Plant fertilizer component absorption promoter and plant fertilizer containing 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 promoter and a plant fertilizer containing the same.

Background Art

[0002] Techniques for adjusting plant growth have been developed for the purpose of improving the supply efficiency of cereal plants and horticultural plants, etc. In addition to measures such as optimizing temperature conditions and sunlight conditions and fertilization, methods for improving the absorption efficiency of fertilized fertilizer components have been reported.

[0003] Patent Document 1 discloses a plant vigor agent that uses a fatty acid or its derivative or the like to improve at least one of the absorption improvement degrees of nitrate ions, phosphate ions, and potassium ions, which are the main components of a plant fertilizer, by 10% or more.

[0004] However, the plant vigor agent described in Patent Document 1 has not been able to sufficiently improve the absorption efficiency of fertilizer components.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to improve the absorption efficiency of fertilizer components (potassium, phosphorus, nitrogen) in applied plants.

Means for Solving the Problems

[0007] The present invention relates to a plant fertilizer component absorption promoter containing an unsaturated oxo fatty acid or its derivative or its salt.

[0008] The fertilizer component absorption promoter for the plant preferably further contains a hydroxy fatty acid, its derivative or its salt.

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

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

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

[0012] The fertilizer component absorption promoter for the plant, wherein the unsaturated oxo fatty acid 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) of the unsaturated oxo fatty acid. 1 of the unsaturated oxo fatty acid.

[0013] The fertilizer component absorption promoter for the plant, wherein the unsaturated oxo fatty acid has R 1 of the unsaturated oxo fatty acid being a linear or branched hydrocarbon group having 9 carbon atoms, and R 2It is an unsaturated oxo fatty acid with an alkyl group having 5 carbon atoms.

[0014] The plant fertilizer component absorption promoter, wherein the unsaturated oxo fatty acid is keto octadecadienoic acid.

[0015] The plant fertilizer component absorption promoter, wherein the unsaturated oxo fatty acid is 13-oxo-9,11-octadecadienoic acid.

[0016] The plant fertilizer component absorption promoter, wherein the hydroxy fatty acid or its derivative or its salt is 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 is a straight-chain or branched hydrocarbon group having 4 to 12 carbon atoms, which may contain one or more double bonds and / or OH groups, and when containing a double bond, the position of the double bond is not limited, R 4 is a straight-chain or branched hydrocarbon group having 2 to 8 carbon atoms, which may contain one or more double bonds and / or OH groups, and when containing a double bond, the position of the double bond is not limited) It is a hydroxy fatty acid or its derivative or its salt having the structural formula of.

[0017] The plant fertilizer component absorption promoter, wherein the hydroxy fatty acid, the hydrocarbon group of R 3 has 6 to 8 carbon atoms, and the hydrocarbon group of R 4 has 4 to 6 carbon atoms.

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

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

[0020] The plant fertilizer component absorption promoter, wherein the hydroxy fatty acid is hydroxyoctadecenoic acid.

[0021] The plant fertilizer component absorption promoter, wherein the hydroxy fatty acid is 9,10,13-trihydroxy-11-octadecenoic acid.

[0022] The plant fertilizer component absorption promoter, wherein the hydroxy fatty acid is 9,12,13-trihydroxy-10-octadecenoic acid.

[0023] The plant fertilizer component absorption promoter, wherein the unsaturated fatty acid (excluding unsaturated oxo fatty acid and unsaturated hydroxy fatty acid) is an unsaturated fatty acid with 10 to 20 carbon atoms.

[0024] The plant fertilizer component absorption promoter, wherein the unsaturated fatty acid (excluding unsaturated oxo fatty acid and unsaturated hydroxy fatty acid) is a monovalent or polyvalent unsaturated fatty acid containing at least one selected from the group consisting of oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid.

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

[0026] A plant fertilizer comprising the plant fertilizer component absorption promoter and a plant fertilizer component.

[0027] Note that "octadecenoic acid" is also conventionally denoted as "octadecaenoic acid" (for example, see Japanese Patent Application Laid-Open No. 3-14539), and the above-mentioned "9,10,13-trihydroxy-11-octadecenoic acid" is also denoted as "9,10,13-trihydroxy-11-octadecaenoic acid" and "9,10,13-trihydroxyoctadeca-11-enoic acid". Similarly, the above-mentioned "9,12,13-trihydroxy-10-octadecenoic acid" is also denoted as "9,12,13-trihydroxy-10-octadecaenoic acid" and "9,12,13-trihydroxyoctadeca-10-enoic acid". In the examples, the name of the manufacturer is also shown in parentheses. Also, the above explanation applies to all "octadecenoic acids" used in this specification, the claims, the drawings, and the abstract.

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

[0029]

Chemical formula

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

[0031]

Chemical formula

[0032] Note that as derivatives of the unsaturated oxo fatty acid and the hydroxylated fatty acid, esters of the unsaturated oxo fatty acid and the hydroxylated fatty acid are respectively desirable. Also, as salts of the unsaturated oxo fatty acid and the hydroxylated fatty acid, salts such as sodium salt, potassium salt, and ammonium salt can be used as will be described later.

[0033] The plant fertilizer component absorption promoter is preferably used as a spraying agent or dipping agent to be brought into contact with the roots of plants, or a chemical agent for soil perfusion, or is mixed with a plant fertilizer or a fertilizer component of a plant.

[0034] The plant fertilizer component absorption promoter is preferably used for plants selected from the plants of the Brassicaceae family, Gramineae family, Leguminosae family, Solanaceae family, Rosaceae family, Amaranthaceae family, or Malvaceae family.

[0035] The plant fertilizer component absorption promoter of the present invention may be in a liquid state or in a powder state. When it is in a powder state, a water dispersion in which an unsaturated oxo fatty acid or its derivative or its salt (optionally containing a hydroxylated fatty acid or its derivative or its salt and / or an unsaturated fatty acid (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids)) is dispersed is freeze-dried to obtain a powder state.

[0036] Further, it is desirable that a stabilizer is contained in the water dispersion.

[0037] Further, it is desirable that the stabilizer is an emulsifier.

[0038] Furthermore, it is desirable that the emulsifier is 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 potassium, phosphorus, and nitrogen, which are fertilizer components for plants, and promote the growth of plants. In addition, the plant fertilizer containing the plant fertilizer component absorption promoter and the fertilizer component of the plant of the present invention has a high absorption efficiency of the fertilizer component, and thus has a high effect of promoting the growth of plants.

Modes for Carrying Out the Invention

[0040] The plant fertilizer component absorption promoter of the present invention contains an unsaturated oxo fatty acid or its derivative or its salt.

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

[0042] The fertilizer component absorption promoter for plants of the present invention preferably further contains a hydroxylated fatty acid or its derivative or its salt. The hydroxylated fatty acid or its derivative or its salt has an effect of promoting plant growth and can increase the yield of plant bodies such as vegetables, grains, and fruits.

[0043] In addition, in a fertilizer component absorption promoter for plants containing an unsaturated fatty acid (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids) as an active ingredient, washing away from the soil, fertilizer, and the action position of the active ingredient may occur due to rain or the like. Such washing away of the active ingredient by rain, erosion, and other erosive forces may significantly reduce the duration of the fertilizer component absorption promoter for plants.

[0044] The fertilizer component absorption promoter for plants of the present invention contains, in addition to the above-mentioned active ingredients, that is, an unsaturated oxo fatty acid or its derivative or its salt and a hydroxylated fatty acid or its derivative or its salt, further an unsaturated fatty acid. The unsaturated fatty acid of the present invention does not include unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids. The unsaturated fatty acid contained in the fertilizer component absorption promoter for plants of the present invention is hydrophobic and has low water solubility. As a result, the unsaturated fatty acid of the present invention can impart the property of repelling water to the fertilizer component absorption promoter for plants in the soil, fertilizer, and the inoculation site. That is, the fertilizer component absorption promoter for plants of the present invention is hardly washed away. Therefore, the fertilizer component absorption promoting effect persists for a long period.

[0045] As the unsaturated oxo fatty acid or its derivative or its salt of the present invention, the following formula (I): HOOC-(R 1 )-CH=CH-C(=O)-R 2 (I) (wherein R 1 : is a linear or branched, saturated or unsaturated hydrocarbon group containing 6 to 12 carbon atoms R 2 : is 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 structural formula of or a derivative thereof or a salt thereof can be preferably used.

[0046] In one embodiment of the present invention, R in the above unsaturated oxo fatty acid 1 has 8 to 10 carbon atoms in the hydrocarbon group, and R 2 has 4 to 6 carbon atoms in the alkyl group. Further, in another embodiment, R in the above unsaturated oxo fatty acid 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). Furthermore, in another embodiment, R in the above unsaturated oxo fatty acid 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] Specific examples of the unsaturated oxo fatty acid used in the present invention include keto octadecadienoic acid. For example, keto octadecadienoic acid includes, but is 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, 14-oxo-9,12-octadecadienoic acid, and their isomers, etc.

[0048] In addition, as the derivative of the unsaturated oxo fatty acid, an ester is desirable. Examples of the ester of the unsaturated oxo fatty acid of the present invention include, but are not limited to, methyl ester, ethyl ester, propyl ester, butyl ester, pentyl ester, isopentyl ester, octyl ester and the like. Examples of the salt of the unsaturated oxo fatty acid include ammonium salts such as ammonium salt and tetramethylammonium salt, alkylammonium salts such as alkylammonium salts, alkaline earth metal salts such as calcium salt and magnesium salt, and alkali metal salts such as sodium salt, lithium salt and potassium salt, cobalt salt, manganese salt and other metal salts. However, there is no particular limitation as long as it is one or more agriculturally acceptable salts such as salts contained in fertilizers.

[0049] The hydroxylated fatty acid or its derivative or its salt used in the present invention 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 is a linear or branched hydrocarbon group having 4 to 12 carbon atoms, which may contain one or more double bonds and / or OH groups. When containing a double bond, 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. When containing a double bond, the position of the double bond is not limited) A hydroxylated fatty acid or its derivative or its salt having the structural formula can be preferably used.

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

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

[0052] In addition, an ester is desirable as a derivative of the hydroxylated fatty acid. Examples of the ester of the hydroxylated fatty acid of the present invention include, but are not limited to, methyl ester, ethyl ester, propyl ester, butyl ester, pentyl ester, isopentyl ester, octyl ester, etc. Examples of the salt of the hydroxylated fatty acid include ammonium salts such as ammonium salts and alkylammonium salts such as tetramethylammonium salt, alkaline earth metal salts such as calcium salt and magnesium salt, alkali metal salts such as sodium salt, lithium salt and potassium salt, and metal salts such as cobalt salt and manganese salt. However, it is not particularly limited as long as it is one or more agriculturally acceptable salts such as salts contained in fertilizers.

[0053] The unsaturated fatty acids of the present invention (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids) are not particularly limited, but unsaturated fatty acids having about 10 to 20 carbon atoms may be preferable from the viewpoint of low solubility in water. For example, unsaturated fatty acids having 18 carbon atoms are more preferable. In the unsaturated fatty acids of the present invention, the number of unsaturated bonds in the molecular structure is not limited, and it may be a monounsaturated fatty acid or a polyunsaturated fatty acid. For example, examples of the unsaturated fatty acids include, but are not limited to, unsaturated fatty acids such as oleic acid, linoleic acid, oleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid. The unsaturated fatty acids may be in the form of free fatty acids, their salts (salts that can be generally used, such as the salts exemplified above), and one or more of them can be selected. As the unsaturated fatty acids of the present invention, commercially available products may be used, or synthetic products from commercially available compounds may also be used. Further, as the unsaturated fatty acids, one kind of unsaturated fatty acid may be used, or two or more kinds may be used.

[0054] In addition, when isomers exist in the compounds exemplified in this specification, all possible isomers can be used in the present invention unless otherwise specified.

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

[0056] The fertilizer component absorption promoter for plants of the present invention may contain at least one compound selected from at least one oxo fatty acid or its derivative or its salt selected from 13-oxoODA and 9-oxoODA, and at least one hydroxylated fatty acid or its derivative or its salt selected from 9,10,13-trihydroxy-11-octadecenoic acid and / or 9,12,13-trihydroxy-10-octadecenoic acid, and may also contain at least one unsaturated fatty acid selected from oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid. For example, the fertilizer component absorption promoter for plants of the present invention may contain at least one compound selected from keto-octadecadienoic acid or its derivative or its salt and hydroxy-octadecenoic acid or its derivative or its salt, and may also contain at least one unsaturated fatty acid selected from oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid. For example, the fertilizer component absorption promoter for plants of the present invention may contain 13-oxo-9,11-octadecadienoic acid or its derivative or its salt and linoleic acid, may also contain 9,10,13-trihydroxy-11-octadecenoic acid and / or 9,12,13-trihydroxy-10-octadecenoic acid or its derivative or its salt and linoleic acid, and may also 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 its derivative or its salt and linoleic acid.

[0057] In the present invention, when mixing at least one unsaturated oxo fatty acid or its derivative or its salt, at least one hydroxylated fatty acid or its derivative or its salt optionally added, and at least one unsaturated fatty acid optionally added, in order to uniformly mix them, at least one compound selected from the group consisting of the at least one unsaturated oxo fatty acid or its derivative or its salt, and at least one hydroxylated fatty acid or its derivative or its salt, and a stabilizer (emulsifier) for stably presenting the at least one unsaturated fatty acid as an emulsion in water is desirably used.

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

[0059] As described above, the fertilizer component absorption promoter for plants of the present invention contains an unsaturated oxo fatty acid or its derivative or its salt, and optionally a hydroxylated fatty acid or its derivative or its salt, and optionally an unsaturated fatty acid. Since these unsaturated fatty acids and hydroxylated fatty acids can also exist naturally, the fertilizer component absorption promoter for plants of the present invention is also very excellent in terms of low environmental impact.

[0060] In the fertilizer component absorption promoter for plants of the present invention, the content ratio of the unsaturated oxo fatty acid or its derivative or its salt, and optionally the hydroxylated fatty acid or its derivative or its salt contained is desirably "unsaturated oxo fatty acid or its derivative or its salt" / "hydroxylated fatty acid or its derivative or its salt" = 1 / 5 to 5 / 1 by weight ratio, and more preferably 1 / 3 to 3 / 1. This is because it is excellent in the fertilizer absorption promoting effect and the plant growth promoting effect.

[0061] With respect to unsaturated fatty acids, it is preferable that unsaturated oxo fatty acids or their derivatives or their salts, and optionally added hydroxylated fatty acids or their derivatives or their salts, be contained in the fertilizer component absorption promoter for plants of the present invention at a weight ratio of 1% or more. This is because the washing-off of the unsaturated oxo fatty acids or their derivatives or their salts, and optionally added hydroxylated fatty acids or their derivatives or their salts, in the fertilizer component absorption promoter for plants is effectively prevented.

[0062] The fertilizer component absorption promoter for plants of the present invention may optionally contain an excipient or a carrier. These added components are not particularly limited as long as they are agriculturally acceptable agents. Further, components commonly used in agricultural chemical formulations, etc., other than excipients and carriers, may also be contained.

[0063] The fertilizer component absorption promoter for plants 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 it can be used as a spray agent that contacts the roots of plants. Further, the fertilizer component absorption promoter for plants of the present invention may be used as a dipping agent or a soil perfusion agent. The specific application method can be appropriately selected according to the cultivated plants to be applied and the usage form. Examples include surface treatments such as ground liquid spraying, ground solid spraying, aerial liquid spraying, aerial solid spraying, liquid surface spraying, in-facility application, soil mixing application, soil perfusion application, coating treatment, seedling box application, single flower treatment, and plant base treatment. Further, the fertilizer component absorption promoter for plants of the present invention may be mixed with a fertilizer component for plants and used as a fertilizer for plants.

[0064] The fertilizer component for plants is not limited as long as it is any natural or synthetic chemical substance that functions as a source of macronutrients and / or micronutrients for plants.

[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 include ammonium chloride, ammonium sulfate, ammonium nitrate, ammonium dihydrogen phosphate, urea, and calcium nitrate. 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 fertilizers. Examples of potassium fertilizers include potassium nitrate, potassium chloride, potassium sulfate, potassium carbonate, and potassium silicate, etc., which can be used.

[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 ore. Examples of boron fertilizers include boric acid and borate. 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. Examples of sulfur fertilizers include sulfur flowers, respectively.

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

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

Examples

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

[0072] [Example 1] As the oxo fatty acid or its derivative or its salt, 13-oxo-9,11-octadecadienoic acid (13-oxoODA), which is keto octadecadienoic acid ((9Z,11E)-13-oxo-9,11-octadecadienoic acid, manufactured by Cayman Chemical), was used. Also, as the hydroxy fatty acid or its derivative or its salt, 9,10,13-trihydroxy-11-octadecenoic acid, which is hydroxy octadecenoic acid (manufactured by Larodan Fine Chemicals, 9(S),10(S),13(S)-trihydroxy-11(E)-octadecenoic acid (9(S),10(S),13(S)-trihydroxy-11(E)-octadecenoic acid in English notation)), and a mixture of 9,12,13-trihydroxy-10-octadecenoic acid (manufactured by Larodan Fine Chemicals, 9(S),12(S),13(S)-trihydroxy-10(E)-octadecenoic acid (9(S),12(S),13(S)-trihydroxy-10(E)-octadecenoic acid in English notation)) mixed at a ratio of 2:1 were used. As the unsaturated fatty acid, linoleic acid (primary linoleic acid manufactured by Fujifilm Wako Pure Chemical Corporation) was used. To 1 g of linoleic acid, 0.09 g of 13-oxoODA, 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 were added and mixed. This mixture was dispersed in water to prepare a 16 L aqueous solution (aqueous dispersion) as the stock solution of the fertilizer component absorption promoter.

[0073] In an artificial weather machine (LH-60FL3-DT: manufactured by Nippon Medical Chemical Instruments Co., Ltd.), rice (variety: Nipponbare) seeds were immersed in water at a temperature of 15°C in the dark for 5 days, and then the temperature was raised to 30°C for half a day. The obtained pigeon chest-shaped seeds were sown 4 per cell in a 72-well cell tray filled with sterilized seeding soil (manufactured by Takii Seed Co., Ltd.). In the artificial weather machine, with a cycle of 14 hours under a fluorescent lamp at a temperature of 28°C and 10 hours in the dark at a temperature of 23°C per day, the seedlings were grown until they reached the 1 to 1.5 leaf stage.

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

[0075] Three hours and 24 hours after spraying, two plants were taken as one sample, and five samples each were cut at the above-ground part, weighed into centrifuge tubes with a capacity of 15 mL and lids (fresh weight: FW), immediately transferred to a freezer at -80 °C, and frozen for 24 hours.

[0076] To the frozen samples, a mixture of ethanol:water:acetic acid = 80:20:1 was added at a concentration of 0.1 g / 1 mL. After bead crushing, ultrasonic treatment was performed for 10 minutes. This was left standing for 1 hour, and then centrifuged at 3000 rpm for 5 minutes using a centrifuge (himac CT6E: manufactured by Eppendorf Himac Technologies Co., Ltd.). The supernatant was filtered through a membrane filter to obtain an analysis sample.

[0077] The analysis sample was analyzed using an LC-MS / MS apparatus (LC section: DIONEX Ultimate3000, MS / MS section: Q Exactive Focus: manufactured by Thermo Fisher Scientific K.K.) under the following conditions. Column = Aclaim PR-MS 2.1 mm φ × 150 mm (manufactured by Thermo Fisher Scientific K.K.), solvent = 2% acetonitrile / acetic acid water → 95% acetonitrile / acetic acid water, flow rate = 0.25 mL / min, column temperature = 40 °C, detection = MS-(SIM), injection = 2 μL of the sample solution. Auxin was quantified from the peak area value of MS- using a calibration curve of the analytical values obtained using 3-indoleacetic acid (a primary reagent manufactured by Fujifilm Wako Pure Chemical Corporation). The auxin content in the rice sample 3 hours after spraying the fertilizer component absorption promoter was 4.7 ng / g FW, and the auxin content in the rice sample 24 hours after spraying was 5.9 ng / g FW.

[0078] [Comparative Example 1] Using a spray bottle, 1 mL of water per plant was sprayed onto the leaves of rice plants 7 days after sowing, which were grown in the same manner as in Example 1, with 20 plants being sprayed.

[0079] As in Example 1, samples were collected, extracted, and analyzed to quantify the amount of auxin contained. As a result, the auxin content in the rice samples 3 hours after water spraying was 3.9 ng / g FW, and the auxin content in the rice samples 24 hours after water spraying was 3.8 ng / g FW.

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

[0081] The stock solution of the fertilizer component absorption promoter was diluted 50-fold with water (Solution A). A solution prepared by dissolving 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) in 1 L of water was further diluted 3000-fold with water (Solution B). A mixture of 100 mL of Solution A and 100 mL of Solution B was sprayed onto the leaves of 20 rice plants at 1 mL per plant using a spray bottle 7 days after sowing.

[0082] As in Example 1, samples were collected, extracted, and analyzed to quantify the amount of auxin contained. As a result, the auxin content in the rice samples 3 hours after water spraying was 6.6 ng / g FW, and the auxin content in the rice samples 24 hours after water spraying was 7.6 ng / g FW.

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

[0084] Rice grains were sown in the same manner as in Example 1 and grown in an artificial weather chamber with a cycle of 14 hours under a fluorescent lamp at 28°C and 10 hours in the dark at 23°C per day, and the comparative solution was sprayed.

[0085] As in Example 1, samples were collected, extracted, and analyzed to quantify the amount of auxin contained. As a result, the auxin content in the rice samples 3 hours after water spraying was 3.0 ng / g FW, and the auxin content in the rice samples 24 hours after water spraying was 3.1 ng / g FW.

[0086]

Table 1

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

Claims

1. A promoter for promoting the absorption of fertilizer components by plants, which contains an unsaturated oxo fatty acid or its derivative or its salt, wherein the unsaturated oxo fatty acid is 13-oxo-9,11-octadecadienoic acid, and the fertilizer component of the plant is a promoter for promoting the absorption of fertilizer components by plants, which is phosphorus or potassium.

2. The promoter for promoting the absorption of fertilizer components by plants according to Claim 1, further containing a hydroxylated fatty acid or its derivative or its salt, wherein the hydroxylated fatty acid is 9,10,13-trihydroxy-11-octadecenoic acid or 9,12,13-trihydroxy-10-octadecenoic acid.

3. The promoter for promoting the absorption of fertilizer components by plants according to Claim 1 or 2, further containing an unsaturated fatty acid (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids).

4. The promoter for promoting the absorption of fertilizer components by plants according to Claim 3, wherein the unsaturated fatty acid (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids) is an unsaturated fatty acid having 10 to 20 carbon atoms.

5. The promoter for promoting the absorption of fertilizer components by plants according to Claim 3 or 4, wherein the unsaturated fatty acid (excluding unsaturated oxo fatty acids and unsaturated hydroxylated fatty acids) is a monovalent or polyunsaturated fatty acid containing at least one selected from the group consisting of oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid.

6. The promoter for promoting the absorption of fertilizer components by plants according to any one of Claims 3 to 5, wherein the unsaturated fatty acid is linoleic acid.

7. A fertilizer for plants, which contains the promoter for promoting the absorption of fertilizer components by plants according to any one of Claims 1 to 6 and the fertilizer component of the plant.

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