Nutritional functional granulated fertilizer as well as preparation method and application thereof

Abstract

The invention relates to the technical field of fertilizer processing, in particular to a nutritional functional granulated fertilizer and a preparation method and application thereof. Comprising organic nutrients and inorganic nutrients; the inorganic nutrient is prepared from the following raw materials in parts by weight: 12 to 15 parts of urea, 12 to 15 parts of ammonium sulfate, 15 to 20 parts of monoammonium phosphate, 22 to 27 parts of potassium nitrate, 1.2 to 1.5 parts of calcium nitrate, 1.2 to 1.5 parts of magnesium sulfate, 1.0 to 1.2 parts of ferrous sulfate, 1.0 to 1.2 parts of zinc sulfate and 1.0 to 1.2 parts of borax; the organic nutrient is prepared from the following raw materials in parts by weight: 6 to 10 parts of glutamic acid, 5 to 9 parts of glycine, 7 to 10 parts of polyacrylamide, 1 to 4 parts of modified starch, 2 to 5 parts of soybean extract, 3 to 8 parts of rice bran extract, 2 to 6 parts of polyvinyl alcohol, 3 to 15 parts of biological enzyme and 10 to 25 parts of functional strains, and the functional strains are bacillus licheniformis NCT-1 and pediococcus pentosaceus.

Description

Technical Field

[0001] This invention relates to the field of fertilizer processing technology, and more specifically, to a nutrient-functional granular fertilizer, its preparation method, and its application. Background Technology

[0002] Nutritional functional granular fertilizers are fertilizers designed with specific formulations to provide crops with comprehensive nutrients and, according to the needs of crops at different growth stages, regulate crop growth, improve stress resistance, enhance quality, and increase yield. These fertilizers not only contain major nutrients (such as nitrogen, phosphorus, and potassium) but may also include trace elements and other beneficial substances to meet the specific needs of crops.

[0003] The main components of nutrient-functional granular fertilizers include basic fertilizers (such as phosphate fertilizers, ammonium phosphate, and ternary compound fertilizers), elemental sulfur, nano-sized magnesium-containing powder, nano-sized zinc-containing powder, stearates, and straight-chain alkane paraffins, totaling 100%. In addition, some granular fertilizers may also contain other trace elements (such as iron, manganese, and boron) and organic matter (such as humic acid and amino acids) to enhance the fertilizer's function.

[0004] The shortcomings of existing nutrient-functional granular fertilizers are that they mostly employ slow-release or controlled-release technologies (such as sulfur coating and polymer coating), resulting in a slow nutrient release rate. For crops that require rapid nutrient replenishment (such as seedlings lacking fertilizer or plants under stress), they may not be able to meet their needs in a timely manner. Summary of the Invention

[0005] This invention provides a nutrient-functional granular fertilizer, its preparation method, and its application. The prepared nutrient-functional granular fertilizer can improve the nutrient release rate, provide nutrients to crops that need rapid nutrient replenishment in a timely manner, and repair the soil.

[0006] In a first aspect, the present invention provides a nutrient-functional granular fertilizer, wherein the nutrient-functional granular fertilizer comprises organic nutrients and inorganic nutrients; The inorganic nutrients comprise the following raw materials in parts by weight: 12-15 parts urea, 12-15 parts ammonium sulfate, 15-20 parts monoammonium phosphate, 22-27 parts potassium nitrate, 1.2-1.5 parts calcium nitrate, 1.2-1.5 parts magnesium sulfate, 1.0-1.2 parts ferrous sulfate, 1.0-1.2 parts zinc sulfate, and 1.0-1.2 parts borax. The organic nutrients include the following raw materials in parts by weight: 6-10 parts glutamic acid, 5-9 parts glycine, 7-10 parts polyacrylamide, 1-4 parts modified starch, 2-5 parts soybean extract, 3-8 parts rice bran extract, 2-6 parts polyvinyl alcohol, 3-15 parts bio-enzymes, and 10-25 parts functional strains, of which Bacillus licheniformis NCT-1 and Pediococcus pentosaceus are functional strains.

[0007] Preferably, Bacillus licheniformis NCT-1 has the biological preservation number CGMCCNO:28298 and is deposited at the China General Microbiological Culture Collection Center.

[0008] Preferably, the biodeposit number of Pediococcus pentosaceus is ATCC 33316, which is deposited at the American Center for Type Culture Collection.

[0009] Preferably, the weight ratio of Bacillus licheniformis to Pediococcus pentosaceus is 1-2:2-5.

[0010] Preferably, the modified starch is prepared by modifying buckwheat starch with octenyl succinic anhydride, and the modified starch is a water-in-oil Pickering nanoemulsion with an average particle size of 300-400 nm.

[0011] Preferably, the bioenzyme is a protease, pectinase, subtilisin, and cellulase, and the mass ratio of the protease, pectinase, subtilisin, and cellulase is 1-1.2:1.5-1.8:2.1-2.3:1-3.

[0012] Preferably, the soybean extract is obtained by dissolving soybean powder in ethanol or methanol, and then refluxing, filtering, concentrating, and purifying the mixture.

[0013] Preferably, the rice bran extract is prepared by mixing defatted rice bran with water at a material-to-liquid ratio, ultrasonically treating the mixture, centrifuging to separate the extract, adjusting the pH to neutral, precipitating polysaccharides or proteins by alcohol precipitation, and then centrifuging again to obtain the rice bran extract.

[0014] Secondly, the present invention provides a method for preparing a nutrient-functional granular fertilizer, comprising the following steps: (1) Bacillus licheniformis NCT-1 and Pediococcus pentosaceus were fermented separately to obtain a first fermentation broth and a second fermentation broth. The viable cell count in both the first and second fermentation broths was 50.0 × 10⁻⁶. 8 More than 1 piece / g; (2) The adsorption carrier is adsorbed onto the first fermentation broth and the second fermentation broth respectively to obtain a first mixture and a second mixture respectively; the mass ratio of the first mixture to the second mixture is 1:5; the adsorption carrier is humic acid; (3) The first mixture is mixed with the second mixture to obtain a third mixture, and then mixed with inorganic nutrients, glutamic acid, glycine, polyacrylamide, modified starch, soybean extract, rice bran extract, polyvinyl alcohol and biological enzymes to obtain a nutrient functional granular fertilizer.

[0015] Thirdly, this invention provides an application of a nutrient-functional granular fertilizer in soil remediation.

[0016] In summary, the present invention has the following beneficial effects: 1. The nutrient-functional granular fertilizer prepared by this invention is a functional fertilizer that not only provides nutrition to crops but also has one or more functions beyond fertilizer. Its functions are mainly reflected in: taking soil health as the starting point, meeting the different needs of different crops at different growth stages, and ultimately achieving a dual improvement in the quality and yield of agricultural products.

[0017] 2. The *Bacillus licheniformis* in this invention can secrete various enzymes (such as proteases, lipases, amylases, and cellulases). These enzymes can decompose organic matter in the soil, release nutrients, improve soil fertility, and simultaneously improve soil aggregate structure, enhancing the soil's water and fertilizer retention capacity. *Bacillus licheniformis* inhibits the growth of harmful pathogens in the soil through the secretion of antibacterial substances (such as antibiotics and bacteriocins) and competitive mechanisms, thereby reducing plant diseases and improving crop resistance. *Pediococcus pentosaceus* can decompose phosphorus in the soil by secreting phytase, thereby increasing the content of available phosphorus in the soil, and thus promoting plant growth and increasing crop yield. *Pediococcus pentosaceus* can be used to ferment organic fertilizers, for example, improving fertilizer quality and increasing organic acid content through its fermentation process, thereby improving fertilizer utilization. *Pediococcus pentosaceus* can produce bacteriocins or bacteriocin-like substances, which have significant antibacterial activity in the microbial ecosystem and can inhibit the growth of pathogens. Bacillus licheniformis inhibits the growth of pathogens and disrupts their cell structure by secreting antibiotics and lysozyme. When used in combination, they form a stronger antimicrobial network, effectively reducing the number of harmful microorganisms in the soil and thus improving soil health. Bacillus licheniformis secretes plant growth regulators such as gibberellins and cytokinins, promoting root development and plant growth while enhancing crop disease resistance. Pediococcus pentosaceus also possesses antimicrobial capabilities, further inhibiting the invasion of plant pathogens. Therefore, their combined action can significantly improve crop emergence rate, survival rate, and disease resistance. Bacillus licheniformis decomposes organic matter, increasing soil organic matter content, improving soil structure, and enhancing soil water and fertilizer retention capacity. Pediococcus pentosaceus, through its metabolites, further promotes the growth of beneficial microorganisms in the soil, thereby maintaining soil ecological balance.

[0018] 3. The nutrient-functional granular fertilizer prepared by this invention can improve the nutrient release rate, provide nutrients to crops that need rapid nutrient replenishment in a timely manner, and repair the soil.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the scope of protection of the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the embodiments. It should be noted that: unless otherwise specified, the conditions in the following embodiments are carried out according to conventional conditions or the conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following embodiments can be obtained from commercially available sources.

[0021] Example Example 1 A nutrient-functional granular fertilizer, comprising organic nutrients and inorganic nutrients; The inorganic nutrients include the following raw materials in parts by weight: 12 parts urea, 12 parts ammonium sulfate, 15 parts monoammonium phosphate, 22 parts potassium nitrate, 1.2 parts calcium nitrate, 1.2 parts magnesium sulfate, 1.0 part ferrous sulfate, 1.0 part zinc sulfate, and 1.0 part borax. The organic nutrients consist of the following raw materials by weight: 6 parts glutamic acid, 5 parts glycine, 7 parts polyacrylamide, 1 part modified starch, 2 parts soybean extract, 3 parts rice bran extract, 2 parts polyvinyl alcohol, 3 parts bio-enzyme, and 10 parts functional strains, namely Bacillus licheniformis NCT-1 and Pediococcus pentosaceus. The weight ratio of Bacillus licheniformis to Pediococcus pentosaceus is 1:2.

[0022] The modified starch was prepared by modifying 150g of tartary buckwheat starch with 25g of octenyl succinic anhydride. The modified starch was a water-in-oil Pickering nanoemulsion with an average particle size of 300nm.

[0023] The biological enzymes are protease, pectinase, subtilisinase, and cellulase, with a mass ratio of 1:1.5:2.1:1.

[0024] A method for preparing a nutrient-functional granular fertilizer includes the following steps: (1) Bacillus licheniformis NCT-1 and Pediococcus pentosaceus were fermented separately to obtain a first fermentation broth and a second fermentation broth. The viable cell count in the first fermentation broth and the second fermentation broth was 50.0 × 10⁻⁶. 8 pcs / g; (2) The adsorption carrier is adsorbed onto the first fermentation broth and the second fermentation broth respectively to obtain the first mixture and the second mixture respectively; the mass ratio of the first mixture to the second mixture is 1:5; the adsorption carrier is humic acid; (3) The first mixture is mixed with the second mixture to obtain the third mixture, and then mixed with inorganic nutrients, glutamic acid, glycine, polyacrylamide, modified starch, soybean extract, rice bran extract, polyvinyl alcohol and biological enzymes to obtain a nutrient functional granular fertilizer.

[0025] Example 2 A nutrient-functional granular fertilizer, comprising organic nutrients and inorganic nutrients; The inorganic nutrients include the following raw materials in parts by weight: 13 parts urea, 14 parts ammonium sulfate, 18 parts monoammonium phosphate, 25 parts potassium nitrate, 1.3 parts calcium nitrate, 1.4 parts magnesium sulfate, 1.1 parts ferrous sulfate, 1.1 parts zinc sulfate, and 1.1 parts borax. The organic nutrients consist of the following raw materials by weight: 8 parts glutamic acid, 8 parts glycine, 9 parts polyacrylamide, 2 parts modified starch, 3 parts soybean extract, 5 parts rice bran extract, 4 parts polyvinyl alcohol, 9 parts bio-enzymes, and 18 functional strains, namely Bacillus licheniformis NCT-1 and Pediococcus pentosaceus. The weight ratio of Bacillus licheniformis to Pediococcus pentosaceus is 2:3.

[0026] The modified starch was prepared by modifying 200g of tartary buckwheat starch with 21g of octenyl succinic anhydride. The modified starch was a water-in-oil Pickering nanoemulsion with an average particle size of 400 nm.

[0027] The bioenzymes are protease, pectinase, subtilisinase, and cellulase, with a mass ratio of 1.1:1.6:2.2:1.

[0028] A method for preparing a nutrient-functional granular fertilizer includes the following steps: (1) Bacillus licheniformis NCT-1 and Pediococcus pentosaceus were fermented separately to obtain a first fermentation broth and a second fermentation broth. The viable cell count in the first fermentation broth and the second fermentation broth was 50.0 × 10⁻⁶. 8 pcs / g; (2) The adsorption carrier is adsorbed onto the first fermentation broth and the second fermentation broth respectively to obtain the first mixture and the second mixture respectively; the mass ratio of the first mixture to the second mixture is 1:5; the adsorption carrier is humic acid; (3) The first mixture is mixed with the second mixture to obtain the third mixture, and then mixed with inorganic nutrients, glutamic acid, glycine, polyacrylamide, modified starch, soybean extract, rice bran extract, polyvinyl alcohol and biological enzymes to obtain a nutrient functional granular fertilizer.

[0029] Example 3 A nutrient-functional granular fertilizer, comprising organic nutrients and inorganic nutrients; The inorganic nutrients include the following raw materials in parts by weight: 15 parts urea, 15 parts ammonium sulfate, 20 parts monoammonium phosphate, 27 parts potassium nitrate, 1.5 parts calcium nitrate, 1.5 parts magnesium sulfate, 1.2 parts ferrous sulfate, 1.2 parts zinc sulfate, and 1.2 parts borax. The organic nutrients consist of the following raw materials by weight: 10 parts glutamic acid, 9 parts glycine, 10 parts polyacrylamide, 4 parts modified starch, 5 parts soybean extract, 8 parts rice bran extract, 6 parts polyvinyl alcohol, 15 parts bio-enzymes, and 25 parts functional strains, namely Bacillus licheniformis NCT-1 and Pediococcus pentosaceus. The weight ratio of Bacillus licheniformis to Pediococcus pentosaceus is 2:5.

[0030] The modified starch was prepared by modifying 300g of buckwheat starch with 32g of octenyl succinic anhydride. The modified starch was a water-in-oil Pickering nanoemulsion with an average particle size of 300nm.

[0031] The biological enzymes are protease, pectinase, subtilisinase, and cellulase, with a mass ratio of 1.2:1.8:2.3:3.

[0032] A method for preparing a nutrient-functional granular fertilizer includes the following steps: (1) Bacillus licheniformis NCT-1 and Pediococcus pentosaceus were fermented separately to obtain a first fermentation broth and a second fermentation broth. The viable cell count in the first fermentation broth and the second fermentation broth was 50.0 × 10⁻⁶. 8 pcs / g; (2) The adsorption carrier is adsorbed onto the first fermentation broth and the second fermentation broth respectively to obtain the first mixture and the second mixture respectively; the mass ratio of the first mixture to the second mixture is 1:5; the adsorption carrier is humic acid; (3) The first mixture is mixed with the second mixture to obtain the third mixture, and then mixed with inorganic nutrients, glutamic acid, glycine, polyacrylamide, modified starch, soybean extract, rice bran extract, polyvinyl alcohol and biological enzymes to obtain a nutrient functional granular fertilizer.

[0033] Comparative Example 1 The difference from Example 1 is that no functional bacterial strains were added.

[0034] Comparative Example 2 The difference from Example 1 is that no biological enzymes were added.

[0035] Comparative Example 3 The difference from Example 1 is that no modified starch was added.

[0036] Performance testing: Table 1 Performance Test Results Table 1 shows that the nutrient-functional granular fertilizer prepared in this invention has a good effect on increasing the pH value of acidic soil and fixing the heavy metal lead. This indicates that the prepared nutrient-functional granular fertilizer can improve the nutrient release rate, provide nutrients to crops that need rapid nutrient replenishment in a timely manner, and repair the soil.

[0037] The above description is merely an exemplary embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A nutrient-functional granular fertilizer, characterized in that, The nutritional functional granular fertilizer includes organic nutrients and inorganic nutrients; The inorganic nutrients comprise the following raw materials in parts by weight: 12-15 parts urea, 12-15 parts ammonium sulfate, 15-20 parts monoammonium phosphate, 22-27 parts potassium nitrate, 1.2-1.5 parts calcium nitrate, 1.2-1.5 parts magnesium sulfate, 1.0-1.2 parts ferrous sulfate, 1.0-1.2 parts zinc sulfate, and 1.0-1.2 parts borax. The organic nutrients include the following raw materials in parts by weight: 6-10 parts glutamic acid, 5-9 parts glycine, 7-10 parts polyacrylamide, 1-4 parts modified starch, 2-5 parts soybean extract, 3-8 parts rice bran extract, 2-6 parts polyvinyl alcohol, 3-15 parts bio-enzymes, and 10-25 parts functional strains, of which Bacillus licheniformis NCT-1 and Pediococcus pentosaceus are functional strains.

2. The nutrient-functional granular fertilizer according to claim 1, characterized in that, The biological preservation number of Bacillus licheniformis NCT-1 is CGMCC NO: 28298, and it is deposited at the China General Microbiological Culture Collection Center of the China Association for the Preservation and Management of Microbial Cultures.

3. The nutrient-functional granular fertilizer according to claim 1, characterized in that, Pediococcus pentosaceus has the biodeposit number ATCC 33316 and is deposited at the American Center for Type Culture Collection.

4. The nutrient-functional granular fertilizer according to claim 1, characterized in that, The weight ratio of Bacillus licheniformis to Pediococcus pentosaceus is 1-2:2-5.

5. The nutrient-functional granular fertilizer according to claim 1, characterized in that, The modified starch is prepared by modifying buckwheat starch with octenyl succinic anhydride. The modified starch is a water-in-oil Pickering nanoemulsion with an average particle size of 300-400 nm.

6. The nutrient-functional granular fertilizer according to claim 1, characterized in that, The bioenzyme is a protease, pectinase, subtilisin, and cellulase, and the mass ratio of the protease, pectinase, subtilisin, and cellulase is 1-1.2:1.5-1.8:2.1-2.3:1-3.

7. The nutrient-functional granular fertilizer according to claim 1, characterized in that, The soybean extract is obtained by dissolving soybean powder in ethanol or methanol, and then refluxing, filtering, concentrating, and purifying the mixture.

8. The nutrient-functional granular fertilizer according to claim 1, characterized in that, The rice bran extract is obtained by mixing defatted rice bran with water at a material-to-liquid ratio, ultrasonically treating the mixture, centrifuging to separate the extract, adjusting the pH to neutral, precipitating polysaccharides or proteins by alcohol precipitation, and then centrifuging again.

9. The method for preparing the nutrient-functional granular fertilizer according to any one of claims 1-8, characterized in that, Includes the following steps: (1) Bacillus licheniformis NCT-1 and Pediococcus pentosaceus were fermented separately to obtain a first fermentation broth and a second fermentation broth. The viable cell count in both the first and second fermentation broths was 50.0 × 10⁻⁶. 8 More than 1 piece / g; (2) The adsorption carrier is adsorbed onto the first fermentation broth and the second fermentation broth respectively to obtain a first mixture and a second mixture respectively; the mass ratio of the first mixture to the second mixture is 1:5; the adsorption carrier is humic acid; (3) The first mixture is mixed with the second mixture to obtain a third mixture, and then mixed with inorganic nutrients, glutamic acid, glycine, polyacrylamide, modified starch, soybean extract, rice bran extract, polyvinyl alcohol and biological enzymes to obtain a nutrient functional granular fertilizer.

10. The application of a nutrient-functional granular fertilizer as described in any one of claims 1-8 in soil remediation.

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