Rice coating structure used for sowing in dry areas

Abstract

To provide a rice coating structure used for dryland sowing.SOLUTION: A rice coating structure used for dryland sowing comprises: a first coating layer obtained by applying an aqueous solution of maltodextrin to a surface of rice and drying the rice to a moisture content of 2% to 10% before solidification; a second coating layer formed by directly applying potassium polyacrylate powder to the first coating layer, causing the same to absorb moisture before solidification, and expanding the same by 1% to 10%; a third coating layer applied to a surface of the second coating layer to fill gaps of the second coating layer, absorbing an excessive moisture of the first coating layer and the second coating layer, stopping expansion of the second coating layer, and completely solidifying the same, therefore the rice is cultivated in a dry area by a direct soil-covering sowing method, which has practical effects of a low cost, easy storage and high yield.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seed coating structure, and particularly to a rice coating structure that is low cost, easy to store, has high yield, and is used for sowing in dry areas. [Background technology]

[0002] Direct seeding of rice is a cultivation method in which rice is sown directly into paddy fields, and does not require raising seedlings or transplanting, which has the advantage of reducing cultivation costs, labor costs, time costs, etc. However, there is still a drawback: seeds exposed to the surface of the paddy field are easily eaten by birds such as sparrows, resulting in a lower germination rate. Therefore, one method is to coat rice seeds with iron powder, which prevents seeds sown on the soil surface from floating away and being eaten by sparrows. However, this technology relies on the solidification of iron powder through oxidation, and iron powder has the drawback of generating heat upon oxidation. As a result, producing coated rice requires a great deal of effort and significantly increases production costs, so iron powder coating is not an optimal solution.

[0003] Furthermore, regardless of whether rice is grown by seedling transplanting or direct seeding, it must be maintained in an irrigated paddy field, meaning that the water level must be at least 10 centimeters visible when viewing the paddy field. This not only requires constant monitoring and irrigation by farmers, but also consumes a large amount of water resources, making the spread of dryland cultivation highly necessary. When coating rice seeds with iron powder, additional water-retaining material is added and mixed and coated in aqueous solution to form a bond. This allows the water-retaining material to absorb water and fully expand, reducing its effective water-retaining volume. If the amount added is too small, the goal of long-term water retention cannot be achieved. When directly coating with water-retaining powder, stable coating is not achieved, the coating thickness is insufficient, and the rice is easily torn and peeled. These are the shortcomings that this invention aims to address.

[0004] With this in mind, the inventor has used his experience of several years in the manufacturing, development and design of related products to carry out detailed design and careful evaluations to achieve the above goals, and has finally achieved the present invention, which is certainly practical. Summary of the Invention Problems that the invention aims to solve and means for solving the problems

[0005] The technical problem to be solved by the present invention is to provide a coating structure for rice used for sowing in dry areas, based on the above-mentioned drawbacks existing in the existing technology.

[0006] The first coating layer is formed by applying a maltodextrin aqueous solution to the surface of the rice grain and drying it to a moisture content of 2% to 10% before solidifying. The second coating layer is formed by applying potassium polyacrylate powder directly to the first coating layer and allowing it to absorb moisture and expand by 1% to 10% before solidifying. A third coating layer is then applied to the surface of the second coating layer, filling any gaps in the second coating layer. The third coating layer absorbs excess moisture from the first and second coating layers, stopping the expansion of the second coating layer and allowing it to solidify completely.

[0007] The weight percent concentration (P%) of the aqueous maltodextrin solution is 20% to 50%.

[0008] The second coating layer is formed by adhering potassium polyacrylate powder to the sticky, wet first coating layer through stirring, and then bonding the potassium polyacrylate powder particles together using moisture.

[0009] The second coating layer is made by coating 1 kilogram of the rice with 100 to 200 grams of potassium polyacrylate powder.

[0010] The second coating layer has a porosity of 10% to 30%.

[0011] The third coating layer is formed by directly attaching talc powder to the surface of the second coating layer, and the particle size of the talc powder is one-tenth to one-fifth the particle size of the potassium polyacrylate powder.

[0012] The third coating layer is 10 to 40 grams of talc powder coated on 1 kilogram of the rice.

[0013] The talc powder for the third coating layer is added and stirred in immediately after the second coating layer is formed.

[0014] The thickness ratio of the first coating layer, the second coating layer and the third coating layer is 1:8:1 or 1:7:2.

[0015] The rice coated with the first coating layer, the second coating layer and the third coating layer is directly sown in a dry land by covering with soil.

[0016] The first main object of the present invention is as follows: The process of forming the first coating layer creates an appropriate moisture content and stickiness in the rice grain. Furthermore, by directly attaching potassium polyacrylate powder to form the second coating layer, the water retention capacity per unit volume can be significantly increased. Furthermore, before the second coating layer dries, talc powder is directly mixed in to form the third coating layer, which is used to absorb excess moisture. The first and second coating layers are then coated and solidified to form a loose, stable structure. Therefore, the rice grain can be coated using a small amount of natural raw materials and a rapid forming process, resulting in practical benefits such as rapid processing, low cost, easy storage, and high yield.

[0017] The second main object of the present invention is as follows: After farmers plow and irrigate a rice field to form a wetland, they directly sow the rice (coated with the first coating layer, the second coating layer, and the third coating layer) into the plowed field and then cover it with soil. The second coating layer absorbs water and maintains a water-retaining state, allowing the rice to be irrigated completely without flooding before germination, or to be irrigated lightly in arid areas depending on the dry conditions. This saves a large amount of water resources and also reduces the farmer's maintenance efforts, resulting in lower costs, less water consumption, easier maintenance, and a higher germination rate compared to traditional direct-seeded rice cultivation.

[0018] Other objects, advantages and novel features of the invention will become more apparent from the following detailed description and the associated drawings. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to allow the examiner to better understand and appreciate the objects, features and effects of the present invention, the present invention will be described in detail below in combination with (Brief Description of the Drawings). Please refer to FIG. 1. The coating structure of rice used for sowing in arid areas includes a first coating layer 10, a second coating layer 20, and a third coating layer 30. The first coating layer 10 is formed by applying a maltodextrin solution to the surface of rice A and drying it to a moisture content of 2% to 10% before solidifying. The second coating layer 20 is formed by applying potassium polyacrylate powder directly to the first coating layer 10 and allowing it to absorb water and expand by 1% to 10% before solidifying. The second coating layer 20 has a porosity of 10% to 30%. The third coating layer 30 is formed by applying talc powder directly to the surface of the second coating layer 20. The particle size of the talc powder is one-tenth to one-fifth the particle size of the potassium polyacrylate powder. The talc powder can be coated on the surface of the second coating layer 20 and simultaneously fill the gaps in the second coating layer 20. Furthermore, the third coating layer 30 absorbs excess moisture from the first coating layer 10 and the second coating layer 20, thereby stopping the expansion of the second coating layer 20 and allowing it to completely solidify. The thickness ratio of the first coating layer 10, the second coating layer 20 and the third coating layer 30 is 1:8:1 or 1:7:2. In summary, rice A coated with the first coating layer 10, the second coating layer 20 and the third coating layer 30 is directly sown in dry land with the soil covered.

[0021] For details on the formation of this structure, please refer to Figure 1. Step 1: Maltodextrin powder is added to water and stirred to achieve a weight percent concentration (P%) of 20% to 50%. This concentration can control the viscosity of the first coating layer 10. Maltodextrin is a natural ingredient that does not contaminate cultivated rice fields. It also has a freshness-preserving effect on the rice A, extending its shelf life. Step 2: The rice A is immersed in the maltodextrin aqueous solution, then scooped up and dried. The drying method can be sun-drying, natural air-drying, hot air drying, vacuum drying, freeze-drying, or any other method, and is not limited to a specific method. After drying to a moisture content of 2% to 10%, the sticky first coating layer 10 is formed. Step 3: Potassium polyacrylate powder is mixed with the rice A coated with the first coating layer 10. That is, the second coating layer 20 is formed by adhering potassium polyacrylate powder to the sticky, wet first coating layer 10 through stirring. The viscosity of the first coating layer 10 allows some of the potassium polyacrylate powder to adhere, and moisture is used to bond the potassium polyacrylate powder particles together, ensuring a sufficient coating thickness for the second coating layer 20. That is, the moisture content of the first coating layer 10 controls the thickness of the second coating layer 20. The second coating layer 20 is formed by coating 1 kilogram of rice A with 100 to 200 grams of potassium polyacrylate powder. Step 4: Talc powder is mixed with the rice A coated with the second coating layer 20. The talc powder for the third coating layer 30 is added and stirred immediately after the second coating layer 20 is formed, filling the gaps in the second coating layer 20 and coating its surface with the talc powder. The separating effect of the third coating layer 30 prevents the coated rice grains A from sticking together and forming lumps. Additionally, talc powder is used to absorb excess moisture, stop the expansion of the second coating layer 20, and simultaneously allow the first coating layer 10 and the second coating layer 20 to solidify quickly.This prevents the second coating layer 20 from absorbing too much water, causing excessive swelling and a loss of its effective water retention capacity. It also maintains the density of the coating, preventing the second coating layer 20 from easily cracking and peeling after solidification. The third coating layer is formed by coating 1 kilogram of rice with 10 to 40 grams of talc powder. In summary, during the formation of the first coating layer 10, the rice grains A are given an appropriate moisture content and adhesiveness. Furthermore, by directly mixing and stirring potassium polyacrylate powder, the second coating layer 20 can be rapidly formed, and the potassium polyacrylate powder can be directly attached, significantly increasing the water retention capacity per unit volume. Furthermore, before the second coating layer 20 dries, talc powder is directly stirred in to form the third coating layer 30, which is then used to absorb excess water. The first coating layer 10 and the second coating layer 20 are then coated and solidified to form a loose and stable structure. Therefore, the coating of the rice A is completed using a small amount of natural raw materials and a quick molding process, which has the practical advantages of quick processing, low cost, easy storage, and high yield.

[0022] In actual use, farmers plow and irrigate their rice fields to form wetlands, then directly sow the rice plants A (coated with the first coating layer 10, the second coating layer 20, and the third coating layer 30) into the plowed fields and cover them with soil. The second coating layer 20 absorbs water and maintains a water-retaining state, allowing the rice plants A to be irrigated without flooding before germination, or to be irrigated lightly in arid areas depending on the dry conditions. This saves a large amount of water resources and also reduces the farmer's maintenance efforts, resulting in lower costs, less water consumption, easier maintenance, and a higher germination rate compared to traditional direct-seeded rice cultivation.

[0023] However, the above description is merely a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. In other words, any equivalent changes or modifications made based on the claims of the present invention should fall within the scope of the patent of the present invention. [Explanation of symbols]

[0024] [The present invention] A. Rice 10 First coating layer 20 Second coating layer 30 Third coating layer

Claims

1. A first coating layer containing maltodextrin provided on the surface of rice; a second coating layer provided on the surface of the first coating layer, the second coating layer containing potassium polyacrylate particles that have swelled by 1% to 10% by absorbing the moisture contained in the first coating layer; a third coating layer provided on the surface of the second coating layer, filling gaps in the second coating layer, and absorbing moisture from the first coating layer and the second coating layer; A coating structure of rice used for sowing in dry areas.

2. 2. The coating structure for rice used for sowing in arid areas according to claim 1, wherein the second coating layer is formed by adhering potassium polyacrylate powder to the wet, sticky first coating layer, and further by bonding the potassium polyacrylate powder particles to each other using moisture.

3. 2. The coating structure for rice used for sowing in arid areas according to claim 1, wherein the second coating layer contains 100 to 200 grams of potassium polyacrylate per kilogram of the rice.

4. 2. The coating structure for rice used for sowing in dry areas according to claim 1, wherein the second coating layer has a porosity of 10% to 30%.

5. 3. The coating structure for rice used for sowing in arid areas according to claim 2, wherein the third coating layer is made of talc powder, and the particle size of the talc powder is one-tenth to one-fifth of the particle size of the potassium polyacrylate powder.

6. 6. The coating structure for rice used for sowing in arid areas according to claim 5, wherein the third coating layer contains 10 to 40 grams of talc powder per kilogram of the rice.

7. 2. The coating structure for rice used for sowing in arid areas according to claim 1, wherein the thickness ratio of the first coating layer, the second coating layer and the third coating layer is 1:8:1 or 1:7:

2.

8. 2. The coating structure for rice used for sowing in arid areas according to claim 1, wherein the rice coated with the first coating layer, the second coating layer, and the third coating layer is directly sown in arid areas by covering with soil.

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