KR101176979B1 - Preparation method of release-controlled coating fertilizer with bulk blending for growing rice - Google Patents

Abstract

The present invention is i) olefin resin; Biodegradation induction resins; Water insoluble minerals; And mixing the surfactant with the organic solvent to prepare a coating composition. 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; Water insoluble minerals; And a dissolution-controlled coating fertilizer in which the first fertilizer and the second fertilizer respectively coated with the mixed coating composition including the surfactant are bulk blended. The dissolution-controlled fertilizer according to the present invention replaces the fertilizer (air) and eggplant (malial) fertilizers of rice plants in rice cultivation, and seedlings of the dissolution-controlled fertilizer having 30-4-6 of nitrogen-phosphate-potassium in the seedlings. It is an eco-friendly coating fertilizer that can secure stable rice growth and reduce fertilization while processing 300g per one time. In addition, the dissolution-controlled coating fertilizer of the present invention covers all fertilizer components as well as the effect of preventing paddy water from flowing into the river water to become a river water pollutant during the rice paddy drying process to treat the existing chemical fertilizer with manure (air). It is an environmentally friendly covering fertilizer that prevents algae caused by the elution of fertilizer components. On the other hand, the new fertilization method using the dissolution-controlled coating fertilizer of the present invention is effective to reduce the amount of manure (air) and manure (meal ratio) applied to the existing answer, more than 60% (based on the active ingredient) and labor saving more than 70% It is an effective rice fertilization method that can be expected.

Granular Blending, Elution Control Coating Fertilizer, Seedling Agent

Description

Preparation method of release-controlled coating fertilizer for hair-growing rice cultivation {Preparation method of release-controlled coating fertilizer with bulk blending for growing 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 blended coating fertilizer as a seedling 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 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 dividing system with one-time treatment on soil. Due to this appears to have problems 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, in order to invent fertilizers with innovatively reduced throughput on seedlings, the preparation of high-density fertilizers in the form of particulates should be prioritized, but the manufacturing cost is high for the production of mono-type high-density fertilizers due to the difficulty of conventional fertilizer production. It takes a lot of time, and a lot of time and effort is required in the manufacturing process, there is a need for improvement.

In addition, the conventional fertilization method is to treat the fertilizer evenly throughout the answer to the fertilizer is processed even where the crops and other crops are not planted, is consumed by the weeds generated in the answer or volatilized through a chemical reaction in the answer It will dissolve and disappear along water. In order to overcome this problem, a method of measuring and fertilizing a slow-acting fertilizer in which NPK composite fertilizer is mixed with coating urea has been developed and used, but this is also treated by mixing coating urea fertilizer with general chemical fertilizer (NPK compound fertilizer). In the case of the general chemical fertilizer (NPK compound fertilizer) due to the rapid elution has a problem appearing compared to rice.

The present invention has been made to solve the problems as described above, while replacing the manure (air) and manure (malial rain) application of the main answer during rice cultivation to secure a stable rice growth and reduce fertilization while processing once in seedlings The present invention was completed by producing a dissolution control type BB type seedling treatment agent coating fertilizer.

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 induction resins; Water insoluble minerals; And mixing the surfactant with the organic solvent to prepare a coating composition.

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 70-80 degreeC; Concentration of coating composition 2-6%; 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 60-70 degreeC; Concentration 4-6% of coating composition; Cover time 47-61 minutes is possible.

In step ii),

The coverage of the first fertilizer is 10.0 to 20.0%, and the coverage of the second fertilizer is 12.8 to 16.8%.

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: 4: 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 PLA (poly lactic acid), PHA (polyhydroxyalkanotate), PBS (poly (butylene succinate), PCL (polycaprolactone), starch and spontaneous degrading agent 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.

Although the said surfactant is not limited to this, Cationic, anionic, mixed ion, or nonionic surfactant is possible.

In step i),

The olefin resin is 30 to 80 parts by weight; Biodegradation induction resin 5 ~ 30 parts by weight; Water-insoluble minerals 10 to 70 parts by weight; And the surfactant may be 0.2 to 2 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; Biodegradation induction resin 5 ~ 30 parts by weight; Water-insoluble minerals 10 to 70 parts by weight; And the surfactant may be 0.2 to 2 parts by weight.

As another aspect of the present invention, the present invention is an olefin resin; Biodegradation induction resins; Water insoluble minerals; And a dissolution-controlled coating fertilizer in which the first fertilizer and the second fertilizer respectively coated with the mixed coating composition including the surfactant are bulk blended.

Moreover, as another aspect of this invention, this invention is olefin resin; Biodegradation induction resins; Water insoluble minerals; And a first fertilizer and a second fertilizer, each of which is coated with a mixed coating composition including a surfactant, and is bulk blended.

In addition, as another aspect of the present invention, the present invention provides a method of treating the dissolution-controlled coating fertilizer to rice hair growth mother plate.

In addition, as another aspect of the present invention, the present invention provides a method of treating the dissolution-controlled coating fertilizer before migration of the mother plate.

The dissolution-controlled fertilizer according to the present invention replaces the fertilizer (air) and eggplant (malial) fertilizers of rice plants during rice cultivation and seedlings of the dissolution-controlled fertilizer having 30-4-6 nitrogen-phosphate-potassium in the seedlings. It is an eco-friendly coating fertilizer that can secure stable rice growth and reduce fertilization while processing 300g per one time. In addition, the dissolution-controlled coating fertilizer of the present invention covers all fertilizer components as well as the effect of preventing paddy water from flowing into the river water to become a river water pollutant during the rice paddy drying process to treat the existing chemical fertilizer with manure (air). It is an environmentally friendly covering fertilizer that prevents algae caused by the elution of fertilizer components. On the other hand, the new fertilization method using the dissolution-controlled coating fertilizer of the present invention is effective to reduce the amount of manure (air) and manure (meal ratio) applied to the existing answer, more than 60% (based on the active ingredient) and labor saving more than 70% It is an effective rice fertilization method that can be expected.

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 Blend (BB) Type Seedling agent  Preparation of Cover Fertilizer

1-1. Covering Prescription and Covering Condition

Coating material mixing ratio division unit Embodiment 1 Embodiment 2 Example 1 Comparative Example 1 blood
complex
wife
room Element Compound fertilizer Element Compound fertilizer Element Compound fertilizer Compound fertilizer LDPE density(%) 28 28 44 44 Weight (g) 53.8 71.7 62.2 82.9 110.9 147.8 147.8 EVA density(%) 7 7 11 11 Weight (g) 13.4 17.9 15.5 20.7 27.7 37.0 37.0 BDP density(%) 15 15 15 15 Weight (g) 28.8 38.4 33.3 44.4 29 50.4 50.4 TALC density(%) 49 49 29 29 Weight (g) 94.4 125.8 109.2 145.5 73.5 98.0 98.0 Surfactants density(%) 0.8 0.8 0.8 0.8 Weight (g) 1.54 2.05 1.78 2.37 2.02 2.69 2.69 Pigment density(%) 0.03 0.03 0.03 0.03 Weight (g) 0.06 0.08 0.07 0.09 0.08 0.10 0.10 TOTAL density(%) 100 100 100 100 Weight (g) 192 256 222 296 252 336 336 Fertilizer Weight (g) 15,00 2,000 1,500 2,000 1,500 2,000 2000 Coverage % 12.8 14.8 16.8 16.8 Cover size Mm 1-2 1-2 1-2 1-2

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

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

BDP: Biodegradation Induction Resin

TALC: Talc (Average size: 10㎛)

Surfactant: Nonionic Surfactant (EO: 6, CP: 52 ℃)

Dye: Organic Pigment (Synthetic Pigment)

1-2. Coating process

The olefin-based (LDPE + EVA) resin, BDP, water-insoluble inorganics, and surfactant are mixed with an organic solvent (Tetrachloroethylene (TCE)) to have a solid concentration of 5%. The mixed film composition was dissolved in a constant temperature stirring bath 6 by stirring at about 100 ° C. for about 1 hour to prepare a film 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: 67 ℃, T-2: 60 ℃, T-3: 45 ℃, the intake air is lowered by the evaporation heat, discharged to the outlet (10). More specific distribution layer coating conditions are as follows.

Distribution layer covering condition Covering conditions First fertilizer (urea) coating When coating second fertilizer (composite fertilizer) Hot air flow 8 ~ 10m / s 6 ~ 8m / s Hot air temperature 70 ~ 80 ℃ 60 ~ 70 ℃ Fertilizer particles 1 to 2 mm 1 to 2 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 10-20% 12.8-16.8%

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 blender device was uniformly mixed to prepare a BB type seedling coating fertilizer of nitrogen-phosphate-potassium 30-4-6.

1-3. Dissolution Control Type BB Seedling agent  Investigation of Elution Degree of 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 separation system is airborne (manure) before the transfer, and the powdery rain (mantle) 15-20 days after transplanting, defense (grip) about 60 days after transplanting. Accordingly, the dissolution of the patented dissolution control type BB type seedling treatment coating fertilizer should be maintained for at least 40 days. However, in Examples 1) and 2), the fertilizer component was too early to have 90% dissolution. It was eluted, and Comparative Example 1) was similar to Example 1), but the initial dissolution rate was a little faster, so that Example 1) of this test was selected as the target prescription.

Changes in Elution Levels for Prescription of Fertilizers Temperature
Condition Prescription Nitrogen elution date (dissolution rate,%) 1 day 4 days 7 days 10 days 20 days 30 days 40 days 50 days 25 ℃ Embodiment 1 0.2 18.0 27.6 55.6 92.8 92.9 94.5 98.9 Embodiment 2 0.3 12.9 22,1 29.9 79.9 92.8 97.3 99.3 Example 1 0.1 5.4 9.7 10.5 42.5 59.0 72.6 79.2 Comparative Example 1 3.0 8.4 13.2 16.9 48.8 69.2 77.6 88.4

Hereinafter, the effect test of the present invention based on Example 1 will be described in detail.

Example  2: Dissolution Control Type BB Seedling agent  Covering fertilizer To seedling processing  According Creature Effect test

2-1. Test variety: Cheongpyeong

2-2. Processing contents

(1) Soil Test Application Practice )

Based on the standard cultivation method of the Gyeonggi-do Agricultural Research and Extension Services, the fertilization amount was determined after analyzing the chemical characteristics of the soil before the test as shown in Table 4, and the fertilizer content 73kg / ha [Nitrogen (N) 50.5kg / ha, phosphoric acid (P ₂ O ₅ ) 17kg / ha, girly (K ₂ O) 5.5kg / ha] was treated, 15 days after transplanting to the nitrogen (N 20 kg / ha and 32 kg / ha (nitrogen (N) 30.5 kg / ha, girly (K ₂ O) 1.5 kg / ha), respectively, at 60 days after transplanting.

(2) application amount ( Example  1 prescription use)

Elution-controlled seedling fertilizer with a composition of 30% nitrogen (N), 4% phosphoric acid (P ₂ O ₅ ), and 6% girly (K ₂ O) was placed in 300 boxes of seedling boxes 2kg, 3kg, 4kg and 5kg, respectively. after treatment were transplanted to transplanting machine has 300 boxes per ha, ratio (Isaac manure) from 60 primary 32kg / ha [nitrogen (N) 30.5kg / ha, point (K ₂ O) in the after transplanting, such as black soil fertilizing 1.5 kg / ha] were treated separately.

Soil Chemical Properties Before Test pH
(1: 5) OM
(g / kg) Av.P ₂ O ₅
(mg / kg) Ex. Cat. (Cmol ⁺ / kg) CEC
(cmol ⁺ / kg) SiO ₂
(mg / kg) K Ca Mg 6.1 21.6 83 0.38 7.39 1.40 13.14 164

※ Test application amount: N-10.1, P ₂ O ₅ -1.7, K ₂ O-0.7 kg / 10a

2-3. Effect on Rice Growth, Yield and Rice Quality

(1) Effect on the growth of rice

30% of standard fertilizer (practice), nitrogen (N), and phosphoric acid (P) through soil testing during the peak season of rice growth (Table 5), water flow rate (Table 6), water extraction (Table 7), and maturation (Table 8). ₂ O ₅ ) After dissolution control type seedling fertilizer of 4% and ₂ % of K ₂ O was treated with 300kg of seedlings, 2kg, 3kg, 4kg and 5kg, The result of comparing rice growth is as follows.

Growth of the fine grinder process
(g / seedling box) Super long sheet (cm) Minutes (number / week) SPAD Average C.V (%) Average C.V (%) Average C.V (%) 200 39.9 ± 2.4 5.9 20.0 ± 4.0 20.1 33.9 ± 1.6 4.8 300 40.8 ± 1.7 4.3 22.0 ± 3.8 17.2 33.6 ± 2.0 6.0 400 41.4 ± 2.2 5.2 23.6 ± 4.7 19.8 34.6 ± 1.7 5.0 500 42.1 ± 2.0 4.7 24.7 ± 5.1 20.8 34.6 ± 2.4 7.0 Standard time zone
(Practice) 43.8 ± 2.0 4.6 23.7 ± 5.9 24.8 32.6 ± 2.0 6.1

Growth comparison in the lactating phase process
(g / seedling box) Super long sheet (cm) Minutes (number / week) SPAD Average C.V (%) Average C.V (%) Average C.V (%) 200 67.4 ± 2.0 3.0 18.4 ± 3.2 17.2 29.1 ± 2.6 8.9 300 68.1 ± 2.8 4.0 20.6 ± 3.5 17.2 29.0 ± 2.0 6.7 400 69.7 ± 1.8 2.5 21.5 ± 3.0 14.0 29.4 ± 1.7 5.9 500 71.2 ± 2.6 3.7 21.7 ± 3.8 17.6 29.9 ± 2.0 6.6 Standard time zone
(Practice) 69.6 ± 3.3 4.9 20.1 ± 4.3 21.6 27.7 ± 2.0 7.4

Growth comparison of extracting season process
(g / seedling box) Super long sheet (cm) SPAD Average C.V (%) Average C.V (%) 200 101.5 ± 4.0 3.9 32.1 ± 1.2 3.7 300 102.3 ± 2.7 2.6 32.3 ± 1.5 4.7 400 104.4 ± 2.7 2.6 32.5 ± 1.1 3.4 500 106.7 ± 3.0 2.8 32.9 ± 1.6 4.7 Standard time zone
(Practice) 102.4 ± 2.4 2.4 31.7 ± 1.4 4.6

Growth comparison in maturity process
(g / seedling box) Soy Sauce (cm) stripe
(cm) Sorghum SPAD Average C.V (%) Average C.V (%) 200 78.8 ± 3.2 4.1 19.4 ± 1.0 15.3 ± 2.3 14.9 30.0 ± 1.7 300 79.7 ± 2.8 3.5 19.0 ± 1.0 16.4 ± 2.7 16.4 30.3 ± 1.7 400 82.2 ± 2.7 3.2 19.5 ± 1.0 16.7 ± 2.4 14.5 30.7 ± 1.6 500 83.8 ± 2.6 3.2 19.5 ± 1.0 17.4 ± 3.1 17.6 30.9 ± 2.0 Standard time zone
(Practice) 80.2 ± 2.6 3.2 19.0 ± 1.0 15.9 ± 2.8 17.7 29.6 ± 1.7

A) The maximum grinder length was shorter in seedling treatment than 43.8cm in standard application period, and was less than 300g per seedling in SPAD value, which was indicative of grain number and chlorophyll content, but was higher than that in 400g and 500g treatment.

B) The length of water and the hard water was low at 200g per seedling, and it was comparable to the standard fertilization (practice) at 300g. At 400g and 500g per seedling, the hard water was more than the standard fertilization (practice), and the SPAD value was higher than Was high in all treatments.

C) The height of the extractor increased as the throughput per seedling increased, which was smaller than the standard application in the 200g treatment, but increased in the 400g and 500g in the 300g treatment.

D) Soybeans matured as the extractor increased as the throughput increased, which was smaller than the standard fertilization (standard) in 200 g treatment, and larger than the standard fertilization in 400 g and 500 g treatment. In addition, the number of rice grains per week increased as the throughput per seedling increased, which was 15.3 in 200g treatment per week, which was smaller than 15.9 / week in standard fertilization, but 16.4 in 300g, 400g, and 500g treatments, respectively. 16.7 / week, 17.4 / week, more than the standard time zone.

In addition, the SPAD value indicating the chlorophyll content was higher than the standard fertilization rate (all practice) in all the seedling treatment agents. Even though the fertilizer amount was drastically reduced, it was found that there was no shortage of fertilizer as the dissolution controlled seedling treatment agent was treated only in the rice root layer.

E) In conclusion, dissolution-controlled seedling fertilizer showed a growth similar to that of standard fertilizer at the 300g / box treatment. In particular, the maximum handing and the number of handings were smaller than those of the standard fertilizer (standard), and the standard fertilizer (traditional) was rapidly grown by giving a general chemical fertilizer for Gi and fertilization As the fertilizer component of the elution-controlled seedling fertilizer was gradually eluted, the height and the number of grains were decreased at the maximum season, but the soy was similar during the maturation period by continuously supplying fertilizers to the crops. In the practice of standard fertilization, the maximum number of grains per week was 23.7, but the number of grains per week during maturity was 15.9, and about 32.9% of the highest grains became invalid grains, but 300 g of seedling fertilizer was treated with seedling fertilizer. In 22, the number of peaks per week was 22, which was less than the standard practice (23.7). Sorghum is 16.4 dogs, showed that not only were many more than the 15.9 Time acetabulum (practices) approximately 25.5% of the highest tillering tillering does not bear the change and invalidate the rice al improving the effective tillers of about 7%.

(2) Effects on Rice Yield Components and Yield

As shown in Table 9, the results of analyzing the yield component, number of grains per ㎡, number of grains per ㎡, ripening rate, grain weight, sine ratio and quantity per 10a, which are the quantity components of rice between standard fertilizer (practice) and dissolution control type seedling fertilizer treatment, It looks like this:

Components and Quantity process
(g / seedling box) Number of square meters Allowance
(Lip) ㎡ (grain) Ripening rate
(%) In the sky
(g) Sine rain
(%) White rice quantity
(kg / 10a) 200 325 98 31,850 94.6 22.1 83.6 539 300 348 95 33,060 94.9 22.3 83.7 554 400 354 98 34,692 95.2 22.0 83.8 556 500 369 92 33,948 94.0 22.1 83.5 565 Standard time zones (practice) 337 93 31,341 94.9 22.4 83.4 521

A) In sorghum per ㎡, which had the greatest effect on yield, it increased as the throughput of dissolution control type seedling fertilizer increased, which was higher than the standard application rate when more than 300g per seedling was treated. This is because, as in the above-mentioned rice growth investigation, the effective mudification was made when fertilizing the elution control type seedling fertilizer.

B) 수 Other number of allowance, number of m², ripening rate, natural weight, and sine ratio showed some differences, but the difference was not large.

3) The yield increased as the fertilizer content of the dissolution control seedling treatment agent increased, and it was higher than the standard fertilizer (practice) even when 200 g of the dissolution control seedling treatment agent was treated per seedling.

In particular, the 300g per seedling selected in the rice growing survey showed that the yield per 10a was 554kg, which was about 6% higher than the standard weight of 521kg.

(3) Comparison of Quality Characteristics of Rice

As shown in Table 10, the quality characteristics of the rice in the white rice between standard fertilizer (practice) and dissolution control type seedling fertilizer treatment were as follows.

White Rice Quality Characteristics process
(g / seedling box) White rice grade (%) Amylose
(%) protein
(%) White peach Food Complete Wrap Powdery matter Damage Heat loss 200 96.7 2.0 1.0 0.3 0.0 18.6 6.0 36.6 79.7 300 96.2 2.4 1.1 0.2 0.0 18.7 6.1 36.2 78.3 400 95.9 2.3 1.5 0.3 0.0 18.7 6.1 36.6 76.2 500 96.1 2.2 1.2 0.5 0.1 18.9 6.4 36.3 76.0 Standard time zone
(Practice) 95.2 3.1 1.3 0.4 0.0 18.4 6.0 36.7 76.8

A. As a result of grasping the ratio of important complete ratio of appearance characteristics in rice, the dissolution control type seedling treatment fertilizer was higher than standard fertilization (standard), and the ratio of complete fineness was 96.2% in 300g treated seedlings. 15.2% of fertilizer was increased to 95.2% of the practice, indicating that the seedling treatment cost increased the overall quality of rice.

B) Both amylose content and protein content to determine the taste of rice did not affect the taste quality by satisfying amylose content less than 20% and protein content less than 7%.

C) The lower the dissolution-controlled seedling fertilizer throughput was, the better the taste, taste, and taste were, and 78.3 in seedling-treated fertilizer at 300 g per seedling. Higher.

2-4. Fertilization reduction and fertilization labor comparison test

(1) reduced fertilization

Table 11 shows the reductions in fertilization with standard fertilizers per practice (habit) and seedling treatment fertilizers with dissolution-controlled seedling fertilizers (300g per seedling) and 300 boxes per ha.

Reduced fertilizer amount [component amount (converted fertilizer amount)] (kg / ha) division system Gibi (base) Powdery rain Defense (grip) Standard time zones (practice) 125 (317) 73 (203) 20 (44) 32 (70) Nursery processing 300 68 (160) 36 (90) 0 (0) 32 (70) % Savings △ 45.6 (49.5) △ 61.3 (63.6) 0 (0)

※ The amount of fertilization (based on the amount of ingredients) was 61.3% lower than the practice based on the ratio of Gibi + Meal.

A) Standard fertilizer (common practice), which is a general chemical fertilizer, is based on the fertilization rate of fertilizer (base manure), before fertilization, 73 kg / ha [nitrogen (N) 50.5kg / ha, phosphoric acid (P ₂ O ₅ ) 17kg / ha, Girly (K ₂ O) 5.5kg / ha], and treated with 20kg / ha of nitrogen (N) with powdered rain (dust) on the 15th day after transplanting / ha treatment, but the dissolution control type BB type seedling treatment coating fertilizer of this patent is 30-4-6% of the composition of nitrogen-phosphate-potassium and 300g per seedling to transfer 300g per ha, so it is processed per ha The effective amount is 36kg [0.3kg (measuring seedlings) x 0.4 (total active ingredient) x 300 (number of rice seedlings per ha) = 36kg], replacing the existing abrasion (manure) and powder (rain). As a result, the amount of active fertilizer was reduced by about 61.3%.

2) In the reduction of the overall fertilizer consumption in the growth of rice, the fertilizer reduction effect was about 45.6% as standard fertilizer or dissolution control type BB type seedling treatment coating fertilizer was treated with the same amount of fertilizer.

(2) Reduction of application labor

Table 12 shows the reduction of fertilization labor with the seedling treatment fertilizer, which transfers 300 g / d of standard fertilizer (ha) and haze-controlled seedling fertilizer per ha after 300 g per seedling.

Fertilization labor force (human resources spreading time) comparison (time / ha) division system Gibi (base) Powdery rain Defense (grip) Standard time zones (practice) 11.8 6.5 1.8 3.5 Nursery processing 300 6.0 2.5 0 3.5 % Savings △ 49.2 △ 69.9 0

※ The fertilization labor cost was reduced by 69.9% based on Gibi + Burial ratio.

A. The fertilization labor of standard fertilizer (standard), which is a general chemical fertilizer, is 6.5 hours / ha for airless manure and 1.8 hours for manure rain. It takes 8.3 hours / hark, but the dissolution control BB type seedling treatment coating fertilizer of this patent does not need to process the grain ratio as it replaces the air mass and the grain ratio. In addition, since the fertilizer treatment only needs to be processed on 300 seedlings, the fertilization labor can be reduced to 2.5 hours per ha, resulting in a 89% reduction in fertilization labor compared to the standard fertilizer, which is a common chemical fertilizer.

B) Defensive manure is not the same as standard fertilizer or dissolution control BB type seedling treatment coating fertilizer.

3) Overall, the fertilizer labor reduction is about 11.8 hours per ha for the standard application area (practice), but the dissolution-controlled BB type seedling treatment coating fertilizer takes about 6 hours, saving about 5.8 hours per ha, saving 49.2%. The efficiency of fertilizing labor was shown.

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 is a process diagram of a coating apparatus with a fluidized bed dryer used in the embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

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 biodegradable resin; 10 to 70 parts by weight of talc; And preparing a coating composition by mixing 0.2 to 2 parts by weight of the surfactant with an organic solvent. ii) coating urea and composite fertilizer with the coating composition, respectively; iii) bulk blending each of the coated urea and the compound fertilizer in step ii), The coating conditions of the urea are hot air temperature of 70 to 80 ° C; Concentration of coating composition 2-6%; Covering time 38-50 minutes, coverage 16.0-17.0%, Coating conditions of the compound fertilizer is hot air temperature 60 ~ 70 ℃; Concentration 4-6% of coating composition; Covering time 47-61 minutes, coverage 16.0-16.8%, The composition ratio of nitrogen: phosphate: potassium is 30: 4: 6, A method of producing a dissolution control rice fertilizer 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 A method of manufacturing coated fertilizer for rice hair growth. 20 to 60 parts by weight of polyethylene; 10-20 parts by weight of ethylene vinyl acetate; 5-30 parts by weight of biodegradable resin; 10 to 70 parts by weight of talc; And urea and composite fertilizer coated with the mixed coating composition including 0.2 to 2 parts by weight of the surfactant, respectively, and are bulk blended, the coverage of the urea is 16.0 to 17.0%, and the coverage of the composite fertilizer is 16.0 to 16.0%. A dissolution-controlled rice hair growth coating fertilizer, characterized in that 16.8%, the composition ratio of nitrogen: phosphate: potassium is 30: 4: 6. A method of treating the dissolution control type rice hair growth covering fertilizer of claim 3 to a rice hair growth bed. A method of treating the dissolution-controlled rice hair growth covering fertilizer of claim 3 before transfer of the mother plate.

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