JPH0717788A - Tableted fertilizer - Google Patents

Abstract

PURPOSE:To provide tableted fertilizer having a slow-release property suitable for horticulture and greening and excellent moldability. CONSTITUTION:This fertilizer is formed by tableting the powder and granular material of fertilizer components and mineral heavy duty oil. The content of this mineral heavy duty is 0.01 to 0.7wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tableting fertilizer having a slow release effect suitable for gardening and greening.

[0002]

2. Description of the Related Art Recently, cultivation forms using plug seedlings have become widespread in the fields of horticulture and greening, and fertilizers having a fertilization duration of 1 to 1 year are required for pot seedlings and pots. The conventional fast-acting fertilizers using ammonium sulfate, urea, and ammonium phosphate cannot achieve the fertilizing effect from January to 1 year. 2-10
Some mm slow-release granular fertilizers have a fertilizing effect for several months, but since these have a particle size distribution, if the numbers per pot (pot) are made uniform, there will be a weight difference between the pots. Fertilizer effect is likely to occur. On the other hand, in order to make the weight per pot uniform, it is necessary to weigh the number of pots each time, which is troublesome.

As a slow-acting fertilizer of uniform size, isobutylidene diurea, which is one of the reaction products of aldehyde and urea, and mineral heavy oil are compression-molded by a roll press ( Japanese Patent Publication No. 54-24942) is also known and widely used. This molded fertilizer has a product hardness,
Although it has excellent properties such as shape retention in water and drop strength, it has a long fertilization duration of 1 to 5 years and is not suitable for the above applications. In addition, although in such a roll press is easy molding of 5 to 100 cm ^3, when trying to make a molded product of less than 5 cm ³ to between January 1 year Koeko duration, roll portion is small Therefore, the molding pressure is not applied and the moldability becomes extremely poor.

Therefore, in order to obtain a molding fertilizer having a size of less than 5 cm ³ , a tableting method can be considered because a molding pressure is applied. In order to secure shape retention and yield and increase product hardness by using fertilizer raw materials, it is necessary to improve peelability from the mold, prevent capping, and prevent lamination. Conventionally, addition of an inorganic salt of stearic acid has been known to improve peelability. However, addition of an inorganic salt of stearic acid tends to cause capping and lamination.
In addition, when using heavy mineral oil for tableting with reference to Japanese Patent Publication No. 54-24942, addition of 1 to 5% by weight of heavy oil exudes heavy oil from the tableting die and adversely affects moldability. give. In addition, in the case of tablet presses, unlike roll presses,
The raw material is supplied to the mold while the lower punch of the mold descends and fills the raw material while the raw material is flowing on the rotating disk, but the heavy oil forms lumps with the raw material. Therefore, the moldability becomes poor and the moldability deteriorates.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a tableting molding fertilizer having excellent moldability and having a slow-release property suitable for gardening and greening.

[0006]

Means for Solving the Problems As a result of intensive studies conducted by the present inventors in order to achieve this object, as a result, the heavy mineral oil of 0.
The present invention has been accomplished by finding that a good tableting molding fertilizer can be obtained by adding and adding 01 to 0.7% by weight.
That is, the present invention is a fertilizer obtained by tableting a granular material of a fertilizer component and a mineral heavy oil, wherein the content of the mineral heavy oil is 0.01 to 0.7% by weight. The gist is the tableting fertilizer, which is characterized by being present.

The present invention will be described in more detail below. Examples of fertilizer components used in the present invention include various fertilizers described below. Isobutyraldehyde, n-butyraldehyde, as a nitrogen fertilizer hardly soluble in water, which is a reaction product of an aldehyde having 4 or less carbon atoms and urea,
Propionaldehyde, crotonaldehyde, acetaldehyde, aldehydes having a carbon number of 4 or less such as formaldehyde, or those obtained by reacting a mixture thereof with urea, specifically, isobutylidene diurea, n-butylidene diurea, propyiene Examples thereof include reaction products of formaldehyde and urea, which have the same solubility in water as that of isobutylidene diurea, such as lidendiurea, crotonilidene diurea, ethylidene diurea. Other fertilizer components include ammonium sulfate, urea, ammonium nitrate, ammonium chloride, ammonium phosphate, lime superphosphate, lime superphosphate, fertilizer, processed phosphate fertilizer, potassium sulfate, potassium chloride, potassium silicate. can give. The fertilizer component which is hardly soluble in water can be used alone, or can be used in combination with other fertilizer components as appropriate for the crop. At this time, there is no problem in the case of a combination of isobutylidene diurea, fertilizer and some processed phosphate fertilizers or fertilizers that are poorly soluble in water, such as potassium silicate, but there is no problem, but ammonium sulfate, urea and superphosphate are used. When a fast-acting fertilizer such as lime or potassium sulfate is added, these fast-acting fertilizer components are eluted first from the molded fertilizer. In such a case, the shape-retaining property of the molded fertilizer is generally lost, and the fertilizing effect persists. However, when the mineral heavy oil of the present invention coexists, even if the fast-acting fertilizer component is eluted first, The shape is maintained and there is little effect on fertilization. In particular, when the molded fertilizer contains 5 to 35% by weight, preferably 10 to 30% by weight of a fast-acting fertilizer, the shape-retaining effect and the slow-releasing effect due to the inclusion of the mineral heavy oil are remarkable.

The particle size of the granular material of the raw material for molding fertilizer is 1 m in terms of the filling property into the mold and the impregnation property with the heavy mineral oil.
It is desirable to adjust so as to pass through a m sieve. A so-called lubricating oil is suitable as the mineral heavy oil to be added, but a heavy oil similar to the lubricating oil, for example, a heavy oil for fuel can be used. Examples of the lubricating oil include spindle oil, dynamo oil, turbine oil, machine oil, mobile oil, liquid paraffin and the like. Examples of heavy fuel oil include heavy fuel oil C and heavy fuel oil such as Minas heavy oil. One or more of these mineral heavy oils are added to the granular material of the fertilizer raw material. If the addition amount is 0.01 to 0.7% by weight based on the powdery or granular material, there is no problem in supplying the raw material to the mold, and there is no oozing from the mold during tableting. From the viewpoint of the above effect, it is more preferable to add and add 0.1 to 0.6% by weight of mineral heavy oil. The method of adding the heavy mineral oil to the powder or granular material is not particularly limited as long as the dispersibility can be secured.

In the present invention, the heavy mineral oil alone has an effect on the peelability, capping and moldability of the tableting fertilizer, but if it is desired to further increase the hardness, rubber latex or an inorganic salt of lignin sulfonic acid. Etc. should be added. The addition amount of each is usually 0.01 to 5% by weight, preferably 0.
1 to 3% by weight is desirable in terms of its effect. The volume of molded fertilizer is 0.1 cm ³ or more from the target fertilization duration 5
cm ^3, preferably lower preferably set to 1 to 4 cm ^3.
The shape of the mold can be selected as appropriate, but the tableting fertilizer obtained is preferably in the shape of an elliptical pellet because it is easy to handle during soil insertion and fertilization.

[0010]

EXAMPLES The present invention will be described in more detail with reference to Examples below, but the present invention is not limited to the following Examples without departing from the gist thereof. Example 1 and Comparative Example 1 339 parts of isobutylidene diurea powder (particle name: IBDU, manufactured by Mitsubishi Kasei Co., Ltd.) having a particle size of 0.2 to 0.7 mm,
Pulverized fertilizer powder granules crushed and passed through a 1 mm sieve (Mitsubishi Kasei Co., Ltd., trade name Linster) 350 parts, 1 mm
189 parts of potassium sulphate passed through a sieve of No. 1 and 0.5 parts of potassium silicate passed through a sieve of 1 mm were mixed with 0.5 parts of Minas heavy oil.
Wt% was added.

A tablet fertilizer manufactured by Kikusui Seisakusho Co., Ltd. was used to tablet mold to a weight of 2 g to produce a molded fertilizer. For comparison, a molded fertilizer was produced by tableting in the same manner except that heavy oil was not added (Comparative Example 1). Table 1 shows the presence or absence of capping, peelability, hardness, and product appearance of the obtained molded fertilizer.

[0012]

[Table 1]

Example 2 339 parts of isobutylidene diurea powder having a particle size of 0.2 to 0.7 mm (trade name: IBDU, manufactured by Mitsubishi Kasei Co., Ltd.),
Pulverized fertilizer powder granules crushed and passed through a 1 mm sieve (Mitsubishi Kasei Co., Ltd., trade name Linster) 350 parts, 1 mm
189 parts of potassium sulphate passed through a sieve of No. 1 and 0.5 parts of potassium silicate passed through a sieve of 1 mm were mixed with 0.5 parts of Minas heavy oil.
%, And further 1% by weight of an inorganic salt of ligninsulfonic acid (manufactured by Sanyo Kokusaku Pulp Co., Ltd., sun extract) was added and mixed.

Using a tablet machine manufactured by Kikusui Seisakusho Co., Ltd., tableting was performed so as to have a weight of 2 g to produce molded fertilizer. The presence or absence of capping of the obtained molded fertilizer, peelability,
The hardness and product appearance are shown in Table-2.

[0015]

[Table 2]

[0016]

EFFECTS OF THE INVENTION The tableting fertilizer of the present invention has a slow release effect suitable for gardening and greening, and exhibits good moldability.

Claims (1)

[Claims] 1. A fertilizer obtained by tableting a granular material of a fertilizer component and a mineral heavy oil, wherein the content of the mineral heavy oil is 0.01 to 0.7% by weight. A tablet-molding fertilizer characterized by being present.