Ionic molybdenum liquid fertilizer and preparation method thereof

Abstract

The invention discloses an ionic molybdenum liquid fertilizer and a preparation method thereof, and belongs to the technical field of fertilizer preparation. The ionic molybdenum liquid fertilizer comprises the following raw materials in weight percentage: 20-30% of molybdenum salt, 25-35% of chelating agent, 1-5% of salicylic acid, 10-15% of sodium bisulfite, 10-15% of stabilizer, 10-15% of surfactant, and 3-5% of trace elements. The ionic molybdenum liquid fertilizer prepared by the invention has stable properties, can be directly absorbed by crops without conversion, can effectively promote the absorption of nitrogen and other main fertilizers by crops, and will not cause damage to the soil.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizer preparation, and in particular to an ionic molybdenum liquid fertilizer and a preparation method thereof. Background Art

[0002] Molybdenum is a trace element. When plants lack molybdenum, their growth will be hindered, the leaves will gradually turn yellow, and finally dry up and die. Molybdenum plays a great role in plants, but the demand is very small, generally accounting for about 0.5% of the dry weight of plants. Using a small amount of molybdenum fertilizer can make crops thrive. Molybdenum is involved in the reduction of nitrates and nitrogen metabolism in plants. It is an important component of nitrate reductase and plays an electron transfer role in the transformation of nitrogen forms. Its physiological function is closely related to nitrogen metabolism. When molybdenum is deficient, nitrogen metabolism is blocked, so the symptoms of molybdenum deficiency are quite similar to those of nitrogen deficiency. When molybdenum is deficient, the leaves of plants are pale and yellow. In severe cases, spots appear on the leaves. When molybdenum is severely deficient, the leaf edges wilt, and sometimes the leaves are twisted and cup-shaped. Old leaves become thick, scorched, and even die. Therefore, the role of molybdenum fertilizer on crops cannot be ignored. The molybdenum fertilizer used in agriculture is mainly solid ammonium molybdate, but ammonium molybdate is expensive, has unstable physical and chemical properties, and inorganic molybdenum salts have low crop absorption efficiency and are easily lost. Therefore, the use of molybdenum fertilizers has not been popularized in agricultural production for a long time, resulting in extremely low absorption rate of N elements. Most of the nitrogen fertilizers used in large quantities in agricultural production are lost through soil and water loss, which not only causes waste of nitrogen fertilizers but also pollutes water bodies and causes water enrichment and oxidation. How to prepare a molybdenum fertilizer with high utilization rate and then realize the promotion and application of molybdenum fertilizers has become a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0003] The object of the present invention is to provide an ionic molybdenum liquid fertilizer and a preparation method thereof, so as to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] One of the technical solutions of the present invention is an ionic molybdenum liquid fertilizer, which comprises the following raw materials in weight percentage: 20-30% of molybdenum salt, 25-35% of chelating agent, 1-5% of salicylic acid, 10-15% of sodium bisulfite, 10-15% of stabilizer, 10-15% of surfactant, and 3-5% of trace elements.

[0006] Furthermore, the molybdenum salt includes ammonium molybdate and / or sodium molybdate.

[0007] Furthermore, the chelating agent includes one or more of sugar alcohol, alcohol amine and L-glycine.

[0008] Furthermore, the alcoholamine includes monoethanolamine, diethanolamine or triethanolamine.

[0009] Furthermore, the sugar alcohol includes any one of xylitol, sorbitol and mannitol.

[0010] Sugar alcohols have excellent chelating, complexing and water-retaining abilities. They can effectively chelate a variety of metal ions. They have a small molecular weight and good permeability, which is beneficial to the plant's absorption of nutrients. Sugar alcohols are extracted from the sap of the plant phloem. After entering the leaves, they can carry nutrients smoothly into the phloem for nutrient transport.

[0011] L-glycine can slowly react with molybdenum salts to form stable chelates, thereby greatly improving the absorption rate of trace elements. The chelation is stable and crops can absorb it directly. It also directly participates in the body's protein synthesis when the plant does not photosynthesize. Compared with other chelating agents, amino acid chelates have a more obvious yield-increasing effect.

[0012] Salicylic acid can promote the transport of nutrients in plants.

[0013] Furthermore, the stabilizer includes one or more of citric acid, sodium gluconate, sodium carboxymethyl cellulose and sodium hexametaphosphate.

[0014] Furthermore, the surfactant is sodium dodecyl sulfate.

[0015] Furthermore, the trace elements include the following components in parts by weight: 1 to 3 parts of ferrous sulfate heptahydrate, 0.2 to 0.6 parts of copper sulfate pentahydrate, 1.5 to 2.5 parts of manganese sulfate monohydrate and 0.1 to 0.2 parts of zinc sulfate monohydrate.

[0016] The addition of trace elements can provide plants with the trace nutrients they need for growth, effectively stimulate plant growth, promote plant growth and development, increase crop yields and improve product quality, and enhance the ability of crops to resist pests and diseases, and resist diseases and lodging.

[0017] Technical solution 2 of the present invention: A method for preparing the above-mentioned ionic molybdenum liquid fertilizer comprises the following steps:

[0018] (1) weighing raw materials according to weight percentage, dissolving the chelating agent in water, then adding molybdenum salt, stirring for chelation reaction, and obtaining a chelated liquid;

[0019] (2) adding trace elements to the chelating liquid, and adding a stabilizer, a surfactant, salicylic acid and sodium bisulfite in sequence after dissolution; adjusting the pH to 5.0-6.5 after dissolution to obtain the ionic molybdenum liquid fertilizer.

[0020] Furthermore, the mass ratio of the chelating agent to water is 1:10-20.

[0021] Furthermore, the stirring speed is 50-100 r / min.

[0022] Furthermore, the chelating reaction is carried out at a temperature of 70 to 80° C. and for a time of 3 to 5 hours.

[0023] The present invention discloses the following technical effects:

[0024] (1) The ionic molybdenum liquid fertilizer prepared by the present invention has stable properties and can be directly absorbed by crops without conversion. It can effectively promote the absorption of main fertilizers such as nitrogen by crops and will not cause damage to the soil.

[0025] (2) The present invention uses organic compounds such as sugar alcohols as chelating agents to chelate molybdenum ions, thereby significantly improving the permeability of molybdenum ions and facilitating the absorption of nutrients by plants; and the chelated molybdenum ions can smoothly enter the phloem for nutrient transport, thereby increasing the effective molybdenum content in the plant body; sodium bisulfite can promote plants to produce more ATP, thereby promoting the contraction of P-protein in the phloem, and promoting the movement of the collector through the contraction of P-protein, further promoting the transport of molybdenum ions and improving the utilization rate of nutrients by plants.

[0026] (3) Applying the ionic molybdenum liquid fertilizer prepared by the present invention to plants can significantly increase the nitrogen content in plant leaves and improve the utilization rate of nitrogen.

[0027] (4) The ionic molybdenum liquid fertilizer prepared by the present invention is applied to crops, which can increase crop yield by 27.5-34.7%. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0029] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0030] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0031] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present application description and examples are exemplary only.

[0032] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0033] Example 1

[0034] A preparation method of ionic molybdenum liquid fertilizer:

[0035] The ionic molybdenum liquid fertilizer is composed of the following raw materials in percentage by weight: 30% of molybdenum salt (ammonium molybdate and sodium molybdate in a mass ratio of 1:1), 30% of xylitol, 2% of salicylic acid, 10% of sodium bisulfite, 13% of citric acid, 10% of sodium dodecyl sulfate, and 5% of trace elements.

[0036] The trace elements are composed of the following components in parts by weight: 2 parts of ferrous sulfate heptahydrate, 0.4 parts of copper sulfate pentahydrate, 2 parts of manganese sulfate monohydrate, and 0.1 parts of zinc sulfate monohydrate.

[0037] Preparation method:

[0038] (1) Weigh the raw materials according to the above weight percentages, dissolve xylitol in water (the mass ratio of xylitol to water is 1:10), then add molybdenum salt, continue stirring (50 r / min) for chelation reaction (temperature is 70° C., time is 4 h), and obtain a chelated liquid.

[0039] (2) adding trace elements to the chelating liquid, and adding citric acid, sodium lauryl sulfate, salicylic acid and sodium bisulfite in sequence after dissolution, and adjusting the pH to 6.0 after dissolution to obtain ionic molybdenum liquid fertilizer.

[0040] Example 2

[0041] A preparation method of ionic molybdenum liquid fertilizer:

[0042] The ionic molybdenum liquid fertilizer is composed of the following raw materials in percentage by weight: 20% of ammonium molybdate, 35% of sorbitol, 5% of salicylic acid, 12% of sodium bisulfite, 13% of sodium carboxymethyl cellulose, 10% of sodium dodecyl sulfate, and 5% of trace elements.

[0043] The trace elements are composed of the following components in parts by weight: 1 part of ferrous sulfate heptahydrate, 0.5 part of copper sulfate pentahydrate, 2.5 parts of manganese sulfate monohydrate, and 0.2 part of zinc sulfate monohydrate.

[0044] Preparation method:

[0045] (1) Weigh the raw materials according to the above weight percentages, dissolve sorbitol in water (the mass ratio of sorbitol to water is 1:15), then add ammonium molybdate, and continue stirring (100 r / min) for chelation reaction (temperature is 80° C., time is 3 h) to obtain a chelated liquid.

[0046] (2) adding trace elements to the chelating liquid, and then sequentially adding sodium carboxymethyl cellulose, sodium dodecyl sulfate, salicylic acid and sodium bisulfite, and adjusting the pH to 5.4 after dissolution to obtain ionic molybdenum liquid fertilizer.

[0047] Example 3

[0048] A preparation method of ionic molybdenum liquid fertilizer:

[0049] The ionic molybdenum liquid fertilizer is composed of the following raw materials in percentage by weight: 25% sodium molybdate, 25% mannitol, 2% salicylic acid, 15% sodium bisulfite, 15% sodium gluconate, 13% sodium dodecyl sulfate, and 5% trace elements.

[0050] The trace elements are composed of the following components in parts by weight: 3 parts of ferrous sulfate heptahydrate, 0.2 parts of copper sulfate pentahydrate, 1.5 parts of manganese sulfate monohydrate, and 0.1 parts of zinc sulfate monohydrate.

[0051] Preparation method:

[0052] (1) Weigh the raw materials according to the above weight percentages, dissolve mannitol in water (the mass ratio of mannitol to water is 1:20), then add sodium molybdate, and continue stirring (80 r / min) for chelation reaction (temperature is 75° C., time is 5 h) to obtain a chelated liquid.

[0053] (2) adding trace elements to the chelating liquid, and adding sodium gluconate, sodium dodecyl sulfate, salicylic acid and sodium bisulfite in sequence after dissolution, and adjusting the pH to 5.4 after dissolution to obtain ionic molybdenum liquid fertilizer.

[0054] Example 4

[0055] Same as Example 1, except that xylitol is replaced by xylitol, triethanolamine and L-glycine in a mass ratio of 1:1:1.

[0056] Comparative Example 1

[0057] Same as Example 1, except that sodium bisulfite is replaced by potassium sulfite.

[0058] Comparative Example 2

[0059] The same as Example 1, except that the ionic molybdenum liquid fertilizer is composed of the following raw materials in weight percentage: 30% of molybdenum salt (ammonium molybdate and sodium molybdate in a mass ratio of 1:1), 30% of xylitol, 2% of salicylic acid, 5% of sodium bisulfite, 15% of citric acid, 13% of sodium dodecyl sulfate, and 5% of trace elements.

[0060] Comparative Example 3

[0061] Same as Example 1, except that salicylic acid is replaced by gibberellin.

[0062] Comparative Example 4

[0063] The same as Example 1, except that the preparation method is specifically as follows: weigh the raw materials according to the above weight percentages, dissolve all the raw materials in water (the amount of water is 10 times that of xylitol), adjust the pH to 5.4, and obtain ionic molybdenum liquid fertilizer.

[0064] Effect Example 1

[0065] In Kunming City, Yunnan Province, 5 mu of soybean (Zhongpin 661) were planted and divided into 10 areas on average, with Area 1 corresponding to Example 1, Area 2 corresponding to Example 2, Area 3 corresponding to Example 3, Area 4 corresponding to Example 4, Area 5 corresponding to Example 1, Area 6 corresponding to Example 2, Area 7 corresponding to Example 3, Area 8 corresponding to Example 4, Area 9 corresponding to the control group, and Area 10 corresponding to the blank control group.

[0066] Areas 1 to 4 and areas 5 to 8 are sprayed with the ionic molybdenum liquid fertilizer prepared in Examples 1 to 4 of the present invention and Comparative Examples 1 to 4; spraying method: 25 g of ionic molybdenum liquid fertilizer is added to 25 L of water, mixed and dissolved, and then all sprayed in an area of ​​0.5 mu.

[0067] Molybdenum salt (ammonium molybdate and sodium molybdate in a mass ratio of 1:1) was sprayed in the 9th area. The spraying method was as follows: 7.5 g of molybdenum salt was added to 25 L of water, and after mixing and dissolving, all of it was sprayed in an area of ​​0.5 mu.

[0068] Spray zone 10 with clean water.

[0069] The above fertilizers are sprayed once at the soybean seedling stage, once before flowering, and once after flowering, and regular field management is carried out.

[0070] 7 days after the last fertilizer spraying, soybean leaves were taken and the total nitrogen content (dry weight) in the upper leaves of soybeans was determined by Kjeldahl method. The results are shown in Table 1.

[0071] Table 1

[0072]

[0073]

[0074] As can be seen from Table 1, spraying soybeans with the ionic molybdenum liquid fertilizer prepared by the present invention can significantly increase the nitrogen content in soybean leaves (i.e., it can improve the utilization rate of nitrogen), thereby increasing the nutrient content in soybean plants, promoting the growth of soybeans, and increasing soybean yield.

[0075] After soybean harvest, the yield was measured and the yield increase rate was calculated. The results are shown in Table 2.

[0076] Table 2

[0077] Grouping Yield (kg / mu) Yield increase rate (%) Example 1 312 32.2 Example 2 301 27.5 Example 3 306 29.7 Example 4 318 34.7 Comparative Example 1 287 21.6 Comparative Example 2 291 23.3 Comparative Example 3 295 25.0 Comparative Example 4 285 20.8 Control group 263 11.4 Blank control group 236 --

[0078] It can be seen from Table 2 that the soybean yield can be significantly increased by spraying the ionic molybdenum liquid fertilizer prepared by the present invention on soybeans, and the soybean yield increase rate reaches 27.5-34.7%.

[0079] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An ionic molybdenum liquid fertilizer, characterized in that: The invention is composed of the following raw materials in percentage by weight: 20-30% of molybdenum salt, 25-35% of chelating agent, 1-5% of salicylic acid, 10-15% of sodium bisulfite, 10-15% of stabilizer, 10-12% of surfactant and 3-5% of trace elements; The preparation method of the ionic molybdenum liquid fertilizer comprises the following steps: (1) weighing raw materials according to weight percentage, dissolving the chelating agent in water, then adding molybdenum salt, stirring for chelation reaction, and obtaining a chelated liquid; (2) adding trace elements to the chelating liquid, and adding a stabilizer, a surfactant, salicylic acid and sodium bisulfite in sequence after dissolution; adjusting the pH to 5.0-6.5 after dissolution to obtain the ionic molybdenum liquid fertilizer.

2. The ionic platinum liquid fertilizer according to claim 1, characterized in that The molybdenum salt includes ammonium molybdate and / or sodium molybdate.

3. The ionic platinum liquid fertilizer according to claim 1, characterized in that The chelating agent includes one or more of sugar alcohol, alcohol amine and L-glycine.

4. The ionic platinum liquid fertilizer according to claim 1, characterized in that The stabilizer includes one or more of citric acid, sodium gluconate, sodium carboxymethyl cellulose and sodium hexametaphosphate.

5. The ionic platinum liquid fertilizer according to claim 1, characterized in that The surfactant is sodium dodecyl sulfate.

6. The ionic molybdenum liquid fertilizer according to claim 1, characterized in that The trace elements include the following components in parts by weight: 1-3 parts of ferrous sulfate heptahydrate, 0.2-0.6 parts of copper sulfate pentahydrate, 1.5-2.5 parts of manganese sulfate monohydrate and 0.1-0.2 parts of zinc sulfate monohydrate.

7. The ionic platinum liquid fertilizer according to claim 1, characterized in that The mass ratio of the chelating agent to water is 1:10-20.

8. The ionic platinum liquid fertilizer according to claim 1, characterized in that The stirring speed is 50-100 r / min.

9. The ionic platinum liquid fertilizer according to claim 1, characterized in that The temperature of the chelating reaction is 70-80° C. and the time is 3-5 hours.

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