Plant nutrient solution for potted flowers and preparation process of plant nutrient solution

Abstract

The invention relates to the technical field of plant nutrient solutions, in particular to a plant nutrient solution for potted flowers and a preparation process of the plant nutrient solution. The preparation process of the plant nutrient solution comprises the following steps: preparing an oxidized alginic acid-lysine compound; preparing a thiophanate methyl sodium salt derivative; preparing a silver ion alkaloid compound; and preparing the plant nutrient solution for potted flowers. Alginic acid is subjected to oxidation ring opening through periodate to form oxidized alginic acid, a large number of high-activity aldehyde groups are exposed on a molecular chain of the oxidized alginic acid, the aldehyde groups and amino groups of lysine are subjected to a reductive amination reaction, and the oxidized alginic acid-lysine compound is formed through covalent bonding. Metal cation trace elements in the nutrient solution are stably carried through chelation to form small organic molecule chelates which are prevented from being fixed by soil, so that the small organic molecule chelates are more easily absorbed by root systems and efficiently transported in plant bodies, and continuous stimulation and nutrient supply are realized, so that the biological regulation functions of promoting growth and improving stress resistance can be played in a long-time and slow-release manner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plant nutrient solution, in particular to a plant nutrient solution for potted landscape flowers and a preparation process thereof. BACKGROUND

[0002] As a high value-added ornamental crop, the growth quality of potted landscape flowers is deeply affected by multiple factors such as nutrient management, environmental stress and disease invasion, and the traditional maintenance method usually combines separate fertilization and regular pesticide spraying.

[0003] In the prior art, humic acid is often obtained by composting agricultural waste such as corn or animal manure, or organic acid substances such as alginic acid obtained by processing marine plants, which are often added to plant nutrient solution as growth promoters. However, humic acid or alginic acid as a growth promoter is generally added to the plant nutrient solution by physical mixing or coated in the form of hydrogel. The function achieved by physical mixing is relatively single, and the hydrogel form has a certain slow-release ability, but the combination with trace elements is weak, and cannot achieve stable and slow-release synergistic supply effect.

[0004] In addition, the trace metal elements in the conventional nutrient solution are prone to fixation or precipitation in the substrate, or are oxidized and inactivated, resulting in low absorption efficiency of plant roots and easy occurrence of nutrient deficiency symptoms. Secondly, although common biological stimulants such as amino acids can promote growth, they have poor stability in nutrient solution and are easily decomposed by microorganisms, making it difficult to play a role for a long time. Moreover, when coexisting with some inorganic salt ions, they are prone to flocculation and precipitation, resulting in uneven distribution and blocking the drip irrigation system, affecting the absorption effect. In order to solve the absorption problem of trace elements, the prior art often uses EDTA as a chelating agent to chelate with metal elements, thereby increasing the amount of metal elements directly absorbed by plants. However, these synthetic chelating agents have high cost and are difficult to degrade in the environment, posing an ecological accumulation risk, and they do not have biological stimulation function.

[0005] Therefore, the present application provides a plant nutrient solution for potted landscape flowers and a preparation process thereof to solve the problems existing in the prior art. SUMMARY

[0006] In view of the deficiencies in the prior art, the present application aims to provide a plant nutrient solution for potted landscape flowers and a preparation process thereof.

[0007] A plant nutrient solution for potted landscape flowers, comprising the following raw materials in mass percentage: 30-35% by mass of oxidized alginic acid-lysine complex, 0.05-0.1% of methylthiophanate sodium salt derivative, 0.1-0.2% of silver ion alkaloid complex, 3-5% of potassium dihydrogen phosphate, 1-2% of metal ion trace elements, 0.1-0.3% of Tween 80 and deionized water to make up the balance.

[0008] A preparation process of a plant nutrient solution for potted landscape flowers, wherein the preparation of the oxidized alginic acid-lysine complex comprises the following steps: 5-8 parts by mass of alginic acid is dissolved in 200-210 parts by mass of deionized water, 50-55 parts by mass of ethanol is added, stirred until completely dissolved, 2-3 parts by mass of NaIO4 is added, stirred and dissolved, the reaction system is protected by nitrogen, stirred at room temperature for 24-25 hours under light-proof condition, after the reaction is completed, 10-15 parts by mass of ethylene glycol is added, stirred for 30-35 minutes to completely consume the remaining NaIO4, NaCl is added to the reaction solution until saturation, slowly poured into 3 times the volume of ethanol, the precipitate is collected by centrifugation, the precipitation is repeated for 3 times, dialyzed for 5 days, and freeze-dried to obtain oxidized alginic acid powder; 3-5 parts by mass of oxidized alginic acid powder is dissolved in 200-210 parts by mass of deionized water, stirred until clear, 2-5 parts by mass of lysine is added, the pH is adjusted to 5-6, pre-reacted at room temperature for 1-1.5 hours, 0.5-1 parts by mass of NaCNBH3 is added, stirred at room temperature for 24-25 hours under light-proof condition, after the reaction is completed, ethanol is added to a final concentration of 70-75%, the precipitate is collected by centrifugation, dialyzed for 5 days to remove unreacted lysine and by-products, and freeze-dried to obtain oxidized alginic acid-lysine complex.

[0009] Further, the preparation of the methylthiophanate sodium salt derivative comprises the following steps: Methylthiophanate is dissolved in an ethanol-water mixed solvent at a mass ratio of 1:4-5, stirred until completely dispersed, NaOH solution is added, the temperature is controlled at 50-60°C, the pH is adjusted to 10-11, and the stirring is continued for 4-6 hours, ethanol is removed by distillation under reduced pressure, and solid is precipitated after cooling, which is filtered and washed with cold water to obtain a crude sodium carboxylate derivative, the crude sodium carboxylate derivative is dissolved by heating with hot water at 60-65°C, recrystallized after cooling, and dried to obtain the methylthiophanate sodium salt derivative.

[0010] Further, the preparation of the silver ion alkaloid complex comprises the following steps: Deionized water is added to a reaction kettle, hydrogen peroxide and electrolytic silver ion solution are sequentially added, the electrolytic silver ion solution is prepared by using the oxidation-reduction reaction in the electrolysis process to make silver atoms lose electrons to form Ag +, and then dispersed in water to form a uniform ionic solution; the temperature is controlled at 25-30 DEG C, the stirring speed is 800-1000 r / min, and the stirring time is 30-35 min; then 2-5% of the cationic surfactant by mass of the content of the reaction kettle is added, and the stirring is maintained for 30-35 min; then 30-35% of the isoquinoline alkaloid by mass of the content of the reaction kettle is added, the temperature is controlled at 27-33 DEG C, the stirring is performed for 40-45 min, and the standing time is 20-35 min; and then the silver ion-alkaloid complex is obtained by filtering through a microporous filter.

[0011] Further, the mass ratio of ethanol to water in the ethanol-water mixed solvent is 1:4-5.

[0012] Further, the concentration of the NaOH solution is 10-15 wt%.

[0013] Further, the volume ratio of the deionized water, hydrogen peroxide and electrolytic silver ion solution is 5:2:(0.5-1).

[0014] Further, the cationic surfactant is specifically hexadecyl trimethyl ammonium bromide.

[0015] Further, the isoquinoline alkaloid is one of berberine, papaverine and jatrorrhizine, and the pore size of the microporous filter is 0.22 mu m.

[0016] Compared with the prior art, the present application has at least the following beneficial effects: 1. In the present application, alginic acid is oxidized by periodate to form oxidized alginic acid, and a large number of highly active aldehyde groups are exposed on the molecular chain of the oxidized alginic acid; the aldehyde groups are subjected to reductive amination with the amino groups of lysine, and a stable oxidized alginic acid-lysine complex with aldehyde groups is formed through covalent bonding; the alginic acid skeleton serves as an excellent natural biological stimulant and an organic carrier, and can promote the development of plant root systems and open cell absorption channels; and the covalently bonded lysine stably carries metal cation trace elements in the nutrient solution through chelation, forms an organic small molecule chelate, avoids being fixed by soil, and is more easily absorbed by root systems and transported in the plant body, so that sustained stimulation and nutrient supply are realized, the stability of the complex is ensured by the covalent bond, the complex is not easily rapidly decomposed by microorganisms, and the biological regulation function of promoting growth and improving stress resistance can be exerted for a long time and in a slow-release manner.

[0017] 2. In this invention, methyl thiophanate is dissolved in an ethanol-water mixture and then NaOH solution is added. This causes a hydrolytic ring-opening reaction, generating a highly water-soluble sodium methyl thiophanate derivative. The originally hydrophobic methyl thiophanate molecule is structurally destroyed under alkaline conditions, transforming into a hydrophilic sodium salt form. This allows it to be uniformly and stably dispersed in the nutrient solution, completely avoiding problems such as precipitation and uneven leaf adhesion caused by the hydrophobicity of the agent. When plants absorb the nutrient solution through root irrigation or foliar spraying, the high water solubility of the sodium salt derivative ensures that the agent is efficiently and rapidly transported throughout the plant via water and nutrients in the vascular bundles. This provides protection against diseases such as powdery mildew and mosaic virus in ornamental flowers. By chemically modifying the physicochemical properties of methyl thiophanate, both uniformity and absorbability of the solution are achieved. This systematically enhances the plant's disease resistance while supplying nutrients, ensuring healthy crop growth and achieving a synergistic effect of fungicide and nutrient supply.

[0018] 3. This invention prepares a silver ion alkaloid complex by premixing silver ions with hydrogen peroxide and then combining it with isoquinoline alkaloids. The silver-catalyzed hydrogen peroxide system can generate more aggressive hydroxyl radicals. The subsequently added isoquinoline alkaloids can act as electron donors and coordinate with silver ions, forming a stable silver-alkaloid coordination complex. This complex changes the physicochemical properties of the single component, thus creating a hydroxyl radical / silver-alkaloid coordination complex antibacterial system. Its bactericidal and bacteriostatic mechanism includes physical membrane disruption and free radical attack, which can effectively prevent soil-borne diseases around the rhizosphere and leaf diseases of bonsai flowers, reducing the risk of plant diseases in bonsai flowers. Attached Figure Description

[0019] Figure 1 This is a flowchart of the preparation process according to an embodiment of the present invention. Detailed Implementation

[0020] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0021] Example 1: A process for preparing a plant nutrient solution for bonsai flowers, such as... Figure 1 As shown, it includes the following steps: S1: Preparation of oxidized alginate-lysine complex 5 parts of alginic acid by mass was dissolved in 200 parts of deionized water, 50 parts of ethanol was added, mixed and stirred until completely dissolved, 2 parts of NaIO4 was added, stirred and dissolved, the reaction system was protected by nitrogen, stirred at room temperature for 24 hours under dark condition, after the reaction was completed, 10 parts of ethylene glycol was added, stirred for 30 minutes to completely consume the remaining NaIO4, NaCl was added to the reaction solution until saturation, slowly poured into 3 times the volume of ethanol, centrifuged to collect the precipitate, repeated precipitation for 3 times, dialyzed for 5 days, and freeze-dried to obtain an oxidized alginic acid powder; 3 parts of oxidized alginic acid powder by mass was dissolved in 200 parts of deionized water, stirred until clear, 2 parts of lysine was added, the pH was adjusted to 5, pre-reacted at room temperature for 1 hour, then 0.5 parts of NaCNBH3 was added, stirred at room temperature for 24 hours in the dark, after the reaction was completed, ethanol was added to a final concentration of 70%, the precipitate was collected by centrifugation, dialyzed for 5 days to remove unreacted lysine and by-products, and freeze-dried to obtain an oxidized alginic acid-lysine complex.

[0022] S2: Preparation of methylthiophanate sodium salt derivative Methylthiophanate was dissolved in an ethanol-water mixed solvent at a mass ratio of 1:4, stirred until completely dispersed, a 10wt% NaOH solution was added, the temperature was controlled at 50°C, the pH was adjusted to 10, and the stirring was continued for 4 hours. Ethanol was removed by distillation under reduced pressure, and a solid was precipitated after cooling. The solid was filtered and washed with cold water to obtain a crude sodium carboxylate derivative. The crude sodium carboxylate derivative was dissolved in hot water at 60°C, recrystallized after cooling, and dried to obtain a methylthiophanate sodium salt derivative. In the ethanol-water mixed solvent, the mass ratio of ethanol to water is 1:4.

[0023] S3: Preparation of silver ion alkaloid complex Deionized water was added to the reaction kettle, followed by hydrogen peroxide and electrolytic silver ion solution. The electrolytic silver ion solution was prepared by using the oxidation-reduction reaction in the electrolysis process to make silver atoms lose electrons to form Ag⁺, which was then dispersed in water to form a uniform ionic solution. The volume ratio of deionized water, hydrogen peroxide and electrolytic silver ion solution was 5:2:0.5. The temperature was controlled at 25°C, the stirring speed was 800r / min, and the stirring was continued for 30 minutes. Cationic surfactant cetyltrimethylammonium bromide was added to the reaction kettle content at a mass fraction of 2%, and the stirring was continued for 30 minutes. Berberine was then added to the reaction kettle content at a mass fraction of 30%, and the temperature was controlled at 27°C. The stirring was continued for 40 minutes, and the mixture was allowed to stand for 20 minutes for maturation. The silver ion alkaloid complex was obtained by filtering through a 0.22μm microporous filter.

[0024] S4: Preparation of plant nutrient solution for bonsai flowers A plant nutrient solution for potted landscape flowers and a preparation process thereof are provided, which are prepared by mixing 30% of oxidized alginate-lysine complex, 0.05% of methylthiophanate sodium salt derivative, 0.1% of silver ion alkaloid complex, 3% of potassium dihydrogen phosphate, 1% of metal ion trace elements, 0.1% of Tween 80 and deionized water in mass percentage, wherein the metal ion trace elements are a combination of iron, zinc, manganese and molybdenum.

[0025] Embodiment 2: A plant nutrient solution for potted landscape flowers and a preparation process thereof are provided, which are prepared by mixing 30% of oxidized alginate-lysine complex, 0.05% of methylthiophanate sodium salt derivative, 0.1% of silver ion alkaloid complex, 3% of potassium dihydrogen phosphate, 1% of metal ion trace elements, 0.1% of Tween 80 and deionized water in mass percentage, wherein the metal ion trace elements are a combination of iron, zinc, manganese and molybdenum. Figure 1 The preparation process comprises the following steps: S1: preparing oxidized alginate-lysine complex 5 parts of alginate is dissolved in 200 parts of deionized water, 50 parts of ethanol is added, mixed and stirred until completely dissolved, 2 parts of NaIO4 is added, stirred and dissolved, the reaction system is protected by nitrogen, stirred at room temperature for 25 hours under dark condition, after the reaction is completed, 10 parts of ethylene glycol is added, stirred for 35 minutes to completely consume the remaining NaIO4, NaCl is added to the reaction solution until saturation, slowly poured into 3 times volume of ethanol, the precipitate is collected by centrifugation, the precipitation is repeated for 3 times, dialysis is performed for 5 days, and the oxidized alginate powder is obtained by freeze-drying. 3 parts of oxidized alginate powder is dissolved in 200 parts of deionized water, stirred until clear, 2 parts of lysine is added, the pH is adjusted to 6, pre-reacted at room temperature for 1.5 hours, 0.5 parts of NaCNBH3 is added, stirred at room temperature for 25 hours under dark condition, after the reaction is completed, ethanol is added to a final concentration of 70%, the precipitate is collected by centrifugation, dialysis is performed for 5 days to remove unreacted lysine and by-products, and the oxidized alginate-lysine complex is obtained by freeze-drying.

[0026] S2: preparing methylthiophanate sodium salt derivative Methylthiophanate is dissolved in ethanol-water mixed solvent at a mass ratio of 1:4, stirred until completely dispersed, 10wt% NaOH solution is added, the temperature is controlled at 60°C, the pH is adjusted to 11, and the stirring is continued for 6 hours, ethanol is removed by reduced pressure distillation, solid is precipitated after cooling, filtered and washed with cold water to obtain carboxylate sodium derivative crude product, the carboxylate sodium derivative crude product is dissolved by heating with 65°C hot water, recrystallized after cooling, dried to obtain methylthiophanate sodium salt derivative. The mass ratio of ethanol and water in the ethanol-water mixed solvent is 1:4.

[0027] S3: preparing silver ion alkaloid complex Deionized water is added to the reaction kettle, and hydrogen peroxide and electrolytic silver ion solution are sequentially added. The electrolytic silver ion solution is prepared by using the oxidation-reduction reaction in the electrolysis process to make silver atoms lose electrons to form Ag⁺, which is then dispersed in water to form a uniform ionic solution. The volume ratio of deionized water, hydrogen peroxide, and electrolytic silver ion solution is 5:2:0.5. The temperature is controlled at 30°C, the stirring speed is 1000 r / min, and stirring is performed for 35 min. Then, 2% of cationic surfactant hexadecyl trimethyl ammonium bromide by mass of the content of the reaction kettle is added, and stirring is maintained for 35 min. Then, 30% of berberine by mass of the content of the reaction kettle is added, the temperature is controlled at 33°C, and stirring is performed for 45 min. After standing for 35 min, filtration is performed through a 0.22 μm microporous filter to obtain a silver ion alkaloid complex.

[0028] S4: Preparation of a plant nutrient solution for bonsai flowers A plant nutrient solution for bonsai flowers is prepared by mixing 30% of an oxidized alginic acid-lysine complex, 0.05% of a methyl thiophanate sodium salt derivative, 0.1% of a silver ion alkaloid complex, 3% of potassium dihydrogen phosphate, 1% of metal ion trace elements, 0.1% of Tween 80, and deionized water in the remaining amount, wherein the metal ion trace elements are a combination of iron, zinc, manganese, and molybdenum.

[0029] Example 3: A plant nutrient solution for bonsai flowers and a preparation process thereof, as shown in Figure 1 The preparation process comprises the following steps: S1: Preparation of an oxidized alginic acid-lysine complex 8 parts by mass of alginic acid are dissolved in 210 parts by mass of deionized water, 55 parts by mass of ethanol are added, and stirring is performed until complete dissolution. Then, 3 parts by mass of NaIO4 are added and dissolved by stirring. The reaction system is protected by nitrogen gas, and stirring is performed at room temperature for 24 h under dark conditions. After the reaction is completed, 15 parts by mass of ethylene glycol are added and stirred for 30 min to completely consume the remaining NaIO4. NaCl is added to the reaction solution until saturation, and then the solution is slowly poured into 3 times the volume of ethanol. The precipitate is collected by centrifugation, and the precipitation process is repeated 3 times. The precipitate is dialyzed for 5 days and freeze-dried to obtain an oxidized alginic acid powder. 5 parts by mass of the oxidized alginic acid powder are dissolved in 210 parts by mass of deionized water, and stirring is performed until the solution is clear. Then, 5 parts by mass of lysine are added, and the pH is adjusted to 5. Pre-reaction is performed at room temperature for 1 h. Then, 1 part by mass of NaCNBH3 is added, and stirring is performed at room temperature for 24 h under dark conditions. After the reaction is completed, ethanol is added to a final concentration of 75%. The precipitate is collected by centrifugation, dialyzed for 5 days to remove unreacted lysine and by-products, and freeze-dried to obtain an oxidized alginic acid-lysine complex.

[0030] S2: Preparation of a methyl thiophanate sodium salt derivative Methyldithiine is dissolved in an ethanol-water mixed solvent at a mass ratio of 1:5, stirred until completely dispersed, a 15wt% NaOH solution is added, the temperature is controlled at 50°C, the pH is adjusted to 10, stirring is continued for 4h, ethanol is removed by distillation under reduced pressure, and a solid is precipitated after cooling, which is filtered and washed with cold water to obtain a crude carboxylate sodium derivative, which is dissolved in hot water at 60°C, recrystallized after cooling, and dried to obtain a methyldithiine sodium salt derivative; In the ethanol-water mixed solvent, the mass ratio of ethanol to water is 1:5.

[0031] S3: Preparation of silver ion alkaloid complex Deionized water is added to the reaction kettle, followed by hydrogen peroxide and electrolytic silver ion solution. The electrolytic silver ion solution is prepared by using the redox reaction in the electrolysis process to make silver atoms lose electrons to form Ag⁺, which is then dispersed in water to form a uniform ionic solution. The volume ratio of deionized water, hydrogen peroxide and electrolytic silver ion solution is 5:2:1, the temperature is controlled at 25°C, the stirring speed is 800r / min, and the stirring time is 30min. A cationic surfactant, cetyltrimethylammonium bromide, is added at a content of 5% of the mass of the reaction kettle contents, and stirring is continued for 30min. Berberine is then added at a content of 35% of the mass of the reaction kettle contents, the temperature is controlled at 27°C, and stirring is continued for 40min. The mixture is allowed to stand for 20min, and then filtered through a 0.22μm microporous filter to obtain a silver ion alkaloid complex.

[0032] S4: Preparation of plant nutrient solution for bonsai flowers A plant nutrient solution for bonsai flowers is prepared by mixing 35% of an oxidized alginic acid-lysine complex, 0.1% of a methyldithiine sodium salt derivative, 0.2% of a silver ion alkaloid complex, 5% of potassium dihydrogen phosphate, 2% of a metal ion trace element, 0.3% of Tween 80 and deionized water in mass percentage, wherein the metal ion trace element is a combination of iron, zinc, manganese and molybdenum.

[0033] Comparative Example 1 Comparative Example 1 differs from Example 1 in that humic acid is used instead of alginic acid in step S1, and the remaining steps are unchanged, which is denoted as Comparative Example 1.

[0034] Comparative Example 2 Comparative Example 2 differs from Example 1 in that lysine is not added in step S1, and the remaining steps are unchanged, which is denoted as Comparative Example 2.

[0035] Comparative Example 3 Compared with Example 1, the difference of Comparative Example 3 is that methylthiophanate is not added in step S2, but is replaced by carbendazim, both of which are benzimidazole fungicides, and the remaining steps are unchanged, denoted as Comparative Example 3.

[0036] Comparative Example 4: Compared with Example 1, the difference of Comparative Example 4 is that NaOH is not added in step S2, and the remaining steps are unchanged, denoted as Comparative Example 4.

[0037] Comparative Example 5: Compared with Example 1, the difference of Comparative Example 5 is that hydrogen peroxide is not added in step S3, and the remaining steps are unchanged, denoted as Comparative Example 5.

[0038] Comparative Example 6: Compared with Example 1, the difference of Comparative Example 6 is that isoquinoline alkaloids are not added in step S3, and the remaining steps are unchanged, denoted as Comparative Example 6.

[0039] Rosa chinensis transplanted in pots after cutting treatment were selected as experimental objects, and the potted Rosa chinensis with basically consistent growth vigor were divided into 9 groups, 10 plants in each group, which were Example 1-3, Comparative Example 1-4 groups, blank group and commercial group. The plant nutrient solution of Example 1-3 and Comparative Example 1-4 was sprayed, the blank group was not sprayed with plant nutrient solution but with water, and the commercial group was sprayed with commercial flower nutrient solution; water was poured in the morning and evening every day, and plant nutrient solution was sprayed every 3 days, and the survival rate was observed after 30 days of culture, as shown in Table 1. Rosa chinensis transplanted in pots after cutting treatment were selected as experimental objects, and the potted Rosa chinensis with basically consistent growth vigor were divided into 7 groups, 10 plants in each group, which were Example 1-3, Comparative Example 1-2 groups, blank group and commercial group. The plant nutrient solution of Example 1-3 and Comparative Example 1-2 was sprayed, the blank group was not sprayed with plant nutrient solution but with water, and the average height, root depth and main branch diameter of the surviving Rosa chinensis plants were measured, as shown in Table 2.

[0040] Podosphaera pannosa spore suspension was selected as pathogenic bacteria, and the concentration was 1×10 5Spores / mL, select the growth of the same pot roses 9 groups, each group of 10 plants, respectively, examples 1-3, comparative examples 3-6 group, blank group and the commercial group, examples 1-3 group and comparative examples 3-6 group using the prepared plant nutrient solution is sprayed, every day morning and evening watering, every 3 days spray plant nutrient solution, blank group is not sprayed nutrient solution but is sprayed with water, commercial group sprayed commercial disease prevention nutrient solution, spray frequency and watering frequency and example is consistent, rose pot placed in the greenhouse, temperature 25±2℃, humidity 60%, light 12h / d, after 7 days of culture select the 5th mature rose leaves, with sterile cotton swab dipped in powdery mildew spore suspension, evenly spread on the back of the leaf, bagged and humidified for 24 hours, promote spore germination, and continue to every 3 days spray plant nutrient solution, every day morning and evening watering frequency after 24 days of culture, observation and calculation of rose powdery mildew incidence and incidence of plant leaf surface lesion area ratio of total leaf area, wherein, leaf lesion area less than 5% is not recorded as not ill, not into the leaf surface lesion area, the results are shown in table 3.

[0041] Table 1 survival rate of rose plants

[0042] Table 2 related parameters of rose plants

[0043] Table 3 rose plant lesion area

[0044] From table 1, it can be seen that examples 1-3 all contain oxidized alginic acid-lysine, the survival rate is 60%-70%, comparative example 1 replaces alginic acid with humic acid, comparative example 2 deletes lysine, the survival rate drops to 40% and 30% respectively, which shows that the combination of "alginic acid + lysine" plays a key role in promoting rose rooting and survival, and both are indispensable, after comparative example 3 and comparative example 4 lack the combination of methylthiophanate and sodium hydroxide, the survival rate also decreases, combined with table 3, it can be seen that the incidence rate increases, which shows that the increase of the incidence rate affects the survival rate of cut rose, the survival rate of the commercial group is not as good as the example, which shows that the plant nutrient solution of the application has better effect on promoting the survival and growth of cut rose.

[0045] As can be seen from Table 2, the plant height, root depth and stem diameter of Examples 1-3 are obviously superior to the blank group and the commercial group, which indicates that the formula is indeed effective in promoting the activation, growth and strengthening of the Rosa chinensis cutting seedlings, and the survival rate of the comparative example 1 lacking alginic acid or the comparative example 2 lacking lysine drops to 30%-40%, and the growth of the plant height, root depth and stem diameter is also reduced, which indicates that the two are the key organic nutrients for promoting root growth and survival; and although alginic acid and humic acid both belong to organic matter, their functions are not interchangeable; and the comparison with the commercial group can show that the plant nutrient solution of the present application has a better growth promoting effect.

[0046] As can be seen from Table 3, after the same type of carbendazim is used to replace thiophanate-methyl in the comparative example 3, the incidence rate increases from 20%-30% to 60%, and the lesion area increases from about 25% to 68%, and the comparative example 4 removes NaOH, which is equivalent to only the original thiophanate-methyl, and the disease prevention effect is significantly reduced, which shows that the preparation of the sodium salt derivative of thiophanate-methyl is a necessary step to improve the solubility and internal absorbability; And the incidence rate of the comparative example 5 lacking hydrogen peroxide and the comparative example 6 lacking isoquinoline alkaloids both increases to 70%, and the lesion area is about 72%, which shows that the hydrogen peroxide and the alkaloids jointly regulate the slow release and surface activity of silver ions, and the absence of the two will reduce the antibacterial activity of the compound, and the comprehensive effect of the present application is better than that of the commercial product.

[0047] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plant nutrient solution for bonsai flowers, characterized in that, By mass percentage, the following raw materials are included: 30-35% of oxidized alginate-lysine complex, 0.05-0.1% of methylthiophanate sodium salt derivative, 0.1-0.2% of silver ion alkaloid complex, 3-5% of potassium dihydrogen phosphate, 1-2% of metal ion trace elements, 0.1-0.3% of Tween 80, and deionized water to make up the balance.

2. The process for preparing a plant nutrient solution for potted plants according to claim 1, wherein the plant nutrient solution is prepared by adding the plant nutrient solution to the water in the water tank. The preparation of the oxidized alginate-lysine complex includes the following steps: 5-8 parts by mass of alginate is dissolved in 200-210 parts by mass of deionized water, 50-55 parts by mass of ethanol is added, mixed and stirred until completely dissolved, 2-3 parts by mass of NaIO4 is added, stirred and dissolved, the reaction system is protected by nitrogen, stirred at room temperature for 24-25 hours under light-proof conditions, after the reaction is completed, 10-15 parts by mass of ethylene glycol is added, stirred for 30-35 minutes to completely consume the remaining NaIO4, NaCl is added to the reaction solution until saturation, slowly poured into 3 times the volume of ethanol, the precipitate is collected by centrifugation, the precipitation is repeated for 3 times, dialyzed for 5 days, and freeze-dried to obtain oxidized alginate powder; 3-5 parts by mass of oxidized alginate powder is dissolved in 200-210 parts by mass of deionized water, stirred until clear, 2-5 parts by mass of lysine is added, the pH is adjusted to 5-6, pre-reacted at room temperature for 1-1.5 hours, then 0.5-1 parts by mass of NaCNBH3 is added, stirred at room temperature for 24-25 hours under light-proof conditions, after the reaction is completed, ethanol is added to a final concentration of 70-75%, the precipitate is collected by centrifugation, dialyzed for 5 days to remove unreacted lysine and by-products, and freeze-dried to obtain the oxidized alginate-lysine complex.

3. The process for preparing a plant nutrient solution for potted plants according to claim 2, wherein The preparation of the methylthiophanate sodium salt derivative includes the following steps: Methylthiophanate is dissolved in an ethanol-water mixed solvent at a mass ratio of 1:4-5, stirred until completely dispersed, NaOH solution is added, the temperature is controlled at 50-60°C, the pH is adjusted to 10-11, and the stirring is continued for 4-6 hours, then ethanol is removed by distillation under reduced pressure, the solid is precipitated after cooling, filtered, and washed with cold water to obtain a crude sodium carboxylate derivative, the crude sodium carboxylate derivative is dissolved by heating with hot water at 60-65°C, recrystallized after cooling, and dried to obtain the methylthiophanate sodium salt derivative.

4. The process for preparing a plant nutrient solution for potted plants according to claim 2, wherein The preparation of the silver ion alkaloid complex includes the following steps: Deionized water is added to the reaction kettle, and hydrogen peroxide and electrolytic silver ion solution are added in turn. The electrolytic silver ion solution is formed by the oxidation-reduction reaction in the electrolysis process, so that silver atoms lose electrons to form Ag + , which is further dispersed in water to form a uniform ionic solution. The temperature is controlled at 25-30℃, the stirring speed is 800-1000r / min, and the stirring time is 30-35min. Then, 2-5% of the cationic surfactant by mass of the content of the reaction kettle is added, and the stirring is maintained for 30-35min. Then, 30-35% of the isoquinoline alkaloid by mass of the content of the reaction kettle is added, the temperature is controlled at 27-33℃, the stirring time is 40-45min, and the standing time is 20-35min. After filtration through a microporous filter membrane, the silver ion-alkaloid complex is obtained.

5. The process for preparing a plant nutrient solution for potted plants according to claim 3, wherein The mass ratio of ethanol to water in the ethanol-water mixed solvent is 1:4-5.

6. The process for preparing a plant nutrient solution for potted plants according to claim 3, wherein The concentration of the NaOH solution is 10-15 wt%.

7. The process for preparing a plant nutrient solution for potted plants according to claim 4, wherein The volume ratio of deionized water, hydrogen peroxide, and electrolytic silver ion solution is 5:2:0.5-1.

8. The process for preparing a plant nutrient solution for potted plants according to claim 4, wherein The cationic surfactant is cetyltrimethylammonium bromide.

9. The process for preparing a plant nutrient solution for potted plants according to claim 4, wherein The isoquinoline alkaloid is one of berberine, strychnine, and jatrorrhizine, and the pore size of the microporous filter membrane is 0.22 μm.

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