Agent for promoting absorption of fertilizer component by plant, and fertilizer for plants comprising the same

Abstract

To provide an agent for promoting the absorption of a fertilizer component by a plant, designed to improve the absorption efficiency of a fertilizer component (e.g. potassium, phosphorus, nitrogen) in a treated plant.SOLUTION: An agent for promoting the absorption of a fertilizer component by a plant includes unsaturated oxo fatty acid or a derivative thereof or a salt thereof.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a plant fertilizer component absorption enhancer and a plant fertilizer containing the same. [Background technology]

[0002] Technologies for regulating plant growth have been developed with the aim of improving the supply efficiency of cereal and horticultural plants. In addition to measures such as optimizing temperature and sunlight conditions and fertilization, methods for improving the absorption efficiency of applied fertilizer components have been reported.

[0003] Patent Document 1 discloses a plant activator that uses fatty acids or their derivatives to improve the absorption of at least one of the main components of plant fertilizers, nitrate ions, phosphate ions, and potassium ions, by 10% or more.

[0004] However, the plant activator described in Patent Document 1 still does not sufficiently improve the absorption efficiency of fertilizer components. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-288011 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to improve the absorption efficiency of fertilizer components (potassium, phosphorus, nitrogen) in the plant body to which the fertilizer is applied. [Means for solving the problem]

[0007] The present invention relates to a fertilizer component absorption promoter for plants, which comprises an unsaturated oxo fatty acid or a derivative or salt thereof.

[0008] The plant fertilizer component absorption promoter preferably further contains a hydroxylated fatty acid or a derivative thereof or a salt thereof.

[0009] The plant fertilizer component absorption promoter preferably further contains an unsaturated fatty acid (excluding unsaturated oxo fatty acid and unsaturated hydroxylated fatty acid).

[0010] The plant fertilizer component absorption enhancer, wherein the unsaturated oxo fatty acid or its derivative or salt thereof is represented by the following formula (I): HOOC-(R 1 )-CH=CH-C(=O)-R 2 (I) (In the formula, R 1 : a linear or branched, saturated or unsaturated hydrocarbon group containing 6 to 12 carbon atoms, R 2 : an alkyl group having 2 to 8 carbon atoms, which may contain one or more branches and / or double bonds) or a derivative or salt thereof.

[0011] The plant fertilizer component absorption promoter, wherein the unsaturated oxo-fatty acid is R 1 The hydrocarbon group has 8 to 10 carbon atoms, and R 2 It is an unsaturated oxo fatty acid in which the alkyl group has 4 to 6 carbon atoms.

[0012] The plant fertilizer component absorption promoter, wherein the unsaturated oxo-fatty acid is R 1 is an unsaturated oxo fatty acid containing a double bond that forms a conjugated double bond with the double bond between the α and β carbons of the carbonyl group in formula (I).

[0013] The plant fertilizer component absorption promoter, wherein the unsaturated oxo-fatty acid is R 1 is a linear or branched hydrocarbon group having 9 carbon atoms, and R 2is an unsaturated oxo fatty acid with an alkyl group containing five carbon atoms.

[0014] In the agent for enhancing plant fertilizer component absorption, the unsaturated oxo-fatty acid is ketooctadecadienoic acid.

[0015] In the agent for enhancing plant fertilizer component absorption, the unsaturated oxo-fatty acid is 13-oxo-9,11-octadecadienoic acid.

[0016] The plant fertilizer component absorption promoter, wherein the hydroxylated fatty acid or its derivative or salt thereof is represented by the following formula (II) and / or (III): HOOC-(R 3 )-CH(OH)-CH(OH)-CH=CH-CH(OH)-R 4 (II) HOOC-(R 3 )-CH(OH)-CH=CH-CH(OH)-CH(OH)-R 4 (III) (In the formula, R 3 represents a linear or branched hydrocarbon group having 4 to 12 carbon atoms, which may contain one or more double bonds and / or OH groups, and when a double bond is contained, the position of the double bond is not limited; R 4 is a linear or branched hydrocarbon group having 2 to 8 carbon atoms, which may contain one or more double bonds and / or OH groups, and when it contains a double bond, the position of the double bond is not limited. The hydroxylated fatty acid has the structural formula:

[0017] The fertilizer component absorption promoter for plants, wherein the hydroxylated fatty acid is R 3 The hydrocarbon group has 6 to 8 carbon atoms, and R 4 The hydrocarbon group has 4 to 6 carbon atoms.

[0018] The plant fertilizer component absorption promoter, wherein the hydroxylated fatty acid is R3 But -(CH2) n -(n is an integer between 4 and 12), and R 4 But C n H 2n+1 -(n is an integer of 2 to 8).

[0019] The plant fertilizer component absorption promoter, wherein the hydroxylated fatty acid is R 3 is an alkylene group having 7 carbon atoms (-(CH2)7-), and R 4 is an alkyl group with 5 carbon atoms (CH3CH2CH2CH2CH2-).

[0020] In the plant fertilizer component absorption promoter, the hydroxylated fatty acid is hydroxyoctadecenoic acid.

[0021] In the agent for enhancing plant absorption of fertilizer components, the hydroxylated fatty acid is 9,10,13-trihydroxy-11-octadecenoic acid.

[0022] In the agent for enhancing plant absorption of fertilizer components, the hydroxylated fatty acid is 9,12,13-trihydroxy-10-octadecenoic acid.

[0023] In the plant fertilizer component absorption promoter, the unsaturated fatty acid (excluding unsaturated oxo fatty acid and unsaturated hydroxylated fatty acid) is an unsaturated fatty acid having 10 to 20 carbon atoms.

[0024] The plant fertilizer component absorption promoter is characterized in that the unsaturated fatty acid (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids) is a mono- or polyunsaturated fatty acid including at least one selected from the group consisting of oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid.

[0025] In the plant fertilizer component absorption promoter, the unsaturated fatty acid is linoleic acid.

[0026] The plant fertilizer contains the plant fertilizer component absorption promoter and the plant fertilizer component.

[0027] In addition, "octadecenoic acid" is also commonly referred to as "octadecaenoic acid" (for example, JP 3-14539 A), and the above-mentioned "9,10,13-trihydroxy-11-octadecenoic acid" is also referred to as "9,10,13-trihydroxy-11-octadecenoic acid" or "9,10,13-trihydroxyoctadec-11-enoic acid." Similarly, the above-mentioned "9,12,13-trihydroxy-10-octadecenoic acid" is also referred to as "9,12,13-trihydroxy-10-octadecenoic acid" or "9,12,13-trihydroxyoctadec-10-enoic acid." In the examples, the manufacturer's name is also listed in parentheses. The above explanation applies to all "octadecenoic acid" used in this specification, claims, drawings, and abstract.

[0028] The structural formula of "9,10,13-trihydroxy-11-octadecenoic acid" is shown in the following structural formula (1).

[0029] [ka]

[0030] The structural formula of "9,12,13-trihydroxy-10-octadecenoic acid" is shown in the following structural formula (2).

[0031] [ka]

[0032] The derivatives of the unsaturated oxo fatty acids and hydroxylated fatty acids are preferably esters of the unsaturated oxo fatty acids and hydroxylated fatty acids, respectively. As salts of the unsaturated oxo fatty acids and hydroxylated fatty acids, salts such as sodium salts, potassium salts, and ammonium salts, which will be described later, can be used.

[0033] The plant fertilizer component absorption promoter is preferably used as a spray or immersion agent to be brought into contact with plant roots, or as a soil drench agent, or mixed with plant fertilizer or plant fertilizer components.

[0034] The plant fertilizer component absorption enhancer is preferably used for plants selected from the Brassicaceae, Poaceae, Leguminosae, Solanaceae, Rosaceae, Amaranthaceae, and Malvaceae families.

[0035] The plant fertilizer component absorption enhancer of the present invention may be in liquid or powder form. When in powder form, an aqueous dispersion of unsaturated oxo fatty acid or its derivative or salt (which may optionally contain hydroxylated fatty acid or its derivative or salt and / or unsaturated fatty acid (excluding unsaturated oxo fatty acid and unsaturated hydroxylated fatty acid)) is freeze-dried to obtain the powder.

[0036] It is also desirable that the aqueous dispersion contains a stabilizer.

[0037] The stabilizer is preferably an emulsifier.

[0038] Furthermore, the emulsifier is preferably at least one selected from potassium carbonate and dipotassium hydrogen phosphate. [Effects of the Invention]

[0039] The plant fertilizer component absorption promoter of the present invention can improve the absorption efficiency of fertilizer components potassium, phosphorus, and nitrogen by plants, thereby promoting plant growth. Furthermore, a plant fertilizer containing the plant fertilizer component absorption promoter of the present invention and the plant fertilizer components has a high absorption efficiency of fertilizer components, and therefore has a high plant growth-promoting effect. DETAILED DESCRIPTION OF THE INVENTION

[0040] The fertilizer component absorption enhancer for plants of the present invention contains an unsaturated oxo fatty acid or a derivative or salt thereof.

[0041] The fertilizer component absorption promoter for plants of the present invention contains an unsaturated oxo fatty acid or a derivative or salt thereof, and by applying this fertilizer component absorption promoter to a part of a plant's roots, adding it to the soil, or mixing it with a plant fertilizer, the absorption efficiency of potassium, phosphorus, and nitrogen in the soil or plant fertilizer can be increased, thereby promoting plant growth.

[0042] The plant fertilizer component absorption promoter of the present invention preferably further contains a hydroxylated fatty acid, a derivative thereof, or a salt thereof. Hydroxylated fatty acids, derivatives thereof, or salts thereof are known to have a plant growth-promoting effect and can increase the yield of plants such as vegetables, grains, and fruits.

[0043] Furthermore, in plant fertilizer component uptake enhancers that contain unsaturated fatty acids (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids) as active ingredients, the soil, fertilizer, and active ingredients may be washed away from their site of action by rain, etc. Such washing away of the active ingredients by rain, wind erosion, and other erosive forces can significantly reduce the duration of the plant fertilizer component uptake enhancer.

[0044] The plant fertilizer component absorption enhancer of the present invention contains the above-mentioned active ingredients, i.e., unsaturated oxo fatty acid or its derivative or salt, and hydroxylated fatty acid or its derivative or salt, as well as an unsaturated fatty acid. The unsaturated fatty acid of the present invention does not include unsaturated oxo fatty acid or unsaturated hydroxylated fatty acid. The unsaturated fatty acid contained in the plant fertilizer component absorption enhancer of the present invention is hydrophobic and has low water solubility. As a result, the unsaturated fatty acid of the present invention can impart water-repellent properties to the plant fertilizer component absorption enhancer in the soil, in the fertilizer, and at the inoculation site. In other words, the plant fertilizer component absorption enhancer of the present invention is hardly washed off. As a result, the fertilizer component absorption-enhancing effect lasts for a long period of time.

[0045] The unsaturated oxo fatty acid or a derivative thereof or a salt thereof of the present invention is a compound represented by the following formula (I): HOOC-(R 1 )-CH=CH-C(=O)-R 2 (I) (In the formula, R 1 : a linear or branched, saturated or unsaturated hydrocarbon group containing 6 to 12 carbon atoms R 2 : an alkyl group having 2 to 8 carbon atoms, which may contain one or more branches and / or double bonds) An unsaturated oxo fatty acid having the following structural formula, or a derivative or salt thereof, can be suitably used.

[0046] In one embodiment of the present invention, R in the unsaturated oxo fatty acid 1 The hydrocarbon group has 8 to 10 carbon atoms, and R 2 The number of carbon atoms in the alkyl group is 4 to 6. In another embodiment, R 1 contains a double bond that forms a conjugated double bond with the double bond between the α and β carbons of the carbonyl group in formula (I). 1 is a linear or branched hydrocarbon group having 9 carbon atoms, and R 2 is preferably an alkyl group having 5 carbon atoms.

[0047] The unsaturated oxo fatty acid used in the present invention specifically includes ketooctadecadienoic acid, such as, but not limited to, 9-oxo-10,12-octadecadienoic acid (9-oxoODA), 13-oxo-9,11-octadecadienoic acid (13-oxoODA), 5-oxo-6,8-octadecadienoic acid, 6-oxo-9,12-octadecadienoic acid, 8-oxo-9,12-octadecadienoic acid, 10-oxo-8,12-octadecadienoic acid, 11-oxo-9,12-octadecadienoic acid, 12-oxo-9,13-octadecadienoic acid, and 14-oxo-9,12-octadecadienoic acid, as well as isomers thereof.

[0048] Esters are preferred as derivatives of unsaturated oxo fatty acids. Examples of esters of the unsaturated oxo fatty acids of the present invention include, but are not limited to, methyl esters, ethyl esters, propyl esters, butyl esters, pentyl esters, isopentyl esters, octyl esters, etc. Examples of salts of unsaturated oxo fatty acids include ammonium salts such as ammonium salts and alkylammonium salts such as tetramethylammonium salts, alkaline earth metal salts such as calcium salts and magnesium salts, alkali metal salts such as sodium salts, lithium salts, and potassium salts, and metal salts such as cobalt salts and manganese salts. However, there is no particular limitation as long as the salt is one or more agriculturally acceptable salts, such as salts contained in fertilizers.

[0049] The hydroxylated fatty acid or its derivative or salt thereof used in the present invention is a fatty acid represented by the following formula (II) and / or (III): HOOC-(R 3 )-CH(OH)-CH(OH)-CH=CH-CH(OH)-R 4 (II) HOOC-(R 3 )-CH(OH)-CH=CH-CH(OH)-CH(OH)-R 4 (III) (In the formula, R 3 represents a linear or branched hydrocarbon group having 4 to 12 carbon atoms, which may contain one or more double bonds and / or OH groups, and when a double bond is contained, the position of the double bond is not limited; R 4 is a linear or branched hydrocarbon group having 2 to 8 carbon atoms, which may contain one or more double bonds and / or OH groups, and when it contains a double bond, the position of the double bond is not limited. A hydroxylated fatty acid having the following structural formula, or a derivative thereof, or a salt thereof can be suitably used.

[0050] In one embodiment of the present invention, R in the hydroxylated fatty acid 3 The hydrocarbon group has 6 to 8 carbon atoms, and R 4 In another embodiment, the hydrocarbon group of R in the hydroxylated fatty acid has 4 to 6 carbon atoms. 3 is -(CH2) n -(n is an integer between 4 and 12), and R 4 is C n H 2n+1 -(n is an integer of 2 to 8). 3 is an alkylene group having 7 carbon atoms (-(CH2)7-), and R 4 is preferably an alkyl group having 5 carbon atoms (CH3CH2CH2CH2CH2-).

[0051] Specific examples of hydroxylated fatty acids of the present invention include hydroxyoctadecenoic acids, such as, but not limited to, 9,10,13-trihydroxy-11-octadecenoic acid and / or 9,12,13-trihydroxy-10-octadecenoic acid and their isomers.

[0052] Esters are preferred as derivatives of hydroxylated fatty acids. Examples of esters of hydroxylated fatty acids of the present invention include, but are not limited to, methyl esters, ethyl esters, propyl esters, butyl esters, pentyl esters, isopentyl esters, octyl esters, etc. Examples of salts of hydroxylated fatty acids include ammonium salts such as alkylammonium salts (e.g., ammonium salts, tetramethylammonium salts), alkaline earth metal salts (e.g., calcium salts, magnesium salts), alkali metal salts (e.g., sodium salts, lithium salts, potassium salts), and metal salts (e.g., cobalt salts, manganese salts), but are not particularly limited as long as they are one or more agriculturally acceptable salts, such as salts contained in fertilizers.

[0053] The unsaturated fatty acids (excluding unsaturated oxofatty acids and unsaturated hydroxylated fatty acids) of the present invention are not particularly limited, but unsaturated fatty acids having approximately 10 to 20 carbon atoms may be preferred from the viewpoint of low solubility in water. For example, unsaturated fatty acids having 18 carbon atoms are more preferred. Furthermore, the number of unsaturated bonds in the molecular structure of the unsaturated fatty acids of the present invention is not limited, and they may be monounsaturated fatty acids or polyunsaturated fatty acids. Examples of unsaturated fatty acids include, but are not limited to, oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid. Furthermore, the unsaturated fatty acids may be in the form of free fatty acids or salts thereof (commonly usable salts, such as those exemplified above), and one or more of these may be selected. The unsaturated fatty acids of the present invention may be commercially available products or may be synthesized from commercially available compounds. Furthermore, the unsaturated fatty acids may be one type of unsaturated fatty acid or two or more types.

[0054] When the compounds exemplified in this specification have isomers, all possible isomers can be used in the present invention unless otherwise specified.

[0055] The fertilizer component absorption enhancer for plants of the present invention contains at least one unsaturated oxo-fatty acid or a derivative or salt thereof, and if desired, further contains at least one compound selected from at least one hydroxylated fatty acid or a derivative or salt thereof. In more preferred cases, the fertilizer component absorption enhancer for plants of the present invention contains at least one unsaturated fatty acid (excluding unsaturated oxo-fatty acid and unsaturated hydroxylated fatty acid).

[0056] The plant fertilizer component absorption enhancer of the present invention may contain at least one compound selected from at least one oxo fatty acid selected from 13-oxoODA and 9-oxoODA, or a derivative or salt thereof, and at least one hydroxylated fatty acid selected from 9,10,13-trihydroxy-11-octadecenoic acid and / or 9,12,13-trihydroxy-10-octadecenoic acid, or a derivative or salt thereof, and at least one unsaturated fatty acid selected from oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid.For example, the plant fertilizer component absorption enhancer of the present invention may contain at least one compound selected from ketooctadecadienoic acid, or a derivative or salt thereof, and hydroxyoctadecenoic acid, or a derivative or salt thereof, and at least one unsaturated fatty acid selected from oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid. For example, the plant fertilizer component absorption promoter of the present invention may contain 13-oxo-9,11-octadecadienoic acid, or a derivative or salt thereof, and linoleic acid; it may contain 9,10,13-trihydroxy-11-octadecenoic acid and / or 9,12,13-trihydroxy-10-octadecenoic acid, or a derivative or salt thereof, and linoleic acid; or it may contain 13-oxo-9,11-octadecadienoic acid and / or 9,10,13-trihydroxy-11-octadecenoic acid and / or 9,12,13-trihydroxy-10-octadecenoic acid, or a derivative or salt thereof, and linoleic acid.

[0057] In the present invention, when mixing at least one unsaturated oxo fatty acid or a derivative or a salt thereof with at least one hydroxylated fatty acid or a derivative or a salt thereof, which is added as needed, and at least one unsaturated fatty acid, which is added as needed, it is desirable to use at least one compound selected from the at least one unsaturated oxo fatty acid or a derivative or a salt thereof, the at least one hydroxylated fatty acid or a derivative or a salt thereof, and the at least one unsaturated fatty acid, in order to mix them uniformly. This stabilizer (emulsifier) ensures that the at least one unsaturated fatty acid exists stably as an emulsion in water.

[0058] As the stabilizer (emulsifier), at least one selected from potassium carbonate and dipotassium hydrogen phosphate can be used.

[0059] As described above, the plant fertilizer component absorption enhancer of the present invention contains an unsaturated oxo fatty acid or a derivative or a salt thereof, and optionally a hydroxylated fatty acid or a derivative or a salt thereof, and optionally an unsaturated fatty acid. These unsaturated fatty acids and hydroxylated fatty acids can also exist in nature, so the plant fertilizer component absorption enhancer of the present invention is also extremely excellent in that it imposes little burden on the environment.

[0060] In the plant fertilizer component absorption promoter of the present invention, the weight ratio of the unsaturated oxo fatty acid, or a derivative thereof, or a salt thereof, and the optionally contained hydroxylated fatty acid, or a derivative thereof, or a salt thereof, "unsaturated oxo fatty acid, or a derivative thereof, or a salt thereof" / "hydroxylated fatty acid, or a derivative thereof, or a salt thereof" is preferably 1 / 5 to 5 / 1, and more preferably 1 / 3 to 3 / 1, because this provides excellent fertilizer absorption promoting effects and plant growth promoting effects.

[0061] The unsaturated oxo fatty acid, or a derivative thereof, or a salt thereof, and the hydroxylated fatty acid, or a derivative thereof, or a salt thereof, added as needed, are preferably contained in the plant fertilizer component absorption enhancer of the present invention in an amount of 1% or more by weight relative to the unsaturated fatty acid, because this effectively prevents the unsaturated oxo fatty acid, or a derivative thereof, or a salt thereof, and the hydroxylated fatty acid, or a derivative thereof, or a salt thereof, added as needed, from being washed off in the plant fertilizer component absorption enhancer.

[0062] The plant fertilizer component absorption promoter of the present invention may contain an excipient or carrier as needed. These added components are not particularly limited as long as they are agriculturally acceptable. In addition, other components than the excipient or carrier that are commonly used in pesticide formulations may also be contained.

[0063] The plant fertilizer component absorption enhancer of the present invention can be applied to plants by any method. For example, it can be used as a wettable powder suspended in water, or, for example, as a spray that is brought into contact with plant roots. The plant fertilizer component absorption enhancer of the present invention can also be used as a dipping agent or a soil drench agent. Specific application methods can be appropriately selected depending on the cultivated plant to be applied and the type of use, and examples include ground liquid application, ground solid application, aerial liquid application, aerial solid application, liquid surface application, indoor application, soil incorporation application, soil drench application, surface treatment such as paint treatment, seedling box application, single flower treatment, and base treatment. The plant fertilizer component absorption enhancer of the present invention can also be used as a plant fertilizer by mixing it with plant fertilizer components.

[0064] The plant fertilizer component may be any natural or synthetic chemical that functions as a source of macronutrients and / or micronutrients for the plant, without limitation.

[0065] Examples of macronutrients include at least one selected from the group consisting of nitrogen (N), phosphorus (P), and potassium (K). Examples of micronutrients include at least one selected from the group consisting of calcium (Ca), magnesium (Mg), sulfur (S), zinc (Zn), iron (Fe), manganese (Mn), boron (B), cobalt (Co), molybdenum (Mo), copper (Cu), and nickel (Ni).

[0066] Specifically, the following chemical substances can be used as fertilizer components for the plants.

[0067] Examples of nitrogen fertilizers that can be used include ammonium chloride, ammonium sulfate, ammonium nitrate, ammonium dihydrogen phosphate, urea, and lime nitrogen; examples of phosphorus fertilizers include triple superphosphate (calcium dihydrogen phosphate), superphosphate (a mixture of calcium dihydrogen phosphate and calcium sulfate), dipotassium hydrogen phosphate, and fused phosphate fertilizer; and examples of potassium fertilizers include potassium nitrate, potassium chloride, potassium sulfate, potassium carbonate, and potassium silicate.

[0068] Examples of magnesium fertilizers include magnesium sulfate and magnesium chloride; examples of calcium fertilizers include quicklime, slaked lime, and calcium carbonate; examples of manganese fertilizers include manganese sulfate, manganese magnesium sulfate, and manganese slag; examples of boron fertilizers include boric acid and borates; examples of iron fertilizers include steel slag; examples of copper fertilizers include copper sulfate; examples of cobalt fertilizers include cobalt nitrate and cobalt sulfate; examples of zinc fertilizers include zinc sulfate, zinc sulfide, and zinc oxide; examples of nickel fertilizers include nickel chloride; examples of molybdenum fertilizers include sodium molybdate; and examples of sulfur fertilizers include flowers of sulfur.

[0069] When the plant fertilizer component absorption promoter of the present invention is used in a mixture with such plant fertilizer components, it may be applied to the plant by an application method suitable for each fertilizer component.

[0070] The plants to which the plant fertilizer component absorption promoter of the present invention can be applied are not particularly limited, and can be used effectively for plants in general. For example, it can be suitably applied to plants of the Brassicaceae, Poaceae, Leguminosae, Solanaceae, Rosaceae, Amaranthaceae, or Malvaceae families. Furthermore, the plants to which it can be applied are not limited to wild-type plants, and may be, for example, mutants or transformants. Furthermore, the varieties of each plant are also not particularly limited. [Example]

[0071] The present invention will be described based on examples, but the present invention is not limited to only the examples.

[0072] [Example 1] As the oxo fatty acid or a derivative or salt thereof, 13-oxo-9,11-octadecadienoic acid (13-oxoODA) ((9Z,11E)-13-oxo-9,11-octadecadienoic acid, manufactured by Cayman Chemical Co.), which is a ketooctadecadienoic acid, was used. Furthermore, as the hydroxylated fatty acid or its derivative or salt thereof, a 2:1 mixture of hydroxyoctadecenoic acid, 9,10,13-trihydroxy-11-octadecenoic acid (Larodan Fine Chemicals, 9(S),10(S),13(S)-trihydroxy-11(E)-octadecenoic acid; English notation: 9(S),10(S),13(S)-trihydroxy-11(E)-octadecenoic acid)) and 9,12,13-trihydroxy-10-octadecenoic acid (Larodan Fine Chemicals, 9(S),12(S),13(S)-trihydroxy-10(E)-octadecenoic acid; English notation: 9(S),12(S),13(S)-trihydroxy-10(E)-octadecenoic acid)) was used. Linoleic acid (primary linoleic acid, Fujifilm Wako Pure Chemical Industries, Ltd.) was used as the unsaturated fatty acid. 1 g of linoleic acid was mixed with 0.09 g of 13-oxo-ODA, 0.02 g of 9,10,13-trihydroxy-11-octadecenoic acid, 0.01 g of 9,12,13-trihydroxy-10-octadecenoic acid, and 0.5 g of dipotassium hydrogen phosphate. This mixture was dispersed in water to prepare 16 L of aqueous solution (aqueous dispersion) as a fertilizer component absorption promoter stock solution.

[0073] Rice (variety: Nipponbare) seeds were soaked in water for 5 days in a growing chamber (LH-60FL3-DT: manufactured by Nippon Medical and Chemical Equipment Manufacturing Co., Ltd.) at 15°C with the lights off, and then the temperature was raised to 30°C for half a day. The resulting pigeon-breasted seeds were sown four per cell in a 72-well cell tray containing sterilized seed sowing soil (manufactured by Takii Seed Co., Ltd.). The seeds were grown in the growing chamber under a daily cycle of 14 hours under fluorescent light at 28°C and 10 hours under light at 23°C until they reached the 1- to 1.5-leaf stage.

[0074] The fertilizer component absorption promoter stock solution was diluted 100 times with water and sprayed onto the leaf surface of rice plants 7 days after sowing, at a rate of 1 mL per plant, on 20 plants using a spray bottle.

[0075] Three and 24 hours after spraying, five samples (two plants per sample) were cut from the above-ground parts and weighed (fresh weight: FW) in 15 mL centrifuge tubes with lids, and immediately transferred to a -80°C freezer and frozen for 24 hours.

[0076] A mixture of ethanol, water, and acetic acid (80:20:1) was added to the frozen sample to a concentration of 0.1 g / 1 mL, and the beads were crushed. After that, the sample was sonicated for 10 minutes. The sample was left to stand for 1 hour, and then centrifuged at 3000 rpm for 5 minutes in a centrifuge (himac CT6E, manufactured by Eppendorf-Himac Technologies). The supernatant was filtered through a membrane filter and used as the analytical sample.

[0077] The analytical samples were analyzed using an LC-MS / MS system (LC: DIONEX Ultimate 3000, MS / MS: Q Exactive Focus: Thermo Fisher Scientific) under the following conditions: Column: Aclaim PR-MS 2.1 mm diameter x 150 mm (Thermo Fisher Scientific), Solvent: 2% acetonitrile / acetic acid in water → 95% acetonitrile / acetic acid in water, Flow rate: 0.25 mL / min, Column temperature: 40 °C, Detection: MS-(SIM), Injection: 2 μL of sample solution. Auxin was quantified using a calibration curve prepared using 3-indoleacetic acid (a first-class reagent, Fujifilm Wako Pure Chemical Industries, Ltd.) and the peak area of the MS-. The auxin content in the rice sample was 4.7 ng / gFW 3 h after application of the fertilizer component absorption enhancer, and 5.9 ng / gFW 24 h after application.

[0078] [Comparative Example 1] Seven days after sowing, rice plants were grown in the same manner as in Example 1, and water was sprayed onto the leaf surfaces of 20 plants at 1 mL per plant using a spray bottle.

[0079] Samples were collected, extracted, and analyzed in the same manner as in Example 1, and the amount of auxin contained was quantified.The auxin content in the rice sample 3 hours after water spraying was 3.9 ng / gFW, and the auxin content in the rice sample 24 hours after water spraying was 3.8 ng / gFW.

[0080] [Example 2] In the same manner as in Example 1, a stock solution of the fertilizer component absorption promoter was prepared.

[0081] The fertilizer absorption enhancer stock solution was diluted 50 times with water (Solution A). 21.4 g of urea, 13.4 g of potassium chloride, and 44.9 g of dipotassium hydrogen phosphate (N:P:K = 10:8:27) were dissolved in 1 L of water, and this was further diluted 3,000 times with water (Solution B). 100 mL of Solution A and 100 mL of Solution B were mixed and sprayed on the leaves of 20 rice plants, 1 mL per plant, using a spray bottle 7 days after sowing.

[0082] Samples were collected, extracted, and analyzed in the same manner as in Example 1, and the amount of auxin contained was quantified.The auxin content in the rice sample 3 hours after water spraying was 6.6 ng / gFW, and the auxin content in the rice sample 24 hours after water spraying was 7.6 ng / gFW.

[0083] Comparative Example 2 50 mg of stearic acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) and 150 mg of polyoxyethylene (20) sorbitan monooleate (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) were dispersed in water to prepare 1 L of an aqueous solution (aqueous dispersion) as a control liquid.

[0084] Rice seeds were sown in the same manner as in Example 1 and grown in a climate chamber with a daily cycle of 14 hours at 28°C under fluorescent lights and 10 hours at 23°C without lights, and then the comparative solution was sprayed.

[0085] Samples were collected, extracted, and analyzed in the same manner as in Example 1, and the amount of auxin contained was quantified.The auxin content in the rice sample 3 hours after water spraying was 3.0 ng / gFW, and the auxin content in the rice sample 24 hours after water spraying was 3.1 ng / gFW.

[0086] [Table 1]

[0087] As shown in Table 1, it was found that spraying the fertilizer component absorption promoter of the present invention increased the auxin content in plants. Therefore, it is believed that in plants to which the fertilizer component absorption promoter has been applied, auxin activates the cell membrane proton pump, promoting the absorption of fertilizer components such as potassium and inducing plant elongation. On the other hand, in Comparative Example 1, in which only water was sprayed, and Comparative Example 2, in which a comparative solution containing stearic acid, a straight-chain saturated fatty acid, was sprayed, no increase in auxin content was observed in the plants to which the fertilizer component absorption promoter of the present invention was applied. In Example 2, in which the fertilizer component absorption promoter of the present invention was applied together with commercially available fertilizer components, the auxin content in the plants was further increased. Therefore, by using the fertilizer component absorption promoter of the present invention together with plant fertilizer components, a plant fertilizer with improved fertilizer component absorption efficiency and excellent plant growth-promoting effects can be provided.

Claims

1. A plant fertilizer component absorption promoter comprising an unsaturated oxo fatty acid or a derivative thereof or a salt thereof, The plant fertilizer component is nitrogen, phosphorus or potassium, The fertilizer component absorption promoter is a liquid fertilizer component absorption promoter for plants.

2. The fertilizer component absorption enhancer for plants according to claim 1, further comprising a hydroxylated fatty acid or a derivative or salt thereof.

3. 3. The plant fertilizer component absorption promoter according to claim 1, further comprising an unsaturated fatty acid (excluding unsaturated oxo fatty acid and unsaturated hydroxylated fatty acid).

4. The plant fertilizer component absorption promoter according to any one of claims 1 to 3, wherein the unsaturated oxo fatty acid, or a derivative thereof, or a salt thereof is represented by the following formula (I): HOOC-(R 1 )-CH=CH-C(=O)-R 2 (I) (In the formula, R 1 : a linear or branched, saturated or unsaturated hydrocarbon group containing 6 to 12 carbon atoms, R 2 : an alkyl group having 2 to 8 carbon atoms, which may contain one or more branches and / or double bonds) or a derivative or salt thereof.

5. The plant fertilizer component absorption promoter according to any one of claims 1 to 4, wherein the unsaturated oxo-fatty acid is R 1 The hydrocarbon group has 8 to 10 carbon atoms, and R 2 It is an unsaturated oxo fatty acid in which the alkyl group has 4 to 6 carbon atoms.

6. The plant fertilizer component absorption promoter according to any one of claims 1 to 5, wherein the unsaturated oxo-fatty acid is R 1 is an unsaturated oxo fatty acid containing a double bond which forms a conjugated double bond with the double bond between the α and β carbons of the carbonyl group in formula (I).

7. The plant fertilizer component absorption promoter according to any one of claims 1 to 6, wherein the unsaturated oxo-fatty acid is R 1 is a linear or branched hydrocarbon group having 9 carbon atoms, and R 2 is an unsaturated oxo fatty acid with an alkyl group having 5 carbon atoms.

8. 8. The plant fertilizer component absorption promoter according to claim 1, wherein the unsaturated oxo fatty acid is ketooctadecadienoic acid.

9. 9. The plant fertilizer component absorption promoter according to claim 1, wherein the unsaturated oxo fatty acid is 13-oxo-9,11-octadecadienoic acid.

10. The plant fertilizer component absorption promoter according to any one of claims 2 to 9, wherein the hydroxylated fatty acid or its derivative or salt thereof is represented by the following formula (II) and / or (III): HOOC-(R 3 )-CH(OH)-CH(OH)-CH=CH-CH(OH)-R 4 (II) HOOC-(R 3 )-CH(OH)-CH=CH-CH(OH)-CH(OH)-R 4 (III) (In the formula, R 3 represents a linear or branched hydrocarbon group having 4 to 12 carbon atoms, which may contain one or more double bonds and / or OH groups, and when a double bond is contained, the position of the double bond is not limited; R 4 is a linear or branched hydrocarbon group having 2 to 8 carbon atoms, which may contain one or more double bonds and / or OH groups, and when it contains a double bond, the position of the double bond is not limited. The hydroxylated fatty acid has the structural formula:

11. The plant fertilizer component absorption promoter according to claim 10, wherein the hydroxylated fatty acid is R 3 wherein the hydrocarbon group has 6 to 8 carbon atoms; R 4 The hydrocarbon group has 4 to 6 carbon atoms.

12. The plant fertilizer component absorption promoter according to claim 10 or 11, wherein the hydroxylated fatty acid is R 3 But -(CH 2 ) n -(n is an integer from 4 to 12), R 4 But C n H 2n+1 -(n is an integer of 2 to 8).

13. The plant fertilizer component absorption promoter according to any one of claims 10 to 12, wherein the hydroxylated fatty acid is R 3 is an alkylene group having 7 carbon atoms (-(CH 2 ) 7 -) and R 4 is an alkyl group having 5 carbon atoms (CH 3 CH 2 CH 2 CH 2 CH 2 -).

14. The plant fertilizer component absorption promoter according to any one of claims 2 to 13, wherein the hydroxylated fatty acid is hydroxyoctadecenoic acid.

15. The plant fertilizer component absorption promoter according to any one of claims 2 to 14, wherein the hydroxylated fatty acid is 9,10,13-trihydroxy-11-octadecenoic acid.

16. The plant fertilizer component absorption promoter according to any one of claims 2 to 14, wherein the hydroxylated fatty acid is 9,12,13-trihydroxy-10-octadecenoic acid.

17. The plant fertilizer component absorption promoter according to any one of claims 3 to 16, wherein the unsaturated fatty acid (excluding unsaturated oxo fatty acid and unsaturated hydroxylated fatty acid) is an unsaturated fatty acid having 10 to 20 carbon atoms.

18. 18. The plant fertilizer component absorption promoter according to any one of claims 3 to 17, wherein the unsaturated fatty acid (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids) is a mono- or polyunsaturated fatty acid including at least one selected from the group consisting of oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid.

19. The plant fertilizer component absorption promoter according to any one of claims 3 to 18, wherein the unsaturated fatty acid is linoleic acid.

20. A plant fertilizer comprising the plant fertilizer component absorption promoter according to any one of claims 1 to 19 and the plant fertilizer component.

21. The plant fertilizer component absorption promoter according to any one of claims 1 to 19, which contains water.