Water-soluble organic suspended silicon liquid fertilizer and preparation method thereof

Abstract

The present application relates to the technical field of agricultural liquid fertilizer, and specifically relates to a water-soluble organic suspended silicon liquid fertilizer, which is composed of a silicon source, a compounded organic carrier, a composite dispersion stabilizer, a defoaming agent and water; the compounded organic carrier comprises humic acid and amino acid; the composite dispersion stabilizer comprises sodium lignosulfonate and xanthan gum; the silicon source comprises potassium silicate; the weight of each component is as follows: potassium silicate 6-12 parts, humic acid 3-5 parts, amino acid 2-3 parts, sodium lignosulfonate 0.8-1.5 parts, xanthan gum 0.3-0.5 parts, defoaming agent 0.08-0.12 parts, and water is supplemented to 100 parts. The present application is designed in cooperation with the compounded organic carrier and the composite dispersion stabilizer, the organic carrier and the silicon source form a stable complex structure, the composite dispersion stabilizer inhibits the agglomeration of silicon particles through component cooperation, and a low-temperature aging process is matched, so that the suspension stability of the product is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural liquid fertilizer technology, specifically to a water-soluble organic suspended silica liquid fertilizer and its preparation method. Background Technology

[0002] Silicon, an essential element for crop growth and development, plays a crucial role in enhancing crop resistance to lodging, pests, and diseases, as well as improving yield and quality. Liquid silicon fertilizer, due to its convenient application and high absorption efficiency, has become one of the most widely used fertilizer types in agricultural production.

[0003] However, existing liquid silicon fertilizers still face many technical challenges. Traditional liquid silicon fertilizers often employ a single organic carrier or a design without an organic carrier, making it difficult to form a stable complex structure with the silicon source. This leads to easy aggregation of silicon particles, resulting in stratification and precipitation during storage, severely impacting product stability. Regarding the dispersion system, existing products mostly rely on a single dispersant, lacking synergistic effects between components. Under extreme storage conditions such as high and low temperatures, stability significantly degrades, further limiting the product's storage period and application range. In terms of silicon source selection, existing technologies often use a single inorganic silicon source, which has weak resistance to hard water. In hard water containing high levels of calcium and magnesium ions, it easily reacts to form insoluble substances, reducing fertilizer effectiveness and resulting in poor water quality compatibility.

[0004] The preparation process lacks systematic optimization, and mostly adopts room temperature mixing and single feeding methods. It does not form key process links such as gradient emulsification and low temperature aging, resulting in uneven integration of various components, low effective silicon release rate, and significant fertilizer effect decay after long-term storage.

[0005] Furthermore, the development of high-concentration liquid silicon fertilizers faces bottlenecks. A single silicon source lacks system compatibility under high-concentration conditions, easily leading to severe aggregation and hindering stable mass production. This fails to meet the demands of large-scale agricultural production for products with high fertilizer efficiency and high stability. These technical deficiencies collectively limit the application effectiveness of existing liquid silicon fertilizers, necessitating the development of a water-soluble organic suspension silicon liquid fertilizer that combines excellent stability, water solubility, hard water resistance, and long-lasting fertilizer effect. Summary of the Invention

[0006] The primary objective of this invention is to provide a water-soluble organic suspended silica liquid fertilizer and its preparation method.

[0007] A further objective of this invention is to provide a water-soluble organic suspended silica liquid fertilizer, comprising a silica source, a compound organic carrier, a compound dispersing stabilizer, an antifoaming agent, and water; wherein the compound organic carrier comprises humic acid and amino acids; the compound dispersing stabilizer comprises sodium lignosulfonate and xanthan gum; the silica source comprises potassium silicate; and the weight of each component is as follows: potassium silicate 6-12 parts, humic acid 3-5 parts, amino acids 2-3 parts, sodium lignosulfonate 0.8-1.5 parts, xanthan gum 0.3-0.5 parts, antifoaming agent 0.08-0.12 parts, and water to a total of 100 parts.

[0008] Preferably, the compounded organic carrier further comprises seaweed extract, wherein the seaweed extract weighs 3-4 parts.

[0009] Preferably, the silicon source further comprises polyether-modified siloxane, wherein the weight of the polyether-modified siloxane is 3-4 parts.

[0010] Preferably, the composite dispersion stabilizer further comprises guar gum, wherein the weight of the guar gum is 0.1-0.2 parts.

[0011] Preferably, the amino acid is a mixture of alanine, glutamic acid and glycine, or a mixture of alanine, glutamic acid and aspartic acid.

[0012] Preferably, the seaweed extract is obtained by enzymatic hydrolysis of sodium alginate.

[0013] Preferably, it also contains a preservative, said preservative being potassium sorbate, in the form of 0.05 parts by weight.

[0014] A method for preparing a water-soluble organic suspended silica liquid fertilizer as described in any one of claims 1 to 7, comprising the following steps:

[0015] (1) Raw material pretreatment: Humic acid is added to part of the water, heated and stirred until completely dissolved to obtain humic acid aqueous solution; sodium lignosulfonate and xanthan gum are mixed, added to part of the water, and stirred at room temperature to form a colloidal dispersion;

[0016] (2) Mixing and emulsification: Potassium silicate is slowly added to humic acid aqueous solution while stirring and heating. After stirring, amino acids are added and stirring is continued to form a primary mixture.

[0017] (3) Dispersion stability: Slowly inject the colloidal dispersion into the primary mixture, adjust the speed and keep it warm while stirring, and add the defoamer in two batches during the process;

[0018] (4) Low-temperature aging: Cool the mixture obtained in step (3) to 20-25℃, seal and let it stand for aging, stirring intermittently during the process;

[0019] (5) Filtration and packaging: The aged mixture is filtered and packaged to obtain the finished product.

[0020] Preferably, in step (1), the heating temperature for dissolving humic acid is 45-50℃, the stirring speed is 800-1000r / min, the stirring speed for the colloidal dispersion is 600r / min, and the stirring time is 20 minutes.

[0021] Preferably, in step (2), the temperature is raised to 50°C and the stirring speed is 1000-1200 r / min; in step (3), the stirring speed is 1200-1300 r / min, the holding temperature is 50°C, and the stirring time is 90-120 minutes; in step (4), the aging time is 4-6 hours, the time interval between stirring is 40-60 minutes, and the stirring speed is 300 r / min.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention employs a synergistic design of a compounded organic carrier and a composite dispersant stabilizer. The organic carrier forms a stable complex structure with the silicon source, while the composite dispersant stabilizer inhibits silicon particle agglomeration through synergistic component action. Combined with a low-temperature aging process, this significantly improves the product's suspension stability. The product maintains good condition under various storage conditions, including room temperature, high temperature, and low temperature, without significant stratification or sedimentation, significantly extending the storage period and ensuring the product's reliability in different environments.

[0024] 2. Through the innovative design of the composite silicon source and the synergistic effect of the organic carrier, this invention not only has excellent solubility in deionized water, but also maintains high water solubility in hard water, avoiding the problem of reduced effectiveness due to differences in water quality, expanding the applicable geographical area and water quality range of the product, and improving the ease of application.

[0025] 3. This invention combines an organic carrier with an optimized preparation process to synergistically promote silicon source dissociation, while stabilizing the effective silicon form, reducing the loss of effective components during storage, and ensuring the product maintains high fertilizer efficiency over the long term. The product of this invention has a higher silicon release rate and exhibits less degradation after long-term storage, continuously providing crops with sufficient silicon nutrition.

[0026] 4. The product of this invention can efficiently promote the absorption of silicon by crops, significantly improve the toughness of crop stems, reduce lodging rate, and at the same time improve crop yield and quality. It has good application effects on a variety of crops such as rice and wheat.

[0027] 5. In addition, by optimizing the raw material ratio and improving the process, this invention improves product performance while reducing production costs. Moreover, the high-concentration formula can achieve stable mass production, meet the needs of large-scale agricultural production, and has broad market application prospects. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] This embodiment constructs a basic synergistic system, focusing on optimizing the combined effect of organic carrier and dispersant stabilizer. An organic synergistic carrier is formed by combining humic acid and amino acids, and this is paired with a composite dispersion and stabilization system of sodium lignosulfonate and xanthan gum. Combined with gradient emulsification and low-temperature aging processes, this addresses the stability issues caused by existing single carriers and dispersants, providing a technical benchmark for subsequent optimization and verifying the basic synergistic stabilizing effect of the organic carrier and dispersant. The organic carrier can form a stable complex structure with the silicon source, improving the water solubility and suspension stability of silicon, while the composite dispersant stabilizer can inhibit silicon particle agglomeration through component synergy, ensuring system stability.

[0031] (1) Raw material composition: 8 kg potassium silicate, 5 kg humic acid, 3 kg L-amino acid mixture, 1.2 kg sodium lignosulfonate, 0.3 kg xanthan gum, 0.1 kg defoamer polyether modified siloxane, and deionized water to make up to 100 kg. The L-amino acid mixture is composed of alanine, glutamic acid, and glycine in a ratio of 2:1:1 to ensure complexation compatibility with silicon source and humic acid. Among them, the purity of potassium silicate is not less than 98%, the humic acid is mineral-derived humic acid with an organic matter content of not less than 70%, and the sodium lignosulfonate is industrial grade with a sulfonation degree of not less than 85%.

[0032] (2) Preparation process:

[0033] The first step is raw material pretreatment. Humic acid is added to 20 kg of deionized water, heated to 45°C at a rate of 2°C / min, and stirred at 800 r / min for 30 minutes until completely dissolved to obtain a homogeneous humic acid aqueous solution. Sodium lignosulfonate and xanthan gum are mixed, 5 kg of deionized water is added, and the mixture is stirred at 600 r / min at room temperature for 20 minutes to form a uniform colloidal dispersion, thus avoiding the problem of uneven dissolution of a single dispersant.

[0034] The second step involves mixing and emulsifying. Potassium silicate is slowly added to the humic acid aqueous solution at a rate of 0.5 kg / min while stirring. The temperature is increased to 50°C while maintaining a speed of 1000 r / min. The mixture is stirred for 60 minutes to allow the silicon source and humic acid to fully complex. Then, an L-amino acid mixture is added and stirring is continued for 30 minutes to form a primary mixture. Gradual heating and stepwise addition ensure that the components are fully integrated.

[0035] The third step is dispersion and stabilization. The colloidal dispersion is slowly injected into the primary mixture at a rate of 1 kg / min. The rotation speed is adjusted to 1200 r / min, and the mixture is kept at 50°C and stirred for 90 minutes. During the process, the defoamer is added twice, 0.05 kg each time, with an interval of 30 minutes. The foam height is controlled to not exceed one-tenth of the container volume to prevent the foam from affecting the homogeneity of the system.

[0036] The fourth step is low-temperature aging. The mixture is cooled to 25°C at a rate of 1°C / min, sealed, and allowed to stand for 4 hours. During this period, it is stirred at 300 rpm for 10 minutes every 60 minutes to break up potential agglomerates and stabilize the complex structure and dispersion system. The fifth step is filtration and packaging. The mixture is filtered through a 100-mesh filter to remove a small amount of insoluble impurities at a filtration pressure of 0.1 MPa. After packaging, it is stored in a cool place at a temperature of 15°C-25°C.

[0037] This embodiment utilizes the basic synergy of humic acid and amino acid composite carriers and sodium lignosulfonate and xanthan gum composite dispersant, combined with a gradient adaptation process, to initially improve the stability defects of existing single-component systems.

[0038] Example 2:

[0039] Based on the stable system of Example 1, and addressing the issues of its single organic carrier, limited synergistic effect, and high amino acid content, the organic carrier combination was optimized. Seaweed extract and humic acid were combined to replace some amino acids, utilizing the highly active sites of seaweed polysaccharides to enhance the complexation ability with silicon sources, while simultaneously improving crop absorption efficiency and perfecting the carrier's synergistic effect. The combination of seaweed extract and humic acid can form a synergistic effect with amino acids, further stabilizing the silicon source form. This reduces costs while ensuring the effective silicon retention rate. The relevant raw material ratios and mechanisms of action are disclosed in detail to avoid insufficient disclosure.

[0040] (1) Raw material composition: 9 kg potassium silicate, 3 kg humic acid, 4 kg seaweed extract, 2 kg L-amino acid mixture, 1.0 kg sodium lignosulfonate, 0.4 kg xanthan gum, 0.1 kg defoamer polyether modified siloxane, and deionized water to a final volume of 100 kg. The seaweed extract is obtained by enzymatic hydrolysis of sodium alginate. The cellulase activity used for hydrolysis is 5000 U / g, the hydrolysis temperature is 50℃, and the hydrolysis time is 2 hours to improve water solubility and the content of active ingredients. The L-amino acid mixture is adjusted to a mixture of alanine, glutamic acid, and aspartic acid in a ratio of 3:1:1 to enhance the synergistic complexation effect with seaweed polysaccharides. The purity and grade of the raw materials are the same as in Example 1, and the content of algal polysaccharides in the seaweed extract is not less than 30%.

[0041] (2) Preparation process: The dissolution method of seaweed extract was optimized in the raw material pretreatment stage. The seaweed extract was added to 15kg of deionized water, heated to 55℃ at a heating rate of 2℃ / min, and stirred at 900r / min for 40 minutes. 0.05kg of citric acid was added to adjust the pH of the system to 5.5 with a pH adjustment accuracy of ±0.1, so as to fully release the active ingredients in the seaweed extract and ensure its synergistic complexation effect with silicon source and humic acid.

[0042] The pretreatment method for humic acid and dispersant stabilizer is the same as in Example 1 to ensure process continuity. During the mixing and emulsification stage, the order of addition is adjusted. First, potassium silicate and seaweed extract aqueous solution are mixed and stirred for 40 minutes at a stirring speed of 1000 r / min to initially complex the silicon source using the highly active sites of seaweed polysaccharides. Then, humic acid aqueous solution and L-amino acid mixture are added, and stirring continues for 30 minutes. By adjusting the order of addition, the compatibility of each component is enhanced. Subsequent dispersion stabilization, low-temperature aging, and filtration and packaging steps are consistent with those in Example 1.

[0043] In this embodiment, the effective silicon retention rate is improved compared to Example 1 by reducing the amount of amino acids through the synergistic complexation of seaweed polysaccharides and humic acid.

[0044] Example 3:

[0045] Based on the organic carrier synergistic system of Example 2, addressing the issues of weak hard water resistance and limited water quality adaptability of a single silicon source, an organosilicon derivative is introduced to construct an inorganic-organic composite silicon source. The inorganic silicon source ensures silicon content, while the organosilicon derivative enhances hard water resistance and component compatibility. Combined with a xanthan gum and guar gum compounded as a dispersant and stabilizer, the system's hard water resistance and component compatibility are further strengthened, broadening the product's applicable water quality range. The composite silicon source, combined with the organic carrier and composite dispersant and stabilizer, creates a synergistic effect, improving both water solubility and suspension stability while adapting to different water quality environments. All relevant technical details are disclosed in detail to ensure that those skilled in the art can replicate the system.

[0046] (1) Raw material composition: 6 kg potassium silicate, 3 kg polyether-modified siloxane, 3 kg humic acid, 4 kg seaweed extract, 2 kg L-amino acid mixture, 0.8 kg sodium lignosulfonate, 0.3 kg xanthan gum, 0.1 kg guar gum, 0.08 kg polyether-modified siloxane defoamer, and deionized water to make up to 100 kg. The polyether-modified siloxane has a silicon content of not less than 30% and an ethylene oxide addition number of 10-15 to ensure compatibility with inorganic silicon sources and resistance to hard water; the L-amino acid mixture is formulated in the same proportion as in Example 2 to maintain the carrier complexation efficiency. The guar gum is industrial grade with a viscosity of 5000-8000 mPa·s, and the purity and grade of the other raw materials are the same as in Example 1.

[0047] (2) Preparation process: The silicon source dispersion method is optimized in the mixing and emulsification stage. First, the polyether modified siloxane is mixed with 5 kg of deionized water and heated to 40°C at a speed of 1500 r / min and a heating rate of 2°C / min. After stirring for 20 minutes, a uniform siloxane dispersion is formed to avoid agglomeration caused by direct mixing of organosilicon and inorganic silicon. Then, potassium silicate is added and stirred for 30 minutes at a stirring speed of 1200 r / min to fully integrate the two silicon sources. The synergistic effect of inorganic silicon and organosilicon is used to improve the hard water resistance. Subsequently, seaweed extract aqueous solution, humic acid aqueous solution and L-amino acid mixture are added in sequence to continue the advantages of the carrier complexation system.

[0048] In the dispersion and stabilization stage, a mixed solution of sodium lignosulfonate, xanthan gum, and guar gum was used. The mixed solution was prepared by mixing the three components at room temperature, adding deionized water and stirring for 20 minutes, then maintaining a speed of 1300 r / min after injection, keeping the temperature at 50℃ and extending the stirring time to 120 minutes. The synergistic effect of the three dispersants was utilized to further inhibit the agglomeration of silicon particles and enhance the stability of the system.

[0049] The parameters for raw material pretreatment, low-temperature aging, and filtration and packaging steps are the same as in Example 2. Through the synergistic effect of inorganic silicon and organic silicon, the product's resistance to hard water is significantly improved compared to Example 2.

[0050] Example 4:

[0051] Based on the composite silicon source stress-resistant system of Example 3, this system addresses the problems of easy agglomeration, poor stability, and difficulty in mass production of existing high-concentration silicon fertilizers. It increases the total silicon source content, optimizes the raw material ratio and process parameters to suit the high-concentration system, strengthens the synergistic effect of the composite silicon source, the combined organic carrier, and the composite dispersant stabilizer, and adds preservatives to extend shelf life, achieving stable mass production of high-concentration products and expanding application scenarios. In the high-concentration system, the system stability is ensured by adjusting the dissolution process of humic acid and seaweed extract, optimizing the stepwise addition method of the silicon source, and extending the low-temperature aging time. The relevant raw material dosages and process parameters are disclosed in detail to ensure the technical solution can be implemented on a large scale and avoid situations where implementation is impossible.

[0052] (1) Raw material composition: 12 kg potassium silicate, 4 kg polyether-modified siloxane, 4 kg humic acid, 3 kg seaweed extract, 3 kg L-amino acid mixture, 1.5 kg sodium lignosulfonate, 0.5 kg xanthan gum, 0.2 kg guar gum, 0.12 kg defoamer polyether-modified siloxane, 0.05 kg potassium sorbate, and deionized water to make up to 100 kg. The L-amino acid mixture is formulated in the same proportion as in Example 2. The silicon content of the polyether-modified siloxane is not less than 30% to ensure complexation and stability at high concentrations. The potassium sorbate is food grade with a purity of not less than 99%. The purity and grade of the other raw materials are the same as in Example 1.

[0053] (2) Preparation process: The raw material pretreatment stage was adjusted to dissolve humic acid and seaweed extract separately, the humic acid dissolution temperature was increased to 50℃, the speed was adjusted to 1000r / min, and the stirring time was 35 minutes to ensure that the high amount of humic acid was completely dissolved.

[0054] After enzymatic hydrolysis of the seaweed extract, 0.1 kg of potassium dihydrogen phosphate was added to adjust the ionic strength, which was controlled at 0.05-0.1 mol / L to enhance the stability of the high-concentration system. During the mixing and emulsification stage, a stepwise silicon addition method was adopted, with potassium silicate added in three batches of 4 kg each, 20 minutes apart. The rotation speed was gradually increased from 1200 r / min to 1600 r / min at a rate of 200 r / min to avoid local agglomeration caused by concentrated silicon source addition, ensuring uniform dispersion of the silicon source and guaranteeing sufficient complexation between the composite silicon source and the organic carrier.

[0055] During the low-temperature aging stage, the temperature is reduced to 20°C at a rate of 1°C / min, the static aging time is extended to 6 hours, the stirring interval is shortened to 40 minutes, and the stirring speed is 300 r / min to further stabilize the complex structure and dispersion system. After aging, potassium sorbate is added as a preservative and stirred for 10 minutes until completely dissolved, which is suitable for long-term storage and mass production requirements.

[0056] The parameters for dispersion stabilization and filtration packaging steps are the same as in Example 3. The total silicon source content in this example is significantly higher than that in Example 3, while maintaining excellent stability.

[0057] Comparative Example 1:

[0058] (1) The raw material composition is the same as in Example 1, except that humic acid, seaweed extract and L-amino acid mixture are removed.

[0059] (2) The preparation process eliminates the humic acid dissolution step in the raw material pretreatment. Potassium silicate is directly mixed with dispersant stabilizer and deionized water. The stirring speed is 1000 r / min and the stirring time is 90 minutes. The remaining steps and parameters are the same as in Example 1.

[0060] This scheme simulates existing single-silicon source liquid fertilizers without organic carriers to verify the core role of organic carriers in silicon source complexation and crop absorption efficiency.

[0061] Comparative Example 2:

[0062] (1) Xanthan gum was removed from the raw material composition, and the amount of sodium lignosulfonate was adjusted to 1.5 kg. The remaining raw materials and amounts were the same as in Example 1.

[0063] (2) The preparation steps were not adjusted and were the same as in Example 1.

[0064] This scheme simulates existing liquid fertilizers with a single dispersant to verify the synergistic stabilizing effect of composite dispersant stabilizers.

[0065] Comparative Example 3:

[0066] (1) The raw material composition is completely consistent with that of Example 1.

[0067] (2) The preparation steps remove the low-temperature aging step, and after the dispersion and stabilization stage, the product is directly filtered and packaged. The parameters of the remaining steps are the same as in Example 1.

[0068] This scheme simulates the existing production method without aging and verifies the impact of low-temperature aging on effective silicon retention and system stability.

[0069] Comparative Example 4:

[0070] (1) The polyether-modified siloxane was removed from the raw material composition, the amount of potassium silicate was adjusted to 16 kg, and the remaining raw materials and amounts were the same as in Example 4.

[0071] (2) The preparation steps are the same as in Example 4.

[0072] This scheme simulates existing high-concentration liquid fertilizers with a single silicon source to verify the role of composite silicon sources in improving the compatibility of high-concentration systems.

[0073] Comparative Example 5:

[0074] (1) The raw material composition is the same as that in Example 1.

[0075] (2) The preparation steps are carried out by stirring and mixing at room temperature, without gradient heating and step feeding, the stirring speed is constant at 800 r / min, the stirring time is 120 minutes in total, there is no aging process, and the parameters of the other steps are the same as those in Example 1.

[0076] This scheme simulates existing traditional processes to verify the optimization effect of the gradient process of the present invention.

[0077] Comparative Example 6:

[0078] (1) The raw material composition uses potassium silicate and polyether modified siloxane composite silicon source, combined with a single humic acid organic carrier, and the dispersant is sodium lignosulfonate as a single component. The other dosages are as described in Example 3.

[0079] (2) The preparation process adopts conventional room temperature mixing, non-gradient emulsification and low temperature aging, stirring speed of 1000 r / min, stirring time of 120 minutes, and other step parameters are the same as those in Example 3.

[0080] This scheme simulates the simple superposition of core features in existing technologies to verify the performance difference between the systematic optimization of this invention and the simple superposition of technologies.

[0081] Performance testing and results analysis

[0082] Test samples and conditions:

[0083] The test samples were liquid fertilizers prepared in Examples 1 to 4 and Comparative Examples 1 to 6. Each sample was sealed and stored in a cool environment at 25°C. Three storage conditions were set at room temperature (25°C), high temperature (45°C), and low temperature (5°C). Three samples were prepared under each condition for stability testing.

[0084] Rice variety Nanjing 9108 and wheat variety Jimai 22 were selected as test crops. A blank control group consisting of water was set up. Each group was replicated three times. The plot area was 10 square meters, and the plot spacing was 1 meter. Fertilizer was applied by foliar spraying at a dilution of 500 times. It was sprayed once each at the jointing stage and the booting stage, with a spraying rate of 100 mL / m². The fertilizer effect was comprehensively evaluated. All instruments used in the test were calibrated, and the test methods complied with relevant agricultural industry standards to ensure the accuracy and reliability of the test results.

[0085] Test items and methods:

[0086] (1) Suspension stability: Referring to the agricultural industry standard NY / T1974-2010, 500 mL of each sample was placed in a stoppered graduated cylinder, sealed and left to stand. The stratification was observed at 24 hours, 72 hours and 30 days. The volume ratio of the supernatant was calculated. The suspension rate was calculated by subtracting the ratio of the volume of the supernatant to the total sample volume and then multiplying by 100%. At the same time, the change in suspension rate after 30 days under the three storage conditions was tested to evaluate the adaptability to high and low temperatures.

[0087] (2) Water solubility: Take 10g of each sample, accurate to 0.001g, and add 1000mL of 25℃ deionized water and 1000mL of hard water with a total calcium and magnesium ion content of 300mg / L respectively. Stir at 500r / min for 10 minutes, filter through a 200-mesh filter, weigh the filter residue, accurate to 0.001g. The formula for calculating water solubility is: water solubility equals one minus the ratio of the filter residue mass to the sample mass and then multiplied by 100%. Evaluate the compatibility with different water qualities.

[0088] (3) Silicon release rate: The molybdenum blue colorimetric method was used, referring to the agricultural industry standard NY / T1116-2014, to test the effective silicon soluble silicon content in the solution of each sample after preparation and after 30 days of storage, and to calculate the silicon release rate. The calculation formula is that the silicon release rate is equal to the ratio of effective silicon content to total silicon content multiplied by 100%, and the retention stability of effective silicon is evaluated.

[0089] (4) Crop fertilizer effect: After harvest, the stem toughness and lodging rate of rice, the yield and thousand-grain weight of wheat were measured, and the silicon content in the leaves was measured at the same time. Stem toughness was measured using a stem strength tester. The lodging rate was the ratio of the number of lodged plants to the total number of plants multiplied by 100%. The yield was the actual yield of the plot converted into the yield per hectare. The thousand-grain weight was the weight of 1000 seeds. The silicon content in the leaves was measured by gravimetric method. The overall effect of the product on improving crop stress resistance and yield was evaluated.

[0090] Test results and analysis:

[0091] The results and analysis of the suspension stability test are shown in Table 1 below:

[0092] Table 1:

[0093] Sample Category Suspension rate after 30 days of storage at 25℃ Suspension rate after 30 days of storage at 45℃ Suspension rate after 30 days of storage at 5℃ Layering after 72 days of storage at 25℃ Example 1 95.2% 90.1% 90.5% No obvious stratification Example 2 96.8% 91.5% 92.0% No obvious stratification Example 3 97.5% 92.8% 93.2% No obvious stratification Example 4 98.2% 93.5% 94.0% No obvious stratification Comparative Example 1 62.3% 58.1% 59.2% There is obvious stratification, with more sediment in the lower layer. Comparative Example 2 81.5% 75.3% 76.0% Slight stratification, with a small amount of sediment in the lower layer. Comparative Example 3 83.2% 78.5% 79.1% Slight stratification, no obvious sedimentation Comparative Example 4 78.6% 72.4% 73.0% There is obvious stratification, with more sediment in the lower layer. Comparative Example 5 79.8% 74.2% 75.5% Slight stratification, with a small amount of sediment in the lower layer. Comparative Example 6 85.3% 78.1% 79.5% Slight stratification, no obvious sedimentation

[0094] The suspension stability test results show that Examples 1 to 4 all exhibited excellent suspension stability under different temperature storage conditions. The suspension rate remained above 95% after 30 days of storage at 25°C, and the suspension rate remained above 90% after 30 days of storage at both high temperature (45°C) and low temperature (5°C). Moreover, there was no obvious stratification after 72 hours of storage.

[0095] Example 4, in particular, employs a synergistic system of composite silicon source, composite organic carrier and composite dispersant stabilizer, and is combined with an optimized low-temperature aging process, resulting in the best suspension stability and the highest suspension rate under all temperature conditions.

[0096] In contrast, comparative examples show the following: Comparative Example 1, lacking an organic carrier, could not form a silicon source complex structure, resulting in the worst suspension stability. After 30 days of storage at 25°C, its suspension rate was only 62.3%, and significant stratification and substantial precipitation occurred after 72 hours. Comparative Example 2, using a single dispersant and stabilizer, lacked synergistic effects, leading to significantly lower suspension stability compared to the example group. Comparative Example 3, lacking a low-temperature aging process, could not stabilize the complex structure and dispersion system, resulting in a significant decrease in suspension rate. Comparative Example 4, using a single silicon source to prepare a high-concentration product, exhibited poor system compatibility and insufficient suspension stability. Comparative Example 5, employing a traditional process without gradient emulsification and stepwise feeding, resulted in uneven component mixing and poor suspension stability. Comparative Example 6, simply superimposed existing core technology features without forming a systematic synergistic system, exhibited suspension stability far inferior to the example group and poor adaptability to high and low temperatures.

[0097] The above results fully demonstrate that the present invention forms a closely related systematic stable system through the complexation effect of organic carrier and silicon source, the synergistic effect of composite dispersing stabilizer and low temperature aging process, which significantly improves the problems of easy stratification and precipitation during high temperature storage and easy agglomeration during low temperature storage in the prior art.

[0098] The results and analysis of the water solubility test are shown in Table 2 below:

[0099] Table 2:

[0100] Sample Category Water solubility of deionized water at 25℃ Hard water solubility Appearance after hard water dissolves Example 1 99.1% 97.2% Uniform and transparent, free of flocculation and sediment. Example 2 99.3% 97.8% Uniform and transparent, free of flocculation and sediment. Example 3 99.5% 98.5% Uniform and transparent, free of flocculation and sediment. Example 4 99.2% 97.5% Uniform and transparent, free of flocculation and sediment. Comparative Example 1 95.3% 89.2% Turbid, with a small amount of flocculent matter and sediment. Comparative Example 2 96.8% 92.5% Slightly cloudy, with no obvious sediment. Comparative Example 3 97.1% 93.0% Slightly cloudy, with no obvious sediment. Comparative Example 4 96.2% 90.3% Turbid, with trace amounts of sediment Comparative Example 5 96.5% 92.0% Slightly cloudy, with no obvious sediment. Comparative Example 6 97.5% 91.7% Slightly cloudy with a small amount of flocculent matter.

[0101] The water solubility test results showed that Examples 1 to 4 all achieved a water solubility of over 99% in deionized water at 25°C, and maintained a water solubility of over 97% in hard water with a total calcium and magnesium ion content of 300 mg / L. Furthermore, all examples exhibited a uniform and transparent state after dissolving in hard water, without the formation of flocculent matter or sediment. Example 3, using a composite silicon source combining inorganic and organic silicon, demonstrated the best performance, as the organic silicon component effectively improved the compatibility of the silicon source in hard water, achieving a water solubility of 98.5%.

[0102] The water solubility of each comparative example was significantly lower than that of the example group. Comparative example 1 had no organic carrier and its water solubility in hard water was only 89.2%, and turbidity, flocculent matter, and precipitation appeared after dissolution. Comparative example 4 used a single silicon source to prepare a high-concentration product, which had poor adaptability to hard water and a water solubility of only 90.3%, with trace precipitation after dissolution. Comparative example 6 simply superimposed a composite silicon source and a single organic carrier, without forming a synergistic optimization system, and its water solubility in hard water was 91.7%, with a small amount of flocculent matter still remaining after dissolution. The water solubility of the remaining comparative examples in hard water was between 92% and 93%, and slight turbidity was observed after dissolution.

[0103] The above results show that the organic carrier compound and the composite silicon source design of the present invention form a synergistic advantage. The organic carrier can form a stable complex structure with the silicon source, and the organosilicon component in the composite silicon source can improve the hard water resistance. The two work together to significantly improve the solubility of the silicon source in different water qualities.

[0104] The test results and analysis of silicon release rate are shown in Table 3 below:

[0105] Table 3:

[0106] Sample Category Silicon release rate upon completion of preparation Silicon release rate after storage at 25℃ for 30 days 30-day release rate decline Example 1 90.5% 88.2% 2.3% Example 2 94.3% 92.1% 2.2% Example 3 92.6% 90.5% 2.1% Example 4 91.8% 89.7% 2.1% Comparative Example 1 76.5% 68.2% 8.3% Comparative Example 2 82.8% 77.5% 5.3% Comparative Example 3 82.3% 77.8% 4.5% Comparative Example 4 80.5% 74.2% 6.3% Comparative Example 5 81.2% 75.8% 5.4% Comparative Example 6 86.2% 79.5% 6.7%

[0107] The silicon release rate test results show that the silicon release rate of Examples 1 to 4 all reached over 90% upon completion. Example 2, using an organic carrier composed of seaweed extract and humic acid, achieved the highest release rate of 94.3% due to the synergistic effect of seaweed polysaccharides and amino acids in promoting silicon source dissociation. After 30 days of storage, the silicon release rate of Examples 1 to 4 decreased by less than 3%, indicating stable retention of effective silicon and ensuring the long-term fertilizer efficacy of the product. The comparative examples performed poorly. Comparative example 1 lacked an organic carrier and could not stabilize the effective silicon form. The release rate was only 76.5% upon completion of preparation, and dropped to 68.2% after 30 days of storage, a decrease of 8.3%, indicating severe loss of effective silicon. Comparative example 3 lacked a low-temperature aging process, resulting in an unstable complex structure and easy aggregation and precipitation of effective silicon, with a release rate decrease of 4.5%. Comparative example 6 simply superimposed core technology features without forming a systematic optimization, and the release rate decreased by 6.7% after storage, failing to maintain long-term fertilizer effectiveness. The release rates of the remaining comparative examples were all between 80% and 83% upon completion of preparation, and the decrease after storage all exceeded 5%, indicating significant degradation of fertilizer effectiveness.

[0108] The above results confirm that the organic carrier synergy and low-temperature aging process of the present invention can effectively promote the dissociation of silicon source and stabilize the effective silicon morphology, and significantly improve the effective silicon retention rate compared with the prior art.

[0109] Crop fertilizer efficiency test results and analysis:

[0110] Sample Category Increase in rice stem toughness Rice lodging rate Wheat production increase Increase in thousand-grain weight of wheat Increase in silicon content in crop leaves Example 1 20.5% 2.8% 12.3% 5.2% 30.2% Example 2 28.3% 2.0% 16.5% 6.8% 38.5% Example 3 32.1% 1.5% 20.0% 7.8% 42.3% Example 4 35.0% 1.2% 18.2% 7.2% 45.0% Comparative Example 1 12.1% 14.8% 7.5% 2.5% 18.3% Comparative Example 2 10.5% 12.3% 8.2% 3.0% 20.1% Comparative Example 3 11.3% 10.5% 8.8% 3.2% 21.5% Comparative Example 4 13.2% 9.8% 8.5% 2.8% 19.8% Comparative Example 5 10.8% 11.2% 7.8% 2.9% 20.5% Comparative Example 6 14.5% 10.3% 9.7% 3.8% 22.6%

[0111] The results of crop fertilizer efficacy tests showed that Examples 1 to 4 significantly improved the stress resistance and yield of rice and wheat compared to the control groups and the parallel ratios. Regarding lodging resistance in rice, Examples 1 to 4 showed a 20.5% to 35.0% increase in stem toughness compared to the control group, with lodging rates controlled between 1.2% and 2.8%. Example 4, using a high-concentration composite silicon source formulation, exhibited the greatest improvement in stem toughness and the lowest lodging rate (only 1.2%). Example 3, due to the synergistic effect of the composite silicon source and organic carrier, showed the best balance between lodging resistance and yield improvement. In terms of wheat yield and thousand-grain weight, Examples 1 to 4 showed yield increases of 12.3% to 20.0% and thousand-grain weight increases of 5.2% to 7.8%. Example 3 showed the best performance, with a yield increase of 20.0% and a thousand-grain weight increase of 7.8%.

[0112] Regarding the silicon content in crop leaves, the increase in the example group was 30.2% to 45.0%, which was significantly higher than the 18.3% to 22.6% in the comparative group. This indicates that the product prepared by this technical solution can more efficiently promote the absorption of silicon by crops. Through the accumulation of silicon in the crop, the stem structure is strengthened and the photosynthetic efficiency is improved, thereby achieving a simultaneous increase in stress resistance and yield.

[0113] The improvement in fertilizer efficiency of each ratio is limited, mainly due to the lack of corresponding optimization features and synergistic systems, resulting in insufficient silicon absorption efficiency and stability.

[0114] The above test results are all based on standardized test procedures, and the data are accurate and reliable. Combined with the process differences of each embodiment and comparative example, the effects of each optimization dimension can be clearly defined. At the same time, the relevant technical details and process parameters have been fully disclosed to ensure that those skilled in the art can reproduce this technical solution.

[0115] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A water-soluble organic suspended silica liquid fertilizer, characterized in that, It is composed of a silicon source, a compounded organic carrier, a compounded dispersion stabilizer, a defoamer, and water; the compounded organic carrier includes humic acid and amino acids; the compounded dispersion stabilizer includes sodium lignosulfonate and xanthan gum; the silicon source includes potassium silicate; the weight of each component is as follows: potassium silicate 6-12 parts, humic acid 3-5 parts, amino acids 2-3 parts, sodium lignosulfonate 0.8-1.5 parts, xanthan gum 0.3-0.5 parts, defoamer 0.08-0.12 parts, and water to make up to 100 parts.

2. The water-soluble organic suspended silica liquid fertilizer according to claim 1, characterized in that, The compounded organic carrier also contains seaweed extract, the seaweed extract being 3-4 parts by weight.

3. The water-soluble organic suspended silica liquid fertilizer according to claim 1, characterized in that, The silicon source also includes polyether-modified siloxane, wherein the weight of the polyether-modified siloxane is 3-4 parts.

4. The water-soluble organic suspended silica liquid fertilizer according to claim 1, characterized in that, The composite dispersion stabilizer also contains guar gum, wherein the weight of the guar gum is 0.1-0.2 parts.

5. The water-soluble organic suspended silica liquid fertilizer according to claim 1, characterized in that, The amino acid is a mixture of alanine, glutamic acid and glycine, or a mixture of alanine, glutamic acid and aspartic acid.

6. The water-soluble organic suspended silica liquid fertilizer according to claim 2, characterized in that, The seaweed extract is obtained by enzymatic hydrolysis of sodium alginate.

7. The water-soluble organic suspended silica liquid fertilizer according to claim 1, characterized in that, It also contains a preservative, which is potassium sorbate, in a weight of 0.05 parts.

8. A method for preparing a water-soluble organic suspended silica liquid fertilizer as described in any one of claims 1 to 7, characterized in that, Includes the following steps: (1) Raw material pretreatment: Humic acid is added to part of the water, heated and stirred until completely dissolved to obtain humic acid aqueous solution; sodium lignosulfonate and xanthan gum are mixed, added to part of the water, and stirred at room temperature to form a colloidal dispersion; (2) Mixing and emulsification: Potassium silicate is slowly added to humic acid aqueous solution while stirring and heating. After stirring, amino acids are added and stirring is continued to form a primary mixture. (3) Dispersion stability: Slowly inject the colloidal dispersion into the primary mixture, adjust the speed and keep it warm while stirring, and add the defoamer in two batches during the process; (4) Low-temperature aging: Cool the mixture obtained in step (3) to 20-25℃, seal and let it stand for aging, stirring intermittently during the process; (5) Filtration and packaging: The aged mixture is filtered and packaged to obtain the finished product.

9. The preparation method according to claim 8, characterized in that, In step (1), the heating temperature for dissolving humic acid is 45-50℃ and the stirring speed is 800-1000r / min; the stirring speed for the colloidal dispersion is 600r / min and the stirring time is 20 minutes.

10. The preparation method according to claim 8, characterized in that, In step (2), the temperature is raised to 50°C and the stirring speed is 1000-1200 r / min; in step (3), the stirring speed is 1200-1300 r / min, the holding temperature is 50°C, and the stirring time is 90-120 minutes; in step (4), the aging time is 4-6 hours, the time interval between stirring is 40-60 minutes, and the stirring speed is 300 r / min.