A multifunctional anti-flocculation bio-based composite liquid silicon fertilizer and its synthesis method and application

Abstract

The present invention provides a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer and its synthesis method and application. The composite liquid silicon fertilizer of the present invention includes the following raw materials in mass fractions: 10-55 parts of soluble silicon, 1-2 parts of anti-flocculation bio-based stabilizer, 1-2 parts of bio-based organic solubilizer, 3-6 parts of synergist, 1-10 parts of bio-based buffer, 1-2 parts of ligand, and 80-120 parts of water. The raw materials of the silicon fertilizer of the present invention are easy to obtain and stable, and the use of bio-based components meets the needs of sustainable development; the preparation method is simple, easy to operate, the reaction conditions are easy to achieve, and it is safe and environmentally friendly. The prepared silicon fertilizer has good water solubility and stability, no flocculent precipitation is produced, low requirements for water quality, good resistance to hard water, and good compatibility; and the system is a buffer system, which can not only stabilize soluble silicon, but also ensure that soluble silicon is continuously converted into monosilicic acid, which is directly absorbed and utilized by crops, has good fertilizer efficiency, and can increase the silicon content of crops.

Description

Technical Field

[0001] The invention relates to a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer and a synthesis method and application thereof, and belongs to the field of green ecological agriculture. Background Art

[0002] Silicon (Si) is an essential trace element that is indispensable for maintaining normal life activities of the human body. It is mainly found in high-fiber foods, cereal husks, and root vegetables. After entering the digestive tract, silicon-containing foods are easily absorbed by the intestinal wall and transported to tissues throughout the body through lymph and blood. Silicon in the human body is mainly concentrated in bones, lungs, lymph nodes, pancreas, adrenal glands, nails, and hair. It is an essential component of the connective tissue and bones in the body.

[0003] Silicon is an important nutrient element in plant bodies and is listed as the fourth largest element after nitrogen, phosphorus and potassium fertilizers by the international soil community. Silicon fertilizer is beneficial to improving crop photosynthesis and chlorophyll content, making stems and leaves straight, promoting organic matter accumulation, increasing the mechanical strength of crop stems, making stems straight, and facilitating dense planting; it improves crop resistance to diseases and insect pests and reduces the occurrence of various diseases and insect pests. After crops absorb silicon, silicified cells can be formed in the plant body, which thickens the cell walls on the surface of stems and leaves, increases the cuticle, and forms a hard Silicon fertilizer can enhance the aeration of crops, prevent root rot and premature aging, and play an important role in preventing and controlling rice root rot. Silicon fertilizer can effectively regulate the opening and closing of leaf stomata and inhibit water transpiration, enhance crop resistance to drought, dry hot wind, cold and low temperature, etc. Silicon fertilizer can enhance pollen vitality of melon and fruit crops, and applying silicon fertilizer during the flowering period can significantly increase the yield rate. Silicon fertilizer can reduce the fixation of phosphate fertilizer in the soil, activate the phosphate in the soil and promote the absorption of phosphate by the root system, thus improving the utilization rate of phosphate fertilizer. Silicon fertilizer can enhance the crops' absorption and utilization of calcium and magnesium, and can regulate the crops' balanced absorption of different nutrients such as nitrogen, phosphorus, and potassium. It is called "plant regulating fertilizer."

[0004] In summary, silicon fertilizer is a very good quality fertilizer, health fertilizer and plant regulating fertilizer, which is unmatched by other chemical fertilizers. It can be used as a fertilizer to provide nutrients, and can also be used as a soil conditioner to improve the soil. In addition, it also has the functions of disease prevention, insect prevention and toxicity reduction. However, the silicon fertilizers currently on the market are mainly based on the strong alkaline system of sodium silicate and potassium silicate, which have high requirements for water quality and poor resistance to hard water. The neutral system will cause the stability of silicon fertilizer to drop sharply, and the compatibility of the system is poor, which hinders the better application of silicon fertilizer. Silicon fertilizer is easy to flocculate, the pH value is too high, etc., resulting in low fertilizer efficiency, poor stability and other usage problems. The development of more environmentally friendly, anti-flocculation, stable, low water quality requirements, good resistance to hard water, good compatibility, and good fertilizer efficiency of bio-based composite multifunctional liquid silicon fertilizers to meet the needs of green ecological agriculture has important social value. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a multifunctional anti-flocculating bio-based composite liquid silicon fertilizer and its synthesis method and application. The raw materials of the silicon fertilizer of the present invention are easily available and stable, and the bio-based components are used, which meets the needs of sustainable development; the preparation method is simple, easy to operate, the reaction conditions are easy to achieve, and it is safe and environmentally friendly. The prepared silicon fertilizer has good water solubility and stability, no flocculent precipitation is produced, low water quality requirements, good resistance to hard water, and good compatibility; and the system is a buffer system, which can not only stabilize the soluble silicon, but also ensure that the soluble silicon is continuously converted into monosilicic acid, which is directly absorbed and utilized by crops, has good fertilizer efficiency, and can increase the silicon content of crops.

[0006] The technical solution of the present invention is as follows:

[0007] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials in parts by weight: 10-55 parts of soluble silicon, 1-2 parts of an anti-flocculating bio-based stabilizer, 1-2 parts of a bio-based organic solubilizer, 3-6 parts of a synergist, 1-10 parts of a bio-based buffer, 1-2 parts of a ligand, and 80-120 parts of water.

[0008] Preferably, according to the present invention, the multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared by including the following raw materials in parts by mass: 55 parts of soluble silicon, 1 part of anti-flocculating bio-based stabilizer, 1 part of bio-based organic solubilizer, 5 parts of synergist, 1 part of bio-based buffer, 1 part of ligand, and 100 parts of water.

[0009] According to the present invention, the soluble silicon is preferably a water-soluble silicate; wherein the silicate is one of sodium silicate or potassium silicate, preferably potassium silicate.

[0010] According to the present invention, the anti-flocculation bio-based stabilizer is preferably one or a combination of two or more of sodium carboxymethyl cellulose, nanocellulose, bacterial cellulose, sodium alginate or sodium polyglutamate.

[0011] According to the present invention, the bio-based organic solubilizer is preferably one or a combination of two or more of bio-based coconut oleic acid imidazoline phosphate, linoleic acid imidazoline phosphate or tetrameric ricinoleic acid ester, preferably tetrameric ricinoleic acid ester.

[0012] Preferably, the preparation method of bio-based coconut oleic acid imidazoline phosphate or linoleic acid imidazoline phosphate comprises the steps of:

[0013] (1) Coconut oleic acid or linoleic acid and aminoethylethanolamine (AEEA) are fully mixed and reacted at 140-160° C. for 2-4 hours with stirring; then, the mixture is reacted at 190-210° C. for 3-5 hours with stirring, and finally, coconut oleic acid imidazoline or linoleic acid imidazoline is obtained by vacuum distillation; the molar ratio of coconut oleic acid or linoleic acid to aminoethylethanolamine is 1:1.2-1.4;

[0014] (2) Coconut oil imidazoline or linoleic acid imidazoline and 2-hydroxy-3-chloropropyl phosphate sodium salt are fully mixed, and stirred for reaction at 90-110° C. for 4-6 hours to obtain coconut oil imidazoline phosphate or linoleic acid imidazoline phosphate.

[0015] Preferably according to the present invention, the synergistic enhancer is one or a combination of two or more of thiourea, urea, potassium citrate or chitosan.

[0016] According to the present invention, the bio-based buffer is preferably one or a combination of two or more of potassium lignin sulfonate, sodium lignin sulfonate, fulvic acid, potassium fulvic acid, carboxymethyl chitosan or sodium gluconate.

[0017] Preferably according to the present invention, the ligand is one or a combination of two or more of dopamine, tannic acid, ethylenediaminetetraacetic acid (EDTA) or sodium thioglucosinate.

[0018] The synthesis method of the multifunctional anti-flocculating bio-based composite liquid silicon fertilizer comprises the steps of: fully dispersing soluble silicon and bio-based organic solubilizer in water, adding an anti-flocculating bio-based stabilizer, and reacting; adding a synergist, a bio-based buffer, and a ligand, reacting, and then filtering to obtain the multifunctional anti-flocculating bio-based composite liquid silicon fertilizer.

[0019] Preferably according to the present invention, the reaction temperature after adding the anti-flocculating bio-based stabilizer is room temperature, the reaction time is 1-2 hours, and the reaction is carried out under stirring conditions.

[0020] Preferably according to the present invention, the reaction temperature after adding the synergist, the bio-based buffer and the ligand is room temperature, the reaction time is 1-3 hours, and the reaction is carried out under stirring conditions.

[0021] The application of the above multifunctional anti-flocculation bio-based composite liquid silicon fertilizer in strawberry cultivation.

[0022] Preferably, according to the present invention, the application method is as follows: the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer is fully dispersed in water, and fertilization is performed by irrigation, and the mass ratio of the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer to water is 1:500-800; or, the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer is fully dispersed in water, and fertilization is performed by foliar spraying, and the mass ratio of the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer to water is 1:80-100.

[0023] The technical features and beneficial effects of the present invention are as follows:

[0024] 1. The present invention adopts bio-based organic solubilizers, so the silicate dissolution reaction can be completed at room temperature. The conditions are easy to achieve, the energy consumption is low, no special equipment is required, the cost is low, and it is more green and safe. It avoids the problems of high energy consumption, difficulty in implementation, the need for special equipment, and safety risks caused by high-temperature and high-pressure dissolution. The bio-based organic solubilizer of the present invention can cooperate with the buffer to adjust the pH value of the soil, promote the hydrolysis of silicon to form monosilicic acid, and further synergistically enhance the absorption of silicon by crops. The use of specific types of bio-based solubilizers in the present invention is conducive to improving the stability, anti-flocculation, fertilizer efficiency, etc. of silicon fertilizers, promoting crop growth, and increasing crop yields and silicon content.

[0025] 2. The bio-based stabilizer used in the silicon fertilizer of the present invention contains electron-rich groups such as carboxyl and hydroxyl, which can chelate and coordinate with metals in water and soil, effectively improve the problem of soil compaction, and stabilize soluble silicates from coordinating and precipitating with heavy metals, which can reduce the consumption of silicon by metals in the soil and improve the bioavailability of silicon; and the stabilizer is of bio-based origin, meeting the requirements of green development and sustainability. The use of a specific type of bio-based stabilizer of the present invention is conducive to improving the stability, anti-flocculation, fertilizer efficiency, etc. of silicon fertilizers, promoting crop growth, and increasing crop yields and silicon content.

[0026] 3. The synergist used in the silicon fertilizer of the present invention can supplement the necessary elements required for the growth of plant cell walls after silicon absorption in trace amounts, and prevent local malnutrition of plants caused by silicon absorption. The use of the specific type of synergist of the present invention is conducive to improving the fertilizer effect of silicon fertilizer, promoting crop growth, and increasing crop yield and silicon content.

[0027] 4. The bio-based buffer used in the present invention can adjust soil pH, promote the conversion of silicon, and slowly degrade into organic matter as silicon is absorbed, supplementing the nutrients needed for crop growth. The use of the specific type of bio-based buffer in the present invention is conducive to improving the fertilizer efficiency of silicon fertilizers, promoting crop growth, and increasing crop yields and silicon content.

[0028] 5. The ligand used in the present invention can coordinate and complex with calcium, magnesium, etc. in water, and cooperate with the stabilizer to improve the stability of silicon and promote the high-value utilization of silicon. The use of specific types of ligands in the present invention is conducive to improving the stability, anti-flocculation, fertilizer efficiency, etc. of silicon fertilizers, promoting crop growth, and increasing crop yields and silicon content.

[0029] 6. The anti-flocculation bio-based stabilizer, synergistic enhancer, bio-based buffer, and ligand raw materials of the present invention work together to ensure high-quality utilization of silicon through solubilization and complexation, while overcoming the flocculation problem of silicon under different water quality systems. The synergistic effect of different bio-based additives alleviates the soil compaction problem caused by long-term use of large amounts of element fertilizers, which is beneficial to soil recovery.

[0030] 7. The silicon fertilizer of the present invention adopts bio-based resources, is more environmentally friendly, meets the needs of sustainable development, effectively alleviates the problem of soil compaction caused by excessive nitrogen, phosphorus, potassium and other inorganic fertilizers, and effectively improves the soil; and the raw materials are easily available and stable, the preparation method is simple, the operation is simple, the reaction conditions are easy to achieve, safe and environmentally friendly, and a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer is constructed in one step.

[0031] 8. The silicon fertilizer of the present invention has good water solubility, good environmental stability, no flocculent precipitation, low water quality requirements, good hard water resistance, and good compatibility. The silicon fertilizer system of the present invention can better generate monosilicic acid. Plants absorb silicon in the form of monosilicic acid molecules. The silicon fertilizer system of the present invention can quickly promote the conversion of silicates to monosilicic acid. After crops absorb and utilize monosilicic acid, the silicon fertilizer system further promotes the reaction to the direction of monosilicic acid generation, which can more effectively stabilize silicon, promote silicon conversion and absorption, and has obvious effects on increasing crop yield and efficiency. The raw material composition of the present invention, as a whole, works synergistically to achieve the excellent effects of the present invention; the omission or replacement of any raw material, or the inappropriate ratio of the raw materials, will reduce the effect of the resulting silicon fertilizer. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to specific embodiments, but is not limited thereto.

[0033] Meanwhile, the synthesis methods described in the following examples are conventional methods unless otherwise specified; the raw materials described are commercially available unless otherwise specified.

[0034] In the embodiment, coconut oil imidazoline phosphate is prepared by the following method:

[0035] 1) Synthesis of Coconut Oil Imidazolinyl:

[0036] Bio-based fatty acid coconut oil acid and aminoethylethanolamine (AEEA) were fully and evenly mixed at a molar ratio of 1:1.3, and stirred at 150°C for 3 hours; then dehydration cyclization was stirred at 200°C for 4 hours, and finally coconut oil acid imidazoline was obtained by vacuum distillation.

[0037] 2) Synthesis of coconut oil imidazoline phosphate:

[0038] Coconut oil imidazoline and 2-hydroxy-3-chloropropyl phosphate sodium salt were fully mixed in a molar ratio of 1:1, stirred and reacted at 100° C. for 5 hours, and then cooled to room temperature to obtain coconut oil imidazoline phosphate.

[0039]

[0040] Sodium carboxymethyl cellulose, Mw ~ 250000; potassium lignin sulfonate, available from Shenyang Xingzhenghe Chemical Co., Ltd.; sodium lignin sulfonate, available from Shandong Yuquan New Materials Technology Co., Ltd.; fulvic acid, available from Shijiazhuang Jilu Fertilizer Co., Ltd.; nanocellulose, available from Wuhan Lanabai Pharmaceutical Chemical Co., Ltd.

[0041] Example 1

[0042] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 55 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer coconut oil imidazoline phosphate, 5 kg of synergistic enhancer potassium citrate, 1 kg of bio-based buffer potassium lignin sulfonate, 1 kg of ligand tannic acid, and 100 kg of water.

[0043] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0044] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0045] Example 2

[0046] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 40 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer coconut oil imidazoline phosphate, 5 kg of synergistic enhancer potassium citrate, 1 kg of bio-based buffer potassium lignin sulfonate, 1 kg of ligand tannic acid, and 100 kg of water.

[0047] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0048] At room temperature, 40 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0049] Example 3

[0050] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 10 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer coconut oil imidazoline phosphate, 5 kg of synergistic enhancer thiourea, 1 kg of bio-based buffer potassium lignin sulfonate, 1 kg of ligand tannic acid, and 100 kg of water.

[0051] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0052] At room temperature, 10 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0053] Example 4

[0054] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 55 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer coconut oil imidazoline phosphate, 5 kg of synergistic enhancer potassium citrate, 1 kg of bio-based buffer sodium lignin sulfonate, 1 kg of ligand tannic acid, and 100 kg of water.

[0055] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0056] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0057] Example 5

[0058] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 55 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer tetrapolyricinoleate, 5 kg of synergist potassium citrate, 1 kg of bio-based buffer potassium lignin sulfonate, 1 kg of ligand tannic acid, and 100 kg of water.

[0059] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0060] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0061] Example 6

[0062] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 55 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer coconut oil imidazoline phosphate, 5 kg of synergistic enhancer potassium citrate, 1 kg of bio-based buffer potassium lignin sulfonate, 1 kg of ligand dopamine, and 100 kg of water.

[0063] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0064] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0065] Example 7

[0066] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 55 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer coconut oil imidazoline phosphate, 5 kg of synergist potassium citrate, 1 kg of bio-based buffer fulvic acid, 1 kg of ligand tannic acid, and 100 kg of water.

[0067] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0068] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0069] Example 8

[0070] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared from the following raw materials: 55 kg of soluble potassium silicate, 1 kg of anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose, 1 kg of bio-based organic solubilizer coconut oil imidazoline phosphate, 5 kg of synergistic enhancer potassium citrate, 1 kg of bio-based buffer potassium lignin sulfonate, 1 kg of ligand EDTA, and 100 kg of water.

[0071] The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer comprises the following steps:

[0072] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a multifunctional anti-flocculation bio-based composite liquid silicon fertilizer.

[0073] Example 9

[0074] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is as described in Example 1, except that the anti-flocculating bio-based stabilizer sodium carboxymethyl cellulose is replaced by nanocellulose; and the other raw material compositions are the same as those in Example 1.

[0075] The synthesis method of the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer is the same as that of Example 1.

[0076] Example 10

[0077] A multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is as described in Example 1, except that the synergistic enhancer potassium citrate is replaced by urea; and the other raw material compositions are the same as those in Example 1.

[0078] The synthesis method of the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer is the same as that of Example 1.

[0079] Comparative Example 1

[0080] A composite liquid silicon fertilizer, as described in Example 1, except that the anti-flocculation bio-based stabilizer sodium carboxymethyl cellulose is not added; the other raw material compositions are the same as those in Example 1.

[0081] The synthesis method of the composite liquid silicon fertilizer comprises the following steps:

[0082] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred at room temperature for 1 hour and filtered to obtain a composite liquid silicon fertilizer.

[0083] Comparative Example 2

[0084] A composite liquid silicon fertilizer, as described in Example 1, except that the bio-based organic solubilizer coconut oil imidazoline phosphate is not added; the other raw material compositions are the same as those in Example 1.

[0085] The synthesis method of the composite liquid silicon fertilizer comprises the following steps:

[0086] At room temperature, 55 kg of soluble potassium silicate was fully dissolved in 100 kg of water, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist, 1 kg of bio-based buffer, and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a composite liquid silicon fertilizer.

[0087] Comparative Example 3

[0088] A composite liquid silicon fertilizer, as described in Example 1, except that potassium citrate, a synergistic enhancer, is not added; other raw material compositions are the same as those in Example 1.

[0089] The synthesis method of the composite liquid silicon fertilizer comprises the following steps:

[0090] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 1 kg of bio-based buffer and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a composite liquid silicon fertilizer.

[0091] Comparative Example 4

[0092] A composite liquid silicon fertilizer, as described in Example 1, except that the bio-based buffer potassium lignin sulfonate is not added; the other raw material compositions are the same as those in Example 1.

[0093] The synthesis method of the composite liquid silicon fertilizer comprises the following steps:

[0094] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist and 1 kg of ligand were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a composite liquid silicon fertilizer.

[0095] Comparative Example 5

[0096] A composite liquid silicon fertilizer, as described in Example 1, except that the ligand tannic acid is not added; the other raw material compositions are the same as those in Example 1.

[0097] The synthesis method of the composite liquid silicon fertilizer comprises the following steps:

[0098] At room temperature, 55 kg of soluble potassium silicate and 1 kg of bio-based organic solubilizer were added to 100 kg of water, and after stirring until the solution was clarified, 1 kg of anti-flocculation bio-based stabilizer was added, and the mixture was stirred and reacted at room temperature for 1 hour; 5 kg of synergist and 1 kg of bio-based buffer were added, and the mixture was stirred and reacted at room temperature for 1 hour, and then filtered to obtain a composite liquid silicon fertilizer.

[0099] Comparative Example 6

[0100] A silicon fertilizer, as described in Example 1, except that no anti-flocculating bio-based stabilizer, bio-based organic solubilizer, synergist, bio-based buffer, or ligand is added; other raw material compositions are the same as in Example 1.

[0101] The synthesis method of the silicon fertilizer comprises the following steps:

[0102] At room temperature, 55 kg of soluble potassium silicate is fully dissolved in 100 kg of water to obtain silicon fertilizer.

[0103] Test example

[0104] 1. Strawberry field trial

[0105] Test samples: silicon fertilizers prepared in Examples and Comparative Examples.

[0106] Test method: fully disperse polysilicon fertilizer in water, with the mass ratio of silicon fertilizer to water being 1:700. Use the diluted liquid silicon fertilizer for drip irrigation every 3 days during the strawberry seedling stage. After the strawberry is grown, drip irrigation is performed once during the initial flowering stage, the initial fruiting stage, and the peak fruiting stage (5-10 kg / mu). At the same time, drip irrigation of calcium silicate or potassium phosphate is performed as a control group according to the above method.

[0107] After the strawberries matured, the yield increase rate of the strawberries (compared with the yield increase rate of comparative example 6), the average dry weight of the 100 leaves, and the average silicon content of the strawberry fruits were tested.

[0108] Effect on strawberry growth: After applying the silicon fertilizer prepared in the embodiment of the present invention, the strawberry fruits are significantly enlarged, with a bright red, round and shiny appearance. At the same time, the strawberry fruits also have a certain resistance to diseases such as powdery mildew and viral diseases. The plants are more robust and resistant to lodging, the leaves are more stiff, and the yield is greatly increased.

[0109] 2. Hard water resistance test method: use anhydrous CaCl 2 and NaHCO 3 Preparation of Ca 2+ High concentration hard water with a concentration of 1000 mg / L (including NaHCO 3 The concentration is 1000 mg / L). The prepared silicon fertilizer was added into hard water (the mass ratio of silicon fertilizer to hard water was 1:500), stirred at room temperature for 30 min, and the flocculation and precipitation were observed.

[0110] Table 1 Comparison of the effects of silicon fertilizers in the examples and comparative examples during strawberry use is as follows:

[0111]

[0112]

[0113] It can be seen from the table that the silicon fertilizer prepared by the embodiment of the present invention has excellent hard water resistance and low water quality requirements; the silicon content in the strawberry prepared by the silicon fertilizer of the embodiment of the present invention is significantly increased, the plant is more robust, and the yield is greatly increased; after being absorbed, monosilicic acid is enriched on the cell wall, making the fruit more resistant to storage and obtaining silicon elements that are beneficial to the human body.

Claims

1. A multifunctional anti-flocculation bio-based composite liquid silicon fertilizer, characterized in that: The raw materials are prepared by the following weight parts: 40-55 parts of soluble silicon, 1-2 parts of anti-flocculation bio-based stabilizer, 1-2 parts of bio-based organic solubilizer, 3-6 parts of synergist, 1-10 parts of bio-based buffer, 1-2 parts of ligand, and 80-120 parts of water; Soluble silicon is a silicate soluble in water; wherein the silicate is one of sodium silicate or potassium silicate; the anti-flocculation bio-based stabilizer is one of sodium carboxymethyl cellulose, nanocellulose, bacterial cellulose, sodium alginate or sodium polyglutamate, or a combination of two or more thereof; the bio-based organic solubilizer is one of bio-based coconut oil imidazoline phosphate, linoleic acid imidazoline phosphate or tetrapolyricinoleic acid ester, or a combination of two or more thereof; the synergist is one of urea or potassium citrate; the bio-based buffer is one of potassium lignin sulfonate, sodium lignin sulfonate, fulvic acid, potassium fulvic acid, carboxymethyl chitosan or sodium gluconate, or a combination of two or more thereof; the ligand is one of dopamine, tannic acid, ethylenediaminetetraacetic acid (EDTA) or sodium thiogluconate, or a combination of two or more thereof.

2. The multifunctional anti-flocculation bio-based composite liquid silicon fertilizer according to claim 1, characterized in that: The multifunctional anti-flocculating bio-based composite liquid silicon fertilizer is prepared by including the following raw materials in parts by weight: 55 parts of soluble silicon, 1 part of an anti-flocculating bio-based stabilizer, 1 part of a bio-based organic solubilizer, 5 parts of a synergist, 1 part of a bio-based buffer, 1 part of a ligand, and 100 parts of water.

3. The multifunctional anti-flocculation bio-based composite liquid silicon fertilizer according to claim 1, characterized in that: The preparation method of bio-based coconut oil imidazoline phosphate or linoleic acid imidazoline phosphate comprises the steps of: (1) Coconut oleic acid or linoleic acid and aminoethylethanolamine (AEEA) are fully mixed and reacted at 140-160° C. for 2-4 hours with stirring; then, the mixture is reacted at 190-210° C. for 3-5 hours with stirring, and finally, coconut oleic acid imidazoline or linoleic acid imidazoline is obtained by vacuum distillation; the molar ratio of coconut oleic acid or linoleic acid to aminoethylethanolamine is 1:1.2-1.4; (2) Coconut oil imidazoline or linoleic acid imidazoline and 2-hydroxy-3-chloropropyl phosphate sodium salt are fully mixed, and stirred for reaction at 90-110° C. for 4-6 hours to obtain coconut oil imidazoline phosphate or linoleic acid imidazoline phosphate.

4. The method for synthesizing the multifunctional anti-flocculating bio-based composite liquid silicon fertilizer according to any one of claims 1 to 3 comprises the steps of: fully dispersing soluble silicon and bio-based organic solubilizer in water, adding an anti-flocculating bio-based stabilizer, and reacting; adding a synergist, a bio-based buffer, and a ligand, reacting, and then filtering to obtain the multifunctional anti-flocculating bio-based composite liquid silicon fertilizer.

5. The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer according to claim 4, characterized in that: The reaction temperature after adding the anti-flocculation bio-based stabilizer is room temperature, the reaction time is 1-2 hours, and the reaction is carried out under stirring conditions.

6. The method for synthesizing the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer according to claim 4, characterized in that: The reaction temperature after adding the synergist, the bio-based buffer and the ligand is room temperature, the reaction time is 1-3 hours, and the reaction is carried out under stirring conditions.

7. Use of the multifunctional anti-flocculating bio-based composite liquid silicon fertilizer according to any one of claims 1 to 3 in strawberry planting.

8. The use according to claim 7, characterized in that: The application method is as follows: fully disperse the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer in water, and apply fertilizer by irrigation. The mass ratio of the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer to water is 1:500-800; or, fully disperse the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer in water, and apply fertilizer by foliar spraying. The mass ratio of the multifunctional anti-flocculation bio-based composite liquid silicon fertilizer to water is 1:80-100.

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