JP2006096628A - Magnesia manure and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a granular magnesia manure rich in water-soluble magnesia and little in flying fine particles, and a method of manufacturing the magnesia manure having the characteristics in good productivity. <P>SOLUTION: This magnesia manure comprises a granular matter containing a humic acid or a substance containing it, and a water-soluble magnesium salt. This magnesia manure comprises a granular matter containing a neutralized product of a humic acid or a substance containing it by a basic magnesium-containing matter, and a water-soluble magnesium salt. In this manufacturing method of the magnesia manure, a natural humic acid or a substance containing it, or a natural humic acid or a substance containing it, which is neutralized by adding a basic magnesium-containing matter, is then added with a water-soluble magnesium salt, and pelletized while it contains water. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a granular bitter fertilizer containing humic acid and a method for producing the same.

Humic acid is a naturally-occurring macromolecular organic substance that is useful for the growth of plants, improving the fertilizer effect of phosphate fertilizer (preventing the fixation of phosphate to soil), improving the vitality of roots, improving soil fertility, soil In addition to promoting the agglomeration of the soil and imparting buffering properties to the soil reaction, it has the effect of promoting the transfer of useful bases such as lime and bitter soil to the lower soil layer, but it has been certified as a fertilizer component by the Fertilizer Control Law. Not a substance. However, in order to utilize such advantages of humic acid, a humic acid bitter fertilizer in which humic acid and a bitter earth content are mixed is commercially available. Humic acid bitter fertilizer is produced by, for example, reacting young charcoal such as lignite and grass charcoal with nitric acid to artificially produce humic acid, and neutralizing it with a basic magnesium-containing substance (Patent Literature). 1).
Japanese Patent Publication No. 40-14122

  However, in order not to lose the water-soluble magnesia content in the humic acid magnesia fertilizer produced by the above method, a closed reactor is used, for example, the water content is 30% or more and the temperature is 60 ° C or more. Since it was necessary to hold for 30 minutes or more in an atmosphere, productivity was not good. In addition, the produced humic acid bitter fertilizer is in a powdery state with a lot of powder, and the content of the water-soluble bitter soil cannot be increased sufficiently.

  An object of the present invention is to provide a granular bitter fertilizer having a high water-soluble bitter content and less powdering. Another object of the present invention is to provide a method for producing a bitter manure having such characteristics with high productivity.

  The present invention is a clay soil fertilizer comprising a granular material containing humic acid or a content thereof and a water-soluble magnesium salt. In addition, the present invention is a clay soil fertilizer characterized by comprising a granulated material containing a neutralized product of humic acid or its inclusions with a basic magnesium-containing substance and a water-soluble magnesium salt.

  Furthermore, the present invention is a method for producing a bitter fertilizer characterized by adding a water-soluble magnesium salt to natural humic acid or a content thereof and granulating it in a water-containing state. Further, the present invention is characterized by adding a basic magnesium-containing substance to natural humic acid or its inclusions, neutralizing it, adding a water-soluble magnesium salt, and granulating it in a water-containing state. It is a manufacturing method of soil fertilizer. In addition, the present invention is a method for producing a bitter soil fertilizer characterized by adding a water-soluble magnesium salt to a reaction product of juvenile charcoal and nitric acid and / or sulfuric acid and granulating it in a water-containing state. Further, the present invention is to neutralize a reaction product of juvenile charcoal with nitric acid and / or sulfuric acid by adding a basic magnesium-containing substance, and then add a water-soluble magnesium salt and granulate in a water-containing state. This is a method for producing a clay soil fertilizer.

  In at least one of the inventions described above, it is preferable to have at least one embodiment selected from the following. That is, humic acid or its content is natural humic acid, humic acid or its content is a reaction product of young charcoal and nitric acid and / or sulfuric acid, young charcoal is grass and / or lignite The water-soluble magnesium salt is at least one selected from magnesium sulfate, magnesium nitrate, magnesium chloride and magnesium acetate, and the basic magnesium-containing material is magnesite, magnesia, dolomite, serpentine, magnesium silicate and water It is at least one selected from magnesium oxide, the content of water-soluble magnesium in the mould fertilizer is 1 to 15% by mass as magnesium oxide, and the average particle size of the mould fertilizer is 1 to 5 mm. That is.

  ADVANTAGE OF THE INVENTION According to this invention, a granular bituminous fertilizer with much water-soluble bitter soil content and few powdering is provided. Moreover, since the bitter soil fertilizer which has such a characteristic can be manufactured even if it does not pass through a high temperature holding process and a neutralization process, operation becomes easy and productivity improves. Furthermore, since the water-soluble mould component in the granular mould fertilizer of the present invention has the property of easily penetrating into the soil, an effect of increasing the effectiveness can be expected.

  The bitter fertilizer of the present invention comprises humic acid (also referred to as “humic acid”) or its content, or a neutralized product of humic acid or its content with a basic magnesium-containing substance, as a water-soluble magnesium salt. It consists of granulated granules. Examples of humic acid or its contents include naturally occurring humic acid, humic acid-containing substances obtained by natural oxidation of young charcoal such as lignite and grass charcoal, reaction of young charcoal with nitric acid and / or sulfuric acid. At least one selected from products (those subjected to nitric acid oxidation is nitrohumic acid) and the like are used.

  Granulation with water-soluble magnesium salt enables granulation without adding binders such as waste molasses, waste molasses fermentation waste, pulp waste, lignin sulfonic acid, starch, etc. It becomes a soil for fertilizer. The water-soluble magnesium salt may be any water-soluble magnesium compound, but preferably at least one selected from magnesium sulfate, magnesium nitrate, magnesium chloride and magnesium acetate can be used. Among these, magnesium sulfate is particularly preferable.

  The content of the water-soluble magnesium salt in the bitter fertilizer is preferably 1 to 15% by mass as the magnesium oxide content (water-soluble mould) from the viewpoints of granulation properties, fertilizer effectiveness and economy. In order to contain more water-soluble magnesia, it is necessary to neutralize humic acid or its contents with a basic magnesium-containing substance and then granulate with a water-soluble magnesium salt.

  As the basic magnesium-containing substance, for example, at least one selected from magnesite, magnesia, dolomite, serpentine, magnesium silicate, and magnesium hydroxide can be used. The amount of basic magnesium-containing material used is sufficient to neutralize the reaction product of juvenile charcoal with nitric acid and / or sulfuric acid to a pH of about 6 to 8, and is 5 for 100 parts by mass of the reaction product. -25 mass parts is preferable.

  From the viewpoint of handling and fertilization effect, it is preferable that the particle size of the bitter fertilizer of the present invention is 1 to 5 mm as an average particle size.

  The method for producing a bitter fertilizer according to the present invention comprises adding a water-soluble magnesium salt to natural humic acid or its content and granulating it in a water-containing state (Production method a), natural humic acid or its content. After adding and neutralizing a basic magnesium-containing substance, a water-soluble magnesium salt is added and granulated in a water-containing state (Production method b), to the reaction product of young charcoal and nitric acid and / or sulfuric acid. A method in which a water-soluble magnesium salt is added and granulated in a water-containing state (Production method c). After neutralizing a reaction product of young charcoal with nitric acid and / or sulfuric acid by adding a basic magnesium-containing material, The method of granulating in the state which added the property magnesium salt and made it water-containing (manufacturing method d). According to the manufacturing method a and the manufacturing method c, a neutralization process can be abbreviate | omitted, and according to the manufacturing method b and the manufacturing method d, the mould fertilizer with much more water-soluble magnesia can be manufactured.

  In order to perform granulation in a water-containing state, for example, a method in which each material is mixed with water in advance and then introduced into a granulator, and further granulated while adding water is preferable. At that time, it is preferable to dissolve water-soluble magnesium in water. As the granulation method, any of a rolling granulation method and an extrusion granulation method can be employed.

Example 1
Humic acid {Unneutralized humic acid (reaction product of lignite and nitric acid, commercial product)} and water-soluble magnesium salt (magnesium sulfate powder: commercial product, particle size of 0.5 mm or less, water-soluble bitter soil 25% by mass) Were mixed at a ratio (parts by mass) shown in Table 1 using an open mixer. Next, 85 parts by mass of the obtained mixture and 15 parts by mass of water were mixed, and after granulating for 30 minutes by a tumbling granulation method while appropriately adding water, the moisture content became 15% with a 100 ° C. shelf dryer. Until dry. The particle size of the obtained clay soil fertilizer was 1-5 mm. In addition, according to the “Fertilizer Analysis Method” (written by the Ministry of Agriculture, Forestry and Fisheries, National Institute of Agricultural Environment Technology, issued by the Japan Fertilizer Examination Association, issued on December 25, 1992) did. The results are shown in Table 1.

Example 2
It was carried out in the same manner as in Example 1 except that humic acid (natural corrosive acid, mined product, commercial product) was used and each material was blended according to Table 1. The particle size of the obtained clay soil fertilizer was 1 to 5 mm, and the soluble and water-soluble clay soils were as shown in Table 1.

Example 3
The same procedure as in Example 1 was performed except that the ratio of humic acid and water-soluble magnesium salt was changed. The particle size of the obtained clay soil fertilizer was 1 to 5 mm, and the soluble and water-soluble clay soils were as shown in Table 1.

Example 4
As the humic acid, a magnesium humic acid neutralized product {a product obtained by adding a basic magnesium-containing substance (magnesia) to a reaction product of young charcoal (lignite) and nitric acid to neutralize to pH 7.5, a commercial product} was used. Except that, the same procedure as in Example 3 was performed. The particle size of the obtained clay soil fertilizer was 1 to 5 mm, and the soluble and water-soluble clay soils were as shown in Table 1.

Example 5
Humic acid {unneutralized humic acid (reaction product of lignite and nitric acid, commercially available product)} and basic magnesium-containing material (light-burned magnesia powder: particle size 0.5 mm or less, commercially available product, soluble dough 82 Mass%) and a water-soluble magnesium salt (magnesium sulfate powder: commercial product, particle size of 0.5 mm or less, water-soluble magnesia content 25 mass%) were mixed in an open mixer at the ratio shown in Table 1. Next, 85 parts by mass of the obtained mixture and 15 parts by mass of water were mixed, and after granulating for 30 minutes by a tumbling granulation method while appropriately adding water, the moisture content became 15% with a 100 ° C. shelf dryer. Until dry. The particle size of the obtained clay soil fertilizer was 1 to 5 mm, and the soluble and water-soluble clay soils were as shown in Table 1.

Example 6
It carried out similarly to Example 5 except having used the natural corrosive acid (mining goods, commercial item) as humic acid. The particle size of the obtained clay soil fertilizer was 1 to 5 mm, and the soluble and water-soluble clay soils were as shown in Table 1.

Comparative Example 1
Unneutralized humic acid and basic magnesium-containing substance (light calcined magnesia powder: particle size of 0.5 mm or less, commercial product, 82% by mass of soluble magnesia) are mixed in the ratio shown in Table 1 with an open mixer. In the following, granulation was attempted using the obtained mixture under the same conditions as in Example 1, but granulation could not be performed. Table 1 shows the soluble and water-soluble moulds of the obtained powder.

Example 7
Humic acid (naturally occurring, mined product, commercial product), basic magnesium-containing material (serpentine powder, particle size 0.5 mm or less, commercial product, soluble mass 35% by mass) and water-soluble magnesium salt ( Magnesium chloride powder: commercial product, particle size of 0.5 mm or less, water-soluble magnesia content 19% by mass) was used, and the same procedure as in Example 5 was performed except that each material was blended according to Table 2. The particle size of the obtained granulated product was 1 to 5 mm, and the soluble and water-soluble mouldings were as shown in Table 2.

Comparative Example 2
Table 2 shows humic acid (natural corrosive acid, mined product, commercial product) and basic magnesium-containing material (serpentine powder, particle size 0.5 mm or less, commercial product, soluble mass 35% by mass) with an open mixer. Mixed at the indicated ratio. Hereinafter, granulation was attempted using the mixture under the same conditions as in Example 1, but granulation could not be performed. Table 2 shows the soluble and water-soluble moulds of the obtained powder.

Example 8
For the clay soil fertilizer produced in Example 7 and Comparative Example 2, the amount of dust was measured as follows. The results are shown in Table 3.

  Measurement method of dust generation amount: According to “Kumiai Granular Compound Fertilizer Technology (Agricultural Fertilizer Pesticide Department, Bulk Blend Fertilizer)”. 400 g of the clay soil fertilizer was sieved with a 0.991 mm sieve, and the clay soil fertilizer on the 0.991 mm sieve was used as a sample. Next, 3 magnetic balls (diameter: 30 mm, mass: about 35 g) and 100 g of bitter soil fertilizer on a 0.991 mm sieve are put into a porcelain pot (inner diameter: 100 mm, depth: 100 mm). It was rotated at 75 rpm for 15 minutes. Then, the sample was taken out from the porcelain pot, and the mass under a 0.991 mm sieve was measured to obtain the dust generation amount.

Example 8
In order to evaluate the permeability of the bitter earth component into the soil, the magnesium concentration in the soil solution was measured in the following manner with respect to the bitter earth fertilizer manufactured in Examples 4 to 6 and Comparative Example 1. The results are shown in Table 4.

  Measuring method of magnesium concentration in soil solution: About the clay soil fertilizer, 1.2g equivalent amount of the clay soil fertilizer is measured with water soluble soil content, and this is put into a cylindrical container (diameter 65mm, 300 g of light-colored black soil filled in a height of 200 mm) was mixed with 2 cm of the upper layer of dry soil. Thereafter, 100 ml of water was passed from the top to the bottom every day. On the fifth day, the water passed was collected at the bottom and analyzed by atomic absorption spectrometry to measure the magnesium concentration in the soil solution.

  The clay soil fertilizer of the present invention can be used as a humic acid fertilizer.

Claims (13)

  A mould fertilizer comprising a granular material containing humic acid or a content thereof and a water-soluble magnesium salt.   A mould fertilizer comprising a granulated material containing a neutralized product of a humic acid or a substance containing it with a basic magnesium-containing substance and a water-soluble magnesium salt.   The bitter fertilizer according to claim 1 or 2, wherein the humic acid or a content thereof is natural humic acid.   The humic acid or a content thereof is a reaction product of juvenile charcoal and nitric acid and / or sulfuric acid, according to claim 1 or 2,   The young soil charcoal according to claim 4, wherein the young charcoal is grass and / or lignite.   The water-soluble magnesium salt is at least one selected from magnesium sulfate, magnesium nitrate, magnesium chloride and magnesium acetate.   The basic clay-containing material according to any one of claims 2 to 6, wherein the basic magnesium-containing substance is at least one selected from magnesite, magnesia, dolomite, serpentine, magnesium silicate, and magnesium hydroxide. .   The content of water-soluble magnesium in the maternal fertilizer is 1 to 15% by mass as magnesium oxide.   The average particle size of a bituminous fertilizer is 1-5 mm, The mouldy fertilizer in any one of Claims 1-8 characterized by the above-mentioned.   A method for producing a bitter fertilizer, characterized by adding a water-soluble magnesium salt to natural humic acid or a content thereof and granulating it in a water-containing state.   A method for producing a bitter fertilizer, characterized by adding a basic magnesium-containing substance to natural humic acid or a content thereof and neutralizing it, and then adding a water-soluble magnesium salt and granulating it in a water-containing state.   A method for producing a bitter fertilizer, characterized by adding a water-soluble magnesium salt to a reaction product of juvenile charcoal and nitric acid and / or sulfuric acid, and granulating it in a water-containing state.   After adding and neutralizing a basic magnesium-containing substance to the reaction product of juvenile charcoal with nitric acid and / or sulfuric acid, adding a water-soluble magnesium salt and granulating it in a water-containing state Fertilizer manufacturing method.