JP6933628B2 - Bulb Covering, Bulb Covering Bulb Covering, Bulb Storage Method Using Bulb Covering - Google Patents

Description

The present invention relates to a bulb coating agent, a coated bulb obtained by coating the bulb, and a method for preserving the bulb using the coating agent.

In general, bulbs are those in which the underground or the ground is enlarged and stores nutrients that are indispensable for growth, and are classified according to the parts that store nutrients. Specifically, the shortened stems are overlaid with enlarged and fleshy leaves, resulting in spherical "bulbs", shortened stems, spherical, oval-enlarged "bulbs", and underground. The tips of the stems and rhizomes in the area are enlarged in a spherical or massive shape, or the rhizomes that crawl long and laterally in the ground are not spherical or massive, but are enlarged in a rod shape. For example, "tuber root". Furthermore, "scales" are those with overlapping scales and a dry outer skin, such as tulips, squirrels, or onions, and layered bulbs (skinned bulbs), and scales such as lilies and fritillaria. Those that are not wrapped in the outer skin are classified as scaly bulbs (unskinned bulbs).

On the other hand, nanofibers and nanocrystals, which have been attracting attention in recent years, have excellent properties such as morphological control such as size, structure and shape, and physical properties such as light weight and strength, and will be used in various fields in the future. Is the expected material.

For the growth and flowering of bulbous plants, it is important to plant the bulbs and manage their growth thereafter. Preservation between bulb digging and planting is also as important as growth management. In other words, until the produced bulbs are cultivated, it is necessary to preserve the bulbs so that they will not be spoiled or damaged by pests.

Regarding the preservation of bulbs, layered bulbs having a dry outer skin such as onions keep the water on the surface of the bulbs appropriately because the bulbs are protected by a thin skin, and have good storability. On the other hand, since the bulbs of scaly bulbs such as lilies are not covered with a thin skin, the water content on the bulb surface cannot be maintained appropriately and the bulbs become dry.

Therefore, as a method of preserving lily bulbs, a method of burying them in lightly moistened sawdust, peat moss, or vermiculite and preserving them is known. Further, Patent Document 1 discloses an invention of a method for removing ethylene in a storage space and storing lily bulbs at a low temperature. Further, Patent Document 2 discloses an invention of a protective coating agent for bulbs containing a substance having a melting point of 40 ° C. or higher and 80 ° C. or lower as a film-forming component.

However, it is difficult to control the humidity by the method using peat moss or the like, and when the water content is high, the bacteria propagate and cause the scales to rot. In addition, when the water content is low, it dries and dies, making long-term storage difficult.

In addition, when transporting, it is necessary to transport lily bulbs together with peat moss or the like from the viewpoint of storability, which increases the transportation cost. Furthermore, when selling lily bulbs, they are often put in peat moss or the like and sold, and the product itself cannot be seen and does not look good.

Further, in the method described in Patent Document 1, an ethylene removing agent, an ethylene removing device, and the like are separately required, and strict temperature control at a low temperature and with little temperature change is required.

Further, since the protective coating agent according to Patent Document 2 is solid at room temperature of 25 ° C., it is necessary to heat the protective coating agent to a temperature equal to or higher than the melting point to melt it, which may cause considerable damage to lily bulbs.

Japanese Patent Application No. 8-142878 JP-A-9-157102

The present invention has been made in view of the above circumstances, and provides a bulb coating agent that can be easily coated and dried and maintains a good storage state, and a bulb obtained by coating the bulb with the coating agent. The purpose.

As a result of diligent studies to achieve the above object, the present inventors have found that the main component of the exodermis of the layered bulbs is cellulose and that the nano-natural polymer dispersion has a nano-network structure. In addition, paying attention to the property of being able to retain water in the nanonetwork structure, it was found that the above-mentioned problems can be solved by moisturizing the bulb surface and the inside of the bulb by coating the bulb surface, and the present invention has been developed. It has been completed.

That is, the bulb coating agent of the present invention is characterized by containing a nano-natural polymer as a coating-forming component.

INDUSTRIAL APPLICABILITY The present invention provides a bulb coating agent that can be easily coated and dried, a coated bulb obtained by coating the bulb with the coating agent, and a method for preserving the bulb using the coating agent.

In addition, since it is not necessary to use peat moss or the like when transporting lily bulbs, it is possible to reduce the transportation cost.

It is a conceptual diagram of the manufacturing (defibration processing) apparatus of CNF. It is a conceptual diagram of another CNF manufacturing (defibration processing) apparatus. It is a conceptual diagram which shows the part of the manufacturing (defibration processing) apparatus of CNF in FIG. 2 in an enlarged manner. It is a figure which shows the result of the raw weight measurement of Examples 1 and 2 and Comparative Examples 1 and 3. It is a figure which shows the growth state of Example 1. FIG. It is a figure which shows the growth state of Example 2. It is a figure which shows the growth state of the comparative example 1. It is a figure which shows the growth state of the comparative example 2. It is a figure which shows the growth state of the comparative example 3.

Next, the bulb coating agent of one embodiment of the present invention will be described, but the present invention is not limited to this embodiment.

The bulb coating agent containing the nano-natural polymer dispersion liquid of the present invention as a coating forming component is an aqueous dispersion obtained by dispersing the nano-natural polymer in water.

The nanonatural polymer used in the present invention is a fibrous substance having a diameter of less than 1 to 1000 nm and having a length of 100 times or more the diameter, or a natural polymer nanofiber having a diameter of 10 to 50 nm and a length of 10 to 50 nm. It is a natural polymer nanocrystal which is a rod-shaped or spindle-shaped ultrafine crystal of 100 to 500 nm or less.

The natural polymer used in the present invention is not particularly limited, and examples thereof include polysaccharides such as cellulose, chitin and chitosan, proteins such as collagen and gelatin, polylactic acid and polycaprolactam.

In the present invention, it is preferable to use natural polymer nanofibers having a crystallinity in the range of 50% or more. When natural polymer nanofibers with low crystallinity are used, many natural polymer nanofibers are required to maintain the nanonetwork structure, and the network structure is inferior in elasticity, so the internal pores are small. This is because the ability to retain moisture and air is inferior.

Next, a method for preparing cellulose nanofibers and an aqueous solution of cellulose nanocrystals using cellulose as a natural polymer will be described. In the present invention, examples of CNFs include CNFs derived from polysaccharides including natural plants such as wood fibers, hardwoods, conifers, bamboo fibers, sugar cane fibers, seed hair fibers, and leaf fibers, and these CNFs may be used alone. Alternatively, two or more types may be mixed and used. Further, as the polysaccharide, it is preferable to use pulp having an α-cellulose content of 60% to 99% by mass. If the purity has an α-cellulose content of 60% by mass or more, the fiber diameter and fiber length can be easily adjusted and the entanglement of the fibers can be suppressed. Compared with the case, the thermal stability at the time of melting is high, the impact strength is not lowered, the coloring suppressing effect is good, and the effect of the present invention can be further improved. On the other hand, when 99% by mass or more is used, it becomes difficult to defibrate the fibers at the nano level.

The CNF in the present invention can be obtained as a CNF dispersion (hereinafter, may be referred to as a water-containing CNF) by performing the following defibration treatment.
The defibration treatment is performed by using the underwater opposed collision method (hereinafter, also referred to as the ACC method) shown in FIG. This is a method in which pulp suspended in water is introduced into two nozzles (FIGS. 1: 108a and 108b) facing each other in a chamber (FIG. 1: 107), and the pulp is injected and collided from these nozzles toward one point. be. The device shown in FIG. 1 is of a liquid circulation type, with a tank (FIG. 1: 109), a plunger (FIG. 1: 110), two opposing nozzles (FIGS. 1: 108a, 108b), and heat as needed. A exchanger (FIG. 1: 111) is provided, and fine particles dispersed in water are introduced into two nozzles and injected from the nozzles (FIGS. 1: 108a and 108b) facing each other under high pressure to cause facing collision in water.

Before carrying out the defibration treatment, the defibration treatment may be carried out using a pretreatment device (FIGS. 2 and 3). Further, as another defibration method, such a pretreatment device may be used. The defibration treatment using the pretreatment device is carried out by colliding high-pressure water of about 50 to 400 MPa with the polysaccharide prepared in a water mixture of 0.5 to 10% by mass. This can be done, for example, by using the manufacturing apparatus 1 shown in FIG. The manufacturing apparatus 1 has a polysaccharide slurry supply path 3 which is a first liquid medium supply path arranged so that the polysaccharide slurry can be supplied to one chamber 2, and a non-polysaccharide slurry which is water, for example, in one chamber. It comprises a second liquid medium supply path 4 that circulates through 2. The first chamber 2 is provided with an orifice injection unit 5 that injects the non-polysaccharide slurry of the second liquid medium supply path 4 into an orifice in a direction intersecting the polysaccharide slurry supply direction from the polysaccharide slurry supply path 3. The polysaccharide slurry supply path 3 allows the polysaccharide slurry to be circulated through one chamber 2.

The polysaccharide slurry supply path 3 and the second liquid medium supply path 4 have a mutual intersection 6 in one chamber 2.
The polysaccharide slurry supply path 3 is a polysaccharide slurry supply section, and the tank 7 and the pump 8 for storing the polysaccharide slurry are arranged in the circulation path 9, while the second liquid medium supply path 4 is the tank 10, the pump 11, and the heat. The exchanger 12 and the plunger 13 are arranged in the liquid medium supply path 4 which is a circulation path.

The non-polysaccharide slurry is, for example, water, which is initially stored in the tank 10 and then passes through the intersection 6 with the operation of the cellulose nanofiber manufacturing apparatus 1 to store the nano-miniaturized polysaccharide in the tank 10. Those in a state where they are to be contained at a concentration according to the degree of operation are also comprehensively referred to.

As shown in FIG. 3, the circulation path 9 of the polysaccharide slurry supply path 3 is arranged in a manner of penetrating the chamber 2, and the non-polysaccharide slurry can be orifice-injected in the direction intersecting the circulation path 9 so as to penetrate the circulation path 9. The orifice injection port 14 of the orifice injection section 5 connected to the plunger 13 of the second liquid medium supply path 4 opens inside the chamber 2. The discharge port 15 of the chamber 2 is provided at a position facing the orifice injection port 14 of the chamber 2, and the circulation path of the second liquid medium supply path 4 is connected to the discharge port 15 of the chamber 2 to form a second liquid. The medium supply path 4 is configured.

On the other hand, the circulation path 9 of the polysaccharide slurry supply path 3 is formed by using, for example, a vinyl hose, a rubber hose, an aluminum pipe, or the like, and the valve is opened only in the chamber 2 direction on the entry side of the circulation path 9 into the chamber 2. The directional valve 16 is attached. Further, a one-way valve 17 that is opened only in the discharge direction from the chamber 2 is attached to the exit side of the circulation path 9 from the chamber 2. In addition, an air suction valve 18 is attached to the circulation path 9 between the chamber 2 and the one-way valve 17, and the air suction valve 18 is opened only in the direction of sucking air into the circulation path 9 from the outside.

According to the above-mentioned cellulose nanofiber manufacturing apparatus, cellulose nanofibers are manufactured as follows.
The non-polysaccharide slurry is circulated through the chamber 2 through the second liquid medium supply path 4. Specifically, the pump 11 is used to pass the non-polysaccharide slurry in the tank 10 through the heat exchanger 12 and the plunger 13 to circulate in the liquid medium supply path 4. On the other hand, the polysaccharide slurry is circulated in the polysaccharide slurry supply path 3 via the chamber 2. Specifically, the pump 8 is used to circulate the polysaccharide slurry in the tank 7 in the circulation path 9 formed by using a vinyl hose, a rubber hose, or the like.

As a result, the non-polysaccharide slurry that circulates in the second liquid medium supply path 4 is orifice-injected to the polysaccharide slurry that circulates in the polysaccharide slurry supply path 3 and circulates in the chamber 2. Specifically, high-pressure water is supplied from the plunger 13 to the orifice injection port 14 connected to the plunger 13, and the orifice is injected from the orifice injection port 14 toward the circulation path 9 at a high pressure of about 50 to 400 MPa.

As a result, it passes through the through holes 26a and 26 formed in advance in the circulation path 9 formed by using, for example, a vinyl hose, a rubber hose, an aluminum pipe, etc., and passes through the inside of the circulation path 9 in a direction intersecting the circulation path 9. The non-polysaccharide slurry is discharged toward the discharge port 15 of the chamber 2 while involving the polysaccharide slurry circulating in the circulation path 9, and flows into the second liquid medium supply path 4. As a result, the non-polysaccharide slurry circulates in the second liquid medium supply path 4 again.
In the process of repeating the above process, the polysaccharides in the polysaccharide slurry circulating in the polysaccharide slurry supply path 3 and circulating in the chamber 2 and the polysaccharides in the non-polysaccharide slurry circulating in the second liquid medium supply path 4 are gradually defibrated. Therefore, a CNF dispersion having a high degree of uniformity of defibration according to the application can be obtained.

The degree of defibration from pulp fibers to CNF can be evaluated by the viscosity value of the CNF dispersion liquid. That is, since the CNF contained in the CNF dispersion having an increased degree of defibration has a short fiber length, the viscosity value is low. Therefore, the CNF dispersion having a high degree of defibration has a low viscosity. On the other hand, in the CNF dispersion having a higher viscosity value than this, the CNF contained in the CNF dispersion has a long fiber length, so that the viscosity value is high. Therefore, the degree of defibration is lower than that of the CNF dispersion.
Further, since the ratio (aspect ratio) of the fiber length to the fiber diameter after defibration is different for each pulp fiber, the viscosity value of the CNF dispersion liquid is different for each pulp fiber.
Further, for example, by combining different types of pulp fibers or by adjusting the degree of defibration, the viscosity of 1 wt% of the CNF aqueous dispersion can be adjusted in the range of approximately 300 to 10,000 mPa · s.

The CNF obtained as described above has a structural formula represented by the following chemical formula 1 without any structural change of the cellulose molecule because the nanominiaturization is performed by cleaving only the interaction between the natural cellulose fibers. In other words, the CNF used in the present invention means that it has 6 hydroxyl groups in the cellobiose unit in Chemical Formula 1 and is not chemically modified. This can be confirmed by comparing the IR spectrum of cellulose with the CNF used in the present invention using FT-IR. By this ACC method, the average particle length of cellulose fibers can be pulverized to 10 μm, and as a result, CNF having an average thickness of 3 to 200 nm and an average length of 0.1 μm or more can be obtained.

The cellulose nanocrystals in the present invention are obtained by subjecting the cellulose fibers obtained by the ACC method to a chemical treatment such as acid hydrolysis using an acid such as sulfuric acid, or to the pulp before the micronization treatment by the ACC method. It is obtained by subjecting chemical treatment such as acid hydrolysis of sulfuric acid, etc., and then performing micronization treatment by the ACC method. Cellulose nanocrystals are also called cellulose nanowhiskers.

For the measurement of the average thickness and the average fiber length, a scanning electron microscope (SEM), a transmission electron microscope (TEM), etc. are appropriately selected, CNF is observed and measured, and 20 or more are selected from the obtained photographs. , Obtained by averaging each of these. On the other hand, in the counter-collision treatment, the applied energy is far less than the energy for breaking the covalent bond (estimated to be 1/300 or less), and the degree of polymerization of cellulose does not decrease. The cellulose nanofibers obtained by this ACC method show amphipathic properties in which hydrophilic sites and hydrophobic sites coexist.

In the present invention, TEMPO oxidation catalyst, phosphoric acid treatment, ozone treatment, enzyme treatment, maleic acid treatment, hydrophobic modification with alkenyl succinic anhydride, and hydrophobicity with alkyl keten dimer, which are known as other methods for producing cellulose nanofibers. Cellulose-based fibers by wet grinding using mechanical actions such as cellulose nanofibers or grinders (stone mill type grinders), disc type refiners, and conical refiners obtained by chemical treatment methods such as modification and hydrophobic modification by acetylation. Even cellulose nanofibers obtained by a physical method of thinning can be used as a CNF dispersion in the present invention.

In addition to the above-mentioned film-forming components, the coating agent of the present invention contains auxiliary components such as thickeners, fungicides, phytonutrients, plant growth control agents, fertilizers, colorants, and inorganic powders for preventing tacks. You may let me.

The fungicide prevents harmful fungi such as mold from growing on the bulbs and is invaded by pests during storage and, in some cases, after planting, and it is desirable to include the fungicide in the coating agent. Alternatively, the bulbs may be treated with the fungicide by immersing the fungicide in a powder coating or a suspension of the fungicide in advance, and then treated with the coating agent of the present invention. The colorant colors the coating agent, and the nano-natural polymer is also excellent in colorability. Therefore, by coating the plant surface with the nano-natural polymer pre-colored with the colorant, the design of the plant can be improved. It can also be expected to have the effect of increasing sales and promoting sales. For example, bulbs coated with a nano-natural polymer colored with a red dye are pinkish to give a feeling of vitality improvement, and the plant surface can be coated with a green-dyed nano-natural polymer to give freshness. ..

The content of the nanonatural polymer in the coating agent of the present invention is not particularly limited, but is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.1 to 3.0% by mass, and further. Preferably, it is 0.5 to 1.5% by mass. If it is 0.01% by mass or less, the viscosity required for coating the bulbs is insufficient, and the nanonatural polymer does not adhere to the bulbs. On the other hand, if it is 10% by mass or more, the coating agent itself becomes a solid, and the bulbs cannot be coated with the nanonatural polymer.

In order to coat the surface of the bulb with the above-mentioned coating agent and obtain a coated bulb, the bulb is dipped to the base in a tank containing the coating agent, applied with a brush or the like, or sprayed on the bulb. It is obtained by forming a coating layer on the bulbs. At this time, it is preferable to cover up to the base excluding the roots. This is because if CNF is attached to the roots, the roots will adhere to each other and the CNF will contract, resulting in damage to the roots. Moreover, you may blow dry or the like if necessary.
As described above, the coating agent according to the present invention can form a coating layer on the surface of the bulb because the viscosity of the coating agent is suitable for coating such as coating, dipping, and spraying. .. In other words, the coating agent can be easily coated on the bulbs and the like, and the excess coating agent on the bulbs and the like can be easily removed.

Further, a nanonetwork structure made of nanonatural polymers is formed on the surface of the coated bulbs coated with the coating agent according to the present invention. That is, the coated bulbs are covered with a coating layer having nano-sized voids. As a result, the coated bulbs can take in and expel air and moisture from the nano-unit voids of the coating layer, and can store the bulbs in a good manner. Further, since the coating layer has nano-unit voids, the bulbs can be protected from pests, bacteria and the like. In addition, the germination is better than that of the coating layer having no voids, and when the coating layer is planted in soil, it is decomposed by microorganisms having cellulase activity, so that the coating layer is not present and the germination of bulbs is not hindered. ..
Here, the nano-unit voids are fibrous substances having a diameter of less than 1 to 1000 nm, natural polymer nanofibers having a length of 100 times or more the diameter, or natural polymer nanofibers having a diameter of 10 to 50 nm and a length of 100. It refers to a void formed by overlapping natural polymer nanocrystals, which are rod-shaped or spindle-shaped ultrafine crystals of ~ 500 nm or less, with each other.

On the other hand, when the surface of the bulb is coated with a substance having no nanonetwork structure, nano-unit voids are not formed on the surface of the bulb. Therefore, unlike the coated bulbs according to the present invention, it is not possible to take in air or moisture, or to expel excess moisture that leads to putrefaction. Furthermore, since the surface of the bulb is completely covered, there is a risk of hindering the germination of the bulb.

From the viewpoint of forming a nanonetwork structure on the surface of bulbs and protecting the bulbs, the coating agent of the present invention is classified into other than scaly bulbs such as layered bulbs having a dry exodermis on the outside such as onions and tulips. It can also be used for bulbs. Specifically, even in the case of layered scales, the scales may be exposed to the outside, such as a part of the integument is missing or the bulb surface is cracked. Even in such a case, the bulbs can be preserved by using the coating agent of the present invention at the relevant portion.

Furthermore, in addition to the bulbs of each variety, the coating agent of the present invention includes beech, chestnut, walnut, loquat, aoki, aoi, cha, wasabi, ginkgo, etc., which are known as seeds whose storability rapidly decreases when dried. It can also be used for storing seeds of.

When storing the coated bulbs, there are low temperature storage at 0 to 10 ° C, ice temperature storage at 0 to -4 ° C, room temperature storage at room temperature, etc., but the storage method is particularly limited. It can be selected as appropriate without any problem.

Hereinafter, specific examples and effects of the invention will be shown by Examples and Comparative Examples, but the present invention is not limited to these Examples.

(Example 1)
Using bamboo-derived pulp as a raw material, 1% of cellulose nanofiber dispersion liquid (hereinafter, also referred to as CNF bamboo) was prepared by the ACC method, and this was used as a coating agent for lily bulbs. The lily bulbs after washing with water were immersed in this coating agent for 15 seconds.

The obtained coated lily bulbs were dried overnight, placed in a plastic bag and stored at 4 ° C. for 4 months, and the fresh weight at the time of storage was measured. The results are shown in FIG. Furthermore, a growth test was conducted on the covered lily bulbs after storage from March 19, 2018. After planting 10 balls, the bud elongation rate at the time of planting, the average number of buds (days), the average number of buds (days), the average number of flowering days (days), the average plant height (cm), the average number of expanded leaves (sheets) and The average number of flowers (pieces) was measured. The results are shown in Table 1. Further, FIG. 5 shows the state of the growth test from April to June 2018. The bud elongation rate was evaluated by the fact that the nose (near the stem apex in the center of the bulb) protruded from the bulb. The average thickness of the coating material measured with a thickness gauge was 176.7 ± 61.5 μm.

(Example 2)
Using pulp derived from softwood as a raw material, 1% of cellulose nanofiber dispersion liquid (hereinafter, also referred to as CNF softwood) was prepared by the ACC method, and this was used as a coating agent for lily bulbs. Using this coating agent, coated lily bulbs were prepared in the same manner as in Example 1, stored under the same conditions as in Example 1, raw weight measurement and growth test were carried out. The results are shown in FIG. 4 and Table 1, and the state of the growth test from April to June 2018 is shown in FIG.

(Comparative Example 1)
Using the lily bulbs washed with water, storage, raw weight measurement and growth test were carried out under the same conditions as in Example 1 (hereinafter, may be untreated). The results are shown in FIG. 4 and Table 1, and the state of the growth test from April to June 2018 is shown in FIG.

(Comparative Example 2)
It was placed in a plastic bag together with lily bulbs and moist peat moss after washing with water, stored under the same conditions as in Example 1, raw weight was measured, and a growth test was carried out. The results are shown in FIG. 4 and Table 1, and the state of the growth test from April to June 2018 is shown in FIG.

(Comparative Example 3)
Replace 1% of the cellulose nanofiber dispersion in Example 1 with a 10% suspension having the product name "Cellulose, powder, passed through 38 μm (400 mesh)" manufactured by Wako Pure Chemical Industries, Ltd., and store under the same conditions as in Example 1. Raw weight measurement and growth test were performed. The results are shown in FIG. 4 and Table 1, and the state of the growth test from April to June 2018 is shown in FIG.

表１に示すように、実施例１のＣＮＦ竹、実施例２のＣＮＦ針葉樹は、比較例２のピートモスと出芽日数、発蕾日数及び到花日数は同程度であり、比較例１の無処理及び比較例３の１０％セルロースと比較すると、前記日数は全て１０日程度速い結果となった。
一方、実施例１、２の草丈及び花数については、比較例１〜３と比較して、草丈が長く、花数も多い結果となった。以上のように、本発明のユリ球根の被覆剤は、簡易なコーティング処理が可能であるとともに、これを被覆してなる被覆球根は、発育性に優れることが明らかとなった。これは、被覆ユリ球根の表面に被膜されたＣＮＦ竹（実施例１）、ＣＮＦ針葉樹（実施例２）が植付け後に土壌中に分散され、土壌中に存在する細菌などが保有するセルラーゼ等の酵素により継続的に徐々に分解され、糖類へと変換されるため、成長促進がなされたものと考えられる。

As shown in Table 1, the CNF bamboo of Example 1 and the CNF conifer of Example 2 have the same number of days of budding, buds and flowering as that of the peat moss of Comparative Example 2, and are untreated in Comparative Example 1. And, as compared with the 10% cellulose of Comparative Example 3, the number of days was all about 10 days faster.
On the other hand, as for the plant height and the number of flowers of Examples 1 and 2, the plant height was longer and the number of flowers was larger than that of Comparative Examples 1 to 3. As described above, it has been clarified that the coating agent for lily bulbs of the present invention can be subjected to a simple coating treatment, and the coated bulbs coated with the coating agent have excellent growth potential. This is because CNF bamboo (Example 1) and CNF coniferous tree (Example 2) coated on the surface of coated lily bulbs are dispersed in the soil after planting, and enzymes such as cellulase possessed by bacteria existing in the soil. It is considered that the growth was promoted because it was continuously and gradually decomposed into sugars.

Claims (6)

A bulb coating agent containing a nano-natural polymer dispersion as a coating-forming component.
The natural polymer is a fibrous cellulose having a diameter of less than 1 to 1000 nm.
A bulb coating agent, wherein the content of the nanonatural polymer is 0.01% by mass or more and 1.5% by mass or less. A bulb coating agent containing a nano-natural polymer dispersion as a coating-forming component.
The natural polymer is a fibrous cellulose having a diameter of less than 1 to 1000 nm.
The content of the nanonatural polymer is 0.01% by mass or more and 10.0% by mass or less.
A bulb coating agent characterized in that it is used by covering up to the base excluding the root of the bulb. A coated bulb coated with the coating agent for the bulb according to claim 1 or 2. A coated bulb according to claim 1, wherein the coating agent for the bulb is coated up to the base excluding the root of the bulb. A method for storing bulbs using the bulb coating agent according to claim 1 or 2. A bulb coating agent containing a nano-natural polymer dispersion as a coating-forming component.
The natural polymer is a fibrous cellulose having a diameter of less than 1 to 1000 nm.
A method for storing bulbs, which comprises coating a bulb coating agent having a content of the nanonatural polymer of 0.01% by mass or more and 10.0% by mass or less up to a base excluding the roots of the bulbs.

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