A method for inhibiting water evaporation and application of anti-evaporation agent

Abstract

The present invention relates to the field of agricultural chemistry, and in particular to a method for inhibiting water evaporation and the use of an anti-evaporation agent. By applying the sulfite compound, the water evaporation rate is significantly reduced, and the method can be adapted for application methods such as foliar spraying and drip irrigation. The method is simple to operate, environmentally friendly, and cost-effective, and is suitable for water conservation and precision pesticide application in arid regions.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural chemistry, and in particular to a method for inhibiting water evaporation and application of an anti-evaporation agent. Background Art

[0002] Global agriculture is facing the dual challenges of increasingly severe water shortages and climate change. According to the Food and Agriculture Organization of the United Nations, agriculture accounts for 70% of global freshwater consumption, while traditional irrigation systems experience evaporation losses of up to 50%-70%, exacerbating regional water crises. In the context of climate change, frequent extreme heat waves and droughts further threaten crop water balance and yield stability. Improving water use efficiency through technological innovation has become a core issue for ensuring food security and sustainable agricultural development.

[0003] In an attempt to inhibit water evaporation, the use of anti-evaporation aids has been reported.

[0004] Anti-evaporation adjuvants, a class of substances that reduce the rate of water evaporation through physical or chemical mechanisms, have garnered widespread attention in recent years. Their mechanisms of action include, but are not limited to, forming a hydrophobic film on soil and leaf surfaces, regulating plant stomatal behavior, or enhancing root water absorption capacity. Improving the anti-evaporation properties of droplets can also prevent rapid evaporation of liquid medicine deposited on leaf surfaces. This can lead to complete evaporation of the active ingredient before it is fully absorbed by the leaves or target, hindering its absorption and utilization, and thus its efficacy. Existing research indicates that anti-evaporation adjuvants can reduce soil evaporation by 30%-60%, significantly extending irrigation intervals, and demonstrating significant water-saving and yield-increasing effects, particularly in arid and semi-arid regions.

[0005] However, different anti-evaporation adjuvants also have corresponding limitations. Currently, anti-evaporation adjuvants mainly include four categories: vegetable oils, mineral oils, silicones, and surfactants. Their performance bottlenecks and environmental risks have become key obstacles to the precise and efficient use of pesticides. Vegetable oil adjuvants are easily oxidized and decomposed by light and are highly sensitive to the environment. They easily separate from the pesticide solution under drought conditions and may cause crop damage. Mineral oil adjuvants have high viscosity, which increases droplet size and affects penetration. They are also difficult to biodegrade and can easily cause soil pollution. Although silicone adjuvants can significantly reduce surface tension, their high volatility causes rapid droplet shrinkage, and excessively small droplets can easily cause drift risks. Surfactant adjuvants have problems with biological toxicity and strong soil adsorption, and some synthetic ingredients are also ecologically hazardous.

[0006] The carbamate-based inhibitor developed by Wu Yan's team has an evaporation inhibition rate of 30-40% in an environment above 30°C, but its high temperature tolerance and efficiency still need to be improved (Wu Yan, Fang Xiting, Yang Fangming. Preparation and performance of carbamate-based water evaporation inhibitors [J]. Journal of Tianjin University of Science and Technology, 2014, 29(03): 34-39). Ma Yan et al. used octadecyl alcohol and n-propanol to compound and found that the increased surface tension led to a decrease in the spreading rate and a short effective duration (Ma Yan, Ye Hanchun, Lv Xifeng, et al. Comparative experimental study of homogeneous / heterogeneous water evaporation inhibitors [J]. People's Yellow River, 2015, 37( 6)); Patent (CN106417262A) discloses a chitosan-based sol-gel system, the evaporation inhibition rate of which is significantly attenuated in a high temperature environment above 36°C, and the thermal stability is insufficient; Patent (CN101235267B) forms a heterogeneous W / O emulsion by compounding a long-chain fatty alcohol (such as hexadecanol) with a short-chain alcohol (such as n-butanol), which spreads on the water surface to form a molecular film to inhibit evaporation, and the inhibition effect is good, but the oil phase solvent is petroleum ether, and long-term use may cause potential pollution to the water ecosystem. AEO emulsifiers have poor biodegradability and may accumulate in water, threatening the safety of aquatic organisms.

[0007] Therefore, it is particularly important to continuously discover or provide new products that are safer and have good water evaporation inhibition effects.

[0008] Sulfite compounds are currently used to kill agricultural mites. For example, CN 118373760A discloses several structurally improved sulfite compounds that exhibit superior acaricidal efficacy compared to propargyl. However, there are currently no reports of these compounds being used to inhibit water evaporation. Summary of the Invention

[0009] The present invention is the first to discover the effect of sulfite compounds in inhibiting water evaporation, which expands the application range of sulfite compounds and also provides a new choice for anti-evaporation agents in agriculture.

[0010] The present invention provides a method for inhibiting water evaporation, wherein a sulfite compound is applied to water. The structural formula of the sulfite compound is as follows:

[0011]

[0012] Wherein, R1 and R2 are selected from halogen;

[0013] R3, R3', R4, and R4' are independently selected from hydrogen, C1-C5 alkyl, and C1-C5 alkenyl;

[0014] R5 is selected from halogen.

[0015] In some specific embodiments of the present invention, R1 and R2 are selected from Cl; R5 is selected from F.

[0016] In some specific embodiments of the present invention, R3 and R3' are selected from hydrogen; R4 and R4' are independently selected from hydrogen, -CH3, -CH2CH3, and -CH=CH2.

[0017] In some specific embodiments of the present invention, the sulfite compound is selected from one or a combination of two or more of the following:

[0018]

[0019] In some specific embodiments of the present invention, the sulfite compound is selected from one or a combination of two or more of the following:

[0020]

[0021] In the present invention, the sulfite compound exhibits a significant effect of inhibiting water evaporation in a wide temperature range (20° C.-50° C.), and is particularly suitable for high-temperature and arid environments.

[0022] In the present invention, when the sulfite compound or its product is prepared into a solution for use in inhibiting water evaporation, the concentration of the sulfite compound in the solution can be selected according to actual needs.

[0023] In some specific embodiments of the present invention, the administration concentration of the sulfite compound is not less than 0.001% (w / w).

[0024] In other specific embodiments of the present invention, the sulfite compound is administered at a concentration of 0.001%-50% (w / w).

[0025] In some specific embodiments of the present invention, a surfactant and / or a solvent is further included during administration.

[0026] In some specific embodiments of the present invention, when applied, the mass ratio of the sulfite compound to the surfactant is 1:0.1-20, the concentration of the surfactant is not less than 0.001% (w / w); the balance is the solvent.

[0027] In some embodiments of the present invention, the surfactant is selected from the group consisting of: ethoxylated castor oil, sodium lauryl sulfate, saponin, ethoxylated alcohols, ethoxylated fatty esters, alkoxylated glycols, ethoxylated fatty acids, carboxylated alcohols, carboxylic acids, fatty acids, ethoxylated alkylphenols, fatty esters, sodium lauryl sulfide, and Tween, or a combination of two or more thereof;

[0028] The solvent is selected from one or a combination of two or more of water, ethanol, isopropanol, benzyl alcohol, acetone, acetophenone, water, glycerol, castor oil, ethoxylated alcohols, ethoxylated amides, glycerides, butanol, 1-propanol, hexanol, other alcohols, dimethyl ether, and polyethylene glycol.

[0029] In some specific embodiments of the present invention, the sulfite compound is made into an agricultural product for use, and the agricultural product further comprises one or more of an auxiliary dispersant, a wetting agent, a binder, an emulsifier, a stabilizer, and a solvent.

[0030] In the present invention, dosage forms include but are not limited to emulsifiable concentrates, aqueous solutions, aqueous emulsions, soluble solutions, microemulsions, suspensions, oil suspensions, microcapsule suspensions, mother solutions, and the like.

[0031] In some specific embodiments of the present invention, the agricultural product made from the sulfite compound is used in combination with foliar fertilizer, water-soluble fertilizer, compound fertilizer, pesticide, plant regulator, biostimulant, and soil conditioner.

[0032] In some specific embodiments of the present invention, when used, the sulfite compound or the agricultural product prepared therefrom is used to treat seeds, spray on leaves, or irrigate roots; preferably, the sulfite compound is sprayed on leaves.

[0033] The present invention also provides a composition for inhibiting water evaporation, comprising the above-mentioned sulfite compound.

[0034] In some specific embodiments of the present invention, the composition further comprises an agriculturally acceptable carrier or adjuvant.

[0035] In some specific embodiments of the present invention, the carrier is water or an organic solvent; the auxiliary agent includes a dispersant, a wetting agent, a binder, an emulsifier, and a stabilizer.

[0036] The present invention also provides an anti-evaporation agent, the active ingredient of which comprises a sulfite compound, and the structural formula of the sulfite compound is as follows:

[0037]

[0038] Wherein, R1 and R2 are selected from halogen;

[0039] R3, R3', R4, and R4' are independently selected from hydrogen, C1-C5 alkyl, and C1-C5 alkenyl;

[0040] R5 is selected from halogen.

[0041] In some specific embodiments of the present invention, R1 and R2 are selected from Cl; R5 is selected from F.

[0042] In some specific embodiments of the present invention, R3 and R3' are selected from hydrogen; R4 and R4' are independently selected from hydrogen, -CH3, -CH2CH3, and -CH=CH2.

[0043] In some specific embodiments of the present invention, the sulfite compound is selected from one or a combination of two or more of the following:

[0044]

[0045] In some specific embodiments of the present invention, the sulfite compound is selected from one or a combination of two or more of the following:

[0046]

[0047] Beneficial effects:

[0048] (1) Highly efficient water evaporation inhibition performance: The droplet evaporation rate dropped from 48.70% of the blank group to 24.06% within 30 minutes at 30°C, with an inhibition efficiency exceeding 50%; the inhibition effect remained stable under high temperature (40°C) conditions (the evaporation rate dropped from 67.78% to 33.02%).

[0049] (2) Environmental friendliness and synergistic effects: The composition does not contain heavy metals and difficult-to-degrade components, and has no risk of pesticide damage to plants; after being compounded with surfactants, the droplet spreading area increases by 25%-30%, and the pesticide utilization rate increases by 10%-15%, achieving both water-saving and precise application effects.

[0050] (3) Economical and flexible operation: The synthesis process is simple (three-step reaction, yield ≥70%), and the raw material cost is low; it is suitable for various application methods such as foliar spraying and drip irrigation, and is suitable for complex agricultural environments such as drought and high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 The inhibitory effect of different compounds on droplet evaporation (hanging drop method);

[0052] Figure 2 The inhibitory effect of different compounds on droplet evaporation (sessile drop method);

[0053] Figure 3 is the inhibitory effect of compound 1 at different concentrations on droplet evaporation;

[0054] Figure 4 is the fitting curve graph. DETAILED DESCRIPTION

[0055] The following is a clear and complete description of the technical solution of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0056] The term "inhibiting water evaporation" as used in the present invention refers to reducing water loss due to evaporation.

[0057] The "C1-C5 alkyl" mentioned in the present invention refers to a straight or branched saturated hydrocarbon alkyl group, including at least -CH3, -CH2CH3, -CH2CH2CH3, -CH2(CH3)2, -CH2CH2CH2CH3, -C(CH3)3, -CH2C(CH3)3, -CH2CH2CH2CH2CH3, etc.

[0058] The "C1-C5 alkenyl" mentioned in the present invention includes at least -CH=CH2, -CH2-CH=CH2, -CH2CH2-CH=CH2, --CH2CH2CH2-CH=CH2, etc.

[0059] The "halogen" mentioned in the present invention is selected from F, Cl, Br, and I.

[0060] The intermediate compounds of the present invention can be prepared by a variety of synthetic methods well known to those skilled in the art, including the specific embodiments listed herein, embodiments formed by combining them with other chemical synthesis methods, and equivalent substitutions well known to those skilled in the art. Preferred embodiments include but are not limited to the examples of the present invention.

[0061] The chemical reactions of the present invention are carried out in suitable solvents that are compatible with the chemical transformations of the present invention and the reagents and materials required. To obtain the compounds of the present invention, it may sometimes be necessary for those skilled in the art to modify or select synthetic steps or reaction schemes based on existing embodiments.

[0062] In the present invention, the concentration of the sulfite compound is not less than 0.001% (w / w), for example, it can be selected from: 0.001%, 0.004%, 0.005%, 0.01%, 0.05%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc.

[0063] In some embodiments of the present invention, the concentration of the sulfite compound administered may be selected from 0.001% to 50% (w / w).

[0064] In other embodiments of the present invention, the administration concentration of the sulfite compound can be selected from 0.001% to 10% (w / w).

[0065] In other embodiments of the present invention, the administration concentration of the sulfite compound can be selected from 0.001% to 5% (w / w).

[0066] In other embodiments of the present invention, the administration concentration of the sulfite compound can be selected from 0.001% to 1% (w / w).

[0067] In other embodiments of the present invention, the administration concentration of the sulfite compound can be selected from 0.001% to 0.5% (w / w).

[0068] In other embodiments of the present invention, the administration concentration of the sulfite compound can be selected from 0.001% to 0.1% (w / w).

[0069] In other embodiments of the present invention, the administration concentration of the sulfite compound can be selected from 0.001% to 0.05% (w / w).

[0070] In the present invention, "w / w" refers to weight by weight, i.e., the percentage of solute mass to the total mass of the solution. For example, 0.05% (w / w) means that every 100 grams of solution contains 0.05 grams of the target compound, with the remainder being solvent or additives.

[0071] Suitable surfactant can be selected by those skilled in the art according to actual use requirements.The example of the surfactant that can be used in some embodiments of the present invention includes but is not limited to, ethoxylated castor oil, sodium lauryl sulfate, saponin, ethoxylated alcohol, ethoxylated fatty ester, alkoxylated glycol, ethoxylated fatty acid, carboxylated alcohol, carboxylic acid, fatty acid, ethoxylated alkylphenol, fatty ester, sodium lauryl sulfide, Tween, other surfactants based on fatty acid, other natural or synthetic surfactants and its combination. In some embodiments, the surfactant is a nonionic surfactant. In some embodiments, the surfactant is an ionic surfactant. The selection of suitable surfactant depends on relevant application and conditions of use, and suitable surfactant is well known to those skilled in the art.

[0072] In some embodiments of the present invention, the surfactant is selected from Tween, and commonly used Tween types include but are not limited to Tween-20, Tween-60, and Tween-80.

[0073] In some embodiments of the present invention, when applied, the mass ratio of the sulfite compound to the surfactant is 1:0.1 to 20, for example, 1:0.1, 1:0.5, 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20.

[0074] In some embodiments of the present invention, when applied, the concentration of the surfactant is not less than 0.001% (w / w), for example, it can be selected from: 0.001%, 0.004%, 0.005%, 0.01%, 0.05%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%. 7%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, etc.

[0075] In some embodiments of the present invention, when applied, the concentration of the surfactant may be selected from 0.001% to 50% (w / w).

[0076] In some embodiments of the present invention, when applied, the concentration of the surfactant may be selected from 0.001% to 10% (w / w).

[0077] In other embodiments of the present invention, when applied, the concentration of the surfactant may be selected from 0.001% to 5% (w / w).

[0078] In other embodiments of the present invention, when applied, the concentration of the surfactant may be selected from 0.001% to 1% (w / w).

[0079] In other embodiments of the present invention, when applied, the concentration of the surfactant may be selected from 0.001% to 0.5% (w / w).

[0080] In other embodiments of the present invention, when applied, the concentration of the surfactant may be selected from 0.001% to 0.1% (w / w).

[0081] In some embodiments of the present invention, when administered, the proportion of the solvent is greater than 1% (w / w), for example, it can be selected from: 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99%, 99.9%, 99.99%, etc.

[0082] In some other embodiments of the present invention, the solvent may account for 50 to 99.99% (w / w) during administration.

[0083] Dispersants are chemical additives that promote the uniform dispersion of solid particles in a liquid or matrix by reducing interparticle interactions. In agricultural formulations, dispersants are commonly used in suspension concentrates (SCs) and granules (GRs). For example, in aqueous suspension concentrates, dispersants (such as sodium lignin sulfonate or polycarboxylates) can stably disperse ultrafine particles (<4 microns) of the solid active ingredient in water, preventing particle aggregation or sinking, thereby ensuring uniform distribution of the liquid during spraying. In granules, dispersants help evenly mix the active ingredient with the carrier (such as clay), preventing stratification during the granulation process and ensuring the consistency of the active ingredient within the granules.

[0084] Wetting agents are surfactants that reduce liquid surface tension, enhancing the wetting and penetration of pesticide solutions onto solid surfaces. Their core function is to promote the rapid dispersion of hydrophobic powders or particles in water, improve the evenness of the pesticide spread on leaves, and prevent droplet bounce. For example, in wettable powders (WP), sodium dodecyl sulfate (SDS) rapidly wets imidacloprid powder to form a suspension. During foliar spraying, the natural wetting agent saponin improves the pesticide's adhesion to waxy leaves and reduces runoff.

[0085] Binders are additives that physically or chemically enhance the mechanical strength of granules or powders, preventing breakage and dust generation. In granules (GR), binders (such as polyvinyl alcohol, sodium carboxymethyl cellulose, or starch) bind the active ingredient to a carrier (such as diatomaceous earth), forming a strong granular structure. For example, the addition of polyvinyl alcohol as a binder to herbicide granules significantly increases granule hardness, reduces dusting during handling, and ensures slow granule disintegration in the field, extending the duration of the drug's effectiveness.

[0086] Emulsifiers are surfactants that reduce interfacial tension between the oil and water phases, promoting mixing and forming a stable emulsion. In emulsifiable concentrates (ECs), emulsifiers (such as Tween-80, AEO-9, or alkylphenol polyoxyethylene ethers) dissolve high concentrations of the active ingredient in an organic solvent (such as xylene) and mix with water to form a uniform emulsion. For example, the addition of Tween-80 to chlorpyrifos EC forms a stable emulsion upon dilution, preventing oil-water separation and ensuring uniform coverage of the crop surface. Emulsifiers are also used in microemulsions (MEs), achieving nanoscale dispersion by reducing interfacial tension.

[0087] Stabilizers are a class of functional additives used to maintain the chemical stability (e.g., resistance to decomposition) and physical stability (e.g., prevention of precipitation and stratification) of formulations. In suspension concentrates (SCs), stabilizers (e.g., xanthan gum, magnesium aluminum silicate, or bentonite) can prevent solid particles from settling or agglomerating, thereby extending shelf life. For example, the addition of xanthan gum to fungicide suspensions can significantly improve the stability of the suspension and prevent stratification during storage. In granules, stabilizers (e.g., the antioxidant BHT or the light stabilizer UV-326) can prevent oxidation or photolysis of the active ingredient in the granules, ensuring long-lasting efficacy. For example, insecticide granules containing BHT can maintain the activity of the active ingredient even in high-temperature environments.

[0088] Emulsifiable concentrates are a type of agricultural formulation. They are formed by dissolving a high concentration of the active ingredient in a solvent and adding an emulsifier. They are typically diluted with a large amount of water to form a stable emulsion and then applied using a sprayer. Low-volume and even ultra-low-volume sprays are also possible. They can be used directly or diluted with water before spraying.

[0089] Aqueous solution is a solution of the original drug. The drug is evenly dispersed in water in the form of ions or molecules. The concentration of the drug depends on the water solubility of the original drug, which is generally its maximum solubility. It is then diluted with water when used.

[0090] An emulsion in water (EW) is a liquid technical preparation made by mixing a liquid or solvent, uniformly dispersed in water as droplets of 0.5-1.5 microns, resulting in a milky white, milky appearance. It consists of active ingredients, emulsifiers, dispersants, and antifreeze agents. The active ingredients are typically required to have a water solubility below 1000 mg / L. Emulsifiers reduce surface and interfacial tension, dispersing the oil phase into tiny droplets that remain stable in the aqueous phase. Dispersants, combined with thickeners, enhance low-temperature and freeze-thaw stability, while antifreeze agents improve the formulation's low-temperature stability.

[0091] Soluble concentrates are a type of pesticide formulation. They are made by dissolving the active ingredient in a suitable solvent to form a uniform, transparent liquid. The active ingredient in this formulation is typically highly soluble in water or has a high solubility in specific solvents.

[0092] A microemulsion is a thermodynamically stable, isotropic, transparent or translucent liquid dosage form. It is a colloidal dispersion system with a particle size between 0.01 and 0.1 microns formed under appropriate conditions by combining the active ingredient, surfactant, co-surfactant, and water. Microemulsions are highly stable and are less susceptible to stratification and precipitation during storage. Their transparent or translucent appearance, similar to that of microemulsions, allows them to be more evenly dispersed in water during use, forming a stable emulsion that facilitates accurate metering and dilution.

[0093] A suspension concentrate (SC) is a formulation in which a solid technical drug is uniformly dispersed in water as particles smaller than 4 microns. Its international designation is SC. It has a fine particle size, typically 0.1 to 3 μm, and a high suspension rate. Suspension concentrates are categorized as water-based suspension concentrates and oil-based suspension concentrates. Water-based suspension concentrates use water as the suspending medium, while oil-based suspension concentrates use oils as the suspending medium and do not contain water. Commonly used oils are vegetable oils, such as corn oil and rapeseed oil. Suspension concentrates eliminate the need for organic solvents and are an ideal dosage form for processing solid technical drugs. A suspension concentrate is a mixture of solid powder and liquid suspended in water. It must be shaken well before use, then diluted with water before spraying. Suspension concentrates are easy to carry and dilute, can be sprayed evenly, and have good adhesion and long-lasting effectiveness.

[0094] An oil suspension concentrate (OSC) is a formulation in which a water-insoluble pesticide technical is uniformly dispersed in an oily medium as tiny particles. It primarily consists of the technical, an oil carrier, a dispersant, an emulsifier, and a thickener. The oil carrier, typically a vegetable or mineral oil, provides a dispersion medium for the technical. Dispersants and emulsifiers uniformly disperse and stabilize the technical particles in the oily medium, preventing particle aggregation and sedimentation. Thickeners adjust the viscosity of the formulation, ensuring good flowability and stability.

[0095] A microcapsule suspension concentrate (MSS) is a dosage form in which the active ingredient is encapsulated within a tiny capsule wall, forming microcapsules of a specific particle size and suspended in an aqueous phase. It consists of multiple ingredients, including the active ingredient, capsule wall material, emulsifier, dispersant, solvent, and water. MSS offers numerous advantages. First, it effectively prolongs the drug's duration of action. Through the slow release effect of the capsule wall, the drug's efficacy is sustained over a longer period. Second, it reduces drug toxicity and irritation. Since the active ingredient is encapsulated within the capsule, direct contact with the external environment and organisms is reduced, making it safer for humans, animals, and beneficial organisms.

[0096] A mother liquor is a concentrated system formed by premixing the active ingredient with solvents, additives, and other ingredients in specific proportions. Depending on the ingredients, it can appear as a clear solution, suspension, or viscous paste. For example, an emulsifiable concentrate mother liquor often consists of the active ingredient (such as a pyrethroid), a solvent (xylene), and an emulsifier (such as an alkylphenol polyoxyethylene ether). It is diluted with water in proportion to form a spray solution.

[0097] In the present invention, sulfite compounds can be used in combination with foliar fertilizers, water-soluble fertilizers, compound fertilizers, pesticides, plant regulators, biostimulants, soil conditioners, and adapted to foliar spraying, seed treatment, root irrigation and other application methods to achieve all-round efficiency improvement in agricultural production: (1) Synergistic mechanism of combined use: When compounded with foliar fertilizers or pesticides, the compounds extend the residence time of droplets by inhibiting evaporation, thereby improving the absorption efficiency of nutrients or active ingredients. For example, spraying tomatoes with humic acid foliar fertilizer can enhance fruit quality; when combined with water-soluble fertilizer for drip irrigation, it forms a water-retention barrier on the soil surface, optimizes the slow-release performance of nitrogen fertilizer, and reduces irrigation needs; used in conjunction with pesticides, it improves the control effect in high-temperature environments by delaying the drying of droplets, while reducing the frequency of application and the risk of residues; (2) Multi-path application effects: Foliar spraying (preferred): forms a uniform molecular film, reduces water evaporation and transpiration stress, such as protecting crops from burns in high-temperature and arid areas; seed treatment: film-forming properties promote germination and root development, such as wheat seeds after soaking. The drought resistance and resistance to soil-borne diseases are significantly enhanced; root irrigation application: builds a soil water retention layer and prolongs the water and fertilizer effectiveness cycle, such as promoting healthy root growth in corn field applications, etc.

[0098] The term "application" as used in the present invention refers to the technical act of adding specific substances (such as fertilizers, pesticides, amendments, etc.) to the soil, plants or environment through artificial or mechanical means to achieve the purpose of improving crop growth conditions, preventing and controlling pests and diseases, regulating soil properties or optimizing agricultural production.

[0099] "Foliar fertilizer," as used in this context, refers to fertilizers applied to plant leaves by spraying, absorbed directly by the leaves, and participating in plant metabolism. These fertilizers bypass the soil and directly reach the plant, providing rapid nutrient replenishment. They are particularly useful when root absorption is limited or when nutrient deficiencies require prompt correction. Examples of such fertilizers include water-soluble solutions containing amino acids and trace elements.

[0100] The "water-soluble fertilizer" described in this invention is a multi-element compound fertilizer that is completely soluble in water. It typically contains macronutrients such as nitrogen, phosphorus, and potassium, as well as trace elements (such as calcium, magnesium, and iron), with some organic components such as amino acids and humic acid added. It is suitable for integrated water-fertilizer technologies such as sprinkler and drip irrigation, and features rapid effectiveness, flexible formulation, and high utilization rates.

[0101] The term "compound fertilizer" as used herein refers to a mixed fertilizer containing at least two of the three nutrients: nitrogen, phosphorus, and potassium. This fertilizer, with a fixed nutrient ratio, is suitable for basic soil fertilization, complementing foliar fertilizers or water-soluble fertilizers. For example, potassium dihydrogen phosphate (containing phosphorus and potassium) falls into this category.

[0102] "Pesticides," as used in this context, are chemical or biological agents used to prevent, eliminate, or control agricultural and forestry pests and diseases, and to regulate plant growth. These include insecticides, fungicides, herbicides, and plant growth regulators. It's important to note the difference between pesticides and foliar fertilizers: pesticides primarily control pests, while foliar fertilizers primarily provide nutritional supplements. However, the two can be mixed for improved effectiveness.

[0103] "Plant regulators," as used herein, are active substances that influence plant development by regulating physiological processes (such as growth, flowering, and fruiting). These include natural hormones (such as auxins and gibberellins) and synthetic analogs. These should be distinguished from fertilizers, as their function focuses on physiological regulation rather than nutrient supply. For example, chitosan, as a biostimulant, can enhance plant stress resistance.

[0104] The "biostimulant" mentioned in the present invention is a substance or microorganism that improves plant growth by promoting nutrient absorption, enhancing resistance to abiotic stress (such as drought and salinity), or improving quality.

[0105] The "soil conditioner" mentioned in the present invention is a material used to improve the physical, chemical or biological properties of the soil, such as adjusting the pH value, increasing organic matter or promoting the activity of beneficial microorganisms. Its core function is to optimize the soil environment rather than directly provide nutrients.

[0106] As used in this application, "include" or "comprising" are to be interpreted in their open-ended sense, i.e., specifying the presence of stated features, elements, steps or components, but not excluding the presence or addition of further features, elements, steps or components.

[0107] In the present invention, the "solvent" used can be selected from water, ketones, alcohols, aldehydes, ethers, esters or carboxylic acids, and can include non-aryl ketones, non-aryl alcohols, non-aryl aldehydes, non-aryl esters, non-aryl carboxylic acids, aryl alcohols, aryl-alkyl alcohols, aryl aldehydes, aryl-alkyl ketones, aryl-aryl ketones, aryl carboxylic acids, aryl-alkyl esters, aryl-aryl esters, aryl-alkyl ethers, aryl-aryl ethers and / or combinations thereof.

[0108] In some embodiments, the "organic solvent" can be selected from hydrocarbons, halogenated hydrocarbons, oxygen-containing solvents, natural source solvents, special functional solvents and their composite systems, such as: n-hexane, toluene, dichloromethane, ethanol, acetone, ethyl acetate, castor oil, turpentine, etc.

[0109] In some embodiments, the solvent includes water, ethanol, isopropanol, benzyl alcohol, acetone, acetophenone, water, glycerol, castor oil, ethoxylated alcohols, ethoxylated amides, glycerides, butanol, 1-propanol, hexanol, other alcohols, dimethyl ether, polyethylene glycol, etc.

[0110] Example 1: Synthesis of sulfite compounds

[0111] (1) Synthesis of Compound 1

[0112]

[0113] Step 1:

[0114]

[0115] 2,4-Dichlorophenol (1 g, 6.2 mmol) was added to a reaction flask and dissolved in 20 mL of DMF. Propylene oxide (722 mg, 7.6 mmol) and cesium carbonate (8 g, 24.8 mmol) were added, and the mixture was heated in an oil bath at 100°C for reaction. After 6 h, the reaction was complete as monitored by TLC. 100 mL of water was added, and the mixture was extracted with ethyl acetate (30 mL x 3). The organic phase was washed with saturated brine, collected, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. Compound iii-1 (989 mg, colorless, transparent liquid) was obtained by separation and purification.

[0116] Step 2:

[0117]

[0118] Add thionyl chloride (803 mg, 6.8 mmol) to a reaction flask, dissolve it in 20 mL of dichloromethane, move to 0°C in an ice bath, and slowly add compound iii-1 (989 mg, 4.5 mmol) dropwise. After the addition is complete, move to room temperature and react for 10 h. After completion of the reaction as monitored by TLC, concentrate the reaction solution under reduced pressure to obtain a pale yellow oil, which is the crude product of compound v-1, which is ready for use.

[0119] Step 3:

[0120]

[0121] Compound vi-1 (346 mg, 5.4 mmol) was added to a reaction flask, followed by triethylamine (683 mg, 6.8 mmol). The mixture was stirred in an ice bath at 0°C, and compound v-1 (1269 mg, 4.5 mmol) was slowly added dropwise. After the addition was complete, the mixture was allowed to react at room temperature for 6 h. After completion of the reaction as monitored by TLC, 100 mL of water was added to the reaction solution, which was then extracted with dichloromethane (30 mL × 3). The organic phase was washed with saturated brine, collected, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. Purification by column chromatography afforded compound 1 (902 mg, homogeneous liquid).

[0122] 1 H NMR(400MHz, CDCl3)δ7.39(d,J=2.5Hz,1H),7.20(dd,J=8.8,2.5Hz,1H),6.85(d,J=8.8Hz,1H),5.01-4.93(m,1H),4.74–4.66(m,1H),4.63 –4.55(m,1H),4.40-4.31(m,1H),4.31-4.22(m,1H),4.10(dd,J=10.0,6.3Hz,1H),4.02(dd,J=10.0,4.3Hz,1H),1.52(d,J=6.5Hz,3H)ppm.

[0123] HRMS(ESI)Calcd.For C 11 H 14 Cl2FO4SNa + [M+Na] + 352.9768; Found:352.9786,354.9758.

[0124] (2) Synthesis of Compound 2

[0125]

[0126] Referring to the synthesis method of compound 1, the propylene oxide in step 1 is replaced with ethylene carbonate, and compound 2 is synthesized through steps 2 and 3.

[0127] 1H NMR (400MHz, CDCl3) δ7.31 (d, J=2.5Hz, 1H), 7.12 (dd, J=8.8, 2.5Hz, 1H), 6.78 (d, J=8.8 Hz,1H),4.65–4.62(m,1H),4.53–4.49(m,1H),4.34–4.30(m,2H),4.25–4.18(m,3H)ppm.

[0128] HRMS(ESI)Calcd.For C 10 H 11 O4Cl2FS + [M+H] + 316.9739; Found:316.09658.

[0129] (3) Synthesis of Compound 3

[0130]

[0131] Referring to the synthesis method of compound 1, the propylene oxide in step 1 is replaced with 1,2-butylene oxide, and compound 3 is synthesized through steps 2 and 3.

[0132] 1 H NMR (400MHz, CDCl3) δ7.32–7.29(m,1H),7.14–7.09(m,1H),6.85–6.81(m,1H),4.75–3.96(m,7H),1.86-1.66(m,2H),0.98(t,J=6.7Hz,3H)ppm.

[0133] HRMS(ESI)Calcd.For C 12 H 15 O4Cl2FS + [M+H] + 344.0052; Found:344.0026.

[0134] (4) Synthesis of Compound 4

[0135]

[0136] Referring to the synthesis method of compound 1, the propylene oxide in step 1 is replaced with epoxybutene, and compound 4 is synthesized through steps 2 and 3.

[0137] 1H NMR (400MHz, CDCl3) δ7.31(dd,J=2.6,1.4Hz,1H),7.11(dd,J=8.8,2.5Hz,1H),6.77(dd,J=8.8,1.2Hz,1H),5.95–5.87(m,1H),5.48(d, J=17.2,Hz,1H),5.39-5.33(m,1H),5.17-5.10(m,1H),4.65-4.56(m,1H),4.54-4.45(m,1H),4.40-4.12(m,2H),4.06-3.97(m,2H)ppm.

[0138] (5) Synthesis of Compound 5

[0139]

[0140] Referring to the synthesis method of compound 1, the propylene oxide in step 1 was replaced with methylpropylene oxide, and compound 5 was synthesized through steps 2 and 3.

[0141] 1 H NMR (400MHz, CDCl3) δ7.31(d,J=2.5Hz,1H),7.11(dd,J=8.8,2.6Hz,1H),6.75(d,J=8.8Hz,1H),4.61–4.57( m,1H),4.49–4.45(m,1H),4.30–2.34(m,1H),4.21–4.18(m,1H),3.92(s,2H),1.58(s,3H),1.57(s,3H)ppm.

[0142] HRMS(ESI)Calcd.For C 12 H 16 Cl2FO4S + [M+H] + 345.0125; Found: 345.0143. Test Example 1: Testing the droplet evaporation inhibition rate using the hanging drop method

[0143] 1. Sample preparation:

[0144] CK (blank group): 50% (w / w) Tween 80, 50% (w / w) deionized water. Mix equal amounts of deionized water and Tween 80 to form a homogeneous liquid, which forms the blank group test solution for later use.

[0145] Methylated soybean oil: 50% (w / w) Tween 80, 50% (w / w) methylated soybean oil. Mix equal amounts of methylated soybean oil and Tween 80 to form a homogeneous liquid, which is used as the test solution.

[0146] Compound 1: 50% (w / w) tween 80, 50% (w / w) compound 1. Mix equal amounts of compound 1 and tween 80 to form a homogeneous liquid, which is used as the test solution.

[0147] Compound 2: 50% (w / w) tween 80, 50% (w / w) compound 2. Mix equal amounts of compound 2 and tween 80 to form a homogeneous liquid, which is used as the test solution.

[0148] Compound 3: 50% (w / w) tween 80, 50% (w / w) compound 3. Mix equal amounts of compound 3 and tween 80 to form a homogeneous liquid, which is used as the test solution.

[0149] Compound 4: 50% (w / w) tween 80, 50% (w / w) compound 4. Mix equal amounts of compound 4 and tween 80 to form a homogeneous liquid, which is used as the test solution.

[0150] Compound 5: 50% (w / w) tween 80, 50% (w / w) compound 5. Mix equal amounts of compound 5 and tween 80 to form a homogeneous liquid, which is used as the test solution.

[0151] 2. Experimental methods

[0152] (1) Weigh 0.1 g ± 0.001 g of the test solution and dilute it 1000 times to 100 g with standard deionized water to form the test sample;

[0153] (2) After drawing the sample to be tested with a microsyringe, fix the microsyringe in the syringe fixing slot of the contact angle measuring instrument and fix it vertically above the temperature control box. The needle of the microsyringe extends into the interior of the temperature control box to avoid the influence of ambient temperature and humidity on the evaporation of the droplets. The temperature of the water bath connected to the temperature control box is 30°C.

[0154] (3) After the instrument stabilizes, the droplet generator on the measuring instrument is controlled by the SCA20 software to generate a single droplet of 15 μL. At this time, the droplet is suspended on the needle of the microsyringe;

[0155] (4) Select video recording, automatically shoot the droplets through the CCD lens of the image acquisition device, and record the entire process of droplet evaporation; use SCA20 software to process the data to obtain the change of droplet volume over time, and calculate the droplet evaporation rate through the formula.

[0156] The droplet evaporation rate and droplet evaporation inhibition rate data in this experiment were both studied with an evaporation time of 30 minutes and a temperature of 30°C.

[0157] Droplet evaporation rate = (initial droplet volume - final droplet volume) / initial droplet volume;

[0158] Evaporation inhibition rate (%) = (W f -W d ) / W f ×100%(W f : water evaporation of the blank group; W d : water evaporation of the test group).

[0159] 3. Results Analysis

[0160] The results showed (Table 1 and Figure 1 ), the addition of compounds 1 and 3 significantly inhibited the evaporation of the droplets. At 30 minutes, the evaporation rate of the blank group reached 48.70%, while that of the compound 1 and 3 groups decreased to 24.06% and 27.79%, respectively, and both showed a linear inhibition trend within 30 minutes (R 2 >0.98), while compounds 2 (37.33%), 4 (38.26%), and 5 (43.00%) also showed some inhibitory effects. Compound 1 had the highest evaporation inhibition rate (50.60%), significantly outperforming methylated soybean oil (49.92%) and other compounds. Compound 3 had the second highest inhibition rate, at 42.94%, surpassing compounds 2 (23.36%), 4 (21.45%), and 5 (11.70%). Its mechanism of action may involve the formation of a dynamic interfacial film through intermolecular interactions, thereby reducing mass transfer efficiency at the liquid-vapor interface. Compound 1 had an inhibition rate similar to that of methylated soybean oil, but compound 1, due to its more stable molecular structure, has advantages in long-term applications.

[0161] Table 1 Evaporation rate and evaporation inhibition rate (%) of different compounds at 30°C for 0-30 min

[0162]

[0163] Test Example 2: Sessile Drop Method to Test Droplet Evaporation Inhibition Rate

[0164] 1. Sample preparation:

[0165] The sample preparation method is the same as that of Experimental Example 1.

[0166] 2. Experimental methods

[0167] (1) Weigh 0.1 g ± 0.001 g of the test solution and dilute it 1000 times to 100 g with standard deionized water to form the test sample;

[0168] (2) In order to better simulate the evaporation of droplets on the leaf surface, a standard paraffin sheet was used to simulate the wax layer on the leaf surface. After the test liquid was sucked with a micro syringe, the micro syringe was fixed in the syringe fixing slot of the contact angle meter. After the instrument was stable, the droplet generator on the measuring instrument was controlled by SCA20 software to generate a single droplet of 10 μL. The droplet was added to the surface of the standard paraffin sheet. The standard paraffin sheet was placed in a temperature control box to avoid the influence of ambient temperature and humidity on the evaporation of the droplet. The temperature of the water bath connected to the temperature control box was 30 °C.

[0169] (3) Select video recording, and automatically shoot the droplets through the CCD lens of the image acquisition device (shooting time interval is 2s), and record the entire process of droplet evaporation; use SCA20 software to process the data to obtain the change of droplet volume over time, and calculate the droplet evaporation rate through the formula.

[0170] The droplet evaporation rate and droplet evaporation inhibition rate data in this experiment were both studied with an evaporation time of 5 minutes and a temperature of 30°C.

[0171] Droplet evaporation rate = (initial droplet volume - final droplet volume) / initial droplet volume.

[0172] Evaporation inhibition rate (%) = (W f -W d ) / W f ×100%(W f : water evaporation of the blank group; W d : water evaporation of the test group).

[0173] 2. Results Analysis

[0174] The experimental results show that ( Figure 2 (See Table 2 for details) Compounds 1 and 2 demonstrated significant evaporation inhibition within 5 minutes. While the control group achieved a 5-minute evaporation rate of 16.09%, Compounds 1 and 2 reduced this to 9.11% and 10.61%, respectively. Kinetic analysis revealed that the inhibitory efficiencies within the 5-minute period were 43.3% and 33.0%, respectively, significantly outperforming the other tested compounds. Furthermore, Compound 1 demonstrated the highest evaporation inhibition rate (43.35%), significantly outperforming methylated soybean oil and other compounds.

[0175] Table 2 Evaporation rate and evaporation inhibition rate (%) of different compounds at 30°C for 0-5 min

[0176]

[0177] Test Example 3: Relationship between compound concentration and anti-evaporation performance

[0178] 1. Sample preparation:

[0179] CK (blank group): 50% (w / w) Tween 80, 50% (w / w) deionized water. Deionized water and Tween 80 were mixed to form a homogeneous liquid, which formed the blank group test solution for later use.

[0180] 4% Compound 1: 50% (w / w) Tween 80, 4% (w / w) Compound 1, 46% (w / w) deionized water. Weigh 0.4 g ± 0.001 g of Compound 1 and mix with 5 g ± 0.001 g of Tween 80 to form a homogeneous liquid. Then add 4.6 g ± 0.001 g of deionized water and mix to form the test solution for later use.

[0181] 10% Compound 1: 50% (w / w) Tween 80, 10% (w / w) Compound 1, 40% (w / w) deionized water. Weigh 1g ± 0.001g of Compound 1 and mix with 5g ± 0.001g of Tween 80 to form a homogeneous liquid. Then, add 4g ± 0.001g of deionized water and mix to form the test solution for later use.

[0182] 50% Compound 1: 50% (w / w) Tween 80, 50% (w / w) Compound 1. Weigh equal amounts of Compound 1 and Tween 80 and mix them evenly to form a homogeneous liquid, which is used as the test solution for later use.

[0183] 2. Experimental methods

[0184] (1) Weigh 0.1 g ± 0.001 g of the test solution and dilute it 1000 times to 100 g with standard deionized water to form the test sample;

[0185] (2) After drawing the sample to be tested with a microsyringe, fix the microsyringe in the syringe fixing slot of the contact angle measuring instrument and fix it vertically above the temperature control box. The needle of the microsyringe extends into the interior of the temperature control box to avoid the influence of ambient temperature and humidity on the evaporation of the droplets. The temperature of the water bath connected to the temperature control box is 40°C.

[0186] (3) After the instrument stabilizes, the droplet generator on the measuring instrument is controlled by the SCA20 software to generate a single droplet of 15 μL. At this time, the droplet is suspended on the needle of the microsyringe;

[0187] (4) Select video recording, automatically shoot the droplets through the CCD lens of the image acquisition device, and record the entire process of droplet evaporation; use SCA20 software to process the data to obtain the change of droplet volume over time, and calculate the droplet evaporation rate through the formula.

[0188] The droplet evaporation rate and droplet evaporation inhibition rate data in this experiment were both studied with an evaporation time of 30 minutes and a temperature of 40°C.

[0189] Droplet evaporation rate = (initial droplet volume - final droplet volume) / initial droplet volume.

[0190] Evaporation inhibition rate (%) = (W f -W d ) / W f ×100%(W f : water evaporation of the blank group; W d : water evaporation of the test group).

[0191] 3. Results Analysis

[0192] In this experimental investigation, it was found that the addition of compound 1 had a very significant effect on improving the anti-evaporation properties of the droplets. In the blank group, after 30 minutes of observation, the evaporation rate of the droplets was as high as 67.78%, which means that more than two-thirds of the droplets evaporated within half an hour, and the water loss was quite serious. When compound 1 was added to the droplet system, the situation was greatly improved. At the same 30-minute node, the evaporation rate of the droplets containing compound 1 was only in the range of 30%-50%; at 30 minutes, its evaporation inhibition rate reached a maximum of 51.30%, demonstrating its excellent anti-evaporation effect, effectively slowing down the rate of water loss in the droplets, and enhancing the stability of the droplets ( Figure 3 and Table 3 ).

[0193] Table 3 Evaporation rate and evaporation inhibition rate of compound 1 at different concentrations at 40°C (%)

[0194]

[0195] The evaporation rate data measured at each time period were further linearly fitted. The trend presented by the fitted curve revealed a very clear pattern: as the amount of compound 1 added gradually increased, the evaporation rate of the droplets showed a significant decrease. This fully demonstrates that there is a close connection between the amount of compound 1 added and the droplet's anti-evaporation ability. The more compound 1 added, the stronger the droplet's anti-evaporation ability ( Figure 4 ).

[0196] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for inhibiting water evaporation, characterized in that: Applying sulfite compounds to the water, The sulfite compound is selected from the following: 。 2. The method according to claim 1, characterized in that The sulfite compound is selected from the following: 、 、 。 3. The method according to claim 1, characterized in that The applied concentration of the sulfite compound is not less than 0.001% (w / w).

4. The method according to claim 3, characterized in that The sulfite compound is applied at a concentration of 0.001%-50% (w / w).

5. The method according to claim 1, wherein When used, a surfactant and / or a solvent are also included.

6. The method according to claim 5, characterized in that When applied, the mass ratio of the sulfite compound to the surfactant is 1:0.1~20, and the concentration of the surfactant is not less than 0.001% (w / w); the balance is the solvent.

7. The method according to claim 5, characterized in that The surfactant is selected from the group consisting of: ethoxylated castor oil, sodium lauryl sulfate, saponin, ethoxylated alcohol, alkoxylated glycol, carboxylated alcohol, carboxylic acid, fatty acid, ethoxylated alkylphenol, fatty ester, sodium lauryl sulfide, Tween, or a combination of two or more thereof; The solvent is selected from one or a combination of two or more of water, ethanol, isopropanol, benzyl alcohol, acetone, acetophenone, glycerol, castor oil, ethoxylated alcohols, ethoxylated amides, glycerides, butanol, 1-propanol, hexanol, dimethyl ether, and polyethylene glycol.

8. The method according to claim 1, characterized in that The sulfite compound is made into an agricultural product for use, and the agricultural product further comprises one or more of an auxiliary material dispersant, a wetting agent, a binder, an emulsifier, a stabilizer, and a solvent.

9. The method according to claim 8, characterized in that The dosage form of the agricultural product is emulsifiable concentrate, aqueous solution, water emulsion, soluble solution, microemulsion, suspension, oil suspension, microcapsule suspension and mother solution.

10. The method according to claim 1, characterized in that The agricultural product made from the sulfite compound is used in combination with compound fertilizer, pesticide, plant regulator, biostimulant and soil conditioner.

11. The method according to claim 1, wherein The agricultural product made from the sulfite compound is used in combination with foliar fertilizer, pesticide, plant regulator, biostimulant and soil conditioner.

12. The method according to claim 1, characterized in that The agricultural product made from the sulfite compound is used in combination with water-soluble fertilizers, pesticides, plant regulators, biostimulants and soil conditioners.

13. The method according to claim 1, wherein When in use, the sulfite compound or the agricultural product prepared therefrom is used to treat seeds, spray on leaves or irrigate roots.

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