Efficient compatibility method of functional water-soluble fertilizer

Abstract

The invention discloses an efficient compatibility method of a functional water-soluble fertilizer, and relates to the field of energy conservation and environmental protection. The problems that water-soluble fertilizers are easy to precipitate and block drops during mixing, trace instability is caused, pH drifts are caused by hard water, and the consistency of the fertilizers and the pesticides in the same barrel and between batches is poor are solved. According to the invention, water quality diagnosis and function setting are carried out, AB barrels are grouped, stable trace amounts of EDTA, DTPA and EDDHA are selected according to a pH window, buffering, dispersing, wetting and defoaming are carried out, preparation is carried out according to a feeding sequence, and tank testing, turbidity, filtering and cold and hot cycle release are carried out. The fertilizer has the actual effects of inhibiting precipitation and crystallization, improving the utilization rate and stability, adapting to soft and hard water, being more stable in fertilizer efficiency and reducing the maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural fertilizer preparation, in particular to a functional water-soluble fertilizer efficient preparation method. BACKGROUND

[0002] The existing water-soluble fertilizer is widely used in facility horticulture and field irrigation, which is prepared by mother liquor and then added to the drip irrigation or spraying system according to the proportion. In order to adapt to the functional requirements of crops in different growth periods, a large number of functional formulas and AB two-bar packaging ideas appear in the market. However, there are differences in water quality and equipment conditions between the production end and the field end, and the coexistence of multiple sources of raw materials and functional additives makes the matching relationship between the formula, water quality, process and application increasingly complex.

[0003] The traditional scheme generally has the problems of insufficient compatibility and stability: calcium, magnesium and phosphate, sulfate coexist to easily generate precipitate, block the dripper and nozzle; iron, manganese, zinc and copper are easily hydrolyzed and precipitated in neutral alkaline water, and the effectiveness of trace elements decreases; the pH of the solution is easy to drift under different water quality, and the ion strength is too high, which leads to flocculation, stratification or crystallization; when mixed with some pesticides / conditioners in the same barrel, foaming, thickening or instability may occur. The above problems directly lead to uneven fertilizer supply, frequent equipment maintenance and fluctuation of fertilizer efficiency.

[0004] The traditional preparation process and quality control links lack systematization and verifiable standards, and the NPK and trace element proportion is determined by experience, without quantization to the EC and pH window according to the crop and stage; the selection and feeding sequence of chelating agents are improper, and the stability of trace elements is poor; the water quality is not diagnosed in advance, and the AB barrel grouping principle is not strictly implemented; the stable system configuration such as buffer, dispersion, anti-scale, wetting and defoaming is random; after preparation, only visual inspection or short-term standing is performed, and there is a lack of dilution tank test, turbidity and filtration evaluation, cold and hot cycle and accelerated storage release standards; the storage and on-site dissolution conditions are weakly controlled, which leads to obvious batch difference and seasonal difference, and the so-called functional type often deviates from the actual physiological needs of crops. SUMMARY

[0005] The main purpose of the present application is to provide a functional water-soluble fertilizer efficient preparation method, which can effectively solve the problems in the background art.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a functional water-soluble fertilizer efficient preparation method, comprising the following steps: S1: diagnosing the water quality of the fertilizer water, and measuring the pH value, hardness, alkalinity, conductivity and other parameters; S2: setting the formula requirement according to the crop type and target function, including the proportion of nitrogen, phosphorus and potassium, the required trace elements and the application pH and EC window; S3: According to ion compatibility, the components are divided into two barrels A / B, wherein the components such as calcium and magnesium which are easy to form precipitates with phosphate and sulfate are placed in barrel A, and phosphate, sulfate and most of the trace elements are placed in barrel B; S4: According to the pH value of the prepared mother liquor, a chelating agent is selected; S5: A buffer, a dispersing anti-scale agent, a wetting agent, an antifoaming agent and the like are added to the prepared solution to construct a stable system; S6: The components are sequentially added in order, i.e., water and a buffer are first added, trace element solution and macroelement solution are then added, and functional additives are finally added, followed by stirring and adjustment of pH value and total volume to ensure that each component is fully dissolved; S7: The prepared solution is subjected to dilution test, turbidity observation, filtration test and cold-hot cycle test to evaluate the compatibility and long-term stability of the prepared system; S8: A stable functional water-soluble fertilizer mother liquor or high-solubility granule is finally obtained.

[0007] Further, in S3, the formula components are divided into barrel A and barrel B according to ion compatibility, wherein barrel A includes components such as calcium and magnesium which are easy to form precipitates with phosphate and sulfate, and barrel B includes phosphate, sulfate and most of the trace elements.

[0008] Further, in S4, a chelating agent is selected according to the pH value of the prepared mother liquor: when the pH value is low, EDTA chelating agent is selected, when the pH value is moderate, DTPA chelating agent is selected, and when the pH value is high, EDDHA chelating agent is selected.

[0009] Further, in S6, the components are sequentially added in order: water and a buffer are first added, trace element solution and macroelement solution are then added, and functional additives are finally added, followed by stirring and adjustment of pH value and total volume to ensure that each component is fully dissolved.

[0010] Further, in S1, the pH value, hardness and alkalinity of the water for fertilization are measured and the water quality is diagnosed, and the subsequent formula is adjusted according to the water quality characteristics, for example, when the calcium and magnesium content in the water is high, the separation measures of barrel A are strengthened or the amount of buffer is increased to prevent the formation of precipitates.

[0011] Further, in S2, the nutrient range of the set formula includes: the mass ratio of nitrogen, phosphorus and potassium meets the fertilizer requirement characteristics of the selected crop; and the formula contains trace elements such as iron, manganese, zinc, copper, boron and molybdenum, and the content of the trace elements is generally in the range of 0.01% to 5.0%.

[0012] Compared with the prior art, the present application has the following beneficial effects: The application integrates water quality diagnosis, function target setting, formula solving, ion incompatibility avoidance, stable system construction, feeding process, compatibility release into an integrated process, forming a reproducible and quantifiable compounding methodology. Through A / B barrel grouping, pH window control and EDTA / DTPA / EDDHA chelation, combined with buffer, dispersion anti-scale, wetting, defoaming stable system, inhibition of calcium phosphate, calcium sulfate and other precipitates and flocculation, crystallization, reducing the clogging of drippers and nozzles and maintenance, improving the transparency and storage stability of mother liquor and diluent.

[0013] Based on the EC and pH target window, the functions of promoting root growth, flower setting, fruit expansion and quality improvement, and stress resistance are established in a mapping relationship with NPK and trace element supply. Trace elements exist in a stable chelated form adapted to the pH, root penetration and leaf spraying are more controllable, nutrient utilization rate and fertilizer efficiency are more stable; at the same time, through water quality grading and ion strength management, it can be ensured that soft water, hard water, different regions and seasonal conditions can be stably compounded, and the universality and adaptability are enhanced.

[0014] The feeding order, dissolution temperature and stirring time are determined, and two product forms of mother liquor and high solubility particles are provided, so that high-efficiency, low-foaming, low-caking and good filtration passing properties are achieved; tank test, turbidity, filterability, cold and hot cycle, accelerated storage release standards and white and black list of fertilizer and pesticide in the same barrel are established, which pre-identifies the compounding risk, facilitates large-scale production and quality traceability, and reduces the nutrient and operation and maintenance cost per unit output. DETAILED DESCRIPTION

[0015] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that these implementations are discussed solely for the purpose of illustrating aspects of the subject matter described herein and are not a limitation of the scope, applicability, or examples set forth in the claims. Changes in the function and arrangement of elements discussed can be made without departing from the scope of the subject matter described in this specification. Each example can omit, substitute, or add various processes or components according to particular implementations. For example, the described processes can be performed in an order different than described, and various steps can be added, omitted, or combined. Also, features described with respect to some examples can be combined in other examples.

[0016] As used herein, the term "includes" and its variants are meant to be an open term, encompassing the listed items and equivalents thereof. The term "based on" means "based at least in part on." The terms "one embodiment" and "an embodiment" mean "at least one embodiment." The term "another embodiment" means "at least one additional embodiment." The terms "a first," "a second," etc. do not require that there be only one of each, but rather, there can be one or more of each. Other definitions can be found throughout this disclosure, whether explicitly stated or whether implicit from the context. Unless otherwise indicated, the definitions apply throughout this specification, including in the claims.

[0017] Embodiments The present application provides a technical solution: A high-efficiency compounding method of functional water-soluble fertilizer, comprising the following steps: S1: Diagnose the water quality of the fertilizer water, and measure the pH value, hardness, alkalinity, conductivity and other parameters thereof; S2: Set the formula requirements according to the crop type and target function, including the proportions of nitrogen, phosphorus and potassium, the required trace elements, and the pH and EC windows for application; S3: According to the ion compatibility, the components are divided into A / B two barrels, wherein the components prone to form precipitates with phosphate and sulfate, such as calcium and magnesium, are placed in the A barrel, and the phosphate, sulfate and most trace elements are placed in the B barrel; S4: Select a chelating agent according to the pH value of the prepared mother liquor; S5: Add buffer, dispersant, wetting agent, defoaming agent and other components to the prepared solution to construct a stable system; S6: Add water and buffer first, then add trace element solution and macroelement solution, and finally add functional additives, and then stir and adjust the pH value and total volume to ensure that all components are fully dissolved; S7: Perform dilution test, turbidity observation, filtration test and cold and hot cycle test on the prepared solution to evaluate the compatibility and long-term stability of the compounding system; S8: Finally, a stable functional water-soluble fertilizer mother liquor or high-solubility granules are obtained.

[0018] Further, in S3, the formula components are divided into A barrel and B barrel according to the ion compatibility, wherein the A barrel includes components prone to form precipitates with phosphate and sulfate, such as calcium and magnesium, and the B barrel includes phosphate, sulfate and most trace elements.

[0019] Further, in S4, a chelating agent is selected according to the pH value of the prepared mother liquor: when the pH value is low, EDTA chelating agent is selected, when the pH value is moderate, DTPA chelating agent is selected, and when the pH value is high, EDDHA chelating agent is selected.

[0020] Further, the S6 sequentially adds each component: first add water and buffer, then add trace element solution and macroelement solution, then add functional additives, and fully stir, finally adjust pH value and total volume to ensure that each nutrient component is stably dissolved.

[0021] Further, the S1 measures and diagnoses water quality of the water for fertilization, such as pH value, hardness, alkalinity, etc., and adjusts the subsequent formula according to the water quality characteristics, for example, when the calcium and magnesium content in the water is high, the corresponding A bucket separation measures are strengthened or the buffer amount is increased, so as to prevent the generation of precipitate.

[0022] Further, the nutrient range of the formula set in the S2 includes: the mass ratio of nitrogen, phosphorus, and potassium respectively meets the fertilizer requirement characteristics of the selected crop; and the formula contains iron, manganese, zinc, copper, boron, molybdenum and other trace elements, and the content of the trace elements is generally in the range of 0.01% to 5.0%.

[0023] The tomato is selected as the test crop in this embodiment, and the functional target is to promote root growth. The raw materials and the ratio are shown in the table (calculated per 100L of water): Potassium nitrate (chemical formula: KNO3, industrial grade): 15kg Calcium nitrate tetrahydrate (chemical formula: Ca(NO3)2·4H2O, industrial grade): 5kg Magnesium nitrate hexahydrate (chemical formula: Mg(NO3)2·6H2O, industrial grade): 1kg Potassium sulfate (chemical formula: K2SO4, industrial grade): 0.5kg Urea (CO(NH2)2, industrial grade): 1kg Glycine (chemical formula: C2H5NO2, food grade): 0.2kg Fresh amine ester (98% purity, plant growth regulator): 0.01kg Boric acid (H3BO3, industrial grade): 0.05kg Preparation method: add 50L of pure water to the reaction container, heat to about 30°C and stir. Add calcium nitrate and magnesium nitrate in sequence, stir for about 30min to dissolve; then add potassium nitrate, potassium sulfate and urea, stir for 15min; finally add glycine, fresh amine ester and boric acid, make up to 100L and continue to stir for 20min, so that all raw materials are completely dissolved. The obtained mother liquor is clear and transparent, and no visible solid precipitate is generated.

[0024] The finished product has the following physicochemical indexes: the pH of the obtained mother liquor is about 6.8, the conductivity is about 3.2 mS / cm, and the solution has high clarity. After the mother liquor is diluted 500 times and 1000 times in neutral hard water with a pH of 7.2 and a hardness of 250 mg / L CaCO3, the diluted solution is stable and clear without obvious turbidity, and can be filtered through a 0.45 μm filter membrane without residual precipitate. The mother liquor is frozen at -18°C for 24 hours without stratification or crystallization, indicating that the product has good low-temperature resistance.

[0025] Verification and effect: Laboratory hydroponics and field tests show that the mother liquor can significantly promote tomato root growth and improve plant traits. In the hydroponics test, compared with the blank control, the tomato root length and root fresh weight significantly increased after applying the water-soluble fertilizer, indicating that the formula promotes root growth. In the greenhouse tomato field control test, after applying the mother liquor for 5 days, the plant leaves turned dark green, the chlorophyll content increased by about 15%; the plant height and circumference increased, the root system was more developed, and the overall yield increased by more than 10%. The fruits matured faster, the peel was smooth and tight, and the disease and stress resistance was also improved, which is consistent with the reports in the literature that amino acid water-soluble fertilizer promotes growth, yield and quality after application.

[0026] Example 2 In this example, peppers are selected as test crops, and the functional goal is to promote root growth. The solid granular formula (per 100 kg) is as follows: Calcium nitrate tetrahydrate: 3 kg Urea: 2 kg Potassium nitrate: 5 kg Monopotassium phosphate: 1 kg Amino acid chelated copper (containing Cu): 0.5 kg Indole-3-acetic acid: 0.1 kg Sodium humate: 0.8 kg Chelated iron: 0.2 kg Other trace elements (Zn, Mn, B, Mo, etc.): appropriate amount Preparation method: After the above raw materials are thoroughly mixed and uniformly granulated into granular fertilizer, 2 kg of the granular fertilizer is applied per 667 m 2 The granular fertilizer is applied by flushing with water or spreading on the soil surface. The solubility index: after 5 kg of the granular fertilizer is dissolved in 100 L of water and stirred, the solution has a pH of about 7.0 and an EC of about 2.8 mS / cm. The filtrate is clear and transparent without visible solid sediment.

[0027] Verification test: The obtained solution was subjected to dilution stability test. The diluted solution was clear and stable without obvious turbidity. Only a few crystals were precipitated after rapid freeze-thaw for 24 h, which did not affect use. The filtrate after dilution could still be filtered through a 0.45 pm filter membrane without obvious blockage, indicating that the components in the granular formula had good mutual solubility and stability. Field effect: The formula contains IAA and rich amino acids, which can promote the growth of pepper roots. Literature indicates that growth regulators such as prohexadione can be used for pepper crops. Field control tests showed that after applying the granular fertilizer, the pepper roots were developed, the plant height and root fresh weight increased significantly, the plant vigor and stress resistance increased, the single fruit weight increased by about 12%, and the leaves were dark green. In summary, the fertilizer formula of this embodiment has a significant promoting effect on the growth of pepper roots and plant health, which is consistent with the effect of similar formula in the literature.

[0028] Example 3 This example selects citrus as the test object, and the functional goal is to improve the fruit setting rate and fruit quality. Main raw materials and amounts (per 100 L mother liquor): Potassium nitrate: 6 kg Calcium nitrate tetrahydrate: 2 kg Monopotassium phosphate (MKP): 3 kg Magnesium sulfate: 0.5 kg Indoleacetic acid: 0.02 kg 6-Benzylaminopurine (cytokinin): 0.01 kg Chelated trace elements (containing B, Fe, Zn, Mn): 0.1 kg each Preparation process: Warm water at 30°C is added to the reaction kettle, calcium nitrate and magnesium sulfate are first added and stirred to dissolve; then potassium nitrate and MKP are added in order, stirred for 10 min; then IAA, 6-BA and trace elements are added, made up to 100 L and stirred for 20 min. The obtained mother liquor is clear and transparent, pH ≈ 6.5.

[0029] Physical and chemical indicators of finished product: The solution EC ≈ 3.5 mS / cm, clear and transparent after filtering through a 0.45 pm filter membrane; diluted 500 times in simulated neutral hard water without obvious turbidity, stable; no crystallization or stratification after freezing at -18°C for 24 h, the physical and chemical indicators meet the requirements of high-quality water-soluble fertilizer.

[0030] Verification and effect: The field test takes conventional fertilization as the control. After applying the mother liquor, the fruit drop rate of citrus in the flowering stage is significantly reduced, and the fruit setting rate is increased. Later observation shows that the fruit diameter of the treatment group increases, the single fruit weight increases, the fruit skin thickness is moderate, the soluble solids content is increased, and the fruit skin coloration is better. Studies have shown that potassium supplementation can make citrus fruit swell, increase soluble solids and vitamin content, improve fruit skin hardness, and reduce fruit cracking; calcium supplementation can significantly reduce fruit acidity, increase sugar content, and mature earlier. This example realizes the effects of flower retention and fruit setting and quality improvement by supplementing potassium, calcium, and hormone raw materials: compared with the control group, the single fruit weight of the treatment group increases by about 15%, the soluble solids content increases by about 10%, and the fruit skin color is more uniform and bright. In summary, this formula significantly improves the fruit setting rate and fruit quality of citrus, consistent with relevant research reports.

[0031] Example 4 This example selects strawberries as the test crop, and the functional goal is to improve the fruit setting rate and fruit quality. The granular formula (per 100 kg of solid) is as follows: Potassium nitrate: 8 kg Magnesium nitrate: 1 kg Potassium dihydrogen phosphate: 2 kg Calcium-magnesium-phosphorus compound fertilizer: 5 kg Humic acid (rich in organic matter): 2 kg Indole-3-butyric acid: 0.05 kg Trace element chelate (containing B, Zn, Mn): 0.1 kg each Preparation method: After uniformly mixing the above raw materials, grind and granulate to prepare composite granules. When applying, spread 5 kg of the composite fertilizer per 667 m 2 of soil, combined with irrigation or covering the soil layer.

[0032] Product solubility: Take 5 kg of solid in 100 L of water and stir thoroughly. The obtained solution has a pH of about 7.2 and an EC of about 3.0 mS / cm. After filtration, the solution is clear and transparent, and after dilution by 500 times, it is not turbid, with good stability.

[0033] Verification and effect: The field test results show that, compared with conventional fertilizers, after applying the composite fertilizer, the fruit of strawberries is more uniform in color, swells more rapidly, the fruit is full and hard, the sugar-acid ratio and soluble solids content are significantly increased. Studies have shown that appropriate potassium application can increase the soluble solids and sugar content of strawberry fruit. The strawberry test results of this example show that the fruit yield of the treatment group is increased by more than 50% compared with the control, the single fruit weight is increased by about 20%, and the soluble solids content is increased by about 15%, which is consistent with relevant research. The fruit color is bright, and the disease resistance is enhanced, indicating that this formula effectively promotes the swelling and quality improvement of strawberry fruit.

[0034] Example 5 This embodiment selects grape as the test crop, and the functional goal is to promote fruit enlargement and increase sugar content. The mother liquor formula (per 100 L): Potassium nitrate: 12 kg Calcium nitrate tetrahydrate: 2 kg Magnesium sulfate: 1 kg Monopotassium phosphate: 3 kg Gibberellin: 0.02 kg Amino acid hydrolysate: 5 kg Sodium humate: 1 kg Trace element chelate: 0.2 kg Preparation method: First, add calcium nitrate and magnesium sulfate to water, heat and stir to dissolve; then add potassium nitrate, monopotassium phosphate and amino acid hydrolysate in turn, continue to stir; finally add gibberellin, humic acid and trace elements, make up to 100 L and stir for 20 min. The obtained mother liquor is clear and transparent, pH ≈ 6.9, EC ≈ 3.5 mS / cm.

[0035] Verification test: Take the obtained mother liquor to simulate hard water and perform 500 times dilution and freeze-thaw cycle test respectively. The dilution solution is clear, no flocculent precipitates; after freeze-thaw, the solution remains clear and stable, no crystallization and precipitation, indicating good stability of the formula.

[0036] Application effect: After spraying the mother liquor in the grape garden, the fruit clusters and grains enlarge uniformly, and the overall fruit cluster weight increases significantly. The treated group of grape fruits turns color earlier than the control group, the sugar content increases, and the sugar content is about 8%-10% higher, and the flavor improves. The plant leaf color is fresh green, and the plant vigor is strong. Comprehensive observation, the uniformity of the treated group of fruits and the sugar-acid ratio are improved, indicating that the mother liquor has good effect on grape fruit enlargement and sugar increase.

[0037] Example 6 This embodiment selects pepper as the test crop, and the goal is to promote fruit enlargement and improve quality. Granular formula (per 100 kg): Potassium nitrate: 6 kg Urea: 3 kg Monammonium phosphate: 2 kg Potassium sulfate: 1 kg Amino acid organic matter (humic acid): 4 kg Calcium nitrate tetrahydrate: 1 kg Magnesium sulfate: 0.5 kg Trace element chelate: 0.2 kg Preparation method: Mix the above raw materials uniformly to form granules. Solubility test: after 5 kg of granules are dissolved in 100 L of water, the obtained solution is clear, pH ≈ 7.0, EC ≈ 2.8 mS / cm, and the filtrate is transparent and residue-free after filtration.

[0038] Verification test: the mother liquor was diluted 500 times in simulated hard water, the diluted solution was clear and stable, no precipitation or turbidity was observed; after cold and hot cycle test, the particles remained loose and no caking was observed, the performance was stable.

[0039] Application effect: after spraying the compound fertilizer on the field, the pepper fruit swells faster, the fruit skin is bright and uniform, the single fruit weight increases by about 15%, the fruit sweetness and flavor are improved. The fruit flesh is thick and firm, the abnormal fruit is significantly reduced, the fruit setting degree and yield are significantly better than the control, which proves that the formula of the granules effectively improves the quality of the pepper fruit.

[0040] Example 7 In this example, tomatoes were selected as test crops, and the functional goal was to enhance stress resistance (salt and alkali tolerance, low temperature tolerance). The mother liquor formula (per 100L): Calcium nitrate tetrahydrate: 4kg Magnesium nitrate: 1kg Zinc nitrate: 0.1kg Magnesium sulfate: 0.5kg Copper nitrate: 0.02kg Sodium humate: 2kg Amino acids (mixed animal / plant source): 1kg Seaweed extract (biostimulant): 0.5kg Preparation method: first, add calcium nitrate, magnesium nitrate and humic acid to water, stir and heat to dissolve; then add zinc nitrate, magnesium sulfate and seaweed extract, stir evenly; finally, make up to 100L, and add trace elements to adjust pH to ≈6.8, EC ≈2.9mS / cm. The obtained mother liquor is clear and no precipitation is observed.

[0041] Verification test: after diluting the mother liquor according to the conventional ratio, the solution is clear and stable. After cold and hot cycle test, the solution remains clear and no crystallization is observed. During bottle storage, no phase separation or caking is observed within 1 month, indicating that the formula is stable.

[0042] Application effect: in the greenhouse cotton and tomato pot simulation stress test, the treatment group of the water-soluble fertilizer performed significantly better than the control. After treatment, the tomato plant height increased by about 15%-20%, the root dry weight increased by 30%-40%, the leaf malondialdehyde content decreased by about 20%, the soluble sugar content increased by about 10%, and the seedling survival rate increased significantly. These indicators show that the formula reduces oxidative damage caused by stress and enhances the plant's salt and alkali tolerance and low temperature tolerance. In addition, after fertilization, the plant leaves are dark green, the growth is vigorous, the incidence of diseases and pests is reduced, and the final tomato yield is significantly higher than the control.

[0043] Example 8 In this example, strawberries were selected as test crops, and the goal was to improve the plant's drought and disease resistance. Granule formula (per 100kg): Potassium nitrate: 7kg Urea: 3kg Potassium dihydrogen phosphate: 2kg Humic acid (rich in organic matter): 5kg Seaweed extract: 1kg Multiple amino acids: 0.5kg Trace element chelates: 0.1 kg Preparation method: Mix the above raw materials thoroughly and grind them into granules. Solubility test: Add 5 kg of compound fertilizer to 100 L of water and stir. The solution is clear, pH ≈ 6.5, EC ≈ 2.5 mS / cm; after filtration, the filtrate is transparent and there is no suspended matter residue.

[0044] Verification test: The solid was stored under high temperature and low temperature conditions for 7 days and no deliquescence or clumping was observed; after 500 times dilution, the solution remained clear and transparent with no precipitation.

[0045] Application Effects: Field application results showed that strawberry plants treated with this compound fertilizer exhibited enhanced drought resistance, darker green leaves, and improved disease resistance. Compared with the control group, the soluble solids content and disease resistance index of the treated fruit were both increased, and the overall yield and marketable rate were significantly increased. This formula significantly improved the stress resistance and yield of strawberries.

[0046] Example 9 This embodiment uses citrus trees, with the functional objective of improving fruit quality (sweetness, color, and storage resistance). Mother liquor formula (per 100L): Calcium nitrate tetrahydrate: 2kg Potassium sulfate: 2kg Potassium dihydrogen phosphate: 3kg Zinc nitrate: 0.05 kg Humic acid (rich in organic matter): 4kg Organic nitrogen fertilizer (such as urea-formaldehyde): 1 kg Trace element chelates: 0.2 kg Preparation method: Dissolve the above raw materials in water sequentially, stir well, and then add to a final volume of 100L. The resulting mother liquor is clear, with a pH of approximately 6.8 and an EC of approximately 3.1 mS / cm.

[0047] Verification test: The solution was clear and free of turbidity after 500-fold dilution of the mother liquor. No crystallization was observed after 24 hours of freeze-thaw cycles at -18℃, indicating stable performance. The test results meet the standards for high-quality water-soluble fertilizer.

[0048] Application effect: Orchard tracking tests show that the sugar content of citrus fruits treated with the mother liquor is significantly improved, the peel color is brighter, the fruit shape is plump, and the resistance to storage and transportation is enhanced. Research shows that appropriate potassium supplementation can significantly increase the soluble solids, vitamin content and sweetness of citrus fruits, while the peel is harder and the color is deeper; appropriate calcium supplementation can promote sugar accumulation, make the fruit surface smooth and mature earlier. In this embodiment, the soluble solids content of the treated group of citrus fruits is about 8% higher than that of the control group, the sugar-acid ratio is significantly improved, and the peel gloss and hardness are improved, which is consistent with the results of related research.

[0049] Example 10 This example selects grapes as the test object, aiming to improve the sweetness and flavor of the fruit. Granular formula (per 100 kg): Potassium nitrate: 5 kg Superphosphate: 3 kg Calcium nitrate: 2 kg Humic acid: 4 kg Amino acid chelated magnesium and zinc: 0.5 kg Potassium-calcium-molybdenum compound fertilizer: 3 kg Preparation method: Mix the above raw materials uniformly and granulate into compound granular fertilizer that meets the grading requirements. When applied, 6 kg of the compound granular fertilizer is applied per 667 m 2 of base fertilizer.

[0050] Product solubility: After 5 kg of solid is completely dissolved in 100 L of water, the solution has a pH of about 7.0, an EC of about 2.7 mS / cm, and is clear and transparent with no suspended residue.

[0051] Verification test: The diluted solution is clear without turbidity, and the granules do not cake or decompose after freezing or high-temperature cycle tests, with stable fertilizer efficiency.

[0052] Application effect: Field tests show that after applying the granules, the sugar content of grape fruits is about 10% higher than the control, the acidity is reduced, the peel color is full and uniform, the fruit drop rate during flowering and fruiting is reduced, the fruit uniformity is improved, the plant leaf color is dark green, and the plant growth is vigorous. Comprehensive evaluation shows that the treated group of grapes has a strong aroma and significantly better quality than the control, meeting the requirements of improved fertilization technology to improve fruit quality.

[0053] Example 11 This example is set for pepper crops, with the functional goal of promoting uniform and deep fruit color. Mother liquor formula (per 100 L): Potassium nitrate: 4 kg Calcium nitrate tetrahydrate: 1 kg Potassium dihydrogen phosphate: 2 kg Boric acid: 0.05 kg Potassium chloride: 1 kg Melatonin or ethylene: 0.01 kg Humic acid: 2 kg Trace element mixed chelate: 0.2 kg Preparation method: Add calcium nitrate, potassium nitrate and potassium dihydrogen phosphate into warm water in sequence, stir to dissolve, then add boric acid, humic acid and melatonin, finally add water to 100 L and stir evenly. The obtained mother liquor is clear and transparent, pH ≈ 6.7, EC ≈ 3.0 mS / cm.

[0054] Verification test: After the mother liquor is diluted 500 times, the solution is clear and stable without turbidity. No crystallization or stratification occurs after being frozen at -18℃ for 24 h.

[0055] Application effect: The application of the water-soluble fertilizer during the ripening period of pepper fruits can make the fruit color more uniform and bright. Related reports show that the use of calcium and boron-containing foliar fertilizer and potassium dihydrogen phosphate can make the fruit color more uniform and faster, and improve the fruit peel hardness and toughness, and reduce the fruit cracking rate. The field test results of this embodiment also show that compared with the control group, the fruit color of the treatment group is more uniform, the fruit color speed is accelerated by about 3 days, the fruit peel is firm and compact, and the fruit cracking rate is reduced by more than 50%, which fully verifies the color promoting effect of the formula.

[0056] Example 12 This embodiment takes strawberries as the object, and the functional target is to promote the fruit color to be more bright and uniform. Granular formula (per 100 kg): Potassium nitrate: 3 kg Calcium nitrate: 1 kg Potassium dihydrogen phosphate: 2 kg Calcium and magnesium amino acid chelate fertilizer: 2 kg Magnesium sulfate: 0.5 kg Sodium humate: 2 kg Trace element chelate: 0.2 kg Preparation method: Mix the above raw materials well to make uniform granular fertilizer. When applied, 3 kg is scattered per 667 m 2 and used with conventional fertilizer.

[0057] Product solubility: 5 kg of mixed fertilizer is dissolved in 100 L of water and stirred, the solution is clear, pH ≈ 6.5, EC ≈ 2.4 mS / cm. After filtration, the filtrate is clear and no suspended matter remains. After 500 times dilution, the solution is stable and no precipitate is precipitated.

[0058] Application effect: Field control test shows that after applying the granular fertilizer, the color of strawberry fruits is more bright and uniform, the fruit peel is smooth, and the soluble solid content and fruit flavor of the fruits are significantly improved. The plant growth of the treatment group is vigorous, the leaf color is dark green, the disease resistance is enhanced, and the fruit commodity rate is significantly better than that of the control group. The above results show that the granular fertilizer effectively improves the color quality and overall quality of strawberry fruits.

[0059] Those skilled in the art will understand that various modifications and changes can be made to the embodiments disclosed above without departing from the true spirit of the application. The scope of the application should therefore be limited only by the appended claims.

[0060] It should be noted that the above processes are not necessarily required to include all the steps and units, and some steps or units can be omitted according to actual needs. The execution order of each step is not fixed and can be determined as needed. The device structure described in the above embodiments can be a physical structure or a logical structure, that is, some units can be implemented by the same physical entity, or some units can be implemented by multiple physical entities, or can be implemented by some components in multiple independent devices together.

[0061] The specific implementation described above describes exemplary embodiments, but does not represent all embodiments that can be implemented or fall within the protection scope of the claims. The term "exemplary" used throughout this specification means "serving as an example, instance, or illustration", and does not mean "preferred" or "having advantages" over other embodiments. The specific implementation includes specific details for the purpose of providing an understanding of the described technology. However, these technologies can be implemented without these specific details. In some examples, to avoid causing difficulty in understanding the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0062] The above description of the present disclosure is provided to enable any person skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein can also be applied to other variations. Therefore, the present disclosure is not limited to the examples and designs described herein, but is consistent with the broadest scope of the principles and novel features disclosed herein.

Claims

1. A functional water-soluble fertilizer efficient compounding method, comprising a main body (1), characterized in that: The method comprises the following steps: S1: water quality diagnosis is performed on the water for fertilization, and parameters such as pH value, hardness, alkalinity and conductivity are measured; S2: formula requirements are set according to crop types and target functions, including the proportions of nitrogen, phosphorus and potassium, required trace elements and application pH and EC windows; S3: components are divided into A / B two barrels according to ion compatibility, wherein calcium, magnesium and other components prone to forming precipitates with phosphate and sulfate are placed in the A barrel, and phosphate, sulfate and most trace elements are placed in the B barrel; S4: a chelating agent is selected according to the pH value of the prepared mother liquor; S5: a buffer, a dispersing anti-scale agent, a wetting agent, an antifoaming agent and the like are added to the prepared solution to construct a stable system; S6: components are sequentially added in order: water and the buffer are first added, then the trace element solution and the macroelement solution are added, and then the functional additive is added, and finally the pH value and the total volume are adjusted to ensure that all components are fully dissolved; S7: dilution tests, turbidity observation, filtration tests and cold and hot cycle tests are performed on the prepared solution to evaluate the compatibility and long-term stability of the prepared system; S8: a stable functional water-soluble fertilizer mother liquor or a high-solubility granule is finally obtained.

2. The functional water-soluble fertilizer efficient compounding method according to claim 1, characterized in that: In S3, the formula components are divided into the A barrel and the B barrel according to ion compatibility, wherein the A barrel includes calcium, magnesium and other components prone to forming precipitates with phosphate and sulfate, and the B barrel includes phosphate, sulfate and most trace elements.

3. The functional water-soluble fertilizer efficient compounding method according to claim 1, characterized in that: In S4, a chelating agent is selected according to the pH value of the prepared mother liquor: when the pH value is low, an EDTA chelating agent is selected, when the pH value is moderate, a DTPA chelating agent is selected, and when the pH value is high, an EDDHA chelating agent is selected.

4. The functional water-soluble fertilizer efficient compounding method according to claim 1, characterized in that: In S6, components are sequentially added: water and the buffer are first added, then the trace element solution and the macroelement solution are added, and then the functional additive is added, and finally the pH value and the total volume are adjusted to ensure that all nutrient components are stably dissolved.

5. The functional water-soluble fertilizer efficient compounding method according to claim 1, characterized in that: In S1, the pH value, hardness, alkalinity and the like of the water for fertilization are measured and the water quality is diagnosed, and the subsequent formula is adjusted according to the water quality characteristics, for example, when the calcium and magnesium contents in the water are high, the separation measures of the A barrel are strengthened or the amount of the buffer is increased to prevent the formation of precipitates.

6. The functional water-soluble fertilizer efficient compounding method according to claim 1, characterized in that: In S2, the nutrient range of the set formula includes: the mass ratio of nitrogen, phosphorus and potassium meets the fertilizer requirement characteristics of the selected crop; and the formula contains iron, manganese, zinc, copper, boron, molybdenum and other trace elements, and the content of the trace elements is generally in the range of 0.01% to 5.0%.