JP2002262671A - Pot for plant cultivation - Google Patents
Pot for plant cultivationInfo
- Publication number
- JP2002262671A JP2002262671A JP2001069638A JP2001069638A JP2002262671A JP 2002262671 A JP2002262671 A JP 2002262671A JP 2001069638 A JP2001069638 A JP 2001069638A JP 2001069638 A JP2001069638 A JP 2001069638A JP 2002262671 A JP2002262671 A JP 2002262671A
- Authority
- JP
- Japan
- Prior art keywords
- pot
- waste
- charcoal
- cellulosic material
- wood
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、主として育苗と、
その後に移植を伴う栽培形態に最適な植物栽培用ポット
に関する。TECHNICAL FIELD The present invention relates mainly to raising seedlings,
The present invention relates to a pot for plant cultivation that is optimal for a cultivation mode involving transplantation.
【0002】[0002]
【従来の技術】育苗とその後に移植を伴う栽培形態で使
用される植物栽培用ポットの従来品は、比較的薄い軟質
の合成樹脂の有底筒状のもので、高さ約10cm、上部開口
径が8cm程度のものが多く用いられてきた。合成樹脂と
しては、ポリ塩化ビニル、ポリエチレン、ポリプロピレ
ン、ポリスチレン等の樹脂に無機質充填剤として炭酸カ
ルシウム、水酸化アルミ等を添加したものを成形してい
る。この植物栽培用ポットの従来品が有する機能として
は、育苗時の乾燥防止と、根から光を遮断すること、移
植時に植物の根元の掘削や根切りを必要とせず、根を傷
めないこと、更に、搬送時等における用土の落下防止等
にあった。2. Description of the Related Art A conventional pot for plant cultivation, which is used in a cultivation form involving seedling raising and subsequent transplantation, is a relatively thin, soft synthetic resin bottomed cylinder having a height of about 10 cm and an open top. Those having a diameter of about 8 cm have been frequently used. As the synthetic resin, a resin obtained by adding calcium carbonate, aluminum hydroxide, or the like as an inorganic filler to a resin such as polyvinyl chloride, polyethylene, polypropylene, or polystyrene is molded. The functions of the conventional pot for plant cultivation include the prevention of drying at the time of raising seedlings, the shielding of light from the roots, the need for excavation and root cutting of the root of the plant at the time of transplantation, and the prevention of damage to the roots, In addition, the present invention is to prevent the soil from dropping during transportation.
【0003】しかし、従来の植物栽培用ポットは合成樹
脂特有の耐久性の良さが却って欠点となり、移植後に取
り除かれたものが、田、畑、栽培ハウス、畦、作業場等
にゴミとなって、放置される結果となっている。これを
解決するために、光又は微生物によって分解するタイプ
のものも提案されている (例えば特開2000-209953号,特
開2000-83485号,実用新案登録3061568号,実用新案登録3
009210号)。しかし、コスト高を招く結果となってい
る。一方、ダンボールその他の古紙や製紙屑、木材廃材
等のセルロース系素材の廃棄物が増加しており、再資源
化、すなわち、その有効利用が問題となっている。この
問題と植物栽培用ポットの分解性の問題を解決しようと
した例として、特開平09-205895号がある。しかし、こ
れは不織布を用いるもので、コスト高を招く点が難点で
ある。However, conventional pots for plant cultivation are rather disadvantageous in terms of the durability characteristic of synthetic resin, and what is removed after transplantation becomes garbage in fields, fields, cultivation houses, furrows, work places, and the like. The result is that it is left alone. In order to solve this, a type that is decomposed by light or microorganisms has also been proposed (for example, JP-A-2000-209953, JP-A-2000-83485, Utility Model Registration 3061568, Utility Model Registration 3
009210). However, this has resulted in high costs. On the other hand, waste of cellulosic materials such as cardboard and other waste paper, papermaking waste, and wood waste is increasing, and there is a problem of recycling, that is, its effective use. JP-A-09-205895 is an example of an attempt to solve this problem and the problem of degradability of a pot for plant cultivation. However, this method uses a nonwoven fabric, and is disadvantageous in that the cost is increased.
【0004】[0004]
【発明が解決しようとする課題】そこで、育苗期間中や
移植作業中は安定であるにもかかわらず、そのまま移植
して地中に放置しても分解可能であり、根が張るのを阻
害する等の植物の成長に悪影響がなく、しかも、セルロ
ース系素材の廃棄物処理が可能、かつ、低コストの植物
栽培用ポットについて検討した。この目的を同じくする
ものに、実用新案登録3009210号の古紙を用いた植木用
具の例もみられるが、本発明者は更に、植物栽培用ポッ
ト自体が植物の成長に積極的に関与し、好影響を与える
ように検討した。Therefore, although it is stable during the seedling raising period and during the transplanting operation, it can be decomposed even if it is transplanted as it is and left in the ground, which inhibits rooting. We studied low-cost pots for plant cultivation that do not adversely affect the growth of plants, such as those, and that allow waste treatment of cellulosic materials. For the same purpose, there is also an example of a planting tool using waste paper of Utility Model Registration No. 3009210, but the present inventor further found that the plant growing pot itself was positively involved in plant growth, Considered to give.
【0005】[0005]
【課題を解決するための手段】上記課題を検討した結
果、セルロース系素材に炭を混在させ、成形してなる植
物栽培用ポットとした。また、セルロース系素材と炭に
バインダーを配合し、栽培容器形状とし、更に、ポット
本体に木酢又は竹酢を含有させることとした。As a result of studying the above problems, a pot for plant cultivation was formed by mixing and molding charcoal with a cellulosic material. In addition, a binder is mixed with the cellulosic material and charcoal to form a cultivation container, and the pot body further contains wood vinegar or bamboo vinegar.
【0006】ここにいうセルロース系素材とは、紙、木
材、竹材等に由来する故紙(製紙屑や古紙)や、木材廃
材、間伐材、製材屑、その他植物使用の加工屑等であ
り、粉体又は繊維状(紙の解繊加工物)に加工して用い
る。特に古紙の使用が安価かつ廃棄物処理上好ましい。
これらのセルロース系素材が1種又は2種以上の混合で
用いられる。古紙、古段ボール紙、古雑誌等に由来する
再生パルプ等が使用可能であり、これらを単独に、ある
いは2種以上併せて用いる。これらのパルプ等の原料
を、適当な方法で解繊処理を行うとよい。原料を解繊状
態や粉体にできる方法であれば、どの様な方法、設備、
装置を用いても差し支えない。The term "cellulosic material" as used herein refers to waste paper (papermaking waste or waste paper) derived from paper, wood, bamboo, etc., wood waste, thinned wood, sawmill, or other processing waste used in plants. It is processed into a body or fibrous form (defibrated paper). In particular, the use of waste paper is inexpensive and preferable for waste disposal.
These cellulosic materials are used alone or in combination of two or more. Recycled pulp derived from waste paper, old corrugated paperboard, old magazines and the like can be used, and these can be used alone or in combination of two or more. These pulp and other raw materials may be defibrated by an appropriate method. What method, equipment,
The device can be used.
【0007】炭は竹炭、木炭、籾殻炭、活性炭等の中か
ら選ばれる1種又は2種以上の混合が好ましい。数mm以
下の粒状や粉体としてセルロース系素材中に配合され
る。炭がポット本体中に存在することによって、炭が持
つ無数の気孔(多孔質)や、それに微生物が繁殖して、微
生物の発する酸素等の土中含有率が増加し、植物の成長
に寄与する。炭はセルロース系素材に対して5〜25%加
えるとよい。The charcoal is preferably one or a mixture of two or more selected from bamboo charcoal, charcoal, rice husk charcoal, activated carbon and the like. It is blended in the cellulosic material as particles or powder of several mm or less. By the presence of charcoal in the pot body, the countless pores (porous) of the charcoal and the microorganisms that propagate in it increase the soil content of oxygen and the like emitted by the microorganisms, contributing to plant growth . Charcoal is preferably added in an amount of 5 to 25% based on the cellulosic material.
【0008】バインダーは、土中で崩壊可能なものがよ
く、生分解、加水分解等によって崩壊するものが好まし
い。そのような分解性樹脂としては、土中でバクテリア
等により分解する、澱粉、カルボキシメチルセルロー
ス、アルギン酸ソーダ、カゼイン、エチレン酢酸ビニル
変性澱粉重合物、ポリビニルアルコール、ラクトン樹脂
等が挙げられる。バインダーによって解繊状態や粉体の
セルロース系素材の成形後のポット本体の保形性が良好
となるし、配合する竹炭、木炭、籾殻炭、活性炭等のポ
ット本体からの離脱防止の役目をする。バインダーはセ
ルロース系素材に対して5〜15%加えるとよい。通気
性、保水性に優れたポットが得られる。The binder is preferably one that can be disintegrated in soil, and preferably one that disintegrates by biodegradation, hydrolysis, or the like. Examples of such a degradable resin include starch, carboxymethylcellulose, sodium alginate, casein, ethylene vinyl acetate modified starch polymer, polyvinyl alcohol, lactone resin, etc., which are decomposed by bacteria or the like in soil. The binder improves the shape in the defibrated state and the pot body after molding of the powdered cellulosic material, and serves to prevent bamboo charcoal, charcoal, rice husk charcoal, activated carbon, etc. from being detached from the pot body. . The binder is preferably added in an amount of 5 to 15% based on the cellulosic material. A pot excellent in breathability and water retention can be obtained.
【0009】本発明における栽培容器の形状としては、
有底筒状、無底筒状、方形角形等の鉢形のもの総てを含
むが、特に有底筒状の丸形開口のもので、高さ約10cm程
度、上部開口径が8cm程度、角形開口のもので、高さ約
5〜8cm程度、上部開口径が約5〜8cm程度のいわゆる
使い捨てポットと称されるものに最適である。これらは
複数個が連結されたものを切り離して使用するタイプと
してもよい。成形には離型剤を加えるとよいが、離型剤
としてはステアリン酸もしくはラウリン酸の金属塩であ
って、カルシウム,マグネシウム,亜鉛,アルミニウ
ム,ストロンチウムの群から選ばれた金属塩を用いるこ
とができる。[0009] The shape of the cultivation container in the present invention is as follows.
Includes all pots such as bottomed cylinders, bottomless cylinders, square prisms, etc., especially those with a bottomed cylindrical round opening, about 10 cm in height, about 8 cm in upper opening diameter, square It has an opening and is most suitable for a so-called disposable pot having a height of about 5 to 8 cm and an upper opening diameter of about 5 to 8 cm. These may be of a type in which a plurality of connected parts are separated and used. It is advisable to add a mold release agent to the molding. As the mold release agent, a metal salt of stearic acid or lauric acid, and a metal salt selected from the group consisting of calcium, magnesium, zinc, aluminum and strontium may be used. it can.
【0010】ポット本体には木酢又は竹酢を含有させる
とよい。木酢又は竹酢は、木酢液又は竹酢液として木
炭、竹炭の製造時に得られる。本来強い殺菌作用を利用
しているが、水で200〜500倍に希釈して使用すると、殺
菌作用から逆に有用な微生物(EM菌)の繁殖環境促進作用
を有することが明らかとなっている。これは酢酸からア
セチル補酵素という物質が植物や微生物によって作ら
れ、植物や微生物に必要な成分へと変化するとの考えが
ある。木酢又は竹酢は、150〜800倍、好ましくは200〜5
00倍に希釈した液を成形前の原料段階で添加してもよい
が、前記のように希釈した液をポット本体内部に対し噴
霧するとよい。The pot body preferably contains wood vinegar or bamboo vinegar. Wood vinegar or bamboo vinegar is obtained as a wood vinegar or bamboo vinegar during the production of charcoal or bamboo charcoal. Originally uses a strong bactericidal action, but it is clarified that when used after being diluted 200-500 times with water, it has an effect of promoting the propagation environment of useful microorganisms (EM bacteria) from the bactericidal action . This is thought to be due to the fact that a substance called acetyl coenzyme is produced from acetic acid by plants and microorganisms and changes into components necessary for plants and microorganisms. Wood vinegar or bamboo vinegar is 150-800 times, preferably 200-5
The liquid diluted 100 times may be added at the raw material stage before molding, but the liquid diluted as described above may be sprayed on the inside of the pot body.
【0011】[0011]
【発明の実施の形態】以下実施例によって本発明を更に
詳細に説明する。 実施例1 粉砕ダンボール古紙70部、竹炭粉末10部、澱粉10部の混
合物100部に対し、水500部を添加した配合物をほぼ均一
となるように混練した後成形した。成形は、この成形材
料を固定側金型および可動側金型のパーティング面を密
着させた状態のキャビティ内に充填して120℃から220℃
に加熱して行った。キャビティ内は成形体の高さ約10c
m、上部円形開口径が8cm、厚み1.5〜2mmに相当するよ
う作成した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the following examples. Example 1 A mixture of 70 parts of crushed cardboard waste paper, 100 parts of bamboo charcoal powder, and 100 parts of a mixture of 10 parts of starch and 500 parts of water was kneaded so as to be almost uniform, followed by molding. For molding, this molding material is filled into a cavity with the parting surfaces of the fixed mold and the movable mold in close contact with each other, and the temperature is from 120 ° C to 220 ° C.
And heated. The height of the molded body is about 10c in the cavity
m, the upper circular opening diameter was 8 cm, and the thickness was 1.5 to 2 mm.
【0012】脱型後のポットの様子を図1に示す。この
底に水抜き穴のあるコップ状のポット1には紙繊維主体
のポット本体2の壁面に炭3が散在している。このポッ
ト1内に用土を上部開口縁部よりやや盛り上がる程度に
入れ、水をかけ、やや乾いたところで、ミニトマトの種
を撒いた。比較のために竹炭粉末を配合しないで他は同
じ原料による同様に成形されたポットを使用して同様に
ミニトマトの種を撒いた。発芽は5日後で同じであった
が、成長するにつれて本発明のポットを使用した方が苗
の生長が早く、かつ勢いが良かった。1ヶ月後に圃場へ
移植し、3ヶ月後に実ったミニトマトの数と大きさを比
較したが、本発明のポットを使用した方が実ったミニト
マトの数も多いし、全体に大きかった。FIG. 1 shows the state of the pot after the mold release. In a cup-shaped pot 1 having a drain hole at the bottom, charcoal 3 is scattered on the wall surface of a pot body 2 mainly made of paper fiber. The soil was put into the pot 1 to such an extent as to slightly rise from the edge of the upper opening, and water was applied thereto. For comparison, mini-tomato seeds were similarly sown using a similarly shaped pot made of the same raw materials without blending bamboo charcoal powder. Germination was the same after 5 days, but the seedlings grew faster and more vigorously when the pots of the present invention were used as they grew. One month after transplanting to the field and comparing the number and size of the mini tomatoes that grew three months later, the number of mini tomatoes that grew using the pot of the present invention was larger and larger overall.
【0013】実施例2 古紙由来の解繊状態の紙繊維:木炭:ポリビニルアルコ
ール:水との割合を、7:1.5:1:4とし、これの
合計量100部に対してステアリン酸亜鉛を1部添加した
ものを成形材料とし、固定側金型と可動側金型との温度
を190℃にして成形した。成形のための型は、複数個が
連結されたものを切り離して使用するタイプのポットが
得られるキャビティを有している。Example 2 A ratio of defibrated paper fiber derived from waste paper: charcoal: polyvinyl alcohol: water was 7: 1.5: 1: 4, and zinc stearate was added to 100 parts of the total amount. Was used as a molding material, and the temperature of the fixed-side mold and the movable-side mold was set to 190 ° C. for molding. The mold for molding has a cavity in which a pot of a type in which a plurality of connected molds are separated and used is obtained.
【0014】得られたポット連結体4の様子を図2に示
す。薄肉で、軽量で、高剛性、反りがなく、収縮もない
特性を有している。単体に分離すれば方形に開口したポ
ット1となる。土中では細菌の作用により2〜3週間で
生分解されて崩壊するという特徴も有している。壁面に
散在している炭3の多孔質が植物の成長に好影響を与え
るのである。ポット本体が崩壊後にも継続して炭3が水
分の吸脱着を繰り返しながら植物に好影響を与え続ける
のである。FIG. 2 shows the state of the obtained pot connector 4. Thin, lightweight, high rigidity, no warpage, no shrinkage. When the pot 1 is separated into a single unit, the pot 1 is opened in a square shape. It also has the characteristic that it is biodegraded and disintegrated in soil in 2-3 weeks by the action of bacteria. The porosity of the charcoal 3 scattered on the wall has a favorable effect on plant growth. Even after the pot body collapses, the charcoal 3 continues to exert a favorable effect on the plant while repeatedly absorbing and desorbing moisture.
【0015】このポット1の内壁へ竹炭製造過程で得ら
れた竹酢の300倍希釈水を噴霧処理した。しばらく放置
して乾いた頃、このポット1内に用土を上部開口縁部よ
りやや盛り上がる程度に入れ、水をかけた。用土表面が
やや乾いたところで、レタスの種を撒いた。比較のため
に木炭粉末を配合しないで他は同じ原料による同様に成
形されたポットと、竹酢の300倍希釈水の噴霧処理をし
ない本実施例と同じ構造のポットを使用して同様にレタ
スの種を撒いた。発芽は6日後で同じであったが、成長
するにつれて本実施例のポットを使用したものが最も苗
の生長が早く、次に、竹酢処理しないポットを使用した
もの、最も遅れたのが木炭を有しないポット使用の例で
あった。20日後に圃場へ移植し、2ヶ月後にレタスの成
長を観察したが、本実施例のポットを使用したものが最
も大きかった。次に、竹酢処理しないポットを使用した
もの、最も小さいのが木炭を有しないポット使用の例で
あった。The inner wall of the pot 1 was sprayed with a 300-fold dilution of bamboo vinegar obtained in the bamboo charcoal production process. When the pot 1 was left to dry for a while, the soil was poured into the pot 1 so as to slightly rise from the edge of the upper opening, and water was applied. When the soil surface was a little dry, lettuce seeds were sown. For comparison, lettuce was similarly formed using a pot formed in the same manner using the same raw material without blending charcoal powder, and a pot having the same structure as that of the present example without spraying 300 times dilution water of bamboo vinegar. Seeds. Germination was the same after 6 days, but as the plants grew, those using the pot of this example grew the fastest in the seedlings, and those using the pot without bamboo vinegar treatment, and the charcoal was the slowest. This was an example of using a pot having no. The plant was transplanted to the field 20 days later, and the growth of lettuce was observed 2 months later. The one using the pot of this example was the largest. Next, an example using a pot without bamboo vinegar treatment, and the smallest one was an example using a pot without charcoal.
【0016】[0016]
【発明の効果】本発明の植物栽培用ポットは、地上での
育苗期間中や移植作業中は安定であるにもかかわらず、
そのまま移植して地中に放置すると分解し崩壊可能であ
る。生分解性のバインダー使用とセルロース系素材の使
用により地中ではポット本体が分解してしまうので根が
張るのを阻害する等の植物の成長に悪影響がない。しか
も、セルロース系素材の廃棄物処理が可能で、原材料が
安価であり、低コストの植物栽培用ポットの提供を可能
とした。植物栽培用ポット自体が炭を有する壁面を持つ
ので植物の成長に積極的に関与し、好影響を与える。加
えて、木酢又は竹酢を少量ポット本体に含ませたものは
更に植物の成長に好影響を与えるものとなっている。The pot for plant cultivation of the present invention is stable during the seedling period on the ground and during the transplanting operation,
If it is transplanted as it is and left in the ground, it can decompose and collapse. The use of a biodegradable binder and the use of a cellulosic material degrade the pot body in the ground, so there is no adverse effect on plant growth such as inhibiting rooting. In addition, it is possible to provide a pot for plant cultivation that can process waste materials of cellulosic materials, is inexpensive in raw materials, and low in cost. Since the pot for plant cultivation itself has a wall surface having charcoal, it actively participates in the growth of the plant and has a favorable effect. In addition, those in which a small amount of wood vinegar or bamboo vinegar is contained in the pot body have a further favorable effect on plant growth.
【図1】本発明の実施例の植物栽培用ポットの斜視図で
ある。FIG. 1 is a perspective view of a pot for plant cultivation according to an embodiment of the present invention.
【図2】他の実施例の植物栽培用ポットの斜視図であ
る。FIG. 2 is a perspective view of a pot for plant cultivation according to another embodiment.
1 ポット 2 ポット本体 3 炭 4 ポット連結体 1 pot 2 pot body 3 charcoal 4 pot connected body
Claims (4)
してなる植物栽培用ポット。1. A plant cultivation pot formed by mixing charcoal with a cellulosic material and molding.
配合され、栽培容器形状に成形してなる植物栽培用ポッ
ト。2. A plant cultivation pot formed by blending a charcoal and a binder with a cellulosic material and forming it into a cultivation container.
配合され、栽培容器形状としたポット本体に木酢又は竹
酢を含有させた植物栽培用ポット。3. A plant cultivation pot in which charcoal and a binder are blended with a cellulosic material, and wood vinegar or bamboo vinegar is contained in a pot body having a cultivation container shape.
材、間伐材、製材屑、その他植物加工屑の中から選ばれ
る1種又は2種以上の混合であって、炭が竹炭、木炭、
籾殻炭、活性炭の中から選ばれる1種又は2種以上の混
合である請求項1ないし3のいずれか記載の植物栽培用
ポット。4. The cellulosic material is one or a mixture of two or more selected from waste paper, paper waste, wood waste, thinned wood, sawdust, and other plant waste, and the charcoal is bamboo charcoal, charcoal,
The pot for plant cultivation according to any one of claims 1 to 3, wherein the pot is one or a mixture of two or more selected from rice husk charcoal and activated carbon.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001069638A JP2002262671A (en) | 2001-03-13 | 2001-03-13 | Pot for plant cultivation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001069638A JP2002262671A (en) | 2001-03-13 | 2001-03-13 | Pot for plant cultivation |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2002262671A true JP2002262671A (en) | 2002-09-17 |
Family
ID=18927649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001069638A Pending JP2002262671A (en) | 2001-03-13 | 2001-03-13 | Pot for plant cultivation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2002262671A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004045270A1 (en) * | 2002-11-18 | 2004-06-03 | Toshiyuki Aiba | Raising pots for root crop seedlings |
WO2004045271A1 (en) * | 2002-11-18 | 2004-06-03 | Toshiyuki Aiba | Raising pots for vegetable seedlings |
JP2006291472A (en) * | 2005-04-06 | 2006-10-26 | Kankyo Shizai Kk | Spacer for slope planting |
JP2008022831A (en) * | 2006-07-25 | 2008-02-07 | Takehiko Oki | Plant packaging material |
KR20220021690A (en) | 2020-08-14 | 2022-02-22 | 김민서 | Biodegradable pots for seedlings using animal bones and spent mushroom growth medium and its manufacturing method |
-
2001
- 2001-03-13 JP JP2001069638A patent/JP2002262671A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004045270A1 (en) * | 2002-11-18 | 2004-06-03 | Toshiyuki Aiba | Raising pots for root crop seedlings |
WO2004045271A1 (en) * | 2002-11-18 | 2004-06-03 | Toshiyuki Aiba | Raising pots for vegetable seedlings |
US7234272B2 (en) * | 2002-11-18 | 2007-06-26 | Toshiyuki Aiba | Raising pots for vegetable seedlings |
US7234273B2 (en) * | 2002-11-18 | 2007-06-26 | Toshiyuki Aiba | Pots for raising root crop seedlings |
JP2006291472A (en) * | 2005-04-06 | 2006-10-26 | Kankyo Shizai Kk | Spacer for slope planting |
JP2008022831A (en) * | 2006-07-25 | 2008-02-07 | Takehiko Oki | Plant packaging material |
KR20220021690A (en) | 2020-08-14 | 2022-02-22 | 김민서 | Biodegradable pots for seedlings using animal bones and spent mushroom growth medium and its manufacturing method |
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