High-efficiency pollution-free leaf surface blocking and controlling agent and preparation method thereof

Abstract

The present invention relates to the field of agricultural environmental protection, and discloses an efficient pollution-free leaf surface resistance control agent and a preparation method thereof, the efficient pollution-free leaf surface resistance control agent comprises: a traditional Chinese medicine extraction liquid, which is obtained by extraction of milkvetch root, honeysuckle flower, dandelion and Chinese magnoliavine according to a ratio of 1: 1: 0.5: 0.3, and the use amount is 25-30% of the total mass; the chelating agent is ethylene diamine tetraacetic acid, and the dosage of the chelating agent is 5%-10% of the total mass of the traditional Chinese medicine extracting solution; the synergist adopts a seaweed extract, and the use amount of the synergist is 3-5% of the total mass; the stabilizer is selected from sodium carboxymethyl cellulose, and the use amount of the stabilizer is 1%-2% of the total mass; and water which accounts for 60-70% of the total mass and is used as a solvent to adjust the concentration of the whole formula. The formula of the leaf surface resistance and control agent is based on natural traditional Chinese medicine components including plant extracts such as astragalus membranaceus, honeysuckle, dandelion and schisandra chinensis, the components are natural, non-toxic and small in environmental pollution, toxicity of heavy metal to plants can be remarkably reduced, and the leaf surface resistance and control agent almost has no negative influence on soil and the ecological environment and can be safely applied to crops; no residual harm exists.

Description

Technical Field

[0001] The invention relates to the field of agricultural environmental protection, and in particular to a highly efficient and pollution-free leaf surface barrier control agent and a preparation method thereof. Background Art

[0002] At present, the problem of heavy metal pollution faced by crops during their growth is becoming increasingly serious, especially the pollution of heavy metals such as mercury, cadmium and lead, which not only seriously affects the growth and yield of crops, but also poses a major threat to food safety. The existing methods for preventing and controlling heavy metal pollution mainly include soil improvement, plant extraction and chemical remediation, but these methods generally have many disadvantages and limitations.

[0003] Although the commonly used chemical chelating agents (such as EDTA, DTPA, etc.) can effectively chelate heavy metal ions, these chelating agents themselves are toxic and difficult to degrade. They can easily enter the groundwater or the surrounding environment through rainwater leaching, causing serious secondary pollution. This pollution not only threatens the long-term health of the soil, but may also affect the quality of groundwater and ultimately have an adverse effect on human health through the food chain. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a highly efficient and pollution-free foliar barrier and a preparation method thereof, which solves the problem that although the currently commonly used chemical chelating agents (such as EDTA, DTPA, etc.) can effectively chelate heavy metal ions, these chelating agents themselves have certain toxicity and are not easily degraded.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a highly efficient and pollution-free leaf surface control agent, comprising:

[0006] The Chinese medicine extract is obtained by extracting astragalus, honeysuckle, dandelion and schisandra chinensis in a ratio of 1:1:0.5:0.3, and the amount used is 25% to 30% of the total mass;

[0007] Chelating agent: disodium ethylenediaminetetraacetate is selected, and the dosage is 5% to 10% of the total weight of the Chinese medicine extract;

[0008] The synergist is seaweed extract, the dosage is 3% to 5% of the total weight;

[0009] Stabilizer: sodium carboxymethyl cellulose, the dosage is 1% to 2% of the total mass;

[0010] Water, used in an amount of 60% to 70% of the total mass, is used as a solvent to adjust the concentration of the entire formula.

[0011] Preferably, the method comprises the following steps:

[0012] S1. Extraction of Chinese herbal medicine:

[0013] Astragalus, honeysuckle, dandelion and Schisandra chinensis were added into water in a ratio of 1:1:0.5:0.3, and the mixture was heated in a water bath for continuous extraction, and then a clear Chinese medicine extract was obtained by filtering.

[0014] S2. Chelation treatment:

[0015] The Chinese medicine extract obtained in step S1 is mixed with the chelating agent disodium ethylenediaminetetraacetate, and stirred thoroughly to make them evenly blended, and then allowed to stand at room temperature so that the chelating agent can fully combine with the heavy metal ions to form a stable complex;

[0016] S3, efficiency enhancement treatment:

[0017] Adding the seaweed extract to the complex in step S2, and continuing to stir and mix;

[0018] S4, stable processing:

[0019] Add sodium carboxymethyl cellulose to the mixed solution at a ratio of 1% to 2% of the total mass, and stir to allow all ingredients to be fully dissolved and evenly distributed in the solution;

[0020] S5, add water to adjust:

[0021] Water is added in an amount of 60% to 70% of the total mass, and the entire formula is stirred appropriately to achieve a suitable spraying concentration, thereby obtaining a uniform foliar control agent.

[0022] Preferably, the extraction conditions in step S1 are heating in a water bath at 75° C. to 85° C. and continuous extraction for 1.5 to 2.5 hours.

[0023] Preferably, the chelation treatment in step S2 includes standing at room temperature for 20 to 40 minutes.

[0024] Preferably, the synergist seaweed extract in step S3 is added by continuous stirring for 15 to 25 minutes to make the solution uniform.

[0025] Preferably, the stabilizer sodium carboxymethyl cellulose in step S4 is added by stirring for 10 to 20 minutes so that all ingredients are fully dissolved and evenly distributed.

[0026] Preferably, the foliar barrier is used to inhibit the absorption of cadmium, mercury or lead by crops by chelating heavy metal ions and reducing their bioavailability, and is sprayed once every 7 to 10 days for 3 to 4 times.

[0027] The present invention provides a highly efficient and pollution-free leaf surface control agent and a preparation method thereof.

[0028] Beneficial effects:

[0029] 1. The formula of the foliar barrier agent of the present invention is based on natural Chinese medicinal ingredients, including plant extracts such as astragalus, honeysuckle, dandelion and schisandra chinensis. These ingredients are natural, non-toxic, have little pollution to the environment, can significantly reduce the toxicity of heavy metals to plants, and have almost no negative impact on the soil and ecological environment. They can be safely applied to crops without any residual harm.

[0030] 2. The present invention adopts Chinese herbal extract as the main ingredient, and reduces the accumulation of heavy metals in crops by directly spraying it on the leaves of crops. The Chinese herbal extract can not only inhibit the absorption of heavy metals, but also has the effect of detoxification and enhancing crop resistance, avoiding the trouble of special treatment of enriched plants in plant extraction method, and is simple to operate and effective quickly.

[0031] 3. The foliar barrier agent of the present invention uses disodium ethylenediaminetetraacetic acid (EDTA) as a chelating agent, which is applied to crop leaves by spraying, avoiding the instability of the chelating agent in the soil and the possible secondary pollution problems. Foliar application can accurately chelate heavy metals on plant leaves, reduce their biological effectiveness, and achieve an environmentally friendly and efficient barrier effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a flow chart of the preparation method of the highly efficient and pollution-free leaf surface barrier agent. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only 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.

[0034] Please see attached Figure 1 The embodiment of the present invention provides a highly efficient and pollution-free leaf surface control agent, comprising:

[0035] The Chinese medicine extract is obtained by extracting astragalus, honeysuckle, dandelion and schisandra chinensis in a ratio of 1:1:0.5:0.3, and the amount used is 25% to 30% of the total mass;

[0036] Chelating agent: disodium ethylenediaminetetraacetate is selected, and the dosage is 5% to 10% of the total weight of the Chinese medicine extract;

[0037] The synergist is seaweed extract, the dosage is 3% to 5% of the total weight;

[0038] Stabilizer: sodium carboxymethyl cellulose, the dosage is 1% to 2% of the total mass;

[0039] Water, used in an amount of 60% to 70% of the total mass, is used as a solvent to adjust the concentration of the entire formula.

[0040] Specifically, astragalus, honeysuckle, dandelion, and schisandra are selected to enhance the resistance of plants to heavy metals. Astragalus has the effects of enhancing immunity and anti-oxidation; honeysuckle has the effects of detoxification and anti-inflammatory; dandelion helps detoxification and detoxification; and schisandra has the function of enhancing stress resistance. Through the synergistic effect of these Chinese medicines, the toxicity of heavy metals to plants can be effectively reduced.

[0041] Disodium Ethylenediaminetetraacetate (EDTA): EDTA is a common chelating agent used to bind to heavy metal ions to form stable complexes, reducing the bioavailability and toxicity of heavy metals. In foliar control agents, EDTA helps prevent these harmful elements from being absorbed by plants by binding to heavy metals.

[0042] Seaweed extract: Seaweed extract is rich in a variety of natural bioactive substances, such as polysaccharides and amino acids, which help improve the resistance of plants and increase tolerance to heavy metals. Its synergistic effect makes foliar control agents more effective in inhibiting heavy metal pollution.

[0043] Sodium carboxymethyl cellulose (CMC): CMC is a commonly used stabilizer that can increase the viscosity of the solution and prevent the stratification and precipitation of the components. In foliar control agents, the role of CMC is to maintain the stability of the solution so that the agent can be more evenly covered on the leaf surface after spraying.

[0044] Water: Water is used as a solvent to adjust the concentration of the entire formula. It ensures that all ingredients can be evenly mixed together to form a uniform solution for subsequent spray application.

[0045] A method for preparing a highly efficient and pollution-free leaf surface control agent comprises the following steps:

[0046] S1. Extraction of Chinese herbal medicine:

[0047] Astragalus, honeysuckle, dandelion and Schisandra chinensis were added into water in a ratio of 1:1:0.5:0.3, and the mixture was heated in a water bath for continuous extraction, and then a clear Chinese medicine extract was obtained by filtering.

[0048] S2. Chelation treatment:

[0049] The Chinese medicine extract obtained in step S1 is mixed with the chelating agent disodium ethylenediaminetetraacetate, and stirred thoroughly to make them evenly blended, and then allowed to stand at room temperature so that the chelating agent can fully combine with the heavy metal ions to form a stable complex;

[0050] S3, efficiency enhancement treatment:

[0051] Adding the seaweed extract to the complex in step S2, and continuing to stir and mix;

[0052] S4, stable processing:

[0053] Add sodium carboxymethyl cellulose to the mixed solution at a ratio of 1% to 2% of the total mass, and stir to allow all ingredients to be fully dissolved and evenly distributed in the solution;

[0054] S5, add water to adjust:

[0055] Water is added in an amount of 60% to 70% of the total mass, and the entire formula is stirred appropriately to achieve a suitable spraying concentration, thereby obtaining a uniform foliar control agent.

[0056] The extraction conditions in step S1 are heating in a water bath at 75° C. to 85° C. and continuous extraction for 1.5 to 2.5 hours.

[0057] Specifically, astragalus, honeysuckle, dandelion and schisandra chinensis are added to water in proportion and extracted by water bath heating. The purpose of this process is to extract the effective ingredients in Chinese medicinal materials. These Chinese medicinal ingredients have the functions of detoxification, anti-oxidation and enhancing plant resistance, and can help crops resist the toxicity of heavy metals.

[0058] Through 1.5 to 2.5 hours of extraction, the main active ingredients in the medicinal materials can be fully released, so that the extract contains a large amount of active ingredients. The active ingredients in these extracts will play a role in inhibiting heavy metals and enhancing plant resistance in subsequent steps.

[0059] The chelation treatment in step S2 includes standing at room temperature for 20 to 40 minutes.

[0060] Specifically, the Chinese medicine extract obtained in step S1 is mixed with disodium ethylenediaminetetraacetate (EDTA), stirred thoroughly and left to stand for a period of time. EDTA is a chelating agent that can combine with heavy metal ions to form a stable complex.

[0061] After EDTA chelates heavy metal ions, it can reduce the bioavailability and toxicity of heavy metals, making it more difficult for heavy metals to be absorbed by plants. The role of this step is one of the core, which significantly reduces the toxicity of heavy metals to plants by forming stable complexes with heavy metal ions.

[0062] The synergist seaweed extract in step S3 is added by continuously stirring for 15 to 25 minutes to make the solution uniform.

[0063] Specifically, add seaweed extract to the mixture and stir evenly. Seaweed extract is rich in polysaccharides and other bioactive substances and has a good synergistic effect.

[0064] Seaweed extract is introduced in this step to enhance the plant's tolerance to heavy metals and improve the overall effect of the foliar barrier. By continuously stirring for 15 to 25 minutes, all ingredients are evenly mixed to maximize their synergistic effect on plants, enabling them to better cope with heavy metal stress.

[0065] The stabilizer sodium carboxymethyl cellulose in step S4 is added by stirring for 10 to 20 minutes so that all ingredients are fully dissolved and evenly distributed.

[0066] Specifically, sodium carboxymethyl cellulose (CMC) is added to the mixed solution and stirred for 10 to 20 minutes. CMC, as a stabilizer, can increase the viscosity of the solution, so that all components are evenly distributed in the solution to prevent precipitation or stratification.

[0067] The addition of CMC ensures the stability of the foliar barrier agent, prevents the components from stratifying or precipitating in the solution, ensures that the concentration of the ingredients applied each time during spraying is consistent, and evenly covers the crop leaves, thereby effectively exerting its barrier effect.

[0068] Foliar inhibitors are used to inhibit the absorption of cadmium, mercury or lead by crops by chelating heavy metal ions and reducing their bioavailability. They are sprayed once every 7 to 10 days for 3 to 4 times.

[0069] Specifically, water is added to the mixture and the solution is adjusted to a suitable spraying concentration by stirring. Water is used as the main solvent to adjust the concentration of the entire formulation to ensure effective coverage of the agent.

[0070] The addition of water allows the foliar control agent to reach a concentration suitable for spraying, ensuring that the agent is evenly distributed on the leaves of crops. By stirring, each part of the solution contains the same active ingredients, so that when applied, it can evenly cover the leaves of the crop and achieve the best control effect.

[0071] The following is an introduction in conjunction with specific embodiments:

[0072] Example 1: Foliar inhibitor for inhibiting cadmium

[0073] Ingredients ratio:

[0074] Chinese medicine extract (astragalus, honeysuckle, dandelion, schisandra chinensis): 1:1:0.5:0.3, accounting for 25% of the total mass.

[0075] Chelating agent (EDTA): 7% of the total mass of the extract.

[0076] Synergist (seaweed extract): 4% of the total mass.

[0077] Stabilizer (CMC): 1% of the total mass.

[0078] Water: 62.2% of the total mass.

[0079] Preparation steps:

[0080] Add Chinese medicinal materials into water according to proportion, heat in a water bath at 75°C to 85°C, extract for 1.5 to 2.5 hours, and filter to obtain the extract.

[0081] Add EDTA chelating agent, stir well and let stand for 20 to 40 minutes to chelate cadmium.

[0082] Add seaweed extract and stir for 15 to 25 minutes to enhance heavy metal tolerance.

[0083] Add CMC stabilizer and stir for 10 to 20 minutes to ensure uniform distribution of ingredients.

[0084] Directions:

[0085] Dilute to 5 times concentration and spray once every 10 days for 3 consecutive times.

[0086] Effect: Chelate cadmium to form a stable complex and reduce the absorption of cadmium by crops.

[0087] Example 2: Foliar barrier for multiple heavy metal pollution in arid environment

[0088] Ingredients ratio:

[0089] Chinese medicine extract (astragalus, honeysuckle, dandelion, schisandra chinensis): 1:1:0.5:0.3, accounting for 30% of the total mass.

[0090] Chelating agent (EDTA): 6% of the total mass of the extract.

[0091] Synergist (seaweed extract): 5% of the total mass.

[0092] Stabilizer (CMC): 2% of the total mass.

[0093] Water: 56% of the total mass.

[0094] Preparation steps:

[0095] The Chinese medicinal materials are added into water according to a certain proportion, and the extraction is carried out by heating in a water bath at 75° C. to 85° C. for 1.5 to 2.5 hours, and the Chinese medicinal extract is obtained by filtering.

[0096] Add EDTA, stir well and let stand for 30 minutes to ensure that heavy metals (such as cadmium, lead, mercury, etc.) form a stable complex with EDTA.

[0097] Add seaweed extract and stir for 20 minutes to enhance the plant's resistance to heavy metals and drought stress.

[0098] Add CMC and stir for 15 minutes to ensure the stability and homogeneity of the solution.

[0099] Directions:

[0100] Dilute to 15 times concentration and spray once every 14 days for 2 consecutive times.

[0101] Effect: Provides long-term heavy metal control effect in arid environments, while reducing the loss of pesticides caused by drought.

[0102] Summary of Examples

[0103] These two examples demonstrate the specific application of foliar barrier agents under different environmental and pollution conditions. By adjusting the ratio and dosage of Chinese medicine extracts, chelating agents and synergists, the optimal heavy metal barrier effect can be achieved for specific heavy metal pollution problems and crop needs. In addition, by optimizing the preparation steps and usage methods, the effectiveness and durability of the agent under different environmental conditions (such as humidity, drought, etc.) are ensured.

[0104] Table 1 Comparison of final properties of different embodiments

[0105]

[0106]

[0107] Table summary:

[0108] Control target: The control target of each embodiment is different. Embodiment 1 is aimed at cadmium pollution, while Embodiment 2 is applicable to multiple heavy metal pollution, and performs well especially in arid environments.

[0109] Environmental adaptability: Example 1 is suitable for ordinary planting environments, while Example 2 is specially designed for heavy metal pollution in arid environments.

[0110] Targetedness of chelating agent: In all embodiments, the concentration of chelating agent EDTA is different to suit specific heavy metal pollution targets. The main function of EDTA is to form stable complexes with heavy metal ions to reduce their toxicity.

[0111] Spraying frequency and effect: The spraying frequency of Example 1 is high to quickly inhibit the absorption of heavy metals, while Example 2 has a low spraying frequency due to its long-term design, spraying once every 14 days.

[0112] Detailed description of the form fields

[0113] Main ingredient ratio:

[0114] This field describes the specific ratio of different ingredients in each example. Different ratios of ingredients affect the overall effect and pertinence of the foliar control agent.

[0115] Blocking target:

[0116] This field describes the type of heavy metal that each embodiment is mainly targeting. Embodiment 1 targets cadmium pollution, while Embodiment 2 is applicable to comprehensive heavy metal pollution (including cadmium, mercury, lead, etc.), especially to environments where multiple heavy metal pollutions coexist.

[0117] Environmental adaptability:

[0118] This field describes the applicability of each embodiment in different environments. Embodiment 1 is suitable for ordinary planting environments, while Embodiment 2 is more suitable for arid or extreme environments due to the use of a higher stabilizer ratio, and can provide long-term protection under harsh conditions.

[0119] Functions of Chinese herbal medicine ingredients:

[0120] The effect of the Chinese herbal ingredients in each example is slightly different. All examples utilize the detoxification, anti-oxidation and stress resistance enhancement properties of Chinese herbal medicines. In Example 2, resistance to drought stress is particularly emphasized, and these Chinese herbal ingredients help crops improve their tolerance to extreme environments.

[0121] Chelating agent action:

[0122] Disodium ethylenediaminetetraacetate (EDTA) is a chelating agent that combines with heavy metal ions to form a stable complex and reduce the toxicity of heavy metals.

[0123] Functions of synergists:

[0124] Seaweed extract is used as a synergist to improve the heavy metal tolerance and stress resistance of plants. In Example 2, the concentration of the synergist is higher to ensure that the plants can still maintain strong resistance under drought conditions.

[0125] Stabilizer function:

[0126] Sodium carboxymethyl cellulose (CMC) is used as a stabilizer, and its main function is to prevent the precipitation of components and maintain the uniformity of the drug. Under drought conditions (Example 2), the role of the stabilizer is particularly important because a higher stabilizer concentration can help prevent uneven components and reduced efficacy caused by water evaporation.

[0127] Spraying frequency:

[0128] This field describes the appropriate spraying frequency for each example during application. Example 1 has a higher spraying frequency to ensure that the absorption of heavy metals can be blocked in time. However, Example 2 is designed as a long-acting formula, so the spraying frequency is relatively low, and spraying once every 14 days is sufficient.

[0129] Lasting Effect:

[0130] This field describes the duration of the foliar barrier agent on the leaves. The duration of Example 1 is moderate and suitable for a relatively humid environment. However, due to its component ratio and formula design, Example 2 has a longer duration in arid environments, ensuring the effectiveness of the agent.

[0131] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly efficient and pollution-free leaf surface control agent, characterized in that: include: The Chinese medicine extract is obtained by extracting astragalus, honeysuckle, dandelion and schisandra chinensis in a ratio of 1:1:0.5:0.3, and the amount used is 25% to 30% of the total mass; Chelating agent: disodium ethylenediaminetetraacetate is selected, and the dosage is 5% to 10% of the total weight of the Chinese medicine extract; The synergist is seaweed extract, the dosage is 3% to 5% of the total weight; Stabilizer: sodium carboxymethyl cellulose, the dosage is 1% to 2% of the total mass; Water, used in an amount of 60% to 70% of the total mass, is used as a solvent to adjust the concentration of the entire formula.

2. A method for preparing a highly efficient and pollution-free leaf surface control agent, characterized in that: The high-efficiency pollution-free leaf surface control agent used in claim 1 comprises the following steps: S1. Extraction of Chinese herbal medicine: Astragalus, honeysuckle, dandelion and Schisandra chinensis were added into water in a ratio of 1:1:0.5:0.3, and the mixture was heated in a water bath for continuous extraction, and then a clear Chinese medicine extract was obtained by filtering. S2. Chelation treatment: The Chinese medicine extract obtained in step S1 is mixed with the chelating agent disodium ethylenediaminetetraacetate, and stirred thoroughly to make them evenly blended, and then allowed to stand at room temperature so that the chelating agent can fully combine with the heavy metal ions to form a stable complex; S3, efficiency enhancement treatment: Adding the seaweed extract to the complex in step S2, and continuing to stir and mix; S4, stable processing: Add sodium carboxymethyl cellulose to the mixed solution at a ratio of 1% to 2% of the total mass, and stir to allow all ingredients to be fully dissolved and evenly distributed in the solution; S5, add water to adjust: Water is added in an amount of 60% to 70% of the total mass, and the entire formula is stirred appropriately to achieve a suitable spraying concentration, thereby obtaining a uniform foliar control agent.

3. The method for preparing the high-efficiency pollution-free leaf surface control agent according to claim 2, characterized in that: The extraction conditions in step S1 are heating in a water bath at 75° C. to 85° C. and continuous extraction for 1.5 to 2.5 hours.

4. The method for preparing the high-efficiency pollution-free leaf surface control agent according to claim 2, characterized in that: The chelation treatment in step S2 includes standing at room temperature for 20 to 40 minutes.

5. The method for preparing the high-efficiency pollution-free leaf surface control agent according to claim 2, characterized in that: The synergist seaweed extract in step S3 is added by continuously stirring for 15 to 25 minutes to make the solution uniform.

6. The method for preparing the highly efficient and pollution-free leaf surface control agent according to claim 2, characterized in that: The addition of the stabilizer sodium carboxymethyl cellulose in step S4 is stirred for 10 to 20 minutes so that all ingredients are fully dissolved and evenly distributed.

7. The method for preparing the highly efficient and pollution-free leaf surface control agent according to claim 2, characterized in that: The foliar barrier agent is used to inhibit the absorption of cadmium, mercury or lead by crops by chelating heavy metal ions and reducing their biological effectiveness. It is sprayed once every 7 to 10 days for 3 to 4 times in succession.

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