Fertilizer synergist for promoting absorption of compound fertilizer as well as preparation method and application of fertilizer synergist

Abstract

The invention discloses a fertilizer synergist for promoting absorption of a compound fertilizer and a preparation method and application thereof, and belongs to the technical field of fertilizers, the fertilizer synergist is prepared from the following raw materials in parts by weight: 1-3 parts of gamma-polyglutamic acid, 0.2-0.5 part of sodium humate, 3-8 parts of crop straw, 0.5-0.8 part of biological enzyme, 2-4 parts of amino acid and 1-2 parts of a microbial agent. The preparation method comprises the following steps: dissolving the biological enzyme, the microbial agent and the amino acid in water to obtain a mixed solution for soaking crop straws, drying the soaked crop straws, crushing, uniformly mixing with the gamma-polyglutamic acid and the sodium humate, and granulating to obtain the fertilizer synergist for promoting the absorption of the compound fertilizer. The fertilizer synergist provided by the invention can effectively improve absorption and utilization of crops to compound fertilizers, reduce the usage amount of the compound fertilizers and increase the yield of the crops, and the product provided by the invention has the advantages of easily available raw materials, simple preparation method and convenience in popularization and application.

Description

Technical Field

[0001] The invention belongs to the technical field of fertilizers, and in particular relates to a fertilizer synergist for promoting the absorption of compound fertilizers, and a preparation method and application thereof. Background Art

[0002] Fertilizer enhancers that promote the absorption of compound fertilizers have been widely used and developed. These enhancers effectively improve fertilizer utilization and crop yields by changing the physical properties of fertilizers, affecting nutrient conversion, affecting plant growth, and balancing nutrient absorption. However, despite significant results, the current use of fertilizer enhancers still faces some problems and challenges.

[0003] First of all, from the perspective of the types of synergists, there are mainly chemical synergists, biological synergists, physical synergists and compound synergists on the market. Chemical synergists, such as nitrification inhibitors, can reduce the leaching of nitrogen fertilizers and improve the utilization rate of nitrogen fertilizers. Biological synergists promote crop growth and nutrient absorption by adding microbial agents or plant hormones. Physical synergists prevent fertilizer loss by changing the physical properties of fertilizer particles, such as increasing particle strength. Compound synergists combine macroelements with medium and trace elements to achieve balanced nutrient absorption.

[0004] However, although these enhancers have achieved remarkable results in promoting the absorption of compound fertilizers, there are still some problems. On the one hand, since fertilizer enhancement is a new thing, many people are not very clear about the principle of fertilizer enhancement, which makes it difficult to formulate standards and evaluate the effects of enhancers. On the other hand, there are a large number of enhancer products on the market, but the quality is uneven, and some products even have safety hazards. In addition, the interaction and compatibility between different enhancers also need further research and verification. In terms of biological enhancers, there are currently problems such as the screening, detection and preservation of strains. Many manufacturers do not pay attention to the screening and detection of strains, resulting in a chaotic market for microbial agent products and unclear functional mechanisms. At the same time, the use of enhancers also needs to consider factors such as crop type, growth stage and soil conditions. Different crops have different requirements for nutrients, so it is necessary to select suitable enhancers for specific crops. At the same time, soil conditions will also affect the absorption and utilization of fertilizers, so it is necessary to adjust the use method and dosage of enhancers according to factors such as soil type, pH value, and organic matter content. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes a fertilizer synergist for promoting the absorption of compound fertilizers, and a preparation method and application thereof.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fertilizer synergist for promoting the absorption of compound fertilizers, comprising the following raw materials in parts by weight:

[0008] 1-3 parts of gamma-polyglutamic acid, 0.2-0.5 parts of sodium humate, 3-8 parts of crop straw, 0.5-0.8 parts of biological enzyme, 2-4 parts of amino acid and 1-2 parts of microbial agent.

[0009] Beneficial effects: the γ-polyglutamic acid in the present invention has a strong polarity due to the presence of a large number of carboxyl groups in the molecule, so that it has the functions of retaining water and fertilizer, promoting nutrient absorption and utilization, and regulating crop growth; sodium humate can promote the absorption of water and nutrients by plants, especially when mixed with fertilizers, it can significantly improve fertilizer efficiency and reduce fertilizer dosage, which means that under the same amount of fertilizer, plants can absorb and utilize more nutrients, thereby improving the utilization rate of fertilizers. At the same time, biological enzymes have a strong catalytic effect, which can accelerate the decomposition and transformation of organic matter in fertilizers, and can activate the activity of microorganisms in the soil, increase the beneficial bacteria in the soil, and create a more suitable growth environment for plant roots, thereby promoting the absorption of fertilizers by plants, so that plants can absorb the required nutrients faster; microbial agents can further promote the transformation and value-added of fertilizers through their metabolic activities, and release more nutrients for plant absorption. The microbial agents in the present invention reproduce in large quantities in the soil to form dominant bacteria, and inhibit and reduce the reproduction opportunities of pathogens through competition, parasitism, occupation and other relationships, and provide a healthy growth environment for plant roots. The present invention simultaneously adds microbial agents and biological enzymes to make the decomposition and conversion process of compound fertilizer more efficient, improves the utilization rate of fertilizer, and the two work together to significantly enhance the plant's ability to absorb nutrients in the compound fertilizer, thereby promoting the growth and development of the plant. In addition, the amino acids added in the present invention can chelate with the trace elements in the compound fertilizer and soil, thereby facilitating the plant's absorption and utilization of the trace elements in the compound fertilizer, thereby improving the plant's absorption and utilization efficiency of the compound fertilizer.

[0010] Preferably, the crop straw is one or more of wheat straw, corn straw or rice straw.

[0011] Preferably, the biological enzyme includes one or more of amylolytic enzyme, proteolytic enzyme, and fibrolytic enzyme.

[0012] Preferably, the amino acids include one or more of methionine, asparagine, glutamine, valine, leucine, glycine, alanine, tryptophan, serine, threonine, aspartic acid, and glutamic acid.

[0013] Preferably, the microbial agent includes one or more of Bacillus subtilis, Bacillus gelatinosa, yeast, lactic acid bacteria and nitrogen-fixing bacteria.

[0014] A method for preparing a fertilizer synergist for promoting the absorption of compound fertilizer comprises the following steps:

[0015] The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, which is used to soak crop straws. The soaked crop straws are then dried and crushed, and then evenly mixed with the gamma-polyglutamic acid and sodium humate, and granulated to obtain the fertilizer enhancer for promoting compound fertilizer absorption.

[0016] Preferably, the soaking temperature is 45-60°C and the soaking time is 1-3h.

[0017] Preferably, the mass concentration of γ-polyglutamic acid in the mixed solution is 3-10%.

[0018] Beneficial effects: After the mixed solution of biological enzymes, microbial agents and amino acids is soaked in crop straws, the biological enzymes, microbial agents and amino acids can be effectively adsorbed in the crop straws to achieve a certain slow-release effect. At the same time, the present invention also adds γ-polyglutamic acid, which has a super strong water absorption and water retention capacity and can form a layer of water film in the soil to firmly wrap the fertilizer nutrients. The slow-release effect of γ-polyglutamic acid and crop straws can cooperate to extend the release time of fertilizers and greatly reduce the loss of nutrients. This slow-release effect enables fertilizers to be supplied to plants more persistently, thereby improving the utilization rate of fertilizers. In addition, the use of γ-polyglutamic acid and crop straws can also extend the storage time of fertilizer synergists, providing favorable conditions for maintaining the activity of microbial agents.

[0019] The invention discloses an application of a fertilizer synergist for promoting the absorption of compound fertilizer in the cultivation of Solanaceae plants.

[0020] Preferably, the fertilizer synergist is mixed with the compound fertilizer and then applied, wherein the fertilizer synergist is 1-3wt.% of the mass of the compound fertilizer.

[0021] Preferably, the Solanaceae plant includes one or more of tomato, pepper and eggplant.

[0022] Compared with the prior art, the present invention has the following advantages and technical effects:

[0023] The microbial agent and biological enzyme in the present invention have a certain synergistic effect, which can promote the absorption of fertilizer by plants, so that plants can absorb the required nutrients faster. In addition, γ-polyglutamic acid and crop straw are added as slow-release agents in the present invention to achieve the slow release of compound fertilizer, biological enzyme and microbial agent. At the same time, the two can provide a stable microenvironment for biological enzyme and microbial agent, which is very important for maintaining the activity of biological enzyme and extending its service life. Secondly, the fertilizer synergist provided by the present invention can chelate with trace elements and other components in the fertilizer, thereby further promoting the absorption and utilization of the components in the compound fertilizer by plants. Finally, the raw materials of the product provided by the present invention are easy to obtain, the preparation method is simple, and it is easy to promote and apply. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The embodiment of the invention discloses a fertilizer synergist for promoting the absorption of compound fertilizer, comprising the following raw materials in parts by weight: 1-3 parts of gamma-polyglutamic acid, 0.2-0.5 parts of sodium humate, 3-8 parts of crop straw, 0.5-0.8 parts of biological enzyme, 2-4 parts of amino acid and 1-2 parts of microbial agent.

[0026] In the embodiment of the present invention, γ-polyglutamic acid, also known as natto gum, is a homogeneous polypeptide polymerized by amide bonds at the γ-position with left-handed and right-handed optically active glutamic acid as units; the molecular weight distribution is between 100kDa and 10000kDa. Poly-γ-glutamic acid has excellent water solubility, super strong adsorption and biodegradability; γ-polyglutamic acid molecules contain a large number of carboxyl groups (-COOH), which have strong polarity and can hydrate with water molecules, thus having strong water retention capacity. In the soil, γ-polyglutamic acid can form a layer of water film, which firmly wraps the fertilizer nutrients, prolongs the fertilizer release time, and reduces nutrient loss. At the same time, γ-polyglutamic acid can also improve the exchange capacity of soil cations, gather nutrients in the soil, and further improve the utilization rate of fertilizers. γ-polyglutamic acid has multi-negative properties, which can effectively prevent the combination of sulfate, phosphate, oxalate, carbonate and other ions with calcium ions, magnesium ions and trace elements, and avoid the production of low-soluble salts and precipitation. Therefore, γ-polyglutamic acid can promote the absorption and utilization of trace elements and nutrients such as phosphorus fertilizers, and improve the nutrient utilization rate of crops. As a biostimulant and signal substance, γ-polyglutamic acid can greatly improve the photosynthesis efficiency and stress resistance of plants. It can also upregulate the expression of plant stress resistance-related genes and enhance the resistance of plants. Under adverse conditions such as drought, salinity, and low temperature, γ-polyglutamic acid can significantly increase the content of proline in plants, enhance the enzymatic activity of antioxidant enzymes, and effectively alleviate the damage caused to plants by adverse stress.

[0027] Since γ-polyglutamic acid is highly acidic and sodium humate is weakly alkaline, the metabolism of microorganisms will change the acidity and alkalinity. γ-polyglutamic acid and sodium humate must have a synergistic effect under certain pH conditions (7-8), and the biological enzyme must also be under appropriate pH conditions to exert maximum activity. The present invention creatively adjusts the ratio of γ-polyglutamic acid and sodium humate, as well as the types of biological enzymes and microorganisms, and uses crop straw as a fixed carrier, so that the fertilizer enhancer always remains within the appropriate pH range when it works, thereby producing a synergistic effect.

[0028] In some embodiments of the present invention, the crop straw is one or more of wheat straw, corn straw or rice straw. The function of crop straw is to provide a carbon source for microorganisms on the one hand, and to provide adsorption space for other raw materials by using its own porous structure on the other hand. The type of crop has no significant effect on the synergistic effect of fertilizer. In actual use, any type can be selected and mixed in any proportion. As an example, equal proportions are selected in the following embodiments.

[0029] Preferably, the biological enzyme includes one or more of amylolytic enzyme, proteolytic enzyme, and fibrolytic enzyme.

[0030] Amylase can accelerate the decomposition process of starch in the soil, thereby converting starch into nutrients that can be directly used by plants. In this way, plants can absorb nutrients in fertilizers more fully and improve the absorption and utilization rate of fertilizers. At the same time, monosaccharides such as glucose produced by amylase decomposition can also serve as a source of energy for plants, promoting plant growth and development. Especially during the root growth period, the application of amylase can provide sufficient energy support, promote the growth and development of the root system, and enhance the plant's ability to absorb nutrients in the soil.

[0031] The amino acids produced by proteolytic enzymes in breaking down proteins can be directly absorbed by plants as raw materials for synthesizing new proteins and other biomolecules. Amino acids and peptides can stimulate the growth of plant roots, increase the absorption area and vitality of the roots, and thus improve the plant's ability to absorb water and nutrients. Amino acids and peptides can also promote photosynthesis in plant leaves, increase the chlorophyll content and photosynthetic rate, and thus increase the accumulation of plant organic matter.

[0032] Cellulose is the main component of plant cell walls and an important component of organic matter in the soil. Fiber hydrolases can decompose cellulose and convert it into sugars that can be absorbed and utilized by plants. In this process, fiber hydrolases not only reduce the cellulose content in the soil, but also improve the permeability of the soil, making it easier for oxygen and water to penetrate the soil, which is beneficial to the respiration and water absorption of plant roots. The decomposition products of fiber hydrolases, such as simple sugars such as glucose, are important carbon sources for soil microorganisms. In the process of utilizing these carbon sources, these microorganisms will undergo a series of biochemical reactions to produce organic acids, amino acids, vitamins and other substances, which promote the growth and development of plants. At the same time, the activities of microorganisms can further decompose other organic matter in the soil and release more nutrients for plant absorption. Therefore, fiber hydrolases indirectly enhance the fertility of the soil by promoting microbial activities. The application of fiber hydrolases can also improve the utilization rate of fertilizers. On the one hand, by decomposing cellulose and other non-degradable organic matter, fiber hydrolases increase the nutrient content in the soil that can be absorbed and utilized by plants; on the other hand, fiber hydrolases can also promote the absorption and utilization of other nutrients in the soil by plants, such as phosphorus and potassium. Therefore, under the same amount of fertilizer, plants can obtain more nutrients, thereby improving the utilization rate of fertilizers.

[0033] In some embodiments, the amino acid includes one or more of methionine, asparagine, glutamine, valine, leucine, glycine, alanine, tryptophan, serine, threonine, aspartic acid, and glutamic acid. Amino acids themselves are sources of nitrogen and are a form of organic nitrogen that can be directly absorbed and utilized by crops. When amino acids enter the crop body, they can be synthesized into proteins or form NAD(P)H through biochemical reactions such as the tricarboxylic acid cycle and glycolysis in the plant body, providing energy for the metabolism of substances in the body. This process not only improves the utilization rate of nitrogen, but also promotes the growth and development of crops.

[0034] In some embodiments, the microbial agent includes one or more of Bacillus subtilis, Bacillus gelatinosa, yeast, lactic acid bacteria and nitrogen-fixing bacteria.

[0035] The embodiment of the present invention also discloses a method for preparing a fertilizer synergist for promoting the absorption of compound fertilizer, comprising the following steps:

[0036] The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, which is used to soak crop straws. The soaked crop straws are then dried and crushed, and then evenly mixed with the gamma-polyglutamic acid and sodium humate, and granulated to obtain the fertilizer enhancer for promoting compound fertilizer absorption.

[0037] In a preferred embodiment, the soaking temperature is 45-60° C. and the soaking time is 1-3 hours.

[0038] In a preferred embodiment, the mass concentration of γ-polyglutamic acid in the mixed solution is 3-10%.

[0039] The fertilizer synergist disclosed in the embodiment of the present invention can be used in combination with compound fertilizer to promote the increase of production and efficiency of Solanaceae plants. The fertilizer synergist is mixed with the compound fertilizer and then applied, wherein the addition amount of the fertilizer synergist is 1-3wt.%, and the remainder is the compound fertilizer. The fertilizer synergist of the present invention has an excellent synergistic effect, so it can play a synergistic role at a very small dosage, and can also reduce the dosage of the compound fertilizer, greatly saving agricultural costs.

[0040] Unless otherwise specified, the raw materials in the examples of the present invention were purchased from commercial sources;

[0041] Among them, yeast was purchased from Shandong Runwo Biotechnology Co., Ltd.;

[0042] Lactic acid bacteria were purchased from Weikai Haisi (Shandong) Bioengineering Co., Ltd.;

[0043] Nitrogen-fixing bacteria were purchased from Shanghai Huzheng Biotechnology Co., Ltd.

[0044] γ-Polyglutamic acid was purchased from Shanghai Zhongfeng Biotechnology Co., Ltd.;

[0045] Sodium humate was purchased from Shanghai Ruichu Biotechnology Co., Ltd.

[0046] Unless otherwise specified, the room temperature or normal temperature in the embodiments of the present invention refers to 25±3°C.

[0047] It should be noted that the technical means not described in detail in the embodiments of the present invention can adopt conventional technical means, for example, the drying method can be ordinary air drying or low-temperature drying; for example, the particle size of the crushed particles can be 50-200 mesh, and the conventional stirring method can be adopted during the mixing process. The stirring time, stirring speed, etc. can be adjusted at any time according to the material conditions.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with specific implementation methods.

[0049] Example 1

[0050] A fertilizer synergist for promoting the absorption of compound fertilizers, comprising the following raw materials in parts by weight:

[0051] 2 parts of γ-polyglutamic acid, 0.3 parts of sodium humate, 6 parts of crop straw (wheat straw and corn straw mixed in a mass ratio of 1:1), 0.6 parts of biological enzyme (starch hydrolase, proteolytic enzyme, fiber hydrolase mixed in a mass ratio of 1:1:1), 3 parts of amino acids (methionine, asparagine, glutamine mixed in a mass ratio of 1:1:1) and 1.5 parts of microbial agents (yeast, lactic acid bacteria and nitrogen-fixing bacteria mixed in a mass ratio of 1:1:1).

[0052] A method for preparing a fertilizer synergist for promoting the absorption of compound fertilizer comprises the following steps:

[0053] The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, wherein the mass concentration of the biological enzyme in the mixed solution is 7%, and then the crop straw is soaked in the mixed solution at 55°C for 2 hours, and then the soaked crop straw is dried and crushed to 100 mesh, and then evenly mixed with gamma-polyglutamic acid and sodium humate, and granulated to obtain a fertilizer enhancer for promoting the absorption of compound fertilizer.

[0054] Example 2

[0055] A fertilizer synergist for promoting the absorption of compound fertilizers, comprising the following raw materials in parts by weight:

[0056] 1 part of γ-polyglutamic acid, 0.5 part of sodium humate, 3 parts of crop straw (wheat straw and rice straw mixed in a mass ratio of 1:1), 0.5 part of biological enzyme (starch hydrolase, proteolytic enzyme, fiber hydrolase mixed in a mass ratio of 1:1:1), 4 parts of amino acids (serine, threonine, glutamic acid mixed in a mass ratio of 1:1:1) and 1 part of microbial agent (Bacillus subtilis, lactic acid bacteria and nitrogen-fixing bacteria mixed in a mass ratio of 1:1:1).

[0057] A method for preparing a fertilizer synergist for promoting the absorption of compound fertilizer comprises the following steps:

[0058] The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, wherein the mass concentration of the biological enzyme in the mixed solution is 3-10%, and then the crop straw is soaked in the mixed solution at 45-60°C for 1-3 hours, and then the soaked crop straw is dried and crushed to 100 meshes, and then evenly mixed with gamma-polyglutamic acid and sodium humate, and granulated to obtain a fertilizer enhancer for promoting the absorption of compound fertilizer.

[0059] Example 3

[0060] A fertilizer synergist for promoting the absorption of compound fertilizers, comprising the following raw materials in parts by weight:

[0061] 3 parts of γ-polyglutamic acid, 0.2 parts of sodium humate, 8 parts of crop straw (rice straw and corn straw mixed in a mass ratio of 1:1), 0.8 parts of biological enzyme (proteolytic enzyme and fiber hydrolytic enzyme mixed in a mass ratio of 1:1), 2 parts of amino acids (valine, leucine, and glycine mixed in a mass ratio of 1:1:1) and 2 parts of microbial agent (Bacillus subtilis, Bacillus gelatinus and nitrogen-fixing bacteria mixed in a mass ratio of 1:1:1).

[0062] A method for preparing a fertilizer synergist for promoting the absorption of compound fertilizer comprises the following steps:

[0063] The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, wherein the mass concentration of the biological enzyme in the mixed solution is 3-10%, and then the crop straw is soaked in the mixed solution at 45-60°C for 1-3 hours, and then the soaked crop straw is dried and crushed to 100 meshes, and then evenly mixed with gamma-polyglutamic acid and sodium humate, and granulated to obtain a fertilizer enhancer for promoting the absorption of compound fertilizer.

[0064] Example 4

[0065] A fertilizer synergist for promoting the absorption of compound fertilizers, comprising the following raw materials in parts by weight:

[0066] 1.5 parts of γ-polyglutamic acid, 0.4 parts of sodium humate, 7 parts of crop straw (wheat straw and corn straw mixed in a mass ratio of 1:1), 0.7 parts of biological enzyme (starch hydrolase and fiber hydrolase mixed in a mass ratio of 1:1), 3.5 parts of amino acids (asparagine, leucine, and tryptophan mixed in a mass ratio of 1:1:1) and 1.8 parts of microbial agents (Bacillus subtilis, Bacillus gelatinosa, and yeast mixed in a mass ratio of 1:1:1).

[0067] A method for preparing a fertilizer synergist for promoting the absorption of compound fertilizer comprises the following steps:

[0068] The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, wherein the mass concentration of the biological enzyme in the mixed solution is 3-10%, and then the crop straw is soaked in the mixed solution at 45-60°C for 1-3 hours, and then the soaked crop straw is dried and crushed to 100 meshes, and then evenly mixed with gamma-polyglutamic acid and sodium humate, and granulated to obtain a fertilizer enhancer for promoting the absorption of compound fertilizer.

[0069] Example 5

[0070] A fertilizer synergist for promoting the absorption of compound fertilizers, comprising the following raw materials in parts by weight:

[0071] 2.5 parts of γ-polyglutamic acid, 0.3 parts of sodium humate, 4 parts of crop straw (wheat straw and corn straw mixed in a mass ratio of 1:1), 0.6 parts of biological enzyme (proteolytic enzyme and fiber hydrolytic enzyme mixed in a mass ratio of 1:1), 4 parts of amino acids (valine, alanine and threonine mixed in a mass ratio of 1:1:1) and 1.3 parts of microbial agents (Bacillus gelatinus, yeast and nitrogen-fixing bacteria mixed in a mass ratio of 1:1:1).

[0072] A method for preparing a fertilizer synergist for promoting the absorption of compound fertilizer comprises the following steps:

[0073] The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, wherein the mass concentration of the biological enzyme in the mixed solution is 3-10%, and then the crop straw is soaked in the mixed solution at 45-60°C for 1-3 hours, and then the soaked crop straw is dried and crushed to 100 meshes, and then evenly mixed with gamma-polyglutamic acid and sodium humate, and granulated to obtain a fertilizer enhancer for promoting the absorption of compound fertilizer.

[0074] Comparative Example 1

[0075] A fertilizer synergist, which is different from Example 1 in that no biological enzyme is included. Other raw materials, process steps and parameters are the same as those in Example 1.

[0076] Comparative Example 2

[0077] A fertilizer synergist, which is different from Example 1 in that it does not include amino acids. Other raw materials, process steps and parameters are the same as those in Example 1.

[0078] Comparative Example 3

[0079] A fertilizer synergist, which is different from Example 1 in that it does not include a microbial agent. Other raw materials, process steps and parameters are the same as those in Example 1.

[0080] Comparative Example 4

[0081] A fertilizer synergist, which is different from Example 1 in that it does not include biological enzymes and microbial agents. Other raw materials, process steps and parameters are the same as those in Example 1.

[0082] Comparative Example 5

[0083] A fertilizer synergist, which is different from Example 1 in that crop straw is not included. Other raw materials and addition amounts are the same as those in Example 1.

[0084] A method for preparing a fertilizer synergist comprises the following steps:

[0085] The above raw materials are mixed evenly and then granulated to obtain the fertilizer synergist.

[0086] Comparative Example 6

[0087] A fertilizer synergist, the same as in Example 1.

[0088] A method for preparing a fertilizer synergist comprises the following steps:

[0089] The crop straw is dried and then crushed, and then evenly mixed with gamma-polyglutamic acid, amino acid, sodium humate, crop straw and microbial agent, and granulated to obtain a fertilizer synergist.

[0090] Technical effects:

[0091] 1. The fertilizer synergists obtained in Examples 1-5 and Comparative Examples 1-6 were mixed with compound fertilizers and used for tomato planting, wherein the tomato variety was Century Red Crown, the fertilizer synergist was 2% of the mass of the compound fertilizer, and the compound fertilizer was Stanley compound fertilizer. All were applied as base fertilizers, and conventional water, fertilizer and plant protection management was carried out during the planting period. The blank control group was fertilized with compound fertilizers only without using fertilizer synergists. After the tomatoes matured, the single plant yield and fruit weight of the tomato plants were counted. The results are shown in Table 1, wherein the amount of fertilizer applied is the total amount of compound fertilizer and synergist applied:

[0092] Table 1

[0093]

[0094]

[0095] It can be seen from Table 1 that the fertilizer enhancer obtained by the present invention significantly reduces the amount of compound fertilizer applied, promotes the absorption of nutrients in the compound fertilizer by the fruit, and can greatly increase the yield per plant of tomatoes and the average weight of a single fruit, thereby improving the quality of tomato fruits.

[0096] 2. The fertilizer synergists obtained in Examples 1-5 and Comparative Examples 1-6 were mixed with compound fertilizers and used for eggplant planting, wherein the eggplant variety was Shenqie No. 1 Purple Long Eggplant, the fertilizer synergist was 1% of the mass of the compound fertilizer, and the compound fertilizer was Stanley compound fertilizer. All were applied as base fertilizers, and conventional water, fertilizer and plant protection management was carried out during the planting period. The blank control group was fertilized with compound fertilizers only without using fertilizer synergists. After the tomatoes matured, the single plant yield and fruit weight of the eggplant plants were counted. The results are shown in Table 2, wherein the amount of fertilizer applied is the total amount of compound fertilizer and synergist:

[0097] Table 2

[0098]

[0099]

[0100] It can be seen from Table 1 that the fertilizer synergist obtained by the present invention significantly reduces the amount of compound fertilizer applied, promotes the absorption of nutrients in the compound fertilizer by eggplant fruit, and can greatly increase the per-acre yield of eggplant, effectively reducing the planting cost and income of eggplant. At the same time, it can be seen that the single fruit weight of eggplant in the present invention is also significantly increased compared with the control example, that is, the fertilizer synergist in the present invention can improve the quality of eggplant fruit.

[0101] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A fertilizer synergist for promoting the absorption of compound fertilizer, characterized in that: The invention comprises the following raw materials in parts by weight: 1-3 parts of gamma-polyglutamic acid, 0.2-0.5 parts of sodium humate, 3-8 parts of crop straw, 0.5-0.8 parts of biological enzyme, 2-4 parts of amino acid and 1-2 parts of microbial agent.

2. A fertilizer synergist for promoting compound fertilizer absorption according to claim 1, characterized in that: The crop straw is one or more of wheat straw, corn straw or rice straw.

3. A fertilizer synergist for promoting compound fertilizer absorption according to claim 1, characterized in that: The biological enzyme includes one or more of amylolytic enzyme, proteolytic enzyme and fibrolytic enzyme.

4. A fertilizer synergist for promoting compound fertilizer absorption according to claim 1, characterized in that: The amino acids include one or more of methionine, asparagine, glutamine, valine, leucine, glycine, alanine, tryptophan, serine, threonine, aspartic acid, and glutamic acid.

5. A fertilizer synergist for promoting compound fertilizer absorption according to claim 1, characterized in that: The microbial agent includes one or more of Bacillus subtilis, Bacillus gelatinus, yeast, lactic acid bacteria and nitrogen-fixing bacteria.

6. A method for preparing a fertilizer synergist for promoting compound fertilizer absorption according to any one of claims 1 to 5, characterized in that: The following steps are involved: The biological enzyme, microbial agent and amino acid are dissolved in water to obtain a mixed solution, which is used to soak crop straws. The soaked crop straws are then dried and crushed, and then evenly mixed with the gamma-polyglutamic acid and sodium humate, and granulated to obtain the fertilizer enhancer for promoting compound fertilizer absorption.

7. The method for preparing a fertilizer synergist for promoting compound fertilizer absorption according to claim 6, characterized in that: The soaking temperature is 45-60° C. and the soaking time is 1-3 hours.

8. The method for preparing a fertilizer synergist for promoting compound fertilizer absorption according to claim 6, characterized in that: The mass concentration of γ-polyglutamic acid in the mixed solution is 3-10%.

9. Use of a fertilizer synergist for promoting compound fertilizer absorption as claimed in any one of claims 1 to 5 in the cultivation of Solanaceae plants.

10. The use according to claim 9, characterized in that The fertilizer synergist is mixed with the compound fertilizer and then applied, wherein the fertilizer synergist accounts for 1-3 wt.% of the mass of the compound fertilizer.

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