JPH11314991A - Production of slow-release granular fertilizer - Google Patents
Production of slow-release granular fertilizerInfo
- Publication number
- JPH11314991A JPH11314991A JP10121934A JP12193498A JPH11314991A JP H11314991 A JPH11314991 A JP H11314991A JP 10121934 A JP10121934 A JP 10121934A JP 12193498 A JP12193498 A JP 12193498A JP H11314991 A JPH11314991 A JP H11314991A
- Authority
- JP
- Japan
- Prior art keywords
- fertilizer
- fertilizers
- slow
- granular
- weight
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、緩効性肥料である
けい酸加里肥料と尿素−ホルムアルデヒド縮合物とを含
有する緩効性粒状肥料の製造法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a slow-release granular fertilizer containing a potassium silicate fertilizer which is a slow-release fertilizer and a urea-formaldehyde condensate.
【０００２】[0002]
【従来の技術】従来使用されている加里肥料の多くは、
塩化加里や硫酸加里であり、いずれも水に易溶性である
と共に塩素や硫酸という塩類を含んでいるため、土壌中
で作物に加里が吸収されると、残った塩類が土壌に集積
され、土壌を酸性化したり、植物などに種々の障害をも
たらすという問題があった。また、水に易溶性であるた
め、土壌中で植物に吸収される前に流出することが多
く、流出した肥料は河川や地下水汚染の原因になるとい
う問題があった。2. Description of the Related Art Many of the conventionally used kari fertilizers are:
Chlorinated sulfuric acid and sulfuric acid potassium, both of which are readily soluble in water and contain salts such as chlorine and sulfuric acid. There is a problem that acidification is caused or various obstacles are caused to plants and the like. Further, since it is easily soluble in water, it often flows out before being absorbed by plants in soil, and there is a problem that the fertilizer that flows out causes river or groundwater contamination.
【０００３】そこで、塩素や硫酸などの塩類を含まず、
かつ水に難溶の緩効性加里肥料として、石炭火力発電所
で発生する微粉炭燃焼灰と水酸化加里及び炭酸苦土を混
合して焼成して製造される組成物であるけい酸加里肥料
を使用する技術が知られている。しかし、このけい酸加
里肥料を多く含有する粒状肥料を造粒する場合、一般的
に使用されている水、あるいはリグニン、糖蜜等のバイ
ンダーを使用しても造粒が困難であり、また、バインダ
ーを多めに使用することにより造粒できても、歩留りが
悪く連続生産ができないという問題があった。更に、リ
グニン、糖蜜等のバインダ−は高価であり、かつ肥料成
分を含まないので、これらのバインダーを多量に使用す
れば、製品である粒状肥料のコストアップや、肥料成分
含有量の低下という問題が生じる。[0003] Therefore, it does not contain salts such as chlorine and sulfuric acid,
As a slow-acting potassium fertilizer that is hardly soluble in water, silicic acid fertilizer is a composition produced by mixing and burning pulverized coal combustion ash generated at a coal-fired power plant, potassium hydroxide and carbon dioxide. Techniques for using are known. However, when granulating a granular fertilizer containing a large amount of this silicic acid fertilizer, granulation is difficult even using a commonly used binder such as water, or lignin, molasses, and the like. There is a problem that even if granulation can be performed by using a large amount, the yield is poor and continuous production cannot be performed. Furthermore, binders such as lignin and molasses are expensive and do not contain fertilizer components. Therefore, if these binders are used in large amounts, the cost of granular fertilizer as a product increases and the content of fertilizer components decreases. Occurs.
【０００４】一方、緩効性窒素肥料の一つとして、尿素
−ホルムアルデヒド縮合物が使用されている。この尿素
−ホルムアルデヒド縮合物は、一般にはウレアホルム、
ＵＦ肥料、あるいは肥料取締法の分類ではホルムアルデ
ヒド加工尿素肥料などの名称で知られており（以下ＵＦ
肥料と略称する）、尿素とホルムアルデヒドを反応させ
て製造されている。しかし、ＵＦ肥料は、粘性が非常に
強いため、これを粒状肥料の原料として多量に使用する
と、粒状肥料の製造設備として一般に使用される造粒
機、乾燥機、篩等の機器への付着が激しく、閉塞により
連続運転ができなくなるという問題があった。On the other hand, a urea-formaldehyde condensate is used as one of the slow-release nitrogen fertilizers. This urea-formaldehyde condensate is generally ureaform,
In the classification of UF fertilizer or the Fertilizer Control Law, it is known as a formaldehyde-processed urea fertilizer (hereinafter referred to as UF fertilizer).
It is manufactured by reacting urea and formaldehyde. However, since UF fertilizer has a very strong viscosity, if it is used in large amounts as a raw material for granular fertilizer, it will not adhere to granulating machines, dryers, sieves, and other devices generally used as granular fertilizer production equipment. There was a problem that it was so severe that continuous operation could not be performed due to blockage.
【０００５】また、けい酸加里肥料の緩効性を損なうこ
となく、けい酸加里を中和する目的で、けい酸加里肥料
と、尿素−アルデヒド縮合物を含む窒素肥料とを混合
し、造粒することも提案されている。例えば、特公昭６
３−３９５４８号には、尿素−アルデヒド縮合物を含む
窒素肥料粉末と、けい酸加里を含む加里肥料粉末を主体
とする原料に硫酸を添加して造粒する方法が開示され、
また、特公昭６３−３９５４９号には、尿素−アルデヒ
ド縮合物を含む窒素肥料粉末と、けい酸加里を含む加里
肥料粉末を主体とする原料にリン酸を添加して造粒する
方法が開示され、更に、特公昭６３−３９５５０号に
は、加里肥料と燐酸肥料と窒素肥料とを水の存在下で造
粒する方法が開示されている。[0005] Further, for the purpose of neutralizing silicic acid potassium without impairing the slow action of the silicic acid fertilizer, a silicic acid fertilizer and a nitrogen fertilizer containing a urea-aldehyde condensate are mixed and granulated. It has also been suggested to do so. For example,
3-39548 discloses a method of granulating by adding sulfuric acid to a nitrogen fertilizer powder containing a urea-aldehyde condensate and a raw material mainly containing a potassium fertilizer powder containing silica silicate,
JP-B-63-39549 discloses a method of granulating by adding phosphoric acid to a nitrogen fertilizer powder containing a urea-aldehyde condensate and a raw material mainly composed of a potassium fertilizer powder containing silica silicate. Furthermore, Japanese Patent Publication No. 63-39550 discloses a method of granulating a kali fertilizer, a phosphate fertilizer and a nitrogen fertilizer in the presence of water.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記各公報に
は、尿素−アルデヒド縮合物として、尿素とイソブチル
アルデヒドとの反応縮合物であるイソブチリデンジウレ
ア（以下、ＩＢＤＵという）しか例示されていない。と
ころが、このＩＢＤＵは、ＵＦ肥料とは性状が全く異な
り、粘性が弱く、粉状をなしている。このため、けい酸
加里肥料と混合したときの造粒性は少しも改善されず、
所定の粒径のものを歩留りよく生産することができなか
った。However, in each of the above-mentioned publications, only butylidene diurea (hereinafter referred to as IBDU) which is a reaction condensate of urea and isobutyraldehyde is exemplified as the urea-aldehyde condensate. . However, this IBDU is completely different in properties from the UF fertilizer, has a low viscosity, and is in a powder form. For this reason, granulation properties when mixed with silicate kali fertilizer are not improved at all,
Those having a predetermined particle size could not be produced with good yield.
【０００７】したがって、本発明の目的は、けい酸加里
肥料を多量に含む粒状肥料を容易にかつ造粒歩留りよく
生産できるようにした緩効性粒状肥料の製造法を提供す
ることにある。[0007] Accordingly, an object of the present invention is to provide a method for producing a slow-release granular fertilizer capable of easily producing a granular fertilizer containing a large amount of potassium silicate fertilizer with good granulation yield.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、けい酸加里肥料１００重量部に対して、
尿素−ホルムアルデヒド縮合物を２５〜１００重量部の
割合で含有する原料を混合した後、造粒することを特徴
とする緩効性粒状肥料の製造法を提供するものである。In order to achieve the above-mentioned object, the present invention relates to a method for producing 100 parts by weight of silicic acid potassium fertilizer.
It is intended to provide a method for producing a slow-release granular fertilizer, which comprises mixing raw materials containing a urea-formaldehyde condensate in a ratio of 25 to 100 parts by weight and then granulating.
【０００９】本発明によれば、尿素−ホルムアルデヒド
縮合物（ＵＦ肥料）を、けい酸加里肥料１００重量部に
対して２５〜１００重量部の割合で混合して造粒するこ
とにより、強い粘性を有するＵＦ肥料が造粒の際のバイ
ンダーとして作用するので、リグニン、糖蜜のようなバ
インダーを使用することなく、また、けい酸加里肥料の
含有量を高めても、所定の粒径を有する粒状肥料を容易
にかつ歩留りよく連続生産することが可能となる。従っ
て、けい酸加里肥料の含有量の高い緩効性粒状肥料を工
業的に安価に生産することが可能となる。According to the present invention, urea-formaldehyde condensate (UF fertilizer) is mixed and granulated at a ratio of 25 to 100 parts by weight with respect to 100 parts by weight of silicic acid potassium fertilizer to thereby obtain a strong viscosity. Since the UF fertilizer has a function as a binder during granulation, it does not use a binder such as lignin or molasses, and even if the content of the silicate fertilizer is increased, the granular fertilizer having a predetermined particle size. Can be easily and continuously produced with good yield. Therefore, it becomes possible to industrially produce a slow-release granular fertilizer having a high content of silicate kali fertilizer at low cost.
【００１０】なお、本発明においては、粒状肥料中の前
記けい酸加里肥料の含有量を３０重量％以上とすること
が好ましく、更に、粒状肥料中の前記尿素−ホルムアル
デヒド縮合物の含有量を１０重量％以上とすることが好
ましい。これによって、緩効性の加里肥料及び窒素肥料
の含量の高い粒状肥料を提供することができる。[0010] In the present invention, the content of the potassium silicate fertilizer in the granular fertilizer is preferably 30% by weight or more, and the content of the urea-formaldehyde condensate in the granular fertilizer is preferably 10% by weight or more. It is preferable that the content be not less than weight%. Thereby, it is possible to provide a granular fertilizer having a high content of slow-acting potassium fertilizer and nitrogen fertilizer.
【００１１】[0011]
【発明の実施の形態】本発明では、原料として、けい酸
加里肥料１００重量部に対して、ＵＦ肥料を２５〜１０
０重量部、より好ましくは５０〜１００重量部の割合で
配合する。けい酸加里肥料１００重量部に対するＵＦ肥
料の割合が２５重量部未満では、ＵＦ肥料によるバイン
ダー力が不十分となり、造粒歩留りが低下する。また、
けい酸加里肥料１００重量部に対するＵＦ肥料の割合が
１００重量部を超えると、粒径が粗くなりすぎて造粒歩
留りが低下すると共に、造粒機の壁等に付着する量が増
えるという問題が生じる。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, 25 to 10 UF fertilizers are used as raw materials with respect to 100 parts by weight of silicic acid potassium fertilizer.
0 parts by weight, more preferably 50 to 100 parts by weight. If the ratio of the UF fertilizer to 100 parts by weight of the silicic acid potassium fertilizer is less than 25 parts by weight, the binder strength of the UF fertilizer becomes insufficient, and the yield of granulation is reduced. Also,
If the ratio of UF fertilizer to 100 parts by weight of silicic acid fertilizer exceeds 100 parts by weight, there is a problem that the particle size becomes too coarse and the granulation yield decreases, and the amount attached to the walls of the granulator increases. Occurs.
【００１２】なお、本発明において、けい酸加里肥料
は、けい酸加里を主成分として含む肥料原料であればよ
く、同様にＵＦ肥料（尿素−ホルムアルデヒド縮合物）
は、尿素−ホルムアルデヒド縮合物を主成分として含む
肥料原料であればよい。In the present invention, the silicic acid fertilizer may be any fertilizer raw material containing silicic acid as a main component, and similarly, UF fertilizer (urea-formaldehyde condensate).
May be any fertilizer raw material containing a urea-formaldehyde condensate as a main component.
【００１３】また、けい酸加里肥料は、最終製品である
粒状肥料中に３０重量部以上含有されることが好まし
く、５０重量部以上含有されることがより好ましい。更
に、ＵＦ肥料は、最終製品である粒状肥料中に１０重量
％以上含有されることが好ましい。これによって、緩効
性の加里肥料及び窒素肥料の含量を高め、日持ちのする
肥料を提供することができる。[0013] The potassium silicate fertilizer is preferably contained in the granular fertilizer as the final product in an amount of at least 30 parts by weight, more preferably at least 50 parts by weight. Further, the UF fertilizer is preferably contained at 10% by weight or more in the granular fertilizer as the final product. As a result, the content of the slow-acting potassium fertilizer and the nitrogen fertilizer can be increased, and a fertilizer having a long life can be provided.
【００１４】また、本発明の緩効性粒状肥料は、けい酸
加里肥料及びＵＦ肥料の他に、その他の窒素肥料や加里
肥料、更には燐酸肥料、苦土肥料、有機質肥料などを適
宜選択して併用することができる。特に、植物に必要な
三大栄養素の一つである燐酸を補うと共に、けい酸肥料
のアルカリを中和するため、燐酸肥料を添加することが
好ましい。The slow-release granular fertilizer of the present invention may be appropriately selected from other fertilizers, such as nitrogen fertilizer, potassium fertilizer, phosphate fertilizer, magnesia fertilizer, and organic fertilizer, in addition to silicate fertilizer and UF fertilizer. Can be used together. In particular, it is preferable to add a phosphate fertilizer to supplement phosphate, which is one of the three major nutrients required for plants, and to neutralize the alkali of the silicate fertilizer.
【００１５】本発明の緩効性粒状肥料は、上記のような
肥料原料を混合機で混合し、適当量の水を噴霧しなが
ら、造粒機で造粒した後、乾燥することにより得られ
る。造粒機としては、一般的に使用されているもの、例
えば転動式造粒機などを採用することができる。より好
ましくは、パグミルを使用して予備混合した後、転動式
造粒機に導入して造粒し、所定の粒度範囲に入らないも
のは、再びパグミルに戻して原料の一部として再利用す
る、いわゆるスラリー循環式の連続造粒方法が採用され
る。The slow-release granular fertilizer of the present invention is obtained by mixing the above fertilizer raw materials with a mixer, granulating the mixture with a granulator while spraying an appropriate amount of water, and then drying. . As the granulator, a commonly used one, for example, a rolling granulator can be used. More preferably, after premixing using a pug mill, the mixture is introduced into a tumbling granulator and granulated, and those that do not fall within a predetermined particle size range are returned to the pag mill again and reused as a part of the raw material. That is, a so-called slurry circulation type continuous granulation method is employed.
【００１６】本発明の緩効性粒状肥料の形状及び粒径に
ついて特に制限はないが、平均粒径は０．５〜５ｍｍが
好ましく、１〜４ｍｍがより好ましい。平均粒径が０．
５ｍｍ未満では、施肥するときに風に飛ばされたりして
取扱い性が悪くなり、５ｍｍを超えると、均一に散布す
ることが難しくなる。The shape and particle size of the slow-release granular fertilizer of the present invention are not particularly limited, but the average particle size is preferably 0.5 to 5 mm, more preferably 1 to 4 mm. The average particle size is 0.
If it is less than 5 mm, it will be blown away by the wind when fertilizing, and the handleability will be poor. If it is more than 5 mm, it will be difficult to spray uniformly.
【００１７】[0017]
【実施例】実施例１ けい酸加里肥料、ＵＦ肥料、りん安、副産苦土を表１に
示す配合量で配合し、この原料を混合機中で混合した
後、回転皿型造粒機により水を噴霧しながら造粒を行
い、得られた造粒物を加熱乾燥し、篩分して、粒径１〜
４ｍｍの範囲の粒状肥料を得た。EXAMPLE 1 Silicic acid potassium fertilizer, UF fertilizer, phosphorous ammonium, and by-product magnesia were blended in the amounts shown in Table 1, and the raw materials were mixed in a mixer, followed by a rotary dish granulator. Granulation is performed while spraying water by heating, and the obtained granulated material is dried by heating and sieved to obtain a particle size of 1 to 3.
A granular fertilizer in the range of 4 mm was obtained.
【００１８】[0018]
【表１】 ※Ｕ／Ｓ＝ＵＦ肥料／けい酸加里肥料[Table 1] * U / S = UF fertilizer / silicic acid fertilizer
【００１９】比較例１ けい酸加里肥料、ＵＦ肥料、りん安、副産苦土、塩安、
塩化加里を、表２に示す配合量で配合した原料を、実施
例１と同様にして、混合、造粒、加熱乾燥し、粒径１〜
４ｍｍとなるように篩分して、ＵＦ肥料とけい酸加里と
の配合比が本発明で規定する範囲外である緩効性粒状肥
料を得た。Comparative Example 1 Silicic acid potassium fertilizer, UF fertilizer, phosphorous ammonium, by-product magnesia, saltyasu,
The raw materials in which Kali chloride was blended in the blending amounts shown in Table 2 were mixed, granulated, and heat-dried in the same manner as in Example 1 to obtain a particle size of 1 to 3.
The mixture was sieved to 4 mm to obtain a slow-release granular fertilizer in which the mixing ratio of the UF fertilizer and the silica silicate was out of the range specified in the present invention.
【００２０】[0020]
【表２】 ※Ｕ／Ｓ＝ＵＦ肥料／けい酸加里[Table 2] * U / S = UF fertilizer / silicic acid Kali
【００２１】比較例２ けい酸加里肥料、ＵＦ肥料、りん安、副産苦土、塩安、
塩化加里、バインダーを、表３に示す配合量で配合した
原料を、実施例１と同様にして、混合、造粒、加熱乾燥
し、粒径１〜４ｍｍとなるように篩分して、けい酸加里
とＵＦ肥料のいずれか一方のみを含有する緩効性肥料を
得た。Comparative Example 2 Silicic acid potassium fertilizer, UF fertilizer, phosphorous ammonium, by-product magnesia, saltyasu,
Raw materials in which the chloride and binder were blended in the amounts shown in Table 3 were mixed, granulated, and dried by heating in the same manner as in Example 1, and sieved to a particle size of 1 to 4 mm. A slow-release fertilizer containing only one of acid fertilizer and UF fertilizer was obtained.
【００２２】[0022]
【表３】 [Table 3]
【００２３】なお、実施例１、及び比較例１、２で使用
した副産苦土肥料は、水酸化苦土よりマグネシウムクリ
ンカーを製造する時の副産物等からなる。また、原料は
すべて肥料取締法公定規格に定められたものを使用し
た。The by-product magnesia fertilizer used in Example 1 and Comparative Examples 1 and 2 consists of by-products when magnesium clinker is produced from magnesia hydroxide. In addition, all raw materials used were those specified in the official standards of the Fertilizer Control Law.
【００２４】試験例１ 実施例１と比較例１、２における〜の緩効性肥料
と、更に、実施例１のの原料配合において、ＵＦ肥料
の代わりにＩＢＤＵを同量供給した以外は、実施例１と
同様にして、混合、造粒、加熱乾燥を行って得た緩効性
粒状肥料（）について、造粒状況を観察した結果と、
篩分して得た粒径１〜４ｍｍの範囲の製品の、下記数式
１で求めた歩留りとを表４に示す。Test Example 1 The slow-release fertilizer of Example 1 and Comparative Examples 1 and 2 and the raw material mixture of Example 1 were used except that the same amount of IBDU was supplied instead of UF fertilizer. In the same manner as in Example 1, the results of observing the state of granulation of the slow-release granular fertilizer () obtained by mixing, granulating, and heating and drying,
Table 4 shows the yields of the products having a particle size in the range of 1 to 4 mm obtained by sieving and determined by the following formula 1.
【００２５】[0025]
【数１】歩留り（％）＝（１〜４mm品の重量ｇ）／（供
給した原料の総重量ｇ）×100## EQU1 ## Yield (%) = (weight of 1-4 mm product) / (total weight of supplied raw material g) × 100
【００２６】[0026]
【表４】 ※Ｕ／Ｓ＝ＵＦ肥料／けい酸加里肥料[Table 4] * U / S = UF fertilizer / silicic acid fertilizer
【００２７】表４に示されるように、本発明の方法で作
られた粒状肥料〜は、歩留りが６０〜７５％と高い
のに対し、ＵＦ肥料とけい酸加里肥料との配合比が本発
明で規定する範囲外である粒状肥料、や、ＵＦ肥料
を配合しない粒状肥料や、けい酸加里肥料を配合しな
い粒状肥料や、ＵＦ肥料の代わりにＩＢＤＵを配合し
た粒状肥料は、いずれも歩留りが著しく低くなること
がわかる。また、ＵＦ肥料の配合割合が高い、は、
造粒機の壁に付着する量が多く、造粒作業性が悪いこと
がわかる。As shown in Table 4, the yield of the granular fertilizer produced by the method of the present invention is as high as 60 to 75%, whereas the compounding ratio of the UF fertilizer and the silicate fertilizer is different from the present invention. Granular fertilizers outside the specified range, or granular fertilizers without UF fertilizer, or granular fertilizers without silicate fertilizer, and granular fertilizers with IBDU instead of UF fertilizer, all have significantly lower yields. It turns out that it becomes. Also, the compounding ratio of UF fertilizer is high,
It can be seen that the amount attached to the wall of the granulator is large, and the granulation workability is poor.
【００２８】[0028]
【発明の効果】以上説明したように、本発明によれば、
ＵＦ肥料とけい酸肥料とを所定の割合で配合した原料を
混合し造粒することにより、バインダーを使用すること
なく、けい酸加里肥料の含有量の高い、所定の粒径を有
する粒状肥料を、容易にかつ歩留りよく連続生産するこ
とが可能となる。従って、けい酸加里肥料の含有量の高
い緩効性粒状肥料を工業的に安価に生産することが可能
となる。As described above, according to the present invention,
By mixing and granulating raw materials in which UF fertilizer and silicate fertilizer are blended in a predetermined ratio, without using a binder, a high content of silicate fertilizer, a granular fertilizer having a predetermined particle size, Continuous production can be performed easily and with good yield. Therefore, it becomes possible to industrially produce a slow-release granular fertilizer having a high content of silicate kali fertilizer at low cost.
Claims (3)
尿素−ホルムアルデヒド縮合物を２５〜１００重量部の
割合で含有する原料を混合した後、造粒することを特徴
とする緩効性粒状肥料の製造法。[Claim 1] 100 parts by weight of silicic acid fertilizer
A method for producing a slow-release granular fertilizer, comprising mixing a raw material containing a urea-formaldehyde condensate in a ratio of 25 to 100 parts by weight and then granulating.
量を３０重量％以上とする請求項１記載の緩効性粒状肥
料の製造法。2. The method for producing a slow-release granular fertilizer according to claim 1, wherein the content of the potassium silicate fertilizer in the granular fertilizer is 30% by weight or more.
ド縮合物の含有量を１０重量％以上とする請求項１又は
２記載の緩効性粒状肥料の製造法。3. The method for producing a slow-release granular fertilizer according to claim 1, wherein the content of the urea-formaldehyde condensate in the granular fertilizer is 10% by weight or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10121934A JPH11314991A (en) | 1998-05-01 | 1998-05-01 | Production of slow-release granular fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10121934A JPH11314991A (en) | 1998-05-01 | 1998-05-01 | Production of slow-release granular fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11314991A true JPH11314991A (en) | 1999-11-16 |
Family
ID=14823558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10121934A Pending JPH11314991A (en) | 1998-05-01 | 1998-05-01 | Production of slow-release granular fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11314991A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400475C (en) * | 2005-06-20 | 2008-07-09 | 上海化工研究院 | Method for producing complex fertilizer without drying process |
| CN104355889A (en) * | 2014-11-18 | 2015-02-18 | 刘健 | Compound fertilizer |
| CN104355756A (en) * | 2014-11-18 | 2015-02-18 | 刘健 | Formulated fertilizer |
-
1998
- 1998-05-01 JP JP10121934A patent/JPH11314991A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400475C (en) * | 2005-06-20 | 2008-07-09 | 上海化工研究院 | Method for producing complex fertilizer without drying process |
| CN104355889A (en) * | 2014-11-18 | 2015-02-18 | 刘健 | Compound fertilizer |
| CN104355756A (en) * | 2014-11-18 | 2015-02-18 | 刘健 | Formulated fertilizer |
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