Biological fertilizer synergist and application thereof

Abstract

The invention discloses a bio-fertilizer synergist and application thereof, and the bio-fertilizer synergist comprises, by weight, 30-85% of a synergist and 15-30% of an auxiliary agent. The granular bio-fertilizer is obtained by uniformly spraying the bio-fertilizer synergist on the surface of the granular fertilizer and drying at low temperature. According to the biological fertilizer synergist, inorganic fertilizers, organic fertilizers or organic and inorganic fertilizers can be adopted as granular fertilizers, and the biological fertilizer synergist can be suitable for almost all granular fertilizers (except for fertilizers having a killing function on microorganisms or having an antagonistic effect on components in the biological fertilizer synergist) in the current market. Moreover, the production process is simple, the cost is lower, the additional value of the product can be effectively improved, and the production process belongs to a novel fertilizer production process and has a huge market popularization value.

Description

Technical Field

[0001] This invention belongs to the field of microbial fertilizer technology, and in particular relates to a bio-fertilizer enhancer and its application. Background Technology

[0002] Traditional organic fertilizers primarily improve soil quality but do not significantly enhance crop yields. Furthermore, their effects are only apparent with long-term use, making them unpopular with farmers in today's era of significantly shortened agricultural planting cycles. The increasing use of chemical fertilizers has also revealed numerous drawbacks. For example, the overuse of chemical fertilizers has led to eutrophication of rivers and lakes, damaging ecosystems. Excessive nitrate levels in groundwater threaten human health. Long-term application of chemical fertilizers results in soil compaction, reduced organic matter content, and imbalanced microbial communities, hindering sustainable agricultural development.

[0003] The current development direction of fertilizers is the integration of multiple fertilizer benefits, the research of new fertilizers, and the improvement of the quality and efficiency of traditional fertilizers. In response to the current shortcomings in fertilizer use, a fertilizer synergist that can prolong fertilizer effect, improve fertilizer utilization rate, promote crop growth, and increase crop stress resistance can be used in combination with fertilizers. This can increase the added value of traditional fertilizers, integrate multiple fertilizer benefits, conform to the concept of sustainable development, and obtain new fertilizer products that are green, environmentally friendly, and highly efficient.

[0004] Meanwhile, the preparation method of this patent involves uniformly mixing the compound microbial agent with an adjuvant made from any one or more of the following: aminobutyric acid, polyglutamic acid, molasses solution, and chitosan. After that, the mixture is sprayed onto the surface of the granular fertilizer and dried at low temperature. Compared with "A compound microbial fertilizer with high nutrient content and its preparation method (application number: 201410851245.5)," the granular bio-fertilizer prepared by this method can maintain the effective number of live bacteria in the product to the maximum extent. The finished product has a low moisture content. After a 90-day shelf life observation, the number of effective live bacteria shows an upward trend. After 180 days of storage, the appearance is good, and the fertilizer does not show signs of caking, deliquescence, moisture absorption, or bacterial growth. Summary of the Invention

[0005] The first objective of this invention is to provide a bio-fertilizer enhancer; the second objective is to provide a method for applying the bio-fertilizer enhancer.

[0006] The present invention achieves its first objective through the following technical solution: by weight percentage, it comprises 30-85% synergist and 15-30% adjuvant. The synergist, by weight percentage, comprises 40-60% microbial agent, 30-40% vitamin, and 10-30% starch. The microbial agent in the synergist includes any one or at least two of YWF-17-0001, YWF-17-0005, and YWF-17-0003 microbial agents, and each microbial agent has an effective viable count ≥100 billion / g. The vitamin includes a combination of vitamin B and vitamin C. The adjuvant includes any one or at least two of GABA, polyglutamic acid, molasses solution, and chitosan.

[0007] When the functional microbial agent includes Bacillus amyloliquefaciens YWF-17-0001, Bacillus belyssus YWF-17-0003, and Bacillus belyssus YWF-17-0005, the ratio of the three is 1~1.5:1~1.5:1~2. When the functional microbial agents include Bacillus amyloliquefaciens YWF-17-0001 and Bacillus vesiculosus YWF-17-0005, the ratio of the two is 1:1.5~2.

[0008] When the functional microbial agents include Bacillus amyloliquefaciens YWF-17-0001 and Bacillus vesiculosus YWF-17-0003, the ratio of the two is 1:1 to 2.

[0009] When the functional bacterial agent includes Bacillus vesiculosus YWF-17-0003 and Bacillus vesiculosus YWF-17-0005, the ratio of the two is 1~2:1.5~2.

[0010] The additives include any one or at least two of polyglutamic acid, aminobutyric acid, molasses, and chitosan, and the raw materials can be combined in any proportion.

[0011] It also includes 15-30% modifiers, which include lanthanum chloride, cerium nitrate, praseodymium acetate, and neodymium sulfate in a ratio of 1:1:1:1, and the concentrations of lanthanum chloride, cerium nitrate, praseodymium acetate, and neodymium sulfate are all 40-170 mg / L.

[0012] The second objective of this invention is achieved by the following technical solution: the obtained bio-fertilizer enhancer is uniformly sprayed onto the surface of granular fertilizer, and the granular fertilizer is dried in a dryer at 120~150℃ for 10~20 minutes to obtain a bio-fertilizer with enhanced function, wherein the number of effective live bacteria in the bio-fertilizer is ≥1 billion / g.

[0013] The beneficial effects of this invention are as follows: the functional microorganisms in the bio-fertilizer synergist of this invention have the functions of promoting growth, resisting disease, and increasing yield; vitamins have the effect of promoting the activity of functional microorganisms; starch has the function of maintaining the activity of vitamins and functional microorganisms and slowing down the inactivation caused by high temperature during the drying process; aminobutyric acid has the functions of promoting crop growth, improving crop resistance, assisting nutrient absorption, and improving fruit quality; polyglutamic acid has the functions of water retention and drought resistance, nutrient enrichment, promoting root development, and improving crop photosynthesis; molasses solution has the functions of providing crop nutrients, maintaining the activity of microorganisms, and improving soil properties; chitosan has the functions of promoting growth, enhancing disease resistance, improving soil, and improving yield and quality. The prepared bio-fertilizer synergist, when combined with granular fertilizer, works synergistically in the fertilizer to effectively improve soil fertility, improve the root soil environment, reduce the occurrence of soil-borne diseases, and promote fertilizer utilization, while also increasing agricultural yield, improving agricultural product quality, and improving planting efficiency. Secondly, the granular bio-fertilizer produced using the bio-fertilizer enhancer of this invention can effectively extend the fertilizer's shelf life, reduce agricultural production inputs, and reduce nutrient loss. At the same time, the functional microorganisms in the microbial agent, promoted by vitamins and protected by adjuvants such as starch, GABA, polyglutamic acid, molasses, and chitosan, can have a shelf life of more than one year and are more likely to colonize in the soil and survive for a long time, thus exerting a long-term effect on inhibiting pathogenic microorganisms in the soil and promoting crop growth. The bio-fertilizer enhancer of this invention can use inorganic fertilizer, organic fertilizer, or organic-inorganic fertilizer as granular fertilizer, and is applicable to almost all granular fertilizers currently on the market (except for fertilizers that have a killing function against microorganisms or have an antagonistic effect on the components in the bio-fertilizer enhancer); moreover, the production process is simple, the cost is low, and it can effectively improve the added value of the product. It belongs to a new type of fertilizer production process and has great market promotion value. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of the present invention, its specific embodiments are described in detail below.

[0015] The bio-fertilizer synergist of the present invention comprises, by weight percentage, 30-85% synergist and 15-30% adjuvant; wherein, the synergist comprises, by weight percentage, 40-60% microbial inoculant, 30-40% vitamins, and 10-30% starch; The microbial agent includes any one of YWF-17-0001 agent, YWF-17-0005 agent, and YWF-17-0003 agent, or at least two of them; The vitamins include 80% B-complex vitamins and 20% vitamin C.

[0016] The additives include any one or at least two of the following: aminobutyric acid, polyglutamic acid, molasses solution, and chitosan, and the ratio of the four is 1:1:1:1. When the additives are prepared, if more than two components are selected, they are also prepared in an equal ratio of 1:1 or 1:1:1.

[0017] The functional microbial agents include Bacillus amyloliquefaciens YWF-17-0001, Bacillus belyssus YWF-17-0003, and Bacillus belyssus YWF-17-0005, with a ratio of 1~1.5:1~1.5:1~2.

[0018] The functional microbial agents include Bacillus amyloliquefaciens YWF-17-0001 and Bacillus belyssus YWF-17-0005, with a ratio of 1:1.5~2.

[0019] The functional microbial agents include Bacillus amyloliquefaciens YWF-17-0001 and Bacillus belyssus YWF-17-0003, with a ratio of 1:1 to 2.

[0020] The functional microbial agents include Bacillus vesiculosus YWF-17-0003 and Bacillus vesiculosus YWF-17-0005, with a ratio of 1~2:1.5~2.

[0021] The Bacillus amyloliquefaciens YWF-17-0001 bacterial agent is prepared by fermentation and drying of Bacillus amyloliquefaciens YWF-17-0001, Bacillus vesiliflorus YWF-17-0005 bacterial agent is prepared by fermentation and drying of Bacillus vesiliflorus YWF-17-0005, and Bacillus vesiliflorus YWF-17-0003 bacterial agent is prepared by fermentation and drying of Bacillus vesiliflorus YWF-17-0003. All three are solid powders.

[0022] The *Bacillus amyloliquefaciens* YWF-17-0001, with accession number CGMCC No. 23617, was deposited on October 18, 2021, at the China General Microbiological Culture Collection Center, located at No. 3, Courtyard 1, Beichen West Road, Chaoyang District, Beijing; *Bacillus belyssus* (… Bacillus velezensis YWF-17-0005, with accession number CCTCC NO: M 2022753, was deposited on May 30, 2022, at the China Center for Type Culture Collection, Wuhan University, Wuhan, China; Bacillus belye ( Bacillus velezensisYWF-17-0003, with accession number CCTCC NO:M 2022752, was deposited at the China Center for Type Culture Collection on May 30, 2022, at Wuhan University, Wuhan, China.

[0023] The compound vitamin B, vitamin C, and starch mentioned above are all food-grade raw materials in solid powder form.

[0024] The additives include any one or at least two of polyglutamic acid, aminobutyric acid, molasses liquid, and chitosan, and the raw materials can be combined in any proportion; the concentration of polyglutamic acid is 3.5-12%, and the concentration of aminobutyric acid is 50-98%, both of which are liquids.

[0025] The molasses solution and chitosan mentioned are both commercially available products that meet the standard requirements for toxic and harmful substances in fertilizers and can be used in agricultural production.

[0026] When the adjuvant is chitosan, the chitosan should be mixed with water at a ratio of 1:1 to prepare a chitosan solution before use.

[0027] It also includes 15-30% modifier, which includes lanthanum chloride, cerium nitrate, praseodymium acetate, and neodymium sulfate in a ratio of 1:1:1:1. The concentrations of lanthanum chloride, cerium nitrate, praseodymium acetate, and neodymium sulfate are all 40-170 mg / L. When preparing the modifier, if more than two or more components are selected, they are also prepared in a 1:1 or 1:1:1 ratio.

[0028] A method for preparing a bio-fertilizer enhancer is as follows: the enhancer, adjuvant, and modifier are thoroughly mixed by weight percentage to form a mixed liquid, which yields the bio-fertilizer enhancer.

[0029] The application method of the bio-fertilizer synergist is as follows: Take 94-97% of the granular fertilizer by weight for later use, and then take 3-6% of the bio-fertilizer synergist. Spray the prepared bio-fertilizer synergist evenly onto the surface of the granular fertilizer. Then, dry the granular fertilizer in a dryer at 120-150℃ for 10-20 minutes to obtain granular bio-fertilizer. The effective live bacteria count in this bio-fertilizer is ≥ 10 100 million / g.

[0030] The granular fertilizer mentioned is any one of the granular organic fertilizer, granular inorganic fertilizer, or granular organic-inorganic fertilizer available on the market.

[0031] The technical solution of the present invention will be further explained and described below with reference to the embodiments.

[0032] Example 1 A bio-fertilizer enhancer, by weight percentage, comprises 15% modifier, 3% GABA, 12% polyglutamic acid, 17.5% Bacillus amyloliquefaciens YWF-17-0001 bacterial agent, 17.5% Bacillus vesiculosus YWF-17-0003 bacterial agent, 16.8% compound vitamin B, 4.2% vitamin C, and 14% starch, wherein the effective viable count of Bacillus amyloliquefaciens YWF-17-0001 and Bacillus vesiculosus YWF-17-0003 bacterial agents is ≥100 billion / g.

[0033] Example 2 A bio-fertilizer enhancer, by weight percentage, comprises 20% modifier, 15% GABA, 15% molasses solution, 10% Bacillus amyloliquefaciens YWF-17-0001 bacterial agent, 20% Bacillus vesiculosus YWF-17-0005 bacterial agent, 2% compound vitamin B1, 3% vitamin C, and 5% starch, wherein the effective viable count of Bacillus amyloliquefaciens YWF-17-0001 and Bacillus vesiculosus YWF-17-0005 bacterial agents is ≥100 billion / g.

[0034] Example 3 A bio-fertilizer synergist, by weight percentage, comprises 30% modifier, 15% polyglutamic acid, 15% chitosan, 8% Bacillus amyloliquefaciens YWF-17-0001 bacterial agent, 8% Bacillus vesiculosus YWF-17-0003 bacterial agent, 8% Bacillus vesiculosus YWF-17-0005 bacterial agent, 9.6% compound vitamin B, 2.4% vitamin C, and 4% starch, wherein the effective viable count of Bacillus amyloliquefaciens YWF-17-0001, Bacillus vesiculosus YWF-17-0003, and Bacillus vesiculosus YWF-17-0005 is ≥100 billion / g.

[0035] Example 4 A bio-fertilizer enhancer, by weight percentage, comprises 20% modifier, 16% polyglutamic acid, 30% Bacillus vesiculus YWF-17-0003 bacterial agent, 18% compound vitamin B, 5% vitamin C, and 11% starch, wherein the effective viable count of Bacillus vesiculus YWF-17-0003 bacterial agent is ≥100 billion / g.

[0036] Example 5 A bio-fertilizer enhancer, by weight percentage, comprises 10% modifier, 5% GABA, 10% polyglutamic acid, 30% Bacillus vesiculus YWF-17-0005 inoculant, 18% compound vitamin B, 4.5% vitamin C, and 22.5% starch, wherein the effective viable count of Bacillus vesiculus YWF-17-0005 inoculant is ≥100 billion / g.

[0037] Example 6 A bio-fertilizer enhancer, by weight, comprises 4.5% aminobutyric acid, 10.5% chitosan, 17% Bacillus vesiculus YWF-17-0003, 34% Bacillus vesiculus YWF-17-0005, 20.4% compound vitamin B, 5.1% vitamin C, and 8.5% starch, wherein the effective viable count of Bacillus vesiculus YWF-17-0003 and Bacillus vesiculus YWF-17-0005 is ≥100 billion / g.

[0038] Example 7 To verify the effects of different coating methods on the number of viable bacteria in bio-organic fertilizer and to explore the shelf life of samples, this experiment was conducted to provide a theoretical basis for actual production.

[0039] 1. Test time Test date: April 2025.

[0040] 2. Test materials Fertilizer used in the test: granular organic fertilizer; Test synergists: Bacillus amyloliquefaciens YWF-17-0001 bacterial agent (effective viable count ≥100 billion / g); Bacillus vesiculosus YWF-17-0005 bacterial agent (effective viable count ≥100 billion / g); Bacillus vesiculosus YWF-17-0003 bacterial agent (effective viable count ≥100 billion / g); compound vitamin B; vitamin C; starch; Test auxiliaries: GABA, polyglutamic acid, molasses solution, chitosan; Modifier: A mixture of lanthanum chloride, cerium nitrate, praseodymium acetate, and neodymium sulfate, with each of the four components having a concentration of 40~170 mg / L.

[0041] 3. Test methods This experiment aimed to investigate the effects of different additives and production processes on bio-organic fertilizer. Using GABA, polyglutamic acid, molasses solution, and chitosan as additives, small-scale samples were prepared according to the following two production processes. Changes in the effective viable bacteria count of the samples were compared to explore shelf life.

[0042] Process 1: Use a spray bottle to spray the adjuvant onto the surface of the granular organic fertilizer for coating, and then add the synergist to coat the fertilizer granules. This process is completed in a granulator. After that, the sample is dried at a low temperature, with the drying temperature controlled at 120℃ and the drying time being 20 minutes. Process 2: The synergist and additives are uniformly mixed and coated onto the surface of the granular organic fertilizer using a spray bottle. This process is completed in a granulator. Afterward, the sample is dried at a low temperature, controlled at 120℃, for 20 minutes. Specific treatment details are shown in Table 1 below.

[0043] Table 1 Different treatment scenarios

[0044] Each sample was manually prepared to weigh 1 kg and placed in a dry, clean, and sealed self-sealing bag for testing.

[0045] 4. Survey Methods The compounded bio-organic fertilizer samples were left to stand at room temperature for 15 days and 30 days, and their effective viable bacteria count and miscellaneous bacteria rate were measured and the theoretical values ​​were calculated.

[0046] 5. Results and Analysis 5.1 Comparison of Fertilizer Appearance After 10 days of storage, the bio-organic fertilizer produced using Process 1 showed a large amount of mold on its surface, and the fertilizer particles were severely stuck together. After 30 days of storage, the bio-organic fertilizer produced using Process 2 showed no mycelial growth on its surface, and the fertilizer surface was dry and clean, without any sticking together.

[0047] 5.2 Survey of shelf life of fertilizers with different treatments As shown in Table 2, the fertilizer samples prepared by the two processes, when treated with GABA and polyglutamic acid as adjuvants, had higher effective viable bacteria counts at 15d and 30d, while the total bacterial counts of the other two treatments were lower; the fertilizer samples prepared by process two had higher overall effective viable bacteria counts.

[0048] Table 2. Shelf life survey of bio-organic fertilizer

[0049] 6. Conclusion Based on the above investigation, it can be seen that after a period of storage, the bio-organic fertilizer produced by Process 1 is covered with a large amount of mold, which does not meet the product design. Therefore, the production method of Process 2 (i.e. the technology in this invention) is more advantageous for the production of bio-organic fertilizer. The treatment with GABA and polyglutamic acid as adjuvants has a higher number of effective live bacteria than the other two treatments, and is suitable for the production of granular bio-organic fertilizer.

[0050] Example 8

[0051] To verify the application effect of compound fertilizer coated with the bio-fertilizer synergist of this application on Chinese cabbage, a small-scale trial was conducted in a greenhouse to provide a basis for product process improvement.

[0052] 1. Test materials Test crop: Chinese cabbage; Compound fertilizer (N-P2O5-K2O=15-15-15), bio-fertilizer synergist in Example 2.

[0053] 2. Test methods The experiment included three treatments (see Table 3): conventional compound fertilizer, compound fertilizer coated with a bio-fertilizer synergist, and a blank control. Fertilizer was applied at a rate of 30 kg per mu (approximately 0.067 hectares), evenly spread in the plots, then tilled and mixed into the soil. Watering was performed after transplanting the seedlings. Each plot (containing 12 cabbages) constituted one treatment. Except for the type of fertilizer used, all other management practices were the same as conventional field management.

[0054] Table 3 Processing Design

[0055] 2.1 Survey Methodology One month later, the plant height, chlorophyll content, and weight of each cabbage plant were measured. Five uniformly growing cabbages from each plot were measured, the average value was calculated, and an analysis of variance was performed.

[0056] 3. Results record, see Table 4.

[0057] Table 4. Analysis of Agronomic Traits of Chinese Cabbage

[0058] Table 4 shows that the plant height, chlorophyll content, and single plant weight of cabbage treated with compound fertilizer and coated compound fertilizer were all higher than those of the blank control, with the treatment treated with coated compound fertilizer showing the highest levels of all indicators.

[0059] 4. Experimental Conclusions Applying bio-fertilizer enhancers to compound fertilizers can effectively improve fertilizer application efficiency, promote crop yield and income growth, and enhance crop quality.

[0060] Example 9

[0061] 1. Purpose of the experiment Based on the current situation of ginger cultivation, a reasonable fertilization technology plan is formulated using any of the microbial organic-inorganic blended fertilizers prepared in Examples 1-5 of this application. Through comparative demonstration experiments in the same field, the impact on ginger yield is explored, providing technical and fertilizer support for ginger cultivation.

[0062] 2. Test time and location Timeframe: May-December 2025; Location: Heping Village, Dalishu Township, Maguan County, latitude: 23°02′55″N, longitude: 104°14′88″E, altitude: 1586.8 meters.

[0063] 3. Experimental Materials and Methods 3.1 Test Materials Ginger (variety: Jianshui No. 2), test area 200m² 2 ; Fertilizers tested: 25-8-7 (Sichuan Lutianhua Co., Ltd.), 15-5-25 (Yunnan Yuntianhua Co., Ltd.), and microbial organic-inorganic blended fertilizers 17-7-7 and 8-6-18 (Yunnan Yunye Fertilizer Co., Ltd.).

[0064] 3.2 Experimental Methods and Design (1) Selection of experimental site. Select flat, neat, fertile and representative plots to carry out the same field experiment. The planting specifications are based on conventional agricultural operations. (2) Fertilization program design. The experiment set up two treatments: a demonstration area and a control area. The terrain, soil and other conditions were kept relatively consistent. See Table 5 for details.

[0065] Table 5. Fertilizer application rate in the same field comparison experiment of ginger.

[0066] (3) Management Measures. The experiment was conducted from May to December 2025. All management measures, including watering, weeding, fertilization, and pest and disease control, were completed simultaneously on the same day for each treatment. Harvesting took place on December 2nd. At harvest time, 3m sections of land from each treatment were randomly selected. 2 The yield of each plot was calculated by harvesting and weighing separately.

[0067] 4. Experimental Results and Analysis 4.1 Effects of different treatments on ginger yield As shown in Table 6, compared with the control area, the ginger yield in the demonstration area increased by 917.79 kg, with an increase rate of 28.10%.

[0068] Table 6 Comparison of yields under different fertilization treatments

[0069] The effects of different treatments on the economic benefits of ginger are shown in Table 7. Compared with the control area, the yield and output value of ginger in the demonstration area increased by 917.79 kg and 2753.37 yuan per mu, respectively, and the output-input ratio of the demonstration area was greater than that of the control area.

[0070] Table 7 Comparison of economic benefits of different fertilization treatments

[0071] Note: 17-7-7 microbial organic-inorganic blended fertilizer is priced at 2.15 yuan / kg, 8-6-18 microbial organic-inorganic blended fertilizer is priced at 2.5 yuan / kg, compound fertilizer 25-8-7 is priced at 2.8 yuan / kg, and 15-5-25 is priced at 4 yuan / kg. Ginger seed is priced at 5 yuan / kg, and fresh ginger is priced at 3 yuan / kg. The yield-input ratio is calculated per 667m³. 2 Output value per 667m 2 Investment.

[0072] 5. Experimental Conclusions During the experiment, the yield and comprehensive output value of the demonstration area both increased to a certain extent compared with the control area, indicating that under the same fertilization nutrient conditions, the use of microbial organic-inorganic blended fertilizer has a better growth-promoting effect.

Claims

1. A bio-fertilizer synergist, characterized in that: By weight percentage, it includes 30-85% synergist and 15-30% adjuvant; wherein, the synergist, by weight percentage, includes 40-60% microbial agent, 30-40% vitamin, and 10-30% starch.

2. The bio-fertilizer synergist according to claim 1, characterized in that: The microbial agents include any one or at least two of YWF-17-0001, YWF-17-0005, and YWF-17-0003, and the effective viable count of each agent is ≥100 billion / g.

3. The bio-fertilizer synergist according to claim 2, characterized in that: The YWF-17-0001 bacterial agent is prepared by fermentation and drying of Bacillus amyloliquefaciens, the YWF-17-0005 bacterial agent is prepared by fermentation and drying of Bacillus belyssus, and the YWF-17-0003 bacterial agent is prepared by fermentation and drying of Bacillus belyssus. All three are solid powders.

4. The bio-fertilizer synergist according to claim 1, characterized in that: The vitamins mentioned include B-complex vitamins and vitamin C.

5. The bio-fertilizer synergist according to claim 1, characterized in that: The additives include any one or at least two of the following: aminobutyric acid, polyglutamic acid, molasses solution, and chitosan.

6. The bio-fertilizer synergist according to claim 5, characterized in that: The concentration of polyglutamic acid is 3.5-12%, and the concentration of aminobutyric acid is 50-98%, both of which are liquids.

7. The bio-fertilizer synergist according to claim 1, characterized in that: It also includes 15-30% modifiers, which include lanthanum chloride, cerium nitrate, praseodymium acetate, and neodymium sulfate in a ratio of 1:1:1:1, and the concentrations of lanthanum chloride, cerium nitrate, praseodymium acetate, and neodymium sulfate are all 40-170 mg / L.

8. The application of the bio-fertilizer synergist according to any one of claims 1 to 7, characterized in that: The bio-fertilizer enhancer is evenly sprayed onto the surface of granular fertilizer, so that the bio-fertilizer enhancer adheres to the granules of the fertilizer. After low-temperature drying in a dryer, a bio-fertilizer with enhanced function is obtained.

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