Production method and application of agricultural salt and alkali elimination agent

Abstract

The invention relates to the field of agriculture, and discloses an agricultural salt and alkali elimination production method and application thereof, the method comprises the following steps: S1, preparing a salt and alkali elimination formula, the formula comprises 10-20 parts by mass of sulfuric acid and 5-15 parts by mass of hydrochloric acid; 0.5-2 parts by mass of a nano metal catalyst; 2-5 parts by mass of a microbial community; 10-20 parts by mass of an organic fertilizer; 50 to 60 parts by mass of water; s2, uniformly mixing the components according to the formula to obtain a saline-alkali digestion raw material solution; s3, reacting the obtained salt-alkali elimination raw material solution to generate a salt-alkali elimination finished product solution; and S4, concentrating or drying the obtained salt-alkali digestion finished product liquid to obtain the finished salt-alkali digestion product. According to the method, efficient remediation of the soil with different saline-alkali degrees is achieved, and compared with a common single reaction condition in the prior art, flexible adjustment is achieved according to different characteristics of lightness, moderately and heavily of the soil, so that each type of saline-alkali soil can obtain the optimal remediation effect.

Description

Technical Field

[0001] The invention relates to the technical field of agriculture, and in particular to a method for producing agricultural salt-alkali removal and application thereof. Background Art

[0002] At present, with the acceleration of industrialization and changes in agricultural production methods, the problem of saline-alkali land is becoming increasingly serious, especially in some parts of my country, where the area of ​​saline-alkali soil is expanding, which seriously restricts the sustainable development of agriculture. The main problem of saline-alkali soil is that excessive salt and alkaline substances inhibit plant growth, which greatly reduces the fertility of the soil and makes the growth conditions of crops extremely poor. Therefore, how to effectively improve the quality of saline-alkali soil and promote the recovery of its agricultural productivity has become a technical problem that needs to be solved urgently.

[0003] At present, the methods for improving saline-alkali land mainly include chemical methods, biological methods and their combined methods. Among them, the chemical method neutralizes the alkaline components in saline-alkali soil by applying acidic substances. Although it can play a certain role in repairing saline-alkali land in the short term, long-term use will often cause soil acidification and lead to deterioration of soil structure. In addition, relying solely on chemical treatment often takes a long time to continuously improve soil structure, and its repair effect is not universal in different types of saline-alkali land, especially in the repair of severe saline-alkali land, the effect is relatively limited.

[0004] The bioremediation method uses biological means such as the introduction of microbial communities or plants to repair saline-alkali soil. Although this method is highly environmentally friendly and sustainable, the types and activities of microorganisms are greatly affected by soil conditions and the external environment, resulting in unstable effects. In addition, under extreme saline-alkali conditions, the activity of microbial communities is greatly inhibited, making it difficult for them to play their due role.

[0005] Overall, the existing saline-alkali land remediation technology has many shortcomings. Single chemical methods can easily lead to soil acidification and environmental pollution, while single biological remediation methods are limited by environmental factors, resulting in slow remediation effects and speeds.

[0006] Therefore, the present invention proposes an agricultural salt-alkali removal production method and application thereof to solve the deficiencies of the prior art. Summary of the invention

[0007] In view of the shortcomings of the prior art, the present invention provides an agricultural salt-alkali removal production method and application thereof, which solves the problems in the prior art that the saline-alkali land restoration effect is slow and unstable, and it is difficult to carry out efficient restoration for different types of saline-alkali land.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: The first aspect of the present invention provides a method for producing agricultural salt-alkali removal, comprising the following steps: S1. Prepare a salt-alkali disinfection formula, the formula comprising: Sulfuric acid 10-20 parts by mass; 5-15 parts by weight of hydrochloric acid; 0.5-2 parts by mass of nano metal catalyst; Microbial community 2-5 parts by weight; 10-20 parts by weight of organic fertilizer; Water 50-60 parts by weight; S2, mixing the above formula evenly to obtain a salt-alkali elimination raw material solution; S3, reacting the obtained salt-alkali dissolving raw material liquid to generate a salt-alkali dissolving finished liquid; S4. Concentrate or dry the obtained salt-alkali disinfectant product liquid to obtain a finished salt-alkali disinfectant product.

[0009] Preferably, the mass ratio of sulfuric acid to hydrochloric acid is 1:1-2:1.

[0010] Preferably, the nano metal catalyst is nano titanium, nano copper oxide, or a mixture of nano titanium and nano copper oxide.

[0011] Preferably, the microbial community is halophilic bacteria, nitrogen-fixing bacteria, or a mixture of halophilic bacteria and nitrogen-fixing bacteria.

[0012] Preferably, the organic fertilizer is humus, compost, or a mixture of humus and compost.

[0013] Preferably, the salt-alkali disinfectant formula is subjected to mechanical stirring or ultrasonic treatment to completely dissolve and uniformly mix the components.

[0014] Preferably, the temperature in the salt-alkali elimination raw material solution reaction step is controlled between 25-40° C., and the reaction time is 30-90 minutes.

[0015] Preferably, the formula further comprises 1-3 parts by mass of an organic acid, wherein the organic acid is citric acid, which is used to enhance solubility and reaction rate.

[0016] The second aspect of the present invention provides a salt-alkali disinfectant produced by a method for producing agricultural salt-alkali disinfectant in the first aspect.

[0017] The third aspect of the present invention provides the use of the salt-alkali disinfectant produced by the agricultural salt-alkali disinfectant production method of the second aspect in saline-alkali land.

[0018] The present invention provides a method for producing agricultural salt-alkali removal and its application, which has the following beneficial effects: 1. The present invention achieves efficient restoration of soils with different salinities. Compared with the single reaction conditions commonly used in the prior art, the present invention flexibly adjusts according to the different characteristics of mild, moderate and severe soils, so that each type of saline-alkali land can achieve the best restoration effect. This method solves the limitations of traditional technologies that the treatment is too simple or difficult to adapt to different soil conditions, and significantly improves the pertinence and effect of soil restoration.

[0019] 2. The present invention successfully accelerates the conversion and removal of salt in saline-alkali soil by optimizing the ratio of sulfuric acid to hydrochloric acid and adding nano-metal catalysts. Compared with the single chemical treatment method commonly used in the prior art, the present invention not only improves the reaction rate, but also significantly reduces the accumulation of chlorides and carbonates in the soil, solving the problems of slow effect and unstable long-term restoration of traditional technologies.

[0020] 3. The present invention makes the restoration effect of saline-alkali soil more significant. By introducing halophilic bacteria and nitrogen-fixing bacteria, the present invention greatly enhances the biological restoration function of the soil, thereby improving the recovery capacity of the soil structure. Compared with the restoration scheme that only relies on chemical methods in the prior art, the present invention can provide a more lasting and efficient restoration effect, avoiding the slow restoration process caused by insufficient microorganisms.

[0021] 4. The present invention effectively promotes the dissolution and conversion of salt in the soil by adjusting the soil pH value. Compared with the prior art, the traditional method lacks the effect of the acidic environment, which leads to a slow salt removal rate and difficulty in maintaining the repair effect. The present invention, by adding organic acids, not only improves the salt conversion efficiency, but also provides more favorable growth conditions for crops, solving the problem of insufficient soil pH adjustment in traditional technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a flow chart of the production method of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0024] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0025] See also Figure 1 The present invention provides a method for producing agricultural salt-alkali elimination, comprising the following steps: S1. Prepare a salt-alkali disinfection formula, the formula comprising: Sulfuric acid 10-20 parts by mass; 5-15 parts by weight of hydrochloric acid; 0.5-2 parts by mass of nano metal catalyst; Microbial community 2-5 parts by weight; 10-20 parts by weight of organic fertilizer; Water 50-60 parts by weight; S2, mixing the above formula evenly to obtain a salt-alkali elimination raw material solution; S3, reacting the obtained salt-alkali dissolving raw material liquid to generate a salt-alkali dissolving finished liquid; S4. Concentrate or dry the obtained salt-alkali disinfectant product liquid to obtain a finished salt-alkali disinfectant product.

[0026] Each step of the method of the present invention is described in detail below.

[0027] Step S1 is the initial step of salt-alkali elimination production, which involves preparing a specific chemical formula. The ingredients in the formula are: Sulfuric acid (10-20 parts by mass) is a strong acid that can effectively adjust the acidity and alkalinity of the solution. In the production process of salt-alkali removal, sulfuric acid participates in chemical reactions, helps degrade alkaline substances in saline-alkali land, and promotes the dissolution and conversion of salt.

[0028] Sulfuric acid is often used in industry and agriculture as an acidity regulator, which can achieve the effect of salt and alkali elimination in a relatively short time.

[0029] Hydrochloric acid (5-15 parts by weight), as a strong acid, can work together with sulfuric acid in the formula to further adjust the pH value of the solution and effectively dissolve salts in the soil (such as sodium chloride).

[0030] Hydrochloric acid can improve reaction efficiency and accelerate the salt conversion process.

[0031] Nano metal catalyst (0.5-2 parts by mass), nano metal catalyst (such as nano titanium, nano copper oxide, etc.) can accelerate chemical reactions in salt-alkali disinfection, especially in the process of promoting the decomposition and conversion of salts. Due to its large surface area and high activity, nano catalysts can significantly increase the reaction rate.

[0032] Nanocatalysts can not only improve reaction efficiency, but also make reactions more thorough, reducing reaction time and resource consumption.

[0033] Microbial communities (2-5 parts by weight) Microbial communities (such as halophilic bacteria, nitrogen-fixing bacteria, etc.) participate in the soil improvement process, help transform the salt in the soil, and have a positive effect on improving the soil structure. They help decompose salt substances and reduce the salt concentration of the soil.

[0034] Microbial communities can naturally promote soil health and enhance the restoration of saline-alkali land. Their application makes saline-alkali land improvement not only rely on chemical methods, but also introduce the advantages of biological restoration.

[0035] Organic fertilizer (10-20 parts by mass): Organic fertilizer (such as humus, compost, etc.) can improve soil structure, increase the organic matter content of the soil, thereby promoting soil permeability and water retention capacity, and supporting the growth of plant roots.

[0036] The use of organic fertilizers provides a source of nutrients for microorganisms and enhances the overall fertility of the soil, helping to restore the soil ecosystem in the long term.

[0037] Water (50-60 parts by mass): Water, as a solvent, can dissolve other chemical components and allow them to fully react in the solution.

[0038] Water is an important medium in chemical reactions, ensuring good dissolution and reaction of other ingredients.

[0039] In step S2, the above components are accurately mixed in proportion to make them uniformly dissolved and form a salt-alkali disinfection raw material solution.

[0040] Mechanical stirring or ultrasonic treatment can be used to ensure that the ingredients are completely dissolved and evenly distributed.

[0041] Stirring or ultrasonic treatment can help accelerate the homogeneity of the reaction and prevent the components from separating or incompletely reacting.

[0042] Step S3 is the core reaction step of the salt-alkali disinfection production. The salt-alkali disinfection raw material liquid undergoes a chemical reaction under certain conditions to generate a liquid with a salt-alkali disinfection repair effect.

[0043] The reaction conditions need to be adjusted according to the properties of the raw materials. The temperature is usually controlled at 25-40°C and the reaction time is 30-90 minutes to ensure that the reaction process is fully carried out.

[0044] Too low a temperature may result in incomplete reaction, while too high a temperature may result in side reactions. Reasonable reaction time ensures that the reactants are fully converted into the effective components of salt-alkali disinfection.

[0045] In step S4, the finished liquid of the saline-alkali fertilizer is converted into the final product form (solid saline-alkali fertilizer).

[0046] Concentration: Concentrate the saline-alkali disinfectant liquid into a higher concentration liquid or solid by evaporating water or using other concentration techniques (such as vacuum concentration).

[0047] Drying: Through spray drying, freeze drying or other drying methods, the salt-alkali disinfectant liquid is converted into solid powder or granular fertilizer for easy storage, transportation and application.

[0048] The formula further comprises 1-3 parts by weight of an organic acid, wherein the organic acid is citric acid, which is used for enhancing solubility and reaction rate.

[0049] In addition to sulfuric acid, hydrochloric acid, nanocatalyst, microbial community, organic fertilizer and water, 1-3 parts by mass of organic acid, specifically citric acid, can be additionally added to enhance solubility and reaction rate.

[0050] Enhance solubility: Citric acid, as a weak acid, can increase the solubility of some insoluble substances by lowering the pH value of the reaction system. In the production process of salt-alkali disinfectant, citric acid can help dissolve some salt-alkali substances (such as certain metal salts) into a form that is easier to react, thereby improving the overall reaction efficiency. It helps the salt-alkali disinfectant generation process to be smoother by forming soluble metal complexes.

[0051] Accelerate the reaction rate: Citric acid not only participates in the reaction as an acidic substance, but also forms a relatively stable complex by combining with the metal ions in the reaction system. These complexes will increase the activity of metal ions in the solution and promote their interaction with other reactants, thereby accelerating the degradation rate of salt and alkali. Especially under the action of catalysts, citric acid can improve the effectiveness of catalysts and enable the reaction to be completed in a shorter time.

[0052] Improve the stability of the solution: The addition of citric acid can also alleviate the risk of corrosion or side reactions caused by excessive acidity to a certain extent. Its weak acidity can adjust the acidity of the reaction environment, prevent the negative impact of excessive acidity on certain components (such as organic fertilizers, microbial communities, etc.), and maintain the stability of the reaction system.

[0053] Promote soil improvement effect: The organic acid properties of citric acid can further promote the removal of salt and alkali in soil remediation. It can reduce the negative impact of metal ions on the soil by complicating the metal ions in salt and alkali, and accelerate their conversion into plant-friendly forms, ultimately helping to improve soil fertility and soil structure.

[0054] By adding citric acid to the formula, not only the rate and efficiency of the salt-alkali disinfection reaction are improved, but also the stability and effect of the finished salt-alkali disinfection in practical applications are improved, providing stronger technical support for agricultural soil remediation.

[0055] Embodiment 1: The specific steps are as follows: 1. Preparation formula: Sulfuric acid: 12 parts by mass; Hydrochloric acid: 12 parts by mass; Nano metal catalyst: 1 part by mass (nano copper oxide is used); Microbial community: 3 parts by mass (mixed halophilic bacteria and nitrogen-fixing bacteria); Organic fertilizer: 14 parts by mass (humus); Water: 62 parts by mass.

[0056] 2. Mixing formula: Use mechanical stirring, control the stirring speed at 300rpm, and the time is 30 minutes. After mixing evenly, obtain the salt-alkali disinfection raw material liquid.

[0057] 3. Reaction: Heat the saline-alkali solution to 30°C and the reaction time is 60 minutes.

[0058] 4. Concentration treatment: The finished liquid is concentrated to 50% of the original liquid concentration by evaporation for 6 hours, and then dried to obtain the final solid saline-alkali solution.

[0059] Embodiment 2: The specific steps are as follows: 1. Preparation formula: Sulfuric acid: 15 parts by mass; Hydrochloric acid: 10 parts by mass; Nano metal catalyst: 1.5 parts by mass (using nano titanium); Microbial community: 4 parts by mass (nitrogen-fixing bacteria); Organic fertilizer: 12 parts by weight (compost); Water: 58 parts by mass.

[0060] 2. Mixing formula: Mix in ultrasonic cleaning equipment at a frequency of 20kHz for 15 minutes.

[0061] 3. Reaction: Heat the mixture to 35°C and continue the reaction for 45 minutes.

[0062] 4. Drying treatment: Use spray drying equipment, set the temperature to 40°C, the atomization pressure to 3MPa, and continue drying for 2 hours to obtain a solid product of salt-alkali disinfectant.

[0063] Embodiment 3: The specific steps are as follows: 1. Preparation formula: Sulfuric acid: 14 parts by mass; Hydrochloric acid: 10 parts by mass; Nano metal catalyst: 0.8 parts by mass (nano titanium oxide); Microbial community: 3.5 parts by mass (halophilic bacteria); Organic fertilizer: 16 parts by mass (compost mixed with humus); Water: 62.7 parts by mass.

[0064] 2. Mixing formula: Add the formula components into the reactor and use a high shear mixer to stir at 4000 rpm for 5 minutes to ensure uniform distribution.

[0065] 3. Reaction: Reaction conditions: temperature 40°C, reaction time 90 minutes, maintain stable stirring.

[0066] 4. Concentration treatment: Use a rotary evaporator to concentrate the salt-alkali disinfectant finished liquid to 1 / 3 of the original volume, and then dry it for 4 hours to finally obtain the dried salt-alkali disinfectant solid fertilizer.

[0067] Embodiment 4: The specific steps are as follows: 1. Preparation formula: Sulfuric acid: 20 parts by mass; Hydrochloric acid: 10 parts by mass; Nano metal catalyst: 1 part by mass (nano titanium); Microbial community: 2 parts by mass (nitrogen-fixing bacteria); Organic fertilizer: 15 parts by mass (compost mixed with humus); Water: 52 parts by mass; Organic acid: 1.5 parts by mass (citric acid).

[0068] 2. Mixing formula: Add all ingredients into the reaction vessel and stir at 200 rpm for 15 minutes using a mechanical stirrer.

[0069] 3. Reaction: The reaction temperature was set at 30°C and the reaction time was 60 minutes.

[0070] 4. Drying treatment: The salt-alkali disinfectant liquid is treated by freeze-drying method, the temperature is controlled at -30°C, and the drying is continued for 48 hours to obtain the final salt-alkali disinfectant solid fertilizer.

[0071] Embodiment 5: The specific steps are as follows: 1. Preparation formula: Sulfuric acid: 10 parts by mass; Hydrochloric acid: 10 parts by mass; Nano metal catalyst: 1.2 parts by mass (nano titanium); Microbial community: 3 parts by mass (mixture of halophilic bacteria and nitrogen-fixing bacteria); Organic fertilizer: 12 parts by mass (compost mixed with humus); Water: 63 parts by mass.

[0072] 2. Mixing formula: Use ultrasonic equipment with a frequency of 25kHz for 20 minutes to mix.

[0073] 3. Reaction: Heat the saline-alkali solution to 33°C in a reactor, maintain the temperature and react for 60 minutes.

[0074] 4. Drying treatment: Use freeze drying method at -30℃ for 6 hours.

[0075] Comparative Example 1: Based on Example 1, the ratio of sulfuric acid to hydrochloric acid was slightly adjusted, using a 2:1 ratio instead of the original 1.5:1 ratio.

[0076] Sulfuric acid: 12 parts by mass; Hydrochloric acid: 6 parts by mass; Other components: the same as in Example 1.

[0077] Comparative Example 1 Preparation Process: 1. Preparation formula: Prepare the formula according to the above proportions, ensuring that the ratio of sulfuric acid to hydrochloric acid is 2:1.

[0078] 2. Mixing: Use a high-speed stirrer with the stirring speed set at 300 rpm for 30 minutes.

[0079] 3. Reaction: Heat the mixture to 30°C and continue the reaction for 60 minutes.

[0080] 4. Concentration treatment: The finished liquid is concentrated to 50% of the original liquid concentration by evaporation for 6 hours, and then dried to obtain the final solid saline-alkali solution.

[0081] Comparative Example 2: Based on Example 2, the catalyst was replaced with nano copper, and its concentration was increased to 2 parts by mass, and compared with the nano titanium used in the example.

[0082] Sulfuric acid: 15 parts by mass; Hydrochloric acid: 10 parts by mass; Nano metal catalyst: 2 parts by mass (using nano copper); Other components: the same as in Example 2.

[0083] Comparative Example Preparation Process: 1. Formula preparation: Prepare the formula according to the above ratio, replace nano titanium with nano copper, and adjust the concentration to 2 parts by mass.

[0084] 2. Mixing: Use ultrasonic cleaning equipment at a frequency of 20kHz for 15 minutes.

[0085] 3. Reaction: Heat the mixture to 35°C and continue the reaction for 45 minutes.

[0086] 4. Drying treatment: Use spray drying equipment, set the temperature to 40°C, the atomization pressure to 3MPa, and continue drying for 2 hours.

[0087] Comparative Example 3: Based on Example 3, the microbial community is removed (no microorganisms are used), and the reaction is carried out only by relying on the catalyst.

[0088] Sulfuric acid: 14 parts by mass; Hydrochloric acid: 10 parts by mass; Nano metal catalyst: 0.8 parts by mass (nano titanium oxide); Organic fertilizer: 16 parts by mass (compost mixed with humus); Water: 62.7 parts by mass; Removes microbial flora.

[0089] Comparative Example Preparation Process: 1. Formula preparation: Prepare the formula as per the above ratio, remove the microbial flora and ensure that only chemical catalysts are used.

[0090] 2. Mixing: Use a high shear mixer at 4000 rpm for 5 minutes to ensure uniform distribution.

[0091] 3. Reaction: Reaction conditions: temperature 40°C, reaction time 90 minutes, maintain stable stirring.

[0092] 4. Concentration treatment: Use a rotary evaporator to concentrate the salt-alkali disinfectant finished liquid to 1 / 3 of the original volume, and then dry it for 4 hours to finally obtain the dried salt-alkali disinfectant solid fertilizer.

[0093] Comparative Example 4: Based on Example 4, no organic acid (such as citric acid) was added, and the reaction temperature and reaction time were slightly adjusted.

[0094] Sulfuric acid: 20 parts by mass; Hydrochloric acid: 10 parts by mass; Nano metal catalyst: 1 part by mass (nano titanium); Microbial community: 2 parts by mass (nitrogen-fixing bacteria); Organic fertilizer: 15 parts by mass (compost mixed with humus); Water: 52 parts by mass; No organic acids added.

[0095] Comparative Example Preparation Process: 1. Formula preparation: Prepare the formula according to the above proportions, remove organic acids, and ensure that only acidic ingredients and organic fertilizers are used.

[0096] 2. Mixing: Add all ingredients into the reaction vessel and stir at 200 rpm for 15 minutes using a mechanical stirrer.

[0097] 3. Reaction: The reaction temperature was set at 28°C and the reaction time was 90 minutes.

[0098] 4. Drying treatment: The saline-alkali liquid is treated by freeze-drying method, with the temperature controlled at -30℃ for 48 hours.

[0099] Experiment 1: The effects of sulfuric acid and hydrochloric acid ratios of 1:1 and 2:1 on the improvement of different types of saline-alkali land (mild, moderate and severe saline-alkali land) were compared, especially the changes in salinity, the adjustment of pH value and the improvement of crop growth.

[0100] Experimental design: Experimental groups: Experimental group (Example 1): A salt-alkali disinfection formula with sulfuric acid and hydrochloric acid in a ratio of 1:1 and other ingredients being the same as those in Example 1 was used.

[0101] Control group (Comparative Example 1): a salt-alkali disinfection formula with sulfuric acid and hydrochloric acid in a ratio of 2:1 and other ingredients being the same as those in Comparative Example 1 was used.

[0102] Subjects: Slightly saline soil (pH: 8.5, salt: 0.2%); Moderately saline soil (pH: 9.0, salt: 0.5%); Severely saline-alkali land (pH: 9.5, salt: 0.8%).

[0103] Experimental steps: Formulation preparation and application: According to the ratio of sulfuric acid to hydrochloric acid (1:1 and 2:1) used in the experimental group (Example) and the control group (Comparative Example), other components were the same, and a salt-alkali disinfection formula was prepared.

[0104] After the salt-alkali disinfectant was prepared, it was applied to different types of saline-alkali land to ensure sufficient coverage of the experimental area (10 square meters of soil area per group).

[0105] Reaction conditions: Mild saline-alkali land: reaction temperature is 30°C and reaction time is 30 minutes; Moderate saline-alkali land: reaction temperature is 35°C and reaction time is 30 minutes; Severely saline-alkali land: reaction temperature is 40°C and reaction time is 60 minutes.

[0106] Experimental period: The experimental period is 2 months, and data is recorded once a week to analyze salt content, pH value, and crop growth.

[0107] Data Records: Soil salt concentration: Soil salt concentration was measured weekly using soil sampling and analysis equipment; Soil pH: Measure the changes in soil pH every week and record the improvement in soil pH; Crop growth: measure crop growth height, leaf area and other indicators every week, and record crop growth status; Soil organic matter content: Regularly measure the amount of organic matter in the soil to assess improvements in soil structure.

[0108] Experimental data: Table 1: Experimental data on the improvement effect of sulfuric acid to hydrochloric acid ratio on different types of saline-alkali land Through this experiment, the data showed that the formula with a ratio of sulfuric acid to hydrochloric acid of 1:1 and 2:1 can significantly improve the salinity and pH value of different types of saline-alkali land. As the experiment progressed, the 1:1 ratio had a more rapid effect on mild saline-alkali land, while the 2:1 ratio showed a more balanced effect on moderate and severe saline-alkali land. The experimental results show that the formula with a ratio of sulfuric acid to hydrochloric acid of 1:1 to 2:1 can effectively improve saline-alkali land, providing the possibility of repairing severe saline-alkali land and converting it into fertile farmland.

[0109] Experiment 2: The purpose of this experiment is to study the effect of replacing nano-titanium catalyst (concentration of 1.5 parts by mass) with nano-copper catalyst (concentration of 2 parts by mass), focusing on its improvement effect on different types of saline-alkali land (mild, moderate, and severe saline-alkali land), especially the changes in salt content, adjustment of pH value, and improvement of crop growth.

[0110] Experimental design: Experimental groups: Experimental group (Example 2): The catalyst is nano-titanium, the concentration is 1.5 parts by mass, and the other ingredients are the same as those of Example 2.

[0111] Control group (Comparative Example 2): The catalyst is nano copper, the concentration is 2 parts by mass, and the other formula ingredients are the same as those of Comparative Example 2.

[0112] Subjects: Mild saline-alkali land (pH: 8.5, salt content: 0.2%) Moderately saline-alkali land (pH: 9.0, salinity: 0.5%) Severe saline-alkali land (pH: 9.5, salt content: 0.8%) Experimental steps: Formulation preparation and application: Prepare the salt-alkali elimination formula according to the design of the experimental and control groups.

[0113] Experimental group: using nano-titanium catalyst (concentration 1.5 parts by mass) and the same salt-alkali disinfection formula as other components; Control group: using nano copper catalyst (concentration 2 parts by weight) and the same salt-alkali disinfection formula with other components.

[0114] After the salt-alkali disinfectant was prepared, it was applied to different types of saline-alkali land to ensure that the experimental area was covered (10 square meters of soil per group).

[0115] Reaction conditions: Mild saline-alkali land: the reaction temperature is set to 30°C and the reaction time is 30 minutes; Moderate saline-alkali land: the reaction temperature is set at 35°C and the reaction time is 30 minutes; Severely saline-alkali land: The reaction temperature is set to 40°C and the reaction time is 60 minutes.

[0116] Experimental period: The experimental period is 2 months, and data is recorded once a week, including soil salinity, pH value, crop growth, etc.

[0117] Data Records: Soil salt concentration: Take samples weekly and analyze changes in soil salinity; Soil pH: Measure soil pH changes weekly; Crop growth: record crop growth height, leaf area, root development and other indicators; Soil organic matter content: Regularly measure changes in soil organic matter to assess improvements in soil structure.

[0118] Experimental data: Table 2: Experimental data on the improvement effects of nano copper catalyst and nano titanium catalyst on different types of saline-alkali land During the experiment, a formula using nano copper catalyst (concentration of 2 parts by mass) was compared with a formula using nano titanium catalyst (concentration of 1.5 parts by mass). The data showed that the nano copper catalyst showed a stronger effect in improving soil salinity, adjusting pH value and promoting crop growth, especially in severely saline-alkali land, where soil salt removal was faster and crop growth recovery was more significant. In contrast, although the effect of nano titanium catalyst can also improve soil conditions, its effect of removing salt is relatively slow, especially in severely saline-alkali land.

[0119] From a mechanistic point of view, the addition of nano-copper catalysts improves the redox capacity of the reaction, allowing salt substances in the soil to dissolve more quickly and convert into absorbable nutrients, reducing the salt burden of the soil. In this process, nano-copper catalysts promote the conversion of salts in acidic environments, allowing plant roots to grow in a more suitable environment. The catalytic activity of nano-titanium catalysts is relatively low, resulting in slower salt removal efficiency, and in soils with higher salinity, the effect is relatively less significant than nano-copper.

[0120] Through the data of this experiment, it can be seen that the salt-alkali elimination formula using nano-copper catalyst can not only significantly increase the speed of soil repair, but also provide a faster solution for saline-alkali land improvement. Especially in the process of repairing severe saline-alkali land, the advantages of nano-copper catalyst are more obvious, which can effectively improve soil quality and provide a more feasible solution for agricultural planting.

[0121] Experiment 3: In studying the improvement effect of saline-alkali land after removing the microbial community, the focus is on the impact of the reaction on saline-alkali land by catalyst alone (without using microbial community). The experiment explores the synergistic effect of microbial community and catalyst on saline-alkali land restoration by comparing the differences in salt removal, soil pH adjustment and crop growth between the formula after removing the microbial community and the formula before using the microbial community.

[0122] Experimental design: Experimental groups: Experimental group (Example 3): using microbial communities (3.5 parts by mass, halophilic bacteria) and nano-titanium catalyst (concentration of 0.8 parts by mass), the other formula ingredients are the same as those of Example 3.

[0123] Control group (Comparative Example 3): The microbial community was removed only by nano-titanium catalyst (concentration of 0.8 parts by mass), and the other formula ingredients were the same as those of Comparative Example 3.

[0124] Subjects: Slightly saline soil (pH: 8.5, salt: 0.2%); Moderately saline soil (pH: 9.0, salt: 0.5%); Severely saline-alkali land (pH: 9.5, salt: 0.8%).

[0125] Experimental steps: Formulation preparation and application: According to the design of the experimental group and the control group, prepare the salt-alkali elimination formula: Experimental group: Halophilic bacteria (3.5 parts by mass) and nano-titanium catalyst (concentration 0.8 parts by mass) were used, and other ingredients were the same; Control group: The microbial community was removed and only nano-titanium catalyst (concentration 0.8 parts by mass) was used, with other formula ingredients being the same.

[0126] After the salt-alkali disinfectant was prepared, it was applied to different types of saline-alkali land to ensure uniform coverage of the experimental area (10 square meters of soil per group).

[0127] Record application rates and preliminary soil conditions.

[0128] Reaction conditions: Mild saline-alkali land: The reaction temperature is set at 30°C and the reaction time is 30 minutes.

[0129] Moderately saline-alkali land: The reaction temperature is set at 35°C and the reaction time is 30 minutes.

[0130] Severely saline-alkali land: The reaction temperature is set to 40°C and the reaction time is 60 minutes.

[0131] Experimental period: The experimental period is 2 months, and data is recorded once a week, including salt changes, pH adjustment, crop growth, etc.

[0132] Data Records: Soil salt concentration: Take samples weekly and analyze changes in soil salinity; Soil pH: Measure changes in soil pH weekly and record improvements in pH; Crop growth status: record the growth status of crops such as height, leaf area, root development, etc. Soil organic matter content: Regularly measure changes in soil organic matter to assess improvements in soil structure.

[0133] Experimental data: Table 3: Experimental data on saline-alkali land improvement by removing microbial communities and using microbial communities The experimental results show that after removing the microbial community, the speed of soil salt removal and the improvement of crop growth slowed down compared with the control group using the microbial community. Specifically, in the formula using the microbial community, the activity of microorganisms helps to decompose harmful salts in the soil faster, thereby accelerating soil recovery and significantly accelerating crop growth. In the experimental group after removing the microbial community, although the nano-titanium catalyst is still used for the reaction, the removal of salt and the recovery of crops appear to be slow due to the lack of synergistic action of microorganisms.

[0134] From a mechanistic analysis, microbial communities (especially halophilic bacteria) play an important role in the restoration of saline-alkali land. They not only reduce soil salinity by biodegrading salts and organic matter, but also change the soil environment through their metabolic activities and promote the healthy growth of plant roots. Catalysts mainly play the role of accelerating salt conversion. Although they have a certain effect in removing salt, they lack the auxiliary role of microorganisms when relying solely on catalysts, resulting in a slow reaction rate.

[0135] In summary, the dual effects of microbial communities and catalysts can more effectively improve saline-alkali land, especially in salt removal and soil restoration, showing the importance of microorganisms in saline-alkali land remediation.

[0136] Experiment 4: The improvement effect of saline-alkali land after removing organic acids (such as citric acid) was studied, and the reaction temperature and reaction time were fine-tuned. By comparing the addition of citric acid with the addition of organic acids, the differences in salt removal, soil pH adjustment and crop growth were analyzed.

[0137] Experimental design: Experimental groups: Experimental group (Example 4): citric acid (1.5 parts by mass) was added to the formula, and the other ingredients were the same as those in Example 4.

[0138] Control group (Comparative Example 4): The organic acid (such as citric acid) was removed, and the other components were the same as those in Comparative Example 4.

[0139] Subjects: Slightly saline soil (pH: 8.5, salt: 0.2%); Moderately saline soil (pH: 9.0, salt: 0.5%); Severely saline-alkali land (pH: 9.5, salt: 0.8%).

[0140] Experimental steps: Formulation preparation and application: According to the design of the experimental group and the control group, prepare the salt-alkali elimination formula: Experimental group: citric acid (1.5 parts by mass) was added to the formula, and the other components were the same as those in Example 4; Control group: citric acid was removed, and other formula ingredients were the same as those of Comparative Example 4.

[0141] After the salt-alkali disinfectant is produced, it is applied to different types of saline-alkali lands, ensuring that the area of ​​each group of soil is 10 square meters.

[0142] Reaction conditions: Mild saline-alkali land: the reaction temperature is set to 30°C and the reaction time is 30 minutes; Moderate saline-alkali land: the reaction temperature is set at 35°C and the reaction time is 30 minutes; Severely saline-alkali land: The reaction temperature is set to 40°C and the reaction time is 60 minutes.

[0143] Experimental period: The experimental period is 2 months, and data is recorded once a week, covering salt changes, pH adjustment and crop growth.

[0144] Data Records: Soil salt concentration: Take samples weekly and analyze changes in soil salinity; Soil pH: Measure the changes in soil pH every week and record the changes in acidity and alkalinity; Crop growth status: record the growth status of crops such as height, leaf area, root development, etc. Soil organic matter content: Regularly measure changes in soil organic matter to assess improvements in soil structure Experimental data: Table 4: Experimental data on the improvement effect of saline-alkali land by removing organic acids and adding citric acid This experiment compared the two formulas of removing organic acids and adding citric acid, and found that the role of organic acids in saline-alkali land improvement cannot be underestimated. The experimental results show that after removing organic acids, the salt removal rate slowed down significantly, especially in severe saline-alkali land, the salt removal effect was not as good as the control group with citric acid added. Even in mild saline-alkali land, after removing organic acids, the recovery rate of crops was relatively slow, and the improvement of soil salinity was not as significant as the effect of adding citric acid.

[0145] From the mechanism analysis, citric acid, as an organic acid, can provide an acidic environment, promote the dissolution of salt substances, make them more easily converted into a dissolved state, and thus effectively reduce the accumulation of salt in the soil. This effect plays a key role in increasing the speed of soil repair. In the absence of organic acid, although the nano-titanium catalyst can still promote the conversion of salt, the removal efficiency of salt in the soil is significantly reduced due to the lack of an acidic environment, resulting in limited crop growth.

[0146] This experiment shows that in the process of saline-alkali land restoration, the role of organic acids is not limited to providing an acidic environment and helping salt conversion, but also has an important impact on improving soil structure and promoting crop growth. Therefore, in large-scale saline-alkali land restoration, appropriate addition of organic acids will help accelerate soil recovery, especially for the restoration of high-salinity soils.

[0147] 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 method for producing agricultural salt-alkali removal, characterized in that: The following steps are involved: S1. Prepare a salt-alkali disinfection formula, the formula comprising: Sulfuric acid 10-20 parts by mass; 5-15 parts by weight of hydrochloric acid; 0.5-2 parts by mass of nano metal catalyst; Microbial community 2-5 parts by weight; 10-20 parts by weight of organic fertilizer; Water 50-60 parts by weight; S2, mixing the above formula evenly to obtain a salt-alkali elimination raw material solution; S3, reacting the obtained salt-alkali dissolving raw material liquid to generate a salt-alkali dissolving finished liquid; S4. Concentrate or dry the obtained salt-alkali disinfectant product liquid to obtain a finished salt-alkali disinfectant product.

2. The agricultural salt-alkali elimination production method according to claim 1, characterized in that: The mass ratio of the sulfuric acid to the hydrochloric acid is 1:1-2:

1.

3. The agricultural salt-alkali elimination production method according to claim 1, characterized in that: The nano metal catalyst is nano titanium, nano copper oxide, or a mixture of nano titanium and nano copper oxide.

4. The agricultural salt-alkali elimination production method according to claim 1, characterized in that: The microbial community is a halophilic bacteria community, a nitrogen-fixing bacteria community, or a mixture of a halophilic bacteria community and a nitrogen-fixing bacteria community.

5. The agricultural salt-alkali elimination production method according to claim 1, characterized in that: The organic fertilizer is humus, compost, or a mixture of humus and compost.

6. The agricultural salt-alkali elimination production method according to claim 1, characterized in that: The salt-alkali disinfection formula is used to completely dissolve and evenly mix the components by mechanical stirring or ultrasonic treatment.

7. The agricultural salt-alkali elimination production method according to claim 1, characterized in that: The temperature in the salt-alkali elimination raw material liquid reaction step is controlled between 25-40° C. and the reaction time is 30-90 minutes.

8. The agricultural salt-alkali removal production method according to claim 1, characterized in that: The formula further comprises 1-3 parts by mass of an organic acid, wherein the organic acid is citric acid, which is used to enhance solubility and reaction rate.

9. A salt-alkali disinfectant produced according to the agricultural salt-alkali disinfectant production method according to any one of claims 1 to 7.

10. Use of the salt-alkali elimination method according to claim 9 in the restoration of saline-alkali land.

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