KR101176985B1 - Method of release-controlled coating fertilizer with bulk blending for rice - Google Patents

Abstract

The present invention is i) olefin resin; Biodegradation induction resins such as starch; Preparing a coating composition by mixing a water-insoluble inorganic material with an organic solvent; ii) coating the first fertilizer and the second fertilizer with the coating composition, respectively; iii) bulk blending the first fertilizer and the second fertilizer, respectively coated in step ii). In addition, the present invention is an olefin resin; Biodegradation induction resins such as starch; Provided is an elution control coating fertilizer in which the first fertilizer and the second fertilizer, each coated with a mixed coating composition including a water-insoluble inorganic material, are bulk blended. The dissolution-controlled coating fertilizer according to the present invention replaces the fertilizer (air), eggplant (grain) and ear manure (defense) fertilization of rice when cultivating rice, so that the composition of nitrogen-phosphate-potassium is 30-6- It is an eco-friendly coating fertilizer that can secure stable rice growth and reduce fertilization while processing 6-dissolution-controlled fertilizer once 500g per seedling. The new seeding method using the dissolution-controlled coating fertilizer of the present invention can be treated at the same time when sowing seed, it can be supplied to fertilizer during the entire growth period of rice by treatment on a single seeding.

Description

METHODS OF RELEASE-CONTROLLED COATING FERTILIZER WITH BULK BLENDING FOR RICE}

The present invention relates to a coating fertilizer of the elution control granular formulation type and a method for producing the same. The present invention also relates to a use and a method of using the dissolution control granular mixing type coating fertilizer as a seed treatment agent.

Intensive agriculture, which is based on the use of chemical fertilizers and synthetic pesticides, contributed to food production. However, excessive use of chemical fertilizers caused environmental problems such as river water pollution.

Recently, with increasing domestic and foreign interest in safe food consumption and sustainable development, the demand for eco-friendly agriculture that can produce eco-friendly agricultural products is increasing day by day. As a result, Korea is pursuing a policy to reduce the use of chemical fertilizers. On Jan. 29, 2009, the National Competitiveness Council on “Reinforcement of Agricultural Competitiveness” reduced 35% compared to 2007 (340kg / ha / 221kg / from 2007). ha / 2012) and the recent rapid aging of rural labor force, the interest in growing cultivation technology to cope with the quantitative and qualitative reduction of labor force is increasing.

The general fertilization method for rice cultivation has been performed by a series of mining systems consisting of manure (rain), manure (soil) and ear manure (defense) due to the difficulty of fertilizer supply throughout the whole growing season. In such a system, a large amount of chemical fertilizers applied to paddy fields are partially absorbed by rice, and the remainder remains in soil or flows out of arable land, causing river eutrophication. It is also true that a number of conventional mining systems require significant farming efforts.

This paper examines the direction of agricultural policy and the future direction of domestic and foreign future farming, and fertilizers that can maximize the utilization efficiency of the applied fertilizers in order to reduce the input labor and chemical fertilizer usage in rice cultivation, which are important domestic grains. The development and improvement of fertilization methods is essential.

In addition, in the case of the previously released dissolution control coating fertilizer, the dissolution control type coating urea fertilizer is mixed with general chemical fertilizer to replace the fertilizer + powder ratio + defensive splitting system with one-time treatment on the soil. Due to the comparison appears to have a problem that cannot be used.

In order to reduce the input labor and the use of chemical fertilizers in the cultivation of rice, it is essential to develop fertilizers and improve fertilizer method to maximize the utilization efficiency of the applied fertilizers. Through this, there is an urgent need to establish an optimal fertilization system and to simplify the labor force to establish low input eco-friendly rice cultivation technology.

On the other hand, the conventional fertilization method is to treat the fertilizer evenly throughout the entire answer to the fertilizer to treat the crop and other crops where the plant is not planted to be consumed by the weeds generated in the answer or volatilized by chemical reaction It will dissolve and disappear along water. In order to overcome this problem, a method has been developed to measure the fermentation fertilizer of NPK compound fertilizer mixed with NPK compound fertilizer.However, this method is also used to mix seed urea fertilizer with NPK compound fertilizer. In the case of the treatment, the general chemical fertilizer (NPK compound fertilizer) due to the rapid leaching of compared to rice has a problem that appears.

The present invention has been made in order to solve the above problems, while replacing the base manure (air) and manure (malial rain), ear manure (defense) application of rice when cultivating rice seedlings, but stable treatment once seed sowing The present invention has been completed by manufacturing a dissolution control type BB type rice seeding fertilizer which can secure growth and reduce fertilization amount.

It is an object of the present invention to provide a method for producing a coating fertilizer of the elution controlled bulk blending type.

Another object of the present invention is to provide a coating fertilizer of the elution control granular formulation type.

It is another object of the present invention to provide a method for treating a coating fertilizer of an elution control granulation type.

In order to achieve the above object,

i) olefinic resins; Biodegradation resins such as starch; Preparing a coating composition by mixing a water-insoluble inorganic material with an organic solvent;

ii) coating the first fertilizer and the second fertilizer with the coating composition, respectively;

iii) bulk blending the first and second fertilizers respectively coated in step ii),

Provided is a method for producing a dissolution control coated fertilizer.

In one embodiment, the first fertilizer is urea and the second fertilizer is a complex fertilizer. However, the first fertilizer and the second fertilizer are not limited thereto, and include any combination of fertilizers that can be blended according to the purpose.

In step ii),

Although the coating conditions of a 1st fertilizer are not limited to this, Hot air temperature 60-80 degreeC; Concentration 5-7% of the coating composition; Covering time of 38-50 minutes is possible.

Also in step ii),

Although the coating conditions of a 2nd fertilizer are not limited to this, Hot air temperature 60-80 degreeC; Concentration 4-6% of coating composition; Cover time 47-61 minutes is possible.

In step ii),

The coverage of the first fertilizer and the second fertilizer is 9 to 20%.

In step ii),

The air sucked by the air suction device may be heated by a heat exchanger, the heated air may be passed through the porous tube to flow fertilizer particles, and the coating composition may be sprayed onto the fertilizer particles through a fluid nozzle to coat the fertilizer particles.

The dissolution control coated fertilizer prepared by the above method is not limited thereto, but the composition ratio of nitrogen: phosphate: potassium is 30: 6: 6.

The olefin resin is not limited thereto, but any one or more selected from the group consisting of polyethylene, ethylene vinyl acetate, polypropylene, and poly-4-methylpentene can be used.

The biodegradation inducing resin is not limited thereto, but the biodegradation inducing resin is a group consisting of polylactic acid (PLA), polyhydroxyalkanotate (PHA), poly (butylene succinate) PBS (polycaprolactone), starch, and natural degrading derivatives Any one or more selected from is possible.

The water-insoluble inorganic substance is not limited thereto, but may be one or more selected from the group consisting of talc, bentonite, ocher, diatomaceous earth, and carbon.

In step i),

The olefin resin is 30 to 80 parts by weight; Starch is 5-30 parts by weight; Water-insoluble minerals may be 10 to 70 parts by weight.

Also in step i),

The olefin resin may include 20 to 60 parts by weight of polyethylene and 10 to 20 parts by weight of ethylene vinyl acetate; Starch is 5-30 parts by weight; Water-insoluble minerals may be 10 to 70 parts by weight.

As another aspect of the present invention, the present invention is an olefin resin; Starch; Provided is an elution control coating fertilizer in which the first fertilizer and the second fertilizer, each coated with a mixed coating composition including a water-insoluble inorganic material, are bulk blended.

Moreover, as another aspect of this invention, this invention is olefin resin; Starch; Provided is a dissolution control seeded coating fertilizer in which a first fertilizer and a second fertilizer coated with a mixed coating composition including a water-insoluble inorganic material are bulk blended.

In addition, as another aspect of the present invention, the present invention provides a method for treating the dissolution-controlled coating fertilizer on rice seedling mother bed.

In addition, as another aspect of the present invention, the present invention provides a method for simultaneously treating the dissolution-controlled coating fertilizer at the time of seed sowing.

The dissolution-controlled coating fertilizer according to the present invention replaces the fertilizer (air), eggplant (grain) and ear manure (defense) fertilization of rice when cultivating rice. It is an eco-friendly coating fertilizer that can secure stable rice growth and reduce fertilization while processing 6-6 dissolution control fertilizer once 500g per seedling. In addition, the dissolution-controlled coating fertilizer of the present invention not only prevents the flow of paddy water into the river water and prevents the fertilizer component from being flown in the stream during the rice paddy drying process after treating the existing chemical fertilizer with manure (air). It is an eco-friendly coating fertilizer that prevents algae caused by elution of fertilizer components by coating. On the other hand, the new seeding method using the dissolution-controlled coating fertilizer of the present invention can be treated at the same time when sowing seed, and can supply fertilizer for the entire growing period of rice by treatment on a single seeding.

1 is a process diagram of a coating apparatus with a fluidized bed dryer used in the embodiment of the present invention.
2 is a seed treatment and seedling process of the seeding fertilizer of the present invention.
3 is a comparative graph of the dissolution difference between the urea and the seed fertilizer of the present invention, wherein the numbers described in the urea 15, 25, 35, and the seed phase 15, 25, and 35 refer to the elution test temperature, respectively.
4 is a graph of urea TN elution change of the present invention, wherein the numbers described in urea 15, 25, and 35 represent the elution test temperature, respectively.
FIG. 5 is a graph of change of the seeded fertilizer TN elution amount of the seeded fertilizer of the present invention, wherein the numbers described in the seeded phases 15, 25, and 35 refer to the elution test temperature, respectively.

Hereinafter, the components and technical features of the present invention will be described in more detail with reference to the following examples. However, the following examples are merely to illustrate the content of the present invention is not limited to the scope of the invention. The documents cited in the present invention are incorporated herein by reference.

Example

Example  1: Elution control granular formulation BB ) type Sowing  Preparation of Treated Coating Fertilizer

1-1. Covering Prescription and Covering Condition

division Embodiment 1 Embodiment 2 Example 1 Comparative Example 1 Element complex
Fertilizer Element complex
Fertilizer Element complex
Fertilizer Element complex
Fertilizer LDPE density % 36.99% 37.0% 37.0% 37.0% 37.0% 37.0% 37.0% 37.0% weight g 50.5 67.3 50.5 67.3 58.3 77.7 58.3 77.7 EVA density % 13.00% 13.0% 13.0% 13.0% 13.0% 13.0% 13.0% 13.0% weight g 17.7 23.7 17.7 23.7 20.5 27.3 20.5 27.3 TALC density % 41.98% 42.0% 44.0% 44.0% 44.0% 44.0% 42.0% 42.0% weight g 57.3 76.4 60.0 80.1 69.3 92.4 66.1 88.2 starch density % 8.0% 8.0% 6.0% 6.0% 6.0% 6.0% 8.0% 8.0% weight g 10.92 14.56 8.19 10.92 9.45 12.60 12.60 16.79 Pigment density % 0.03% 0.03% 0.03% 0.03% 0.03% 0.03% 0.03% 0.03% weight g 0.041 0.055 0.048 0.064 0.055 0.073 0.055 0.073 TOTAL density % 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% weight g 136.5 182 136.5 182 157.5 210 157.5 210 Amount of air weight g  1,500 2,000 1,500 2,000 1,500 2,000 1,500 2,000 Coating rate density % 9.1% 9.1% 9.1% 9.1% 10.5% 10.5% 10.5% 10.5%

Element: Granule type element (2 ~ 4mm)

Compound fertilizer: granule-type compound fertilizer (2 ~ 4mm)

LDPE: Low Density Polyethylene (MI (melt index) = 8, D = 0.916)

EVA: Ethylene Vinyl Acetate (MI = 2, D = 0.940, Vinyl Acetate Content = 18%)

Starch: Corn Starch

TALC: Talc (Average size: 10㎛)

Dye: Organic Pigment (Synthetic Pigment)

1-2. Coating process

The olefin-based (LDPE + EVA) resin, starch, and water-insoluble inorganics are mixed with an organic solvent (Tetrachloroethylene (TCE)) to have a solid content of 5%. The mixed coating composition was dissolved in a constant temperature stirring bath 6 by stirring at about 100 ° C. for about 1 hour to prepare a coating agent composition.

Next, the coating composition is applied to the fertilizer particles using a fluidized bed dryer as shown in FIG. 1 to prepare a fertilizer. The air sucked by the first air intake device 9 enters the inlet 1 and is heated by the heat exchanger 2. At this time, the amount of incoming air is controlled by the flow control device (3). The heated air passes through the perforated plate 4 and forms a unique air flow pattern, whereby fertilizer particles flow. The coating material of the thermostatic agitator 6 is moved through the pump 7, and the coating material is injected to the fertilizer particles flowing through the fluid nozzle 5. The sprayed coating material is coated on the surface of the fertilizer particles in the coating chamber 8 (upper inner diameter 350 mm, height 750 mm, suction inner diameter 150 mm). At this time, the coating temperature conditions are respectively T-1: 70 ℃, T-2: 60 ℃, T-3: 50 ℃, the intake air is lowered by the evaporation heat, discharged to the outlet (10). More specific distribution layer coating conditions are as follows.

Covering conditions First fertilizer (urea) coating When coating second fertilizer (composite fertilizer) Hot air flow 6 ~ 8m / s 8 ~ 10m / s Hot air temperature 60 ~ 80 ℃ 60 ~ 80 ℃ Fertilizer particles 2-4 mm 2-4 mm Fertilizer input 1.5 kg 2.0 kg Coating liquid concentration Solid content 6% (weight) 5% solids (weight) Coating liquid supply 100g / min 110g / min Cover time 38-50 minutes 47-61 minutes Coverage 9-20% 9-20%

After coating each of the urea and the compound fertilizer in the same way as described above, transfer to each storage bin and weigh a certain amount through the automatic weighing device (the first fertilizer and the mixing ratio may vary depending on the component amount of the second fertilizer). After the transfer to a rotary bin mixing device (Blender) was uniformly mixed to prepare a seeded treated coating fertilizer of the BB type of nitrogen-phosphate-potassium 30-6-6.

1-3. Dissolution Control Type BB type Sowing  Investigation of Dissolution of Treated Coating Fertilizer

To determine the dissolution of each prescription, put 12.5g of BB fertilizer of each prescription in 250ml of distilled water at 25 ℃ and collect 1ml of distilled water by date.Kjeltec analyzer Elution amount was measured.

In rice, the general system of seeding is 30-40 days after seeding, after seeding, before the transfer to Gibi (manure), and after the transfer of powdery manure (dried manure) to 15-20 days, and the transfer of defense (grip manure). After each treatment about 60 days. Accordingly, the dissolution degree of the dissolution control type BB type seed treatment coating fertilizer of the present invention should not be eluted for at least 30-40 days and lasted for at least 40 days. The fertilizer component was eluted too early as 20 days and 30 days, and Comparative Example 1) was similar to Example 1), but the initial dissolution rate was a little faster, and thus, the effect test of the present invention based on Example 1) was described in detail. Explain.

Example  2: dissolution control type BB Type of fertilizer Sowing  Biological Effect Test by Treatment

end. Rice Varieties: Chu Cheung Rice

I. Seed sowing (Mon./Sun): 4.24 days

All. Yiang (Mon.Sun) and Yiang Distance: 5.20days, 30 × 14cm

la. Soil before Test

  1) Soil Chemical Properties

pH
(1: 5) OM
(g kg ^-1 ) Av.P ₂ O ₅
(mg kg ^-1 ) Ex.Cations (cmol kg ^-1 ) Av.SiO ₂
(mg kg ^-1 ) CEC
(cmol kg ^-1 ) K Ca Mg Na 6.2 16 65 0.29 5.4 1.3 0.30 108 12.3

  2) Processing contents

Processing contents Fertilizer input (kg 10a ^-1 ) Rubbing Control group
Soil Black NP ₂ O ₅ -K ₂ O = 9.6-3.5-3.7
(2.7: 1.0: 1.1) N: 3 times, P ₂ O ₅ : total volume ratio
K ₂ O: 2 minutes Experimental Example 1 Fertilizer of Example 1
0 g / seedling box NP ₂ O ₅ -K ₂ O = 0.0-0.0-0.0 Chubby: None Experimental Example 2 Fertilizer of Example 1
200 g / seedling box NP ₂ O ₅ -K ₂ O = 1.8-0.36-0.36 Experimental Example 3 Fertilizer of Example 1
300 g / seedling box NP ₂ O ₅ -K ₂ O = 2.7-0.54-0.54 Experimental Example 4 Example 1
400 g / seedling box NP ₂ O ₅ -K ₂ O = 3.6-0.72-0.72 Experimental Example 5 Fertilizer of Example 1
500 g / seedling box NP ₂ O ₅ -K ₂ O = 4.5-0.9-0.9

At this time, the fertilizer, seed treatment method of Example 1: To give a fertilizer equivalent amount of Example 1 to the water-melting soil, sowing the seeds were seeded in a thermal insulation nail seat.

<Preliminary test: In answer  grave Seedling days  Fertilization reaction>

end. Building by seedling days

Processing contents Seedling 15th Tomb 20 days 25 days 30 days Building
Indices Control group 100
(1,271kg 10a ^-1 ) 100
(1,275) 100
(1,291) 100
(1,393) Experimental Example 1 76 75 82 73 Experimental Example 1 80 81 86 77 Experimental Example 2 85 90 92 84 Experimental Example 3 92 95 101 97 Experimental Example 4 95 99 102 102

I. Nitrogen Absorption Utilization Rate by Days of Planting (%)

Processing contents Seedling 15th Tomb 20 days 25 days 30 days Rice quantity
Indices Control group 33 40 24 41 Experimental Example 2 44 38 34 20 Experimental Example 3 41 66 43 36 Experimental Example 4 56 63 55 72 Experimental Example 5 63 70 51 84

All. Rice Yield by Seedling Days (kg 10a ^-1 )

Processing contents Seedling 15th Tomb 20 days 25 days 30 days Rice quantity
Indices Control group 100
(511kg 10a ^-1 ) 100
(518) 100
(528) 100
(569) Experimental Example 1 80 74 83 74 Experimental Example 2 84 81 90 75 Experimental Example 3 85 90 92 82 Experimental Example 4 86 91 97 96 Experimental Example 5 92 97 98 98

D. Weight and Nutrient Content of Building Seedling Days

In the building, the number of seedlings increased as the number of days increased, and in the 15 and 20 days seedlings, the amount of fertilizer of Example 1 increased by more than 200 g of fertilizer. When it is high.

The content of TN, P ₂ O ₅ , K ₂ O decreased as the number of seedling days increased, and the TN content increased with increasing fertilizer application of Example 1 for all 15, 20, and 30 day seedlings, and P ₂ O ₅ , K ₂ O The content increased with increasing fertilizer dosage of Example 1 in 15-day seedlings, but decreased in 20-day and 30-day seedlings.

hemp. Fertilization response by seedling seedling days

The fertilizer application level per seedling box in which the rice harvester building and rice yield by soil seeding day was comparable with the soil test was 500g in 20-day seedlings and 400g in 25- and 30-day seedlings. When using 500g showed a high tendency.

〈Main Exam: In answer Grave (25 Days tomb)

1) Changes in Rice Growth

Processing contents Extra long (cm) Minutes (number / week) 30 days after transplant 60 days 30 days after transplant 60 days Control group 36.4 67.7 12.9 17.5 Experimental Example 1 33.6 61.5 9.5 13.9 Experimental Example 2 34.7 65.6 11.2 16.2 Experimental Example 3 36.2 65.8 12.5 16.9 Experimental Example 4 36.4 67.3 13.3 17.6 Experimental Example 5 36.7 69.2 13.6 18.8

2) Changes in Rice Plant Building (kg10a ^-1 )

Processing contents Yianghu
15th 30 days 45 days 60 days 110 days harvest Straw grain system Control group 10.4 52 163 453 1,005 658 553 1,211 Experimental Example 1 5.6 32  99 315 770 530 448 978 Experimental Example 2 7.8 40 120 361 878 577 476 1,053 Experimental Example 3 8.6 45 136 415 934 594 494 1,088 Experimental Example 4 10.5 53 162 469 997 637 527 1,164 Experimental Example 5 10.9 55 179 485 1,027 655 548 1,203

3) Changes in carbon absorption of rice plants (kg10a ^-1 )

Processing contents Yianghu
15th 30 days 45 days 60 days 110 days harvest Straw grain system Control group 5.1 26 79 222 499 320 304 624 a Experimental Example 1 2.8 15 47 154 385 259 246 505 d Experimental Example 2 3.8 20 57 176 437 283 262 545 c Experimental Example 3 4.3 22 65 203 465 289 270 559 c Experimental Example 4 5.2 26 77 230 497 310 288 598 b Experimental Example 5 5.4 27 85 237 512 319 302 621 ab

4) Rice plant CO ₂ fixed amount change (kg10a ^-1 )

Processing contents Yianghu
15th 30 days 45 days 60 days 110 days harvest Straw grain system Control group 19 94 288 813 1,831 1,175 1,116 2,291 a Experimental Example 1 10 56 172 566 1,411 950 903 1,853 d Experimental Example 2 14 72 210 644 1,601 1,036 959 1,995 c Experimental Example 3 16 81 238 744 1,705 1,061 990 2,051 c Experimental Example 4 19 94 284 844 1,822 1,138 1,056 2,194 b Experimental Example 5 20 98 312 870 1,877 1,171 1,106 2,277 ab

5) Quantity Components and Rice Quantity

Processing contents Sorghum
(recast) Allowance
(dog) Ripening rate
(%) Brown rice natural grain
(g) Rice quantity
(kg 10a ^-1 ) Control group 17.6 76.6 92.8 20.9 509 a Experimental Example 1 12.2 66.7 93.6 21.4 412 e Experimental Example 2 15.1 73.3 93.0 21.0 438 d Experimental Example 3 15.8 74.8 92.6 20.8 454 c Experimental Example 4 16.9 76.0 92.3 21.0 485 b Experimental Example 5 17.4 76.9 92.2 20.8 504 a

6) Rice Taste

Processing contents protein
(%) Perfect percentage
(%) Toyo Meal Control group 6.4 91.8 74.6 Experimental Example 1 6.1 95.3 76.8 Experimental Example 2 6.1 95.5 74.5 Experimental Example 3 6.1 94.4 75.2 Experimental Example 4 6.4 94.8 73.0 Experimental Example 5 6.4 93.4 69.3

The fertilizer application capacity of Example 1, in which the growth of rice, etc., was equivalent to that of the control group, was 400 g, and the fertilizer application level of Example 1, which was equivalent to dry matter, carbon absorption, and CO ₂ fixed amount during the growing period of the control group, was 400 g. In harvesting season, it was comparable when using 500g. The fertilizer dosage of Example 1, which was similar in rice yield to the control, was 400-500 g.

On the other hand, the complete ratio was slightly higher when using the fertilizer of Example 1 than the control, the protein content of the fertilizer 400 ~ 500g application of Example 1 was the same as the control.

While the present invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. You will know. In addition, many modifications may be made to adapt a particular situation and material to the teachings of the invention without departing from the essential scope thereof. Accordingly, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention be construed as including all embodiments falling within the scope of the appended claims.

1: inlet 2: heat exchanger
3: flow control device 4: porous pipe
5 fluid nozzle 6 constant temperature stirring tank
7 pump 8 cover chamber
9 air intake device 10 outlet

Claims (5)

i) 20 to 60 parts by weight of polyethylene; 10-20 parts by weight of ethylene vinyl acetate; 5-30 parts by weight of starch; Preparing a coating composition by mixing 10 to 70 parts by weight of talc with an organic solvent;
ii) coating urea and composite fertilizer with the coating composition, respectively;
iii) bulk blending the respective coated urea and complex fertilizer in step ii),
The coating condition of the urea is hot air temperature of 60 to 80 ° C; Concentration 5-7% of the coating composition; Covering time 38-50 minutes, Coverage 9-20.0%,
Coating conditions of the compound fertilizer is hot air temperature 60 ~ 80 ℃; Concentration 4-6% of coating composition; Covering time 47-61 minutes, 9-20% coverage,
The composition ratio of nitrogen: phosphate: potassium is 30: 6: 6,
A method of producing a dissolution controlled rice seed coating fertilizer. The method of claim 1,
In step ii),
Evaporation control type, characterized in that the air sucked by the air suction device is heated by a heat exchanger, the heated air is passed through the porous pipe to flow the fertilizer particles and then sprayed coating the coating composition to the fertilizer particles through a fluid nozzle, dissolution control type Method of manufacturing rice seed coating fertilizer. 20 to 60 parts by weight of polyethylene; 10-20 parts by weight of ethylene vinyl acetate; 5-30 parts by weight of starch; The urea and the compound fertilizer coated with the mixed coating composition including 10 to 70 parts by weight of talc are bulk blended, and the coating ratio of the urea and the compound fertilizer is 9 to 20%. Dissolution-controlled rice seeding cover fertilizer, characterized by a ratio of 30: 6: 6. A method of treating the dissolution-controlled rice seed coating fertilizer of claim 3 with the sowing at the time of rice seed sowing. A rice seed coating fertilizer according to claim 3, wherein the dissolution control type rice seed coating fertilizer is treated with 500 ~ 600g per seedling during seeding.

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