Plant growth regulator containing chlorhematin as well as preparation method and application of plant growth regulator

Abstract

The invention provides a chlorhematin-containing plant growth regulator as well as a preparation method and application thereof, and relates to the technical field of plant growth regulators. The plant growth regulator containing chlorhematin is prepared from the following raw materials in percentage by mass: 0.2 to 0.5 percent of microencapsulated chlorhematin, 3 to 6 percent of triterpenoid saponin, 1 to 2 percent of oleanolic acid-beta-cyclodextrin inclusion compound, 3 to 6 percent of tea saponin, 2 to 4 percent of sodium lignin sulfonate, 0.2 to 0.5 percent of polyether modified organic silicon defoaming agent, 1 to 3 percent of sodium polyacrylate dispersing agent, 0.5 to 1.5 percent of polyvinyl alcohol and the balance of water. 0.5-1.5% of sodium carboxymethyl cellulose and the balance of pre-gelatinized starch; the microencapsulated hemin wall material consists of sodium alginate, chitosan and gelatin in a mass ratio of 3: (2-3): 1; the triterpenoid saponin is gynostemma pentaphyllum saponin and / or ginsenoside.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plant growth regulators, in particular to a plant growth regulator containing hematin chloride and a preparation method and application thereof. BACKGROUND

[0002] Plant growth regulators are a class of pesticides used to regulate plant growth and development, and play an important role in modern agricultural production. With the rapid development of unmanned aerial vehicle (UAV) spraying technology, higher requirements are put forward for the dosage form of plant growth regulators.

[0003] However, there are still many problems in the plant growth regulator products on the market, which seriously restrict their application in the field of UAV spraying. First of all, poor defoaming performance is the most prominent problem. Traditional formulations produce a large amount of foam during high-speed stirring and spraying, which seriously affects the efficiency of UAV spraying. The effect of single defoamer is very limited, which cannot meet the actual needs of rapid dispensing in UAV spraying, resulting in prolonged dispensing time and low operation efficiency.

[0004] Secondly, poor dissolution performance is also a common problem. The wetting time of existing products is long, the dispensing efficiency is low, and it is easy to produce sediment and block the nozzle. Especially in low temperature environment, the dissolution performance is further deteriorated, which brings greater difficulty to the actual application.

[0005] Thirdly, the short duration limits the economy of the product. The active ingredients in traditional products show instantaneous release characteristics, which need to be applied multiple times during the whole growth period, not only increasing the cost and labor intensity, but also the active ingredients are easily affected by environmental factors and quickly degraded, which cannot achieve long-acting controlled release.

[0006] Finally, low bioavailability also restricts the full play of product efficacy. Hydrophobic active ingredients (such as triterpenoids) have poor dispersibility in water, resulting in low leaf absorption efficiency and insufficient drug efficacy. In order to achieve the expected effect, it is often necessary to increase the dosage, which not only increases the use cost, but also aggravates the environmental burden, forming a vicious cycle.

[0007] Therefore, it is of great significance to develop a new type of plant growth regulator with excellent defoaming performance, rapid dissolution, long-acting, environmental friendliness and high bioavailability for promoting the development of UAV spraying technology and green agriculture construction. SUMMARY

[0008] Therefore, the present application provides a plant growth regulator containing hematin chloride and a preparation method and application thereof. The present application improves the foaming and dissolution properties of plant growth regulators, which is used in UAV spraying operation, can improve the efficiency of UAV spraying operation, reduce the nozzle blockage rate, and has good application and promotion prospects.

[0009] The first aspect of this invention is to provide a plant growth regulator containing heme chloride, comprising the following raw materials in weight percentages: Microencapsulated heme chloride 0.2-0.5%, triterpenoid saponins 3-6%, oleanolic acid-β-cyclodextrin inclusion complex 1-2%, tea saponin 3-6%, sodium lignosulfonate 2-4%, polyether modified silicone defoamer 0.2-0.5%, sodium polyacrylate dispersant 1-3%, polyvinyl alcohol 0.5-1.5%, sodium carboxymethyl cellulose 0.5-1.5%, and the balance is pregelatinized starch (α-starch).

[0010] Preferably, the plant growth regulator containing heme chloride comprises the following raw materials in weight percentages: Microencapsulated heme chloride 0.3%, triterpenoid saponins 4.5%, oleanolic acid-β-cyclodextrin inclusion complex 1.5%, tea saponin 4%, sodium lignosulfonate 3%, polyether modified organosilicon defoamer 0.3%, sodium polyacrylate dispersant 2%, polyvinyl alcohol 1%, sodium carboxymethyl cellulose 1%, and the balance is pregelatinized starch (α-starch).

[0011] Preferably, the microencapsulated heme chloride wall material is composed of sodium alginate, chitosan, and gelatin in a mass ratio of 3:(2-3):1, and the microcapsule particle size is 5-15 μm, more preferably 8-12 μm.

[0012] Preferably, the triterpenoid saponin is gypenosides and / or ginsenosides. More preferably, the triterpenoid saponin is gypenosides.

[0013] Preferably, the oleanolic acid content in the oleanolic acid-β-cyclodextrin inclusion complex is 0.3-0.7%, more preferably 0.5%, and the inclusion ratio (oleanolic acid:β-cyclodextrin) is 1:(2-5), more preferably 1:3.

[0014] Preferably, the particle size of the triterpenoid saponins is 100-300 nm, more preferably 150-200 nm.

[0015] Preferably, the saponin content of the tea saponin is ≥60%.

[0016] The microcapsule wall material of this invention adopts a natural polymer ternary composite system, through Ca 2+ Cross-linking, electrostatic attraction, and hydrogen bonding form a quaternary cross-linking network. The functional triterpenoid compound achieves dual functions of growth regulation and defoaming. Tea saponin, as the main natural surfactant, forms a triple defoaming system with oleanolic acid and organosilicon defoamer. Each component produces a synergistic effect of "1+1>2".

[0017] The preparation method of the microencapsulated heme chloride described in this invention is as follows: S2-1. Weigh the raw materials according to the proportions; S2-2. Dissolve sodium alginate and gelatin in deionized water to prepare a wall material solution and stir to dissolve. Add heme chloride to the wall material solution and stir to mix thoroughly to obtain a uniform core material-wall material mixture. Emulsify to obtain an emulsion with a droplet size of 20-50 μm. S2-3. Mix calcium chloride solution and chitosan solution and adjust pH with acetic acid to obtain crosslinking solution; add the emulsion from step S2-2 dropwise into crosslinking solution, let stand, and then pass through Ca... 2+ Ionic crosslinking with sodium alginate and electrostatic attraction between chitosan and sodium alginate form a preliminary microcapsule structure. S2-4. Remove the microcapsules that have been preliminarily cured in step S2-3 from the crosslinking solution, rinse them with deionized water, and then transfer them to a chitosan solution. Stir slowly at room temperature. Through electrostatic attraction and hydrogen bonding, chitosan forms a coating layer on the surface of the microcapsules with a thickness of 0.5-2 μm, forming sodium alginate-Ca. 2+ -Chitosan-gelatin quaternary cross-linked network; S2-5. Wash with deionized water 3-5 times to remove residual crosslinking agent and unreacted chitosan, then spray dry or freeze dry to obtain microencapsulated heme chloride.

[0018] Preferably, in step S2-2, the solid content of the wall material solution is 3-5%, more preferably 4%; the stirring and dissolving temperature is 40-50℃, and the stirring time is 60-90 min, more preferably 45℃ for 60 min; the emulsification speed is 6000-10000 rpm, more preferably 8000 rpm, the emulsification time is 10-20 min, more preferably 15 min, and the emulsification temperature is 20-30℃; in step S2-3, the concentration of the calcium chloride solution is 2%-4%, more preferably 3%; the concentration of the chitosan solution is 0.5-1.5%, more preferably 1%; the pH of the crosslinking solution is 5.0-5.5, more preferably 5.2; the emulsion dropping rate is 20-40 drops / min, more preferably 30 drops / min; and the standing time is 20-40 min, more preferably 30 min. min; in steps S2-4, the concentration of the chitosan solution is 1%-2%, more preferably 1.5%; the stirring temperature is room temperature, the stirring speed is 100-200 rpm, and the stirring time is 10-20 min, more preferably 15 min.

[0019] Preferably, the microencapsulated heme chloride has a water content of ≤5%, a particle size of 5-15 μm, and an encapsulation rate of ≥90%.

[0020] The preparation method of the oleanolic acid-β-cyclodextrin inclusion complex of the present invention is as follows: S3-1. Weigh the raw materials according to the proportions; S3-2. Dissolve β-cyclodextrin in deionized water, add oleanolic acid and ethanol under heating conditions, stir, cool, let stand overnight, centrifuge, and freeze dry to obtain oleanolic acid-β-cyclodextrin inclusion complex.

[0021] Preferably, in step S3-2, the heating temperature is 50℃-70℃, more preferably 60℃; the amount of ethanol used is 30%-50% of the amount of water; the stirring temperature is 60℃, and the stirring time is 2-4 h, more preferably 3 h.

[0022] Preferably, the inclusion rate of the oleanolic acid-β-cyclodextrin inclusion complex is ≥90%.

[0023] A second aspect of the present invention is to provide a method for preparing the plant growth regulator containing heme chloride, comprising the following steps: S1-1. Weigh the raw materials according to the proportions; S1-2, Encapsulated heme chloride, triterpenoid saponins, oleanolic acid-β-cyclodextrin inclusion complex, tea saponin, sodium lignosulfonate, sodium polycarboxylate dispersant, polyvinyl alcohol, and sodium carboxymethyl cellulose are added to a high-speed mixer and mixed to obtain a premixed material; S1-3. The premixed material from step S1-2 is fed into an air jet mill for pulverization and passed through a 100-mesh sieve. The air jet milling further breaks up the agglomerates and improves the uniformity. S1-4. Add pregelatinized starch (α-starch), mix, spray with polyether-modified silicone defoamer solution, mix lightly to make the defoamer evenly distributed on the particle surface to form a microfilm layer, cool, and obtain a plant growth regulator containing heme chloride.

[0024] Preferably, in step S1-2, the mixing rate is 200-400 rpm, more preferably 300 rpm, and the mixing time is 5-15 min, more preferably 10 min; in step S1-3, the airflow pressure is 0.6-0.8 MPa; in step S1-4, the solid content of the sprayed polyether-modified silicone defoamer solution is 10-30%, and the solvent is ethanol or water; the spraying atomization pressure is 0.2-0.4 MPa, the inlet air temperature is 40℃-60℃, the bed temperature is 30℃-40℃, and the light mixing time is 5-10 min.

[0025] A third aspect of the present invention is to provide the application of the plant growth regulator containing heme chloride in aerial spraying operations.

[0026] This invention utilizes a natural polymer composite wall material that forms a three-dimensional cross-linked network through four forces, constructing a unique microcapsule structure. The first layer of the network is formed through Ca... 2+ Ionic cross-linking is formed. The carboxyl groups (-COO) on the sodium alginate molecular chain... - ) and Ca2+ This forms a characteristic "eggbox" structure, particularly in the G region (guluronic acid) segment, via Ca... 2+ The bridging effect forms a robust three-dimensional network. This ionic cross-linking not only provides the basic framework of the microcapsules, but the cross-linking density can also be adjusted by regulating the Ca2+ cross-linking density. 2+ Precise concentration control lays the foundation for the mechanical strength of the microcapsules. The second-layer network is constructed based on electrostatic attraction. The amino groups (-NH3) on the chitosan molecular chain... + In an acidic environment, it protonates and becomes positively charged, reacting with the carboxyl group (-COO) of sodium alginate. - A strong electrostatic attraction is generated between negative charges. This interaction of positive and negative charges forms a polyelectrolyte complex (PEC), which not only significantly enhances the mechanical strength of the microcapsules but also greatly improves their chemical stability. This electrostatic crosslinking with Ca... 2+ The complementary ionic cross-linking of the microcapsule layers makes the microcapsule structure more stable and reliable. The third network layer is formed through hydrogen bonding. As a natural protein, gelatin's molecular chain contains abundant amino, carboxyl, and hydroxyl functional groups, which can form a broad hydrogen bond network with sodium alginate and chitosan. Gelatin's unique triple helix structure undergoes physical gelation during cooling, further enhancing the overall structure of the microcapsule. This hydrogen bond network provides the microcapsule with good elasticity and toughness, making it less prone to breakage under mechanical stress. The fourth protective layer is achieved through chitosan coating. After the initial microcapsule formation, a secondary coating process is performed in a chitosan solution to form a dense coating layer with a thickness of 0.5-2 μm on the microcapsule surface. This outer protective film not only has excellent film-forming properties but also possesses antibacterial and antioxidant functions, effectively protecting the internal active ingredients from external environmental influences. The coating layer significantly improves the microcapsule's abrasion resistance and storage stability, extending the product's shelf life. The synergistic effect of these four forces produces unexpectedly superior performance. Through multiple cross-linking processes including ionic bonds, electrostatic interactions, hydrogen bonds, and physical coating, a high-strength and high-stability composite wall material system is formed.

[0027] Oleanolic acid plays a unique dual role in the formulation. As a deglycosylated triterpenoid, oleanolic acid is strongly hydrophobic, enabling it to quickly adsorb onto the surface of the foam film and disrupt its stable structure, thus achieving a physical defoaming effect. Simultaneously, oleanolic acid itself is also an important bioactive substance with multiple effects, including promoting cell regeneration, enhancing plant immunity, and antioxidation. When oleanolic acid is used in combination with triterpenoid saponins, a significant synergistic effect is produced, resulting in a significant increase in crop yield. Additionally, ginsenosides can also play a good role in this invention, but considering cost factors, they are not considered as a preferred option. Other common triterpenoid saponins fail to achieve the expected technical effects, possibly due to differences in their aglycone skeleton types.

[0028] The introduction of β-cyclodextrin inclusion complex technology has solved the application challenges of oleanolic acid. Due to its strong hydrophobicity, oleanolic acid is almost insoluble in water, making direct application difficult to achieve its intended effect. By forming an inclusion complex with β-cyclodextrin, oleanolic acid is encapsulated within the hydrophobic cavities of the cyclodextrin, thus improving its water solubility and dispersibility. Cyclodextrin inclusion complex not only enhances the bioavailability of oleanolic acid but also effectively protects it from oxidative degradation. Furthermore, the slow dissociation of the inclusion complex controls the release rate of oleanolic acid, ensuring its sustained efficacy.

[0029] The combination of the two triterpenoid components produced a significant synergistic effect. From a bioactivity perspective, the plant growth-regulating effects of triterpenoid saponins and oleanolic acid are superimposed, resulting in a synergistic effect of "1+1>2". From a functional perspective, the defoaming function of oleanolic acid perfectly complements the foam-generating deficiency of triterpenoid saponins as surfactants, achieving a dual optimization of performance and economy.

[0030] This invention creatively constructs a triple defoaming system composed of tea saponin, oleanolic acid, and a polyether-modified organosilicon defoamer, which perfectly complement each other in terms of defoaming mechanism and action time. Tea saponin, as a natural triterpenoid saponin surfactant, has a typical amphiphilic molecular structure, enabling it to rapidly insert into the foam film. Its asymmetric distribution of hydrophobic and hydrophilic ends rapidly reduces the surface tension and elastic modulus of the foam film, causing it to lose stability and rupture. The defoaming action of tea saponin is extremely fast, almost instantaneous, but its duration is relatively short. Oleanolic acid, as a desaccharified triterpenoid, has extremely strong hydrophobicity and plays a physical defoaming role in the defoaming system. When oleanolic acid molecules come into contact with the foam film surface, their hydrophobic groups are strongly adsorbed onto the foam film, disrupting its stability by altering the local surface tension gradient. While oleanolic acid and tea saponin have different defoaming mechanisms, they synergistically accelerate the foam rupture rate. More importantly, oleanolic acid can, to some extent, compensate for the insufficient persistence of tea saponins, making the defoaming effect more lasting. Polyether-modified silicone defoamer has extremely low surface tension and a very high spreading coefficient, enabling it to rapidly spread and form a monolayer on the liquid surface. This ultra-thin silicone film not only quickly destroys existing foam but, more importantly, inhibits the formation of new foam for a long time. The introduction of the polyether segment improves the dispersion stability of silicone in the aqueous phase, allowing it to continuously exert its antifoaming effect and compensating for the short action time of the first two defoamers. The combination of these three achieves a perfect combination of "rapid defoaming + long-lasting antifoaming," not only solving the thorny foam problem in aerial spraying operations but also significantly improving the product's solubility.

[0031] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention utilizes a triple defoaming system constructed from tea saponin, oleanolic acid, and polyether-modified organosilicon to improve the foaming properties of plant growth regulators containing heme chloride, shorten preparation time, increase the efficiency of aerial spraying operations, and reduce nozzle clogging rate.

[0032] The plant growth regulator containing heme chloride of this invention has significantly improved solubility and can dissolve rapidly even at a low temperature of 4°C.

[0033] This invention is based on the quaternary cross-linking network of natural polymer composite wall material and the dual pH / humidity response mechanism, which prolongs the field residual effect of plant growth regulators containing heme chloride, reduces the number of applications, and significantly reduces labor intensity and cost.

[0034] The present invention utilizes the synergistic effect of triterpenoid saponins and oleanolic acid to increase crop yield, reduce pesticide usage, and achieve a high proportion of natural components. It uses 100% natural polymer wall materials and natural surfactant tea saponin to replace most synthetic surfactants. The degradation products are non-toxic and harmless substances such as alginic acid, glucosamine, and amino acids, which meet the development needs of green pesticides. Attached Figure Description

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] Figure 1 This is a flowchart illustrating the preparation process of the plant growth regulator containing heme chloride according to the present invention. Detailed Implementation

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] Unless otherwise specified, all experiments were repeated three times, and the results are expressed as averages.

[0039] Example 1 A plant growth regulator containing heme chloride, with the following composition: Microencapsulated heme chloride 0.3%, Gynostemma pentaphyllum saponins 4.5% (particle size 180 nm), oleanolic acid-β-cyclodextrin inclusion complex 1.5% (oleanolic acid content 0.5%), tea saponin 4.0%, sodium lignosulfonate 3.0%, polyether modified silicone defoamer 0.3%, sodium polycarboxylate dispersant 2.0%, polyvinyl alcohol 1.0%, sodium carboxymethyl cellulose 1.0%, and the balance being pregelatinized starch (α-starch).

[0040] The preparation method of the microencapsulated heme chloride is as follows: Weigh 6 g of sodium alginate and 2 g of gelatin, add deionized water to 200 g, stir at 45℃ for 60 min until completely dissolved, add 3 g of heme chloride, mix thoroughly, and emulsify at 8000 rpm for 15 min; the crosslinking solution is 3% CaCl2 + 1% chitosan, pH 5.2, drop the solution through a 0.8 mm needle at a rate of 30 drops / min, then let it stand for 30 min, transfer it to a 1.5% chitosan solution (pH 5.8, chitosan amount is 4 g), stir slowly for 15 min to form a coating, filter, wash 3 times, freeze dry to obtain microencapsulated heme chloride with a particle size of 8-12 μm.

[0041] The preparation method of the oleanolic acid-β-cyclodextrin inclusion complex is as follows: 5g of oleanolic acid and 15g of β-cyclodextrin are dissolved in 50 mL of ethanol-water (1:1), stirred at 60℃ for 3 h, and freeze-dried to obtain the oleanolic acid-β-cyclodextrin inclusion complex.

[0042] The preparation method of the plant growth regulator containing heme chloride is as follows: Weigh the raw materials according to the proportions, mix microencapsulated heme chloride, gypenosides, tea saponins, lignin sulfonic acid, sodium polycarboxylate dispersant, polyvinyl alcohol, and sodium carboxymethyl cellulose at 300 rpm for 10 min, pulverize through a 100-mesh sieve at 0.7 MPa, add pregelatinized starch (α-starch), mix for 30 min, spray with an organosilicon defoamer solution (solid content of 20%, solvent of water) at 0.3 MPa, with an inlet air temperature of 40℃, and perform light mixing in a fluidized bed for 5 min at a bed temperature of 35℃.

[0043] The technical solutions for Examples 2-5 are as follows:

[0044] Note: The remaining steps are the same as in Example 1.

[0045] The performance test results of products in Examples 1-5 are as follows:

[0046] The technical solutions for comparative examples 1-4 are as follows:

[0047] Note: The remaining raw materials and preparation process are the same as in Example 1.

[0048] The performance test results of Comparative Examples 1-4 are as follows:

[0049] Comparative Example 1 lacks the electrostatic adsorption and hydrogen bonding of chitosan and gelatin, resulting in a loose microcapsule structure, low encapsulation efficiency, decreased thermal storage stability, shortened field duration of effectiveness, and reduced yield increase. Comparative Example 2 lacks the hydrogen bonding network and physical gelation effect of gelatin, resulting in insufficient microcapsule toughness, low encapsulation efficiency, low thermal storage stability, and short duration of effectiveness. Comparative Example 3 has an imbalanced ratio of the three components, with insufficient sodium alginate content leading to insufficient Ca... 2+ The cross-linked network was not dense enough, resulting in low encapsulation efficiency, low retention of active ingredients, and short duration of effect. Comparative Example 4 lacked the electrostatic adsorption of chitosan and the protection of the outer coating, leading to poor microcapsule stability, low encapsulation efficiency, decreased thermal storage stability, and short field duration of effect. Therefore, the synergistic effect of sodium alginate, chitosan, and gelatin achieved optimal encapsulation, thermal storage stability, and field duration of effect, fully demonstrating the crucial role of the composition and ratio of the wall material.

[0050] The technical solutions for comparative examples 5-9 are as follows:

[0051] Note: If tea saponin is lacking, sodium lignin sulfonate can be used to supplement it to maintain the total surfactant content. The remaining components and steps are the same as in Example 1.

[0052] The defoaming performance test results of Comparative Examples 5-9 are as follows:

[0053] This invention utilizes tea saponin (rapid defoaming), oleanolic acid (physical defoaming + bioactivity), and organosilicon (long-lasting foam suppression) to achieve a perfect complementarity in defoaming mechanism and action time, thus realizing the best defoaming effect.

[0054] Comparative Example 5 lacks rapid insertion and defoaming action, resulting in prolonged initial defoaming speed and increased preparation time. Although it contains organosilicon and oleanolic acid, its instantaneous defoaming ability is severely insufficient. Comparative Example 6 lacks physical adsorption defoaming and synergistic bioactivity, leading to prolonged defoaming speed. The rapid action of tea saponin is not enhanced by oleanolic acid, resulting in a significant decrease in persistence. Comparative Example 7 lacks a spreading and film-forming foam-suppressing mechanism, exhibiting high persistent foaming properties. Although it has instantaneous defoaming, it cannot continuously suppress the generation of new foam, resulting in long preparation time and high clogging rate during aerial spraying. Comparative Example 8, with its single defoaming system, performs the worst and cannot meet the requirements of aerial spraying at all. Comparative Example 9, although possessing dual defoaming, lacks the rapid defoaming action of the natural surfactant tea saponin, resulting in long wetting time and decreased overall dispersion performance.

[0055] The technical solutions for comparative examples 10-12 are as follows:

[0056] Note: If the active ingredient is lacking, pregelatinized starch is used to make up the difference. The remaining components and steps are the same as in Example 1.

[0057] The performance test results (wheat) for Comparative Example 10-12 are as follows:

[0058] The synergistic bioactivity system of gypenosides and oleanolic acid-β-cyclodextrin inclusion complex of the present invention achieves a significant synergistic effect, with both components producing significant synergistic effects in promoting plant growth, enhancing stress resistance, and prolonging the duration of efficacy. Furthermore, the antioxidant effect of oleanolic acid protects gypenosides from rapid degradation, and the microencapsulated slow release synergistically with the bioactivity extends the duration of efficacy in the field.

[0059] Comparative Example 13 The difference from Example 1 is that 0.5% oleanolic acid was used instead of the oleanolic acid-β-cyclodextrin inclusion complex, and the missing 1.0% was made up with pregelatinized starch (α-starch). The product performance test results are as follows:

[0060] Comparative Example 13 used unencapsulated oleanolic acid, which, due to its strong hydrophobicity, is almost insoluble in water, resulting in a significantly prolonged wetting time and severely affecting the product's dispersibility and solubility. Poor dispersion leads to a substantial increase in persistent foaming, prolonging preparation time and hindering aerial spraying operations. Unencapsulated oleanolic acid lacks the protection of the β-cyclodextrin cavity, making it susceptible to oxidative degradation during storage and use, resulting in decreased thermal stability and a shortened field retention period.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A plant growth regulator comprising chlorinated hematin, characterized in that, The raw materials include the following mass percentages: Microencapsulated hematin chloride 0.2-0.5%, triterpene saponin 3-6%, oleanolic acid-β-cyclodextrin inclusion compound 1-2%, tea saponin 3-6%, lignin sulfonate sodium 2-4%, polyether modified silicone defoamer 0.2-0.5%, polyacrylic acid sodium dispersant 1-3%, polyvinyl alcohol 0.5-1.5%, sodium carboxymethyl cellulose 0.5-1.5%, and the rest is pregelatinized starch; The wall material of the microencapsulated hematin chloride is composed of sodium alginate, chitosan, and gelatin in a mass ratio of 3:(2-3):1; The triterpene saponin is gypenoside and / or ginsenoside.

2. The heme chloride-containing plant growth regulator according to claim 1, characterized by The plant growth regulator containing hematin chloride includes the following mass percentages of raw materials: Microencapsulated hematin chloride 0.3%, triterpene saponin 4.5%, oleanolic acid-β-cyclodextrin inclusion compound 1.5%, tea saponin 4%, lignin sulfonate sodium 3%, polyether modified silicone defoamer 0.3%, polyacrylic acid sodium dispersant 2%, polyvinyl alcohol 1%, sodium carboxymethyl cellulose 1%, and the rest is pregelatinized starch.

3. The plant growth regulator containing chlorinized hematin according to claim 1 or 2, characterized in that, The particle size of the microencapsulated hematin chloride is 5-15 μm, the water content is ≤5%, and the encapsulation rate is ≥90%.

4. The plant growth regulator containing chlorinized hematin according to claim 1 or 2, characterized in that, The triterpene saponin is gypenoside.

5. The plant growth regulator containing chlorinized hematin according to claim 1 or 2, characterized in that, The oleanolic acid content in the oleanolic acid-β-cyclodextrin inclusion compound is 0.3-0.7%, and the inclusion ratio is 1:(2-5).

6. The plant growth regulator containing chlorinized hematin according to claim 1 or 2, characterized in that, The particle size of the triterpene saponin is 100-300 nm.

7. The plant growth regulator containing chlorinized hematin according to claim 1 or 2, characterized in that, The saponin content of the tea saponin is ≥60%.

8. A process for the preparation of a heme chloride-containing plant growth regulator as claimed in any one of claims 1 to 7, characterized in that, The method includes the following steps: S1-1, weighing the raw materials in proportion; S1-2, mixing the encapsulated hematin chloride, triterpene saponin, oleanolic acid-β-cyclodextrin inclusion compound, tea saponin, lignin sulfonate sodium, polyacrylic acid sodium dispersant, polyvinyl alcohol, and sodium carboxymethyl cellulose in a high-speed mixer to obtain a premix; S1-3, crushing the premix of step S1-2 in an air flow crusher, passing through a 100-mesh sieve, and further dispersing the agglomeration to improve uniformity through air flow crushing; S1-4, adding pregelatinized starch (α-starch), mixing, spraying polyether modified silicone defoamer solution, slightly mixing to make the defoamer evenly distributed on the surface of the particles to form a microfilm layer, cooling, and obtaining the plant growth regulator containing hematin chloride.

9. The production method according to claim 8, characterized by, In step S1-2, the mixing speed is 200-400 rpm, and the mixing time is 5-15 min; in step S1-3, the air flow pressure is 0.6-0.8 MPa; in step S1-4, the solid content of the sprayed polyether modified silicone defoamer solution is 10-30%, the solvent is ethanol or water, the spraying atomization pressure is 0.2-0.4 MPa, the inlet air temperature is 40-60°C, the bed temperature is 30-40°C, and the slight mixing time is 5-10 min.

10. Use of a chlorinated haem-containing plant growth regulator in aerial application, characterized in that, The plant growth regulator containing hematin chloride is the plant growth regulator containing hematin chloride according to any one of claims 1-7 or prepared by the method of claim 8 or 9.

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