Spraying film-forming type spraying fertilizer and application method thereof

Abstract

The invention belongs to the technical field of fertilizers, and particularly relates to a spraying film-forming type spraying fertilizer and an application method thereof.The spraying fertilizer is prepared from, by mass, 5-10 parts of modified nano titanium dioxide, 100-150 parts of a nutritional agent, 4-8 parts of potassium carboxymethyl cellulose, 4-6 parts of a dispersing agent and 0.2-0.4 part of a cross-linking agent. According to the invention, titanium dioxide is added into the spraying fertilizer to form a latticed structure, so that the loss of nitrogen elements in the soil is avoided on the premise of ensuring smooth breathing of the soil or plants, and the environmental pollution caused by nitrogen-containing gas is also avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of fertilizers, and in particular relates to a spray film-forming spray fertilizer and an application method thereof. Background Art

[0002] In order to promote plant growth during farming, chemical nitrogen fertilizers are usually applied to the soil. However, the application of chemical nitrogen fertilizers will intensify the emission of gases such as nitric oxide and nitrite from the soil, which will not only cause environmental pollution and lead to an indirect greenhouse effect, but will also cause the loss of nitrogen fertilizer in the soil.

[0003] In addition, pesticides are sprayed on the leaves of plants during the farming process to have antibacterial and insecticidal effects, but the pesticides or organic matter remaining on the leaves will form pollutants and affect the growth of plants. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a spray film-forming spray fertilizer and an application method thereof. By adding titanium dioxide to the spray fertilizer and forming a grid structure, the loss of nitrogen in the soil is avoided while ensuring smooth breathing of the soil or plants, and the environmental pollution caused by nitrogen-containing gases is avoided.

[0005] The specific technical solution adopted by the present invention is:

[0006] A sprayable film-forming spray fertilizer comprises, by weight, 5-10 parts of modified nano titanium dioxide, 100-150 parts of nutrients, 4-8 parts of potassium carboxymethyl cellulose, 4-6 parts of dispersants, and 0.2-0.4 parts of cross-linking agents.

[0007] Furthermore, the modified nano titanium dioxide comprises 5-10 parts of nano titanium dioxide, 50-60 parts of acrylamide, and 1-3 parts of initiator, calculated by mass fraction.

[0008] Furthermore, the initiator includes any one of sodium bisulfite, potassium bisulfite or ammonium persulfate.

[0009] Furthermore, the preparation method of the modified nano titanium dioxide comprises the following steps:

[0010] A1. Prepare nano titanium dioxide, acrylamide and initiator;

[0011] A2, dissolving nano titanium dioxide in a container A filled with anhydrous ethanol, stirring evenly to form a nano titanium dioxide solution for standby use;

[0012] A3, adding acrylamide to the container B containing anhydrous ethanol, stirring evenly to obtain a monomer solution for standby use;

[0013] A4, adding the nano titanium dioxide solution in A2 to the monomer solution, then adding the initiator and stirring evenly, reacting for 1-2 hours and then drying to obtain the modified nano titanium dioxide.

[0014] Furthermore, the nutrient agent includes 40-50 parts of urea, 10-15 parts of ammonium chloride, and 8-10 parts of potassium chloride.

[0015] Further, the dispersant includes one or both of lauroyl diethanolamine and sodium hexametaphosphate;

[0016] Furthermore, the cross-linking agent includes one or two of N,N-methylenebisacrylamide and polyethylene glycol dimethacrylate.

[0017] A method for using a spray-film-forming spray fertilizer, the method for using the spray fertilizer in soil comprising the following steps:

[0018] S101, diluting the nutrient agent and water at a mass ratio of 1:10-20 to form a base solution for standby use;

[0019] S102, adding potassium carboxymethyl cellulose, modified nano titanium dioxide and a dispersant to the base liquid, then adding a cross-linking agent and stirring evenly, and obtaining a gel-like soil fertilizer after the reaction is completed;

[0020] S103, spreading the gel soil fertilizer evenly on the soil surface at the roots of the plants.

[0021] Furthermore, the method for spraying fertilizer on leaves comprises the following steps:

[0022] S201, diluting the nutrient agent and water at a mass ratio of 1:1000-1500 to form a base solution for standby use;

[0023] S202, adding potassium carboxymethyl cellulose, modified nano titanium dioxide and a dispersant to the base liquid, then adding a cross-linking agent and stirring evenly, and obtaining a liquid foliar fertilizer after the reaction is completed;

[0024] S203, spraying the foliar fertilizer evenly on the back of the leaves of the plants.

[0025] The beneficial effects of the present invention are:

[0026] In the production process of the spray fertilizer of the present invention, titanium dioxide is first coated by acrylamide monomer, and then acrylamide is evenly distributed in the base liquid. At this time, potassium carboxymethyl cellulose and a cross-linking agent are added, which will cause acrylamide and potassium carboxymethyl cellulose to react to form a grid-like skeleton, and the titanium dioxide coated with acrylamide will be evenly distributed at the nodes of the skeleton, thereby forming modified titanium dioxide.

[0027] When applied in the soil, the dilution ratio of the sprayed fertilizer is low and it is in a gel-like state. The gel-like soil fertilizer cannot completely penetrate into the soil and will remain on the soil surface. The volatile gas in the soil will pass through the mesh of the grid-like skeleton of the soil fertilizer. Since titanium dioxide has a nitrogen-fixing effect, the nitrogen-containing gas in the gas will be catalyzed by the modified titanium dioxide to form nitrates. The nitrates are bound by the soil fertilizer and flow back into the soil for plant absorption, thereby avoiding the loss of nitrogen in the soil while ensuring smooth soil breathing, and also avoiding environmental pollution caused by nitrogen-containing gases. In addition, pollutants in the environment will also be catalyzed by the modified titanium dioxide to form carbon dioxide and water for plant absorption, which improves the environment while promoting plant growth.

[0028] When applied on the leaves, the dilution ratio of the spray fertilizer is high and it is in liquid form. However, due to the grid-like skeleton structure in the foliar fertilizer, the foliar fertilizer still has a certain viscosity and can adhere to the leaf surface, so that the modified titanium dioxide is evenly distributed on the leaf surface. The modified titanium dioxide will decompose the pesticides or organic matter remaining on the leaf surface to form carbon dioxide and water for plants to absorb. At the same time, the modified titanium dioxide also has antibacterial, anti-pest and self-cleaning leaf effects, which is beneficial to plant growth. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0030] Specific embodiments Example 1

[0032] A1. Prepare 8 parts of nano titanium dioxide, 55 parts of acrylamide and 2 parts of sodium bisulfite;

[0033] A2, dissolving nano titanium dioxide in a container A filled with anhydrous ethanol, stirring evenly to form a nano titanium dioxide solution for standby use;

[0034] A3, adding acrylamide to the container B containing anhydrous ethanol, and then adding 2 parts of lauroyl diethanolamide as a dispersant, stirring evenly to obtain a monomer solution for standby use;

[0035] A4, adding the nano titanium dioxide solution in A2 to the monomer solution, adding sodium bisulfite dropwise while stirring, reacting for 1 hour, and then heating and drying to obtain the modified nano titanium dioxide.

[0036] Example 2

[0037] A1. Prepare 5 parts of nano titanium dioxide, 50 parts of acrylamide and 1 part of potassium bisulfite;

[0038] A2, dissolving nano titanium dioxide in a container A filled with anhydrous ethanol, stirring evenly to form a nano titanium dioxide solution for standby use;

[0039] A3, adding acrylamide to the container B containing anhydrous ethanol, and then adding 2 parts of lauroyl diethanolamide as a dispersant, stirring evenly to obtain a monomer solution for standby use;

[0040] A4, adding the nano titanium dioxide solution in A2 to the monomer solution, adding potassium bisulfite dropwise while stirring, reacting for 1 hour, and then heating and drying to obtain the modified nano titanium dioxide.

[0041] Example 3

[0042] A1. Prepare 8 parts of nano titanium dioxide, 60 parts of acrylamide and 3 parts of ammonium persulfate;

[0043] A2, dissolving nano titanium dioxide in a container A filled with anhydrous ethanol, stirring evenly to form a nano titanium dioxide solution for standby use;

[0044] A3, adding acrylamide to the container B containing anhydrous ethanol, and then adding 2 parts of lauroyl diethanolamide as a dispersant, stirring evenly to obtain a monomer solution for standby use;

[0045] A4, adding the nano titanium dioxide solution in A2 to the monomer solution, adding ammonium persulfate dropwise while stirring, reacting for 2 hours, and then heating and drying to obtain the modified nano titanium dioxide.

[0046] Performance Testing

[0047] A test field was taken and divided into 5 groups, each covering 1 mu, including the initial group, experimental group 1, experimental group 2, experimental group 3, and control group.

[0048] The same batch of healthy corns at the ear stage were transplanted into different groups in the experimental field, with 4,000 corns planted in each group;

[0049] Among them, the corn in the initial group was only supplemented with nutrients;

[0050] In Experimental Group 1, soil fertilizer and foliar fertilizer were prepared using modified nano titanium dioxide prepared in Example 1, and sprayed on the soil and corn leaves in Experimental Group 1;

[0051] In Experimental Group 2, the modified nano titanium dioxide prepared in Example 2 was used to make soil fertilizer and foliar fertilizer, and the modified nano titanium dioxide was sprayed on the soil and corn leaves in Experimental Group 2;

[0052] In Experimental Group 3, soil fertilizer and foliar fertilizer were prepared using modified nano-titanium dioxide prepared in Example 3, and sprayed on the soil and corn leaves in Experimental Group 3;

[0053] In the control group, the same amount of modified nano titanium dioxide as that in the experimental group 1 was added to the nutrient.

[0054] Ordinary nano-titanium dioxide was used to make soil fertilizer and foliar fertilizer, and sprayed on the soil and corn leaves in the control group;

[0055] The nutrient agent of the initial group was of the same type and content as those used in the experimental group and the control group. The nitrogen fertilizer required for a single corn ear stage was about 1.215 g. The nitrogen content of the nutrient agent was calculated as 68%, and the nutrient agent requirement for each mu of corn ear stage was about 7 kg. Considering the loss of nitrogen fertilizer in the soil, 10 kg of nutrient agent was applied to each test field. Ten corns were randomly selected from each group, and samples were taken within a 20 cm*20 cm circle around the selected corn. The nitrogen content in the soil was measured and the average value was taken, recorded as "1", and then the soil was put back to its original place. After culturing for a period of time, the sample was taken again and the nitrogen content was measured. The remaining nitrogen content in the soil = the average value of the nitrogen content measured twice / the average value of the nitrogen content measured once*1.

[0056] The corn ear stage is about 35 days, so the corn in the initial group, experimental group 1, experimental group 2, experimental group 3, and control group were cultured under the same culture conditions for 40 days, and then the performance of the soil and corn was tested.

[0057] Table 1

[0058] Initial soil nitrogen content Residual nitrogen content in the soil after 40 days of cultivation Plant growth status Initial Group 1 0.11 good Experimental Group 1 1 0.25 good Experimental Group 2 1 0.24 good Experimental Group 3 1 0.25 good Comparison group 1 0.14 good

[0059] It can be seen from Table 1 that the theoretical residual nitrogen content is about 0.3, but the residual nitrogen content in the initial group is only 0.11. This is because in addition to the nitrogen fertilizer normally consumed by corn growth, part of the nitrogen fertilizer will be lost.

[0060] In the control group, modified nano-titanium dioxide was added to the nutrient agent. Although titanium dioxide itself has a certain nitrogen fixation effect, most of the nitrogen fertilizer was still lost.

[0061] Experimental groups 1-3 used the soil fertilizer and foliar fertilizer of the present invention, which effectively suppressed the loss of nitrogen fertilizer, was beneficial to plant growth, reduced environmental pollution, and reduced the generation of greenhouse effect.

Claims

1. A film-forming spray fertilizer, characterized in that: The spray fertilizer comprises, by weight, 5-10 parts of modified nano titanium dioxide, 100-150 parts of nutrient agent, 4-8 parts of carboxymethyl cellulose potassium, 4-6 parts of dispersant, and 0.2-0.4 parts of cross-linking agent.

2. A film-forming spray fertilizer according to claim 1, characterized in that: The modified nano titanium dioxide comprises 5-10 parts of nano titanium dioxide, 50-60 parts of acrylamide and 1-3 parts of initiator by mass fraction.

3. A film-forming spray fertilizer according to claim 2, characterized in that: The initiator includes any one of sodium bisulfite, potassium bisulfite or ammonium persulfate.

4. The film-forming spray fertilizer according to claim 1, characterized in that: The preparation method of the modified nano titanium dioxide comprises the following steps: A1. Prepare nano titanium dioxide, acrylamide and initiator; A2, dissolving nano titanium dioxide in a container A filled with anhydrous ethanol, stirring evenly to form a nano titanium dioxide solution for standby use; A3, adding acrylamide to the container B containing anhydrous ethanol, stirring evenly to obtain a monomer solution for standby use; A4, adding the nano titanium dioxide solution in A2 to the monomer solution, then adding the initiator and stirring evenly, reacting for 1-2 hours and then drying to obtain the modified nano titanium dioxide.

5. The film-forming spray fertilizer according to claim 1, characterized in that: The nutrient agent comprises 40-50 parts of urea, 10-15 parts of ammonium chloride and 8-10 parts of potassium chloride.

6. The film-forming spray fertilizer according to claim 1, characterized in that: The dispersant includes one or both of lauroyl diethanolamine and sodium hexametaphosphate.

7. The film-forming spray fertilizer according to claim 1, characterized in that: The cross-linking agent includes one or two of N,N-methylenebisacrylamide and polyethylene glycol dimethacrylate.

8. The application method of the film-forming spray fertilizer according to claim 1, characterized in that: The method for applying the fertilizer spraying in the soil comprises the following steps: S101, diluting the nutrient agent and water at a mass ratio of 1:10-20 to form a base solution for standby use; S102, adding potassium carboxymethyl cellulose, modified nano titanium dioxide and a dispersant to the base liquid, then adding a cross-linking agent and stirring evenly, and obtaining a gel-like soil fertilizer after the reaction is completed; S103, spreading the gel soil fertilizer evenly on the soil surface at the roots of the plants.

9. The method for applying a film-forming spray fertilizer according to claim 8, characterized in that: The method for applying the fertilizer by spraying on leaves comprises the following steps: S201, diluting the nutrient agent and water at a mass ratio of 1:1000-1500 to form a base solution for standby use; S202, adding potassium carboxymethyl cellulose, modified nano titanium dioxide and a dispersant to the base liquid, then adding a cross-linking agent and stirring evenly, and obtaining a liquid foliar fertilizer after the reaction is completed; S203, spraying the foliar fertilizer evenly on the back of the leaves of the plants.