化剤2(マグネシア30.0、高炉スラグ6.000ブレーン60.0、無水石膏5.0、無水クエン酸0.7)の混合物粉末3.0重量部、イセキ野菜用育苗土97重量部と水50重量部を厚さ50mmに敷きつめて、湿度60%、25℃で保育する。7日後の発芽率は56%で、10日後の発芽率は85%であった。
比較例2
無処理種子5.0重量部、マグネシア系固化剤2(マグネシア30.0、高炉スラグ6.000ブレーン60.0、無水石膏5.0、無水クエン酸0.7)の混合物粉末3.0重量部、イセキ野菜用育苗土97重量部と水50重量部を厚さ50mmに敷きつめて、湿度60%、25℃で保育する。7日後の発芽率は1.6%、10日後の発芽率は3.0であった。( )内はすべて重量部を指す。
実施例3
以下の表1は各種の雑草の種子を用いて、マグネシア系固化剤と休眠打破処理の有無による発芽試験の結果を示す。マグネシア系固化剤の発芽抑制効果、及びマグネシア系固化材と休眠打破種子の併用によって目的とする種子の発芽効果が確認された。
Example 1
100 parts by weight of 1.0% hydrogen peroxide solution is added to 100 parts by weight of Kentucky grass seeds and treated in a refrigerator at 5 ° C. for 24 hours. After air-drying for 2 days, it is sown on nursery soil for Iseki vegetables and managed for 10 days at 60% humidity and 25 ° C. The germination rate after 7 days is 62%, and the germination rate after 10 days is 96%. When untreated seeds were subjected to the germination test under the same conditions, the germination rate after 7 days was 34%, and the germination rate after 10 days was 83%.
5 parts by weight of this treated seed, 3.0 parts by weight of a mixed powder of magnesia-based solidifying agent 1 (magnesia 86.1, sesquibicarbonate, 13.7, anhydrous gypsum 4.62, anhydrous citric acid 0.63), iseki Spread 97 parts by weight of vegetable seedling soil and 50 parts by weight of water to a thickness of 50 mm, and raise them at a humidity of 60% and 25 ° C. The germination rate after 7 days was 56%, and the germination rate after 10 days was 85%.
Comparative Example 1
Untreated seed 5 parts by weight, magnesia-based solidifying agent 1 (magnesia 86.1, sesquibicarbonate, 13.7, anhydrous gypsum 4.62, anhydrous citric acid 0.63) mixed powder 3.0 parts by weight, ISEKI Spread 97 parts by weight of vegetable seedling soil and 50 parts by weight of water to a thickness of 50 mm, and raise them at a humidity of 60% and 25 ° C. The germination rate after 7 days was 2%, and the germination rate after 10 days was 3%.
Example 2
3.0 parts by weight of a mixture powder of 5.0 parts by weight of dormant breaking seeds and magnesia-based solidifying agent 2 (magnesia 30.0, blast furnace slag 6.000 brane 60.0, anhydrous gypsum 5.0, anhydrous citric acid 0.7) And 97 parts by weight of seedling soil for vegetables and 50 parts by weight of water are laid down in a thickness of 50 mm, and are grown at a humidity of 60% and 25 ° C. The germination rate after 7 days was 56%, and the germination rate after 10 days was 85%.
Comparative Example 2
Untreated seed 5.0 parts by weight, magnesia-based solidifying agent 2 (magnesia 30.0, blast furnace slag 6.000 brane 60.0, anhydrous gypsum 5.0, anhydrous citric acid 0.7) mixed powder 3.0 weight And 97 parts by weight of seedling soil for vegetables and 50 parts by weight of water are laid down in a thickness of 50 mm, and are grown at a humidity of 60% and 25 ° C. The germination rate after 7 days was 1.6%, and the germination rate after 10 days was 3.0. () Indicates all parts by weight.
Example 3
Table 1 below shows the results of a germination test using various kinds of weed seeds with and without magnesia-based solidifying agent and dormancy breaking treatment. The germination inhibitory effect of the magnesia-based solidifying agent and the germination effect of the target seed were confirmed by the combined use of the magnesia-based solidifying material and the dormancy-breaking seed.

Figure 2012205556
Figure 2012205556

実施例4
実施例2に挙げた、マグネシア系固化剤2の100重量部に対し、クラレPVA217E、15重量部を温水100重量部に溶解し、室温にしてから休眠打破したケンタッキーグラス種子30重量部を混合し、次いで、マグネシア系固化剤2を添加したスラリーを地表面に吹き付ける。ゲル化時間は8分で、種子を含んだゲルは土表面に良く接着した。
この生成したゲルの当初含水量は100であったが、3日後には、含水量70となり、10日後でも含水量は60で乾燥しにくいことが判明した。
ゲル中に含まれるケンタッキーグラス種子は、10日後には93%発芽し、降雨に対しても耐水性があり、傾斜度35の法面において剥がれもなく安定であった。
比較例4.
クラレPVA217E、15重量部を温水100重量部に溶解し、室温にしてから、休眠打破した、ケンタッキーグラス種子30重量部を混合し、傾斜度35の法面に吹き付ける。
実施例4と異なり、PVAはゲル化しないで、法面からずり落ちが起こり、降雨に耐水性がなかった。
実施例5
マグネシア系固化剤1の100重量部に対して、野菜用育苗培土(イセキ)1000重量部を混合し、これにアクリルアミド・アクリル酸ソーダ共重合体0.05重量部を水50重量部に溶解した溶液を加えて混合し、直ちに法面に泥吹き機を用いて吹き付ける。
10分後にはゲル化して、弾性体の用土層が形成される。この用土の7日後の含水量は76%で、アクリルアミド・アクリル酸ソーダ共重合体を添加していない用土の含水量47%に比べ、保水効果が高いことが確認された。なお、吹き付け用土の体積変化はなく、ひび割れも発生しなかった。
Example 4
Kuraray PVA217E (15 parts by weight) was dissolved in 100 parts by weight of hot water and 100 parts by weight of magnesia-based solidifying agent 2 listed in Example 2 and mixed with 30 parts by weight of Kentucky grass seeds that had been broken through sleep after being brought to room temperature. Then, the slurry to which the magnesia-based solidifying agent 2 is added is sprayed on the ground surface. The gelation time was 8 minutes, and the gel containing seeds adhered well to the soil surface.
The initial water content of the gel thus produced was 100, but after 3 days, the water content became 70, and it was found that the water content was 60 and it was difficult to dry even after 10 days.
The Kentucky grass seeds contained in the gel germinated 93% after 10 days, were water-resistant to rainfall, and were stable without peeling off on the slope with a slope of 35.
Comparative Example 4.
Kuraray PVA217E, 15 parts by weight, is dissolved in 100 parts by weight of warm water, brought to room temperature, mixed with 30 parts by weight of Kentucky grass seeds that have been dormant, and sprayed onto a slope with a slope of 35.
Unlike Example 4, PVA did not gel, slipped off from the slope, and was not water resistant to rainfall.
Example 5
To 100 parts by weight of magnesia-based solidifying agent 1, 1000 parts by weight of vegetable seedling cultivating soil (Iseki) was mixed, and 0.05 parts by weight of acrylamide / sodium acrylate copolymer was dissolved in 50 parts by weight of water. Add the solution, mix and immediately spray the slope with a mud blower.
Ten minutes later, it gels to form an elastic soil layer. The water content after 7 days of this soil was 76%, and it was confirmed that the water retention effect was higher than the water content of 47% of the soil to which no acrylamide / sodium acrylate copolymer was added. In addition, there was no volume change of the soil for spraying, and no cracks were generated.

農家の作業の約40%が雑草管理であり、抑草が可能となれば大幅な省力化が図れる。また、本発明の利用分野は農村の法面、畦畔の緑化以外にも、道路法面、堤防敷き、河川敷き、鉄道敷きやエロージョン防止対策などの分野にも応用が可能である。
特に法面は、水はけが良いため過乾燥状態になりやすく、土壌も不安定なため、植物の発芽、生育に大きな弊害となる。そのため、植物の発芽、生育には保水性を与えることが好ましく、包水ゲルの保湿性と併せて固化剤の固化性による、法面の安定性を要素として加えた本資材の性質が従来の法面資材にない特性を付与する。
About 40% of farmer's work is weed management. If weeding is possible, it will save a lot of labor. The field of application of the present invention can be applied to fields such as road slopes, levee layings, river layings, railway layings, and erosion prevention measures in addition to rural slopes and ridgeline greening.
In particular, the slope is easy to be overdried due to good drainage, and the soil is also unstable, which is a serious detrimental effect on the germination and growth of plants. Therefore, it is preferable to give water retention to the germination and growth of plants, and the nature of this material, which includes the stability of the slope as a factor due to the solidification property of the solidifying agent in addition to the moisture retention property of the water-filling gel, is the conventional property. Gives characteristics not found in slope materials.

Claims (2)

休眠打破種子と、自然界にある休眠打破していない種子に対して発芽抑制効果を発揮するマグネシア系固化剤及び用土を混合した資材を地表面に吹き付けることによって、休眠打破した種子を選択的に先行して発芽・被覆させることを特徴とする緑化方法。 By selectively spraying the dormancy-breaking seeds on the ground surface with a mixed material of magnesia-based solidifying agent and soil that exerts a germination-inhibiting effect on seeds that do not break dormancy in the natural world And then sprouting and covering. 資材が包水性ゲル化剤水溶液を更に混合したものである請求項1記載の緑化方法。 The greening method according to claim 1, wherein the material is further mixed with an aqueous gelling agent solution.
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