JPH08277191A - Slow-release granular rertilizer and its production - Google Patents
Slow-release granular rertilizer and its productionInfo
- Publication number
- JPH08277191A JPH08277191A JP7104579A JP10457995A JPH08277191A JP H08277191 A JPH08277191 A JP H08277191A JP 7104579 A JP7104579 A JP 7104579A JP 10457995 A JP10457995 A JP 10457995A JP H08277191 A JPH08277191 A JP H08277191A
- Authority
- JP
- Japan
- Prior art keywords
- water
- soluble polymer
- slow
- insolubilized
- fertilizer
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は一般に農業、林業、水産
業あるいは園芸等に利用される肥料に関するものであ
り、詳しくは長期間にわたり有効成分が緩やかに放出さ
れる緩効性粒状肥料及びその製造方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a fertilizer used in agriculture, forestry, fisheries, horticulture, etc., and more specifically, a slow-release granular fertilizer in which the active ingredient is slowly released over a long period of time and its The present invention relates to a manufacturing method.
【０００２】[0002]
【従来の技術】農業、林業、水産業あるいは園芸等に利
用される肥料は堆肥、鶏糞等の有機肥料、及び、化学的
に製造される、アンモニア、燐酸、硝酸カリ等を配合し
た化学肥料等が一般的に使用されている。近代の大規模
農業等においては、施肥の簡便性、有効成分の高濃度等
の為、化学肥料が一般的に用いられてきた。Fertilizers used in agriculture, forestry, fisheries, horticulture, etc. are organic fertilizers such as compost and chicken manure, and chemically manufactured chemical fertilizers containing ammonia, phosphoric acid, potassium nitrate, etc. Is commonly used. In modern large-scale agriculture and the like, chemical fertilizers have been generally used because of the ease of fertilization and the high concentration of active ingredients.
【０００３】一方、これらの化学肥料は有効成分が高濃
度である反面、水中、及び／又は、土中への有効成分の
溶出速度が調節されておらず、短時間に有効成分が溶出
し、植物に吸収されない成分の系外への流出があり、過
剰の肥料を施肥する必要がある。又、施肥回数を増やさ
なければならない等の問題点があった。又、これらの過
剰の有効成分は田畑以外の周辺環境に流出し、地下水の
汚染、赤潮等の富栄養による環境破壊が問題となってい
る。これらの問題を解決するために、長期間にわたり有
効成分が緩やかに放出される緩効性肥料が提案されてい
る。On the other hand, although these chemical fertilizers have a high concentration of the active ingredient, the elution rate of the active ingredient in water and / or soil is not controlled, and the active ingredient is eluted in a short time. There is an outflow of components that are not absorbed by plants, and it is necessary to apply excess fertilizer. There is also a problem that the number of times of fertilization must be increased. In addition, these excess active ingredients flow out to the surrounding environment other than the fields, and there is a problem of environmental damage due to groundwater pollution and eutrophication such as red tide. In order to solve these problems, slow-release fertilizers in which the active ingredient is released slowly over a long period of time have been proposed.
【０００４】具体的な例としては、例えば、ジイソブチ
リデン尿素のように、土中にて加水分解をうけて始めて
水に有効成分が溶解するように設計された緩効性肥料、
又は、通常製造される肥料粒子の表面を高分子化合物等
の皮膜で覆い、有効成分の溶解を抑制するように設計さ
れた被覆肥料等が市販されている。しかし、前記のタイ
プでは有効成分以外の高価な助剤、高価な製造方法が必
要等の問題点があり、又、後記のタイプではポリマー皮
膜をコーティングする際、一般には有機媒体を必要と
し、製造時の火災や爆発等の危険性、有機媒体の蒸気の
環境への散逸による環境への問題等もあり、十分満足の
いく方法は提案されていなかった。As a specific example, for example, diisobutylidene urea, a slow-release fertilizer designed to dissolve an active ingredient in water only after being hydrolyzed in soil,
Alternatively, coated fertilizers and the like designed to cover the surface of fertilizer particles usually produced with a film of a polymer compound or the like to suppress dissolution of the active ingredient are commercially available. However, the above-mentioned types have problems such as expensive auxiliaries other than the active ingredient and an expensive production method, and the types described below generally require an organic medium when coating a polymer film, Since there is a risk of fire and explosion at the time, and environmental problems due to the dissipation of organic medium vapor into the environment, a sufficiently satisfactory method has not been proposed.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、前記
の背景に鑑み、従来知られていた方法等では完全に満足
できなかったものを、新規な材料設計概念を導入するこ
とにより上記問題点を解決させようとするものである。In view of the above background, the object of the present invention is to solve the above-mentioned problems by introducing a novel material design concept which has not been completely satisfied by the conventionally known methods and the like. It tries to solve the point.
【０００６】[0006]
【課題を解決するための手段】このような課題を解決す
るために種々検討を重ねた結果、水不溶化した水溶性ポ
リマーを用いることにより目的を達成することができる
ことを見出し、本発明を完成した。即ち、本発明の要旨
は、水不溶化した水溶性ポリマーにより表面被覆され
た、又は該水不溶化した水溶性ポリマーを含有すること
を特徴とする緩効性粒状肥料及びその製造方法にある。As a result of various studies to solve such problems, it was found that the object can be achieved by using a water-insoluble water-soluble polymer, and the present invention was completed. . That is, the gist of the present invention is a slow-release granular fertilizer characterized by being surface-coated with a water-insolubilized water-soluble polymer or containing the water-insolubilized water-soluble polymer, and a method for producing the same.
【０００７】以下に本発明の内容につき詳細に説明す
る。なお、以後、文中の％はすべて重量％を意味する。
本発明で使用される肥料は、特に限定されない。尿素、
硫安、塩安、塩化加里、硫酸加里、燐酸アンモニア等の
粒状の単肥の他に、Ｎ，Ｋ2 Ｏ，Ｐ2 Ｏ5 等の多成分を
含む粒状の肥料が本発明品の原肥に使用される。肥料の
粒径、形状は特に限定されないが、一般に１〜４ｍｍの
大きさの粒状のものが適用されるが、角張った形態や不
規則な形態のものより、球状または球状に近い形態の粒
子の方が好ましい。又、これらの粒子等を製造する際に
は、バインダー成分として、タルク、ケイソウ土、粘土
等の無機成分等を、又、上記成分の他、マグネシウム等
の微量金属肥料成分を添加することもできる。The contents of the present invention will be described in detail below. In the following, all% in the text mean% by weight.
The fertilizer used in the present invention is not particularly limited. urea,
In addition to granular simple fertilizers such as ammonium sulfate, ammonium chloride, potassium chloride, potassium sulfate, and ammonium phosphate, granular fertilizers containing multiple components such as N, K 2 O and P 2 O 5 are used as raw fertilizers of the present invention. used. The particle size and shape of the fertilizer are not particularly limited, but granular particles having a size of 1 to 4 mm are generally applied, but particles having a spherical shape or a shape close to a spherical shape are more preferable than those having an angular shape or an irregular shape. Is preferred. When producing these particles and the like, it is possible to add an inorganic component such as talc, diatomaceous earth, or clay as a binder component, or a trace amount metal fertilizer component such as magnesium in addition to the above components. .
【０００８】又、土質改良、有効成分の土中での保持の
ため、油粕、木粉等の有機性の成分を添加することもで
きる。本発明は、これら肥料粒子が表面を水不溶化した
水溶性のポリマーにより被覆され、又は該水不溶化した
水溶性ポリマーを含有することを特徴とするものである
が、その製造方法としては、これらの粒子の表面に水溶
性ポリマーを塗布し、又は肥料成分に水溶性ポリマーを
配合し、造粒するか、あるいは更に粒子表面に水溶性ポ
リマーを塗布し、後に水溶性ポリマーを水不溶化する方
法が採られる。In order to improve the soil quality and keep the active ingredient in the soil, organic ingredients such as oil cake and wood flour may be added. The present invention, these fertilizer particles are characterized in that the surface is coated with a water-insoluble water-soluble polymer, or containing the water-insolubilized water-soluble polymer, the production method thereof, these A method of applying a water-soluble polymer to the surface of the particles, or blending a water-soluble polymer into the fertilizer component and granulating, or further applying a water-soluble polymer to the surface of the particles and then making the water-soluble polymer insoluble in water is adopted. To be
【０００９】該水溶性ポリマーの具体例としてはポリビ
ニルアルコール、ポリアクリルアミド、ポリアクリル
酸、ポリメタアクリル酸、ポリビニルアミン、ポリビニ
ルピロリドン及び無水マレイン酸含有ポリマー等の水溶
性ポリマーをあげることができる。これらのポリマーは
単独でも、２種以上の混合物として用いることも可能で
これらの水溶性ポリマーは本発明の趣旨に反しない限り
上記の母体モノマーを含有する例えば、ビニルアルコー
ル−酢酸ビニル、ビニルアルコール−エチレン、無水マ
レイン酸−イソブチレン等の共重合体であり、水溶性で
あるポリマーも包含するものである。Specific examples of the water-soluble polymer include water-soluble polymers such as polyvinyl alcohol, polyacrylamide, polyacrylic acid, polymethacrylic acid, polyvinylamine, polyvinylpyrrolidone and maleic anhydride-containing polymers. These polymers may be used alone or as a mixture of two or more kinds, and these water-soluble polymers contain the above-mentioned base monomer unless it is against the gist of the present invention. For example, vinyl alcohol-vinyl acetate, vinyl alcohol- It is a copolymer of ethylene, maleic anhydride-isobutylene and the like, and also includes a water-soluble polymer.
【００１０】また、本発明における水溶性ポリマーは、
被覆する目的を損なわなければ、水溶性ポリマーに加え
て他の無機物や有機物を共存させて使用しても構わな
い。例えば、溶出性の調整やポリマーの増量等の目的
で、タルク、炭酸カルシウム、クレイ、ケイソウ土、シ
リカ、金属酸化物、イオウ等の無機質の他、界面活性
剤、ワックス等の有機物質を加えても構わない。Further, the water-soluble polymer in the present invention is
In addition to the water-soluble polymer, other inorganic substances or organic substances may coexist and be used as long as the purpose of coating is not impaired. For example, for the purpose of adjusting the dissolution property and increasing the amount of polymer, in addition to inorganic substances such as talc, calcium carbonate, clay, diatomaceous earth, silica, metal oxides, sulfur, etc., surfactants, organic substances such as waxes are added. I don't mind.
【００１１】水溶性ポリマーを肥料粒子表面に塗布する
方法としては例えば、水溶性ポリマーの水溶液を、例え
ば、スプレー塗布、短時間の浸漬等の方法により、塗布
することができる。又、含有させる場合には、上記肥料
成分を配合混合する際に、例えば、水溶性ポリマーの水
溶液をブレンド混合し、次いで造粒する等の方法により
含有させることができる。As a method of applying the water-soluble polymer to the surface of the fertilizer particles, for example, an aqueous solution of the water-soluble polymer can be applied by a method such as spray application or short-time immersion. When it is contained, it can be contained by a method such as blending and mixing an aqueous solution of a water-soluble polymer and then granulating when the fertilizer components are mixed and mixed.
【００１２】スプレー塗布の場合工業的に適している装
置としては、一般的なヘンシェルミキサーやナウターミ
キサーの他に、回転ドラム式コーター（特開昭５２−６
１２１６号公報参照）、回転パン式コーター（特開平５
−８５８７３号公報参照）、回転落下式コーター（特願
平５−１３９３７６、５−１８５６１２、５−３４２５
２７各号公報参照）、振動流動装置（特開平１−２４５
８４７号公報参照）、ワースター型コーター、流動層型
コーター（特公平４−６１８４０号公報参照）などが挙
げられる。In the case of spray coating, as an industrially suitable apparatus, in addition to a general Henschel mixer or Nauter mixer, a rotary drum type coater (Japanese Patent Laid-Open No. 52-6)
No. 1216), a rotary pan type coater (Japanese Patent Laid-Open No. Hei 5)
-85873), rotary drop type coater (Japanese Patent Application Nos. 5-139376, 5-185612, 5-3425).
No. 27), a vibration flow device (Japanese Patent Laid-Open No. 1-245).
No. 847), a Wurster type coater, a fluidized bed type coater (see Japanese Examined Patent Publication No. 4-61840) and the like.
【００１３】水溶性ポリマーの濃度は、塗布方法により
適宜選択されるが、スプレー塗布する場合、具体的な例
を挙げるとポリマーとしてポリビニルアルコールを用い
た場合は０．１〜３０％、好ましくは、１〜１０％であ
る。水溶性ポリマーを水不溶化させる方法としては例え
ば、加熱による熱硬化、結晶化等により、又、水溶性ポ
リマーの水溶液等に架橋剤、架橋触媒等を配合してお
き、乾燥等の加熱時に熱架橋反応を起こさせることによ
り、又、表面を水不溶化させる場合には架橋反応を起こ
させる、架橋剤、架橋触媒等を水溶性ポリマーを塗布し
た後の粒子にガス状態にて、又は水溶液にしてスプレー
等の方法によ塗布膜中に拡散させ、前記と同様、乾燥等
の加熱時に熱架橋反応を起こさせること等により、実施
することができる。The concentration of the water-soluble polymer is appropriately selected depending on the coating method, but in the case of spray coating, a specific example is 0.1 to 30% when polyvinyl alcohol is used as the polymer, and preferably, It is 1 to 10%. Examples of the method for insolubilizing the water-soluble polymer in water include, for example, thermosetting by heating, crystallization, and the like, and a cross-linking agent, a cross-linking catalyst, and the like are mixed in an aqueous solution of the water-soluble polymer, and heat-cross-linked during heating such as drying. By inducing a reaction, or in the case of insolubilizing the surface with water, a cross-linking reaction is caused. Cross-linking agents, cross-linking catalysts, etc. are sprayed on the particles after coating the water-soluble polymer in a gas state or as an aqueous solution. It can be carried out by diffusing into the coating film by a method such as the above and causing a thermal crosslinking reaction at the time of heating such as drying as in the above.
【００１４】この水不溶化条件を適宜選択することによ
り、有効成分の放出する速度を調節することができるの
で、工業的には好ましい。架橋剤等の具体例としては、
２，２′−アゾビス（２−アミジノプロパン）二水塩、
２，２′−アゾビス〔２−（２−イミダゾリン−２−イ
ル）プロパン〕二水塩、４−ジアゾジフェニルアミン硫
酸塩とホルムアルデヒドとの重縮合物等のラジカル発生
剤、ホルムアルデヒド、アセトアルデヒド、ブチルアル
デヒド等のアルデヒド類、アセトン等のケトン類が挙げ
られる。It is industrially preferable that the release rate of the active ingredient can be controlled by appropriately selecting the water insolubilization conditions. Specific examples of the cross-linking agent, etc.,
2,2'-azobis (2-amidinopropane) dihydrate,
Radical generators such as 2,2'-azobis [2- (2-imidazolin-2-yl) propane] dihydrate, polycondensates of 4-diazodiphenylamine sulfate and formaldehyde, formaldehyde, acetaldehyde, butyraldehyde, etc. Aldehydes and ketones such as acetone.
【００１５】架橋触媒等の具体例としては、塩酸、硫
酸、アンモニア、ほう酸ナトリウム等の無機酸、アルカ
リ等が挙げられる。架橋剤、架橋触媒等は水溶性ポリマ
ーの水不溶化反応を考慮し、適宜、使用され、全く使用
しない場合もあるし、双方とも使用する場合もある。加
熱により水溶性ポリマーを水不溶化する場合、温度は通
常５０〜３００℃、好ましくは１００〜２５０℃であ
る。加熱時間は０．００１〜１０時間、好ましくは０．
０１〜１時間である。高温の場合は比較的短時間の加熱
で水不溶化するが、低温の場合は比較的長時間の加熱が
必要である。必要とする温度及び時間は、用いるポリマ
ーの種類で異なるので、適宜選択、決定される。加熱装
置は通常の乾燥器、もしくは前記のスプレー塗布装置が
そのまま使用できる。Specific examples of the crosslinking catalyst include hydrochloric acid, sulfuric acid, ammonia, inorganic acids such as sodium borate, and alkali. The cross-linking agent, the cross-linking catalyst, and the like are appropriately used in consideration of the water-insolubilizing reaction of the water-soluble polymer, may not be used at all, or may be used both. When the water-soluble polymer is insolubilized by heating, the temperature is usually 50 to 300 ° C, preferably 100 to 250 ° C. The heating time is 0.001 to 10 hours, preferably 0.
It is from 01 to 1 hour. When the temperature is high, it becomes insoluble in water by heating for a relatively short time, but when it is low, heating for a relatively long time is required. The required temperature and time differ depending on the type of polymer used, and are appropriately selected and determined. As the heating device, an ordinary dryer or the above spray coating device can be used as it is.
【００１６】架橋剤、架橋触媒の添加量は、通常水溶性
ポリマーに対して０．００１〜１０％、好ましくは０．
１〜２％の範囲である。ホルムアルデヒド等の架橋剤に
ついては、水溶性ポリマーに対して１〜９０％、好まし
くは１０〜５０％である。本方法では緩効性肥料粒子の
製造時に種々問題のある有機媒体等を使用することなく
安価に緩効性肥料粒子が製造でき好ましい。又、水不溶
化条件を選択すれば、有効成分の放出速度も調節でき好
ましい。The amount of the cross-linking agent and the cross-linking catalyst added is usually 0.001 to 10% with respect to the water-soluble polymer, preferably 0.1.
It is in the range of 1 to 2%. The cross-linking agent such as formaldehyde is 1 to 90%, preferably 10 to 50% with respect to the water-soluble polymer. This method is preferable because the slow-release fertilizer particles can be produced inexpensively without using an organic medium having various problems during the production of the slow-release fertilizer particles. Further, it is preferable to select water-insolubilization conditions because the release rate of the active ingredient can be adjusted.
【００１７】[0017]
【実施例】次に具体例を挙げて本発明をさらに詳しく説
明するが、本発明はその要旨を越えないかぎりは実施例
によりなんら制限を受けないことは言うまでもない。 実施例１ 常法に従い、燐酸アンモニウム、塩化カリ、尿素、ケイ
ソウ土を原料にし、有効成分が窒素、燐、カリ各８％、
平均粒径約３ｍｍの球状の肥料粒子を製造した。この肥
料粒子にポリビニルアルコール（和光純薬（株）社製、
重量平均分子量：８８，０００）の４％水溶液をスプレ
ー塗布した。EXAMPLES Next, the present invention will be described in more detail with reference to specific examples, but it goes without saying that the present invention is not limited to the examples unless the gist thereof is exceeded. Example 1 According to a conventional method, ammonium phosphate, potassium chloride, urea, and diatomaceous earth were used as raw materials, and the active ingredients were 8% each of nitrogen, phosphorus, and potassium.
Spherical fertilizer particles with an average particle size of about 3 mm were produced. Polyvinyl alcohol (manufactured by Wako Pure Chemical Industries, Ltd.,
A 4% aqueous solution having a weight average molecular weight of 88,000 was applied by spraying.
【００１８】塗布方法の詳細は次の通り。 塗布溶液：ポリビニルアルコール ４％溶液 液温 ２５℃ 塗布量 ２０ｋｇ／肥料粒子 ８ｋｇ ＜装置及び条件＞ 装置：回転通気コーティング装置（大川原製作所製ＳＲ
ＴＡ２−型） 回転数 １９ｒｐｍ 乾燥条件：乾燥ガス流量 ３３５ｍ3 ／ｈ（１２０
℃）、温度 １２０℃ 風向き；塗布溶液の噴霧方向に対して逆方向 塗布溶液噴霧速度：４００ｇ／ｍｉｎ 塗布時品温：６０℃（回転、噴霧中の肥料粒子に直接温
度センサーを挿入して測定した）The details of the coating method are as follows. Coating solution: polyvinyl alcohol 4% solution, liquid temperature 25 ° C, coating amount 20 kg / fertilizer particles 8 kg <apparatus and conditions> Equipment: rotary ventilation coating equipment (SR from Okawara Seisakusho)
TA2-type) Rotation speed 19 rpm Drying condition: Dry gas flow rate 335 m 3 / h (120
℃), temperature 120 ℃ wind direction; opposite direction to spray direction of coating solution Spray speed of coating solution: 400 g / min Product temperature during coating: 60 ° C (rotation, measured by inserting temperature sensor directly into fertilizer particles during spraying) did)
【００１９】塗布終了後、乾燥ガスの温度を上げ、品温
を９０℃にして５分、さらに品温を２００℃にして５分
間加熱して、水不溶化処理を行なった。この粒子１０ｇ
を２００ｍｌの水に入れ、２５℃の恒温器中で変化を調
べた。その結果、２４時間後も粒子はすべて原形状を保
っており、水中への有効成分の溶出率は５％以下であっ
た。その後、有効成分の溶出率は、７日目で１０％、１
４日目で２５％、４９日目で８０％であった。After completion of coating, the temperature of the dry gas was raised to 90 ° C. for 5 minutes, and then 200 ° C. for 5 minutes to carry out water insolubilization treatment. 10g of this particle
Was placed in 200 ml of water, and the change was examined in a thermostat at 25 ° C. As a result, all particles kept their original shape after 24 hours, and the elution rate of the active ingredient into water was 5% or less. After that, the elution rate of the active ingredient was 10% on the 7th day, 1
It was 25% on the 4th day and 80% on the 49th day.
【００２０】比較例１ 実施例１においてポリビニルアルコールの塗布を省略し
た以外は同様にして肥料粒子を製造し、水への浸漬テス
トを行った。浸漬後は粒子はすべて崩壊し、原形状を保
っておらず、水中への有効成分の溶出率は９０％以上で
あった。Comparative Example 1 Fertilizer particles were produced in the same manner as in Example 1 except that the application of polyvinyl alcohol was omitted, and a dipping test in water was conducted. After the immersion, all the particles were disintegrated, the original shape was not maintained, and the elution rate of the active ingredient into water was 90% or more.
【００２１】参考例１ 実施例１においてポリビニルアルコールの塗布後の加熱
処理条件を、品温８０℃−２０分とした以外は同様にし
て肥料粒子を製造し、水への浸漬テストを行った。この
場合にはポリビニルアルコールは不溶化が十分に行われ
てなく、浸漬後は粒子はすべて崩壊し、原形状を保って
おらず、水中への有効成分の溶出率は９０％以上であっ
た。Reference Example 1 Fertilizer particles were produced in the same manner as in Example 1 except that the heat treatment condition after coating polyvinyl alcohol was a product temperature of 80 ° C. for 20 minutes, and an immersion test in water was conducted. In this case, polyvinyl alcohol was not sufficiently insolubilized, all particles disintegrated after immersion, and the original shape was not maintained, and the elution rate of the active ingredient in water was 90% or more.
【００２２】[0022]
【発明の効果】本発明によれば、高価な溶剤を使用せ
ず、製造時の火災や爆発の危険をともなうことなく、製
造環境の悪化の恐れなく、安価に緩効性粒状肥料を製造
することができる。According to the present invention, a slow-acting granular fertilizer can be produced at a low cost without using an expensive solvent, without risk of fire or explosion during production, without fear of deterioration of production environment. be able to.
Claims (9)
被覆された、又は水不溶化した水溶性ポリマーを含有す
ることを特徴とする緩効性粒状肥料。1. A slow-acting granular fertilizer characterized by containing a water-insoluble water-soluble polymer surface-coated with the water-insoluble water-soluble polymer.
ル、ポリアクリルアミド、ポリアクリル酸、ポリメタク
リル酸、ポリビニルアミン、ポリビニルピロリドン及び
無水マレイン酸含有ポリマーの中から選ばれた１種又は
２種以上である請求項１記載の緩効性粒状肥料。2. The water-soluble polymer is one or more selected from polyvinyl alcohol, polyacrylamide, polyacrylic acid, polymethacrylic acid, polyvinylamine, polyvinylpyrrolidone, and a maleic anhydride-containing polymer. The slow-release granular fertilizer according to 1.
し、後に前記水溶性ポリマーを水不溶化することを特徴
とする請求項１又は２記載の緩効性粒状肥料の製造方
法。3. The method for producing a slow-release granular fertilizer according to claim 1, wherein the water-soluble polymer is applied to the surface of fertilizer particles, and then the water-soluble polymer is insolubilized in water.
状化し、後に該水溶性ポリマーを水不溶化することを特
徴とする請求項１又は２記載の緩効性粒状肥料の製造方
法。4. The method for producing a slow-acting granular fertilizer according to claim 1, wherein the water-soluble polymer is mixed with a fertilizer component, granulated, and then the water-soluble polymer is water-insolubilized.
状化し、更に水溶性ポリマーを塗布し、後に該水溶性ポ
リマーを水不溶化することを特徴とする請求項１又は２
記載の緩効性粒状肥料の製造方法。5. The method according to claim 1, wherein the water-soluble polymer is blended with the fertilizer component, granulated, the water-soluble polymer is further applied, and the water-soluble polymer is then insolubilized in water.
A method for producing the slow-release granular fertilizer described.
求項３乃至５のいずれかに記載の緩効性粒状肥料の製造
方法。6. The method for producing a slow-release granular fertilizer according to claim 3, wherein the water-soluble polymer is used as an aqueous solution.
不溶化する請求項３乃至５のいずれかに記載の緩効性粒
状肥料の製造方法。7. The method for producing a slow-acting granular fertilizer according to claim 3, wherein the water-soluble polymer is heated to make it insoluble in water.
不溶化する請求項３乃至５のいずれかに記載の緩効性粒
状肥料の製造方法。8. The method for producing a slow-acting granular fertilizer according to claim 3, wherein the water-insoluble polymer is crosslinked to make it insoluble in water.
をスプレー法により行う請求項３又は５記載の緩効性粒
状肥料の製造方法。9. The method for producing a slow-acting granular fertilizer according to claim 3, wherein the water-soluble polymer is applied to the surface of fertilizer particles by a spray method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7104579A JPH08277191A (en) | 1995-04-06 | 1995-04-06 | Slow-release granular rertilizer and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7104579A JPH08277191A (en) | 1995-04-06 | 1995-04-06 | Slow-release granular rertilizer and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08277191A true JPH08277191A (en) | 1996-10-22 |
Family
ID=14384353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7104579A Pending JPH08277191A (en) | 1995-04-06 | 1995-04-06 | Slow-release granular rertilizer and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08277191A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1028019C2 (en) * | 2005-01-14 | 2006-07-17 | Holland Novochem B V | Free-flowing, mineral oil-free granulate particles of plant auxiliary agent comprises reaction product of plant auxiliary agent containing nitrogen, phosphorus and/or potassium and waste flow of natural material containing nitrogen compound |
| WO2015056918A1 (en) * | 2013-10-14 | 2015-04-23 | (주)포스텍글로벌 | Coated granular fertilizer prevented from drifting and floating in water and preparation method therefor |
| CN105037057A (en) * | 2015-06-25 | 2015-11-11 | 合肥工业大学 | Biodegradable double-coated slow-release fertilizer and preparation method thereof |
| CN112601730A (en) * | 2018-06-04 | 2021-04-02 | 珀塞尔农业科技有限公司 | Fertilizer coating method |
| WO2022211118A1 (en) | 2021-03-31 | 2022-10-06 | ジェイカムアグリ株式会社 | Fertiliser coating material, coated granular fertiliser, and method for producing same |
-
1995
- 1995-04-06 JP JP7104579A patent/JPH08277191A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1028019C2 (en) * | 2005-01-14 | 2006-07-17 | Holland Novochem B V | Free-flowing, mineral oil-free granulate particles of plant auxiliary agent comprises reaction product of plant auxiliary agent containing nitrogen, phosphorus and/or potassium and waste flow of natural material containing nitrogen compound |
| WO2015056918A1 (en) * | 2013-10-14 | 2015-04-23 | (주)포스텍글로벌 | Coated granular fertilizer prevented from drifting and floating in water and preparation method therefor |
| CN105636922A (en) * | 2013-10-14 | 2016-06-01 | 博思泰克全球株式会社 | Coated granular fertilizer prevented from drifting and floating in water and preparation method therefor |
| CN105037057A (en) * | 2015-06-25 | 2015-11-11 | 合肥工业大学 | Biodegradable double-coated slow-release fertilizer and preparation method thereof |
| CN112601730A (en) * | 2018-06-04 | 2021-04-02 | 珀塞尔农业科技有限公司 | Fertilizer coating method |
| EP3802463A1 (en) * | 2018-06-04 | 2021-04-14 | Pursell Agri-Tech, LLC | Fertilizer coating method |
| US11180429B2 (en) | 2018-06-04 | 2021-11-23 | Pursell Agri-Tech, LLC | Fertilizer coating method |
| WO2022211118A1 (en) | 2021-03-31 | 2022-10-06 | ジェイカムアグリ株式会社 | Fertiliser coating material, coated granular fertiliser, and method for producing same |
| KR20230165267A (en) | 2021-03-31 | 2023-12-05 | 제이캄 아그리 가부시끼가이샤 | Covering material for fertilizer, covered granular fertilizer and method for producing the same |
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