CN113200777A - Green efficient chelating medium-trace element water-soluble fertilizer and preparation method thereof - Google Patents
Green efficient chelating medium-trace element water-soluble fertilizer and preparation method thereof Download PDFInfo
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- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
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Abstract
The invention belongs to the technical field of water-soluble fertilizer preparation, and particularly relates to a green efficient chelating medium-trace element water-soluble fertilizer and a preparation method thereof. The water-soluble organic acid salt comprises, by weight, 2.0-30.0% of industrial compound amino acid, 0.5-20.0% of iminodisuccinic acid, 0.15-6.5% of ammonium bicarbonate, 1.0-5.0% of soluble calcium salt, 0.5-3.0% of soluble magnesium salt, 0.1-2.0% of soluble zinc salt, 0.1-2.0% of soluble ferric salt, 0.05-2.0% of soluble copper salt, 0.05-3.0% of soluble manganese salt, 0.5-3.0% of potassium tetraborate tetrahydrate, 0.01-5.0% of a pH regulator and the balance of deionized water. The multi-element chelated water soluble fertilizer has the advantages of high raw material utilization rate, chelating rate and absorption rate, high fertilizer efficiency, good stability and balanced nutrition.
Description
Technical Field
The invention belongs to the technical field of water-soluble fertilizer preparation, and particularly relates to a green efficient chelating medium-trace element water-soluble fertilizer and a preparation method thereof.
Background
In the long-term growth stage of the plant, different nutrient elements must be absorbed, and sufficient energy is provided for the normal growth and development of the plant through continuous photosynthesis to synthesize various enzymes required by the body function of the plant. The essential nutrient elements of the plant can be divided into major elements, medium elements and trace elements according to the absorption amount of the nutrient elements by the plant. Wherein the major elements are C, H, O, N, P, K, the secondary elements are Ca, Mg and S, and the trace elements are Fe, B, Mn, Cu, Zn, Mo, Cl and Ni. Among these essential elements, C, H, O is obtained from the air by the respiration of the plant itself, and other elements are absorbed from the soil solution through the root system, or some ions or small molecules of liquid are absorbed through the stomata of the plant leaf epidermis.
The medium trace elements such as Ca, Mg, Cu, Zn, Mn, Fe, B and the like can participate in the life process of plants, are important nutrient elements required by organisms and play an important role in the life activities of the organisms. Although these trace elements may be required in a very small amount in a certain process, the deficiency of any one of these metal elements affects the growth and development of crops, resulting in a decrease in yield, quality, etc., and even withering and death. Taking calcium as an example, the calcium is a main component of plant cell walls and intercellular layers, and can enable organs and individuals of plants to have certain mechanical strength; in addition, calcium is a component and an activator of some enzymes in the plant body, has certain influence on the metabolism of nitrogen and carbohydrate, has a promotion effect on the absorption of potassium ions by the plant, and can generate the symptoms of short plant, low plant setting rate and the like in case of calcium deficiency of the plant.
At the same time, the human body also needs some medium and trace elements. The normal people take various medium and trace elements beneficial to the body every day, such as: calcium, magnesium, iron, zinc, copper, manganese, iodine, cobalt, strontium, chromium, selenium and other medium and trace elements. The above elements cannot be produced and synthesized in vivo, and need to be provided by food. The medium trace elements have relatively low content in human body, but have powerful biological effect, and they are involved in the metabolism of enzyme, hormone, vitamin and nucleic acid, and may be used as enzyme component or activator to raise immunity. Improves the medium and trace elements in the plant body, and is beneficial to supplementing the medium and trace elements required by the human body through diet.
The improvement of crop yield and quality by fertilization is a scientific approach. Most of the medium and trace element fertilizers applied in early stage of China are inorganic salts such as copper sulfate, ferrous sulfate and the like, but metal elements in the inorganic salts are easily fixed in soil and become insoluble substances to lose the effect, so that the fertilizer can be absorbed by plants very little and the fertilizer efficiency is seriously influenced; and due to the antagonism among elements, the fertilizer is easy to be adsorbed and fixed by soil colloid and has poor absorption effect. Therefore, even if the fertilizer is applied in a balanced manner, the fertilizer is not equal to the balanced absorption of crops.
In order to solve the contradiction, the chelating agent is usually chelated with metal ions to form a chelate with strong pH value adaptability to provide necessary nutrient elements for plants. The chelate fertilizer is a novel chelate fertilizer, is not easy to be fixed in soil, is easy to dissolve in water, is beneficial to the absorption of crops, can avoid or reduce nutrient loss and improves the utilization rate of the fertilizer. The fertilizer efficiency of the chelated micro-fertilizer is reported to be 2-5 times of that of the inorganic micro-fertilizer.
In addition, iminodisuccinic acid (IDS) is a novel green and environment-friendly alkaline complexing agent, has strong chelating power on calcium, magnesium, zinc and other transition metal ions, and particularly has higher chelating power on heavy metal elements such as copper, iron, manganese, nickel and the like than common chelating agents such as EDTA and the like. However, IDS contains excessive sodium ions which have a poisoning effect, and when plants absorb more sodium ions, the structure and the function of cell membranes can be changed, and the plants are prevented from absorbing other medium and trace elements. Secondly, the external osmotic pressure can be changed under the condition of excessive sodium ions, so that the water absorption of plants is difficult, and the water shortage of the plants is caused.
The coordination abilities between different chelating agents or ligands and metal ions are different, so that the stability between chelates is also different. For the absorption of crops, the stability of the chelate is not ideal if being too high or too low, the stability is not favorable for the absorption, decomposition and utilization of crops, and the stability is too low to reach the absorption parts of plants safely. In the past, ethylenediamine tetraacetic acid (EDTA) and citric acid and the like are used as chelating agents, so that the stability of medium and trace elements can be effectively improved, carbonate and phosphate which are insoluble in water are prevented from being generated, the utilization rate of the fertilizer is improved, the fertilizing effect is improved, but EDTA is not easily degraded in soil and harms plant growth. Therefore, a green high-efficiency chelating medium-trace element water-soluble fertilizer and a preparation method thereof are provided.
Disclosure of Invention
The invention aims to provide a multi-element chelated water soluble fertilizer with high raw material utilization rate, chelating rate and absorption rate, fertilizer efficiency, good stability and balanced nutrition and a preparation method thereof, and solves the problems of low raw material utilization rate and chelating rate, nondegradable property and complex process of the existing chelated fertilizer.
In order to achieve the purpose, the invention provides the following technical scheme:
the green high-efficiency multi-element chelated water-soluble fertilizer comprises, by weight, 2.0-30.0% of industrial compound amino acid, 0.5-20.0% of iminodisuccinic acid, 0.15-6.5% of ammonium bicarbonate, 1.0-5.0% of soluble calcium salt, 0.5-3.0% of soluble magnesium salt, 0.1-2.0% of soluble zinc salt, 0.1-2.0% of soluble ferric salt, 0.05-2.0% of soluble copper salt, 0.05-3.0% of soluble manganese salt, 0.5-3.0% of potassium tetraborate tetrahydrate, 0.01-5.0% of a pH regulator and the balance of deionized water.
Further, the industrial compound amino acid comprises glycine, glutamic acid, alanine, aspartic acid, threonine, serine, cystine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, lysine, histidine, arginine, proline and free amino acid, the total amount of the amino acid is 80-95% of the weight of the industrial compound amino acid, and the rest is polypeptide which is not completely hydrolyzed, and some inorganic salt and solid impurities in the treatment process.
Preferably, the soluble calcium salt is at least one of calcium nitrate and calcium dihydrogen phosphate.
Preferably, the soluble magnesium salt is at least one of magnesium nitrate and magnesium sulfate.
Preferably, the soluble zinc salt is at least one of zinc nitrate, zinc sulfate and basic zinc carbonate.
Preferably, the soluble iron salt is at least one of ferrous nitrate, ferrous sulfate and ferrous oxide.
Preferably, the soluble copper salt is at least one of copper nitrate and copper sulfate.
Preferably, the soluble manganese salt is manganese sulfate.
Preferably, the molar ratio of the soluble metal salt to the chelating agent is 1: 0.9-1: 2.1.
Preferably, the pH regulator is at least one of nitric acid and potassium hydroxide.
Further, the preparation method of the green high-efficiency multi-element chelated water-soluble fertilizer comprises the following steps:
(1) dissolving industrial compound amino acid, soluble calcium salt, soluble magnesium salt, soluble zinc salt, soluble ferric salt, soluble copper salt and soluble manganese salt in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6-8;
(3) heating the mixed solution to 40-70 ℃;
(4) mechanically stirring the mixed solution for 0.5-2 hours, and carrying out chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, then adjusting the pH value to be the same as the pH value in the feed liquid in the step (2) to obtain iminodisuccinic acid ammonium, adding the solution into the mixed solution in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a tetrahydrate potassium tetraborate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer with a certain concentration.
Preferably, the molar ratio of the iminodisuccinic acid to the ammonium bicarbonate is 1: 1-1: 2.
Further, in the step (5), the imino disuccinic acid is added into the ammonium bicarbonate solution for multiple times, the addition amount of each time is 5-10%, and the addition interval of each time is 1-2 min.
Amino acids: the amino acid can be directly absorbed by crops, directly participates in protein synthesis of organisms under the condition of no need of photosynthesis, and is a good biological fertilizer; certain kinds of amino acids also have the function of growth regulators, and can promote photosynthesis and respiration of crops; meanwhile, the bactericide has a bactericidal effect and can prevent and treat the nutrient deficiency of crops; therefore, the amino acid is used as the chelating agent to prepare the chelate fertilizer, and the yield increasing effect on crops is more obvious.
In summary, due to the adoption of the technical scheme, the beneficial technical effects of the invention are as follows:
1. a green high-efficiency multi-element chelated water-soluble fertilizer can provide various medium and trace elements for plants, and can provide various amino acids and nitrogen, sulfur, phosphorus and potassium elements required by the plants, thereby ensuring the balanced nutrition and normal growth of the plants, and improving the content of the medium and trace elements in the plants.
2. The imino disuccinic acid ammonium is prepared by mixing ammonium bicarbonate and imino disuccinic acid, so that the side effect of more sodium ions in the traditional IDS chelating agent on the absorption of nutrient components and water by plants is changed. Ammonium ions are used for replacing sodium ions, so that on one hand, the characteristics of no toxicity, no pollution, easy biodegradation and the like of the IDS chelating agent are continued, and the IDS chelating agent has the characteristics of environmental protection, high efficiency, easy water dissolution, easy absorption, no antagonistic action and environmental friendliness; on the other hand, the plant can be effectively promoted to better absorb other medium and trace elements, the adverse effect caused by excessive sodium ions is avoided, and nitrogen elements necessary for the growth of the plant are provided for the plant, so that the growth of the plant is better promoted. In addition, the amino acid chelate fertilizer and amino acid are cooperatively used, so that the chelating performance of the amino acid chelate fertilizer can be improved, free medium and trace elements can be sufficiently chelated, the contents of the amino acid and the medium and trace elements in plants can be improved, and the fertilizer is green and degradable, and has a good application prospect as an efficient and environment-friendly chelate fertilizer.
3. The green high-efficiency multi-element chelated water-soluble fertilizer is simple in preparation process, the used soluble metal salts are soluble nitrate, phosphate and sulfate, anions can provide N, P, S elements required by plants, the processes of post-treatment, separation and purification and the like are omitted, the utilization rate of raw materials is improved, and the equipment and operation cost is reduced; in addition, the potassium tetraborate tetrahydrate and the chelate fertilizer are compounded, so that necessary boron can be provided for plants, and meanwhile, the potassium element can also be absorbed and utilized by the plants, so that the utilization rate of raw materials is improved, and the process is simple and effective.
4. The green high-efficiency multi-element chelated water-soluble fertilizer has high purity, small using amount, good plant leaf surface absorbability, slow release property and lasting fertilizer effect, can meet the demand of medium and trace elements in the growth process of crops, and achieves the aims of supplementing the trace elements in the plants, balancing the nutrients of the crops and improving the yield of the crops.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
In the embodiment, the green high-efficiency multi-element chelated water-soluble fertilizer is prepared from the following components in percentage by weight:
| industrial compound amino acid | 30.0％ |
| Iminodisuccinic acid | 2.0％ |
| Ammonium bicarbonate | 2.4％ |
| Calcium nitrate | 5.0％ |
| Magnesium nitrate | 3.0％ |
| Zinc nitrate | 2.0％ |
| Ferrous nitrate | 2.0％ |
| Copper nitrate | 2.0％ |
| Manganese sulfate | 3.0％ |
| Tetrahydrate potassium tetraborate | 3.0％ |
| PH regulator | 0.01～5.0％ |
| Deionized water | Balance of |
The preparation method comprises the following steps:
(1) dissolving industrial compound amino acid, calcium nitrate, magnesium nitrate, zinc nitrate, ferrous nitrate, copper nitrate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6;
(3) heating the mixed solution to 60 ℃;
(4) mechanically stirring the mixed solution for 2 hours to carry out chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, adjusting the pH value of the feed liquid to 6 to obtain a mixed solution, adding the mixed solution into the mixed solution obtained in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a tetrahydrate potassium tetraborate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer with a certain concentration.
Example 2
The green high-efficiency multi-element chelated water-soluble fertilizer is prepared from the following components in percentage by weight:
| industrial compound amino acid | 17.0％ |
| Iminodisuccinic acid | 0.5％ |
| Ammonium bicarbonate | 0.2％ |
| Calcium dihydrogen phosphate | 3.0％ |
| Magnesium nitrate | 1.5％ |
| Zinc nitrate | 2.0％ |
| Ferrous nitrate | 1.0％ |
| Copper nitrate | 1.0％ |
| Manganese sulfate | 1.5％ |
| Tetrahydrate potassium tetraborate | 2.0％ |
| pH regulator | 0.01～5.0％ |
| Deionized water | Balance of |
The preparation method comprises the following steps:
(1) dissolving industrial compound amino acid, monocalcium phosphate, magnesium nitrate, zinc nitrate, ferrous nitrate, copper nitrate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 7;
(3) heating the mixed solution to 50 ℃;
(4) mechanically stirring the mixed solution for 2 hours to carry out chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, adjusting the pH value of the feed liquid to 7 to obtain a mixed solution, adding the mixed solution into the mixed solution obtained in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a tetrahydrate potassium tetraborate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer with a certain concentration.
Example 3
The green high-efficiency multi-element chelated water-soluble fertilizer is prepared from the following components in percentage by weight:
| industrial compound amino acid | 19.0％ |
| Iminodisuccinic acid | 0.5％ |
| Ammonium bicarbonate | 0.2％ |
| Calcium nitrate | 1.0％ |
| Magnesium sulfate | 3.0％ |
| Zinc nitrate | 1.5％ |
| Ferrous nitrate | 1.2％ |
| Copper nitrate | 1.0％ |
| Manganese sulfate | 1.5％ |
| Tetrahydrate potassium tetraborate | 2.0％ |
| pH regulator | 0.01～5.0％ |
| Deionized water | Balance of |
The preparation method comprises the following steps:
(1) dissolving industrial compound amino acid, calcium nitrate, magnesium sulfate, zinc nitrate, ferrous nitrate, cupric nitrate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6;
(3) heating the mixed solution to 70 ℃;
(4) mechanically stirring the mixed solution for 1.5h, and carrying out chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, adjusting the pH value of the feed liquid to 6 to obtain a mixed solution, adding the mixed solution into the mixed solution obtained in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a tetrahydrate potassium tetraborate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer with a certain concentration.
Example 4
The green high-efficiency multi-element chelated water-soluble fertilizer is prepared from the following components in percentage by weight:
| industrial compound amino acid | 12.5％ |
| Iminodisuccinic acid | 0.5％ |
| Ammonium bicarbonate | 0.2％ |
| Calcium nitrate | 4.0％ |
| Magnesium nitrate | 0.5％ |
| Basic zinc carbonate | 1.2％ |
| Ferrous nitrate | 1.0％ |
| Copper nitrate | 0.05％ |
| Manganese sulfate | 0.5％ |
| Tetrahydrate potassium tetraborate | 1.0％ |
| pH adjustmentAgent for treating cancer | 0.01～5.0％ |
| Deionized water | Balance of |
The preparation method comprises the following steps:
(1) dissolving industrial compound amino acid, calcium nitrate, magnesium nitrate, basic zinc carbonate, ferrous nitrate, cupric nitrate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 8;
(3) heating the mixed solution to 60 ℃;
(4) mechanically stirring the mixed solution for 1h to perform a chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, adjusting the pH value of the feed liquid to 8 to obtain a mixed solution, adding the mixed solution into the mixed solution obtained in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a quantitative potassium tetraborate tetrahydrate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer.
Example 5
The green high-efficiency multi-element chelated water-soluble fertilizer is prepared from the following components in percentage by weight:
the preparation method comprises the following steps:
(1) dissolving industrial compound amino acid, calcium nitrate, magnesium nitrate, zinc sulfate, ferrous nitrate, copper nitrate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6.5;
(3) heating the mixed solution to 70 ℃;
(4) mechanically stirring the mixed solution for 0.5h, and carrying out chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, adjusting the pH of the feed liquid to 6.5 to obtain a mixed solution, adding the mixed solution into the mixed solution obtained in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a quantitative potassium tetraborate tetrahydrate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer.
Example 6
The green high-efficiency multi-element chelated water-soluble fertilizer is prepared from the following components in percentage by weight:
the preparation method comprises the following steps:
(1) dissolving industrial compound amino acid, calcium nitrate, magnesium sulfate, zinc nitrate, ferrous oxide, copper sulfate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6.8;
(3) heating the mixed solution to 60 ℃;
(4) mechanically stirring the mixed solution for 2 hours to carry out chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, adjusting the pH of the feed liquid to 6.8 to obtain a mixed solution, adding the mixed solution into the mixed solution obtained in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a quantitative potassium tetraborate tetrahydrate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer.
Comparative example 1
The comparative example provides a multi-element amino acid chelate fertilizer which comprises, by weight, 30.0% of industrial compound amino acid, 5.0% of calcium nitrate, 3.0% of magnesium nitrate, 2.0% of zinc nitrate, 2.0% of ferrous nitrate, 2.0% of copper nitrate, 2.0% of manganese sulfate (2.0%), 3.0% of potassium tetraborate tetrahydrate, 0.01-5.0% of a pH regulator and deionized water.
The preparation method of the multi-element chelate fertilizer comprises the following steps.
(1) Dissolving industrial compound amino acid, calcium nitrate, magnesium nitrate, zinc nitrate, ferrous nitrate, copper nitrate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6;
(3) heating the mixed solution to 60 ℃;
(4) mechanically stirring the mixed solution for 2 hours to carry out chelation reaction;
(5) and (4) cooling the feed liquid obtained in the step (4) to room temperature, filtering, adding a tetrahydrate potassium tetraborate aqueous solution, and fixing the volume by using deionized water to obtain the multi-element amino acid chelated water soluble fertilizer with a certain concentration.
Comparative example 2
The comparative example provides a multi-element amino acid chelate fertilizer which comprises, by weight, 26.0% of industrial compound amino acid, 3.5% of calcium nitrate, 3.0% of magnesium sulfate, 2.0% of zinc nitrate, 1.5% of ferrous oxide, 1.6% of copper sulfate, 1.8% of manganese sulfate, 3.0% of potassium tetraborate tetrahydrate, 0.01-5.0% of a pH regulator and deionized water.
The preparation method of the multi-element chelate fertilizer comprises the following steps.
(1) Dissolving industrial compound amino acid, calcium nitrate, magnesium sulfate, zinc nitrate, ferrous oxide, copper sulfate and manganese sulfate in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6.8;
(3) heating the mixed solution to 60 ℃;
(4) mechanically stirring the mixed solution for 2 hours to carry out chelation reaction;
(5) and (4) cooling the feed liquid obtained in the step (4) to room temperature, filtering, adding a tetrahydrate potassium tetraborate aqueous solution, and fixing the volume by using deionized water to obtain the multi-element amino acid chelated water soluble fertilizer with a certain concentration.
The chelating rates of metals in the multi-element chelating fertilizer prepared in the above examples and comparative examples are measured, and the corresponding measurement results are shown in the following table:
TABLE 1 chelating ratio of metals in multi-element chelating fertilizer
| Metal chelating rate | |
| Example 1 | 99.5％ |
| Example 2 | 99.8％ |
| Example 3 | 99.9％ |
| Example 4 | 100％ |
| Example 5 | 99.8％ |
| Example 6 | 99.7％ |
| Comparative example 1 | 79.8％ |
| Comparative example 2 | 82.8％ |
From table 1, it can be seen that the use of the raw materials with the specific mixture ratio of the invention, particularly the use of the industrial compound amino acid and the iminodisuccinic acid ammonium salt, can significantly improve the metal chelating rate of the multi-element chelating fertilizer, and the maximum rate can reach 100%.
The green high-efficiency multi-element chelated water-soluble fertilizer is used for an experiment for planting strawberries, a mu planting base is selected, the green high-efficiency multi-element chelated water-soluble fertilizer is sprayed in a mixed mode to serve as an experiment group, a control group of the mu base is sprayed with a conventional fertilizer according to the conventional planting requirements, and other conditions are the same.
The strawberry planted in the experimental group has stronger straw and branches and leaves, and the growth vigor is obviously superior to that of the strawberry planted in the control group; and respectively testing the trace element content of the strawberries of the experimental group and the control group, and experiments prove that the trace element content of the strawberries of the experimental group is obviously higher than that of the strawberries of the control group. Meanwhile, the application of the green high-efficiency multi-element chelated water-soluble fertilizer greatly reduces the fertilizer usage amount, saves labor, is environment-friendly, and increases the economic efficiency by more than 30 percent.
In conclusion, the green high-efficiency multi-element chelated water-soluble fertilizer prepared by the method can provide various medium and trace elements including Ca, Mg, Zn, Fe, Cu, Mn and B for plants, and can also provide various amino acids and N, S, P, K elements required by the plants, so that the nutrition balance and normal growth of the plants are ensured, the content of the medium and trace elements in the plants is increased, and crops rich in the medium and trace elements are further provided for life of people. The green high-efficiency multi-element chelated water-soluble fertilizer simultaneously takes the compound amino acid and the imino disuccinic acid ammonium as the co-chelating agent, so that free metal elements in a chelating system can be effectively chelated, and the metal chelating rate is improved. The use of the imino disuccinic acid ammonium improves the side effect of excessive sodium ions in the IDS chelating agent, and has the characteristics of no toxicity, no pollution and easy biodegradation. The medium and trace chelated fertilizer provided by the invention is environment-friendly and efficient, is easily soluble in water, is easy to absorb, has no antagonistic action, and does not cause harm to soil and environment. The production process comprises the following steps: the green high-efficiency multi-element chelated water-soluble fertilizer is simple in preparation process, the used soluble metal salts are soluble nitrate, phosphate and sulfate, anions can provide N, P, S elements for plants, the processes of post-treatment, separation and purification and the like are omitted, the utilization rate of raw materials is improved, and the equipment and operation cost is reduced; in addition, the potassium tetraborate tetrahydrate and the chelate fertilizer are compounded, so that necessary boron and potassium elements can be provided for plants, the utilization rate of raw materials is improved, and the process is simple and effective. The practical utilization aspect is as follows: the green high-efficiency multi-element chelated water-soluble fertilizer has the advantages of high purity, small using amount, good plant leaf surface absorbability, slow release and fertilizer efficiency durability, and can meet the demand of medium and trace elements in the crop growth process, thereby achieving the purposes of supplementing medium and trace elements, balancing crop nutrients and improving crop yield.
The above description is not intended to limit the present invention, but rather, the present invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
Claims (6)
1. The green high-efficiency multi-element chelated water-soluble fertilizer is characterized by comprising, by weight, 2.0-30.0% of industrial compound amino acid, 0.5-20.0% of iminodisuccinic acid, 0.15-6.5% of ammonium bicarbonate, 1.0-5.0% of soluble calcium salt, 0.5-3.0% of soluble magnesium salt, 0.1-2.0% of soluble zinc salt, 0.1-2.0% of soluble ferric salt, 0.05-2.0% of soluble copper salt, 0.05-3.0% of soluble manganese salt, 0.5-3.0% of potassium tetraborate tetrahydrate, 0.01-5.0% of a pH regulator and the balance of deionized water.
2. The green high-efficiency multi-element chelated water-soluble fertilizer as claimed in claim 1, wherein: the industrial compound amino acid comprises glycine, glutamic acid, alanine, aspartic acid, threonine, serine, cystine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, lysine, histidine, arginine, proline and free amino acid, and the total amount of the amino acids is 80-95% of the weight of the industrial compound amino acid.
3. The green high-efficiency multi-element chelated water-soluble fertilizer as claimed in claim 1, wherein: the pH regulator is characterized in that the soluble calcium salt is at least one of calcium nitrate and monocalcium phosphate, the soluble magnesium salt is at least one of magnesium nitrate and magnesium sulfate, the soluble zinc salt is at least one of zinc nitrate, zinc sulfate and basic zinc carbonate, the soluble ferric salt is at least one of ferrous nitrate, ferrous sulfate and ferrous oxide, the soluble copper salt is at least one of copper nitrate and copper sulfate, the soluble manganese salt is manganese sulfate, the molar ratio of the soluble metal salt to the chelating agent is 1: 0.9-1: 2.1, and the pH regulator is at least one of nitric acid and potassium hydroxide.
4. The green high-efficiency multi-element chelated water-soluble fertilizer as defined in claim 1, wherein the preparation method comprises the following steps:
(1) dissolving industrial compound amino acid, soluble calcium salt, soluble magnesium salt, soluble zinc salt, soluble ferric salt, soluble copper salt and soluble manganese salt in deionized water, and mechanically stirring for later use;
(2) adding a pH regulator into the feed liquid obtained in the step (1), and regulating the pH of the feed liquid to 6-8;
(3) heating the mixed solution to 40-70 ℃;
(4) mechanically stirring the mixed solution for 0.5-2 hours, and carrying out chelation reaction;
(5) mixing an ammonium bicarbonate solution with the mass fraction of 40% with iminodisuccinic acid, then adjusting the pH value to be the same as the pH value in the feed liquid in the step (2) to obtain iminodisuccinic acid ammonium, adding the solution into the mixed solution in the step (4) in batches, mechanically stirring for 0.5-1 h, and further carrying out a chelation reaction;
(6) and (3) cooling the feed liquid obtained in the step (5) to room temperature, filtering, adding a tetrahydrate potassium tetraborate aqueous solution, and fixing the volume by using deionized water to obtain the green high-efficiency multi-element chelated water soluble fertilizer with a certain concentration.
5. The preparation method of the green efficient chelating medium and trace element water-soluble fertilizer as claimed in claim 4, wherein the preparation method comprises the following steps: the molar ratio of the iminodisuccinic acid to the ammonium bicarbonate is 1: 1-1: 2.
6. The preparation method of the green efficient chelating medium and trace element water-soluble fertilizer as claimed in claim 4, wherein the preparation method comprises the following steps: in the step (5), the imino disuccinic acid is added into the ammonium bicarbonate solution for multiple times, the addition amount of each time is 5-10%, and the addition interval of each time is 1-2 min.
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| CN115304422A (en) * | 2022-08-19 | 2022-11-08 | 北京建佳农科技发展有限责任公司 | Liquid fertilizer and preparation method thereof |
| CN116675561A (en) * | 2023-06-02 | 2023-09-01 | 河北协同化学有限公司 | Composite chelated metal salt |
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| EP3044187A2 (en) * | 2013-09-12 | 2016-07-20 | Akzo Nobel Chemicals International B.V. | Acidic fertilizer compositions containing a metal complex of glutamic acid n,n-diacetic acid or iminodisuccinic acid |
| CN107324875A (en) * | 2017-06-26 | 2017-11-07 | 福州大学化肥催化剂国家工程研究中心 | A kind of trace element chelated fertilizer and preparation method thereof |
| CN110204382A (en) * | 2019-05-09 | 2019-09-06 | 深圳市芭田生态工程股份有限公司 | Degradable multicore chelating fertilizer and preparation method thereof |
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| EP3044187A2 (en) * | 2013-09-12 | 2016-07-20 | Akzo Nobel Chemicals International B.V. | Acidic fertilizer compositions containing a metal complex of glutamic acid n,n-diacetic acid or iminodisuccinic acid |
| CN107324875A (en) * | 2017-06-26 | 2017-11-07 | 福州大学化肥催化剂国家工程研究中心 | A kind of trace element chelated fertilizer and preparation method thereof |
| CN110204382A (en) * | 2019-05-09 | 2019-09-06 | 深圳市芭田生态工程股份有限公司 | Degradable multicore chelating fertilizer and preparation method thereof |
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| CN115304422A (en) * | 2022-08-19 | 2022-11-08 | 北京建佳农科技发展有限责任公司 | Liquid fertilizer and preparation method thereof |
| CN116675561A (en) * | 2023-06-02 | 2023-09-01 | 河北协同化学有限公司 | Composite chelated metal salt |
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