High-wettability rice leaf fertilizer and preparation method thereof

Abstract

The invention belongs to the technical field of agricultural functional aids and foliar fertilizers, and particularly relates to a high-wetting rice foliar fertilizer and a preparation method thereof. The high-wettability rice leaf fertilizer comprises a basic leaf fertilizer and a surfactant, wherein the surfactant is an organosilicon polyether compound or a fluorine-containing organosilicon polyether compound. A specific surfactant is added into a conventional foliar fertilizer to form a stable solution, and the original stability of the foliar fertilizer is not influenced; meanwhile, the contact angle of the foliar fertilizer on rice leaves is greatly reduced, and even if the foliar fertilizer is diluted to 500 times, the contact angle can still be smaller than 90 degrees, so that the foliar fertilizer can be better wetted on the rice leaves and is not easy to slip off, and the absorption of the rice on the foliar fertilizer is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of agricultural functional auxiliaries and foliar fertilizers, and particularly relates to a highly wettable rice foliar fertilizer and a preparation method thereof. Background Art

[0002] The research and application of rice foliar fertilizers have a history of more than 200 years, and its development process can be divided into several stages. In the 18th century, there were examples of applying river mud manure and other raw materials to the leaves of rice. In the 1940s - 1960s of the 20th century, the application of foliar fertilizers began in large - scale agricultural production, mainly by spraying urea and leachate of plant ash on crops to promote growth and increase yield. In the early 1960s of the 20th century, various types of commercial foliar fertilizers appeared in Japan and Western Europe. Chelating agents were added to single - fertilizer formulations, the concentration of foliar fertilizers was increased, and foliar fertilizers mainly composed of chelated trace elements were developed.

[0003] Leaves are one of the important nutrient organs of plants. The form and mechanism of nutrient absorption by leaves conform to the five major mechanisms of fertilization, namely the theory of nutrient return, the law of the minimum nutrient, the law of the optimal factor, the law of diminishing returns, and the law of comprehensive factor action. The aqueous solution sprayed on the leaf surface first wets the solid surface, then diffuses into the leaf, and finally reaches the interior of the cell to play a role. Experiments have shown that the proportion of nutrient content remaining on the leaf surface to the original content has an exponential relationship with the penetration time.

[0004] There are many types of foliar fertilizers. According to their functions and components, they are usually divided into nutrient - type, regulatory - type, biological - type, fertilizer - pesticide - type, compound - type, etc. Nutrient - type foliar fertilizers mainly provide nitrogen, phosphorus, potassium, and trace elements, etc. Regulatory - type foliar fertilizers contain growth - regulating substances. Biological - type foliar fertilizers contain microorganisms and their metabolites. Fertilizer - pesticide - type foliar fertilizers combine pesticide components, and compound - type foliar fertilizers combine multiple functions.

[0005] The effects of foliar fertilizers on rice are mainly reflected in increasing yield, improving quality, and reducing heavy - metal accumulation, etc. For example, foliar fertilizers can increase the yield of rice by increasing yield - component factors such as the number of effective panicles, the number of grains per panicle, and the 1000 - grain weight. In addition, foliar fertilizers can also reduce the percentage of chalky grains and chalkiness degree of grains, increase the milled rice rate and brown rice rate, and improve the amylose and protein contents, etc., thereby improving the quality of rice. In terms of reducing heavy - metal accumulation, foliar fertilizers can significantly reduce the cadmium accumulation in the above - ground parts of rice seedlings by spraying heavy - metal chelating agents and other methods.

[0006] The problems existing in the application of foliar fertilizers mainly include time-consuming and laborious application methods, insufficient richness of varieties, uneven application effects, etc. The future development strategies and trends include mechanization of fertilization technology, diversification of fertilizers, low cost, and environmental protection of materials. With the progress of technology, the application of foliar fertilizers will be more efficient and environmentally friendly, contributing to the comprehensive goals of high yield, high quality, high efficiency, ecology, and safety of rice.

[0007] However, the existing basic foliar fertilizers generally cannot contact well with the rice leaves, thus affecting the absorption of foliar fertilizers by rice. How to make the foliar fertilizer contact and wet the rice leaves better is a technical problem that needs to be solved by those skilled in the art.

[0008] Improving the wetting and spreading of foliar fertilizers by adding surfactants is a feasible technical direction. There are tens of thousands of types of surfactants currently, and people have carried out different classifications according to their chemical structures, properties, and uses. Generally, it is based on the structure of the hydrophilic group, that is, classified according to chemical structure, into cationic, anionic, amphoteric, non-ionic surfactants, and silicone oil surfactants. How to select or prepare suitable surfactants according to the characteristics of basic foliar fertilizers to achieve better contact wetting and maintain good stability is a technical problem that needs to be further solved. Summary of the Invention

[0009] In order to improve the contact wetting of foliar fertilizers on rice leaves, the main object of the present invention is to provide a highly wettable rice foliar fertilizer and its preparation method.

[0010] The object of the present invention is achieved by the following technical solutions: A highly wettable rice foliar fertilizer, comprising a basic foliar fertilizer and a surfactant, wherein the surfactant is an organosilicon polyether compound or a fluorinated organosilicon polyether compound.

[0011] Preferably, the mass of the surfactant is 0.5 - 5% of the mass of the basic foliar fertilizer.

[0012] Preferably, the organosilicon polyether compound uses an organosilicon polyoxyethylene ether compound. It is a commonly used agricultural organosilicon synergist, having low surface tension, good spreading property, permeability, and emulsifying and dispersing property.

[0013] Preferably, the fluorinated organosilicon polyether compound uses a fluorinated organosilicon polyether compound prepared by the following method: React hydroxyfluorosilicone oil with diisocyanate to obtain an isocyanate-terminated fluorosilicone oil, and then react it with polyethylene glycol to obtain a polyether-terminated fluorinated organosilicon polyether compound.

[0014] Preferably, the hydroxyfluorosilicone oil is a raw material that can be purchased on the market, and it is an oligomer obtained by ring-opening reaction of trifluoropropylmethylcyclotrisiloxane (D3F); in this application, the viscosity of the hydroxyfluorosilicone oil is preferably 50-100 mPa·s, and the average molecular weight is 3000-8000.

[0015] Preferably, the diisocyanate is any one of hexamethylene diisocyanate, toluene diisocyanate, p-phenylene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate.

[0016] Preferably, the molar ratio of the reaction of the hydroxyfluorosilicone oil to the diisocyanate is 1:2-2.2. By using an excessive amount of diisocyanate in the reaction, the end groups of the intermediate product are isocyanate groups.

[0017] Preferably, the reaction of the hydroxyfluorosilicone oil with the diisocyanate is carried out under the condition of an organic solvent, and the organic solvent is any one of toluene, N-methylpyrrolidone, N,N-dimethylformamide. Using the above organic solvents can better promote the phase solubility and reaction of the reaction materials. The temperature of the reaction of the diisocyanate is 40-60 °C, and the reaction time is 6-20 h.

[0018] Preferably, the average molecular weight of the polyethylene glycol is 1000-2000; the molar ratio of the polyethylene glycol to the hydroxyfluorosilicone oil is 2-2.5:1. By using an excessive amount of polyethylene glycol, the final product is mainly a low-polymer structure with a fluorinated polysiloxane chain in the middle and polyether chains at both ends, which plays a key role in improving the wettability and stability of the rice foliar fertilizer. The temperature for the reaction of the polyethylene glycol is 60-100 °C, and the reaction time is 6-20 h.

[0019] Preferably, the basic foliar fertilizer uses commonly used amino acid water-soluble fertilizers, silicon-containing water-soluble fertilizers, organic water-soluble fertilizers, or trace element water-soluble fertilizers on the market. As an example, the component composition ratio of the amino acid water-soluble fertilizer is any one of the following (1) or (2): (1) Glycine 8-15%, chelated manganese 1-2%, chelated zinc 10-15%, boric acid 0.2-0.5%, sorbitol 1-3%, and the balance is water; (2) Glycine 8-15%, calcium nitrate tetrahydrate 10-20%, magnesium nitrate hexahydrate 5-10%, alkyl glycoside 0.5-2%, and the balance is water; The component composition ratio of the silicon-containing water-soluble fertilizer is: potassium silicate 60-85%, and the balance is water; The composition ratio of the organic water-soluble fertilizer is as follows: sodium molybdate 0.05 - 0.2%, potassium dihydrogen phosphate 5 - 10%, monoammonium phosphate 15 - 25%, urea 0.5 - 2%, glycolipid 10 - 20%, boric acid 0.1 - 0.5%, chelated zinc 10 - 25%, chelated manganese 0.2 - 0.5%, chelated copper 0.2 - 0.5%, citric acid 0.5 - 2%, alkyl polyglycoside 0.1 - 0.5%, and the balance is water; The composition ratio of the trace element water-soluble fertilizer is as follows: boric acid 20 - 30%, ammonium nitrogen fertilizer (such as ammonium sulfate, ammonium chloride, ammonium bicarbonate, etc.) 5 - 15%, chelated zinc 20 - 35%, chelated iron 1 - 2%, chelated copper 1 - 2%, chelated manganese 1 - 2%, sodium molybdate 0.1 - 1%, alkyl polyglycoside 0.1 - 0.2%, ethylene glycol 1 - 5%, citric acid 2 - 5%, and the balance is water.

[0020] The preparation method of the above highly wettable rice foliar fertilizer includes the following steps: Adding a surfactant to the basic foliar fertilizer, stirring and mixing to dissolve, to obtain the highly wettable rice foliar fertilizer.

[0021] Compared with the prior art, the beneficial effects of the present invention are: The present invention adds a specific surfactant to the conventional foliar fertilizer to form a stable solution, without affecting the original stability of the foliar fertilizer; at the same time, it greatly reduces the contact angle of the foliar fertilizer on the rice leaves, and even when diluted to 500 times, the contact angle is still less than 90°, making the foliar fertilizer better wetted on the rice leaves and not easy to slide off, thereby improving the absorption of the foliar fertilizer by rice. Description of the Drawings

[0022] Figure 1 It is a diagram of the contact angle measuring instrument device (left) and the effect of the foliar fertilizer dropped on the rice leaves (right) adopted in the embodiment of the present invention.

[0023] Figure 2 It is a diagram of the storage stability test result of the trace element water-soluble fertilizer obtained in Example 1.

[0024] Figures 3 - 7 They are respectively diagrams of the contact angle test results of 5 foliar fertilizers without adding fluorinated organosilicon polyether compounds (upper) and 5 improved foliar fertilizers (lower) on rice leaves.

[0025] Figure 8 It is a diagram of the storage stability test result of the trace element water-soluble fertilizer obtained in Example 2.

[0026] Figure 9 It is a diagram of the storage stability test result of the silicon-containing water-soluble fertilizer obtained in Comparative Example 2. Detailed Embodiments

[0027] The present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0028] The basic foliar fertilizer formula used in the following examples is shown in Table 1 below: Table 1

[0029]

[0030] Example 1

[0031] According to the basic foliar fertilizer formula in Table 1, it was scaled down by 10 times to prepare 111.8 g of amino acid (trace) water-soluble fertilizer stock solution, 122 g of amino acid (medium amount) water-soluble fertilizer stock solution, 100 g of silicon-containing water-soluble fertilizer stock solution, 130 g of organic water-soluble fertilizer stock solution, and 132 g of trace element water-soluble fertilizer stock solution. Then, 1% of organosilicon polyoxyethylene ether compound (agricultural organosilicon synergist RH-SE258, Zhejiang Runhe Organosilicon New Materials Co., Ltd., the polyether chain of the compound structure is located on the side chain of the polysiloxane) was added respectively, and heated and stirred at 40 °C for 30 min. After cooling for 24 h, the 5 foliar fertilizer solutions were still clear and transparent. The contact angle measurement device (left) and the effect of the foliar fertilizer dropped on the rice leaf (right) used for the contact angle test of the improved 5 foliar fertilizers are as Figure 1 shown. Among them, the contact angles of the undiluted amino acid (trace) water-soluble fertilizer and those diluted 100 times and 500 times are 0°, 17°, and 79° respectively; the contact angles of the undiluted amino acid (medium amount) water-soluble fertilizer and those diluted 100 times and 500 times are 0°, 0°, and 35° respectively; the contact angles of the undiluted organic water-soluble fertilizer and those diluted 100 times and 500 times are 0°, 23°, and 90° respectively; the contact angles of the undiluted silicon-containing water-soluble fertilizer and those diluted 100 times and 500 times are 12°, 47°, and 83° respectively; the contact angles of the undiluted trace element water-soluble fertilizer and those diluted 100 times and 500 times are 0°, 82°, and 96° respectively.

[0032] The storage stability test was carried out on the improved 5 foliar fertilizers: After storing at room temperature (7 °C to 37 °C) for 6 months, the foliar fertilizers were observed. The results showed that the amino acid (trace) water-soluble fertilizer stock solution, amino acid (medium amount) water-soluble fertilizer, silicon-containing water-soluble fertilizer, and organic water-soluble fertilizer still remained clear and transparent, while the trace element water-soluble fertilizer showed golden-yellow oil sticking to the wall and crystals precipitating at the bottom of the bottle (as Figure 2 shown).

[0033] Example 2

[0034] (1)Preparation of fluorinated organosilicon polyether compound: Hydroxyfluorosilicone oil with a viscosity of 60 mPa·s and an average molecular weight of 5000 (purchased commercially, D3F ring-opening oligomer) and hexamethylene diisocyanate were added to toluene solvent in a molar ratio of 1:2.1 and mixed and dissolved. Then it was heated to 50 - 55 °C and kept warm for reaction for 10 h. After measuring that the hydroxy content of the product was completely reacted, fluorosilicone oil capped with isocyanate was obtained. Then polyethylene glycol with an average molecular weight of 1500 was added, and the molar ratio of polyethylene glycol to hydroxyfluorosilicone oil was 2.3:1. The temperature was raised to 70 - 75 °C and kept warm for reaction for 12 h. After measuring that the isocyanate content of the product was completely reacted, toluene solvent was removed by vacuum recovery to obtain a fluorinated organosilicon polyether compound capped with polyether. The average molecular weight of the product was measured to be 9100.

[0035] (2)Amino acid (trace) water-soluble fertilizer stock solution, amino acid (medium amount) water-soluble fertilizer stock solution, silicon-containing water-soluble fertilizer stock solution, organic water-soluble fertilizer stock solution and trace element water-soluble fertilizer stock solution were respectively prepared according to the method of Example 1. Then 1% of the fluorinated organosilicon polyether compound was added respectively, and heated and stirred at 40 °C for 30 min. After cooling for 24 h, the 5 kinds of foliar fertilizer solutions were still clear and transparent. Contact angle tests were carried out on the improved 5 kinds of foliar fertilizers. Among them, the contact angles of the undiluted amino acid (trace) water-soluble fertilizer and those diluted 100 times and 500 times were 0°, 0°, 48° respectively; the contact angles of the undiluted amino acid (medium amount) water-soluble fertilizer and those diluted 100 times and 500 times were 0°, 0°, 0° respectively; the contact angles of the undiluted organic water-soluble fertilizer and those diluted 100 times and 500 times were 0°, 0°, 26° respectively; the contact angles of the undiluted silicon-containing water-soluble fertilizer and those diluted 100 times and 500 times were 0°, 27°, 60° respectively; the contact angles of the undiluted trace element water-soluble fertilizer and those diluted 100 times and 500 times were 0°, 0°, 78° respectively. The contact angle test results of the foliar fertilizer without adding fluorinated organosilicon polyether compound (upper) and the improved 5 kinds of foliar fertilizers (lower) on rice leaves are respectively as Figures 3 - 7 shown.

[0036] The storage stability test was carried out on the improved 5 kinds of foliar fertilizers: After storing at room temperature (7 °C - 37 °C) for 6 months, the situation of the foliar fertilizers was observed. The results showed that the amino acid (trace) water-soluble fertilizer stock solution, amino acid (medium amount) water-soluble fertilizer, silicon-containing water-soluble fertilizer, organic water-soluble fertilizer and trace element water-soluble fertilizer all remained clear and transparent. The appearance of the trace element water-soluble fertilizer after the stability test is as Figure 8 shown.

[0037] From the results of Examples 1 and 2, it can be seen that by adding a silicone polyether compound or a fluorinated silicone polyether compound surfactant to the foliar fertilizer in the present invention, the wetting contact angle on the rice leaf surface can be greatly reduced, which is beneficial to the absorption of the foliar fertilizer by the rice leaves. At the same time, it is further found that compared with the silicone polyether compound, the specific fluorinated silicone polyether compound of the present invention can further significantly reduce the wetting contact angle on the rice leaf surface, and the contact angles of 5 kinds of foliar fertilizers diluted to 500 times are all less than 90°. And compared with the silicone polyether compound, the specific fluorinated silicone polyether compound of the present invention has better stability for trace element water-soluble fertilizers.

[0038] Example 3

[0039] Compared with Example 2, in the preparation process of the fluorinated silicone polyether compound in this example, the molar ratio of polyethylene glycol to hydroxyfluorosilicone oil was adjusted to 1.5:1, and the rest was the same.

[0040] The results showed that the average molecular weight of the fluorinated silicone polyether compound obtained under the condition that the molar ratio of polyethylene glycol to hydroxyfluorosilicone oil was 1.5:1 was 21,500. After heating and stirring with the water-soluble fertilizer stock solution and then cooling for 24 h, the observation results showed that the amino acid (trace) water-soluble fertilizer, amino acid (medium amount) water-soluble fertilizer and organic water-soluble fertilizer could still maintain a clear and transparent state, but precipitation and stratification occurred in the silicon-containing water-soluble fertilizer and trace element water-soluble fertilizer. The contact angles of 3 stable foliar fertilizers were tested. The contact angles of the undiluted amino acid (trace) foliar fertilizer and those diluted 100 times and 500 times were 0°, 24°, and 80° respectively; the contact angles of the undiluted amino acid (medium amount) foliar fertilizer and those diluted 100 times and 500 times were 0°, 0°, and 42° respectively; the contact angles of the undiluted organic foliar fertilizer and those diluted 100 times and 500 times were 0°, 21°, and 95° respectively.

[0041] From the comparison results of this example and Example 2, it can be seen that when the molar ratio of polyethylene glycol to hydroxyfluorosilicone oil is lower than 2:1, the degree of polymerization of the obtained fluorinated silicone polyether compound increases, which causes some foliar fertilizers to become unstable after being added, and at the same time its wetting effect also becomes worse.

[0042] Comparative Example 1 Prepare the amino acid (trace) water-soluble fertilizer stock solution, amino acid (medium amount) water-soluble fertilizer stock solution, silicon-containing water-soluble fertilizer stock solution, organic water-soluble fertilizer stock solution, and trace element water-soluble fertilizer stock solution respectively according to the method of Example 1. Then add 1% of the non-ionic surfactant fatty alcohol polyoxyethylene ether (AEO), 1% of the anionic surfactant sodium dodecylbenzenesulfonate (SDBS), and 1% of the cationic surfactant octadecyltrimethylammonium chloride (OTAC) respectively, and stir and heat at 40 °C for 30 min. After cooling for 24 h, the foliar fertilizers are all unstable, with precipitation and stratification occurring respectively or there are attachments on the cup wall, indicating that the addition of conventional surfactants makes the foliar fertilizers unstable. The reason is that the conventional surfactants cause precipitation or agglomeration of metal salts in the foliar fertilizers, and subsequent dilution and contact angle tests are no longer carried out.

[0043] It can be seen from the results of this comparative example that the use of conventional surfactants will cause the foliar fertilizers to be unstable.

[0044] Comparative Example 2 Prepare the amino acid (trace) water-soluble fertilizer stock solution, amino acid (medium amount) water-soluble fertilizer stock solution, silicon-containing water-soluble fertilizer stock solution, organic water-soluble fertilizer stock solution, and trace element water-soluble fertilizer stock solution respectively according to the method of Example 1. Then add 1% of alkyl polyether modified fluorosilicone oil (purchased from Hubei Xinyuhong Biomedical Technology Co., Ltd., the chemical structure is that the polyether chain is located on the side chain of fluorinated polysiloxane) respectively, and stir and heat at 40 °C for 30 min. Observe whether the solution is still clear and transparent after cooling for 24 h. The results show that the amino acid (trace) water-soluble fertilizer, amino acid (medium amount) water-soluble fertilizer, silicon-containing water-soluble fertilizer, and organic water-soluble fertilizer can still maintain a clear and transparent state, but precipitation and stratification will occur in the trace element water-soluble fertilizer. Then conduct contact angle tests on the 4 stable foliar fertilizers. The contact angles of the undiluted amino acid (trace) foliar fertilizer and the foliar fertilizers diluted 100 times and 500 times are 0°, 86°, and 92° respectively; the contact angles of the undiluted amino acid (medium amount) foliar fertilizer and the foliar fertilizers diluted 100 times and 500 times are 0°, 117°, and 123° respectively; the contact angles of the undiluted organic foliar fertilizer and the foliar fertilizers diluted 100 times and 500 times are 0°, 108°, and 111° respectively; the contact angles of the undiluted silicon-containing foliar fertilizer and the foliar fertilizers diluted 100 times and 500 times are 57°, 80°, and 110° respectively.

[0045] Conduct a storage stability test on the 4 stable foliar fertilizers: Observe the situation of the foliar fertilizers after storing at room temperature (7 °C - 37 °C) for 6 months. The results show that the amino acid (trace) water-soluble fertilizer, amino acid (medium amount) water-soluble fertilizer, and organic water-soluble fertilizer all maintain a clear and transparent state, but a thin oil layer appears on the surface of the silicon-containing water-soluble fertilizer (insoluble stratification, but does not affect the state of the silicon fertilizer solution in the system, as Figure 9 shown).

[0046] It can be seen from the results of this comparative example that adding alkyl polyether modified fluorosilicone oil with different structures can reduce the contact angle, but diluting to 500 times cannot achieve the ideal effect. At the same time, it has an adverse effect on the stability of trace element water-soluble fertilizers. In addition, precipitation occurs during the storage of silicon-containing water-soluble fertilizers, which will lead to a decrease in effectiveness. The reason may be that the alkyl polyether modified fluorosilicone oil has strong hydrophobicity and weak hydrophilicity, resulting in a decrease in the compatibility stability with the silicon-containing water-soluble fertilizer.

[0047] Comparative Example 3 Compared with Example 2, the fluorinated organosilicon polyether compound in this comparative example was prepared by the following method: Polyethylene glycol with an average molecular weight of 1500 and hexamethylene diisocyanate were added to a toluene solvent in a molar ratio of 1:2.1 and mixed and dissolved. Then it was heated to 50 - 55 °C and kept warm for reaction for 10 h. After measuring that the hydroxyl content of the product was completely reacted, an isocyanate-terminated polyether was obtained. Then, a hydroxyl fluorosilicone oil (purchased commercially, D3F ring-opening oligomer) with a viscosity of 60 mPa·s and an average molecular weight of 5000 was added. The molar ratio of the hydroxyl fluorosilicone oil to polyethylene glycol was 2.3:1. The temperature was raised to 70 - 75 °C and continued to be kept warm for reaction for 12 h. After measuring that the isocyanate content of the product was completely reacted, a fluorinated organosilicon polyether compound terminated with polysiloxane was obtained. The average molecular weight of the product was measured to be 11300.

[0048] According to the method of Example 1, stock solutions of amino acid (trace) water-soluble fertilizer, amino acid (medium amount) water-soluble fertilizer, silicon-containing water-soluble fertilizer, organic water-soluble fertilizer and trace element water-soluble fertilizer were respectively prepared. Then, 1% of the fluorinated organosilicon polyether compound was added respectively, and stirred and heated at 40 °C for 30 min. After cooling for 24 h, a thin oil layer appeared on the liquid surface of all the foliar fertilizers, and subsequent dilution and contact angle tests were not carried out.

[0049] This comparative example further proves that there are significant differences in the compatibility of fluorinated organosilicon polyether compounds with different structures in foliar fertilizers. Among them, the oligomer structure with a hydrophobic fluorinated polysiloxane chain in the middle and hydrophilic polyether chains at both ends of the present invention has good compatibility with water-soluble fertilizers and can significantly improve the wettability of rice foliar fertilizers.

[0050] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A highly wetting rice foliar fertilizer, comprising a basic foliar fertilizer and a surfactant, characterized in that, The surfactant is an organosilicon polyether compound or a fluorinated organosilicon polyether compound.

2. The high-wetting rice foliar fertilizer according to claim 1, characterized in that, The mass of the surfactant is 0.5 - 5% of the mass of the basic foliar fertilizer.

3. The high-wetting rice foliar fertilizer according to claim 1, characterized in that, The fluorinated organosilicon polyether compound is a fluorinated organosilicon polyether compound prepared by the following method: React hydroxyl fluorosilicone oil with diisocyanate to obtain isocyanate-terminated fluorosilicone oil, and then react it with polyethylene glycol to obtain polyether-terminated fluorinated organosilicon polyether compound.

4. The high-wetting rice foliar fertilizer according to claim 3, characterized in that, The viscosity of the hydroxyl fluorosilicone oil is 50 - 100 mPa·s, and the average molecular weight is 3000 - 8000; the diisocyanate is any one of hexamethylene diisocyanate, toluene diisocyanate, p-phenylene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate; the molar ratio of the reaction of hydroxyl fluorosilicone oil to diisocyanate is 1:2 - 2.

2.

5. The high-wetting rice foliar fertilizer according to claim 3, characterized in that, The reaction of hydroxyl fluorosilicone oil with diisocyanate is carried out under the condition of an organic solvent, and the organic solvent is any one of toluene, N-methylpyrrolidone, N,N-dimethylformamide; the reaction temperature of the diisocyanate is 40 - 60 °C, and the reaction time is 6 - 20 h.

6. The high-wetting rice foliar fertilizer according to claim 3, characterized in that, The average molecular weight of the polyethylene glycol is 1000 - 2000; the molar ratio of polyethylene glycol to hydroxyl fluorosilicone oil is 2 - 2.5:1; the reaction temperature of the polyethylene glycol is 60 - 100 °C, and the reaction time is 6 - 20 h.

7. The high-wetting rice foliar fertilizer according to claim 1, characterized in that The basic foliar fertilizer is an amino acid water-soluble fertilizer, a silicon-containing water-soluble fertilizer, an organic water-soluble fertilizer or a micronutrient water-soluble fertilizer; the component composition ratio of the amino acid water-soluble fertilizer is any one of the following (1) or (2): (1) Glycine 8 - 15%, chelated manganese 1 - 2%, chelated zinc 10 - 15%, boric acid 0.2 - 0.5%, sorbitol 1 - 3%, the balance is water; (2) Glycine 8 - 15%, calcium nitrate tetrahydrate 10 - 20%, magnesium nitrate hexahydrate 5 - 10%, alkyl polyglycoside 0.5 - 2%, the balance is water; The component composition ratio of the silicon-containing water-soluble fertilizer is: potassium silicate 60 - 85%, the balance is water; The component composition ratio of the organic water-soluble fertilizer is: sodium molybdate 0.05 - 0.2%, potassium dihydrogen phosphate 5 - 10%, monoammonium phosphate 15 - 25%, urea 0.5 - 2%, glycolipid 10 - 20%, boric acid 0.1 - 0.5%, chelated zinc 10 - 25%, chelated manganese 0.2 - 0.5%, chelated copper 0.2 - 0.5%, citric acid 0.5 - 2%, alkyl polyglycoside 0.1 - 0.5%, the balance is water; The component composition ratio of the micronutrient water-soluble fertilizer is: boric acid 20 - 30%, ammonium nitrogen fertilizer 5 - 15%, chelated zinc 20 - 35%, chelated iron 1 - 2%, chelated copper 1 - 2%, chelated manganese 1 - 2%, sodium molybdate 0.1 - 1%, alkyl polyglycoside 0.1 - 0.2%, ethylene glycol 1 - 5%, citric acid 2 - 5%, the balance is water.

8. The preparation method of a highly wettable rice foliar fertilizer according to any one of claims 1 to 7, characterized in that, It includes the following steps: Add the surfactant to the basic foliar fertilizer, stir and mix to dissolve, and obtain a highly wettable rice foliar fertilizer.

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