JP2022097560A - Reducer of irrigation water to plant, and method for reducing irrigation water to plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of reducing an irrigation water amount to plants, without substantially generating an unfavorable influence in growth of plants.

SOLUTION: One aspect of the present invention relates to a reducing agent of an irrigation water amount of plants containing acetic acid or its salt, or their solvate as an active ingredient. Another aspect of the invention relates to a preservative of cut flowers that contains acetic acid or its salt or their solvate as an active ingredient. Another aspect of the present invention also relates to an agrochemical composition for reducing the amount of irrigation water to plants, containing acetic acid or its salt or a solvate thereof and one or more agriculturally acceptable components, as well as, a method for reducing an irrigation amount to plants and a method for managing growth of plants.

SELECTED DRAWING: Figure 6

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to an agent for reducing the irrigation amount of a plant containing acetic acid as an active ingredient, and a method for reducing the irrigation amount of the plant.

Water is an essential element along with nutrition in plant growth and life support. For example, in the cultivation of crops, water supply work, i.e. irrigation, is a very important work as it can affect the yield and quality of the crop. However, supplying the necessary water over the cultivation period of the crop is a heavy burden on the farmer in terms of both time and labor. Therefore, if the amount of irrigation of plants can be reduced, the burden on farmers can be reduced, and as a result, the production cost of crops can be reduced.

On the other hand, water shortages due to global climate change in recent years have had a serious impact on agriculture, such as deterioration of crop quality and yield. Excessive water shortage in plants can be a drought stress for plants. In plants, various drought stress-responsive genes exist, and it is suggested that they are involved in the acquisition of resistance to drought stress.

In such a case, it may be possible to avoid the influence of the drought stress by improving the drought stress tolerance of the plant itself. As means for improving the drought stress tolerance of the plant itself, the production of a recombinant plant in which the drought stress responsive gene is modified, and the application of a chemical or biological regulator for improving the drought stress tolerance can be mentioned.

For example, Patent Document 1 is a method for improving the drought stress tolerance of a plant, which comprises a step of applying acetic acid of 10 mM or more to the roots of a plant by irrigation and growing the plant under drought stress conditions. Describe the method. The document states that the method improves the drought stress tolerance of treated plants so that they can grow under drought stress conditions as compared to control plants of the same species cultivated under drought stress conditions and in the absence of acetic acid. Is described.

Non-Patent Document 1 provides a network of drought responses in which plants acquire drought tolerance by stimulating the jasmonic acid signaling pathway and triggering the dynamic conversion of metabolic flux from glycolysis to acetic acid synthesis. Describe. The literature describes that the switch of this network in Arabidopsis is directly dependent on histone deacetylase 6 (HDA6). The document describes that external acetic acid promotes novel jasmonic acid synthesis and acetylation enrichment of histone H4, affecting the preparatory stimulation of the jasmonic acid signaling pathway to plant drought tolerance. The document also describes that the application of external acetic acid improved drought tolerance in Arabidopsis, oilseed rape, maize, rice and wheat plants.

US Pat. No. 9,258,954

Kim, J.M. et al., Nature Plants, Vol. 3, 17097 (2017)

In the cultivation of plants, if the amount of irrigation can be reduced while maintaining the growth of the plants, it is possible to reduce the burden on both the time and labor of the farmers who cultivate the plants. In addition, since the amount of water consumed is reduced, the cost of water can also be reduced. Therefore, reducing the amount of irrigation of the plant can result in a reduction in the production cost of the plant.

In plant cultivation, the amount of irrigation is greatly affected not only by the cultivation environment but also by the amount of water absorption of the plant. Therefore, if the water absorption of the plant can be reduced while maintaining the growth of the plant, the irrigation amount of the plant can be reduced. However, no means has been known for reducing the water absorption of a plant without substantially causing an unfavorable effect on the growth of the plant. For example, as described above, it is known that application of acetic acid can improve drought stress tolerance in plants (Patent Document 1 and Non-Patent Document 1). However, the effect of acetic acid application on plants growing under normal growth conditions, that is, non-dry stress conditions, has not been clarified. For example, it was not clear whether the amount of water absorbed could fluctuate in plants whose drought stress tolerance was improved by the application of acetic acid.

Therefore, it is an object of the present invention to provide a means capable of reducing the amount of irrigation of a plant without substantially causing an unfavorable effect on the growth of the plant.

The present inventor has studied various means for solving the above problems. The present inventor has found that acetic acid, which is involved in the drought stress tolerance of plants, can reduce the water absorption of plants under normal growth conditions, that is, non-dry stress conditions. The present inventor has also found that plants can grow well even when the amount of irrigation is reduced. The present inventor has completed the present invention based on the above findings.

That is, the gist of the present invention is as follows.

(1) An agent for reducing the amount of irrigation of plants, which contains acetic acid or a salt thereof, or a solvate thereof as an active ingredient.
(2) The agent for reducing the amount of irrigation of a plant according to the above embodiment (1), further containing at least one or more solvents containing water and having a pH in the range of 4 to 8.
(3) The embodiment (3), further containing at least one or more solvents containing water, and containing acetic acid or a salt thereof in the range of 0.01 to 0.5% by volume with respect to the total volume, or a solvate thereof. The agent for reducing the irrigation amount of the plant according to 1) or (2).
(4) An agricultural chemical composition for reducing the amount of irrigation of a plant, which comprises acetic acid or a salt thereof, or a solvate thereof, and one or more agriculturally acceptable components.
(5) The agricultural chemical composition according to the above embodiment (4), further containing at least one solvent containing water and having a pH in the range of 4 to 8.
(6) The embodiment (6), further containing at least one or more solvents containing water, and containing acetic acid or a salt thereof in the range of 0.01 to 0.5% by volume with respect to the total volume, or a solvate thereof. The agricultural chemical composition according to 4) or (5).
(7) Apply an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof to a plant, a material for applying to the plant, or a soil, a medium, or a culture medium in which the plant grows. A method of reducing the amount of irrigation of the plant, including the above.
(8) Obtaining one or more information about the growth of plants,
The agent for reducing the amount of irrigation of a plant according to any one of the above embodiments (1) to (3) or the agent according to any one of the above embodiments (4) to (6) based on one or more acquired information. Determining the conditions under which the agricultural chemical composition is applied to the plant, the material for application to the plant, or the soil, medium or culture medium in which the plant grows.
A method for controlling the growth of the plant, including.
(9) A preservative for cut flowers containing acetic acid or a salt thereof, or a solvate thereof as an active ingredient.
(10) The cut flower preservative according to the above embodiment (9), further containing at least one solvent containing water and having a pH in the range of 4 to 8.
(11) The embodiment (11), further containing at least one or more solvents containing water, and containing acetic acid or a salt thereof in the range of 0.01 to 0.5% by volume with respect to the total volume, or a solvate thereof. The preservative for cut flowers according to 9) or (10).

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a means capable of reducing the amount of irrigation of a plant without substantially causing an unfavorable effect on the growth of the plant.

Issues, configurations and effects other than the above will be clarified by the following description of the embodiments.

This specification includes the contents described in the specification and / or drawings of Japanese Patent Application No. 2017-195288, which is the basis of the priority of the present application.

FIG. 1 is a diagram showing the appearance and water absorption of cut flowers in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group. (A): Photograph showing the overall appearance of cut flowers at the start of the test, (b): Photograph showing the overall appearance of cut flowers after 5 days of growth, (c): Photograph showing the overall appearance of cut flowers after 5 days of growth, A photograph showing the vicinity of the cut portion and the appearance of the test solution. FIG. 2 is a diagram showing the appearance of cut flowers in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group. (A): A photograph showing the overall appearance of the cut flower at the start of the test, (b): A photograph showing the overall appearance of the cut flower after 7 days of growth. FIG. 3 is a diagram showing the appearance of cut flowers in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group after growing for 5 days. FIG. 4 is a diagram showing the appearance of pot seedlings in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group after growing for 4 weeks. FIG. 5 is a diagram showing the appearance of pot seedlings in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group after growing for 4 weeks. (A): Photograph showing the overall appearance of pot seedlings in the control group, 0.1% by volume acetic acid treatment group and 0.2% by volume acetic acid treatment group, (b): Fruits formed in the pot seedlings in the 0.2% by volume acetic acid treatment group () A photo showing a mini tomato). FIG. 6 is a diagram showing the viability of tomato plants in the untreated plot, the control plot and the acetic acid-applied plot. FIG. 7 is a diagram showing the appearance of tomato plants in the untreated group, the control group and the acetic acid-applied group during the test period. (A): Photograph of tomato plant in each ward at the time of transplantation, (b): Photograph of tomato plant in each ward on the 15th day after transplantation, (c): Photograph of tomato plant in each ward on 22nd day after transplantation ..

Hereinafter, preferred embodiments of the present invention will be described in detail.

The present inventor has found that acetic acid, which is involved in the drought stress tolerance of plants, can reduce the water absorption of plants under normal growth conditions, that is, non-dry stress conditions. The present inventor has also found that plants can grow well even when the amount of irrigation is reduced. It is a novel finding by the present inventor that the application of acetic acid exerts such an effect under normal growth conditions, that is, under non-drying stress conditions. Therefore, one aspect of the present invention relates to a plant irrigation reducing agent containing acetic acid or a salt thereof, or a solvate thereof as an active ingredient. One embodiment of this embodiment is an agent for reducing water absorption of a plant, which contains acetic acid or a salt thereof, or a solvate thereof as an active ingredient. By applying the agent for reducing the irrigation amount of the plant of this embodiment to the plant, the water absorption amount of the plant can be reduced, and as a result, the irrigation amount of the plant can be reduced.

When the agent for reducing the irrigation amount of a plant according to one aspect of the present invention is applied to a cut flower which is a part of a plant, the cut flower is treated while maintaining its freshness by reducing the irrigation amount and / or the water absorption amount of the cut flower. Can be saved. Therefore, another aspect of the present invention relates to a preservative for cut flowers containing acetic acid or a salt thereof, or a solvate thereof as an active ingredient. By applying the cut flower preservative of this embodiment to the cut flowers, the irrigation amount and / or the water absorption amount of the cut flowers can be reduced, and as a result, the cut flowers can be preserved while maintaining the freshness.

By applying the agent for reducing the irrigation amount of a plant according to one aspect of the present invention to a plant, the irrigation amount and / or the water absorption amount of the plant can be reduced. Further, by applying the cut flower preservative of one aspect of the present invention to the cut flowers, the irrigation amount and / or the water absorption amount of the cut flowers can be reduced, and as a result, the cut flowers can be preserved while maintaining the freshness. .. Therefore, another aspect of the present invention relates to an agricultural chemical preparation or an agricultural chemical containing acetic acid or a salt thereof, or a solvate thereof as an active ingredient. By applying the plant irrigation reducing agent, agricultural chemical agent or pesticide of each aspect of the present invention to the plant, the irrigation amount and / or the plant is substantially free from adverse effects on the growth of the plant. The amount of water absorption can be reduced. In addition, by applying the preservatives, agricultural chemicals or pesticides of the cut flowers of each aspect of the present invention to the cut flowers, the irrigation amount and / or water absorption of the cut flowers is substantially not caused, and the unfavorable influence on the growth of the cut flowers is not substantially caused. The cut flowers can be preserved while reducing the amount and as a result preserving freshness.

In each aspect of the present invention, acetic acid used as an active ingredient is a safe and inexpensive compound used not only for industrial use but also for food use and agricultural use such as wood vinegar. Therefore, by implementing each aspect of the present invention, it is possible to reduce the irrigation amount and / or the water absorption amount of the plant safely and at low cost without substantially causing an unfavorable effect on the growth of the plant. ..

In each aspect of the invention, acetic acid used as an active ingredient includes not only itself but also its salts. The salt of acetic acid is preferably, but is not limited to, a salt with a cation such as sodium ion, potassium ion, calcium ion, magnesium ion, zinc ion, or substituted or unsubstituted ammonium ion. When acetic acid is in the form of the salt, the compound can be used without substantially reducing the irrigation and / or water absorption reducing effect of the plant and the safety to the plant.

In each aspect of the invention, acetic acid used as an active ingredient includes not only itself or salts thereof, but also solvates thereof. The solvent that can form a solvent with acetic acid or a salt thereof is not limited, but is, for example, water, or 1 to 6 such as lower alcohol (for example, methanol, ethanol or 2-propanol (isopropyl alcohol)). (Alcohols with carbon atoms), higher alcohols (eg, alcohols with 7 or more carbon atoms such as 1-heptanol or 1-octanol), organics such as dimethylsulfoxide (DMSO), ethanolamine or ethyl acetate. Solvents or mixtures thereof are preferred. When acetic acid or a salt thereof is in the form of a solvate with the solvent, the compound is used without substantially reducing the effect of reducing the irrigation amount and / or the water absorption amount of the plant and the safety to the plant. can do.

In each aspect of the present invention, "reducing the amount of irrigation of a plant" means that by applying the present invention to a population of plants, inability to grow (death), poor growth (for example, the whole or a part thereof (for example, for example). Unfavorable effects on plant growth, such as whitening or yellowing of leaves or flowers), reduced root length or number of leaves, or lodging), slowed growth, or reduced plant weight or crop yield. Usually 90% or less, preferably 85% or less, more preferably 80% or less, still more preferably 70% or less, particularly preferably Means that the amount of irrigation can be reduced to 50% or less, more preferably 25% or less. By implementing each aspect of the present invention, the irrigation amount of the plant can be reduced to the above range without substantially causing an unfavorable effect on the growth of the plant.

In each aspect of the present invention, "reducing the water absorption of a plant" means that by applying the present invention to a population of plants, inability to grow (death), poor growth (for example, the whole or a part thereof (for example, for example). Unfavorable effects on plant growth, such as whitening or yellowing of leaves or flowers), reduced root length or number of leaves, or lodging), reduced growth rate, or reduced plant weight or crop yield. Usually 90% or less, preferably 85% or less, more preferably 80% or less, still more preferably 70% or less, particularly preferably Means that the water absorption of the plant can be reduced to 50% or less, more preferably 25% or less. By implementing each aspect of the present invention, the water absorption of the plant can be reduced to the above range without substantially causing an unfavorable effect on the growth of the plant.

In each aspect of the present invention, the amount of water irrigation and the amount of water absorption of the plant can be evaluated by the following means, although not limited. For example, the plant of interest is grown in a fixed amount of test solution (containing water and optionally normal nutrients) under normal growing conditions, i.e., non-dry stress conditions. After growing for a certain period of time, the volume of the reduced test solution, that is, the amount of water absorption is measured. The test was carried out using a test solution (test group) containing the irrigation reducing agent, agricultural chemicals or pesticides of each aspect of the present invention, or a test solution (control group) not containing them, and a control was used. Compare the water absorption of the plot with the water absorption of the test plot. The difference between the water absorption of the control group and the water absorption of the test group is estimated as the amount of irrigation that can be reduced in the test group. By such means, the effect of reducing the amount of irrigation and the amount of water absorption in the test plot can be determined.

Alternatively, the irrigation amount and water absorption amount of the plant can be evaluated by the following means. For example, the target plant is grown in a culture medium or soil under normal growth conditions, that is, under non-drying stress conditions, while applying a predetermined amount of test solution at predetermined intervals. The test was carried out using a predetermined amount of a test solution (test group) containing a predetermined amount of a irrigation reducing agent for plants of each aspect of the present invention, an agricultural chemical product or a pesticide, or a test solution (control group) not containing them. do. The difference between the volume of the test solution in the control group and the volume of the test solution in the test group that did not substantially cause an unfavorable effect on the growth of the plant was compared between the plant in the control group and the plant in the test group. Estimate the amount of irrigation and water absorption that can be reduced in the test plot. By such means, the effect of reducing the amount of irrigation and the amount of water absorption in the test plot can be determined.

In each aspect of the present invention, the effect of reducing the irrigation amount and / or the water absorption amount of the plant is an effect on the growth of the plant itself, for example, extension of foliage or root, increase in number of leaves, promotion of flowering or fruiting, flowering or Growth-promoting effects such as increased number of fruits, increased plant weight or crop yield, greening, or promotion of tillering may or may not be included. For example, in each aspect of the present invention, the effect of reducing the irrigation amount and / or the water absorption amount of the plant is to specifically reduce the irrigation amount and / or the water absorption amount of the plant while substantially promoting the growth of the plant. Including. Alternatively, in each aspect of the present invention, the effect of reducing the irrigation amount and / or the water absorption amount of the plant specifically reduces the irrigation amount and / or the water absorption amount of the plant without substantially promoting the growth of the plant. Including that. Both cases are included in the embodiments of each aspect of the present invention.

It has been found that application of acetic acid or a salt thereof, or a solvate thereof to a plant may promote the growth of the plant. Therefore, in a particular embodiment of each aspect of the invention, a plant irrigation reducing agent, agricultural chemical or pesticide can be used to promote plant growth. In this case, promotion of plant growth includes, for example, extension of foliage or root, increase in number of leaves, promotion of flowering or fruiting, increase in number of flowers or fruits, increase in plant weight or crop yield, greening, Or promotion of tillering, especially extension of foliage or root, promotion of flowering or fruiting, or increase in the number of flowers or fruits. In a particular embodiment of each aspect of the invention, the application of a plant irrigation reducing agent, agricultural chemical or pesticide to the plant not only reduces the irrigation and / or water absorption of the plant, but also said. It can promote the growth of plants.

The irrigation reducing agent for plants, preservatives for cut flowers, agricultural chemicals or pesticides according to each aspect of the present invention may be, for example, a solid (for example, powder or granule), a liquid (for example, a solution or suspension), or a gas. It can be used in any form such as. The plant irrigation reducing agent, cut flower preservative, agricultural chemical or pesticide of each aspect of the present invention is preferably used in the form of a liquid such as a solution or suspension. By applying the irrigation reducing agent, agricultural chemical agent or pesticide of each aspect of the present invention to a plant in the above-mentioned form, the irrigation amount of the plant is substantially free from adverse effects on the growth of the plant. And / or the amount of water absorption can be reduced. In addition, by applying the preservatives, agricultural chemicals or pesticides of the cut flowers of each aspect of the present invention to the cut flowers, the irrigation amount and / or water absorption of the cut flowers is substantially not caused, and the unfavorable influence on the growth of the cut flowers is not substantially caused. The cut flowers can be preserved while reducing the amount and as a result preserving freshness.

In the agricultural chemical preparation or pesticide of each aspect of the present invention, acetic acid or a salt thereof, or a solvent thereof may be used alone as an active ingredient, or may be used in combination with one or more agriculturally acceptable ingredients. You may. The agricultural chemical preparation or pesticide according to each aspect of the present invention can be formulated into various dosage forms commonly used in the art, depending on the desired application method. Therefore, the agricultural chemical preparation or pesticide according to each aspect of the present invention is also in the form of an agricultural chemical composition containing acetic acid or a salt thereof, or a solvate thereof, and one or more agriculturally acceptable components. It can also be provided at. Agriculturally acceptable ingredients used in the agricultural chemical composition of this embodiment include solvents or carriers, excipients, binders, solubilizers, stabilizers, thickeners, swelling agents, lubricants, and surfactants. Agents, oily liquids, buffers, bactericides, antifreezes, defoamers, colorants, antioxidants, additives, fertilizers, and additional agents can be mentioned. Agriculturally acceptable solvents or carriers include mineral oil fractions such as water, kerosenes or diesel oils, plant or animal derived oils, cyclic or aromatic hydrocarbons (eg paraffins, tetrahydronaphthalene, alkylated naphthalenes or them). Derivatives of, or alkylated benzenes or derivatives thereof), alcohols (eg methanol, ethanol, propanol, butanol, ethylene glycol, glycerol or cyclohexanol), ketones (eg cyclohexanone), or amines (eg N-methylpyrrolidone), Alternatively, an agriculturally acceptable solvent or liquid carrier such as a mixture thereof is preferable, and at least one or more solvents containing water are more preferable. As the fertilizer, an organic fertilizer such as oil cake or cow dung, or an inorganic fertilizer such as ammonium sulfate, lime nitrogen or fused phosphorus is preferable.

When the irrigation reducing agent, cut flower preservative, agricultural chemical or pesticide of each aspect of the present invention further contains at least one solvent containing water, the irrigation of the plant of each aspect of the present invention. The amount reducing agent, cut flower preservative, agrochemical or pesticide preferably has a pH in the range of 4-8, more preferably 5-7.5, even more preferably 6-7. It is preferable that the irrigation reducing agent, cut flower preservative, agricultural chemical preparation or pesticide of each aspect of the present invention has a pH in the above range at the time of application to the target plant. The pH of plant irrigation reducing agents, cut flower preservatives, agricultural chemicals or pesticides of each aspect of the invention is such as hydrochloric acid, nitric acid, sulfuric acid, sodium hydroxide, potassium hydroxide, aqueous ammonia or ammonium acetate. , Acid, alkali or buffer may be used. Alternatively, the pH is adjusted to the above range by utilizing the pH buffering action of the soil, medium or culture solution to which the irrigation reducing agent of the plant of each aspect of the present invention, the preservative of cut flowers, the agricultural chemical preparation or the pesticide is applied. You may. In this case, even if the pH of the irrigation reducing agent, cut flower preservative, agricultural chemical product or pesticide of each aspect of the present invention is out of the above range before application to the target plant, at the time of application. , Can be adjusted to the pH range. When the pH of the irrigation reducing agent for plants, preservatives for cut flowers, agricultural chemical preparations or pesticides in each aspect of the present invention is out of the above range at the time of application, it is incapable of growing (dead) or poorly growing (for example, of plants). Of a plant, such as whitening or yellowing of the whole or part thereof (eg leaves or flowers), decreased root length or decreased number of leaves, or lodging), decreased growth rate, or decreased plant weight or crop yield. May cause unfavorable effects on growth. The irrigation amount and the irrigation amount of the plant and the irrigation amount of the plant by the agrochemical preparation or the pesticide having the pH in the above range substantially without causing an unfavorable effect on the growth of the plant according to each aspect of the present invention. / Or the amount of water absorption can be reduced. Further, the preservatives, agricultural chemicals or pesticides of the cut flowers according to each aspect of the present invention have the pH in the above range, so that the irrigation amount of the cut flowers and / Alternatively, the amount of water absorbed can be reduced, and as a result, the cut flowers can be preserved while maintaining the freshness.

When the agent for reducing the irrigation amount of the plant in each aspect of the present invention, the preservative for cut flowers, the agricultural chemical preparation or the pesticide further contains at least one solvent containing at least water, the irrigation of the plant in each aspect of the present invention. Volume reducing agents, cut flower preservatives, agricultural chemicals or pesticides are preferably in the range of 0.01-0.5% by volume, more preferably in the range of 0.05-0.5% by volume, even more preferably 0.05-0.2% by volume with respect to total volume. It contains acetic acid or a salt thereof in the range of% or 0.075 to 0.25% by volume, particularly preferably 0.09 to 0.2% by volume, particularly preferably 0.1 to 0.2% by volume, or a solvent thereof. When the content of acetic acid or a salt thereof in an agent for reducing the irrigation amount of a plant, a preservative for cut flowers, an agricultural chemical preparation or a pesticide, or a mixture thereof in each aspect of the present invention exceeds the above upper limit, it cannot grow (growth is not possible). Blight), poor growth (eg, whitening or yellowing of the whole plant or parts thereof (eg leaves or flowers), decreased root length or decreased number of leaves, or lodging), decreased growth rate, or plant weight or It can have unfavorable effects on plant growth, such as reduced crop yields. When the irrigation reducing agent, agricultural chemical preparation or pesticide in each aspect of the present invention has acetic acid or a salt thereof having a content in the above range, or a solvate thereof, an unfavorable effect on the growth of the plant is exerted. The amount of irrigation and / or the amount of water absorbed by the plant can be reduced substantially without occurring. In addition, the preservatives, agricultural chemicals or pesticides of cut flowers according to each aspect of the present invention substantially have an unfavorable effect on the growth of cut flowers by having acetic acid or a salt thereof having a content in the above range, or a solvent thereof. It is possible to reduce the irrigation amount and / or the water absorption amount of the cut flower without causing the cut flower, and as a result, the cut flower can be preserved while maintaining the freshness.

When the agricultural chemical composition of this embodiment contains one or more additives, the additives include organic acids such as citric acid, malic acid and propionic acid, glycine, glutamic acid, isoleucine, proline, methionine and asparagine. Examples include amino acids such as acids, vitamins such as ascorbic acid, α-tocopherol and folic acid, and nucleic acids such as DNA and RNA. Even when the agricultural chemical composition of this embodiment contains one or more additives as described above, the amount of water irrigated and / or the amount of irrigation of the plant does not substantially cause an unfavorable effect on the growth of the plant. The amount of water absorption can be reduced.

When the agricultural chemical composition of this embodiment contains one or more additional agents, the additional agents include auxin, gibberellin, cytokinin, 2-chloroethylphosphonic acid (trade name: Esrel®), carbide, and the like. Examples thereof include plant hormones, phytochemical regulators and pesticides commonly used in the art, including benzyladenin, brassinosteroids, strigolactone, jasmonic acid and the like. Even when the agricultural chemical composition of this embodiment contains one or more additional agents as described above, the amount of water and / or the irrigation of the plant does not substantially cause an unfavorable effect on the growth of the plant. The amount of water absorption can be reduced.

In each aspect of the present invention, the target plant is not particularly limited. Various plants including angiosperms and gymnosperms can be applied with an agent for reducing the irrigation amount of the plant according to each aspect of the present invention, a preservative for cut flowers, an agricultural chemical preparation or a pesticide. In each aspect of the present invention, the plant to be applied is not limited, but for example, a plant of the family Kiku such as Kiku and Gerbera, a plant of the family Kiku such as potato, tomato and eggplant, and rapeseed and abrana. Abranaceae plants such as rice, corn, wheat, sugar cane and barley, legumes such as soybeans, hilgao plants such as asagao, yanagi plants such as poplar, sesame, cassaba and Todaigusa plants such as Jatrofa, Hirugao plants such as sweet potatoes, Mikan plants such as oranges and lemons, Rose plants such as cherry blossoms and roses, Orchid plants such as Kochoran, Lindou plants such as Turkish oyster. Family plants, cherry plants such as cyclamen, violets such as pansies, lily plants such as lilies, hiyus such as tensai, vines such as grapes, hinoki such as cedar and hinoki Plants, Mokusei plants such as olives and kinmokusei, and pine plants such as red pine can be mentioned. The plant is not only the whole plant (ie, a complete plant), but also tissues or organs (eg, cut flowers or vegetative propagation organs such as rhizomes, lump roots, corms or runners), cultured cells and / or callus. It may be a part of the plant. In addition, the irrigation reducing agent, agricultural chemical preparation or pesticide of each aspect of the present invention is the whole or a part thereof (for example, seeds, seedlings or) of the plant at any growth stage including before or after germination. It can be applied to the whole or part of a mature plant). By applying the irrigation reducing agent, agricultural chemical preparation or pesticide of each aspect of the present invention to the plant as described above, the irrigation of the plant is carried out without substantially causing an unfavorable effect on the growth of the plant. The amount and / or the amount of water absorption can be reduced. In addition, by applying the cut flower preservatives, agricultural chemicals or pesticides of each aspect of the present invention to the cut flowers of the plant as described above, the cut flowers can be grown without substantially causing an unfavorable effect on the growth of the cut flowers. The amount of irrigation and / or the amount of water absorption can be reduced, and as a result, the cut flowers can be preserved while maintaining freshness.

The irrigation reducing agent, agricultural chemical preparation or pesticide of each aspect of the present invention is not only the plant itself, but also a material for application to the plant, or a soil, medium or culture from which the plant grows. Can be applied to liquids. Therefore, another aspect of the present invention is to apply an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof to a plant, a material for applying the plant, or a plant from which the plant grows. The present invention relates to a method for reducing the amount of irrigation of the plant, including application to soil, medium or culture medium. In the method of this embodiment, the acetic acid or a salt thereof applied or a solvate thereof may be an agent for reducing the irrigation amount of the plant of each aspect of the present invention having the characteristics described above, an agricultural chemical preparation or a pesticide. It's fine. Further, in the method of this embodiment, the material to be applied to a plant is not limited, but various types usually used in the art such as water, fertilizer, soil, medium or culture solution. Materials can be mentioned. A plant in the growing stage as described above, a material for application to the plant, or a soil, medium or culture medium from which the plant grows, an agent for reducing the amount of water irrigation of the plant according to each aspect of the present invention, agricultural chemistry. By applying the preparation or pesticide, the irrigation amount and / or the water absorption amount of the plant can be reduced without substantially causing an unfavorable effect on the growth of the plant.

Agriculturally effective amounts of acetic acid or salts thereof, or solvants thereof, in particular the plant irrigation reducing agents, agricultural chemicals or pesticides of each aspect of the invention, are used before and / or after reducing the irrigation of the plant. Or, in the meantime, it can be applied to the plant itself, a material for application to the plant, or from there to the soil, medium or culture solution in which the plant grows. While reducing the irrigation amount of the plant, an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof, particularly an agent for reducing the irrigation amount of the plant according to each aspect of the present invention, an agricultural chemical preparation or a pesticide is applied. Is preferable. Plant growth by applying an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof, particularly an agent for reducing the irrigation amount of the plant according to each aspect of the present invention, an agricultural chemical preparation or a pesticide at the above time period. It is possible to reduce the amount of irrigation and / or the amount of water absorption of the plant without substantially causing an unfavorable effect on the plant.

In one embodiment, the method of this embodiment is, optionally, in addition to an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof, a plant, a material for applying the further agent to the plant. Alternatively, it may further include application to the soil, medium or culture medium in which the plant grows. As the further agent, it is preferable that the agent is an additional agent of the agricultural chemical composition described above. In this case, an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof, and an additional drug are applied to the plant, a material for applying the plant, or a soil, a medium or a medium on which the plant grows. The order of application to the culture medium is not particularly limited. For example, an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof and an additional drug simultaneously (as a single or separate formulation) of a plant, a material for application to the plant, or from there. It may be applied to the soil, medium or culture medium in which the plant grows, or it may be applied sequentially. By applying an additional agent to a plant or the like in addition to an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof, the plant can be grown without substantially causing an unfavorable effect on the growth of the plant. The amount of irrigation and / or the amount of water absorption can be reduced.

The dosage form of the irrigation reducing agent for plants, the preservative for cut flowers, the agricultural chemical preparation or the pesticide in each aspect of the present invention is not particularly limited. It can be formulated into a dosage form such as an emulsion, a wettable powder, a liquid, a water solvent, a powder, a powder, a paste or a granule, which is usually used in the art. In each aspect of the present invention, acetic acid or a salt thereof, or a solvate thereof is contained or applied in an agriculturally effective amount. In each aspect of the present invention, an agriculturally effective amount of acetic acid or a salt thereof, or a mixture thereof, is, for example, in the range of 0.01 to 0.5% by mass with respect to the total mass at the time of application, and is usually used. It is in the range of 0.05 to 0.5% by mass with respect to the total mass at the time of application, and typically in the range of 0.05 to 0.2% by mass or 0.075 to 0.25% by mass with respect to the total mass at the time of application. More typically, it is in the range of 0.09 to 0.2% by mass with respect to the total mass at the time of application, and in particular, it is in the range of 0.1 to 0.2% by mass with respect to the total mass at the time of application. For example, when the irrigation reducing agent, agricultural chemical preparation or pesticide in each aspect of the present invention is in the form of a liquid, acetic acid or a salt thereof, or an agriculturally effective amount thereof is an agriculturally effective amount. For example, it is in the range of 0.01 to 0.5% by volume with respect to the total volume at the time of application, and is usually in the range of 0.05 to 0.5% by volume with respect to the total volume at the time of application, typically at the time of application. It is in the range of 0.05 to 0.2% by volume or 0.075 to 0.25% by volume with respect to the total volume of the above, and more typically in the range of 0.09 to 0.2% by volume with respect to the total mass at the time of application. In particular, it is in the range of 0.1 to 0.2% by volume with respect to the total mass at the time of application.

In the cultivation of plants, the conditions for applying the irrigation reducing agent, agricultural chemical preparation or pesticide of each aspect of the plant of the present invention to the plant or the like are appropriately set based on the state of growth of the plant. It is possible to stably control the growth of the plant while reducing the amount of irrigation and / or the amount of water absorption of the plant. Therefore, another aspect of the present invention is to acquire one or more information regarding the growth of a plant (hereinafter, also referred to as "information acquisition step"), and the present invention is based on the acquired one or more information. The plant, the material for applying the agrochemical preparation or the pesticide, preferably the agrochemical composition of one aspect of the present invention to the plant, or the plant from the same. The present invention relates to a method for controlling the growth of the plant, which comprises determining the conditions for application to the growing soil, medium or culture solution (hereinafter, also referred to as “application condition determination step”).

The information to be acquired in the information acquisition process is not limited to one or more, but is not limited to, for example, extension of foliage or root, increase in number of leaves, promotion of flowering or fruiting, flower or fruit. Various information on growth-promoting effects such as increased numbers, increased plant weight or crop yield, promotion of greening, or foliage, as well as incapacity (death), poor growth (eg, whole or part of the plant). Unfavorable effects on plant growth such as whitening or yellowing of leaves (eg leaves or flowers), decreased root length or decreased number of leaves, or lodging), decreased growth rate, or decreased plant weight or crop yield. Various information about can be mentioned. By acquiring one or more pieces of information exemplified above, the state of growth of a plant can be evaluated.

The conditions for applying the irrigation reducing agent, agricultural chemical preparation or pesticide of each aspect of the present invention, preferably the agricultural chemical composition of one aspect of the present invention, which are determined in the application condition determination step, are the same. It is appropriately set so that the irrigation amount and / or the water absorption amount of the plant can be reduced by carrying out the application. The conditions determined in this step are, for example, the composition, pH, and application rate of the irrigation reducing agent, agricultural chemical preparation or pesticide of each aspect of the present invention, preferably the agricultural chemical composition of one aspect of the present invention. It can be selected from one or more conditions selected from the group consisting of the application time and the content of acetic acid or a salt thereof contained as an active ingredient, or a solvent thereof. Specific values of these conditions can be appropriately set from the range exemplified in the present specification. Amount of water irrigation of a plant by determining appropriate conditions for applying an agent for reducing the amount of water irrigation of a plant according to each aspect of the present invention, an agricultural chemical preparation or a pesticide, preferably an agricultural chemical composition according to one aspect of the present invention. And / or while reducing the amount of water absorption, the growth of the plant can be stably controlled.

In the method for controlling the growth of plants in this embodiment, the number and order of the information acquisition step and the application condition determination step are not particularly limited. For example, the information acquisition step and the application condition determination step may be carried out once in this order, or the information acquisition step, the application condition determination step, and then the further information acquisition step may be carried out in this order, the first time. The combination of the information acquisition process and the application condition determination process may be repeated a plurality of times, such as the information acquisition process, the first application condition determination process, the second information acquisition process, and the second application condition determination process. ..

By implementing the method for controlling the growth of the plant of this embodiment, the agent for reducing the amount of water irrigation of the plant of each aspect of the present invention, the agricultural chemical preparation or the pesticide is applied to the plant or the like based on the state of growth of the plant. By appropriately setting the conditions, the growth of the plant can be stably controlled while reducing the amount of irrigation and / or the amount of water absorption of the plant.

As described in detail herein, according to the present invention, an agent for reducing the irrigation amount of a plant containing acetic acid or a salt thereof, which can be obtained at a low cost, or a solvate thereof as an active ingredient, a preservative for cut flowers, agriculture. Chemical formulations or pesticides can be provided. Therefore, by applying the irrigation reducing agent, agricultural chemical agent or pesticide of each aspect of the present invention to the plant, it is safe and low cost, and substantially without causing an unfavorable effect on the growth of the plant. , The amount of irrigation and / or the amount of water absorption of the plant can be reduced. In addition, by applying the preservatives, agricultural chemicals or pesticides of the cut flowers of each aspect of the present invention to the cut flowers, the cut flowers can be safely and inexpensively produced without substantially causing an unfavorable effect on the growth of the cut flowers. The amount of irrigation and / or the amount of water absorption can be reduced, and as a result, the cut flowers can be preserved while maintaining freshness.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the technical scope of the present invention is not limited to these examples.

<I: Reduction test of irrigation amount for cut flowers (1)>
Commercially available cut flowers of spray chrysanthemum (variety: spray mum, plants shipped at the same time by the same producer) were prepared. Cut flowers of 4 strains were grown indoors in 500 mL of the test solution under room temperature conditions for 5 days. The volume of the test solution after growth was measured. The test solution is water (control group), 0.1% by volume acetic acid aqueous solution (0.1% by volume acetic acid treatment group, acetic acid: water = 1: 1000, pH unadjusted) or 0.2% by volume acetic acid aqueous solution (0.2% by volume acetic acid treatment group). , Acetic acid: water = 1: 500, pH unadjusted). As acetic acid, commercially available glacial acetic acid for food additives (Kosakai Pharmaceutical Co., Ltd., Tokyo) was used, and as water, tap water was used.

Figure 1 shows the appearance and water absorption of cut flowers in the control group, 0.1% by volume acetic acid treatment group and 0.2% by volume acetic acid treatment group. In the figure, (a) is a photograph showing the overall appearance of cut flowers at the start of the test, (b) is a photograph showing the overall appearance of cut flowers after 5 days of growth, and (c) is a photograph showing the overall appearance of cut flowers. It is a photograph which shows the appearance of the cut part of the stem of a cut flower and the test solution after growing for 5 days. As shown in FIGS. 1 (a) and 1 (b), no significant difference in plant growth was observed between the control group and the 0.1% by volume acetic acid-treated group. On the other hand, in the case of the 0.2% by volume acetic acid-treated group, a remarkable difference in the growth of the plant body such as yellowing of leaves was observed as compared with the control group. The volume of the test solution after 5 days of growth was about 50 mL for the control group. In contrast, the volume of the test solution after 5 days of growth was about 120 mL or about 150 mL, respectively, in the 0.1% by volume acetic acid treatment group and the 0.2% by volume acetic acid treatment group (Fig. 1 (c), White arrow). That is, the water absorption of cut flowers was about 450 mL in the control group, whereas it was about 380 mL or about 350 mL in the 0.1% by volume acetic acid treatment group and the 0.2% by volume acetic acid treatment group, respectively (controls, respectively). It was about 84% or about 78%) with respect to the ward.

From the results of this test, it was shown that the water absorption of plants can be reduced by applying acetic acid. In particular, it was shown that the application of a 0.1% by volume acetic acid aqueous solution can reduce the water absorption of the plant without substantially causing an unfavorable effect on the growth of the plant.

<II: Test to reduce the amount of irrigation for cut flowers (2)>
Commercially available cut flowers of gerbera (variety: sanglow, plants shipped by the same producer at the same time) were prepared. Cut flowers of 4 strains were grown indoors in 8 mL of the test solution under room temperature conditions for 2 days. The remaining test solution was then discarded and replaced with 500 μL of fresh test solution. Cut flowers were grown indoors under room temperature conditions for an additional 5 days (7 days total), changing test solutions daily as described above. The test solution is water (control group), 0.1% by volume acetic acid aqueous solution (0.1% by volume acetic acid treatment group, acetic acid: water = 1: 1000, pH unadjusted) or 0.2% by volume acetic acid aqueous solution (0.2% by volume acetic acid treatment group). , Acetic acid: water = 1: 500, pH unadjusted). As acetic acid and water, the same ones as in I above were used.

Figure 2 shows the appearance of cut flowers in the control group, the 0.1% by volume acetic acid treatment group, and the 0.2% by volume acetic acid treatment group. In the figure, (a) is a photograph showing the overall appearance of cut flowers at the start of the test, and (b) is a photograph showing the overall appearance of cut flowers after 7 days of growth. As shown in FIGS. 2 (a) and 2 (b), flower lodging (broken neck) was observed in 75% or more of the plants in the control group and the 0.1% by volume acetic acid-treated group. In addition, brown discoloration was observed in the flowers that did not fall down as compared with the plants at the start of the test. On the other hand, in the case of the 0.2% by volume acetic acid-treated group, about 100% of the plants grew well, and no flower lodging or discoloration was observed.

The results of this test showed that the application of acetic acid can reduce the amount of irrigation of plants with virtually no adverse effects on plant growth.

<III: Reduction test of irrigation amount for cut flowers (3)>
Commercially available cut flowers of spray chrysanthemum (variety: spray mum, plants shipped at the same time by the same producer) were prepared. Cut flowers of 4 strains were grown indoors in 500 mL of the test solution under room temperature conditions for 5 days. The volume of the test solution after growth was measured. The test solution is water (control group), 0.1% by volume acetic acid aqueous solution (0.1% by volume acetic acid treatment group, acetic acid: water = 1: 1000, pH 6-7) or 0.2% by volume acetic acid aqueous solution (0.2% by volume acetic acid treatment group). , Acetic acid: water = 1: 500, pH 6-7). The pH of the acetic acid aqueous solution was adjusted using a KOH aqueous solution and pH test paper. As acetic acid and water, the same ones as in I above were used.

Figure 3 shows the appearance of cut flowers in the control group, 0.1% by volume acetic acid-treated group and 0.2% by volume acetic acid-treated group after growing for 5 days. As shown in FIG. 3, in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group, all the plants grew well, and no flower lodging or discoloration was observed. In particular, in the case of the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group, the stem portion was elongated as compared with the control group. Further, similar to the test result of I, in the case of the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group, a decrease in water absorption was observed as compared with the control group.

From the results of this test, it is shown that the application of an aqueous acetic acid solution having a pH of 6 to 7 can reduce the amount of water absorption of a plant while promoting the growth of the plant without substantially causing an unfavorable effect on the growth of the plant. Was done.

<IV: Test to reduce the amount of irrigation for cherry tomato seedlings>
Nine strains of commercially available cherry tomato seedlings (variety: minicarol) were prepared. The seedlings were transplanted one by one into a plastic pot containing about 200 mL of soil. The pot seedlings were placed in an open rack installed outdoors to avoid rain. A sufficient amount of water was applied to the soil of all pot seedlings, and the plants were left in an open rack overnight in an outdoor environment. Then, 100 mL of water was applied to the soil of all pot seedlings, and the mixture was left for 1 hour until the excess water did not flow out from the bottom of the pot. Six strains of well-grown pot seedlings were selected and used in two strains each in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group. 30 mL of the test solution was applied to the soil of the pot seedlings. The test solution is water (control group), 0.1% by volume acetic acid aqueous solution (0.1% by volume acetic acid treatment group, acetic acid: water = 1: 1000, pH unadjusted) or 0.2% by volume acetic acid aqueous solution (0.2% by volume acetic acid treatment group). , Acetic acid: water = 1: 500, pH unadjusted). The pot seedlings in the control group and the acetic acid-treated group were grown in an outdoor environment for 4 weeks while being placed in an open rack. A 30 mL test solution was applied weekly during the growing season.

Figures 4 and 5 show the appearance of pot seedlings in the control group, 0.1% by volume acetic acid-treated group and 0.2% by volume acetic acid-treated group after growing for 4 weeks. In FIG. 5, (a) is a photograph showing the overall appearance of pot seedlings in the control group, the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group, and (b) is a photograph showing the overall appearance of the pot seedlings in the 0.2% by volume acetic acid-treated group. It is a photograph which shows the fruit (mini tomato) formed in the pot seedling. As shown in FIG. 4, in the control group, the 0.1% by volume acetic acid treatment group and the 0.2% by volume acetic acid treatment group, all the plants grew well, and the lodging or discoloration of the main stem or the side branch was hardly observed. rice field. In particular, in the case of the 0.1% by volume acetic acid-treated group and the 0.2% by volume acetic acid-treated group, the main stem portion was elongated and the whole seedling was greatly grown as compared with the control group. Furthermore, fruiting was observed only in the 0.2% by volume acetic acid treatment group (Fig. 5 (b)). Although the results are not shown, in the case of pot seedlings grown under normal conditions immediately after transplantation, the main stem part was more elongated than the pot seedlings in the 0.2% by volume acetic acid treatment group, and the whole seedlings were grown. Although they grew larger, no flowering or fruiting was observed.

From the results of this test, it was shown that the application of acetic acid can reduce the amount of irrigation of the plant while promoting the growth of the plant without substantially causing an unfavorable effect on the growth of the plant.

<V: Test to reduce the amount of irrigation in tomato field cultivation>
We purchased commercially available tomato seedlings (variety: Home Momotaro) that were sown and shipped at the same time. The seedlings were transplanted one by one into a plastic pot containing about 200 mL of soil to obtain pot seedlings.

A wooden frame was installed in the greenhouse field. Vinyl films were attached to the bottom and sides of the wooden frame to prevent moisture from penetrating from the ground surface to the inside of the wooden frame. Inside this crate, sufficiently dried commercially available black soil (basic soil containing no fertilizer, etc.) was placed to a depth of 30 cm. The black soil inside the crate was used as test cultivated land.

Four pot seedlings per test plot were allowed to stand overnight in a vat containing 1 L of water (pretreatment of seedlings). By pretreatment of seedlings, a sufficient amount of water was absorbed into the soil from the bottom of the pot to make the water content of the soil of each pot seedling uniform. The pretreated pot seedlings were directly transplanted to the test cultivated land.

On days 7, 14 and 21 after transplantation, 100 mL of water per individual was applied to the untreated group, and 100 mL of 10 mM (0.057% by volume, pH unadjusted) acetic acid aqueous solution was applied to the acetic acid-applied group. The plot applied 400 mL of water per individual. As acetic acid, commercially available glacial acetic acid for food additives (Kosakai Pharmaceutical Co., Ltd., Tokyo) was used, and as water, tap water was used. The application dose from transplantation to the 21st day was 300 mL per individual in the untreated group and the acetic acid application group, and 1200 mL per individual in the control group. That is, all of the tomato plants in the untreated plot, the acetic acid-applied plot and the control plot were cultivated under the non-dry stress condition of continuous irrigation.

On the 22nd day after transplanting, the growth state of each tomato plant was visually confirmed. The test of the above procedure was repeated 3 times. The percentage of surviving individuals to the total population of the untreated plot, control plot and acetic acid-applied plot was calculated as the survival rate (%). The viability of tomato plants in the untreated plot, the control plot and the acetic acid-applied plot is shown in FIG. In the figure, the survival rate value is the average value of the three-time repeated test. In addition, the appearance of tomato plants in the untreated group, the control group and the acetic acid-applied group during the test period is shown in FIG. In the figure, (a) is a photograph of tomato plants in each plot at the time of transplantation, (b) is a photograph of tomato plants in each plot on the 15th day after transplantation, and (c) is a photograph of 22 from transplantation. It is a photograph of the tomato plant in each ward on the day.

As shown in FIG. 6, the average survival rate of the untreated plot was about 5% on the 22nd day after transplantation. In contrast, the average survival rates of the control group and the acetic acid application group were about 85% and 90%, respectively. In addition, it was observed that some of the tomato plants in the untreated plot died on the 15th day after transplanting, and completely died on the 22nd day after transplanting (Fig. 7 (b)). And (c)). On the other hand, the tomato plant in the acetic acid-applied plot did not die and was substantially the same as the tomato plant in the control plot, even if the amount of irrigation was the same as when the tomato plant in the untreated plot died. It showed equivalent growth. From the comparison of the irrigation amount of the acetic acid application group (300 mL per individual) and the irrigation amount of the control group (1200 mL per individual), the irrigation amount of the acetic acid application group can be reduced to 25% as compared with the control group. Was confirmed.

From the results of this test, it was shown that the application of acetic acid can reduce the amount of water absorption of the plant while promoting the growth of the plant without substantially causing an unfavorable effect on the growth of the plant such as death. ..

All publications, patents and patent applications cited herein are incorporated herein by reference in their entirety.

Claims (11)

A plant irrigation reducing agent containing acetic acid or a salt thereof, or a solvate thereof as an active ingredient. The irrigation reducing agent for a plant according to claim 1, further containing at least one solvent containing water and having a pH in the range of 4-8. The invention according to claim 1 or 2, further containing at least one or more solvents containing water, and containing acetic acid or a salt thereof in the range of 0.01 to 0.5% by volume based on the total volume, or a solvate thereof. A solvent for reducing the amount of irrigation of plants. An agricultural chemical composition for reducing the amount of irrigation of a plant, which comprises acetic acid or a salt thereof, or a solvate thereof, and one or more agriculturally acceptable components. The agricultural chemical composition according to claim 4, further comprising one or more solvents including at least water and having a pH in the range of 4-8. 4. Agricultural chemical composition. Includes applying an agriculturally effective amount of acetic acid or a salt thereof, or a solvate thereof, to a plant, a material for application to the plant, or from there to the soil, medium or culture medium in which the plant grows. , A method for reducing the amount of irrigation of the plant. Obtaining one or more pieces of information about the growth of a plant,
Based on the acquired information, the agent for reducing the irrigation amount of the plant according to any one of claims 1 to 3 or the agricultural chemical composition according to any one of claims 4 to 6 can be used. Determining the conditions under which the plant, the material to be applied to the plant, or the soil, medium or culture medium in which the plant grows is applied.
A method for controlling the growth of the plant, including. A preservative for cut flowers containing acetic acid or a salt thereof, or a solvate thereof as an active ingredient. The preservative for cut flowers according to claim 9, further comprising one or more solvents including at least water and having a pH in the range of 4-8. 9. Preservative for cut flowers.

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