WO2020209232A1 - Metal absorption enhancer - Google Patents

Abstract

The present invention addresses the problem of providing a novel metal absorption enhancer for plants. A nitrophenol compound or a salt thereof can enhance the absorption of at least one metal selected from the group consisting of iron, zinc, manganese, copper, molybdenum and nickel. In particular, the present invention relates to: a metal absorption enhancer for plants, which comprises a nitrophenol compound or a salt thereof, wherein the metal comprises at least one metal selected from the group consisting of iron, zinc, manganese, copper, molybdenum and nickel; and others.

Description

Metal absorption accelerator

The present invention relates to a metal absorption accelerator. In particular, the present invention relates to a metal absorption promoter for plants, which contains a nitrophenol compound or a salt thereof.

Various nutritional elements are required for plant growth, and fertilizer plays an important role in cultivation. For example, nitrogen, phosphoric acid, and potash are known as the three major elements of fertilizer. Nitrogen is a component element of protein. Phosphoric acid plays an important role not only in the constituent elements of nucleic acids and phospholipids, but also in energy metabolism, substance synthesis, and decomposition reactions. And potassium has a physiological effect of substance metabolism and mass transfer.

In addition, there are essential elements for plant growth. Specifically, the essential elements are magnesium, sulfur and calcium, which are classified as major elements, and iron, zinc, manganese, copper, and molybdenum, which are classified as trace elements. , Nickel, etc.

Various fertilizers containing such components are used by many agricultural producers, but many of these fertilizer components combine with components in the soil and become insolubilized, resulting in efficient absorption by plants. However, there was a problem that the fertilizer effect commensurate with the application rate was not obtained.

In addition, excessive application of fertilizer causes eutrophication of groundwater, nitrate pollution, phosphate pollution, and soil acidification from the viewpoint of the environment, and stresses the plant from the viewpoint of cultivation and planting. It is known that it can cause harm.

Therefore, in order to improve or prevent problems associated with excessive application of fertilizer, it is desirable to increase the efficiency of selective utilization of fertilizer components, and various developments are being tried to achieve this.

For example, Patent Document 1 discloses a fertilizer absorption accelerator composition containing a surfactant and heptonic acid or a salt thereof. The heptonic acid referred to here is a complex compound having optical activity such as sodium α-glucoheptate.

Therefore, there is a demand for an excellent metal absorption promoter that is inexpensive and has the effect of promoting metal absorption into the plant body.

JP-A-10-53483A

An object of the present invention is to provide a novel metal absorption promoter for plants.

As a result of intensive studies to solve the above problems, the present inventors have found that a metal absorption accelerator containing a nitrophenol compound or a salt thereof promotes a specific metal absorption. The present invention has been completed based on such findings.

That is, the present invention relates to a metal absorption promoter for plants containing the following nitrophenol compound or a salt thereof.
Item 1.
A metal absorption enhancer for plants containing a nitrophenol compound or a salt thereof.
A metal absorption promoter in which the metal is at least one selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel.
Item 2.
Item 2. The metal absorption promoter according to Item 1, wherein the metal is iron and / or zinc.
Item 3.
Item 3. The metal absorption promoter according to Item 1 or 2, wherein the nitrophenol compound or a salt thereof is a compound having one or more nitro groups and one or more hydroxyl groups or a salt thereof.
Item 4.
The nitrophenol compound or a salt thereof
General formula (1):

(In the formula, R is a hydrogen atom, a halogen atom, a C _{1 to 6} alkyl group, a C _{1 to 6} haloalkyl group, a C _{1 to 6} alkoxy group, a C _{1 to 6} haloalkoxy group, a C _{2 to 6} alkoxy group, and a C. _{2 to 6} haloalkoxy groups, C _{2 to 6} alkoxyoxy groups, C _{2 to 6} haloalkoxyoxy groups, C _{2 to 6} alkynyl groups, C _{2 to 6} haloalkynyl groups, C _{2 to 6} alkynyloxy groups, or C _{2 It} shows _{~ 6} haloalkynyloxy groups.
x represents an integer from 1 to 5. y represents an integer from 0 to 4. z represents an integer from 1 to 5.
When y is an integer of 2 to 4, the 2 to 4 R groups may be the same or different, respectively. )
Item 3. The metal absorption promoter according to any one of Items 1 to 3, which is a nitrophenol compound represented by (1) or a salt thereof.
Item 5.
The nitrophenol compound or a salt thereof
The following general formula (2):

(In the formula, R ¹ , R ² , R ³ , R ⁴ , and R ⁵ groups are the same or different, hydrogen atom, halogen atom, hydroxyl group, nitro group, C _{1 to 6} alkyl group, C _{1 to 6} haloalkyl. _{groups, C 1 ~ 6} alkoxy _{groups, C 1 ~ 6} haloalkoxy _{groups, C 2 ~ 6} alkenyl _{groups, C 2 ~ 6} haloalkenyl _{groups, C 2 ~ 6} alkenyloxy _{groups, C 2 ~ 6} haloalkenyloxy groups, C _2-6 alkynyl _{group, C 2-6} haloalkynyl _{group, C 2-6} alkynyloxy group, or an _{C 2-6} haloalkynyl group.
Here, at least one of the R ¹ , R ² , R ³ , R ⁴ , and R ⁵ groups represents a nitro group. )
Item 8. The metal absorption promoter according to any one of Items 1 to 4, which is a nitrophenol compound represented by (1) or a salt thereof.
Item 6.
Item 8. The metal absorption accelerator composition containing the metal absorption accelerator according to any one of Items 1 to 5 and fertilizer.
Item 7.
Item 6. The metal absorption promoter composition according to Item 6, wherein the fertilizer is an organic fertilizer or an inorganic fertilizer.
Item 8.
A method for promoting metal absorption in plants using a nitrophenol compound or a salt thereof.
A method for promoting metal absorption, wherein the metal is at least one selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel.
Item 9.
Item 8. The method for promoting metal absorption according to Item 8, wherein the metal is iron and / or zinc.
Item 10.
A method for promoting metal absorption in a plant, which comprises applying a nitrophenol compound or a salt thereof.
Item 11.
A method for promoting metal absorption in a plant, which comprises treating a plant or its rhizosphere with a nitrophenol compound or a salt thereof.
Item 12.
A method for treating a plant or its rhizosphere with the metal absorption promoter according to any one of Items 1 to 5 or the metal absorption promoter composition according to Item 6 or 7.
Item 13.
A method of using a nitrophenol compound or a salt thereof to promote metal absorption into plants.
The method of use, wherein the metal is at least one selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel.
Item 14.
Item 13. The method of use according to Item 13, wherein the metal is iron and / or zinc.

According to the present invention, the nitrophenol compound or a salt thereof can promote the absorption of at least one metal selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel into the plant body.

FIG. 1 is a diagram showing the result of reducing the iron concentration (iron residual ratio) in the culture solution by the effect of the metal absorption promoter of the present invention, that is, the result of promoting the absorption of iron to plants. .. FIG. 2 is a diagram showing the result of reducing the zinc concentration (zinc residual ratio) in the culture solution by the effect of the metal absorption promoter of the present invention, that is, the result of promoting the absorption of zinc in plants. .. FIG. 3 is a diagram showing the result of reducing the iron concentration (iron residual ratio) in the culture solution by the effect of the metal absorption promoter of the present invention, that is, the result of promoting the absorption of iron to plants. .. FIG. 4 is a diagram showing the result of reducing the zinc concentration (zinc residual ratio) in the culture solution by the effect of the metal absorption promoter of the present invention, that is, the result of promoting the absorption of zinc in plants. .. FIG. 5 is a diagram showing the results of an increase in the iron and zinc content analysis values in crops due to the effect of the metal absorption promoter of the present invention under condition C (Example 6). FIG. 6 is a diagram showing the results of an increase in the iron and zinc content analysis values in crops due to the effect of the metal absorption promoter of the present invention under condition D (Example 7). FIG. 7 is a diagram showing the results of an increase in the iron content analysis value in crop fruits due to the effect of the metal absorption promoter of the present invention. FIG. 8 is a diagram showing the results of an increase in the zinc content analysis value in crop fruits due to the effect of the metal absorption promoter of the present invention.

1. 1. Metal Absorption Accelerator The metal absorption enhancer of the present invention is derived from iron, zinc, manganese, copper, molybdenum, and nickel for plants (which can be paraphrased as in plants, plants, crops, and crops). It is possible to promote absorption of at least one kind of metal (which can be rephrased as a trace metal or a trace element) selected from the above group. The metal absorption promoter of the present invention (sometimes simply referred to as "metal absorption promoter", "metal absorption enhancer", or "fertilizer absorption promoter") contains a nitrophenol compound or a salt thereof. Metal can also be rephrased as mineral.

Nitrophenol compound or salt thereof In the present specification, the nitrophenol compound refers to an aromatic ring compound having one or more nitro groups and one or more hydroxyl groups (OH groups). The nitrophenol compound includes a phenol compound having one nitro group and a phenol compound having two or more nitro groups. Further, some of these phenol compounds have one hydroxyl group and some have two or more hydroxyl groups. Therefore, the nitrophenol compounds in the present specification include aromatic ring compounds having one nitro group and one hydroxyl group, aromatic ring compounds having one nitro group and two or more hydroxyl groups, and two or more nitro groups and one. Any of an aromatic ring compound having one hydroxyl group and an aromatic ring compound having two or more nitro groups and two or more hydroxyl groups is included.
The aromatic ring constituting the nitrophenol compound is not particularly limited, and examples thereof include a benzene ring, a naphthalene ring, and an anthracene ring.

The nitrophenol compound may further have a substituent other than the above-mentioned nitro group and hydroxyl group.
The substituent is not particularly limited, and is, for example, a halogen atom, a C1 _{to 6} alkyl group, a C1 _{to 6} haloalkyl group, a C1 _{to 6} alkoxy group, a C1 _{to 6} haloalkoxy group, and a C2 _{to 6} alkenyl group. , _{C 2 ~ 6} haloalkenyl _{groups, C 2 ~ 6} alkenyloxy _{groups, C 2 ~ 6} haloalkenyloxy _{groups, C 2 ~ 6} alkynyl _{groups, C 2 ~ 6} haloalkynyl _{groups, C 2 ~ 6} alkynyloxy groups, C Examples thereof include _{2 to 6} haloalkynyloxy groups.

The nitrophenol compound in the present specification may form a salt. That is, the metal absorption promoter of the present invention may be a salt of a nitrophenol compound as well as a nitrophenol compound.

The salt in the present specification is not particularly limited, and is, for example, an alkali metal salt (sodium salt, potassium salt, etc.), an alkaline earth metal salt (calcium salt, magnesium salt, etc.), an ammonium salt (ammonia; morpholin, piperidine, etc.). Pyrrolidine, lower mono, di or trialkylamine, lower mono, organic amine such as di or trihydroxyalkylamine) and the like. The preferred salt of the nitrophenol compound is a water-soluble salt, more preferably an agrochemically acceptable salt, and particularly preferably an alkali metal salt.

Among the nitrophenol compounds, a phenol compound having one nitro group is preferable. Further, the aromatic ring constituting the nitrophenol compound is preferably a benzene ring.

Among the nitrophenol compounds, examples of the nitrophenol compound having a benzene ring as an aromatic ring include the following general formula (1):

(In the formula, R is a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, a C _{1 to 6} alkyl group, a C _{1 to 6} haloalkyl group, a C _{1 to 6} alkoxy group, a C _{1 to 6} haloalkoxy group, and a C _{2 to. 6} Alkoxy group, C _{2 to 6} haloalkoxy group, C _{2 to 6} alkoxyoxy group, C _{2 to 6} haloalkoxyoxy group, C _{2 to 6} alkynyl group, C _{2 to 6} haloalkynyl group, C _{2 to 6} alkynyloxy group, or an _{C 2 ~ 6} haloalkynyloxy group.
x represents an integer from 1 to 5. y represents an integer from 0 to 4. z represents an integer from 1 to 5.
When y is an integer of 2 to 4, the 2 to 4 R groups may be the same or different, respectively. )
Examples thereof include a nitrophenol compound represented by and a salt thereof.

The nitrophenol compound represented by the general formula (1) has one (x = 1) phenol compound (mono-nitrophenols) having one nitro group and two or more nitro groups. (X ≧ 2) Phenol compounds (multi-nitrophenols) are included. Further, phenol compounds having one nitro group (mono-nitrophenols) include (x = 1 and z = 1) benzene (mono-nitrophenol) having one nitro group and one hydroxyl group. Benzene (mono-nitropolyphenol) having one nitro group and two or more hydroxyl groups (x = 1 and z ≧ 2) is included. In addition, phenol compounds having two or more nitro groups (multi-nitrophenols) include (x ≧ 2 and z = 1) benzene (multi-nitro) having two or more nitro groups and one hydroxyl group. Phenol) and benzene (multinitropolyphenol) having two or more nitro groups and two or more hydroxyl groups (x ≧ 2 and z ≧ 2). Among these, a phenol compound having one nitro group is preferable.

Further, as the nitrophenol compound, the following general formula (2):

(In the formula, R ¹ , R ² , R ³ , R ⁴ , and R ⁵ groups are the same or different, hydrogen atom, halogen atom, hydroxyl group, nitro group, C _{1 to 6} alkyl group, C _{1 to 6} haloalkyl. _{groups, C 1 ~ 6} alkoxy _{groups, C 1 ~ 6} haloalkoxy _{groups, C 2 ~ 6} alkenyl _{groups, C 2 ~ 6} haloalkenyl _{groups, C 2 ~ 6} alkenyloxy _{groups, C 2 ~ 6} haloalkenyloxy groups, C _2-6 alkynyl _{group, C 2-6} haloalkynyl _{group, C 2-6} alkynyloxy group, or an _{C 2-6} haloalkynyl group.
Here, at least one of the R ¹ , R ² , R ³ , R ⁴ , and R ⁵ groups represents a nitro group. )
Examples thereof include a nitrophenol compound represented by and a salt thereof.

The nitrophenol compound represented by the general formula (2), has one nitro group ^{(R 1, R 2, R} 3, R 4, and of ^{R 5} groups, any one of Two or more of the phenol (mono-nitrophenol) whose group is a nitro group and two or more nitro groups (R ¹ , R ² , R ³ , R ⁴ , and R ⁵ ). Phenols (multi-nitrophenols) whose groups are nitro groups are included.

Each group in the present specification will be described below.

The halogen atom is not particularly limited, and examples thereof include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

The C _{1 to 6} alkyl groups are not particularly limited, and are, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, n-. Examples thereof include linear or branched alkyl groups having 1 to 6 carbon atoms such as a pentyl group, an isopentyl group, a neopentyl group, an n-hexyl group and an isohexyl group. In the present specification, "n-" means normal, "s-" means secondary, and "t-" means tertiary.

The C _{1 to 6} haloalkyl groups are not particularly limited, and for example, a fluoromethyl group, a chloromethyl group, a bromomethyl group, an iodomethyl group, a difluoromethyl group, a trifluoromethyl group, a 1-fluoroethyl group, and a 2-fluoroethyl group. , 2-Chloroethyl group, 2,2,2-trifluoroethyl group, pentafluoroethyl, 1-fluoropropyl group, 2-chloropropyl group, 3-fluoropropyl group, 3-chloropropyl group, 1-fluorobutyl group , 1 to 9 groups such as 1-chlorobutyl group and 4-fluorobutyl group, preferably linear or branched alkyl groups having 1 to 6 carbon atoms substituted with 1 to 5 halogen atoms.

The C _{1 to 6} alkoxy groups are not particularly limited, and for example, a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, an s-butoxy group, a t-butoxy group, n. Examples thereof include linear or branched alkoxy groups having 1 to 6 carbon atoms such as a pentyloxy group, an isopentyloxy group, a neopentyloxy group, an n-hexyloxy group and an isohexyloxy group.

The C _{1 to 6} haloalkoxy groups are not particularly limited, and for example, a fluoromethoxy group, a chloromethoxy group, a bromomethoxy group, an iodomethoxy group, a difluoromethoxy group, a trifluoromethoxy group, a 1-fluoroethoxy group, and a 2- Fluoroethoxy group, 2-chloroethoxy group, 2,2,2-trifluoroethoxy group, pentafluoroethoxy, 1-fluoropropoxy group, 2-chloropropoxy group, 3-fluoropropoxy group, 3-chloropropoxy group, 1 -Linear or branched alkoxy having 1 to 6 carbon atoms substituted with 1 to 9, preferably 1 to 5 halogen atoms such as a fluorobutoxy group, a 1-chlorobutoxy group, a 4-fluorobutoxy group, etc. Group can be mentioned

The C2 _{to 6} alkenyl group is not particularly limited, and for example, a vinyl group, a 1-propenyl group, an allyl group, an isopropenyl group, a 1-butenyl group, a 2-butenyl group, a 3-butenyl group, and a 1-methyl- Examples thereof include a linear or branched alkenyl group having 2 to 6 carbon atoms such as a 2-propenyl group and a 1,3-butadienyl group.

The C2 _{to 6} haloalkenyl group is not particularly limited, and for example, a 2,2-dichlorovinyl group, a 2,2-dibromovinyl group, a 3-chloro-2-propenyl group, and a 3,3-difluoro-2- Allyl group, 3,3-dichloro-2-allyl group, 4-chloro-2-butenyl group, 4,4,4-trifluoro-2-butenyl group, 4,4,4-trichloro-3-butenyl group, A linear or branched alkenyl group having 2 to 6 carbon atoms having at least one double bond at an arbitrary position such as a 5-chloro-3-pentenyl group and a 6-fluoro-2-hexenyl group. Examples thereof include an alkenyl group substituted with 1 to 13, preferably 1 to 7 halogen atoms.

The C2 _{to 6} alkenyloxy groups are not particularly limited, and are, for example, vinyloxy group, 1-propenyloxy group, allyloxy group, isopropenyloxy group, 1-butenyloxy group, 2-butenyloxy group, 3-butenyloxy group, 1 Examples thereof include a linear or branched alkenyloxy group having 2 to 6 carbon atoms such as a methyl-2-propenyloxy group and a 1,3-butadienyloxy group.

The C2 _{to 6} haloalkenyloxy groups are not particularly limited, and for example, 2,2-dichlorovinyloxy group, 2,2-dibromovinyloxy group, 3-chloro-2-propenyloxy group, 3,3-. Difluoro-2-allyloxy group, 3,3-dichloro-2-allyloxy group, 4-chloro-2-butenyloxy group, 4,4,4-trifluoro-2-butenyloxy group, 4,4,4-trichloro-3 -Linear or branched chain with 2 to 6 carbon atoms having at least one double bond at any position such as a butenyloxy group, 5-chloro-3-pentenyloxy group, 6-fluoro-2-hexenyloxy group, etc. Examples of the alkenyl group include an alkenyl group substituted with 1 to 13, preferably 1 to 7 halogen atoms.

Examples of the C2 _{to 6} alkynyl group include carbons such as ethynyl group, 1-propynyl group, 2-propynyl group, 1-methyl-2-propynyl group, 1-butynyl group, 2-butynyl group and 3-butynyl group. Examples thereof include linear or branched alkynyl groups of numbers 2 to 6.

The C2 _{to 6} haloalkynyl group is not particularly limited, and for example, 3,3,3-trifluoropropynyl group, 3,3-difluoropropynyl group, 3,3,3-trifluorobutynyl group, 4, A linear or branched alkynyl group having 2 to 6 carbon atoms having at least one triple bond at an arbitrary position such as a 4,4-trifluoro-2-butynyl group and a 3,3-difluoro-butynyl group. Examples thereof include alkynyl groups substituted with 1 to 13, preferably 1 to 7 halogen atoms.

The C2 _{to 6} alkynyloxy group is not particularly limited, and for example, ethynyloxy group, 1-propynyloxy group, 2-propynyloxy group, 1-methyl-2-propynyloxy group, 1-butynyloxy group, 2- Examples thereof include linear or branched alkynyloxy groups having 2 to 6 carbon atoms such as butynyloxy groups and 3-butynyloxy groups.

The C2 _{to 6} haloalkynyloxy group is not particularly limited, and for example, 3,3,3-trifluoropropynyloxy group, 3,3-difluoropropynyloxy group, 3,3,3-trifluorobutynyloxy group. A linear or branched chain having 2 to 6 carbon atoms having at least one triple bond at an arbitrary position such as a group, a 4,4,4-trifluoro-2-butynyloxy group, a 3,3-difluoro-butynyloxy group, etc. Examples of the alkynyloxy group include an alkynyloxy group substituted with 1 to 13, preferably 1 to 7 halogen atoms.

In the nitrophenol compound represented by the general formula (1) or a salt thereof, R is preferably a hydrogen atom, a halogen atom, a C _{1 to 6} alkyl group or a C _{1 to 6} alkoxy group, and is preferably a hydrogen atom or a methoxy. Groups are more preferred.

In the nitrophenol compound represented by the general formula (2) or a salt thereof, R ¹ is preferably a hydrogen atom, a halogen atom, a nitro group, a C _{1 to 6} alkyl group or a C _{1 to 6} alkoxy group. A hydrogen atom, a nitro group, or a methoxy group is more preferable.

In the nitrophenol compound represented by the general formula (2) or a salt thereof, R ² is preferably a hydrogen atom, a halogen atom, a nitro group, a C _{1 to 6} alkyl group or a C _{1 to 6} alkoxy group. A hydrogen atom, a nitro group, or a methoxy group is more preferable.

In the nitrophenol compound represented by the general formula (2) or a salt thereof, R ³ is preferably a hydrogen atom, a halogen atom, a nitro group, a C _{1 to 6} alkyl group or a C _{1 to 6} alkoxy group. A hydrogen atom, a nitro group, or a methoxy group is more preferable.

In the nitrophenol compound represented by the general formula (2) or a salt thereof, R ⁴ is preferably a hydrogen atom, a halogen atom, a nitro group, a C _{1 to 6} alkyl group or a C _{1 to 6} alkoxy group. A hydrogen atom, a nitro group, or a methoxy group is more preferable.

In the nitrophenol compound represented by the general formula (2) or a salt thereof, R ⁵ is preferably a hydrogen atom, a halogen atom, a nitro group, a C _{1 to 6} alkyl group or a C _{1 to 6} alkoxy group. A hydrogen atom, a nitro group, or a methoxy group is more preferable.

Among the above nitrophenol compounds or salts thereof, nitrophenol compounds such as 4-nitrophenol, 4-nitrophenol sodium salt, 3-nitrophenol, 3-nitrophenol sodium salt, 2-nitrophenol, 2-nitrophenol sodium salt and the like. Or salts thereof; and / or guaiacol (also known as guaiacol) compounds such as 5-nitroguaiacol, 5-nitroguaiacol sodium salt, 4-nitroguaiacol, 4-nitroguaiacol sodium salt or salts thereof are particularly preferred.

Among the nitrophenol compounds represented by the general formula (2) or salts thereof, preferred compounds are
R ¹ is a hydrogen atom, a nitro group, or a methoxy group,
R ² is a hydrogen atom, a nitro group, or a methoxy group,
R ³ is a nitro group,
A nitrophenol compound in which R ⁴ is represented by a hydrogen atom, a nitro group, or a methoxy group, and R ⁵ is represented by a hydrogen atom, a nitro group, or a methoxy group, or a salt thereof;
R ¹ is a nitro group,
R ² is a hydrogen atom, a nitro group, or a methoxy group,
R ³ is a hydrogen atom, a nitro group, or a methoxy group,
R ⁴ is a hydrogen atom, a nitro group, or a methoxy group, and R ⁵ is a nitrophenol compound represented by a hydrogen atom, a nitro group, or a methoxy group or a salt thereof; and R ¹ is a hydrogen atom, a nitro group, Or methoxy group,
R ² is a hydrogen atom, a nitro group, or a methoxy group,
R ³ is a hydrogen atom, a nitro group, or a methoxy group,
R ⁴ is a nitro group,
R ⁵ is a nitrophenol compound represented by a hydrogen atom, a nitro group, or a methoxy group, or a salt thereof.

Among the nitrophenol compounds represented by the general formula (2) or salts thereof, more preferable compounds are
R ¹ is a hydrogen atom or a methoxy group,
R ² is a hydrogen atom or a methoxy group,
R ³ is a nitro group,
R ⁴ is a hydrogen atom or a methoxy group, and R ^5, nitrophenol compound represented by hydrogen atom, or a methoxy group;
R ¹ is a nitro group,
R ² is a hydrogen atom or a methoxy group,
R ³ is a hydrogen atom or a methoxy group,
R ⁴ is a hydrogen atom or a methoxy group, and R ⁵ is a nitrophenol compound represented by a hydrogen atom or a methoxy group or a salt thereof; and R ¹ is a hydrogen atom or a methoxy group.
R ² is a hydrogen atom or a methoxy group,
R ³ is a hydrogen atom or a methoxy group,
R ⁴ is a nitro group, and R ⁵ is a nitrophenol compound represented by a hydrogen atom or a methoxy group or a salt thereof.

And particularly preferable nitrophenol compound or salt thereof is 4-nitrophenol or a salt thereof, 2-nitrophenol or a salt thereof, and / or 5-nitroguaiacol or a salt thereof.

The metal absorption promoter of the present invention may contain one or more nitrophenol compounds or salts thereof.

As one or more of these nitrophenol compounds or salts thereof, a compound produced by a known production method or a commercially available product can be used. Examples of the known production method include the production method described in JP-A-10-67716. Commercially available products include, for example, 4-nitrophenol or a salt thereof (0.3%), 2-nitrophenol or a salt thereof (0.2%), and 5-nitroguaiacol or a salt thereof (0.1%). A nitrophenol composition containing 2 or 3 types of nitrophenol compounds such as an aqueous solution containing) or a salt thereof can also be used.

The metal absorption promoter of the present invention may be treated by any method as long as it is a method for treating the above-mentioned metal absorption promoter on the above-ground part of the plant or its rhizosphere. The concentration of the nitrophenol compound or salt thereof used is usually 0.0001 to 1000 mg / L, preferably 0.001 to 100 mg / L, and more preferably 0.01 to 10 mg / L. Further, when two or more kinds of nitrophenol compounds or salts thereof are contained in the treatment of the metal absorption promoter of the present invention, the respective concentrations and ratios can be appropriately set.

The metal is at least one metal selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel. Preferred metals are iron and zinc.

Other Components The metal absorption accelerator of the present invention may contain only a nitrophenol compound or a salt thereof without adding other components, but is usually a solid carrier, a liquid carrier, or a gaseous carrier (propellant). ) Can be mixed.

In addition, if necessary, a surfactant and other formulation auxiliary agents are added to the metal absorption enhancer of the present invention, and an oil agent, an emulsion, a wettable powder, a flowable agent, etc. are added according to a usual formulation method. It can be formulated and used in granules, powders, aerosols, fumes and the like.

The preparation using the metal absorption promoter of the present invention includes other insecticides, nematodes, acaricides, fungicides, herbicides, microbial pesticides, plant growth regulators, synergists, soil conditioners, and fertilizers. Etc. may be mixed or not mixed and used at the same time.

The content of the nitrophenol compound or a salt thereof in these preparations is usually 0.00001 to 95% by weight, preferably 0.0001 to 50% by weight, and more preferably 0.001 to 10% by weight.

Examples of the solid carrier used in the formulation include clays (kaolin clay, diatomaceous earth, synthetic silicon hydroxide-containing silicon hydroxide, bentonite, fubasami clay, acidic white clay, etc.), talc, ceramics, and other inorganic minerals (selite, quartz, etc.). Examples thereof include fine powders or granules such as sulfur, activated charcoal, calcium carbonate, hydrated silica, etc.), chemical fertilizers (sulfur, phosphorus, silica, urea, salt, etc.).

Examples of the liquid carrier include water, alcohols (methanol, ethanol, etc.), ketones (acetone, methyl ethyl ketone, etc.), aromatic hydrocarbons (benzene, toluene, xylene, ethylbenzene, methylnaphthalene, etc.), aliphatic hydrocarbons. Classes (hexane, cyclohexane, kerosene, light oil, etc.), esters (ethyl acetate, butyl acetate, etc.), nitriles (acetritale, isobutyronitrile, etc.), ethers (diisopropyl ether, dioxane, etc.), acid amides (N) , N-dimethylformamide, N, N-dimethylacetamide, etc.), halogenated hydrocarbons (benzene, trichloroethane, carbon tetrachloride, etc.), dimethylsulfoxide, soybean oil, vegetable oils such as cottonseed oil, and the like.

Examples of the gaseous carrier include butane gas, LPG (liquefied petroleum gas), dimethyl ether, carbon dioxide gas and the like.

Examples of the surfactant include alkyl sulfate esters, alkyl sulfonates, alkyl aryl sulfonates, alkyl aryl ethers and their polyoxyethylene products, polyethylene glycol ethers, polyhydric alcohol esters, sugar alcohol derivatives and the like. Can be mentioned.

Examples of the auxiliary agent for the preparation include a fixing agent, a dispersant, a stabilizer and the like.

Examples of the fixing agent and / or dispersant include casein, gelatin, polysaccharides (starch powder, gum arabic, cellulose derivatives, alginic acid, etc.), lignin derivatives, bentonites, sugars, synthetic water-soluble polymers (polyvinyl alcohol, polyvinylpyrrolidone, etc.). , Polyacrylic acids, etc.).

Stabilizers include, for example, PAP (isopropyl acid phosphate), BHT (2,6-di-tert-butyl-4-methylphenol), BHA (2-tert-butyl-4-methoxyphenol and 3-tert- Butyl-4-methoxyphenol mixture), vegetable oils, mineral oils, fatty acids or esters thereof and the like.

The metal absorption accelerator of the present invention and the preparation using the same can be used as it is or diluted with water or the like.

These application doses and application concentrations vary depending on the type of preparation, application time, application location, application method, pest type, degree of damage, etc., and may be increased without being limited to the above range. It can be reduced.

Although it has been described that the metal absorption enhancer of the present invention contains a nitrophenol compound or a salt thereof and is used thereof, a composition containing the nitrophenol compound or a salt thereof and other components separately is prepared. In addition, these two or more kinds of components may be used sequentially or simultaneously, preferably simultaneously at the time of application. In this case, the nitrophenol compound or a salt thereof, and other components should be used in the same proportion as described above.

2. Metal Absorption Accelerator Composition The metal absorption accelerator of the present invention can further contain a fertilizer to prepare a metal absorption accelerator composition.
The fertilizer in the present specification is not particularly limited, and is, for example, three major elements (N, P, K), a large amount element (Mg, S, Ca), or a trace element (Mn, B, Fe, Zn, Cu). , Mo, Cl, Ni) Examples include any natural or synthetic chemicals (fertilizers) that function as sources. These chemical substances (compounds) can be mixed in any proportion in the metal absorption enhancer of the present invention. The natural or synthetic fertilizer also includes the meaning of inorganic fertilizer or organic fertilizer (for example, bonito soluble).

The content of the nitrophenol compound or a salt thereof in these preparations is usually 0.00001 to 95% by weight, preferably 0.0001 to 50% by weight, and more preferably 0.001 to 10% by weight.

The content of fertilizer is not particularly limited, and is usually 0.00001 to 99% by weight.

These application doses and application concentrations vary depending on the type of formulation, application time, application location, application method, pest type, degree of damage, etc., and may be increased or decreased without being limited to the above range. Can be made to.

It has been described that the metal absorption promoter composition of the present invention contains a nitrophenol compound or a salt thereof and a fertilizer and uses the nitrophenol compound or a salt thereof, but the nitrophenol compound or a salt thereof, the fertilizer and other components are separately separated. The composition contained in the above may be prepared, and these two or more kinds of components may be used sequentially or simultaneously, preferably simultaneously at the time of application. In this case, the nitrophenol compound or a salt thereof, fertilizer and other components should be used in the same proportion as described above.

3. 3. Uses The useful plants to which the metal absorption promoter or the metal absorption promoter composition of the present invention can be used are not particularly limited, and are, for example, cereals such as rice, barley, wheat, rye, oats, and corn;
Beans such as soybeans, red beans, broad beans, peas, green beans, peanuts;
Fruit trees and fruits such as apples, citrus fruits, pears, grapes, peaches, plums, cherries, walnuts, chestnuts, almonds, bananas, and strawberries;
Cabbage, tomatoes, spinach, broccoli, lettuce, onions, leeks, peppers,
Leaves and fruits and vegetables such as eggplant and pepper;
Root vegetables such as carrots, potatoes, sweet potatoes, taros, radishes, lotus roots, turnips, burdock roots, and garlic;
Processing crops such as sardines, hemp, beets, hops, sugar cane, sugar beets, olives, rubber, coffee, tobacco and tea;
Pumpkins, cucumbers, oriental melons, watermelons, melons and other melons;
Pastures such as orchardgrass, sorghum, timothy, clover, alfalfa;
Koryo turf, bentgrass and other turf;
Fragrance viewing crops such as lavender, rosemary, thyme, parsley, pepper and ginger;
Flowers such as chrysanthemums, roses, carnations, orchids;
Garden trees such as ginkgo, cherry blossoms, and aoki;
It can be used for forest trees such as Abies sachalinensis, spruce, pine, hiba, cedar, and cypress.

The metal absorption-promoting agent or metal absorption-promoting agent composition of the present invention refers to plants or their vicinity, that is, vegetation, particularly stems, leaves, seeds, bulbs or seed potatoes (hereinafter, seeds, bulbs or seed potatoes are simply abbreviated as seeds). .); Can be applied to fruits, etc. Examples of the application method include spraying or spraying on the leaf surface or stem, seed treatment (for example, seeding or seed powder coating of granules), soil application (for example, furrow spraying or furrow spraying of granules, etc.). Can be mentioned.

The metal absorption accelerator or the metal absorption accelerator composition of the present invention can be used in many situations in various aspects thereof. For example, it can be used for agriculture, landscaping, horticulture, hydroponics, forestry, land reclamation (for example, landfill, soil with relatively high salt concentration, etc.).

The metal absorption promoter or the metal absorption promoter composition of the present invention can protect the above-mentioned useful plants by treating the plants or their vicinity.

The metal absorption-promoting agent or metal absorption-promoting agent composition of the present invention is in the vicinity thereof, for example, stems, leaves, seeds, bulbs or seed potatoes (hereinafter, seeds, bulbs or seed potatoes are simply abbreviated as seeds); fruits and the like. Can be applied to. Examples of the application method include spraying or spraying on the leaf surface or stem, seed treatment (for example, seeding or seed powder coating of granules), soil application (for example, furrow spraying or furrow spraying of granules, etc.). Can be mentioned.

4. Method Another aspect of the present invention is a method for promoting metal absorption into a plant using a nitrophenol compound or a salt thereof, wherein the metal is selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel. It is at least one kind of metal absorption promoting method.

Another aspect of the present invention is a method (treatment method) for treating a plant or its rhizosphere with the metal absorption promoter of the present invention or the metal absorption promoter composition of the present invention.

Another aspect of the present invention is a method of using a nitrophenol compound or a salt thereof for promoting metal absorption into a plant.

In the present invention, the rhizosphere of a plant means the soil or other peripheral parts where the roots are affected. For example, the rhizosphere includes soil in dry fields, paddy fields, upland fields, tea gardens, orchards, etc.; seedling raising soil and seedling raising mats in nursery boxes, etc.; hydroponic liquids in hydroponic farms, etc.

Specific methods for applying directly to the roots or seeds include, for example, spraying, smearing, and dipping the metal absorption-promoting agent of the present invention or the metal absorption-promoting agent composition of the present invention onto the roots or seeds. Examples thereof include impregnation treatment, coating treatment, film coating treatment, and pellet coating treatment.

Hereinafter, the present invention will be specifically described with reference to Examples and Test Examples, but the technical scope of the present invention is not limited to these examples.

(Example 1)
[Formulation example]
Formulation A: Undiluted solution of nitrophenol aqueous solution 4-nitrophenol sodium salt (manufactured by Asahi Chemical Industry Co., Ltd.) 9.0 g, 2-nitrophenol sodium salt (manufactured by Asahi Chemical Industry Co., Ltd.) 6.0 g, 5-nitroguayacol sodium salt (manufactured by Asahi Chemical Industry Co., Ltd.) 3.0 g (manufactured by Asahi Chemical Industry Co., Ltd.) was dissolved in 1 L of ultrapure water to prepare an aqueous solvent. This aqueous solvent is hereinafter referred to as "formulation A".

Formulation B: Fertilizer stock solution 1
Tap water was added to 15 kg of OAT House No. 1 (manufactured by OAT Agrio Co., Ltd.) and dissolved to make 100 L. This water solvent is hereinafter referred to as "formulation B".

Formulation C: Fertilizer stock solution 2
Tap water was added to 10 kg of OAT House No. 2 (manufactured by OAT Agrio Co., Ltd.) and dissolved to make 100 L. This aqueous solvent is hereinafter referred to as "formulation C".

Formulation D: Fertilizer stock solution 3
Tap water was added to 15 kg of OAT House S1 (manufactured by OAT Agrio Co., Ltd.) and dissolved to make 100 L. This aqueous solvent is hereinafter referred to as "formulation D".

For the experiment, leaf lettuce (variety: FSL-1001G, purchased from Fujii Seed Co., Ltd.) was tested. A 300-hole urethane mat and a seedling raising box manufactured by M-type Hydroponic Research Institute Co., Ltd. were used for raising seedlings. Sowing was carried out on August 23, 2017, and seedlings were raised and managed in an acrylic house until germination. Specifically, cover the top surface of the mat with newspaper, irrigate the mat with tap water twice a day, remove the newspaper when the cotyledons develop after germination, and continue raising seedlings until September 6. did. Then, 20 kg of tap water was weighed into a 20 L capacity hydroponic pad (length 50 cm, width 40 cm, depth 12 cm), and then 78 mL each of Formulations B and C was added to Hosplus (registered trademark, manufactured by OAT Agrio Co., Ltd.). 2 mL and 202 μL of Formulation A were added and a control group was not added, and then addition and mixing were carried out to prepare a culture solution. The seedlings were transplanted to a styrofoam panel (length 48 cm, width 38 cm, thickness 2 cm) so that the number of seedlings would be 14 strains / sheet in a staggered pattern with a length of 8 cm and a width of 12 cm, and then the seedlings were floated and planted on the culture solution. .. The above was repeated 6 times under each condition. After planting, the crops were cultivated in a stationary state in an acrylic house while being aerated, and the above-ground crops were harvested on October 5.

After preparing the culture solution, about 100 mL was collected from 6 of the planted buds, the EC value was measured, and the average value was calculated. As a result, it was 1.46 dS / m. Further, these were filtered with a 0.2 μm membrane filter, and then the concentrations of dissolved iron and zinc were measured by an ICP emission spectrophotometer. By multiplying the average value of these results by the initial culture solution volume of 20.2 L, the total amount of iron and zinc in the culture solution at the time of planting was calculated according to the following formula 1. Subsequently, on September 21, September 29, and October 5, the water depth of the culture solution in each pad was measured, and the amount of the culture solution was calculated. At the same time, the culture solution under each condition was collected and the same analysis was performed. From these values, the residual ratio of iron and zinc in the culture solution was calculated according to the following formula 2.

Formula 1: [Total amount in culture solution at the time of planting] = [20.2L] × [Measured concentration]

Equation 2: [Residual rate in culture solution (%)] =
100 x [Amount of culture medium at the time of collection] x [Measured concentration of collected sample] / [Total amount of culture solution at the time of planting]

Table 1 below summarizes the iron and zinc residual rates at the time of collecting the culture solution under each condition, and the control group ratio (%) on each day. Of these, the residual rates of iron and zinc at the time of collecting the culture solution are shown in FIGS. 1 and 2, respectively.

<Result>
From the above results, it was confirmed that the residual rate of iron and zinc in the culture solution was reduced by adding the nitrophenol compound or a salt thereof to the culture solution. The reason is considered to be the result of improved absorption into plants. That is, it can be judged that the improvement in the absorption efficiency of iron and zinc by applying the nitrophenol compound or a salt thereof was shown.

(Example 2)
In the experiment, leaf lettuce (variety: FSL-1001G, purchased from Fujii Seed Co., Ltd.) was tested. A 300-hole urethane mat and a seedling raising box manufactured by M-type Hydroponic Research Institute Co., Ltd. were used for raising seedlings. Sowing was carried out on October 2, 2017, and seedlings were raised and managed in an acrylic house until germination. Specifically, cover the top surface of the mat with newspaper, irrigate the mat with tap water twice a day, remove the newspaper when the cotyledons develop after germination, and continue raising seedlings until October 18. did. Then, 20 kg of tap water was weighed into a 20 L capacity hydroponic pad (length 50 cm, width 40 cm, depth 12 cm), and then 39 mL each of Formulations B and C was added to Hosplus (registered trademark, manufactured by OAT Agrio Co., Ltd.). 1 mL, condition A to which 201 μL of preparation A was added, condition B to which 67 μL was added, and a control group not to be added were set, and then addition and mixing were carried out to prepare a culture solution. After transplanting seedlings to a styrofoam panel (length 48 cm, width 38 cm, thickness 2 cm) so that the number of seedlings would be 14 strains / sheet in a staggered pattern with a length of 8 cm and a width of 12 cm, the seedlings were floated and planted on the culture solution. .. The above was repeated under each condition 4 times. After planting, the crops were cultivated in a stationary state in an acrylic house while being aerated, and the above-ground part of the crop was harvested on November 22nd.

After preparing the culture solution, about 100 mL of the planted buds was collected at 4 points, the EC value was measured, and the average value was calculated. As a result, it was 0.81 dS / m for both the group A and the group B. .. Further, these were filtered with a 0.2 μm membrane filter, and then the concentrations of dissolved iron and zinc were measured by an ICP emission spectrophotometer. By multiplying the average value of these results by the initial culture solution volume of 20.1 L, the total amount of iron and zinc in the culture solution at the time of planting was calculated according to the following formula 3. Subsequently, on November 22, the water depth of the culture solution in each pad was measured, and the amount of the culture solution was calculated. At the same time, the culture solution under each condition was collected and the same analysis was performed. From these values, the residual ratio of iron and zinc in the culture solution was calculated according to the following formula 4.

Formula 3: [Total amount in culture solution at the time of planting] = [20.1 L] × [Measured concentration]

Equation 4: [Residual rate in culture solution (%)] =
100 x [Amount of culture medium at the time of collection] x [Measured concentration of collected sample] / [Total amount of culture solution at the time of planting]

Table 2 below summarizes the iron and zinc residual rates at the time of collecting the culture solution under each condition and the control group ratio (%). Of these, the residual rates of iron and zinc at the time of collecting the culture solution are shown in FIGS. 3 and 4, respectively.

<Result>
From the above results, it was confirmed that the residual rate of iron and zinc in the culture solution was reduced by adding the nitrophenol compound or a salt thereof to the culture solution in the same manner even at a fertilizer concentration different from that of Example 1. The reason is considered to be the result of improved absorption into plants. In addition, similar effects were observed when different amounts of nitrophenol were applied. That is, it is considered that the application of the nitrophenol compound or a salt thereof can stably improve the absorption efficiency of iron and zinc.

(Example 3)
In the experiment, leaf lettuce (variety: FSL-1001G, purchased from Fujii Seed Co., Ltd.) was tested. A 300-hole urethane mat and a seedling raising box manufactured by M-type Hydroponic Research Institute Co., Ltd. were used for raising seedlings. Sowing was carried out on April 13, 2018, and seedlings were raised and managed in an acrylic house until germination. Specifically, cover the top surface of the mat with newspaper, irrigate the mat with tap water twice a day, remove the newspaper when the cotyledons develop after germination, and continue raising seedlings until April 26. did. Then, 20 kg of tap water was weighed into a 20 L capacity hydroponic pad (length 50 cm, width 40 cm, depth 12 cm), and then 80 mL each of Formulations B and C was added to Hosplus (registered trademark, manufactured by OAT Agrio Co., Ltd.). 2 mL, condition C to add 202 μL of preparation A, 120 mL each of preparations C and D, 2 mL of phosplus (manufactured by OAT Agrio Co., Ltd.), condition D to add 67 μL of preparation A, and a control group without addition. A culture solution was prepared by adding and mixing. After transplanting seedlings to a styrofoam panel (length 48 cm, width 38 cm, thickness 2 cm) so that the number of seedlings would be 14 strains / sheet in a staggered pattern with a length of 8 cm and a width of 12 cm, the seedlings were floated and planted on the culture solution. .. The above was repeated under each condition 4 times. After planting, the crops were cultivated in a stationary state in an acrylic house while being aerated, and the above-ground crops were harvested on May 22.

After preparing the culture solution, the EC values were measured at 3 points of the planted buds and the average value was calculated. As a result, it was 1.47 dS / m for the plot C and 1.95 dS / m for the plot D.

For the above-ground part of the crop harvested from each pad, the above-ground part content was analyzed by the dry ashing method. Specifically, two sets of three growing golden mean strains were selected from the harvested strains, dried under 65 ° C. conditions, and then pulverized with a miller. The obtained pulverized product was accurately weighed in an amount of 1.00 g, preheated, and then subjected to an ashing treatment for 1 hour in an electric furnace under 550 ° C. conditions. To the obtained sample, add 2 mL of concentrated hydrochloric acid, extract while heating, collect the extract with milli-Q (registered trademark) water, filter with filter paper, and then reduce the volume to 100 mL. did. After filtering this solution with a 0.2 μm membrane filter, the concentrations of dissolved iron and zinc were measured by an ICP emission spectrophotometer.

Table 3 below summarizes the results of comparison of the obtained analytical values and the average values with the control plots. Of these, the analytical values for iron and zinc are shown in FIGS. 5 and 6, respectively.

<Result>
As a result, it was confirmed that the iron and zinc contents in the crop were increased under the same cultivation condition C as in Example 1, and the iron and zinc contents in the crop were increased under different fertilizer formulations, fertilizer concentrations and preparation A addition amounts. .. Therefore, the effect of applying nitrophenols on promoting the absorption of iron and zinc was further supported.

(Example 4)
Large tomatoes (variety: Daiyasu Yoshihi) were used in the experiment. After filling a 7.5 cm pot with seedling raising soil (Kumiai horticultural seedling raising soil, Aina No. 1), sowing was carried out on February 2, 2018, and seedlings were raised for 6 weeks in the acrylic house of the Cultivation Research Center of OAT Agrio Co., Ltd. Was done. On March 14, two ridges of elevated beds (width 30 cm, depth 20 cm, length 12 m) filled with coconut husk soil were planted, one as a foliar spray treatment area and the other as a control area. The leaf age of the crop at the time of planting was about 6 leaves. One row was planted at intervals of 170 cm between furrows and 30 cm between plants, and 39 plants in each plot were planted. The plants were attracted alternately on the left and right. One main branch was tailored, leaves were plucked as appropriate, and pinching was not performed. After the flowering period, tomato tone (registered trademark, 4-CPA (parachlorophenoxyacetic acid)) was sprayed at a 100-fold dilution in order to promote fruit set and fruit enlargement, and normal fruits were harvested from mature ones at any time. .. The harvest period was from May 17th to July 12th. A hydroponic soil cultivation system (manufactured by OAT Agrio Co., Ltd.) was used for fertilization and irrigation. As fertilizer prescriptions, OAT House No. 1 (manufactured by OAT Agrio Co., Ltd.) and OAT House No. 2 (manufactured by OAT Agrio Co., Ltd.) were used, and the application was performed after appropriately adjusting the liquid amount and magnification. Separately, pesticides were sprayed each time to control pests and pests to maintain the healthy growth of crops. In the foliar spraying treatment, 10 mL of Formulation A solution and Tween (registered trademark) 80 (manufactured by Tokyo Chemical Industry Co., Ltd.) are added to 10 L of tap water using a power sprayer, and the mixed solution is applied to the crop body. The solution excluding Formulation A was sprayed on the control group. Spraying was carried out at intervals of 2 to 3 weeks as a guide. Specifically, it was held on April 11, April 25, May 9, May 23, June 13, June 27, and July 9. On June 8th, the golden mean fruits of the second stage of fruit set in the second stage were collected, and on July 2, 15 moderate fruits of the sixth stage of fruit set in the optimum harvest time were collected from each plot. The obtained fruits were further distributed as a set of three to an even size, and the shavings were excised. Then, about 10 g of each vertical cross section was cut out, and three pieces were put together in a plastic container and dried by freeze-drying. The obtained dried product was ground with a mortar and pestle. After accurately weighing and weighing 0.50 g of this ground product, it was preheated on an electric stove until the whole became uniformly black. The solid matter obtained after preheating was heated in an electric furnace set at a temperature of 550 ° C. After adding 2 mL of concentrated hydrochloric acid (manufactured by Wako Pure Chemical Industries, Ltd.) to the sample that became uniformly white ash, boiling extraction was performed on an electric stove. The obtained extract was filtered using a filter paper while adding ultrapure water, and the volume was adjusted to 100 mL. Finally, the sample was filtered with a 0.2 μm membrane filter as an analysis sample. For the analysis, the iron and zinc concentrations in the sample were analyzed using an ICP emission spectroscopic analyzer. Subsequent analysis was carried out using each of the obtained sample analysis values to obtain Table 4, FIG. 7 and FIG. 8 below.

 

<Result>
In the analysis samples of fruits of all stages, an increase in iron and zinc contents was confirmed as compared with the control. Therefore, the effect of applying nitrophenols on promoting the absorption of iron and zinc was further supported.

From the above, it was shown that the application of nitrophenols is an effective method that can stably improve the promotion of iron and zinc absorption in crops.

Claims (9)

1. A metal absorption enhancer for plants containing a nitrophenol compound or a salt thereof.
   A metal absorption promoter in which the metal is at least one selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel.
2. The metal absorption promoter according to claim 1, wherein the metal is iron and / or zinc.
3. A metal absorption accelerator composition containing the metal absorption accelerator according to claim 1 or 2 and a fertilizer.
4. The metal absorption accelerator composition according to claim 3, wherein the fertilizer is an organic fertilizer or an inorganic fertilizer.
5. A method for promoting metal absorption in plants using a nitrophenol compound or a salt thereof.
   A method for promoting metal absorption, wherein the metal is at least one selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel.
6. The metal absorption promoting method according to claim 5, wherein the metal is iron and / or zinc.
7. A method for treating a plant or its rhizosphere with the metal absorption promoter according to claim 1 or 2, or the metal absorption promoter composition according to claim 3 or 4.
8. A method of using a nitrophenol compound or a salt thereof to promote metal absorption into plants.
   The method of use, wherein the metal is at least one selected from the group consisting of iron, zinc, manganese, copper, molybdenum, and nickel.
9. The method of use according to claim 8, wherein the metal is iron and / or zinc.

Images