Preparation method of novel anti-crystallization urea ammonium nitrate liquid fertilizer and obtained product

Abstract

The invention belongs to the field of agricultural fertilizer preparation, and particularly relates to a preparation method of a novel anti-crystallization urea ammonium nitrate liquid fertilizer and an obtained product. The method is realized through the following steps: firstly, mixing urea and an ammonium nitrate solution in proportion, and adding a proper amount of water for dissolving to obtain a mixed solution; adding ammonium phosphate, a potash fertilizer, trace elements and a plant growth regulator into the solution; and uniformly stirring the mixture, then adding the crystal inhibitor, and uniformly stirring to obtain the urea ammonium nitrate liquid fertilizer. According to the liquid fertilizer provided by the invention, the nitrogen source is reasonably proportioned, and the liquid fertilizer can be adjusted according to the growth cycles and nitrogen demand of different crops, so that the effect of the fertilizer is maximized. According to the fertilizer, the environmental pollution risk is reduced while the crop yield and quality are improved, and agricultural sustainable development is facilitated. (2) functional components are added into the liquid fertilizer provided by the invention, and various functional components such as ammonium phosphate, a potassium fertilizer, trace elements and a plant growth regulator are added into the urea ammonium nitrate liquid fertilizer, so that the yield and quality of crops are favorably improved, and the growth balance and stability of the crops are promoted.

Description

Technical Field

[0001] The invention belongs to the field of agricultural fertilizer preparation, in particular to a preparation method of a novel anti-crystallization urea ammonium nitrate liquid fertilizer and the obtained product. Background Art

[0002] In the process of agricultural development, the application of fertilizers is of great significance for improving crop yield and quality. However, traditional fertilizer products often have certain limitations, such as environmental pollution and poor crop adaptability. In order to solve these problems, researchers are committed to developing new environmentally friendly, efficient and adaptable fertilizer products. Urea ammonium nitrate liquid fertilizer, as a new type of fertilizer, has broad application prospects. Urea and ammonium nitrate are the main nitrogen sources for plant growth and play a key role in the growth and development of crops. However, excessive use of a single nitrogen source may cause environmental pollution and affect soil quality. In addition, different crops have different requirements and proportions for nitrogen elements during their growth cycle. Therefore, how to achieve a reasonable ratio of nitrogen sources in fertilizers to meet the needs of various crops has become a major challenge in the field of agricultural fertilizers.

[0003] However, affected by various inorganic salts such as nitrogen, phosphorus, potassium, or components of liquid fertilizers, at different concentrations or temperatures, inorganic salt components will crystallize and precipitate under low temperatures or high concentrations, affecting fertilizer efficiency, and in subsequent application processes, problems such as clogging of construction equipment may occur. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a method for preparing a novel anti-crystallization urea ammonium nitrate liquid fertilizer. The liquid fertilizer prepared by the method provided by the present invention can be adjusted according to the growth cycle and nitrogen demand of different crops to maximize the fertilizer effect, and can effectively avoid crystallization and precipitation of the fertilizer under low temperature conditions.

[0005] Another object of the present invention is to provide a urea ammonium nitrate liquid fertilizer prepared by the above method.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: The present invention provides a method for preparing a novel crystallization-resistant urea ammonium nitrate liquid fertilizer, comprising the following steps: (1) Mix urea and ammonium nitrate solution in proportion, add an appropriate amount of water to dissolve, and obtain a mixed solution; (2) adding ammonium phosphate, potash fertilizer, trace elements and plant growth regulators to the solution; (3) Stir the above mixture evenly, then add the crystal inhibitor, and stir evenly to obtain urea ammonium nitrate liquid fertilizer.

[0007] Furthermore, in step (1), the mass ratio of urea to ammonium nitrate solution is 3-5:2-3.

[0008] Furthermore, in step (2), the mass ratio of urea to ammonium phosphate is 5:1; the mass ratio of urea to potash fertilizer is 10:1; and the mass ratio of urea, trace elements and plant growth regulators is 40-50:1:1.

[0009] Furthermore, in step (2), the trace element is boron; and the plant growth regulator is brassinolide.

[0010] Furthermore, in step (3), the amount of the crystal inhibitor added is 0.3-0.4% of the total mass of the mixture.

[0011] Furthermore, the crystal inhibitor is composed of the following raw materials in parts by weight: 2 parts of sodium N-lauroyl sarcosinate, 0.5 parts of tetrasodium N,N-disuccinyl-L-cystine, and 0.1 parts of pullulan.

[0012] The present invention also provides a urea ammonium nitrate liquid fertilizer prepared by the preparation method.

[0013] The beneficial effects of the present invention are: (1) The liquid fertilizer provided by the present invention can be adjusted according to the growth cycle and nitrogen demand of different crops by reasonably proportioning the nitrogen source, thereby maximizing the fertilizer effect. While improving crop yield and quality, the fertilizer reduces the risk of environmental pollution and is conducive to the sustainable development of agriculture. (2) The liquid fertilizer provided by the present invention adds functional components. Multiple functional components such as ammonium phosphate, potassium fertilizer, trace elements and plant growth regulators are added to urea ammonium nitrate liquid fertilizer, which helps to improve crop yield and quality and promote the balance and stability of crop growth; (3) The urea ammonium nitrate liquid fertilizer prepared by the present invention has good fluidity and permeability, is easily absorbed by crops, improves fertilizer utilization rate, effectively avoids crystallization of fertilizer under low temperature conditions, and solves the problems of agglomeration and crystallization of liquid fertilizer at low temperature or too high concentration; (4) The fertilizer of the present invention reduces the impact on the environment by optimizing the formula and preparation process, and is suitable for food crops, cash crops and special crops, meeting the nutritional requirements of different crops and having wide adaptability; it has significant economic, social and ecological benefits, helps to improve agricultural production efficiency and promote sustainable agricultural development. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The process flow chart for the overall production of urea ammonium nitrate liquid fertilizer; Figure 2This is a comparison chart of the effects of urea ammonium nitrate liquid fertilizer on tomatoes. DETAILED DESCRIPTION

[0015] In order to better illustrate the technical solution of the present invention, the urea ammonium nitrate liquid fertilizer of the present invention and the preparation method thereof are described in detail below through specific implementation methods.

[0016] The overall process flow chart of the present invention is as follows Figure 1 shown.

[0017] The mass concentration of the ammonium nitrate solution used in the present invention is 92%.

[0018] Example 1 Take 500kg of urea and 300kg of ammonium nitrate solution and prepare urea ammonium nitrate liquid fertilizer according to the following steps: (1) Mix urea and ammonium nitrate in the above proportions, add 25% of water to dissolve the mixture, and obtain a solution; (2) Add 100 kg of ammonium phosphate, 50 kg of potash fertilizer, 10 kg each of the trace element boron and brassinolide to the solution; (3) The above mixture is stirred evenly, and a crystal inhibitor (2 parts of sodium N-lauroyl sarcosinate, 0.5 parts of tetrasodium N,N-disuccinyl-L-cystine, and 0.1 parts of pullulan) accounting for 0.3% of the whole mixture is added to obtain urea ammonium nitrate liquid fertilizer.

[0019] According to the growth cycle and nitrogen demand of different crops, the ratio of urea to ammonium nitrate can be appropriately adjusted. In this embodiment, the ratio of urea to ammonium nitrate is 5:3, which is suitable for most crops.

[0020] Example 2 Take 600kg of urea and 400kg of ammonium nitrate solution and prepare urea ammonium nitrate liquid fertilizer according to the following steps: (1) Mix urea and ammonium nitrate in the above proportions and add 25% of the mixture to dissolve; (2) Add 120 kg of ammonium phosphate, 60 kg of potash fertilizer, 15 kg each of trace element boron and brassinolide to the solution; (3) The above mixture is stirred evenly, and a crystal inhibitor (2 parts of sodium N-lauroyl sarcosinate, 0.5 parts of tetrasodium N,N-disuccinyl-L-cystine, and 0.1 parts of pullulan) accounting for 0.35% of the whole mixture is added to obtain urea ammonium nitrate liquid fertilizer.

[0021] In this embodiment, the ratio of urea to ammonium nitrate is 3:2, which is suitable for crops with higher nitrogen requirements.

[0022] Comparative Example 1 Take 500kg of urea and 300kg of ammonium nitrate solution and prepare urea ammonium nitrate liquid fertilizer according to the following steps: (1) Mix urea and ammonium nitrate solution in the above proportions, add 25% water to dissolve the mixture, and obtain a solution; (2) Add 100 kg of ammonium phosphate, 50 kg of potash fertilizer, 10 kg each of the trace element boron and brassinolide to the solution; (3) The above mixture is stirred evenly, and a crystal inhibitor (2 parts of sodium N-lauroyl sarcosinate and 0.5 parts of tetrasodium N,N-disuccinyl-L-cystine) accounting for 0.3% of the whole mixture is added to obtain urea ammonium nitrate liquid fertilizer.

[0023] Comparative Example 2 Take 500kg of urea and 300kg of ammonium nitrate solution and prepare urea ammonium nitrate liquid fertilizer according to the following steps: (1) Mix urea and ammonium nitrate solution in the above proportions, add 25% of water to dissolve the mixture, and obtain a solution; (2) Add 100 kg of ammonium phosphate, 50 kg of potash fertilizer, 10 kg each of trace element boron and brassinolide to the solution; (3) The above mixture is stirred evenly, and a crystal inhibitor (sodium N-lauroyl sarcosinate) accounting for 0.3% of the whole mixture is added to obtain urea ammonium nitrate liquid fertilizer.

[0024] Effect Example 1 The fertilizers prepared in Example 1-2 and Comparative Example 1-2 were stored at 0°C. Ten samples were placed in each group and the samples were sealed and stored away from light. The specific results are shown in Table 1.

[0025] Table 1 Effect Example 2 The urea ammonium nitrate liquid fertilizer prepared in the embodiment and the comparative example was tested for fertilizer efficiency on economic crops (tomatoes) in Zhumadian, Henan Province. The usage amount per mu of land was 25 kg, and it was diluted 300 times for use. The fertilizers used were all products stored for half a year; the experimental land for each group was the same.

[0026] The fresh weight and dry weight of the grown tomatoes were tested, and samples were randomly selected from the experimental field. The specific testing method was as follows: take a 500 ml beaker, wash, dry, weigh, and record the weight of the cup; cut all the biomass of the aboveground part of tomatoes that have grown for 50 days, put them into the prepared beakers respectively, weigh the weight, and calculate the weight difference, which is the fresh weight of the tomatoes; put the beaker containing tomatoes into an oven at 70°C and dry it to constant weight, weigh the weight, and calculate the weight difference, which is the dry weight of wheat or tomatoes.

[0027] Specific results such as Figure 2 As shown. Figure 2It can be seen that the liquid fertilizer prepared by the present invention is applied to tomatoes, and its fresh weight and dry weight are better than the fertilizer in the comparative example. In addition, the fertilizer prepared in Example 1 has a final tomato yield increased by about 5% compared with that in Comparative Example 1, and the crop quality and appearance are ideal.

Claims

1. A method for preparing a novel crystal-resistant urea ammonium nitrate liquid fertilizer, characterized in that: The following steps are involved: (1) Mix urea and ammonium nitrate solution in proportion, add an appropriate amount of water to dissolve, and obtain a mixed solution; (2) adding ammonium phosphate, potash fertilizer, trace elements and plant growth regulators to the solution; (3) Stir the above mixture evenly, then add the crystal inhibitor, and stir evenly to obtain urea ammonium nitrate liquid fertilizer.

2. The preparation method according to claim 1, characterized in that: In step (1), the mass ratio of urea to ammonium nitrate solution is 3-5:2-3.

3. The preparation method according to claim 1 or 2, characterized in that: In step (2), the mass ratio of urea to ammonium phosphate is 5:1; the mass ratio of urea to potash fertilizer is 10:1; and the mass ratio of urea, trace elements and plant growth regulators is 40-50:1:

1.

4. The preparation method according to claim 1 or 3, characterized in that: In step (2), the trace element is boron; and the plant growth regulator is brassinolide.

5. The preparation method according to any one of claims 1 to 4, characterized in that: In step (3), the amount of the crystal inhibitor added is 0.3-0.4% of the total mass of the mixture.

6. The preparation method according to claim 5, characterized in that: The crystal inhibitor is composed of the following raw materials in parts by weight: 2 parts of sodium N-lauroyl sarcosinate, 0.5 parts of tetrasodium N,N-disuccinyl-L-cystine, and 0.1 parts of pullulan.

7. A urea ammonium nitrate liquid fertilizer prepared by the preparation method according to any one of claims 1 to 6.

Images