Multifunctional trace element compound fertilizer

Abstract

The invention relates to the technical field of foliar fertilizers, in particular to a multifunctional trace element compound fertilizer which comprises the following components in percentage by mass: 1.68% of organic chelated zinc, 0.1% of organic chelated chromium Cr < 3 + >, 0.015% of organic chelated germanium, 12.12% of selenium polysaccharide and 86.085% of water. The fertilizer integrates selenium, germanium, chromium, zinc and other trace elements required by a human body and medium elements required by plants, can be applied to crops to balance and supplement the trace elements for the human body, achieves the purpose of increasing the yield of the crops, not only meets the growth requirements of the crops, but also achieves the purpose of balance and supplement of the trace elements for the human body, and has a wide application prospect. According to the present invention, with the application of the fertilizer, the absorption and the utilization of the crops on the nutrient elements in the soil can be effectively promoted, the crops can enrich and convert the trace elements such as selenium, germanium, chromium, zinc and the like during the growth process, such that the consumers can easily ingest the scarce and necessary trace elements through the daily diet, and the trace element deficiency problem caused by the unbalanced diet of the modern people can be effectively alleviated.

Description

Technical Field

[0001] The invention relates to the technical field of foliar fertilizers, in particular to a multifunctional trace element compound fertilizer. Background Art

[0002] Selenium is one of the eight essential trace elements for humans and animals that is recognized by the World Health Organization as an undisputed necessity by scientific institutions around the world. It has the functions of scavenging free radicals, anti-oxidation (50-500 times that of vitamin E), anti-aging, anti-radiation, detoxification of heavy metals (mercury, lead, cadmium) and inhibiting the production of lipid peroxides, enhancing immune function and other biological activities. my country is internationally recognized as a selenium-deficient area, and 72% of the country's land is selenium-poor or selenium-deficient soil. The Chinese Nutrition Association recommends that adults take 50-200ug / d of selenium. The daily selenium intake of Chinese residents is far from the recommended minimum limit of 50ug. Food supplementation of selenium is the best way for humans to supplement selenium. Many experts Actively call for strengthening the work of food selenium supplementation, hoping that selenium-rich foods will enter people's lives as soon as possible. Organic germanium is almost non-toxic, has the ability to induce its own interference factors, and has anti-tumor, blood pressure lowering, anti-aging, prevention and treatment of arteriosclerosis, liver protection, anti-radiation, promotion of hematopoietic function, anti-osteoporosis, treatment of rheumatoid arthritis, especially enhancing the vitality of brain cells, preventing cerebellar atrophy, and at the same time has excellent inhibitory effects on cardiovascular and cerebrovascular diseases, arteriosclerosis, malignant tumors and other diseases in the middle-aged and elderly people; organic germanium compounds, first of all, Ge-132 spirogermanium has been shown to be another potential weapon for humans to prevent and defeat cancer. The important role of trace element chromium (Cr) on the human body is increasingly revealed. Chromium can promote pancreatic islet Chromium has the function of balancing serum cholesterol, promoting protein metabolism and growth and development, and also plays an important role in nucleic acid metabolism. Chromium deficiency will cause growth and development stagnation. Chromium has two main forms: trivalent chromium and hexavalent chromium. Trivalent chromium is an essential trace element for the body, while hexavalent chromium is a harmful substance that can cause acute inflammation and gastrointestinal problems. Long-term exposure may lead to tumors, especially intestinal and oral tumors. The pollution mainly comes from chromium mining and industrial emissions. Some Chinese herbal medicines are sources of chromium. Chinese herbal medicines used to promote blood circulation and remove blood stasis contain higher amounts of chromium, such as Salvia miltiorrhiza and Ilex pubescens used to treat coronary heart disease; Chinese herbal medicines that promote digestion and metabolism also contain higher amounts of chromium, such as Crataegus pinnatifida and Rhizoma Cibotii that enhance digestion. , Millettia repens, etc. Many Chinese herbal medicines for anti-tumor also contain high amounts of chromium, such as Lobelia, Scutellaria barbata, and Glechoma longituba. Zinc (Zn) is one of the essential trace elements in the growth and development of animals and plants. In plants, zinc is a component of many enzymes and plays an important role in protein synthesis, carbohydrate metabolism, cell division, gene expression and other processes. When plants are zinc deficient, they often grow short and slow. At the same time, zinc is also closely related to human health. Zinc can resist aging, fatigue, regulate endocrine, and enhance the body's immunity. Zinc plays a vital role in the body's sexual development, sexual function, and the formation of reproductive cells, so it is known as the "spark of life" and "marital harmony factor";The human body cannot synthesize zinc by itself and can only supplement it through food. When the human body consumes more than 15 mg of zinc per day, it can meet the needs of normal life activities. Therefore, it is very important to increase the zinc content in food. Chinese medicine agriculture is the direction of future agricultural development. "Chinese medicine agriculture" is to apply Chinese medicine principles and methods to the agricultural field, to achieve cross-border integration of modern agriculture and traditional Chinese medicine, complementary advantages, and integrated innovation. "Chinese medicine agriculture" is to apply Chinese medicine ideas and Chinese medicine technologies, products and solutions, combined with modern science and technology, industrialized production materials and modern management ideas and methods, to innovate modern agricultural production methods and promote traditional agriculture "quality improvement". , increase production, and increase efficiency" transformation and upgrading and sustainable development, innovative modern ecological and healthy agriculture with Chinese characteristics, the natural ecological fertilizer "Kanfang nutrient solution" used in Japan's natural farming method, the "Chinese medicine fertilizer" and multifunctional trace element compound fertilizer used in our traditional Chinese medicine agriculture are richer in Chinese herbal functional ingredients and essential trace elements for the human body, and can better meet the needs of plants for trace nutrition, functional conditioning and disease prevention and resistance. Chinese medicine agriculture is to make Chinese medicinal materials and agricultural products nutritious, functional and life-oriented, while improving their therapeutic effects and shortening their treatment cycles, meeting people's urgent treatment needs for common diseases and chronic diseases, and achieving the goal of health and longevity.;

[0003] Foliar fertilizer is a fertilizer that aims at leaf absorption and applies the nutrients needed by crops directly to the leaves. Ye Tianshi Medicine Valley's multifunctional trace element compound fertilizer organically combines the essential trace elements for the human body and applies them to the surface of crop leaves. It is a type of fertilizer that exerts its function through absorption by the leaves. Plant leaves have two layers of epidermis, consisting of epidermal cells. The outside of the epidermal cells has a cuticle and wax, which can protect the mesophyll cells under the epidermal tissue from performing photosynthesis, respiration and other functions, and are not affected by adverse external conditions. There are also many tiny pores on the surface of the leaves. These tiny pores not only perform the function of gas exchange but also facilitate the entry of nutrients. They are the main channel for plants to absorb compound fertilizers. Ye Tianshi Yaogu Chinese herbal medicine multifunctional trace element compound fertilizer is a supplement to plant absorption of nutrients to make up for the lack of root absorption of trace elements and nutrients. When it is inconvenient to fertilize the crops at the root, such as in the late stage of crop growth, the root vitality declines and the ability to absorb fertilizer is reduced; or when the soil environment is not conducive to crop growth, such as excessive water, drought, excessive acidity or alkalinity of the soil, the root absorption of crops is blocked, and the crops need to resume growth quickly. If the root application method cannot meet the needs of crops in time, only foliar spraying can quickly supplement nutrients to meet the needs of crop growth and development. However, most of the trace element foliar fertilizers on the market are single selenium fertilizers, germanium fertilizers, or zinc fertilizers, and the agricultural products produced are limited to one or two functional trace element components, which cannot meet people's needs for trace element supplementation. For this reason, the market urgently requires a multifunctional medium and trace element compound fertilizer to produce Chinese medicinal materials and functional agricultural products rich in selenium, germanium, chromium, zinc and other nutrients and balanced to solve the most lacking nutritional needs of the human body.

[0004] Therefore, in view of the problem that the above-mentioned foliar fertilizers are mostly single selenium fertilizers, germanium fertilizers, or zinc fertilizers, and the agricultural products produced are limited to one or two functional trace element components, which cannot meet people's needs for trace element supplementation, a multifunctional trace element compound fertilizer can be designed. Summary of the invention

[0005] In order to overcome the problem that foliar fertilizers are mostly single selenium fertilizers, germanium fertilizers, or zinc fertilizers, the agricultural products produced are limited to one or two functional trace element components and cannot meet people's needs for trace element supplementation.

[0006] The technical scheme of the present invention is as follows: the multifunctional trace element compound fertilizer comprises the following components by mass percentage: organic chelated zinc: 1.68%, organic chelated chromium Cr 3+ : 0.1%, organic chelated germanium: 0.015%, selenium polysaccharide 12.12%, water: 86.085%.

[0007] Preferably, purified water is used.

[0008] Preferably, the production process of selenium polysaccharide is as follows:

[0009] (1) Carrageenan degradation: Carrageenan is prepared into a sol at 80°C, and hydrochloric acid solution is added under stirring and fully reacted to obtain a small molecule carrageenan with a molecular weight of 300 to 1000 Daltons;

[0010] (2) Selenization reaction: add selenious acid or its salt and calcium salt to the above-mentioned small molecule carrageenan solution, heat to 30-80° C., and react at constant temperature for 8-14 hours to generate selenized polysaccharide compounds. After the reaction is completed, cool the reaction solution to room temperature;

[0011] (3) Removing CASO4: Centrifuging the reaction solution to remove the generated CASO4;

[0012] (4) Neutralizing the acidic solution: Use a base containing potassium ions to adjust the pH to 3-9 and stir to promote the reaction;

[0013] (5) Nanofiltration membrane filtration: The reaction solution is filtered through a nanofiltration membrane, and the filtrate is collected to obtain small molecule selenized carrageenan;

[0014] (6) Purification: The filtrate in step (5) is concentrated or dried to obtain a solid product.

[0015] Preferably, the concentration of the sol in step (1) is 0.1-2%, the reaction temperature is 30-100° C., and the reaction time is 3-5 h.

[0016] As a preferred embodiment, organic chelated zinc, organic chelated chromium Cr 3+ The production process of organic chelated germanium is as follows:

[0017] (1) Material preparation: inorganic zinc, inorganic chromium, inorganic germanium, organic ligand: ethylenediaminetetraacetic acid;

[0018] (2) Dissolving: Dissolve the inorganic zinc in water and stir until completely dissolved;

[0019] (3) Adding organic ligand: slowly adding organic ligand while continuously stirring the mixed solution;

[0020] (4) Adjusting the pH value: Using an acid or a base to adjust the pH value of the solution as needed to promote the chelation reaction;

[0021] (5) Reaction time: Keep stirring and allow the reaction to proceed for 1 to 2 hours;

[0022] (6) Separation and purification: After the reaction is completed, the chelate is separated to obtain organic chelated zinc. Similarly, organic chelated chromium Cr is prepared. 3+ and organic chelated germanium;

[0023] Preferably, the method of separating the chelate includes but is not limited to filtration, evaporation, and crystallization.

[0024] The present invention also provides a method for preparing a multifunctional trace element compound fertilizer, the steps of which are as follows:

[0025] Step 1: Prepare the required weight of organic chelated zinc and organic chelated chromium according to the formula ratio. 3+ , organic chelated germanium, selenium polysaccharide and water;

[0026] Step 2: Organic chelated zinc, organic chelated chromium Cr 3+ , organic chelated germanium and selenium polysaccharides are dissolved in water and prepared into liquid fertilizer.

[0027] Preferably, the method of use is: spray 3 times 6 to 8 months before harvest, 1 liter per mu of land each time, dilute 30 to 50 times and spray on the leaves, with an interval of more than 2 months between two sprayings.

[0028] The beneficial effects of the invention are as follows: the invention integrates trace elements required by the human body, such as selenium, germanium, chromium, zinc, and the medium elements required by plants. When applied to crops, the invention can realize the balanced supplementation of trace elements by the human body, and at the same time achieve the purpose of increasing crop yields, thereby enhancing the pharmacological value and health benefits of Chinese herbal medicines to solve the most lacking nutritional needs of the human body. The invention aims to maximize the power of natural elements through scientific proportioning, thereby meeting the needs of crop growth and achieving the goal of balanced supplementation of trace elements for the human body, showing the dual advantages of excellent health benefits and increased agricultural production. In the process of crop planting, the compound fertilizer can effectively promote the absorption and utilization of nutrients in the soil by crops, thereby improving crop yields and quality. More importantly, these crops can enrich and transform selenium and germanium during their growth. , chromium, zinc and other trace elements, making the final harvested agricultural products rich in these nutrients that are essential to human health. Consumers can easily ingest these scarce and necessary trace elements through their daily diet, effectively alleviating the problem of trace element deficiency caused by unbalanced diet of modern people. Especially for Chinese herbal medicines, the application of this compound fertilizer can significantly enhance their pharmacological value and health benefits. The active ingredients in Chinese herbal medicines are often closely related to the content of trace elements. The precise supplementation of this compound fertilizer can further optimize the effective ingredient structure of Chinese herbal medicines, enhance their therapeutic effects and health functions, and not only solve the technical problems of increasing crop yields and improving quality, but also meet the urgent needs of modern people for healthy diets and balanced supplementation of trace elements with its unique formula and excellent effects.

[0029] "Selenium polysaccharide" is a polysaccharide organic selenium nutrient enhancer made from marine algae extracts through molecular replacement technology. Selenium polysaccharide foliar fertilizer is a new type of technical product that is innovatively upgraded on the basis of the patented technology of selenized carrageenan. It is an organic selenium foliar fertilizer specially used for selenium-rich agriculture. Its advantages are: organic selenium content> 90%, high conversion rate; small molecule selenium polysaccharide, easy to absorb; safe and reliable, without any toxic side effects; reduced heavy metal content and pesticide residues;

[0030] Organic chelated zinc is made of organic matter chelate, with an absorption and utilization rate of over 90%, and its efficacy is much higher than that of general inorganic zinc fertilizer;

[0031] Organic chelated chromium is made by chelating organic matter and is a trivalent Cr 3+ , the absorption and utilization rate is over 90%;

[0032] Organic chelated germanium is made by chelating organic matter, and its absorption and utilization rate is over 90%. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the embodiments.

[0034] Example 1

[0035] The present invention provides an embodiment: a multifunctional trace element compound fertilizer, which comprises the following components by mass percentage: organic chelated zinc: 1.68%, organic chelated chromium Cr 3+ : 0.1%, organic chelated germanium: 0.015%, selenium polysaccharide 12.12%, water: 86.085%.

[0036] Preferably, purified water is used.

[0037] Preferably, the production process of selenium polysaccharide is as follows:

[0038] (1) Carrageenan degradation: Carrageenan was prepared into a 0.1% sol at 80°C, and hydrochloric acid solution was added under stirring and fully reacted at a reaction temperature of 30°C and a reaction time of 3 hours to obtain a small molecule carrageenan with a molecular weight of 300 to 1000 Daltons;

[0039] (2) Selenization reaction: add selenious acid or its salt and calcium salt to the above-mentioned small molecule carrageenan solution, heat to 30°C, and react at constant temperature for 8 hours to generate selenized polysaccharide compounds. After the reaction is completed, cool the reaction solution to room temperature;

[0040] (3) Removing CASO4: Centrifuging the reaction solution to remove the generated CASO4;

[0041] (4) Neutralizing the acidic solution: Adjust the pH to 3.1 with a base containing potassium ions and stir to promote the reaction;

[0042] (5) Nanofiltration membrane filtration: The reaction solution is filtered through a nanofiltration membrane, and the filtrate is collected to obtain small molecule selenized carrageenan;

[0043] (6) Purification: The filtrate in step (5) is concentrated or dried to obtain a solid product.

[0044] As a preferred embodiment, organic chelated zinc, organic chelated chromium Cr 3+ The production process of organic chelated germanium is as follows:

[0045] (1) Material preparation: inorganic zinc, inorganic chromium, inorganic germanium, organic ligand: ethylenediaminetetraacetic acid;

[0046] (2) Dissolving: Dissolve the inorganic zinc in water and stir until completely dissolved;

[0047] (3) Adding organic ligand: slowly adding organic ligand while continuously stirring the mixed solution;

[0048] (4) Adjusting the pH value: Using an acid or a base to adjust the pH value of the solution as needed to promote the chelation reaction;

[0049] (5) Reaction time: Keep stirring and allow the reaction to proceed for 1 h;

[0050] (6) Separation and purification: After the reaction is completed, the chelate is separated to obtain organic chelated zinc. Similarly, organic chelated chromium Cr is prepared. 3+ and organic chelated germanium;

[0051] Preferably, the method of separating the chelate includes but is not limited to filtration, evaporation, and crystallization.

[0052] The present invention also provides a method for preparing a multifunctional trace element compound fertilizer, the steps of which are as follows:

[0053] Step 1: Prepare the required weight of organic chelated zinc and organic chelated chromium according to the formula ratio. 3+ , organic chelated germanium, selenium polysaccharide and water;

[0054] Step 2: Organic chelated zinc, organic chelated chromium Cr 3+ , organic chelated germanium and selenium polysaccharides are dissolved in water and prepared into liquid fertilizer.

[0055] Preferably, the method of use is: spray 3 times 6 months before harvest, 1 liter per mu each time, dilute 30 times and spray on the leaves, with an interval of more than 2 months between two sprayings.

[0056] Example 2

[0057] The present invention provides an embodiment: a multifunctional trace element compound fertilizer, which comprises the following components by mass percentage: organic chelated zinc: 1.68%, organic chelated chromium Cr 3+ : 0.1%, organic chelated germanium: 0.015%, selenium polysaccharide 12.12%, water: 86.085%.

[0058] Preferably, purified water is used.

[0059] Preferably, the production process of selenium polysaccharide is as follows:

[0060] (1) Carrageenan degradation: Carrageenan was prepared into a 2% sol at 80°C, and hydrochloric acid solution was added under stirring and fully reacted at a reaction temperature of 100°C and a reaction time of 5 hours to obtain a small molecule carrageenan with a molecular weight of 300 to 1000 Daltons;

[0061] (2) Selenization reaction: add selenious acid or its salt and calcium salt to the above-mentioned small molecule carrageenan solution, heat to 80°C, and react at constant temperature for 14 hours to generate selenized polysaccharide compounds. After the reaction is completed, cool the reaction solution to room temperature;

[0062] (3) Removing CASO4: Centrifuging the reaction solution to remove the generated CASO4;

[0063] (4) Neutralizing the acidic solution: Adjust the pH to 8.8 with a base containing potassium ions and stir to promote the reaction;

[0064] (5) Nanofiltration membrane filtration: The reaction solution is filtered through a nanofiltration membrane, and the filtrate is collected to obtain small molecule selenized carrageenan;

[0065] (6) Purification: The filtrate in step (5) is concentrated or dried to obtain a solid product.

[0066] As a preferred embodiment, organic chelated zinc, organic chelated chromium Cr 3+ The production process of organic chelated germanium is as follows:

[0067] (1) Material preparation: inorganic zinc, inorganic chromium, inorganic germanium, organic ligand: ethylenediaminetetraacetic acid;

[0068] (2) Dissolving: Dissolve the inorganic zinc in water and stir until completely dissolved;

[0069] (3) Adding organic ligand: slowly adding organic ligand while continuously stirring the mixed solution;

[0070] (4) Adjusting the pH value: Using an acid or a base to adjust the pH value of the solution as needed to promote the chelation reaction;

[0071] (5) Reaction time: Keep stirring and allow the reaction to proceed for 2 h;

[0072] (6) Separation and purification: After the reaction is completed, the chelate is separated to obtain organic chelated zinc. Similarly, organic chelated chromium Cr is prepared. 3+ and organic chelated germanium;

[0073] Preferably, the method of separating the chelate includes but is not limited to filtration, evaporation, and crystallization.

[0074] The present invention also provides a method for preparing a multifunctional trace element compound fertilizer, the steps of which are as follows:

[0075] Step 1: Prepare the required weight of organic chelated zinc and organic chelated chromium according to the formula ratio. 3+ , organic chelated germanium, selenium polysaccharide and water;

[0076] Step 2: Organic chelated zinc, organic chelated chromium Cr 3+ , organic chelated germanium and selenium polysaccharides are dissolved in water and prepared into liquid fertilizer.

[0077] Preferably, the method of use is: spray 3 times 8 months before harvest, 1 liter per mu of land each time, dilute 50 times and spray on the leaves, with an interval of more than 2 months between two sprayings.

[0078] Example 3

[0079] The present invention provides an embodiment: a multifunctional trace element compound fertilizer, which comprises the following components by mass percentage: organic chelated zinc: 1.68%, organic chelated chromium Cr 3+ : 0.1%, organic chelated germanium: 0.015%, selenium polysaccharide 12.12%, water: 86.085%.

[0080] Preferably, purified water is used.

[0081] Preferably, the production process of selenium polysaccharide is as follows:

[0082] (1) Carrageenan degradation: Carrageenan was prepared into a 1% sol at 80°C, and hydrochloric acid solution was added under stirring and fully reacted at a reaction temperature of 80°C and a reaction time of 4 hours to obtain a small molecule carrageenan with a molecular weight of 300 to 1000 Daltons;

[0083] (2) Selenization reaction: add selenious acid or its salt and calcium salt to the above-mentioned small molecule carrageenan solution, heat to 55°C, and react at constant temperature for 11 hours to generate selenized polysaccharide compounds. After the reaction is completed, cool the reaction solution to room temperature;

[0084] (3) Removing CASO4: Centrifuging the reaction solution to remove the generated CASO4;

[0085] (4) Neutralizing the acidic solution: Adjust the pH to 6 with a base containing potassium ions and stir to promote the reaction;

[0086] (5) Nanofiltration membrane filtration: The reaction solution is filtered through a nanofiltration membrane, and the filtrate is collected to obtain small molecule selenized carrageenan;

[0087] (6) Purification: The filtrate in step (5) is concentrated or dried to obtain a solid product.

[0088] As a preferred embodiment, organic chelated zinc, organic chelated chromium Cr 3+ The production process of organic chelated germanium is as follows:

[0089] (1) Material preparation: inorganic zinc, inorganic chromium, inorganic germanium, organic ligand: ethylenediaminetetraacetic acid;

[0090] (2) Dissolving: Dissolve the inorganic zinc in water and stir until completely dissolved;

[0091] (3) Adding organic ligand: slowly adding organic ligand while continuously stirring the mixed solution;

[0092] (4) Adjusting the pH value: Using an acid or a base to adjust the pH value of the solution as needed to promote the chelation reaction;

[0093] (5) Reaction time: Keep stirring and allow the reaction to proceed for 1.5 h;

[0094] (6) Separation and purification: After the reaction is completed, the chelate is separated to obtain organic chelated zinc. Similarly, organic chelated chromium Cr is prepared. 3+ and organic chelated germanium;

[0095] Preferably, the method of separating the chelate includes but is not limited to filtration, evaporation, and crystallization.

[0096] The present invention also provides a method for preparing a multifunctional trace element compound fertilizer, the steps of which are as follows:

[0097] Step 1: Prepare the required weight of organic chelated zinc and organic chelated chromium according to the formula ratio. 3+ , organic chelated germanium, selenium polysaccharide and water;

[0098] Step 2: Organic chelated zinc, organic chelated chromium Cr 3+ , organic chelated germanium and selenium polysaccharides are dissolved in water and prepared into liquid fertilizer.

[0099] Preferably, the method of use is: spray 3 times 7 months before harvest, 1 liter per mu each time, dilute 40 times and spray on the leaves, with an interval of more than 2 months between two sprayings.

[0100] Through the above steps, trace elements required by the human body such as selenium, germanium, chromium, zinc and the medium elements required by plants are integrated into one. When applied to crops, the human body can be supplemented with trace elements in a balanced manner, while the purpose of increasing crop yields can be achieved, the pharmacological value and health benefits of Chinese herbal medicines can be improved, so as to meet the most lacking nutritional needs of the human body, and the crops can be effectively promoted to absorb and utilize nutrients in the soil, and the crop yield and quality can be improved. These crops can enrich and transform trace elements such as selenium, germanium, chromium, zinc and the like during their growth, so that the agricultural products finally harvested are rich in these nutrients that are essential to human health. Consumers can easily ingest these scarce and necessary trace elements through their daily diet, thus meeting the urgent needs of modern people for healthy diet and balanced supplementation of trace elements, so as to solve the problem that foliar fertilizers are mostly single selenium fertilizers, germanium fertilizers, or zinc fertilizers, and the agricultural products produced are limited to one or two functional trace element components, which cannot meet people's needs for supplementing trace elements together.

[0101] The embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. Multifunctional trace element compound fertilizer, characterized in that: In terms of mass percentage, it includes the following components: organic chelated zinc: 1.68%, organic chelated chromium Cr 3+ : 0.1%, organic chelated germanium: 0.015%, selenium polysaccharide 12.12%, water: 86.085%.

2. The multifunctional trace element compound fertilizer according to claim 1, characterized in that: The water used is purified water.

3. The multifunctional trace element compound fertilizer according to claim 1, characterized in that: The production process of selenium polysaccharide is as follows: (1) Carrageenan degradation: Carrageenan is prepared into a sol at 80°C, and hydrochloric acid solution is added under stirring and fully reacted to obtain a small molecule carrageenan with a molecular weight of 300 to 1000 Daltons; (2) Selenization reaction: add selenious acid or its salt and calcium salt to the above-mentioned small molecule carrageenan solution, heat to 30-80° C., and react at constant temperature for 8-14 hours to generate selenized polysaccharide compounds. After the reaction is completed, cool the reaction solution to room temperature; (3) Removing CASO4: Centrifuging the reaction solution to remove the generated CASO4; (4) Neutralizing the acidic solution: Use a base containing potassium ions to adjust the pH to 3-9 and stir to promote the reaction; (5) Nanofiltration membrane filtration: The reaction solution is filtered through a nanofiltration membrane, and the filtrate is collected to obtain small molecule selenized carrageenan; (6) Purification: The filtrate in step (5) is concentrated or dried to obtain a solid product.

4. The multifunctional trace element compound fertilizer according to claim 3, characterized in that: In step (1), the concentration of the sol is 0.1-2%, the reaction temperature is 30-100° C., and the reaction time is 3-5 hours.

5. The multifunctional trace element compound fertilizer according to claim 1, characterized in that: Organic chelated zinc, organic chelated chromium Cr 3+ The production process of organic chelated germanium is as follows: (1) Material preparation: inorganic zinc, inorganic chromium, inorganic germanium, organic ligand: ethylenediaminetetraacetic acid; (2) Dissolving: Dissolve the inorganic zinc in water and stir until completely dissolved; (3) Adding organic ligand: slowly adding organic ligand while continuously stirring the mixed solution; (4) Adjusting the pH value: Using an acid or a base to adjust the pH value of the solution as needed to promote the chelation reaction; (5) Reaction time: Keep stirring and allow the reaction to proceed for 1 to 2 hours; (6) Separation and purification: After the reaction is completed, the chelate is separated to obtain organic chelated zinc. Similarly, organic chelated chromium Cr is prepared. 3+ and organic chelated germanium.

6. The multifunctional trace element compound fertilizer according to claim 5, characterized in that: Methods for isolating the chelate include, but are not limited to, filtration, evaporation, and crystallization.

7. The multifunctional trace element compound fertilizer according to claim 1, characterized in that: The preparation steps are as follows: Step 1: Prepare the required weight of organic chelated zinc and organic chelated chromium according to the formula ratio. 3+ , organic chelated germanium, selenium polysaccharide and water; Step 2: Organic chelated zinc, organic chelated chromium Cr 3+ , organic chelated germanium and selenium polysaccharides are dissolved in water and prepared into liquid fertilizer.

8. The multifunctional trace element compound fertilizer according to claim 7, characterized in that: The method of use is: spray 3 times 6 to 8 months before harvest, 1 liter per acre each time, dilute 30 to 50 times and spray on the leaves, with an interval of more than 2 months between two sprayings.