JPH07505B2 - Coated granular fertilizer consisting of degradable coating - Google Patents
Coated granular fertilizer consisting of degradable coatingInfo
- Publication number
- JPH07505B2 JPH07505B2 JP1283048A JP28304889A JPH07505B2 JP H07505 B2 JPH07505 B2 JP H07505B2 JP 1283048 A JP1283048 A JP 1283048A JP 28304889 A JP28304889 A JP 28304889A JP H07505 B2 JPH07505 B2 JP H07505B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- granular fertilizer
- coated
- fertilizer
- coating material
- 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.)
- Expired - Lifetime
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- Fertilizers (AREA)
- Biological Depolymerization Polymers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、分解性被膜で被覆された被覆粒状肥料に関す
る。更に詳しくは、ポリカプロラクトンを必須成分とす
る分解性被膜で被覆された被覆粒状肥料に関する。TECHNICAL FIELD The present invention relates to a coated granular fertilizer coated with a degradable coating. More specifically, it relates to a coated granular fertilizer coated with a degradable coating containing polycaprolactone as an essential component.
本発明の被覆粒状肥料の被膜は、土壌微生物により分解
され最終的に土壌中に残留しない。また該被膜中には、
被覆粒状肥料の溶出を調整するため種々の助剤又は薬剤
を添加できる。The coating of the coated granular fertilizer of the present invention is decomposed by soil microorganisms and finally does not remain in the soil. Also, in the coating,
Various auxiliaries or agents can be added to control the elution of the coated granular fertilizer.
従来、作物の生育に応じて肥効を発現させようとする目
的で、種々の肥効調節型の肥料が開発され、特に粒状肥
料の表面を被覆材で覆った被覆粒状肥料が多く開示さ
れ、市販されている。例えば、米国特許第3295950号明
細書、特公昭40−28927号公報、特公昭44−28457号公
報、英国特許第815829号明細書、特公昭37−15832号公
報、特公昭42−13681号公報等で種々の資材が提案され
ているが、いずれも肥料成分の溶出速度を調節すること
は困難であることが示されている。Conventionally, for the purpose of expressing a fertilizing effect according to the growth of crops, various fertilizer-controlled fertilizers have been developed, and in particular, many coated granular fertilizers in which the surface of a granular fertilizer is covered with a coating material are disclosed, It is commercially available. For example, U.S. Pat.No. 3,295,950, Japanese Patent Publication No. 40-28927, Japanese Patent Publication No. 44-28457, British Patent No. 815829, Japanese Patent Publication No. 37-15832, Japanese Patent Publication No. 42-13681, etc. Although various materials have been proposed in the above, it has been shown that it is difficult to control the elution rate of fertilizer components in any of them.
これらに対し、特公昭60−21952号公報、特公昭60−304
0号公報では、ポリオレフィンを主成分とした被膜材で
粒状肥料を被覆する際、粒状肥料に被膜材料の溶液を噴
霧すると同時に熱風流で乾燥することによる被膜方法を
示し、この技術の特徴として、溶出速度の調節可能なこ
とが示され実用に供されている。On the other hand, Japanese Examined Patent Publication No. 60-21952 and Japanese Examined Patent Publication No. 60-304
In No. 0 publication, when coating a granular fertilizer with a coating material containing polyolefin as a main component, a coating method by spraying a solution of the coating material on the granular fertilizer and simultaneously drying with a hot air stream is shown, and as a feature of this technique, It has been shown that the elution rate can be adjusted and has been put to practical use.
更に、特公昭60−3040号公報および特開昭55−1672号公
報では、タルク等の無機粉体やイオウをポリオレフィン
系樹脂等の被膜中に分散させることにより、溶出コント
ロール機能を維持し、併せて溶出後の残留被膜の崩壊や
分解が促進されることが示されている。Further, in JP-B-60-3040 and JP-A-55-1672, inorganic powder such as talc or sulfur is dispersed in a film such as a polyolefin resin to maintain the elution control function. It has been shown that the disintegration and decomposition of the residual film after elution are accelerated.
分解性被膜において、分解性とは、光や酸素、微生物に
よる分解であり、被覆粒状肥料においては、肥料成分溶
出後の被膜が分解されず長期にわたり土壌中に残留する
ことと、溶出速度の調節が困難であることが指摘されて
いる。従来から提案されている被覆粒状肥料では、被膜
は、崩壊・分解を起こさず、又崩壊しても分解はせず土
譲中に残留し、作物の生育、土壌環境や田畑周辺の用水
・河川等に公害を引き起こす危険がある。また、従来か
ら提案されている分解性被膜で被覆された被覆粒状肥料
は、肥料成分の溶出速度を調節することは困難であり、
肥効期間が天候・土壌等の環境に影響を受け易い。被膜
が分解性を有し、肥効期間が調節可能な被覆粒状肥料が
望まれる。In the degradable film, degradability is the decomposition by light, oxygen and microorganisms.In coated granular fertilizer, the film after elution of the fertilizer components remains in the soil for a long period of time and the elution rate is controlled. It has been pointed out that it is difficult. With the coated granular fertilizers that have been proposed in the past, the coating does not collapse / decompose, or does not decompose even if it collapses and remains in the soil, growing crops, soil environment, and water / river around the fields. There is a risk of causing pollution. Further, the coated granular fertilizer coated with a decomposable coating that has been conventionally proposed is difficult to control the elution rate of fertilizer components,
The fertilization period is easily affected by the environment such as weather and soil. A coated granular fertilizer having a degradable coating and an adjustable fertilization period is desired.
本発明者らは、被膜が分解性を有し、肥効期間が調節可
能な分解性被膜で被覆された粒状肥料を製造するため
に、被膜材の選定について検討を行い、本発明に至った
ものである。The present inventors have conducted a study on selection of a coating material in order to produce granular fertilizer coated with a degradable coating having a coating having degradability and an adjustable fertilization period, and arrived at the present invention. It is a thing.
すなわち、本発明は、粒状肥料の表面に、被膜材Ａとし
てポリカプロラクトンと、被膜材Ｂとしてオレフィン重
合物、オレフィンを含む共重合物、塩化ビニリデン重合
物、塩化ビニリデンを含む共重合物、ジエン系重合物、
ワックス類、石油樹脂、天然樹脂、油脂およびその変性
物から選ばれた１種または２種以上の物質との混合物を
被覆してなる分解性被膜からなる被覆粒状肥料である。That is, the present invention provides polycaprolactone as the coating material A, an olefin polymer as the coating material B, an olefin-containing copolymer, a vinylidene chloride polymer, a vinylidene chloride-containing copolymer, and a diene-based material on the surface of the granular fertilizer. Polymer,
A coated granular fertilizer comprising a degradable coating formed by coating a mixture of one or more substances selected from waxes, petroleum resins, natural resins, fats and oils and modified products thereof.
本発明の被覆粒状肥料は、上記被膜材からなる溶液を粒
状肥料に噴霧すると同時に、その位置に高速熱風流を当
てて瞬時に乾燥しつつ被覆することにより得られる被膜
が分解性を有し、肥効期間が調節可能な被覆粒状肥料で
ある。The coated granular fertilizer of the present invention has a decomposable coating obtained by simultaneously spraying a solution comprising the coating material onto the granular fertilizer, and applying a high-speed hot air stream to the position to dry the coating instantly. It is a coated granular fertilizer with adjustable fertilization period.
本発明では、さらに必要に応じて第３被膜材成分とし
て、例えば、溶出調整剤、フィラー等を均一に分散して
用いることができる。In the present invention, as the third coating material component, for example, an elution adjusting agent, a filler and the like can be used by being uniformly dispersed, if necessary.
本発明でいう被膜材Ａは、ポリカプロラクトンであり、
被覆材Ｂは、オレフィン重合物、オレフィンを含む共重
合物、塩化ビニリデン重合物、塩化ビニリデンを含む共
重合物、ジエン系重合物、ワックス類、石油樹脂、天然
樹脂、油脂およびその変性物から選ばれた１種または２
種以上の物質である。オレフィン重合物とは、ポリエチ
レン、ポリプロピレン、エチレン・プロピレン共重合
物、ポリブテン、ブテン・エチレン共重合物、ブテン・
プロピレン共重合物、ポリスチレン等であり、オレフィ
ンを含む共重合物とは、エチレン・酢酸ビニル共重合
物、エチレン・アクリル酸共重合物、エチレン・アクリ
ル酸エステル共重合物、エチレン・メタアクリル酸共重
合物、エチレン・メタアクリル酸エステル共重合物、エ
チレン・一酸化炭素共重合体、エチレン・酢酸ビニル・
一酸化炭素共重合体等であり、塩化ビニリデンを含む共
重合物とは、塩化ビニリデン・塩化ビニル系共重合物で
あり、ジエン系重合物とは、ブタジエン重合物、イソプ
レン重合物、クロロプレン重合物、ブタジエン・スチレ
ン共重合物、EPDM重合物、スチレン・イソプレン共重合
物等であり、ワックス類とは、密ロウ、木ロウ、パラフ
ィン等であり、天然樹脂とは、天然ゴム、ロジン等であ
り、油脂およびその変性物とは、硬化油、固形脂肪酸お
よび金属塩等である。The coating material A in the present invention is polycaprolactone,
The coating material B is selected from olefin polymers, olefin-containing copolymers, vinylidene chloride polymers, vinylidene chloride-containing copolymers, diene polymers, waxes, petroleum resins, natural resins, fats and oils and modified products thereof. 1 or 2
It is more than a substance. Olefin polymers include polyethylene, polypropylene, ethylene / propylene copolymers, polybutene, butene / ethylene copolymers, butene /
Propylene copolymers, polystyrene, etc., and copolymers containing olefins include ethylene / vinyl acetate copolymers, ethylene / acrylic acid copolymers, ethylene / acrylic acid ester copolymers, ethylene / methacrylic acid copolymers. Polymer, ethylene / methacrylic acid ester copolymer, ethylene / carbon monoxide copolymer, ethylene / vinyl acetate /
A carbon monoxide copolymer or the like, and a vinylidene chloride-containing copolymer is a vinylidene chloride / vinyl chloride copolymer, and a diene polymer is a butadiene polymer, an isoprene polymer, or a chloroprene polymer. , Butadiene / styrene copolymer, EPDM polymer, styrene / isoprene copolymer, etc., waxes are beeswax, wooden wax, paraffin, etc., and natural resins are natural rubber, rosin, etc. The fats and oils and their modified products are hardened oils, solid fatty acids, metal salts and the like.
本発明の被膜材の被覆粒状物に対する重量百分率、すな
わち、被覆率は２〜20％が好ましい範囲である。The weight percentage of the coating material of the present invention with respect to the coated particles, that is, the coating rate is preferably 2 to 20%.
また、被膜材Ａは被膜材全体の10〜90％（重量）を占
め、被膜Ｂは被膜材全体の10〜90％（重量）の範囲で用
いられる。なお、必要に応じて混合可能な第３被膜材成
分としては、溶出調整剤としての界面活性剤、不溶性フ
ィラーとしてのタルク、炭酸カルシウム、金属酸化物等
を用いることができる。これらの混合物は、均一に分散
することが必要であり、不均一であれば、一部の微粒子
が片寄って被膜材の連続相が損なわれ、被膜の効果が失
われる。Further, the coating material A occupies 10 to 90% (weight) of the entire coating material, and the coating material B is used in the range of 10 to 90% (weight) of the entire coating material. As the third coating material component that can be mixed if necessary, a surfactant as an elution adjusting agent, talc as an insoluble filler, calcium carbonate, a metal oxide or the like can be used. These mixtures need to be uniformly dispersed, and if they are non-uniform, some fine particles are offset and the continuous phase of the coating material is impaired, and the effect of the coating is lost.
本発明では、被膜材を塩素化炭化水素類等の溶剤に溶解
あるいは分散させた液を高温に保持し、粒状肥料に噴霧
状に添加すると同時に、その位置に高速熱風流を当て瞬
時に乾燥しつつ被覆することにより被覆粒状肥料が得ら
れる。In the present invention, a liquid obtained by dissolving or dispersing the coating material in a solvent such as chlorinated hydrocarbons is maintained at a high temperature and added in a spray form to the granular fertilizer, and at the same time, a high-speed hot air flow is applied to the position to dry it instantly. A coated granular fertilizer can be obtained by coating while coating.
以下、実施例により本発明を説明する。 Hereinafter, the present invention will be described with reference to examples.
実施例１〜９及び比較例 （１） 装置ならびに製造方法 第１図は好適な一例の装置を示し、１は噴流塔で塔径20
0mm、高さ1800mm、空気噴出径は42mmで、肥料投入口
２、排ガス噴出口３を有する。噴流用空気はブロアー10
から送られ、オリフィス流量計９、熱交換器８を経て噴
流塔に至るが、流量は流量計、温度は熱交換器で管理さ
れ、排ガスは排ガス噴出口３から塔外に導かれる。被覆
処理に供する粒状肥料は、肥料投入口２から所定の熱風
を通しながら投入し、噴流を形成させる。被膜処理は被
覆粒子温度が所定の温度になってから、ポリカプロラク
トン含有被覆液を液体ノズル４を通して噴霧状で噴流に
向かって吹き付ける。被覆液調製は液タンク11に所定量
の被膜材と溶剤を入れ、溶剤の沸点近くで撹拌しながら
行う。被覆液の供給は、ポンプ５によってノズル４に送
られるが、この系は温度を保持するための充分な保温を
しておく。所定の被覆液を供給したならばポンプを止め
た後、ブロワーを止める。被覆された肥料は、抜出口７
から取り出される。６はバルブである。第１図におい
て、T1,T2,T3,は温度計、SLはスチームである。なお、
本例では何れも、下記の基本条件を保持して粒状肥料の
被覆を行った。Examples 1 to 9 and Comparative Example (1) Apparatus and Manufacturing Method FIG. 1 shows a preferable example of the apparatus, 1 is a jet tower with a diameter of 20
It has a height of 0 mm, a height of 1800 mm, an air ejection diameter of 42 mm, and has a fertilizer inlet 2 and an exhaust gas outlet 3. Blower 10 for jet air
The flow rate is controlled by the flow meter and the temperature is controlled by the heat exchanger, and the exhaust gas is guided from the exhaust gas jet port 3 to the outside of the tower through the orifice flow meter 9 and the heat exchanger 8. The granular fertilizer to be used for the coating treatment is introduced from the fertilizer introduction port 2 while passing a predetermined hot air to form a jet flow. In the coating treatment, after the temperature of the coated particles reaches a predetermined temperature, the coating solution containing polycaprolactone is sprayed through the liquid nozzle 4 toward the jet stream in a spray state. The coating liquid is prepared by putting a predetermined amount of the coating material and the solvent in the liquid tank 11 and stirring the mixture near the boiling point of the solvent. The supply of the coating liquid is sent to the nozzle 4 by the pump 5, and this system is kept warm enough to maintain the temperature. When the predetermined coating liquid is supplied, the pump is stopped and then the blower is stopped. The coated fertilizer has an outlet 7
Taken from. 6 is a valve. In FIG. 1, T 1 , T 2 , T 3 are thermometers and SL is steam. In addition,
In each of the examples, the granular fertilizer was coated under the following basic conditions.
液体ノズル；開口0.8mmフルコン型 熱風量;4m2/min 熱風温度;100℃ 肥料の種類;5−7meshの燐硝安加里 肥料投入量;5kg 被覆液濃度；固形分 ５重量％ 被覆液供給量;0.5kg/min 被覆時間;10分 被覆率（対肥料）;5.5重量％（ただし、界面活性剤分は
上乗せ） 溶剤；テトラクロルエチレン （２） 被膜の組成ならびにその窒素溶出量 前記の製造方法よって、第１表に示す各種被膜組成の被
覆燐硝安加里の製造を行い、それぞれの窒素溶出量を試
験して、その結果を第１表に記載した。Liquid nozzle; Opening 0.8mm Full-con type hot air flow rate; 4m 2 / min Hot air temperature; 100 ° C Fertilizer type; 5-7mesh Phosphorus nitrate Akari fertilizer input amount; 5kg coating liquid concentration; solid content 5% by weight coating liquid supply amount; 0.5kg / min Coating time; 10 minutes Coating rate (against fertilizer); 5.5% by weight (addition of surfactant) Solvent: Tetrachlorethylene (2) Composition of coating and its nitrogen elution amount The coated phosphorous nitrate Akari of various coating compositions shown in Table 1 was produced, and the nitrogen elution amount of each was tested, and the results are shown in Table 1.
（３） 被膜の土壌分解テスト 本例のサンプル30粒を一粒ずつ二面をカットし、水中に
静置して内部の肥料分を除去し、リング状の膜を作る。(3) Soil decomposition test of coating film 30 pieces of the sample of this example are cut on two sides one by one, and the fertilizer content inside is removed by leaving still in water to form a ring-shaped film.
土壌は肥沃な洪積土壌（富士市）を９メッシュ（2mm）
篩でふるい、通過した土壌を供試土壌とする。供試土壌
を箱に入れてベッドにし、前記のリングをベッドに水平
に、約１〜2.5cmの深さに埋め込み、温室に設置する。
ベッドが乾燥しないように時おり水を注ぐ。これを３ケ
月毎に掘り出して、リングの状況を観察、強度を測定す
る。これらの観察状況を第２表に、比較例及び実施例１
〜３の強度を第２図に示す。また、比較例及び実施例１
〜３の強度保持率を第３図に示す。The soil is fertile diluvial soil (Fuji City) 9 mesh (2 mm)
The soil that has passed through the sieve is used as the test soil. The test soil is placed in a box to form a bed, and the ring is embedded horizontally in the bed at a depth of about 1 to 2.5 cm and placed in a greenhouse.
Pour water occasionally to prevent the bed from drying out. This is dug out every three months, the condition of the ring is observed, and the strength is measured. These observation conditions are shown in Table 2, and Comparative Example and Example 1
The intensities of ~ 3 are shown in FIG. In addition, Comparative Example and Example 1
The strength retention rates of ~ 3 are shown in FIG.
〔発明の効果〕 本発明の被覆粒状肥料は、肥効持続期間の調節ができ、
肥料分溶出後、被膜は、土壌微生物により崩壊、分解
し、土壌中に残留しない。さらに、作物の栽培期間後の
残量成分量は、被膜が崩壊、分解することによりなくな
り、肥培管理が容易になるなどの効果を有する。 [Effect of the invention] The coated granular fertilizer of the present invention can control the duration of fertilization,
After elution of the fertilizer, the film disintegrates and decomposes due to soil microorganisms and does not remain in the soil. Further, the residual component amount after the cultivation period of the crop disappears due to the disintegration and decomposition of the coating film, which has the effect of facilitating fertilization management.
第１図は本発明品の製造に適した装置の一例を示す正面
図、第２図はリング状被膜の土壌分解テストの強度変化
を示すグラフ、第３図は土壌分解テスト前のリング状被
膜の強度を100％としたときの強度保持率の変化を示す
グラフである。 １……噴流塔、２……肥料投入口、３……排ガス噴出
口、４……流体ノズル、５……ポンプ、６……バルブ、
７……抜出口、８……熱交換器、９……オリフィス流量
計、10……ブロアー、11……液タンク、T1,T2,T3,……
温度計、SL……スチームFIG. 1 is a front view showing an example of an apparatus suitable for producing the product of the present invention, FIG. 2 is a graph showing the strength change of a soil decomposition test of a ring-shaped film, and FIG. 3 is a ring-shaped film before the soil decomposition test. 3 is a graph showing the change in strength retention rate when the strength of is 100%. 1 ... Jet tower, 2 ... Fertilizer inlet, 3 ... Exhaust gas outlet, 4 ... Fluid nozzle, 5 ... Pump, 6 ... Valve,
7 ...... extraction port, 8 ...... heat exchanger, 9 ...... orifice meter, 10 ...... blower, 11 ...... tank, T 1, T 2, T 3, ......
Thermometer, SL ... Steam
Claims (1)
ロラクトンと、被膜材Ｂとしてオレフィン重合物、オレ
フィンを含む共重合物、塩化ビニリデン重合物、塩化ビ
ニリデンを含む共重合物、ジエン系重合物、ワックス
類、石油樹脂、天然樹脂、油脂およびその変性物から選
ばれた１種または２種以上の物質との混合物を被覆して
なることを特徴とする被覆粒状肥料。1. Polycaprolactone as a coating material A on the surface of a granular fertilizer, an olefin polymer as a coating material B, an olefin-containing copolymer, a vinylidene chloride polymer, a vinylidene chloride-containing copolymer, and a diene polymer. A coated granular fertilizer characterized by being coated with a mixture of one or more substances selected from waxes, petroleum resins, natural resins, fats and oils and modified products thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1283048A JPH07505B2 (en) | 1989-11-01 | 1989-11-01 | Coated granular fertilizer consisting of degradable coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1283048A JPH07505B2 (en) | 1989-11-01 | 1989-11-01 | Coated granular fertilizer consisting of degradable coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03146492A JPH03146492A (en) | 1991-06-21 |
| JPH07505B2 true JPH07505B2 (en) | 1995-01-11 |
Family
ID=17660536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1283048A Expired - Lifetime JPH07505B2 (en) | 1989-11-01 | 1989-11-01 | Coated granular fertilizer consisting of degradable coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07505B2 (en) |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211985A (en) * | 1991-10-09 | 1993-05-18 | Ici Canada, Inc. | Multi-stage process for continuous coating of fertilizer particles |
| JPH0733575A (en) * | 1993-07-14 | 1995-02-03 | Central Glass Co Ltd | Coating composition for fertilizer, coated granular fertilizer and its production |
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| JPH0769770A (en) * | 1993-08-27 | 1995-03-14 | Central Glass Co Ltd | Composition for coating fertilizer, coated granular fertilizer and their production |
| DE69318580T2 (en) * | 1993-12-10 | 1999-01-21 | Canada Minister Defence | PHOTO AND BIODEGRADABLE POLYMER BLENDS |
| US6503288B1 (en) | 1996-12-30 | 2003-01-07 | Bayer Corporation | Process for the production of biodegradable encapsulated fertilizers |
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| EP1008629A1 (en) * | 1998-05-30 | 2000-06-14 | DAICEL CHEMICAL INDUSTRIES, Ltd. | Biodegradable polyester resin composition, biodisintegrable resin composition, and molded objects of these |
| US6001147A (en) * | 1998-07-23 | 1999-12-14 | Bayer Corporation | Unsymmetrical polyureaurethane fertilizer encapsulation |
| US6165550A (en) * | 1998-07-23 | 2000-12-26 | Bayer Corporation | Symmetrical Polyurea-urethane fertilizer encapsulation |
| US7371444B2 (en) | 1998-11-13 | 2008-05-13 | Daicel Chemical Industries, Inc. | Aliphatic copolyester resin, a preparation method, an aliphatic polyester resin composition, uses thereof, a coating composition, a particle-state composition for agriculture and gardening coated by degradable layer |
| US6509440B1 (en) * | 1998-11-13 | 2003-01-21 | Daicel Chemical Industries, Ltd | Aliphatic copolymer, production process, aliphatic polyester resin composition, various uses, coating composition, and agricultural or horticultural particulate composition comprising degradable coating film |
| US6364925B1 (en) | 1999-12-10 | 2002-04-02 | Bayer Corporation | Polyurethane encapsulated fertilizer having improved slow-release properties |
| US6358296B1 (en) | 2000-07-11 | 2002-03-19 | Bayer Corporation | Slow-release polyurethane encapsulated fertilizer using oleo polyols |
| US9321699B2 (en) * | 2012-11-21 | 2016-04-26 | The Mosaic Company | Granular fertilizers having improved dust control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6340789A (en) * | 1986-08-05 | 1988-02-22 | チッソ株式会社 | Granular fertilizer coated with decomposable coating and manufacture |
-
1989
- 1989-11-01 JP JP1283048A patent/JPH07505B2/en not_active Expired - Lifetime
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| CN105085098A (en) * | 2015-08-28 | 2015-11-25 | 李志山 | Controlled-release fertilizer for pumpkins and preparation method for controlled-release fertilizer |
| CN105130690A (en) * | 2015-08-28 | 2015-12-09 | 李志山 | Chili-controlled release fertilizer and preparation method thereof |
| CN105237251A (en) * | 2015-08-28 | 2016-01-13 | 李志山 | Release-control fertilizer for brassica juncea and preparation method thereof |
| CN105237138A (en) * | 2015-08-28 | 2016-01-13 | 李志山 | Release-controlled fertilizer for Chinese yam and preparation method thereof |
| CN105237252A (en) * | 2015-08-28 | 2016-01-13 | 李志山 | Tomato release-controllable fertilizer and preparation method thereof |
| CN105198603A (en) * | 2015-09-29 | 2015-12-30 | 广西百润源农业有限公司 | Pointed-tail Chinese cabbage controlled-release fertilizer and preparation method thereof |
| CN105198604A (en) * | 2015-09-29 | 2015-12-30 | 广西百润源农业有限公司 | Fragrant taro controlled-release fertilizer and preparation method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPH03146492A (en) | 1991-06-21 |
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