Soil-sealing herbicide adjuvant and herbicide containing the same, use method and application

Abstract

The embodiment of the present invention relates to a soil sealing herbicide adjuvant and a herbicide including the same, a method of use and an application thereof, belonging to the field of pesticide adjuvants, and comprising the following raw materials in parts by weight: 1 to 3 parts by weight of a water retainer, 4 to 18 parts by weight of a film former, 0.5 to 3 parts by weight of an antioxidant, 1 to 6 parts by weight of a dispersant, 4 to 30 parts by weight of a penetrant, 5 to 20 parts by weight of an emulsifier, 0.2 to 2 parts by weight of a suspending agent and 20 to 90 parts by weight of a solvent, wherein the weight ratio of the water retainer to the film former is 1:4 to 7; the weight ratio of the dispersant to the penetrant is 1:4 to 8. The adjuvant of the present invention can effectively improve the weed sealing effect of the soil sealing herbicide, prolong the weed sealing time, and reduce the risk of pesticide damage.

Description

Technical Field

[0001] The present invention relates to the technical field of pesticide adjuvants, and in particular to a soil-sealing herbicide adjuvant, a method for preparing the soil-sealing herbicide adjuvant, a soil-sealing herbicide comprising the adjuvant, and methods of using and applications thereof. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] The beginning of chemical weed control in farmland can be traced back to the late 19th century. Chemical weed control can not only save 60-80% of labor and reduce costs by 40-80%, but also has high weed control efficiency and a more thorough weed control effect. Chemical weed control is the use of herbicides for spray weed control, which is divided into soil sealing weed control to kill weed seeds in the soil and post-emergence stem and leaf spray weed control to kill weeds completely or selectively after they emerge from the soil. Among them, post-emergence stem and leaf spray weed control has the advantages of fast effect, simple operation, less impact of environmental factors, and intuitive prevention effect. It is popular among growers, has developed rapidly, and is used in large quantities.

[0004] However, with the widespread use of herbicides, weeds quickly develop resistance, and the amount of post-emergence foliar herbicides used is increasing, but the effect is becoming less and less ideal. The development of new post-emergence foliar herbicides is difficult, time-consuming and labor-intensive, and can no longer keep up with the speed of weed resistance development. With the gradual improvement of the level of understanding of herbicides, people have begun to pay more and more attention to soil-sealed weeding. Soil-sealed weeding is to evenly spray, sprinkle, mix (sand, soil, fertilizer) herbicides on the soil to form a certain thickness of drug layer (drug film). When the young shoots, seedlings and roots of weed seeds are absorbed by contact, they will kill weeds. Soil-sealed weeding can control weed germination, reduce the base number of weed occurrence, and control weeds when they are young, which can reduce the difficulty and cost of weeding. Soil-sealed weeding is widely used in crops such as rice, wheat, rapeseed, soybeans, peanuts, corn, and rapeseed. Common closed herbicides include isopropyl chloramine, acetochlor, pretilachlor, butachlor, trifluralin, atrazine, dimethoate, etc., which can be applied by spraying, sprinkling, and poisoned soil method (mixing with sand, soil, and fertilizer). Under ideal conditions, the duration of soil-sealed weeding can reach 60-90 days, or even longer.

[0005] Gramineae weeds are the main weeds in paddy fields and dry lands. Usually, the germination depth of seeds with large grains is 5 cm, and the germination depth of seeds with small grains is 1 to 2 cm; the germination depth of annual broad-leaved weeds in the soil is 0 to 5 cm. Therefore, the occurrence of weeds in both paddy fields and dry lands has multiple peaks. For example, the first weed peak appears 8 to 12 days after machine transplanting of rice; the second weed peak appears 25 to 30 days after machine transplanting, and the third weed peak appears 55 days after machine transplanting; while the first weed peak of direct-seeded rice appears 5 to 10 days after sowing, the second weed peak appears 20-25 days after sowing, and the third weed peak appears 45 to 50 days after sowing. The total weed output of transplanted rice fields is 2336 plants / m2. 2 The total grass yield of direct-seeded rice fields is 3670 plants / m 2 .

[0006] Soil-sealed weed control is greatly affected by chemical factors, physical factors, soil moisture (water), and biological factors. The effects of field applications are often uneven, and the duration of effectiveness is also different. Chemical factors are mainly the decomposition of herbicides by light, chemical reactions with soil components, penetration, adsorption, etc. Physical factors are mainly the unevenness of the soil (with mechanization and extensive management, this situation has become the norm), in addition, the evaporation of herbicides in the soil (fast evaporation leads to poor efficacy), the influence of rainfall (rainfall leaching causes herbicide aggregation or downward leaching causing drug damage), wind erosion (wind blows away the drug soil layer), etc. Soil moisture (water) affects the distribution of herbicides, adsorption and desorption with soil, plant absorption, etc., and has a great impact on efficacy. Biological factors are mainly the degradation of herbicides by soil microorganisms, etc. It can be seen that the use conditions of soil-sealed herbicides are much higher than those of post-emergence stem and leaf herbicides, and how to use closed herbicides efficiently and reasonably becomes increasingly important.

[0007] Soil sealing weed control, among which the uneven soil, soil moisture, penetration and dispersion of the agent have a particularly large impact on the effect of soil sealing weed control. There are many ways to improve the efficacy of soil sealing herbicides, such as improving the application equipment, improving the herbicide dosage form and processing quality, and mixing herbicides. Usually, when the application method and application scene are fixed, the most effective measure to achieve the "reduction in application and increase in efficiency" of soil sealing herbicides and reduce environmental pollution is to add spray adjuvants. Therefore, there is an urgent need for a composite soil sealing herbicide adjuvant with good water retention, good dispersibility, good film-forming property, strong antioxidant and strong permeability. Summary of the invention

[0008] Purpose of the Invention

[0009] The purpose of the present invention is to provide a soil-sealing herbicide adjuvant with good water retention, good dispersibility, good film-forming property, strong antioxidant and strong permeability, a preparation method of the soil-sealing herbicide adjuvant, a soil-sealing herbicide thereof, and their use methods and applications, which can effectively improve the weed-sealing effect of the soil-sealing herbicide, prolong the weed-sealing time and reduce the risk of pesticide damage.

[0010] Solution

[0011] To achieve the purpose of the present invention, in a first aspect, the present invention provides a soil sealing herbicide adjuvant, comprising the following raw materials in parts by weight: 1 to 3 parts by weight of a water retaining agent, 4 to 18 parts by weight of a film former, 0.5 to 3 parts by weight of an antioxidant, 1 to 6 parts by weight of a dispersant, 4 to 30 parts by weight of a penetrant, 5 to 20 parts by weight of an emulsifier, 0.2 to 2 parts by weight of a suspending agent, and 20 to 90 parts by weight (optionally 30 to 85 parts by weight, optionally 34 to 69 parts by weight, optionally 34.3 to 68.8 parts by weight) of a solvent, wherein:

[0012] The weight ratio of the water retaining agent to the film forming agent is 1:4-7;

[0013] The weight ratio of the dispersant to the penetrant is 1:4-8.

[0014] Generally, there is no specific requirement for the solvent content.

[0015] Optionally, the above parts by weight may refer to parts by weight or mass fractions.

[0016] Furthermore, the soil-sealing herbicide adjuvant comprises the following raw materials in parts by weight: 1.5 to 3 parts by weight of a water retaining agent, 8 to 18 parts by weight of a film-forming agent, 0.8 to 3 parts by weight of an antioxidant, 1 to 6 parts by weight of a dispersant, 4 to 28 parts by weight of a penetrant, 5 to 18 parts by weight of an emulsifier, 0.6 to 2 parts by weight of a suspending agent, and 25 to 90 parts by weight of a solvent.

[0017] Furthermore, the following raw materials are included in parts by weight: 1.8 to 3 parts by weight of a water retaining agent, 8 to 18 parts by weight of a film former, 0.8 to 3 parts by weight of an antioxidant, 1 to 6 parts by weight of a dispersant, 4 to 25 parts by weight of a penetrant, 5 to 18 parts by weight of an emulsifier, 0.6 to 2 parts by weight of a suspending agent, and 30 to 85 parts by weight (optionally 34 to 69 parts by weight, optionally 34.3 to 68.8 parts by weight) of a solvent.

[0018] Furthermore, the following raw materials are included in parts by weight: 2 to 3 parts by weight of a water retaining agent, 12 to 18 parts by weight of a film-forming agent, 1.2 to 3 parts by weight of an antioxidant, 1 to 5 parts by weight of a dispersant, 4 to 25 parts by weight of a penetrant, 5 to 18 parts by weight of an emulsifier, 0.9 to 2 parts by weight of a suspending agent, and 30 to 85 parts by weight (optionally 34 to 69 parts by weight, optionally 34.3 to 68.8 parts by weight) of a solvent.

[0019] Furthermore, the weight ratio of the water retaining agent to the film forming agent is 1:4-6.8, optionally 1:4-6, optionally 1:5.3-6; the weight ratio of the dispersant to the penetrant is 1:4-7.2, optionally 1:5.

[0020] Optionally, the water retaining agent accounts for 1.8-3% by weight of the soil sealing herbicide adjuvant.

[0021] Further, the water-retaining agent is a high molecular weight hyaluronic acid; optionally, the water-retaining agent is selected from one or more hyaluronic acids with a molecular weight of 1800KDa to 2200Kda; optionally, the water-retaining agent is one or more of 1800Kda hyaluronic acid, 2000Kda hyaluronic acid and 2200Kda hyaluronic acid; optionally, in the water-retaining agent, the weight ratio of 1800Kda hyaluronic acid, 2000Kda hyaluronic acid and 2200Kda hyaluronic acid is (0-1.5):(0-2):(0-1), and optionally the weight ratio is (0-1.5):(0.8-2):(0-1); optionally, 2000Kda hyaluronic acid accounts for 30% to 100% of the weight of the water-retaining agent.

[0022] Furthermore, the film-forming agent is a low molecular weight chitosan; optionally, the film-forming agent is selected from one or more chitosans with a molecular weight of 50 to 90Kda; optionally, the film-forming agent is selected from one or more chitosans with a molecular weight of 50Kda to 90Kda; optionally, the film-forming agent is selected from one or more chitosans with a molecular weight of 50Kda, 70Kda and 90Kda; optionally, in the film-forming agent, the weight ratio of 50Kda chitosan, 70Kda chitosan and 90Kda chitosan is (0 to 8): (1 to 12): (0 to 5); optionally, 70Kda chitosan accounts for 18% to 100% of the weight of the film-forming agent.

[0023] Furthermore, the antioxidant is selected from one or more of water-soluble vitamin E and tea polyphenols. Optionally, in the antioxidant, the weight ratio of water-soluble vitamin E and tea polyphenols is (0.2-3):(0-1), and optionally the weight ratio is (0.5-3):(0-1); optionally, in the antioxidant, water-soluble vitamin E accounts for 60% to 100% of the weight of the antioxidant.

[0024] Further, the dispersant is selected from one or two of soybean lecithin and hydrogenated lecithin; optionally, the dispersant comprises soybean lecithin and hydrogenated lecithin in a weight ratio of 1:(0.2-6); optionally, the weight ratio of soybean lecithin and hydrogenated lecithin is 1:(0.6-6).

[0025] Furthermore, the penetrant is selected from one or more of fatty alcohol polyoxyethylene ether, glycerol, polyether modified silicone oil, fatty acid polyoxyethylene ether, and fatty amine polyoxyethylene ether; optionally, in the penetrant, the weight ratio of fatty alcohol polyoxyethylene ether, glycerol, polyether modified silicone oil, fatty acid polyoxyethylene ether, and fatty amine polyoxyethylene ether is (0-22):(0-30):(0-5):(0-4):(0-4), optionally (1-8):(0-14):(0-5):(0-4):(0-4).

[0026] Furthermore, the emulsifier is selected from one or more of Tween series, Nongru 500# series, 600# series, 400# series and Span series.

[0027] Furthermore, the suspending agent is selected from one or more of xanthan gum, sorbitol, gum arabic, sodium alginate, agar, and methylcellulose.

[0028] Furthermore, the solvent is selected from one or more of deionized water and ethanol; optionally, in the solvent, the weight ratio of deionized water to ethanol is (4.8-58):(0-45), optionally (27.6-58):(0-37.7), optionally, water accounts for 9% to 100% of the weight of the solvent, optionally 42% to 100%.

[0029] Optionally, the formulation of the soil-sealed herbicide adjuvant is a suspoemulsion.

[0030] In a second aspect, a method for preparing the soil-sealing herbicide adjuvant described in the first aspect is provided, characterized in that it includes: mixing and dispersing a water-retaining agent, a film-forming agent, an antioxidant, a dispersant, a penetrant, an emulsifier, a suspending agent and a solvent, performing microfluidization emulsification, and then adding a suspending agent to obtain the soil-sealing herbicide adjuvant.

[0031] Furthermore, the microfluidization emulsification method is: under a pressure of 40 MPa, heating to 45-55° C. and performing microfluidization emulsification twice; optionally, the microfluidization emulsification is performed in a microfluidizer high-pressure homogenization emulsifier.

[0032] In a third aspect, a soil-sealing herbicide is provided, which includes an active ingredient of a herbicidal pesticide and the soil-sealing herbicide adjuvant described in the first aspect or the soil-sealing herbicide adjuvant prepared by the preparation method described in the second aspect.

[0033] Furthermore, the active ingredient of the herbicidal pesticide is selected from one or more of S-isopropylamine, acetochlor, pretilachlor, butachlor, benzylsulfuron-methyl, pyrazosulfuron-methyl, pendimethalin, clomazone, and atrazine.

[0034] In a fourth aspect, the present invention provides a method for using the soil-sealing herbicide adjuvant described in the first aspect, or the soil-sealing herbicide adjuvant prepared by the preparation method described in the second aspect, or the soil-sealing herbicide described in the third aspect, wherein the soil-sealing herbicide adjuvant or herbicide is diluted with water to form a spray liquid and then applied to the soil in the form of a spray, or mixed with sand, fertilizer or soil.

[0035] Furthermore, the soil-sealing herbicide adjuvant and the herbicide spraying liquid are divided into a spraying liquid (ultra-low volume spraying liquid) in which the soil-sealing herbicide adjuvant accounts for 1% to 1.5% of the weight of the spraying liquid, or a spraying liquid (conventional spraying liquid) in which the soil-sealing herbicide adjuvant is diluted 700 to 1200 times according to different spraying methods.

[0036] Furthermore, the mixing ratio of the soil-sealed herbicide adjuvant to sand or fertilizer or soil is 1:400-600.

[0037] During the use of the soil-sealing herbicide of the present invention, the auxiliary agent is mixed with the soil-sealing herbicide and water to prepare a spray liquid, which is used for soil-sealing weeding by spraying method (conventional spraying, ultra-low volume spraying). Or it is used for spreading by poisoned soil method (mixing with sand, fertilizer, and soil). The soil-sealing herbicide auxiliary agent has a synergistic effect on most soil-sealing herbicides. Preferably, the soil-sealing herbicide is one or more of S-isopropylamine, acetochlor, pretilachlor, butachlor, benzylsulfuron-methyl, pyrazosulfuron-methyl, pendimethalin, clomazone, and atrazine.

[0038] Furthermore, in the conventional spraying process, the dilution ratio is 700 to 1200 times, preferably 750 to 1000 times, and most preferably 750 to 800 times. First, add 2 / 3 of water to the dispensing container, add the soil sealing herbicide adjuvant of the present invention according to the dilution ratio, then add the pesticide, add water to make up to 100%, mix evenly, and finally pour into the medicine box and spray within 24 hours.

[0039] Furthermore, during the ultra-low volume spraying (aerial spraying), first add 2 / 3 of water into the preparation container, add the soil-sealed herbicide adjuvant of the present invention at 1-1.5% of the total volume of the spraying liquid, then add the pesticide, add water to make up to 100%, mix evenly, and finally pour into the medicine box and spray within 24 hours.

[0040] Furthermore, the poisoned soil method (mixing with sand, fertilizer, or soil) is used for spreading. The soil-sealed herbicide adjuvant of the present invention is mixed with sand, fertilizer, or soil at a ratio of 1:400-600 (preferably 1:500) in a dispensing container, and then the pesticide is added. After being fully mixed, the application is completed within 24 hours.

[0041] In a fifth aspect, the present invention provides a use of the soil-sealing herbicide adjuvant described in the first aspect, or the soil-sealing herbicide adjuvant prepared by the preparation method described in the second aspect in the preparation of a soil sealer, wherein the soil sealer is a soil-sealing herbicide.

[0042] Beneficial Effects

[0043] (1) The present invention comprehensively considers the application scenario of soil-sealed herbicides, and is composed of a mixture of water-retaining agents, film-forming agents, antioxidants, dispersants, penetrants, emulsifiers, suspending agents, and solvents in specific proportions. By accurately mixing the proportions between the components, mutual synergy is achieved. After the adjuvant of the present invention is barrel-mixed with the soil-sealed herbicide, lecithin can combine with the liquid medicine to form a microvesicle structure. When the agent is sprayed into the soil, under the action of the penetrant, the agent is brought deep into the soil. During the penetration process, the water-retaining agent continues to absorb water and swell, thereby adsorbing with the soil at a depth of 1.5 to 2 cm, and finally forms a tight medicine-soil layer under the action of the film-forming agent, which can effectively improve the grass-sealing effect of the soil-sealed herbicide, prolong the grass-sealing time, and reduce the risk of drug damage.

[0044] (2) The water-retaining agent used in the present invention is hyaluronic acid with a relatively large molecular weight. A pure hyaluronic acid aqueous solution of 1.8-3% (preferably 2%) can firmly retain 98% of the water, playing the role of water retention and anti-evaporation; the film-forming agent - chitosan is the second largest natural polymer and a recyclable renewable resource. Chitosan has excellent film-forming properties, and the relative molecular weight has a more prominent effect on the film-forming properties and the properties of the film. The lower the molecular weight, the lower the tensile strength of the film and the stronger the permeability. The antioxidant vitamin E (Vitamin E) is an excellent antioxidant that can delay the decomposition of the agent in the soil and increase the duration of the agent; the dispersant lecithin has balanced hydrophilic and lipophilic bipolar properties. When the droplets are sprayed into the soil, the hydrophilic group of lecithin combines with the water molecules in the soil, and the lipophilic group of lecithin combines with the lipophilic molecules of the pesticide, thereby facilitating the dispersion of the liquid medicine and enhancing the adsorption of the liquid medicine by the soil.

[0045] (3) The present invention systematically solves various problems encountered by soil-sealing herbicides in application scenarios through scientific mixing and synergistic effects of the various components in the formula, thereby improving the efficacy of soil-sealing herbicides, extending the weed-sealing time, and reducing the risk of pesticide damage; it is highly safe for soil and crop seeds and seedlings, can be decomposed by soil organisms, and is beneficial to environmental protection; there are few reports in domestic and foreign literature that the efficacy of soil-sealing herbicides can be improved by adjuvants.

[0046] (4) The present invention comprehensively considers the application scenario of soil-sealed herbicides, and is composed of a mixture of water-retaining agents, film-forming agents, antioxidants, dispersants and penetrants, emulsifiers, suspending agents, and solvents in a specific ratio. The ratios between the components are precisely mixed, rather than simply superimposed on technology or functions, to achieve mutual synergy. High molecular weight hyaluronic acid has a good water-locking and moisturizing function, which solves the problem of soil moisture (water content) in the application scenario of soil-sealed herbicides and the problem of evaporation of soil-sealed herbicides in the soil; low molecular weight chitosan has good film-forming properties, but low tensile strength, so it will not affect seed germination and emergence; soybean lecithin has good mildness and a unique amphiphilic structure, which can assist the better adsorption of the liquid medicine and the soil; water-soluble vitamin E is an excellent antioxidant, which can delay the decomposition of the medicine in the soil and increase the duration of the medicine; combined with a penetrant, the liquid medicine can penetrate as deep into the soil layer as possible to avoid wind erosion (the wind blows away the medicine soil layer), while achieving deep soil sealing weeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] One or more embodiments are exemplarily described by the pictures in the accompanying drawings, and these exemplary descriptions do not constitute limitations on the embodiments. The special word "exemplary" here means "used as an example, embodiment or illustrative". Any embodiment described as "exemplary" here is not necessarily interpreted as being superior or better than other embodiments.

[0048] Figure 1 In the efficacy test of the soil-sealed herbicide for direct seeding of rice in Application Example 2 of the present invention, whether the pesticide with the soil-sealed herbicide adjuvant of Example 7 of the present invention is added to the weed-sealing effect, wherein A is the weed-sealing effect of the pesticide with the soil-sealed herbicide adjuvant of Example 7 of the present invention added for 15 days, and B is the weed-sealing effect of the pesticide without the soil-sealed herbicide adjuvant added for 15 days.

[0049] Figure 2 In the efficacy test of the soil-sealed herbicide for direct seeding of rice in Application Example 2 of the present invention, the pesticide with the soil-sealed herbicide adjuvant of Example 7 of the present invention added had 45-day and 60-day weed-sealing effects, wherein C was the 45-day weed-sealing effect of the pesticide with the soil-sealed herbicide adjuvant of Example 7 of the present invention added, and D was the 60-day weed-sealing effect of the pesticide with the soil-sealed herbicide adjuvant of Example 7 of the present invention added. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise expressly stated, throughout the specification and claims, the term "including" or its variations such as "comprising" or "including" will be understood to include the stated elements or components, without excluding other elements or other components.

[0051] In addition, in order to better illustrate the present invention, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present invention can also be implemented without certain specific details. In some embodiments, raw materials, elements, methods, means, etc. well known to those skilled in the art are not described in detail, so as to highlight the main purpose of the present invention.

[0052] In the following examples, the preparation method of the soil-sealed herbicide adjuvant is as follows:

[0053] The water retaining agent, film former, antioxidant, dispersant, penetrant, emulsifier, suspending agent and solvent are mixed and mechanically dispersed, placed in a micro jet high pressure homogenizing emulsifier under a pressure of 40 MPa, heated to 45-55° C. and micro jet emulsified twice, and then the suspending agent is slowly added, and the temperature is reduced to obtain the soil sealing herbicide adjuvant.

[0054] The raw materials in the present invention are all commercially available products.

[0055] Example 1

[0056] The raw material compositions and weight proportions of the soil-sealing herbicide adjuvants described in Examples 1 to 7 are shown in Table 1 below.

[0057] Table 1 Raw material composition of soil sealing herbicide adjuvants of Examples 1 to 7, unit: g

[0058]

[0059]

[0060] Comparative Example 1

[0061] The difference from Example 5 is that 2000Kda hyaluronic acid is replaced by an equal amount of acrylic acid (2 g), and the other conditions are the same.

[0062] Comparative Example 2

[0063] The difference from Example 7 is that the water-retaining agent 2000Kda hyaluronic acid is replaced by an equal amount of acrylamide (2g), and the other conditions are the same.

[0064] Comparative Example 3

[0065] The difference from Example 7 is that the film-forming agent 70Kda chitosan is replaced by an equal amount of acrylic resin modified casein film-forming agent (12 g), and the other conditions are the same.

[0066] Comparative Example 4

[0067] The difference from Example 7 is that the antioxidant water-soluble vitamin E and tea polyphenols are replaced by an equal amount of sodium ascorbate (2.5 g), and the other conditions are the same.

[0068] Comparative Example 5

[0069] The difference from Example 7 is that the dispersants soybean lecithin and hydrogenated lecithin are omitted and replaced with an equal amount of deionized water, and the other conditions are the same.

[0070] Comparative Example 6

[0071] The difference from Example 5 is that the weight ratio of the dispersant to the penetrant is 5:1, that is, the dispersant is 7.5g of soybean lecithin and 7.5g of hydrogenated lecithin, and the penetrant is 1g of fatty alcohol polyoxyethylene ether, 0.8g of glycerol, 0.6g of polyether modified silicone oil, 0.2g of fatty amine polyoxyethylene ether and 0.4g of fatty acid polyoxyethylene ether, and the other conditions are the same.

[0072] Comparative Example 7

[0073] The difference from Example 7 is that the penetrant is omitted and replaced with an equal amount of deionized water, and the other conditions are the same.

[0074] Comparative Example 8

[0075] The difference from Example 7 is that the amount of the water retaining agent 2000Kda hyaluronic acid is 12g, and the amount of the film forming agent 70Kda chitosan is 2g, that is, the weight ratio of the water retaining agent to the film forming agent is 6:1, and the other conditions are the same.

[0076] Comparative Example 9

[0077] The difference from Example 5 is that the preparation method is different, specifically:

[0078] Step 1: At room temperature, mix 2000Kda hyaluronic acid as a water retaining agent and 70Kda chitosan as a film forming agent and stir evenly;

[0079] Step 2: Add antioxidant, penetrant, emulsifier, and suspending agent to step 1, and continue stirring until the solution is uniform;

[0080] Step 3: Add the solvent to step 2 and stir evenly to obtain the soil sealing herbicide adjuvant product.

[0081] Application Example 1

[0082] (I) Tests on anti-evaporation and penetration-promoting effects:

[0083] Preparation of spraying liquid: To verify the anti-evaporation and penetration-promoting effects of soil-sealed herbicide adjuvants, the soil-sealed herbicide adjuvants of Examples 1 to 9 and the soil-sealed herbicide adjuvants of Comparative Examples 1 to 9 were mixed with soil-sealed herbicides (30% pretilachlor emulsifiable concentrate) and water, and conventional spraying was simulated. All spraying was completed within 24 hours. Among them, the dilution multiple of the soil-sealed herbicide adjuvant in the spraying liquid was 700 to 1200 times, and the dilution multiple of 30% pretilachlor emulsifiable concentrate in the spraying liquid was 150 times. Anti-evaporation and penetration-promoting experiments were carried out. Among them, the dilution conditions of each group are as follows:

[0084] Agent: 30% pretilachlor emulsifiable concentrate (commercially available, produced by Hefei Xingyu Chemical Co., Ltd., registered dosage: 100-150 ml / mu, registered soil spray).

[0085] Adjuvant group: The adjuvants prepared in Examples 1 to 9 and Comparative Examples 1 to 8 were diluted 750 times and 800 times in the spraying liquid, respectively, and the dilution ratio of 30% pretilachlor emulsifiable concentrate in the spraying liquid was 150 times.

[0086] Adjuvant control group: the adjuvant prepared in comparative example 9 was diluted 700 times and 1000 times in the spraying liquid, respectively, and the dilution ratio of 30% pretilachlor emulsifiable concentrate in the spraying liquid was 150 times.

[0087] Blank control group: 30% pretilachlor emulsifiable concentrate, diluted 150 times in the spray solution.

[0088] The above-mentioned different spray liquids were added into the droplet generator respectively, so that the droplet generator produced and released 75μm, 150μm, and 250μm liquid droplets. The droplets were automatically photographed by an image acquisition device to record the entire process of droplet evaporation. The evaporation time was 60s, and the change of droplet volume with time was obtained, and the droplet evaporation inhibition rate was calculated.

[0089] Penetration time (tested using standard round canvas pieces according to HG / T2575).

[0090] The entire test was carried out in a constant temperature and humidity test room. Each test was repeated 3 times, and the average value was taken to calculate the standard value. The results are shown in Table 2:

[0091] Table 2 Evaporation inhibition rate and penetration time of spray solution containing different soil-sealed herbicide adjuvants

[0092]

[0093]

[0094] As can be seen from Table 1, the evaporation inhibition rate of the spraying liquid added to the embodiment is significantly higher than that of the comparative examples 1-2, and the evaporation inhibition effect of the liquid medicine is obvious; the wetting time of the standard canvas sheet by the spraying liquid added with the adjuvant of the embodiments 1-9 is significantly shortened, and the permeability is significantly improved; after adjusting the formula components or proportions of the comparative examples 1-9, except for the comparative examples 1-2, the effect of inhibiting the evaporation of the liquid medicine is equivalent to that of the embodiment. The application of pesticides is greatly affected by natural conditions such as temperature, humidity, light, and soil moisture. In the study, it was found that if one indicator of the adjuvant is prominent, it cannot enhance the effect and may even affect the final effect of the drug. In terms of permeability, except for the comparative examples 1-5 and 9, the penetration time of the other comparative examples is significantly longer than that of the embodiment, and the effect of the permeability performance is also significantly worse than that of the embodiment.

[0095] As can be seen from the above table, the use of the water-retaining agent and film-forming agent combination of the present invention in a weight ratio of 1:4-6 can significantly improve the evaporation inhibition rate of the spray liquid compared with other water-retaining agent and film-forming agent combinations (Comparative Examples 1-2); at the same time, when the dispersant and penetrant of the present invention are used in a ratio of 1:4-5, the permeability can also be significantly increased.

[0096] The application of pesticides is greatly affected by natural conditions such as temperature, humidity, light, and soil moisture. It was found in the study that if one indicator of the adjuvant is prominent, it cannot enhance the efficacy and may even affect the final effect of the drug. For example, in the physical and chemical performance test, the permeability of the omitted dispersant (Comparative Example 5) is better than that of the embodiment due to the lack of mutual influence of the dispersant. However, in actual field applications, it does not actually help to increase the effect of soil-sealed herbicides and may also affect the effect of the pesticide.

[0097] (II) Soil wetting and infiltration experiment:

[0098] Preparation of spraying liquid: After the adjuvants prepared in Examples 1 to 9 and Comparative Examples 1 to 9 are mixed with pesticide (38% atrazine suspension) and water to form a spraying liquid, ultra-low volume spraying (aerial spraying) is simulated and all spraying is completed within 24 hours, wherein the soil-sealing herbicide adjuvant accounts for 1% to 1.5% of the weight of the spraying liquid, and the content of 38% atrazine suspension in the spraying liquid is 10%. After adding the soil-sealing herbicide adjuvant, the wetting and permeability of the liquid to the soil are verified. The dilution of each group is as follows:

[0099] Agent: 38% atrazine suspension (commercially available, produced by Shandong Binnong Technology Co., Ltd., registered dosage: 100-150 ml / mu, registered soil spray).

[0100] Adjuvant group: the adjuvants prepared in Examples 1 to 9 and Comparative Examples 1 to 8 account for 1.0%, 1.2%, and 1.5% of the weight of the spray liquid, and the content of 38% atrazine suspension in the spray liquid is 10%.

[0101] Adjuvant control group: the adjuvant prepared in comparative example 9 accounted for 0.9% and 1.8% of the weight of the spray liquid, and the content of 38% atrazine suspension in the spray liquid was 10%.

[0102] Blank control group: the content of 38% atrazine suspension in the spraying liquid was 10%.

[0103] The filter paper used was a qualitative medium-speed filter paper with a diameter of 50 mm and a thickness of 0.1 mm. 0.05% carmine was added to the spray liquid to conduct soil wetting and penetration experiments without and with additives. 0.2 mL of the test spray liquid was taken with a 1 mL syringe and dripped vertically onto 30 layers of filter paper stacked together. The diameter and depth of the wetting spots were observed and measured. The results are shown in Table 3.

[0104] Table 3 Soil penetration and moisture retention experiments of a series of spray solutions containing different soil-sealing herbicide adjuvants

[0105]

[0106]

[0107] As shown in Table 3, the wetting diameter of the spraying liquid without adjuvants is 14.6 mm, and the penetration depth is 3.8 mm. After adding the adjuvant of the embodiment of the present invention, the wetting diameter of the spraying liquid is reduced, and the penetration depth is significantly increased, mainly because the spraying liquid with adjuvants penetrates into the soil to reduce the wetting diameter, while the spraying liquid without adjuvants is mainly dispersed on the soil surface. Soil-sealed herbicides need to enter the soil layer 1.5 to 2 cm to play a better role. After adding adjuvants, the depth of the herbicide entering the soil layer is significantly increased to avoid staying on the surface of the soil layer, which not only increases the amount of herbicide entering the soil layer, but also avoids the disadvantages of the soil-sealed herbicide efficacy being affected by too short evaporation time and wind erosion.

[0108] As shown in Table 3, the use of the dispersant and penetrant combination of the present invention in a weight ratio of 1:4-5 can significantly increase the penetration depth of the spraying liquid compared with other dispersant and penetrant combinations (Comparative Examples 6-7), so that most of the liquid can penetrate 1.5-2 cm into the soil layer, achieving soil sealing treatment. In Comparative Examples 6-7, as the concentration increases, the wetting diameter expands, but the penetration depth decreases.

[0109] In the physical and chemical performance tests, the penetration performance of the sample without dispersant (Comparative Example 5) is better than that of the embodiment, and the wetting performance of Comparative Examples 6 to 8 is better than that of the embodiment. However, in actual field applications, it does not actually help to increase the effect of soil-sealed herbicides and may even affect the effect of pesticides.

[0110] Application Example 2

[0111] (I) Efficacy test of soil sealing herbicide for direct seeding of rice:

[0112] The experiment was conducted in a rice field on a farm in Jinggang Town, Wangcheng District, Changsha City, Hunan Province. The test field is flat, with uniform fertility and convenient irrigation and drainage. The soil type is clay loam, with a pH of about 6.8 and an organic matter content of about 1.8%. It was sown directly on June 10, 2022, with a sowing rate of 5kg per mu, and the rice seeds were soaked and germinated. 40kg of compound fertilizer was applied as base fertilizer per mu, and 10kg of urea was applied as topdressing, and field management was carried out according to conventional methods. The main types of weeds in the field last year were barnyard grass, lycopodii, duckweed, and sedge, which were distributed relatively evenly, among which barnyard grass was more serious.

[0113] On the third day after sowing (June 13), the pesticide was applied using a DJI MG-1P plant protection drone (with a nozzle of Tejiet XR11001VS, a flow rate of 0.45 L / min at a pressure of 0.3 MPa, and a droplet size range of 130-250 μm) as a spraying device. The soil-sealed herbicide adjuvants prepared in Examples 1-9 and Comparative Examples 1-9 were mixed with pesticides (60% benzylbutachlor dispersible oil suspension) and water, and the mixture was diluted to 1 L to prepare an ultra-low volume spray liquid. The entire amount of the soil-sealed herbicide adjuvant accounted for 1% to 1.5% of the weight of the spray liquid, and the content of the 60% benzylbutachlor dispersible oil suspension in the spray liquid was 6%. The test was conducted in accordance with the "Field Efficacy Test Guidelines" GB / T17980.402000.

[0114] The dilutions of each group are as follows:

[0115] Agent: 60% benzylbutachlor dispersible oil suspension (commercially available, produced by Anhui Yuanjing Crop Protection Co., Ltd., registered dosage: 60-100 ml / mu, registered soil spray).

[0116] Adjuvant group: the adjuvants prepared in Examples 1 to 9 and Comparative Examples 1 to 8 account for 1.0%, 1.2% and 1.5% of the weight of the spray liquid, and the content of 60% benzylbutachlor dispersible oil suspension in the spray liquid is 6%.

[0117] Adjuvant control group: the adjuvant prepared in comparative example 9 accounted for 0.9% and 1.8% of the weight of the spray liquid, and the content of 60% benzylbutachlor dispersible oil suspension in the spray liquid was 6%.

[0118] Blank control group: 60% benzylbutachlor dispersible oil suspension spray liquid, the content of 60% benzylbutachlor dispersible oil suspension in the spray liquid is 6%, and no adjuvant is added.

[0119] Each treatment was repeated 4 times in randomized blocks with protection rows around each other. The plot area was 20m 2 . The number of weeds was investigated 15d, 30d, 45d, and 60d after application. Sampling was conducted at 5 points in each plot, with a 1m 2 The number of weeds is the average of the sum of the numbers of weeds at the five sampling points. The test results are shown in Figure 1 , Figure 2 , Table 4.

[0120] Table 4 Results of the efficacy test of a series of spray solutions containing different soil-sealed herbicide adjuvants for direct-seeded rice

[0121]

[0122]

[0123] It can be seen from Table 4 above that the addition of the adjuvant of the present invention can significantly improve the efficacy and duration of the rice soil-sealed herbicide, and within 60 days after application, the number of weeds is significantly less than that of the agent without the adjuvant and the agent with the comparative adjuvant, indicating that the adjuvant of the present invention can achieve a better soil-sealed weed control effect.

[0124] It can be seen from Table 4 above that although the wetting properties of Comparative Examples 6 to 7 are better than those of the embodiment in the physical and chemical property test of Application Example 1, in actual field applications, as the concentration of the adjuvant increases, it does not actually help the effect of the soil-sealed herbicide, and even affects the effect of the pesticide.

[0125] Figure 1 , Figure 2 The results show that adding the soil-sealing herbicide adjuvant of Example 7 of the present invention can effectively seal weeds, and the effect is long-lasting.

[0126] At the same time, compared with other comparative examples of the present invention, the auxiliary agent (Comparative Example 6) obtained by omitting the dispersant (Comparative Example 5), omitting the penetrant (Comparative Example 7), or changing the ratio of the dispersant and the penetrant is used together with the 60% benzylbutachlor dispersible oil suspension, and its blocking effect on weeds is reduced and the blocking time is shortened; replacing some components in the water retaining agent (Comparative Examples 1-2), the auxiliary agent obtained also reduces the blocking effect of the 60% benzylbutachlor dispersible oil suspension on weeds, and the blocking time is also shortened; changing the preparation method of the auxiliary agent of the present invention will also reduce the blocking effect of the 60% benzylbutachlor dispersible oil suspension on weeds and shorten the blocking time.

[0127] (II) Efficacy test of rapeseed soil sealing herbicide:

[0128] The test was carried out in a rapeseed field in Shuangjiangkou Town, Heshan District, Yiyang City, Hunan Province. The rapeseed was sown directly on September 20, 2022, and the pesticide was applied the next day after sowing. The soil-sealed herbicide adjuvants of Examples 1 to 9, the soil-sealed herbicide adjuvants of Comparative Examples 1 to 9, and the soil-sealed herbicide (75% clomazone-acetylchlor emulsifiable concentrate) and water were mixed into a spraying liquid, and all of them were sprayed within 24 hours. The dilution multiple of the soil-sealed herbicide adjuvant in the spraying liquid was 700 to 1200 times, and the dilution multiple of 75% clomazone-acetylchlor emulsifiable concentrate was 250 times. The efficacy of soil-sealed herbicides for direct-seeding rapeseed in dryland was carried out in accordance with the "Field Efficacy Test Guidelines" GB / T17980.402000. The dilution conditions of each group are as follows::

[0129] Agent: 75% isoxathiapiprolin emulsifiable concentrate (commercially available, produced by Shandong Yipu Agricultural Technology Co., Ltd., registered dosage: 40-60 ml / mu, registered soil spray).

[0130] Adjuvant group: the adjuvants prepared in Examples 1 to 9 and Comparative Examples 1 to 8 were diluted 750 times, 1000 times, and 1200 times in the spray liquid, and the dilution ratio of 75% clomazone-acetochlor emulsifiable concentrate in the spray liquid was 250 times.

[0131] Adjuvant control group: the adjuvant prepared in comparative example 9 was diluted 700 times, 1100 times and 1500 times in the spray liquid, and the dilution ratio of 75% clomazone-acetochlor emulsifiable concentrate in the spray liquid was 250 times.

[0132] Blank control group: 75% clomazone-acetochlor emulsifiable concentrate, diluted 250 times in the spray solution, without adding adjuvant.

[0133] According to the above dilution method, the pesticide and adjuvant were diluted with water to 15L to make a spray solution for field efficacy test. Each treatment was repeated 3 times, arranged in random blocks, with protection rows set around, and the area of ​​the plot was 20m 2 . The number of weeds was investigated 15d, 30d, 45d, and 60d after application. Sampling was conducted at 5 points in each plot, with a 1m 2 The number of weeds is the average of the sum of the numbers of weeds at the five sampling points. The test results are shown in Table 5 below.

[0134] Table 5 Series containing different soil-sealed herbicide adjuvants Spray liquid Results of the pesticide efficacy test on direct-seeded rapeseed in dry land

[0135]

[0136]

[0137]

[0138] It can be seen from Table 5 above that the addition of the adjuvant of the present invention can significantly improve the efficacy and duration of the rapeseed soil sealing herbicide, and within 60 days after application, the number of weeds is significantly less than that of the agent group without adding adjuvant and the agent group with the adjuvant of the comparative example, indicating that the present invention achieves a better soil sealing weed control effect.

[0139] It can be seen from Table 5 above that in the physical and chemical property test of Application Example 1, the wetting properties of Comparative Examples 6 to 8 are better than those of the embodiment. However, in actual field applications, as the dilution multiple of the adjuvant decreases, the concentration of the adjuvant in the spray liquid increases, which in turn reduces the effect of the soil-sealed herbicide.

[0140] (II) Soil sealing herbicide efficacy test for seedlings (large-leaf boxwood):

[0141] It was carried out at the nursery base in Baijia Town, Liuyang City, Changsha City, Hunan Province. The large-leaf boxwood was cut on August 17, 2022, and the poisoned soil method was used the next day after cutting. The soil-sealed herbicide adjuvants of Examples 1 to 9, the soil-sealed herbicide adjuvants of Comparative Examples 1 to 9 were mixed with sand and 330 g / L of pendimethalin emulsifiable concentrate. The ratio of soil-sealed herbicide adjuvant to sand was 1:500, and the ratio of 330 g / L of pendimethalin emulsifiable concentrate to sand was 1:125. All of them can be spread within 24 hours. The soil-sealed herbicide efficacy test of dryland cutting large-leaf boxwood was carried out in accordance with the "Field Efficacy Test Guidelines" GB / T17980.402000. The specific experimental methods and experimental results are as follows:

[0142] Agent: 330 g / L pendimethalin emulsifiable concentrate (commercially available, produced by BASF Europe, registered dosage: 150-200 ml / mu, registered poisoned soil method).

[0143] Adjuvant group: Adjuvants were prepared according to Examples 1 to 9 and Comparative Examples 1 to 8, the ratio of soil-sealing herbicide adjuvant to sand was 1:500, and the ratio of 330 g / L pendimethalin emulsifiable concentrate to sand was 1:125.

[0144] Adjuvant control group: The adjuvant was prepared in Comparative Example 9, the ratio of the soil-sealing herbicide adjuvant to the sand was 1:400, and the ratio of 330 g / L pendimethalin emulsifiable concentrate to the sand was 1:125.

[0145] Blank control group: 330 g / L pendimethalin EC, the ratio of 330 g / L pendimethalin EC to sand was 1:125 without adding any adjuvant.

[0146] 330 g / L of pendimethalin EC and soil-sealing herbicide adjuvant were mixed with 25 kg of sand according to the above ratio to make poisoned soil for field efficacy test. Each treatment was repeated 3 times, arranged in random blocks, with protection rows set around, and the area of ​​the plot was 20 m 2 . The number of weeds was investigated 15, 30, 45, and 60 days after application. Sampling was conducted at 5 points in each area, with a 1m2 The number of weeds is the average of the sum of the numbers of weeds at the five sampling points. The test results are shown in Table 6 below.

[0147] Table 6 Results of the efficacy test on a series of toxic soil dryland cuttings of Euonymus japonicus containing different soil-sealing herbicide adjuvants

[0148]

[0149]

[0150] It can be seen from Table 6 above that the addition of the adjuvant of the present invention can significantly improve the efficacy and duration of the soil-sealed herbicide for seedlings (large-leaf boxwood), and within 60 days after application, the number of weeds is significantly less than that of the group without the adjuvant and the group with the comparative adjuvant, indicating that the present invention achieves a better soil-sealed weed control effect.

[0151] At the same time, compared with other comparative examples of the present invention, the auxiliary agent (Comparative Example 6) obtained by omitting the dispersant (Comparative Example 5), omitting the penetrant (Comparative Example 7), or changing the ratio of the dispersant to the pendant is used together with the dimethoate emulsifiable concentrate, and its blocking effect on weeds is reduced, and the blocking time is shortened; replacing some components in the water-retaining agent (Comparative Examples 1-2), the auxiliary agent obtained also reduces the blocking effect of the dimethoate emulsifiable concentrate on weeds, and the blocking time is also shortened; changing the preparation method of the auxiliary agent of the present invention will also reduce the blocking effect of the dimethoate emulsifiable concentrate on weeds and shorten the blocking time.

[0152] In summary, the present invention comprehensively considers the application scenarios of soil-sealed herbicides, and is composed of a mixture of water-retaining agents, film-forming agents, antioxidants, dispersants, penetrants, emulsifiers, suspending agents, and solvents in specific proportions. By accurately mixing the proportions between the components, synergistic enhancement is achieved, which can effectively improve the efficacy of soil-sealed herbicides, prolong the grass sealing time, and reduce the risk of pesticide damage.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soil-sealing herbicide adjuvant, characterized in that: The invention comprises the following raw materials in parts by weight: 1 to 3 parts by weight of a water retaining agent, 4 to 18 parts by weight of a film-forming agent, 0.5 to 3 parts by weight of an antioxidant, 1 to 6 parts by weight of a dispersant, 4 to 30 parts by weight of a penetrant, 5 to 20 parts by weight of an emulsifier, 0.2 to 2 parts by weight of a suspending agent and 20 to 90 parts by weight of a solvent, wherein: The weight ratio of the water retaining agent to the film forming agent is 1:4-7; The weight ratio of the dispersant to the penetrant is 1:4-8; The water retaining agent is selected from one or more hyaluronic acids with a molecular weight of 1800KDa to 2200KDa; 2000KDa hyaluronic acid accounts for 30% to 100% of the weight of the water retaining agent; the water retaining agent accounts for 1.8 to 3% of the weight of the soil sealing herbicide adjuvant; The film-forming agent is selected from one or more chitosans with a molecular weight of 50 to 90 Kda; 70 Kda chitosan accounts for 18% to 100% of the weight of the film-forming agent; The antioxidant is selected from one or more of water-soluble vitamin E and tea polyphenols; in the antioxidant, water-soluble vitamin E accounts for 60% to 100% of the weight of the antioxidant; The dispersant comprises soybean lecithin and hydrogenated lecithin in a weight ratio of 1:(0.2-6); The penetrant is selected from one or more of fatty alcohol polyoxyethylene ether, glycerol, polyether-modified silicone oil, fatty acid polyoxyethylene ether, and fatty amine polyoxyethylene ether; The emulsifier is selected from one or more of Tween series, Nongru 500# series, 600# series, 400# series and Span series; The suspending agent is selected from one or more of xanthan gum, sorbitol, gum arabic, sodium alginate, agar, and methylcellulose.

2. The soil-sealing herbicide adjuvant according to claim 1, characterized in that The soil sealing herbicide adjuvant comprises the following raw materials in parts by weight: 1.5 to 3 parts by weight of a water retaining agent, 8 to 18 parts by weight of a film former, 0.8 to 3 parts by weight of an antioxidant, 1 to 6 parts by weight of a dispersant, 4 to 28 parts by weight of a penetrant, 5 to 18 parts by weight of an emulsifier, 0.6 to 2 parts by weight of a suspending agent, and 25 to 90 parts by weight of a solvent.

3. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The soil sealing herbicide adjuvant comprises the following raw materials in parts by weight: 1.8 to 3 parts by weight of a water retaining agent, 8 to 18 parts by weight of a film former, 0.8 to 3 parts by weight of an antioxidant, 1 to 6 parts by weight of a dispersant, 4 to 25 parts by weight of a penetrant, 5 to 18 parts by weight of an emulsifier, 0.6 to 2 parts by weight of a suspending agent, and 30 to 85 parts by weight of a solvent.

4. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The soil sealing herbicide adjuvant comprises the following raw materials in parts by weight: 2 to 3 parts by weight of a water retaining agent, 12 to 18 parts by weight of a film former, 1.2 to 3 parts by weight of an antioxidant, 1 to 5 parts by weight of a dispersant, 4 to 25 parts by weight of a penetrant, 5 to 18 parts by weight of an emulsifier, 0.9 to 2 parts by weight of a suspending agent, and 30 to 85 parts by weight of a solvent.

5. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The weight ratio of the water retaining agent to the film forming agent is 1:4-6.

8.

6. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The weight ratio of the water retaining agent to the film forming agent is 1:4-6.

7. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The weight ratio of the water retaining agent to the film forming agent is 1:5.3-6.

8. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The weight ratio of the dispersant to the penetrant is 1:4-7.

2.

9. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The weight ratio of the dispersant to the penetrant is 1:

5.

10. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The dosage form of soil-sealed herbicide adjuvant is suspoemulsion.

11. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The water retaining agent is one or more of 1800Kda hyaluronic acid, 2000Kda hyaluronic acid and 2200Kda hyaluronic acid.

12. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: In the water-retaining agent, the weight ratio of 1800Kda hyaluronic acid, 2000Kda hyaluronic acid and 2200Kda hyaluronic acid is (0-1.5):(0-2):(0-1).

13. The soil-sealing herbicide adjuvant according to claim 1, characterized in that In the water-retaining agent, the weight ratio of 1800Kda hyaluronic acid, 2000Kda hyaluronic acid and 2200Kda hyaluronic acid is (0-1.5): (0.8-2): (0-1).

14. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The film-forming agent is selected from one or more of 50Kda chitosan, 70Kda chitosan and 90Kda chitosan.

15. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: In the film-forming agent, the weight ratio of 50Kda chitosan, 70Kda chitosan and 90Kda chitosan is (0-8): (1-12): (0-5).

16. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: In the antioxidant, the weight ratio of water-soluble vitamin E to tea polyphenols is (0.2-3): (0-1).

17. The soil-sealing herbicide adjuvant according to claim 1, characterized in that In the antioxidant, the weight ratio of water-soluble vitamin E to tea polyphenols is (0.5-3): (0-1).

18. The soil-sealing herbicide adjuvant according to claim 1, characterized in that: The weight ratio of soybean lecithin to hydrogenated lecithin is 1:(0.6-6).

19. The soil-sealing herbicide adjuvant according to any one of claims 1 to 18, characterized in that In the penetrant, the weight ratio of fatty alcohol polyoxyethylene ether, glycerol, polyether modified silicone oil, fatty acid polyoxyethylene ether and fatty amine polyoxyethylene ether is (0-22):(0-30):(0-5):(0-4):(0-4).

20. The soil-sealing herbicide adjuvant according to any one of claims 1 to 18, characterized in that In the penetrant, the weight ratio of fatty alcohol polyoxyethylene ether, glycerol, polyether modified silicone oil, fatty acid polyoxyethylene ether and fatty amine polyoxyethylene ether is (1-8):(0-14):(0-5):(0-4):(0-4).

21. The soil-sealing herbicide adjuvant according to any one of claims 1 to 18, characterized in that The solvent is selected from one or more of deionized water and ethanol.

22. The soil-sealing herbicide adjuvant according to any one of claims 1 to 18, characterized in that In the solvent, the weight ratio of deionized water to ethanol is (4.8-58):(0-45).

23. The soil-sealing herbicide adjuvant according to any one of claims 1 to 18, characterized in that In the solvent, the weight ratio of deionized water to ethanol is (27.6-58):(0-37.7).

24. The soil-sealing herbicide adjuvant according to any one of claims 1 to 18, characterized in that Water accounts for 9% to 100% of the solvent weight.

25. The soil-sealing herbicide adjuvant according to any one of claims 1 to 18, characterized in that Water accounts for 42% to 100% of the solvent weight.

26. A method for preparing the soil-sealing herbicide adjuvant according to any one of claims 1 to 25, characterized in that: include: The water retaining agent, film former, antioxidant, dispersant, penetrant, emulsifier, suspending agent and solvent are mixed and dispersed, micro jet emulsification is performed, and then the suspending agent is added to obtain the soil sealing herbicide adjuvant.

27. The preparation method according to claim 26, characterized in that: The microfluidization emulsification method is: under a pressure of 40 MPa, heating to 45-55° C. and performing microfluidization emulsification twice.

28. The preparation method according to claim 26, characterized in that: Microfluidization emulsification is carried out in a microfluidizer high pressure homogenizer.

29. A soil-sealing herbicide comprising an active ingredient of a herbicidal pesticide and the soil-sealing herbicide adjuvant according to any one of claims 1 to 25 or the soil-sealing herbicide adjuvant prepared by the preparation method according to any one of claims 26 to 28.

30. The soil-sealing herbicide of claim 29, wherein: The active ingredient of the herbicidal pesticide is selected from one or more of S-isopropylamine, acetochlor, pretilachlor, butachlor, benzylsulfuron-methyl, pyrazosulfuron-methyl, pendimethalin, clomazone and atrazine.

31. A method for using the soil-sealing herbicide adjuvant according to any one of claims 1 to 25, or the soil-sealing herbicide adjuvant prepared by the preparation method according to any one of claims 26 to 28, or the soil-sealing herbicide according to claim 29 or 30, characterized in that: The soil-sealed herbicide adjuvant and the herbicide are diluted with water to form a spray liquid and then applied to the soil in a spraying form or mixed with sand, fertilizer or soil.

32. The method of use according to claim 31, characterized in that: The soil-sealing herbicide adjuvant and herbicide spraying liquid are divided into a spraying liquid in which the soil-sealing herbicide adjuvant accounts for 1% to 1.5% of the weight of the spraying liquid, or a spraying liquid in which the soil-sealing herbicide adjuvant is diluted 700 to 1200 times according to different spraying methods.

33. The method of use according to claim 31, characterized in that: The mixing ratio of the soil-sealed herbicide adjuvant to sand, fertilizer or soil is 1:400-600.

34. Use of the soil-sealing herbicide adjuvant according to any one of claims 1 to 25, or the soil-sealing herbicide adjuvant prepared by the preparation method according to any one of claims 26 to 28 in preparing a soil sealer, characterized in that: The soil sealing agent is a soil sealing herbicide.

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