KR100289095B1 - Nitrogen fertilizer composition for nitrogen supply and fertilizer composition supplying apparatus - Google Patents

Abstract

PURPOSE: A nitrogen fertilizer composition for the supply of nitrogen and a nitrogen fertilizer supply apparatus containing the composition are provided, whose nitrogen supply efficiency is maintained for 200-250 days constantly. CONSTITUTION: The nitrogen fertilizer composition comprises 10-45 wt.% of (NH4)2SO4; 10-45 wt.% of urea; 0.1-3 wt.% of dicyanoamide as a nitration inhibiting agent; and the balance of a binder. Preferably the binder is clay or gypsum. The apparatus is cylinder-shaped one whose upper and lower parts are open. Preferably the cylindrical apparatus is made of a biodegradable material comprising paper, and has additional layer(23) containing a plurality of holes(24) in the lower part. Optionally the apparatus comprises further a sand layer(25) or a diffusion buffering layer in the upper or lower part in addition to the nitrogen fertilizer composition layer(22).

Description

Nitrogen fertilizer composition for nitrogen supply and nitrogen fertilizer composition supply device comprising same {Nitrogen fertilizer composition for nitrogen supply and fertilizer composition supplying apparatus}

The present invention relates to a nitrogen fertilizer composition for supplying nitrogen and a nitrogen fertilizer composition supply device comprising the same. More specifically, the present invention provides a nitrogen fertilizer composition for supplying nitrogen, including yuan and urea as a source of ammonium nitrogen, nitrate inhibitors and gypsum or clay as a binder, and a nitrogen fertilizer composition comprising the nitrogen fertilizer composition. Relates to a device.

Vegetable crops such as tomatoes, cucumbers, bell peppers, melons, cabbages and cabbages generally have a high nutrient absorption capacity throughout the whole growing season. These vegetable crops also require intensive watering because of their high area productivity. The high nutrient uptake of vegetable crops, both in open-cultivation and in plant cultivation, is directly linked to yield. Vegetable crops are intensively grown and also for high yield and good quality. In order to achieve this purpose, the current trend is to over-use nitrogen fertilizer when growing vegetables.

In order to improve such conventional fertilization, various fertilizer technology improvement measures to adjust the fertilization effect of applied nitrogen fertilizer to crop growth by adjusting nitrogen fertilization amount and fertilization time to crop growth conditions are as follows. Has been implemented.

Application of Nitrogen Fertilizer by Soil Test

2. Improvement of fertilization technology (instead of frontal filling application or rowing application)

3. Input of slow nitrogen fertilizer

4. Improvement of the terms of service (duties = nutrient solution)

The application of a slow-release nitrogen fertilizer contains the simplest feasibility in reality.

While fast-acting fertilizers have a high loss rate, slow-acting (fermentative) fertilizers have the advantage that they can have a continuous fertilizing effect because fertilizers are slowly eluted in the soil for a long time. Therefore, there is no obstacle to the concentration of crops for fertilizers, the number of fertilizers can be reduced to a minimum, and viability is possible. This is because fertilizer consumption per unit area is the highest in the world (421 kg / ha), and nutrient disturbances are occurring in soil, and at present, Korea is developing and distributing such slow-release fertilizers. This situation is constantly being demanded.

Recently, the contents of the fertilizer technology development field were mainly pursued in the direction of environmental agriculture. R & D on the development and application effects of environment-friendly agricultural materials takes a great deal of weight, with an emphasis on fertilization management for proper production and high-quality agricultural production within a range that does not burden the environment. In the development of environment-conserving fertilizers for sustainable agriculture in Korea, R & D on the development of slow-fertilizers considering crop and soil nutrients is being actively promoted, and interest in the development of near-field cost fertilizers is increasing.

In Korea, slow-fertilizer fertilizer development mimicked US TVA products from 1972 to 1982, and the results of cultivation tests were recognized for domestically developed products, but they were not put to practical use due to lack of social opinion. From 1989 to 1993, the synthesis and coating technology of polymer materials was developed in the coating element development test using polymer materials. In addition, the urea resin synthesis method and composite fertilizer manufacturing method were developed by conducting the full-acting fertilizer test using urea resin. The cultivation test results for 12 crops, such as red pepper and Chinese cabbage, have been acknowledged to some extent, but farmers' complaints have been followed, such as the death of crops when the slow-release fertilizer is applied. In addition, we are currently importing Meister fertilizer for water cultivation from Japan into cultivation and testing. Also, we are developing fermented fertilizer using natural resin (Sinjin) researched and developed in Japan, USA and Germany as a binder. No progress has been made.

In particular, nitrogen fertilizers generally used in vegetable cultivation are fertilized, absorbed, and used in the form of fast-acting nitrogen nitrate.

Nitrogen is absorbed from plant roots, and is transported to the plant ground through water pipes by transpiration along with other cations such as calcium ions (Ca ²⁺ ) and stored in Vacuole, or stored in vacuoles. This reduction effect is converted to protein.

Ammonium, on the other hand, is absorbed at the tip of the plant roots and, at the same time, is absorbed and used immediately for protein metabolism or bound to carbohydrates and transported through the phloem to the plant leaf area in the form of amino acids or amides. Attracts.

In addition, ammonium nitrogen (NH ₄ ⁺ -N) is positively adsorbed on the surface of the negatively charged soil colloid and is not lost, whereas nitrogen nitrate (NO ₃ ^-- N) is chemically stabilized and is not lost in the soil. Most of the overused fertilizers do not react with chemicals and accumulate in the soil, causing an imbalance with other nutrients, causing salt impairment in the soil or being lost to flow into groundwater and contaminate groundwater. Cause problems of pollution. In addition, excessive absorption of vegetables with a high content of nitrogenous nitrates is known to be harmful to the human body, such as cyanosis, causing problems with the stability of agricultural products when cultivating vegetables based on nitrogenous nitrates.

The use of nitrogen nitrate as a source of nitrogen increases the growth of the upper part of the plant, whereas the use of ammonium nitrogen causes the plant to be close to the ammonium nitrogen supply area due to the attraction and toxicity of the plant roots. Many small roots have been found to form a special type of root system of entangled illusions.

On the other hand, coating-type slow release fertilizers have been developed and marketed to increase the sustained release of fertilizers and have a continuous fertilizing effect. However, this has a problem such as high cost of coating fertilizers and complicated production. When a resin is used as the coating agent, it is difficult to decompose under growing conditions of vegetables, and there is a problem of accumulating and lowering the quality of the soil to lower productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a nitrogen fertilizer composition for supplying nitrogen, which includes yuan and urea as a source of ammonium nitrogen, a nitrifying inhibitor and gypsum or clay as a caking agent. The nitrogen fertilizer composition may further include a diffusion buffer.

Another object of the present invention comprises a nitrogen fertilizer composition for the supply of nitrogen, including yuan and urea as a source of ammonium nitrogen, nitrate inhibitors and gypsum or clay as a caking agent, and at a low concentration by aging the ammonium nitrogen It is to provide a nitrogen fertilizer composition supply device capable of supplying plants over a long period of time.

1 is a side cross-sectional view schematically showing an example of use of an embodiment of a nitrogen fertilizer composition supply device according to the present invention.

Figure 2 is a side cross-sectional view schematically showing a use example of another embodiment of the nitrogen fertilizer composition supply apparatus according to the present invention.

Figure 3 is a side cross-sectional view schematically showing a use example of another embodiment of the nitrogen fertilizer composition supply device according to the present invention.

※ Explanation of code for main part of drawing

11: soil 12: seedlings

13: Seedling Cup 21: Container

22: nitrogen fertilizer composition layer 23: heat cleavage plate

24: hall 25: fourth floor

26: organic diffusion buffer layer 27: inorganic diffusion buffer layer

Nitrogen fertilizer composition according to the present invention, 10 to 45% by weight of yuan ((NH ₄ ) ₂ SO ₄ ) as a nitrogen source, 10 to 45% by weight of urea (CO (NH ₂ ) ₂ ), dicyandiamide as an oxidative inhibitor 0.1 to 3% by weight and the balance as a binder, characterized in that gypsum or clay is used as the binder.

Both yuan and urea are used as a source of ammonium nitrogen, which is different from conventional nitrogen nitrate, and have been used as a major nitrogen source, and can be purchased and used commercially by those skilled in the art. It is known enough.

In the above, the mixing ratio of yuan and urea as a nitrogen source is a value set so as to achieve sufficient ammonium (NH ₄ ) concentration to achieve a degree of minimizing ammonium toxicity upon mixing, and the soil is not acidified by supply of yuan, The amount was such that no accumulation of sulfate ions (SO ₄ ^2- ) occurred.

If urea is not controlled by hydrolysis, ammonium may be generated during hydrolysis, resulting in toxicity. Therefore, the urea content in the whole composition is particularly paying attention so as not to minimize toxicity and acidification as described above. The content of yuan and urea was determined.

In the present invention, by supplying ammonium as a nitrogen source, a special root system composed of many fine roots can be formed by supplying ammonium nitrogen fertilizer, and the nitrogen absorbed through the roots thus formed promotes plant growth. It turns out to work.

In particular, ammonium nitrogen fertilizers fertilized in high concentrations at the correct location allow the plants to control the uptake of ammonium nitrogen fertilizers used because of the toxicity of ammonium under high concentrations, while ammonium is responsible for the growth of plant roots. Because it attracts, plant roots overcome the gravity and grow only on the top of the fertilizer, forming a ring-shaped special type of root system.

Dicyandiamide as a nitrifying agent inhibits the accumulation of nitric acid in the soil by reacting with nitric acid, which may be produced by the nitrate as a nitrogen source or by the decomposition of urea. The weight percentage was adjusted to an amount suitable to inhibit the accumulation of nitric acid in response to nitric acid which can be released from the udders and urea.

Ammonium may be toxic at high concentrations of approximately 0.1 mM, but when continuously supplied to plants at low concentrations, ammonium promotes the growth of entangled plant roots, and actively absorbs nutrients through these plant roots. By doing so, it shows the excellence in the quantity of the crop. Therefore, in the present invention, the ammonium is slowly eluted by hydrolysis by the water absorption of the hyacinth and urea to prevent toxicity to the cultivated plant, and the ammonium is continuously eluted and diffused to be absorbed during the entire growth period of the plant. In order to be used, a binder was used.

Gypsum or clay may be preferably used as the caking agent. Gypsum, clay and other binders make it easy to coalesce the yuan, the urea and the dicyandiami to each other, and also slow the release rate of ammonium or nitric acid, which is a product from the yuan and urea as a nitrogen source, It has a role to make. The gypsum content may be included in the remaining amount such that the total composition is 100% by weight, including yuan as the nitrogen source, urea and dicyandiamide.

Nitrogen fertilizer composition according to the present invention as described above may further include by-product compost or clay soil as a diffusion buffer, as described above 10 to 45 weight of Yuan ((NH ₄ ) ₂ SO ₄ ) as a nitrogen source %, Urea (CO (NH ₂ ) ₂ ) 10 to 45% by weight, nitrogen fertilizer composition containing 0.1 to 3% by weight of dicyandiamide as a nitrifying agent and the balance as a balance, regardless of the composition It may be added in any amount depending on the variety of. This may be understood by those skilled in the art, in particular, by controlling the soil of the part where the plant is planted by further including by-product compost or by adding clay soil, as in conventional fertilization.

In addition, the nitrogen fertilizer composition supplying device according to the present invention, as schematically shown in Figure 1, the nitrogen fertilizer composition according to the present invention having a configuration as described above in the cylindrical container 21 of the top and bottom open. It is characterized by depositing layer 22.

In particular, the lower end of the nitrogen fertilizer composition supply apparatus according to the present invention may be used that the cleavage plate 23 is formed with a plurality of holes (24).

The nitrogen fertilizer composition supplying device thus formed is directly inserted into the soil 11 so that the heat-opening plate 23 faces downward, and in particular, the seedling cup 12 is located directly below the seedling cup 13 in which the seedlings 12 are planted or other plants. It can be inserted at an appropriate location near the root of the.

The cylindrical container 21 is preferably made of a biodegradable material such as paper. After elution of nitrogen fertilizer composition for a certain period of time, it is naturally decomposed and prevented from accumulating in the soil (11), and it is reduced to soil as it is and does not cause deterioration of soil quality. It can be understood to enable the energy saving according to the savings.

The nitrogen fertilizer composition layer 22 deposited in the cylindrical container 21 may be a nitrogen fertilizer composition according to the present invention having the above-described configuration, and may also be used for sustaining other conventional fertilizers. It will be obvious to those skilled in the art.

Opening plate 23 having a plurality of holes 24 mounted to the bottom of the cylindrical container 21 forms a plurality of holes 24 for water passage in a disk having the same diameter as the cross section of the container 21. In this way, it is possible to allow moisture in the ground to pass through the holes 24 to reach the nitrogen fertilizer composition layer 22 in the vessel 21, whereby the nitrogen fertilizer composition absorbs moisture, thereby It is decomposed to allow the release of nitrogen sources such as ammonium. The number and diameter of the holes 24 of the cleavage plate 23 may vary depending on the plant to be cultivated, which may be appropriately changed depending on the nitrogen supply time, supply amount, and the like.

In the cylindrical container 21, in addition to the nitrogen fertilizer composition layer 22 described above, a four-layer 25 (sand layer) may be further formed thereon. The four layers 25 are located between the nitrogenous fertilizer composition layer 22 and the plant, in particular the seedlings 12 of the plant, so that nitrogen sources such as ammonium released from the nitrogenous fertilizer composition layer 22 cannot reach the root of the plant directly. The fertilization effect can be adjusted by making it reach through the dead layer 25.

In addition, a diffusion buffer layer may be formed in place of the sand layer 25 in addition to the sand layer 25.

The diffusion buffer layer may be an organic diffusion buffer layer 26 of by-product compost or an inorganic diffusion buffer layer 27 of clay soil. As the organic diffusion buffer layer 26 uses compost, the organic diffusion buffer layer 26 may serve to supply other fertilizer components required for plant growth in addition to suppressing diffusion of a nitrogen source or the like.

In addition, the inorganic diffusion agent layer may be made of clay that can suppress the diffusion of nitrogen sources, without the supply of a separate fertilizer component.

Furthermore, the nitrogen fertilizer composition supplying device according to the present invention may further include a diffusion buffer layer below the nitrogen fertilizer composition layer 22 of the cylindrical container 21.

The diffusion buffer layer is composed of an organic diffusion buffer layer 26 as a by-product compost as shown in Figure 2, or an inorganic diffusion buffer layer 27 of clay soil as shown schematically in Figure 3 Can be made.

Nitrogen fertilizer composition supply apparatus according to the present invention having the configuration as described above can be used in the form of being inserted below the plant root in the planter of the young seedlings (12).

In this case, when there is a diffusion buffer layer in the ground via the hole 24 of the heat-dissipating plate 23, the absorption rate is controlled by the diffusion buffer layer, and consequently, the nitrogen fertilizer composition layer in the cylinder. (22), and the hydrolysis of the yuan and urea forming the nitrogen fertilizer composition layer 22 to slowly release ammonium or the like as a nitrogen source. Ammonium and the like as the released nitrogen source can subsequently be absorbed into the roots with water by the absorption of the roots of the plant.

As a result, the action of gypsum contained in the nitrogen fertilizer composition and the number and size of the holes 24 of the heat-dissipating plate 23 of the nitrogen fertilizer composition supply device, above the nitrogen fertilizer composition layer 22 in the nitrogen fertilizer composition supply device. Or a slow release of ammonium as a nitrogen source from the nitrogenous fertilizer composition by a complex action such as the lower layer 25 or the diffusion buffer layer located downward, and thus the nitrogen source is continuously maintained for a long time throughout the entire growth period of the plant. In the present invention, the sustained release was controlled so that ammonium was continuously eluted over 7 to 9 months close to the entire growth period of the plant.

Hereinafter, the present invention will be described in detail with reference to specific examples.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described.

The following examples are intended to illustrate the invention and should not be understood as limiting the scope of the invention.

Example 1

A nitrogen fertilizer composition according to the present invention was prepared by mixing 14.25 kg of yam, 12.90 kg of urea, 0.5 kg of dicyandiamide, and 7.5 kg of gypsum.

A cleavage layer having a plurality of holes 24 formed from a bottom thereof is mounted in a cylindrical container 21 having a diameter of 4 cm and a height of 5 cm, the top and bottom of which are open, and the nitrogen fertilizer composition above the cleavage layer. The nitrogen fertilizer composition layer 22 in which the deposit was deposited and the sand layer 25 in which sand was deposited were sequentially stacked to have the same height, thereby preparing a nitrogen fertilizer composition supplying device according to the present invention.

Example 2

A cleavage layer having a plurality of holes 24 formed from a bottom thereof is mounted in a cylindrical container 21 having a diameter of 4 cm and a height of 5 cm, the top and bottom of which are open, and depositing by-product compost above the cleavage layer. The nitrogen fertilizer composition supplying device according to the present invention was prepared by sequentially stacking the organic diffusion buffer layer 26 and the nitrogen fertilizer composition layer 22 prepared by depositing the nitrogen fertilizer composition prepared in Example 1 to have the same height.

Example 3

A cleavage layer having a plurality of holes 24 formed from a bottom thereof is mounted in a cylindrical container 21 having a diameter of 4 cm and a height of 5 cm, the top and bottom of which are open, and the clay soil is deposited above the cleavage layer. The nitrogen fertilizer composition supplying device according to the present invention was prepared by sequentially stacking the organic diffusion buffer layer 26 and the nitrogen fertilizer composition layer 22 prepared by depositing the nitrogen fertilizer composition prepared in Example 1 to have the same height.

Nitrogen fertilizer composition supplying apparatus of Examples 1 to 3 as a test sphere, and nitrogen fertilizer, three times the distribution of ammonium nitrate as a control (Comparative Example 1), the effect of nitrogen supply to the tomato crop tomato crops The quantity and nitrogen absorption of was investigated separately, and as a result the yield of tomato crops are shown in Table 1, and the nitrogen absorption is shown in Table 2, respectively.

The test for tomato crops was cultivated in a container (21) (pot), which weighed 45 kg of dry soil (11) at the facility house, and the fertilization amount was adjusted to fertilize 10 g as nitrogen per week in all treatments. Nitrogen uptake was obtained by multiplying the dry matter of the harvested tomato by the nitrogen content of the tomato, and the results described the average of four pots.

Quantity of Tomato Crops division Quantity of tomato (fruit) (g biomass weight / week) Example 1 6345 Example 2 5778 Example 3 5852 Comparative Example 1 5865

Nitrogen absorption of tomato division Nitrogen absorption of tomato fruit part (mg N / week) Nitrogen absorption of tomato leaf area (mg N / week) Example 1 8997 2592 Example 2 7798 2321 Example 3 8646 2002 Comparative Example 1 7215 2107

As shown in Table 1 and Table 2, when the nitrogen fertilizer composition and nitrogen fertilizer composition supply device according to the present invention is used for the cultivation of tomato crops, the yield of tomato fruit is generally the same as compared with the control of Comparative Example 1 (Examples 2 and 3), or significantly higher (Example 1). Nitrogen uptake was also found to be significantly higher in Example 1 and Example 2 than in Comparative Example 1 as a control. In particular, it was confirmed that Example 1 shows a significantly higher nitrogen absorption compared to Comparative Example 1 as a control.

As a result of the synthesis of the above examples, the roots of the soil (11) only once during the planting period of the young seedlings (12) younger than the nitrate nitrogen fertilizers, which were used to distribute ammonium nitrates of the control group, which were fast-acting nitrogen fertilizers, during the whole growth period of the tomato. Nitrogen fertilizer according to the invention applied as part was confirmed to show excellent results in the yield and nitrogen absorption of tomato crops. This means that the ammonium can be sustained and sustained supply by the nitrogenous fertilizer composition according to the present invention and the slow-acting substances included in the nitrogen fertilizer composition supply apparatus including the same. It can be said that it is proved that it is used and absorbed much in the growth of crops.

Example 4

A nitrogen fertilizer composition according to the present invention was prepared by mixing 47.20 kg of yam, 42.80 kg of urea, 0.5 kg of dicyandiamide, and 100.0 kg of gypsum.

A cleavage layer formed with a plurality of holes 24 from the bottom is mounted in a cylindrical container 21 having a diameter of 4.7 cm and a height of 9.8 cm, the top and bottom of which are open, and the clay soil is disposed above the cleavage layer. To prepare a nitrogen fertilizer composition supplying apparatus according to the present invention by sequentially stacking the organic diffusion buffer layer 26 and the nitrogen fertilizer composition prepared as described above to be the same height. .

Example 5

A nitrogen fertilizer composition supplying device was prepared in the same manner as in Example 4 except that a cylindrical container 21 made of paper having a diameter of 5 cm and a height of 5 cm was used.

A tomato crop was prepared using the nitrogen fertilizer composition supplying apparatus of Examples 4 and 5 as a test sphere, a control group without using a nitrogen fertilizer (Comparative Example 2) and a control group using urea fertilizer as a nitrogen fertilizer (Comparative Example 3). The nitrogen supply effect was investigated by dividing the amount and nitrogen uptake of tomato crops, the results are shown in Table 3, and the nitrogen uptake in Table 4, respectively.

In the test of tomato crops, 2.5 seedlings per 1 m ² were planted in the soil of the facility house 11 when the seedlings were grown to approximately 20 cm in length. At this time, the nitrogen fertilizer composition supplying device according to the present invention was inserted into the root portion of the seedling 12 in the soil 11 with the inlet of the cleavage opening toward the bottom. Tomatoes were harvested a total of 72 times over the entire growth period, based on 1 row and 10 weeks. Particularly, to measure the effectiveness of the tomato, tomatoes were harvested for the first two months after the establishment and the average value of the amount and nitrogen uptake of tomato fruit was harvested. The average of the quantity and nitrogen absorption of the tomato fruit harvested a total of 72 times was described. Nitrogen uptake was obtained by multiplying the dry matter of the harvested tomato by the nitrogen content of the tomato, and the results described the average of four pots.

Quantity of Tomato Crops division Quantity of tomato (fruit) / kg of tomato after initial set meal The amount of tomato (fruit) during the whole growing season (kg body weight / week) Example 4 6.4 14.2 Example 5 5.4 14.0 Comparative Example 2 4.7 7.5 Comparative Example 3 4.6 9.7

Nitrogen absorption of tomato division Nitrogen Absorption of Tomato Fruits During Whole Growth (g N / week) Nitrogen uptake of tomato leaves during whole growth (g N / week) Example 4 21.4 8.1 Example 5 21.4 7.9 Comparative Example 2 10.4 4.7 Comparative Example 3 14.4 5.5

As shown in Table 3 and Table 4, when the nitrogen fertilizer composition and nitrogen fertilizer composition supply device according to the present invention is used for the cultivation of tomato crops, tomatoes by biomass harvested a total of 72 times during the entire growth period of 9 months It was confirmed that the yield of was shown to be significantly higher than the comparative example 2 or the comparative example 3 using the urea fertilizer did not fertilize nitrogen. In addition, it was confirmed that the harvest of tomatoes for the first two months after the formulation also showed a significantly higher result than Comparative Example 2 or Comparative Example 3 using urea fertilizer. These results may be interpreted to mean that the early growth of the tomato crop was not slow, but vigorous due to the unique efficacy of the present invention. In addition, it was confirmed that the nitrogen absorption of the fruit portion and leaf portion of the tomato is significantly increased compared to Comparative Example 2 or Comparative Example 3.

The above-described examples and comparative examples, compared to the above, and collectively summarized, the present invention compared to the nitrogen fertilizer, nitrogen-free fertilizer or urea fertilizer fertilizer fertilizer fertilizers in tomato yield, nitrogen absorption It can be said that it can prove that the nitrogen absorption effect can be significantly improved over the entire growth period.

Therefore, according to the present invention, there is an effect of providing an environmentally-conserving vitality-type nitrogen fertilizer, which is viable by allowing the fertilization effect to last from 200 days to 250 days in one application by the above-described configuration.

In addition, according to the present invention due to the reduction of the nitrate content in the vegetable part It is effective in providing nitrogen fertilizer to produce safe and high quality agricultural products. Especially, only one fertilization can achieve sufficient fertilizing effect over the entire growth period of the crop, which makes it viable, and any accumulation that worsens soil quality after application. It is effective in providing environmentally friendly nitrogen fertilizer, which does not show any phenomenon.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (6)

10 to 45% by weight of yuan ((NH ₄ ) ₂ SO ₄ ) as a nitrogen source, 10 to 45% by weight of urea (CO (NH ₂ ) ₂ ), 0.1 to 3% by weight of dicyandiamide as a nitrifying agent and the balance Nitrogen fertilizer composition, including the settlement, characterized in that gypsum or clay is used as the caking agent. 10 to 45% by weight of yuan ((NH ₄ ) ₂ SO ₄ ) as a nitrogen source, 10 to 45% by weight of urea (CO (NH ₂ ) ₂ ) as a nitrogen container in a cylindrical container with open top and bottom, Nitrogen fertilizer composition supplying device characterized in that by depositing a nitrogen fertilizer composition layer comprising gypsum or clay as 0.1 to 3% by weight of amide. The method of claim 2, The cylindrical container is the nitrogen fertilizer composition supply device, characterized in that consisting of a biodegradable material such as paper. The method of claim 2, The nitrogen fertilizer composition supply device, characterized in that the cleavage plate formed with a plurality of holes in the lower end of the cylindrical container is further mounted. The method of claim 2, The nitrogen fertilizer composition supplying device, characterized in that a four-layer (sand layer) or diffusion buffer layer is further laminated in the cylindrical container in addition to or above the nitrogen fertilizer composition layer. The method of claim 5, The nitrogen fertilizer composition supply device, characterized in that the diffusion buffer layer is composed of an organic diffusion buffer layer made of by-product compost or inorganic diffusion buffer layer made of clay soil.