A compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine and its preparation method

Abstract

This invention discloses a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine and its preparation method, comprising 80-110 parts of the mixed extract of traditional Chinese medicine, 75-100 parts of macro-elements, 2.3-4.5 parts of chelated trace elements, 18-35 parts of natural adjuvants, and an appropriate amount of deionized water; the mixed extract of traditional Chinese medicine includes: Salvia miltiorrhiza extract, pine needle extract, Forsythia suspensa extract, honeysuckle extract, Phyllanthus emblica extract, and eucalyptus leaf extract; the mass ratio of Salvia miltiorrhiza, pine needle, Forsythia suspensa, honeysuckle, Phyllanthus emblica, and eucalyptus leaf is 10-20:10-20:20-30:10-20:8-10:8-10. This invention uses a mixture of Chinese herbal extracts, macro-elements, chelated trace elements, and natural additives as raw materials. It employs an ultrasound-assisted extraction process to maximize the retention of active substances such as polyphenols, polysaccharides, and triterpenes in the extracts of pine needles, salvia miltiorrhiza, forsythia suspensa, honeysuckle, amla, and eucalyptus leaves. The preparation method is simple, convenient to operate, and suitable for large-scale production.

Description

Technical Field

[0001] This invention belongs to the field of fertilizer technology, and particularly relates to a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine and its preparation method. Background Technology

[0002] Water-soluble fertilizers, as highly efficient fertilizers that can completely dissolve in water, can precisely supply nutrients to crops through drip irrigation, sprinkler irrigation, and foliar spraying, making them a core production material for modern intensive agriculture and facility agriculture. With the increasing demands for sustainable agricultural development, and growers not only pursuing high yields but also focusing on crop health, stress resistance, agricultural product quality, and environmental friendliness, traditional water-soluble fertilizers that only provide basic nutrients such as nitrogen, phosphorus, and potassium can no longer meet market demands.

[0003] To meet market demand, biostimulants, which can promote crop growth and development through non-nutritive means and significantly improve crop growth efficiency and stress resistance, have been widely researched and applied in recent years. Currently, commercially available biostimulants mainly come from humic acids, seaweed extracts, amino acids, and microbial inoculants, and their sustainable supply is challenged by limitations imposed by specific mineral or marine resources.

[0004] Recent reports have also explored the use of plant extracts as biostimulants, but these primarily focus on fermentation broths from single plants or fruits, exhibiting limited functional targets and complex, unclear compositions. Existing technologies largely emphasize the insecticidal and bactericidal functions of traditional Chinese medicine (TCM), neglecting its immense potential as a "plant health supplement" and "biostimulant." TCM is rich in natural antioxidants such as terpenes, polyphenols, and polysaccharides, offering advantages such as safety, no residue, and strong antioxidant activity. Applying these to water-soluble fertilizers can enhance crop resilience by scavenging reactive oxygen species and activating the crop's endogenous antioxidant system. Therefore, developing a nutritionally balanced TCM water-soluble fertilizer that promotes healthy crop growth has become a pressing technical challenge. Summary of the Invention

[0005] The purpose of this invention is to provide a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine and its preparation method, aiming to provide a nutritionally balanced water-soluble fertilizer that promotes healthy crop growth.

[0006] To solve the above-mentioned technical problems, the present invention is mainly achieved through the following technical solutions:

[0007] In the first aspect, the present invention provides a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine, comprising, by weight, 80-110 parts of mixed extract of traditional Chinese medicine, 75-100 parts of macro-elements, 2.3-4.5 parts of chelated trace elements, 18-35 parts of natural adjuvants, and an appropriate amount of deionized water;

[0008] The herbal extract mixture includes: Salvia miltiorrhiza extract, pine needle extract, Forsythia suspensa extract, honeysuckle extract, Phyllanthus emblica extract, and eucalyptus leaf extract; wherein the mass ratio of Salvia miltiorrhiza, pine needle, Forsythia suspensa, honeysuckle, Phyllanthus emblica, and eucalyptus leaf is 10~20:10~20:20~30:10~20:8~10:8~10.

[0009] As a preferred embodiment, the preparation method of the mixed extract of traditional Chinese medicine is as follows:

[0010] 1) Crush the dried Salvia miltiorrhiza, pine needles, Forsythia suspensa, honeysuckle, Phyllanthus emblica, and eucalyptus leaves into powder for later use;

[0011] 2) Mix the powder prepared in step 1) with an ethanol solution with a volume fraction of 60%~75%, and the liquid-solid ratio of the mixture is (15~20):1. After stirring evenly, perform ultrasonic extraction to obtain an ultrasonic mixture.

[0012] 3) The ultrasonic mixture obtained in step 2) is subjected to solid-liquid separation. The separated liquid is concentrated to remove ethanol, thus obtaining the mixed extract of traditional Chinese medicine.

[0013] This invention relates to a water-soluble fertilizer prepared from a mixture of traditional Chinese herbal extracts, macronutrients, chelated micronutrients, and natural adjuvants. Utilizing an ultrasound-assisted extraction process, it maximizes the retention of polyphenols, polysaccharides, and triterpenes from extracts of pine needles, salvia miltiorrhiza, forsythia suspensa, honeysuckle, amla, and eucalyptus leaves. It exhibits natural antioxidant and antibacterial health benefits, effectively activating the crop's endogenous antioxidant system, enhancing crop resistance, and reducing pests and diseases. The scientifically formulated macronutrients meet the basic nutritional needs of crops at various growth stages. Chelated micronutrients improve nutrient absorption efficiency and avoid element antagonism. Natural adjuvants further promote root growth and improve crop quality. The overall composition of this compound water-soluble fertilizer aligns with the needs of green agriculture, leaving no chemical residues. It balances nutrient supply, stress resistance, and environmental friendliness. The preparation method is simple, convenient, and suitable for large-scale industrial production.

[0014] The extract of Salvia miltiorrhiza is rich in tanshinone and salvianolic acid, which can stimulate root differentiation, increase the number of white roots and make root hairs denser, and promote root water and fertilizer absorption; regulate cell osmotic pressure, have strong antioxidant properties, and scavenge free radicals; tanshinone is a natural antibacterial substance that can inhibit root rot, induce systemic resistance in crops, and reduce the occurrence of diseases.

[0015] Pine needle extract is rich in resin, volatile oil, flavonoids and tannins, and has strong antibacterial and insect-repellent effects. It can stimulate the vitality of new shoots, make leaves dark green and thick, and enhance photosynthesis. Forsythia extract and honeysuckle extract can exert antibacterial, antiviral and systemic resistance-inducing effects.

[0016] Phyllanthus emblica extract is rich in polyphenols, ellagic acid, gallic acid, flavonoids, tannins, and polysaccharides, which can scavenge free radicals, promote root and seedling growth, and enhance crop resistance and fruit quality. Eucalyptus leaf extract is rich in eucalyptus oil, eucalyptol, and phenolic substances, and has strong bactericidal properties, repelling soil nematodes and underground pests.

[0017] The extracts of various Chinese herbal medicines in this application can work synergistically to exert natural antioxidant and antibacterial effects, effectively activate the endogenous antioxidant capacity of crops, enhance the crop's stress resistance, and reduce the occurrence of diseases and pests.

[0018] In a preferred embodiment, in step 2), the ultrasonic extraction temperature is 48~62℃, the ultrasonic power is 300~500W, and the ultrasonic time is 40~65min.

[0019] Specifically, ultrasonic extraction uses a lower temperature, which can prevent heat-sensitive components from decomposing or volatilizing due to high temperatures, thus improving the yield.

[0020] As a preferred embodiment, step 3) includes: centrifuging the ultrasonic mixture obtained in step 2) to obtain supernatant and residue, repeating ultrasonic extraction of the residue 3 to 5 times and centrifuging separation, and mixing all the supernatants and placing them in a rotary evaporator for vacuum concentration to remove ethanol.

[0021] In this invention, the effective components can be fully extracted by repeated ultrasonic extraction of the residue, reducing production costs and preventing raw material waste. Compared with single extraction, it is closer to the overall nutrition and has a more comprehensive fertilizer effect. The supernatant after centrifugation is concentrated under reduced pressure using a rotary evaporator, which can quickly evaporate the solvent and concentrate the target product in the solution, thereby achieving the purification of the target product.

[0022] As a preferred embodiment, the macroelements, by weight, include: 40-55 parts of urea and 35-45 parts of potassium dihydrogen phosphate.

[0023] This invention incorporates a large amount of urea and potassium dihydrogen phosphate. Urea, a nitrogen fertilizer, can rapidly promote seedling growth, leaf development, and leaf greening and strengthening, as well as promote tillering. Potassium dihydrogen phosphate contains phosphorus and potassium, which can promote root growth and strengthening, promote robust tillering, enhance stress resistance, and lay the foundation for later jointing and heading stages. Thus, it meets the basic nutritional needs of crops at each growth stage.

[0024] As a preferred embodiment, the chelated trace elements, by weight, include: 1-2 parts of EDTA-Zn, 0.8-1.5 parts of EDTA-Fe, and 0.5-1 parts of EDTA-Mn.

[0025] This invention improves nutrient absorption efficiency by adding chelated trace elements. The chelated trace elements do not react with soil or fertilizers, have strong stability, good compatibility, and avoid element antagonism. It can supplement a variety of trace elements, making crops grow more evenly and yield more stable.

[0026] As a preferred embodiment, the natural adjuvants, by weight, include: 8-15 parts of seaweed extract and 10-20 parts of compound amino acids.

[0027] The amino acids of this invention are the basic units of proteins. They can be directly absorbed by the roots and leaves of crops without being broken down, and can stimulate root meristem growth. The compound amino acids can further promote the growth of crop roots and improve crop quality.

[0028] Furthermore, the complex amino acids include aspartic acid, threonine, serine, glutamic acid, proline, glycine, alanine, cystine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, lysine, histidine, arginine, and tryptophan.

[0029] Furthermore, seaweed extracts are substances obtained primarily from seaweed (such as kelp, kelp, giant kelp, Sargassum, wakame, Sargassum fusiforme, Schefflera arborescens, and trumpet kelp) through a water extraction-enzymatic hydrolysis method. This water extraction-enzymatic hydrolysis method is an existing technology and will not be elaborated upon here. The main component of seaweed extracts is alginic acid. Alginic acid can stimulate the elongation of the taproot and the proliferation of fibrous roots, resulting in denser root hairs and promoting water and nutrient absorption by the roots. Alginic acid can also repair cell membranes, activate growth points, and combine with chelated trace elements to form an organic chelated protective layer, improving the utilization rate of nitrogen, phosphorus, and potassium, thereby promoting crop growth and development and improving crop quality.

[0030] As a preferred embodiment, the compound water-soluble fertilizer based on the mixed extract of traditional Chinese medicine further includes:

[0031] pH adjuster, comprising: 1-2 parts citric acid and 0.5-1 part potassium hydroxide.

[0032] This invention incorporates a pH adjuster to adjust the pH of the compound water-soluble fertilizer to a slightly acidic state, which helps to delay the precipitation of trace elements, maintain their ionic state, and improve their utilization rate. At the same time, the slightly acidic state can reduce phosphorus fixation and make nitrogen more stable, which is conducive to the absorption of macroelements such as nitrogen and phosphorus. Moreover, the root systems of most crops are more vigorous and absorb nutrients faster in a slightly acidic environment. The slightly acidic properties reduce ionic bond antagonism, making the compound water-soluble fertilizer more stable and better suited for crops.

[0033] In a second aspect, the present invention provides a method for preparing a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine as described in any one of the first aspects above, comprising the following steps:

[0034] (a) Add the mixed extract of the Chinese herbal medicines into a mixing tank, add deionized water to dilute to 600-650 parts, turn on the stirrer and stir evenly;

[0035] (b) Add macro-elements, chelated micro-elements and natural additives to the mixing tank in sequence, stir until homogeneous, and obtain mixed solution one;

[0036] (c) Add deionized water to mixed solution one to a total volume of 1000 parts, stir well to obtain mixed solution two; add pH adjuster to adjust the pH of mixed solution two to 5.5~6.5;

[0037] (d) Filter the mixed solution through a 200-300 mesh filter to remove impurities and obtain the compound water-soluble fertilizer.

[0038] In a preferred embodiment, the stirring speed is 80~100 r / min.

[0039] This invention enables the materials to be mixed and dispersed more evenly through stirring.

[0040] Compared with the prior art, the present invention has the following beneficial technical effects:

[0041] This invention relates to a water-soluble fertilizer prepared from a mixture of traditional Chinese herbal extracts, macronutrients, chelated micronutrients, and natural adjuvants. Utilizing an ultrasound-assisted extraction process, it maximizes the retention of polyphenols, polysaccharides, and triterpenes from extracts of pine needles, salvia miltiorrhiza, forsythia suspensa, honeysuckle, amla, and eucalyptus leaves. It exhibits natural antioxidant and antibacterial health benefits, effectively activating the crop's endogenous antioxidant system, enhancing crop resistance, and reducing pests and diseases. The scientifically formulated macronutrients meet the basic nutritional needs of crops at various growth stages. Chelated micronutrients improve nutrient absorption efficiency and avoid element antagonism. Natural adjuvants further promote root growth and improve crop quality. The overall composition of this compound water-soluble fertilizer aligns with the needs of green agriculture, leaving no chemical residues. It balances nutrient supply, stress resistance, and environmental friendliness. The preparation method is simple, convenient, and suitable for large-scale industrial production. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a diagram illustrating the growth promotion effect on wheat seedlings in Example 1 of the present invention;

[0044] Figure 2 This is a diagram illustrating the growth promotion effect on wheat seedlings in Example 2 of the present invention;

[0045] Figure 3 This is a diagram illustrating the growth promotion effect on wheat seedlings in Example 3 of the present invention;

[0046] Figure 4 This is a diagram illustrating the growth promotion of wheat seedlings in Comparative Example 1 of the present invention;

[0047] Figure 5 This is a diagram illustrating the growth promotion of wheat seedlings in Comparative Example 2 of this invention. Detailed Implementation

[0048] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

[0049] In the first aspect, embodiments of this disclosure provide a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine, comprising 80-110 parts of the mixed extract of traditional Chinese medicine, 75-100 parts of macro-elements, 2.3-4.5 parts of chelated trace elements, 18-35 parts of natural additives, and an appropriate amount of deionized water;

[0050] The herbal extract mixture includes: Salvia miltiorrhiza extract, pine needle extract, Forsythia suspensa extract, honeysuckle extract, Phyllanthus emblica extract, and eucalyptus leaf extract; wherein the mass ratio of Salvia miltiorrhiza, pine needle, Forsythia suspensa, honeysuckle, Phyllanthus emblica, and eucalyptus leaf is 10~20:10~20:20~30:10~20:8~10:8~10.

[0051] Specifically, the active ingredients and their contents of the traditional Chinese medicinal herbs Danshen, pine needles, forsythia, honeysuckle, amla, and eucalyptus leaves are shown in Table 1 below:

[0052] Table 1. Active ingredients and content of the Chinese herbal medicines used.

[0053]

[0054] The antioxidant capacities of the traditional Chinese medicinal herbs Salvia miltiorrhiza, pine needles, Forsythia suspensa, Lonicera japonica, Phyllanthus emblica, and Eucalyptus leaves were assessed using three indicators: DPPH free radical scavenging rate, ABTS free radical scavenging rate, and FRAP iron ion reducing capacity. See Table 2 below.

[0055] Table 2 shows the antioxidant capacity indicators of the Chinese herbal medicines used.

[0056]

[0057] As a preferred embodiment, the preparation method of the mixed extract of traditional Chinese medicine is as follows:

[0058] 1) Crush the dried Salvia miltiorrhiza, pine needles, Forsythia suspensa, honeysuckle, Phyllanthus emblica, and eucalyptus leaves into powder for later use;

[0059] 2) Mix the powder prepared in step 1) with an ethanol solution with a volume fraction of 60%~75%, and the liquid-solid ratio of the mixture is (15~20):1. After stirring evenly, perform ultrasonic extraction to obtain an ultrasonic mixture.

[0060] 3) The ultrasonic mixture obtained in step 2) is subjected to solid-liquid separation. The separated liquid is concentrated to remove ethanol, thus obtaining the mixed extract of traditional Chinese medicine.

[0061] In a preferred embodiment, in step 2), the ultrasonic extraction temperature is 48~62℃, the ultrasonic power is 300~500W, and the ultrasonic time is 40~65min.

[0062] As a preferred embodiment, step 3) includes: centrifuging the ultrasonic mixture obtained in step 2) to obtain supernatant and residue, repeating ultrasonic extraction of the residue 3 to 5 times and centrifuging separation, and mixing all the supernatants and placing them in a rotary evaporator for vacuum concentration to remove ethanol.

[0063] As a preferred embodiment, the macroelements, by weight, include: 40-55 parts of urea and 35-45 parts of potassium dihydrogen phosphate.

[0064] As a preferred embodiment, the chelated trace elements, by weight, include: 1-2 parts of EDTA-Zn, 0.8-1.5 parts of EDTA-Fe, and 0.5-1 parts of EDTA-Mn.

[0065] As a preferred embodiment, the natural adjuvants, by weight, include: 8-15 parts of seaweed extract and 10-20 parts of compound amino acids.

[0066] As a preferred embodiment, the compound water-soluble fertilizer based on the mixed extract of traditional Chinese medicine further includes:

[0067] pH adjuster, comprising: 1-2 parts citric acid and 0.5-1 part potassium hydroxide.

[0068] In a second aspect, the present invention provides a method for preparing a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine as described in any one of the first aspects above, comprising the following steps:

[0069] (a) Add the mixed extract of the Chinese herbal medicines into a mixing tank, add deionized water to dilute to 600-650 parts, turn on the stirrer and stir evenly;

[0070] (b) Add macro-elements, chelated micro-elements and natural additives to the mixing tank in sequence, stir until homogeneous, and obtain mixed solution one;

[0071] (c) Add deionized water to mixed solution one to a total volume of 1000 parts, stir well to obtain mixed solution two; add pH adjuster to adjust the pH of mixed solution two to 5.5~6.5;

[0072] (d) Filter the mixed solution through a 200-300 mesh filter to remove impurities and obtain the compound water-soluble fertilizer.

[0073] In a preferred embodiment, the stirring speed is 80~100 r / min.

[0074] Example 1:

[0075] (1) Dry and pulverize the following ingredients: Salvia miltiorrhiza, pine needles, Forsythia suspensa, Phyllanthus emblica, Lonicera japonica, and Eucalyptus leaves. Weigh out 10g of dried Salvia miltiorrhiza powder, 20g of pine needle powder, 30g of Forsythia suspensa powder, 10g of Phyllanthus emblica powder, 8g of Lonicera japonica powder, and 10g of Eucalyptus leaves powder, and place them in a reaction beaker. Prepare a 60% ethanol aqueous solution and add it to each of the raw material powders at a liquid-to-solid ratio of 20:1, and stir evenly. Place the mixture in an ultrasonic device, set the temperature to 48℃, the ultrasonic power to 300 W, and extract for 40 min to obtain an ultrasonic mixture.

[0076] (2) After centrifuging the ultrasonic mixture, take the supernatant and residue; repeat the above ultrasonication 3 times on the residue and centrifuge it. Mix all the supernatants and place them in a rotary evaporator. Concentrate under reduced pressure at 60°C to remove ethanol and obtain the mixed extract of Chinese herbal medicine.

[0077] (3) Take 80 parts of the mixed extract of Chinese herbal medicines and pour it into a mixing tank. Add deionized water to dilute to 600 parts. Turn on the stirrer and stir at 80 r / min for 10 min. Add 40 parts of urea, 35 parts of potassium dihydrogen phosphate, 0.8 parts of EDTA-Fe, 1.0 parts of EDTA-Zn, 0.5 parts of EDTA-Mn, 10 parts of compound amino acids and 8 parts of seaweed extract in sequence. Add the next one after each one is completely dissolved to ensure that the solution is completely dispersed and there is no clumping. Continue to stir evenly to obtain mixed solution one.

[0078] (4) Add deionized water to mixed solution one to 1000 parts, and continue stirring for 20 min to obtain mixed solution two; use a precision pH meter to measure the pH, and add citric acid or dilute potassium hydroxide solution to adjust the pH value to 5.5~6.5; filter mixed solution two through a 200 mesh filter, and collect the filtrate as compound water-soluble fertilizer.

[0079] Example 2:

[0080] (1) Dry and pulverize the following ingredients: Salvia miltiorrhiza, pine needles, Forsythia suspensa, Phyllanthus emblica, Lonicera japonica, and Eucalyptus leaves. Weigh out 20g of dried Salvia miltiorrhiza powder, 10g of dried pine needle powder, 20g of dried Forsythia suspensa powder, 20g of dried Phyllanthus emblica powder, 10g of dried Lonicera japonica powder, and 8g of dried Eucalyptus leaves powder, and place them in a reaction beaker. Prepare a 75% ethanol aqueous solution and add it to each of the raw material powders at a liquid-to-solid ratio of 15:1, and stir evenly. Place the mixture in an ultrasonic device, set the temperature to 62℃, the ultrasonic power to 500 W, and extract for 65 min to obtain an ultrasonic mixture.

[0081] (2) After centrifuging the ultrasonic mixture, take the supernatant and residue; repeat the above ultrasonic treatment 5 times on the residue and centrifuge it. Mix all the supernatants and place them in a rotary evaporator. Concentrate under reduced pressure at 60°C to remove ethanol and obtain the mixed extract of Chinese herbal medicine.

[0082] (3) Take 110 parts of the mixed extract of Chinese herbal medicines and pour it into a mixing tank. Add deionized water to dilute to 650 parts. Turn on the stirrer and stir at 100 r / min for 10 min. Add 55 parts of urea, 45 parts of potassium dihydrogen phosphate, 1.5 parts of EDTA-Fe, 2 parts of EDTA-Zn, 1 part of EDTA-Mn, 20 parts of compound amino acids and 15 parts of seaweed extract in sequence. Add the next one after each one is completely dissolved to ensure that the solution is completely dispersed and there is no clumping. Continue to stir evenly to obtain mixed solution one.

[0083] (4) Add deionized water to mixed solution one to 1000 parts, and continue stirring for 20 min to obtain mixed solution two; use a precision pH meter to measure the pH, and add citric acid or dilute potassium hydroxide solution to adjust the pH value to 5.5~6.5; filter mixed solution two through a 300 mesh filter, and collect the filtrate as compound water-soluble fertilizer.

[0084] Example 3:

[0085] (1) Dry and pulverize the following ingredients: Salvia miltiorrhiza, pine needles, Forsythia suspensa, Phyllanthus emblica, Lonicera japonica, and Eucalyptus leaves. Weigh out 15g of dried Salvia miltiorrhiza powder, 15g of pine needle powder, 25g of Forsythia suspensa powder, 15g of Phyllanthus emblica powder, 9g of Lonicera japonica powder, and 9g of Eucalyptus leaves powder, and place them in a reaction beaker. Prepare a 70% ethanol aqueous solution and add it to each of the raw material powders at a liquid-to-solid ratio of 18:1, and stir evenly. Place the mixture in an ultrasonic device, set the temperature to 55℃, the ultrasonic power to 500 W, and extract for 60 min to obtain an ultrasonic mixture.

[0086] (2) After centrifuging the ultrasonic mixture, take the supernatant and residue; repeat the ultrasonic treatment on the residue 4 times and centrifuge it. Mix all the supernatants and place them in a rotary evaporator. Concentrate under reduced pressure at 60°C to remove ethanol and obtain the mixed extract of Chinese herbal medicine.

[0087] (3) Take 90 parts of the mixed extract of Chinese herbal medicines and pour it into a mixing tank. Add deionized water to dilute to 650 parts. Turn on the stirrer and stir at 90 r / min for 10 min. Add 50 parts of urea, 40 parts of potassium dihydrogen phosphate, 1.0 part of EDTA-Fe, 1.5 parts of EDTA-Zn, 0.8 parts of EDTA-Mn, 15 parts of compound amino acids and 10 parts of seaweed extract in sequence. Add the next one after each one is completely dissolved to ensure that the solution is completely dispersed and there is no clumping. Continue to stir evenly to obtain mixed solution one.

[0088] (4) Add deionized water to mixed solution one to 1000 parts, and continue stirring for 20 min to obtain mixed solution two; use a precision pH meter to measure the pH, and add citric acid or dilute potassium hydroxide solution to adjust the pH to 5.5~6.5; filter mixed solution two through a 250 mesh filter, and collect the filtrate as compound water-soluble fertilizer.

[0089] Comparative Example 1: Deionized water;

[0090] Comparative Example 2: The difference from Example 1 is that no mixed extract of Chinese herbal medicines was added.

[0091] Experiment 1: The compound water-soluble fertilizers prepared in Examples 1, 2, and 3 were tested, and the results are shown in Table 2 below:

[0092] Table 2. Indicators of Compound Water-Soluble Fertilizers in Examples 1-3

[0093]

[0094] As can be seen from Table 2, the compound water-soluble fertilizers prepared in Examples 1-3 all exhibited relatively stable appearances. The extract was purified by centrifugation, dissolved stepwise during compounding, and filtered as a finished product, ensuring triple protection. The content of water-insoluble matter was all below 0.5%, and the pH value was all controlled within the range of 5.5-6.5, which is suitable for the root growth environment of most crops and avoids fertilizer damage.

[0095] Experiment 2: Experiment on Promoting the Growth of Wheat Seedlings

[0096] Select plump, undamaged, and disease-free wheat seeds. After rinsing with deionized water and disinfecting with 5% sodium hypochlorite, place them in moist filter paper petri dishes at 25°C in the dark to germinate. Rinse with deionized water once a day. When the seedlings grow to 1-2 cm and are of uniform growth, they are ready for use. Divide the culture cups into 5 groups, with 2 cups in each group. Label each cup with the group. Then prepare the treatment solutions. Dilute the four portions of water-soluble fertilizer obtained from Examples 1-3 and Comparative Example 2 of this invention by 1000 times. Make up the volume of all treatment solutions to 2L and adjust the pH to 5.5-6.5 to ensure that there is no turbidity or precipitation before use.

[0097] Wheat seedlings of uniform growth (1-2 cm) were rinsed with deionized water to clean their roots. After draining the surface water, 4 seedlings per cup were transplanted into the labeled culture cups, ensuring the roots were spread out and the plants were evenly spaced. The corresponding treatment solution was then added to each group of culture cups, ensuring the roots were completely submerged. The amount of treatment solution used for each group was strictly controlled at 2L. The root-immersion method was used for treatment. All culture cups were placed in a constant temperature incubator at 25℃ with 12 hours of light / 12 hours of darkness, and incubated for 5 days. During the incubation period, the seedling growth was observed daily, and the corresponding treatment solution was added as needed to maintain the liquid level and ensure the roots were always submerged, avoiding temperature and light fluctuations and contamination. After 5 days, the total root length, number of root tips, root fresh weight, and aboveground fresh weight of each of the five groups of wheat seedlings were measured. Measurements were taken from 4 seedlings per cup, and the average value of 2 cups per group was used as the final experimental data. Detailed records were kept (see Table 3). The growth status of the wheat after five days of treatment is as follows: Figures 1 to 5 As shown.

[0098] Table 3 shows the growth indicators of wheat seedlings corresponding to Examples 1-3 and Comparative Examples 1-2.

[0099]

[0100] As shown in Table 3, the total root length of Examples 1-3, which applied the compound water-soluble fertilizer of the present invention, was 79.74-82.59 cm, significantly higher than that of Comparative Examples 1 and 2 (70.34 cm and 78.13 cm, respectively). The number of root tips in Examples 1-3, which applied the compound water-soluble fertilizer of the present invention, was 62.3-66.5, significantly higher than that of Comparative Examples 1 and 2 (34.5 and 63.7, respectively). The fresh root weight of Examples 1-3, which applied the compound water-soluble fertilizer of the present invention, was 0.70-0.73 g / plant, significantly higher than that of Comparative Examples 1 and 2 (0.61 g / plant and 0.68 g / plant, respectively). The fresh aboveground part weight of Examples 1-3, which applied the compound water-soluble fertilizer of the present invention, was 0.40-0.43 g / plant, significantly higher than that of Comparative Examples 1 and 2 (0.36 g / plant and 0.42 g / plant, respectively). Therefore, the compound water-soluble fertilizer based on the mixed extract of traditional Chinese medicine can effectively promote the root growth of wheat seedlings, increase the number of root tips, and improve the overall growth of seedlings.

[0101] Compared with existing technologies, this invention uses a mixed extract of traditional Chinese medicine, macronutrients, chelated micronutrients, and natural adjuvants as raw materials to prepare a water-soluble fertilizer. Employing an ultrasound-assisted extraction process, it maximizes the retention of active substances such as polyphenols, polysaccharides, and triterpenes in the extracts of pine needles, salvia miltiorrhiza, forsythia suspensa, honeysuckle, amla, and eucalyptus leaves. It can exert natural antioxidant and antibacterial health benefits, effectively activating the crop's endogenous antioxidant system, enhancing crop stress resistance, and reducing the occurrence of pests and diseases. Through a scientifically formulated combination of macronutrients, it can meet the basic nutritional needs of crops at various growth stages. Chelated micronutrients can improve nutrient absorption efficiency and avoid element antagonism. Natural adjuvants can further promote crop root growth and improve crop quality. The overall composition of this invention's compound water-soluble fertilizer better meets the needs of green agricultural development, has no chemical residues, and balances nutrient supply, stress resistance protection, and environmental friendliness. The preparation method is simple, convenient to operate, and suitable for large-scale industrial production.

[0102] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0103] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicinal herbs, characterized in that, By weight, it includes 80-110 parts of mixed extract of Chinese herbal medicines, 75-100 parts of macro-elements, 2.3-4.5 parts of chelated trace elements, 18-35 parts of natural adjuvants, and an appropriate amount of deionized water; The herbal extract mixture includes: Salvia miltiorrhiza extract, pine needle extract, Forsythia suspensa extract, honeysuckle extract, Phyllanthus emblica extract, and eucalyptus leaf extract; wherein the mass ratio of Salvia miltiorrhiza, pine needle, Forsythia suspensa, honeysuckle, Phyllanthus emblica, and eucalyptus leaf is 10~20:10~20:20~30:10~20:8~10:8~10.

2. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 1, characterized in that, The preparation method of the mixed extract of traditional Chinese medicine is as follows: 1) Crush the dried Salvia miltiorrhiza, pine needles, Forsythia suspensa, honeysuckle, Phyllanthus emblica, and eucalyptus leaves into powder for later use; 2) Mix the powder prepared in step 1) with an ethanol solution with a volume fraction of 60%~75%, and the liquid-solid ratio of the mixture is (15~20):

1. After stirring evenly, perform ultrasonic extraction to obtain an ultrasonic mixture. 3) Perform solid-liquid separation on the ultrasonic mixture obtained in step 2), concentrate the separated liquid to remove ethanol, and obtain the mixed extract of traditional Chinese medicine.

3. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 2, characterized in that, In step 2), the ultrasonic extraction temperature is 48~62℃, the ultrasonic power is 300~500W, and the ultrasonic time is 40~65min.

4. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 2, characterized in that, Step 3) includes: centrifuging the ultrasonic mixture obtained in step 2) to obtain supernatant and residue, repeating ultrasonic extraction of the residue 3 to 5 times and centrifuging separation, mixing all the supernatant and placing it in a rotary evaporator for vacuum concentration to remove ethanol.

5. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 1, characterized in that, By weight, the macroelements include: 40-55 parts urea and 35-45 parts potassium dihydrogen phosphate.

6. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 1, characterized in that, By weight, the chelated trace elements include: 1-2 parts of EDTA-Zn, 0.8-1.5 parts of EDTA-Fe, and 0.5-1 parts of EDTA-Mn.

7. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 1, characterized in that, By weight, the natural additives include: 8-15 parts of seaweed extract and 10-20 parts of compound amino acids.

8. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 1, characterized in that, The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine also includes: pH adjuster, comprising: 1-2 parts citric acid and 0.5-1 part potassium hydroxide.

9. A method for preparing a compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine as described in any one of claims 1 to 8, characterized in that, Includes the following steps: (a) Add the mixed extract of the Chinese herbal medicines into a mixing tank, add deionized water to dilute to 600-650 parts, turn on the stirrer and stir evenly; (b) Add macro-elements, chelated micro-elements and natural additives to the mixing tank in sequence, stir until homogeneous, and obtain mixed solution one; (c) Add deionized water to mixed solution one to a total volume of 1000 parts, stir well to obtain mixed solution two; add pH adjuster to adjust the pH of mixed solution two to 5.5~6.5; (d) Filter the mixed solution through a 200-300 mesh filter to remove impurities and obtain the compound water-soluble fertilizer.

10. The compound water-soluble fertilizer based on a mixed extract of traditional Chinese medicine according to claim 9, characterized in that, The stirring speed is 80~100 r / min.

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