Fertilizer synergist as well as preparation method and application thereof

Abstract

The invention relates to the technical field of fertilizer synergists, in particular to a fertilizer synergist as well as a preparation method and application thereof. The fertilizer synergist comprises the following raw materials in parts by mass: 30-40 parts of low peat, 10-15 parts of citric acid, 0.5-1 part of a catalyst, 2-5 parts of hydrogen peroxide, 5-10 parts of polysuccinimide and 1-5 parts of a cross-linking agent. The fertilizer can provide necessary nutrient elements for plant growth, can also be used for adjusting the physicochemical properties of soil and enhancing the bioavailability of the nutrient elements of the fertilizer, can well lock effective components after the conventional chemical fertilizer is applied, avoids the rapid loss of the nutrient components, enhances the fertilizer retention and slow release properties, and improves the utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of fertilizer synergists, and in particular to a fertilizer synergist, a preparation method thereof and an application thereof. Background Art

[0002] my country is a major fertilizer producer and user. At present, the fertilizer utilization rate is generally low. With the development of large-scale agriculture in my country, irrational fertilization is common in crop production, which leads to the deterioration of soil physical and chemical properties, and the decline of agricultural product yield, quality and resistance, which greatly restricts the sustainable development of agricultural planting. For example, nitrogen fertilizer is lost in huge amounts through volatilization, leaching and runoff, which leads to the decline of soil fertility, the decline of crop quality and serious environmental pollution. How to control the migration and loss of fertilizer nutrients and improve the soil's ability to retain fertilizer is an urgent problem to be solved.

[0003] Fertilizer enhancers can increase the absorption of nutrients by crops by fixing nitrogen and activating potassium and phosphorus elements that are difficult to utilize in the soil. They can also play a certain regulatory role in the growth of crops. They are usually added to conventional fertilizers to reduce the amount of fertilizer applied and improve the utilization rate of fertilizers.

[0004] Peat is rich in organic matter and trace elements. Compared with chemical fertilizers, peat fertilizer has a slow-release effect, which can continuously provide nutrients to plants, reduce nutrient loss, and thus improve fertilizer utilization. As a natural organic matter, peat does not pollute the environment and has broad application prospects and significant advantages in the agricultural field. However, the existing peat as a fertilizer enhancer has insufficient slow-release properties, which limits its role in extending the fertilizer nutrient release period, resulting in a relatively low fertilizer utilization rate.

[0005] At present, fruit farmers often blindly choose fertilizer types or increase the application amount to increase crop yields in pursuit of maximum benefits. Due to long-term planting and excessive fertilization management, many crop planting areas are facing the problem of declining soil quality. Therefore, it is of great significance to develop a new fertilizer enhancer using peat to improve fertilizer utilization, increase organic matter content, and improve the stress resistance and adaptability of crops. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a fertilizer enhancer and a preparation method and application thereof.

[0007] A fertilizer synergist, whose raw materials include, by weight: 30-40 parts of low-position peat, 10-15 parts of citric acid, 0.5-1 part of a catalyst, 2-5 parts of hydrogen peroxide, 5-10 parts of polysuccinimide, and 1-5 parts of a cross-linking agent.

[0008] Preferably, the particle size of low-lying peat is 0-10 mm and not 0 mm, the moisture content is 50-65%, the pH value is 3.7-5.5, the conductivity is <15 mS / m, the organic matter is >90%, the mass percentage of humic acid content is 15-30%, and the mass percentage of fulvic acid content is 1.0-2.1%.

[0009] Preferably, the catalyst is ferric chloride.

[0010] Preferably, the mass fraction of hydrogen peroxide is 10-16%.

[0011] Preferably, the molecular weight of polysuccinimide is 18,000-20,000.

[0012] Preferably, the crosslinking agent is ethylene glycol diglycidyl ether.

[0013] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Mix low-level peat and citric acid evenly, add water and catalyst thereto, control the temperature to 100°C, stir for 1-2h, cool to room temperature, add hydrogen peroxide and ultrasonically treat for 6-8h, ultrafine grind until it passes through a 1000-mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to sodium hydroxide solution, stir at 30-40°C for 1-2h, adjust the pH value of the system to 4-5, add peat suspension thereto and stir evenly, add cross-linking agent, stir at 50-60°C for 3-6h.

[0014] Preferably, in S1, the ultrasonic treatment frequency is 10-30 kHz, and the ultrasonic temperature is 20-30°C.

[0015] Preferably, in S3, the ultrasonic frequency is 5-15 kHz.

[0016] Preferably, in S2, the concentration of the sodium hydroxide solution is 1-2 mol / L.

[0017] Application of the above fertilizer synergist in fertilizers.

[0018] A fertilizer, whose raw materials include, by mass, 10-30 parts of the above-mentioned fertilizer synergist, 5-15 parts of urea, 1-5 parts of potassium dihydrogen phosphate, 0.1-1 parts of zinc sulfate, 0.1-1 parts of borax, 1-2 parts of sodium hyaluronate, 1-2 parts of L-cysteine ​​ethyl ester hydrochloride, and 0.01-0.1 parts of N-hydroxysuccinimide.

[0019] The preparation method of the above-mentioned fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the above-mentioned fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6-6.5, adding L-cysteine ​​ethyl hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 1-2 hours, and adjusting the pH value of the system to 5-10.

[0020] The application method of the above fertilizer is to directly irrigate the above fertilizer into the soil around the plant roots by soil irrigation after applying conventional chemical fertilizers. The mass ratio of the above fertilizer to conventional chemical fertilizers is 0.5-5:10. Beneficial Effects

[0021] The present invention uses low-level peat as the base material, which not only has large porosity and specific surface area, strong adsorption and anti-biological decomposition capabilities, but also contains rich organic matter and humic acid. It can be compounded with citric acid and, after triple activation, can effectively promote the absorption of trace elements, improve the soil microenvironment, and stimulate soil vitality.

[0022] The present invention formulates macroelements in specific proportions according to the nutritional needs of crops, and adds trace elements such as boron and zinc. It is not only easy to be absorbed and utilized by plants, effectively provides nutrients for crop growth, and effectively improves the utilization rate of fertilizers, but also can improve quality and increase yield, regulate acidity and reduce salt, and has excellent soil improvement effect.

[0023] The peat suspension obtained by the present invention is compounded with polyaspartic acid under the action of a cross-linking agent, and the mutual binding effect is good. By constructing a three-dimensional network structure in the suspension, the overall stability of the fertilizer synergist is effectively improved, and the carboxyl group of sodium hyaluronate reacts with the amino group of L-cysteine ​​ethyl hydrochloride to form a multiple network structure in cooperation with the fertilizer synergist, which can not only limit the release of nutrients and improve the fertilizer utilization rate, but also has good stability. While reducing the amount of agricultural water use, a chelate with biological activity that is easily absorbed by plants is obtained, the absorption efficiency of crops to nutrients is enhanced, the loss of fertilizer is effectively reduced, and the fertilizer synergistic effect is remarkable.

[0024] The invention improves the stability of the synergist and prolongs the period of action. The fertilizer prepared by the invention can not only provide essential nutrients for plant growth, but also be used to adjust the physical and chemical properties of the soil, enhance the biological effectiveness of the nutrients in the fertilizer, and can well lock the effective ingredients after the application of conventional chemical fertilizers to avoid the rapid loss of nutrients, enhance the fertilizer retention and slow release properties, and improve the utilization rate.

[0025] The invention can be widely used in the planting of vegetables, fruits, Chinese herbal medicines and the like in facility agriculture, and can effectively improve the quality of farmland soil and increase the nutrient content in the soil.

[0026] The preparation process of the invention is simple, environmentally friendly, and has low raw material cost. The obtained fertilizer synergist can effectively improve the fertilizer and water retention performance of the soil and greatly increase the soil organic matter content. At the same time, the released substances can continuously provide nutrition for crops and promote crop growth, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a comparison chart of soil organic matter content and total salt content after picking in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0028] Figure 2 This is a comparison chart of the average grain size and average 100-grain weight of Sunshine Rose grapes picked from the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0029] Figure 3 It is a comparison chart of the rotten fruit rate of Sunshine Rose grapes picked from the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0030] Figure 4 This is a comparison of the Sunshine Rose grape bunches picked by the conventional fertilization group and the Example 5 group.

[0031] Figure 5 This is a comparison of single Sunshine Rose grapes picked from the conventional fertilization group and the Example 5 group.

[0032] Figure 4 and Figure 5 Among them, ① is the Example 5 group, and ② is the conventional fertilization group.

[0033] Figure 6 It is a comparison chart of the average stem diameter and average leaf width of cucumbers in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0034] Figure 7 It is a comparison chart of the average plant height and per-acre yield of cucumbers in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0035] Figure 8 It is a comparison chart of the deformed fruit rate and fruit bending angle of cucumbers in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0036] Fig. 9 It is a comparison chart of soil conductivity and organic matter content after cucumber picking in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0037] Fig.10It is a comparison chart of the average stem diameter and average plant height of tomatoes in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0038] Fig.11 It is a comparison chart of the average diameter of tomatoes and the rate of deformed fruits in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0039] Fig.12 It is a comparison chart of the weight and per-acre yield of individual tomatoes in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group.

[0040] Fig.13 It is a comparison chart of soil conductivity and organic matter content after picking tomatoes in the conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group, and Comparative Example 3 group. DETAILED DESCRIPTION

[0041] The present invention will be further explained below in conjunction with specific embodiments.

[0042] Low-lying peat is produced from Satoturpeentie 9227130 EURAJOKI Finland, mined by Kejira, transported to RAUMA Port, Finland, and shipped to Tianjin Port by sea; its particle size is 0-10mm, moisture content is 50-65%, pH value is 3.7-5.5, conductivity is <15mS / m, organic matter is >90%, humic acid is 15-30%, and fulvic acid is 1.0-2.1%. Polysuccinimide was purchased from Hebei Tong Chemical Co., Ltd., and its average molecular weight is 19200. Example 1

[0043] A fertilizer synergist, whose raw materials include: 30kg of low-lying peat, 10kg of citric acid, 500g of ferric chloride, 2kg of hydrogen peroxide with a mass fraction of 10%, 5kg of polysuccinimide, and 1kg of ethylene glycol diglycidyl ether.

[0044] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Add low-level peat and citric acid to a reactor and mix evenly, add 60 kg of water and ferric chloride, control the hydrolysis temperature to 100 ° C, stir at 300 rpm for 1 hour, cool to room temperature, add hydrogen peroxide and ultrasonically treat for 6 hours, the ultrasonic frequency is 10 kHz, the ultrasonic temperature is 20 ° C, and ultrafine grind to pass through a 1000 mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to 30 kg of 1 mol / L sodium hydroxide solution, stir at 30°C for 1 hour at a stirring speed of 100 r / min, adjust the pH value of the system to 4 with 1 mol / L phosphoric acid solution, add peat suspension and stir evenly, add ethylene glycol diglycidyl ether, and stir at 50°C for 3 hours.

[0045] A fertilizer, whose raw materials include: 10 kg of the above-mentioned fertilizer synergist, 5 kg of urea, 1 kg of potassium dihydrogen phosphate, 100 g of zinc sulfate, 100 g of borax, 1 kg of sodium hyaluronate, 1 kg of L-cysteine ​​ethyl ester hydrochloride, and 10 g of N-hydroxysuccinimide.

[0046] The preparation method of the above-mentioned fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6, adding L-cysteine ​​ethyl ester hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 1 hour, the ultrasonic frequency is 5kHz, and adjusting the pH value of the system to 5. Example 2

[0047] A fertilizer synergist, whose raw materials include: 40kg of low-lying peat, 15kg of citric acid, 1kg of ferric chloride, 5kg of hydrogen peroxide with a mass fraction of 16%, 10kg of polysuccinimide, and 5kg of ethylene glycol diglycidyl ether.

[0048] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Add low-level peat and citric acid to a reactor and mix evenly, add 80 kg of water and ferric chloride, control the hydrolysis temperature to 100 ° C, stir at 500 rpm for 2 hours, cool to room temperature, add hydrogen peroxide and ultrasonically treat for 8 hours, the ultrasonic frequency is 30 kHz, the ultrasonic temperature is 30 ° C, and ultrafine grind to pass through a 1000 mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to 60 kg of 2 mol / L sodium hydroxide solution, stir at 40°C for 2 h, with a stirring speed of 500 r / min, adjust the pH value of the system to 5 with 2 mol / L phosphoric acid solution, add peat suspension and stir evenly, add ethylene glycol diglycidyl ether, and stir at 60°C for 6 h.

[0049] A fertilizer, whose raw materials include: 30kg of the above-mentioned fertilizer synergist, 15kg of urea, 5kg of potassium dihydrogen phosphate, 1kg of zinc sulfate, 1kg of borax, 2kg of sodium hyaluronate, 2kg of L-cysteine ​​ethyl ester hydrochloride, and 100g of N-hydroxysuccinimide.

[0050] The preparation method of the above-mentioned fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6.5, adding L-cysteine ​​ethyl ester hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 2 hours, the ultrasonic frequency is 15kHz, and adjusting the pH value of the system to 10. Example 3

[0051] A fertilizer synergist, whose raw materials include: 32kg of low-lying peat, 13kg of citric acid, 600g of ferric chloride, 3kg of hydrogen peroxide with a mass fraction of 15%, 9kg of polysuccinimide, and 2kg of ethylene glycol diglycidyl ether.

[0052] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Add low-level peat and citric acid to a reactor and mix them evenly. Add 65 kg of water and ferric chloride thereto. Control the hydrolysis temperature to 100 ° C. Stir at 350 rpm for 100 min. Cool to room temperature. Add hydrogen peroxide and perform ultrasonic treatment for 7.5 h. The ultrasonic frequency is 12 kHz and the ultrasonic temperature is 23 ° C. Ultrafine grind until it passes through a 1000 mesh sieve to obtain a peat suspension. S2. Add polysuccinimide to 40 kg of 1.8 mol / L sodium hydroxide solution, stir at 33 °C for 100 min, with a stirring speed of 200 r / min, adjust the pH value of the system to 4 with 1.8 mol / L phosphoric acid solution, add peat suspension and stir evenly, add ethylene glycol diglycidyl ether, and stir at 58 °C for 4 h.

[0053] A fertilizer, whose raw materials include: 15 kg of the above-mentioned fertilizer synergist, 12 kg of urea, 2 kg of potassium dihydrogen phosphate, 700 g of zinc sulfate, 200 g of borax, 1.8 kg of sodium hyaluronate, 1.2 kg of L-cysteine ​​ethyl ester hydrochloride, and 70 g of N-hydroxysuccinimide.

[0054] The preparation method of the above-mentioned fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6, adding L-cysteine ​​ethyl hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 100 minutes, the ultrasonic frequency is 6kHz, and adjusting the pH value of the system to 9. Example 4

[0055] A fertilizer synergist, whose raw materials include: 38 kg of low-level peat, 11 kg of citric acid, 800 g of ferric chloride, 4 kg of hydrogen peroxide with a mass fraction of 11%, 7 kg of polysuccinimide, and 4 kg of ethylene glycol diglycidyl ether.

[0056] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Add low-level peat and citric acid to a reactor and mix evenly, add 75 kg of water and ferric chloride, control the hydrolysis temperature to 100 ° C, stir at 450 rpm for 80 min, cool to room temperature, add hydrogen peroxide and ultrasonically treat for 6.5 h, the ultrasonic frequency is 27 kHz, the ultrasonic temperature is 27 ° C, and ultrafine grind to pass through a 1000 mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to 50 kg of 1.2 mol / L sodium hydroxide solution, stir at 37°C for 80 min, and the stirring speed is 400 r / min. Use 1.2 mol / L phosphoric acid solution to adjust the pH value of the system to 5, add peat suspension and stir evenly, add ethylene glycol diglycidyl ether, and stir at 52°C for 5 h.

[0057] A fertilizer, whose raw materials include: 25 kg of the above-mentioned fertilizer synergist, 8 kg of urea, 4 kg of potassium dihydrogen phosphate, 300 g of zinc sulfate, 800 g of borax, 1.2 kg of sodium hyaluronate, 1.8 kg of L-cysteine ​​ethyl ester hydrochloride, and 30 g of N-hydroxysuccinimide.

[0058] The preparation method of the above-mentioned fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6.5, adding L-cysteine ​​ethyl ester hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 80 minutes, the ultrasonic frequency is 12kHz, and adjusting the pH value of the system to 6. Example 5

[0059] A fertilizer synergist, whose raw materials include: 35 kg of low-lying peat, 12 kg of citric acid, 750 g of ferric chloride, 3.5 kg of hydrogen peroxide with a mass fraction of 12%, 8 kg of polysuccinimide, and 3 kg of ethylene glycol diglycidyl ether.

[0060] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Add low-level peat and citric acid to a reactor and mix evenly, add 70 kg of water and ferric chloride, control the hydrolysis temperature to 100 ° C, stir at 400 rpm for 90 min, cool to room temperature, add hydrogen peroxide and ultrasonically treat for 7 h, the ultrasonic frequency is 21 kHz, the ultrasonic temperature is 25 ° C, and ultrafine grind to pass through a 1000 mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to 45 kg of 1.5 mol / L sodium hydroxide solution, stir at 35 °C for 90 min, and the stirring speed is 300 r / min. Use 1.5 mol / L phosphoric acid solution to adjust the pH value of the system to 4.5, add peat suspension and stir evenly, add ethylene glycol diglycidyl ether, and stir at 55 °C for 4.5 h.

[0061] A fertilizer, whose raw materials include: 20 kg of the above-mentioned fertilizer synergist, 10 kg of urea, 3 kg of potassium dihydrogen phosphate, 500 g of zinc sulfate, 500 g of borax, 1.5 kg of sodium hyaluronate, 1.5 kg of L-cysteine ​​ethyl ester hydrochloride, and 50 g of N-hydroxysuccinimide.

[0062] The preparation method of the above-mentioned fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6.3, adding L-cysteine ​​ethyl hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 90 minutes, the ultrasonic frequency is 9kHz, and adjusting the pH value of the system to 7. Comparative Example 1

[0063] A fertilizer synergist, whose raw materials include: 35kg of low-lying peat, 12kg of citric acid, 750g of ferric chloride, 8kg of polysuccinimide, and 3kg of ethylene glycol diglycidyl ether.

[0064] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Add low-level peat and citric acid to a reactor and mix well, add 70 kg of water and ferric chloride, control the hydrolysis temperature to 100 ° C, stir at 400 rpm for 90 min, cool to room temperature, and ultrafine grind to pass through a 1000 mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to 45 kg of 1.5 mol / L sodium hydroxide solution, stir at 35 °C for 90 min, and the stirring speed is 300 r / min. Use 1.5 mol / L phosphoric acid solution to adjust the pH value of the system to 4.5, add peat suspension and stir evenly, add ethylene glycol diglycidyl ether, and stir at 55 °C for 4.5 h.

[0065] A fertilizer, whose raw materials include: 20 kg of the above-mentioned fertilizer synergist, 10 kg of urea, 3 kg of potassium dihydrogen phosphate, 500 g of zinc sulfate, 500 g of borax, 1.5 kg of sodium hyaluronate, 1.5 kg of L-cysteine ​​ethyl ester hydrochloride, and 50 g of N-hydroxysuccinimide.

[0066] The preparation method of the above-mentioned fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6.3, adding L-cysteine ​​ethyl hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 90 minutes, the ultrasonic frequency is 9kHz, and adjusting the pH value of the system to 7. Comparative Example 2

[0067] A fertilizer synergist, whose raw materials include: 35 kg of low-level peat, 12 kg of citric acid, 750 g of ferric chloride, and 3.5 kg of hydrogen peroxide with a mass fraction of 12%.

[0068] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: adding low-level peat and citric acid into a reactor and mixing them evenly, adding 70 kg of water and ferric chloride thereto, controlling the hydrolysis temperature to be 100°C, stirring at 400 rpm for 90 minutes, cooling to room temperature, adding hydrogen peroxide and ultrasonically treating for 7 hours, the ultrasonic frequency being 21 kHz, the ultrasonic temperature being 25°C, and ultrafine grinding until it passes through a 1000-mesh sieve to obtain a peat suspension, i.e., the fertilizer synergist.

[0069] A fertilizer, whose raw materials include: 20 kg of the above-mentioned fertilizer synergist, 10 kg of urea, 3 kg of potassium dihydrogen phosphate, 500 g of zinc sulfate, 500 g of borax, 1.5 kg of sodium hyaluronate, 1.5 kg of L-cysteine ​​ethyl ester hydrochloride, and 50 g of N-hydroxysuccinimide.

[0070] The preparation method of the above-mentioned fertilizer comprises the following steps: adding peat suspension, urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist and mixing them evenly, adjusting the pH value of the system to 6.3, adding L-cysteine ​​ethyl ester hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 90 minutes, the ultrasonic frequency is 9 kHz, and adjusting the pH value of the system to 7. Comparative Example 3

[0071] A fertilizer synergist, whose raw materials include: 35 kg of low-lying peat, 12 kg of citric acid, 750 g of ferric chloride, 3.5 kg of hydrogen peroxide with a mass fraction of 12%, 8 kg of polysuccinimide, and 3 kg of ethylene glycol diglycidyl ether.

[0072] The preparation method of the above-mentioned fertilizer synergist comprises the following steps: S1. Add low-level peat and citric acid to a reactor and mix evenly, add 70 kg of water and ferric chloride, control the hydrolysis temperature to 100 ° C, stir at 400 rpm for 90 min, cool to room temperature, add hydrogen peroxide and ultrasonically treat for 7 h, the ultrasonic frequency is 21 kHz, the ultrasonic temperature is 25 ° C, and ultrafine grind to pass through a 1000 mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to 45 kg of 1.5 mol / L sodium hydroxide solution, stir at 35 °C for 90 min, and the stirring speed is 300 r / min. Use 1.5 mol / L phosphoric acid solution to adjust the pH value of the system to 4.5, add peat suspension and stir evenly, add ethylene glycol diglycidyl ether, and stir at 55 °C for 4.5 h.

[0073] A fertilizer, whose raw materials include: 20 kg of the above-mentioned fertilizer synergist, 10 kg of urea, 3 kg of potassium dihydrogen phosphate, 500 g of zinc sulfate, 500 g of borax, and 1.5 kg of sodium hyaluronate.

[0074] The preparation method of the above fertilizer comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist, mixing evenly, and adjusting the pH value of the system to 7.

[0075] A grape field comparison experiment was conducted in a Sunshine Rose grape plantation in Lulong County, Qinhuangdao City, Hebei Province. Plots with similar geological conditions were randomly divided into conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group and Comparative Example 3 group.

[0076] All groups were subjected to conventional fertilization, while Example 5 Group, Comparative Example 1 Group, Comparative Example 2 Group and Comparative Example 3 Group used soil irrigation after conventional fertilization to irrigate the fertilizers obtained in Example 5, Comparative Example 1, Comparative Example 2 and Comparative Example 3 into the soil around the roots of the plants, respectively. The mass ratio of the above fertilizers to conventional fertilizers was 5:10.

[0077] After picking the Sunshine Rose grapes, soil samples were taken from each group to test the organic matter content and total salt content (measured using a soil moisture rapid tester). Figure 1 As shown, the fertilizers in each test group effectively increased the organic matter content, reduced the total salt content, and improved the physical and chemical properties of the soil, which were better than the conventional fertilization group (P < 0.05); while the organic matter content of Example 5 group was the highest and the total salt content was the lowest, which was better than the comparative examples 1-3 groups (P < 0.05).

[0078] The average grain size, average 100-grain weight and rotten fruit rate of Sunshine Rose grapes picked from each group were compared. Figure 2 and Figure 3 As shown, the average particle size and average 100-grain weight of Example 5 and Comparative Examples 1-3 were greater than those of the conventional fertilization group (P < 0.05), and the rotten fruit rate was lower than that of the conventional fertilization group (P < 0.05); however, the average particle size and average 100-grain weight of Example 5 were the largest, while the rotten fruit rate was the smallest, which was better than that of Comparative Examples 1-3 (P < 0.05).

[0079] The Sunshine Rose grapes obtained in Example 5 were selected and photographed for comparison with the conventional fertilization group. Figure 4 and Figure 5 As shown, the Sunshine Rose grapes obtained in Example 5 have brighter color, smoother skin, uniform fruit size, less cracked fruit and scabs, and a neat appearance.

[0080] A cucumber field comparison experiment was conducted in Xinji Town, Changli County, Qinhuangdao City, Hebei Province. Plots with similar geological conditions were randomly divided into conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group and Comparative Example 3 group.

[0081] Conventional fertilization was performed in each group during the basal fertilizer period, the planting and rooting period, the vine-pulling period, the young fruit period and the picking period. In the Example 5 group, the Comparative Example 1 group, the Comparative Example 2 group and the Comparative Example 3 group, after conventional fertilization in each period, the fertilizers obtained in the Example 5, the Comparative Example 1, the Comparative Example 2 and the Comparative Example 3 were respectively irrigated into the soil around the root system of the plant by soil irrigation, wherein the mass ratio of the fertilizers in each group during the basal fertilizer period to the conventional fertilizer was 5:10, the mass ratio of the fertilizers in each group during the planting and rooting period to the conventional fertilizer was 0.5:10, and the mass ratio of the fertilizers in each group during the vine-pulling period, the young fruit period and the picking period to the conventional fertilizer was 1:10.

[0082] Monitor the growth of cucumbers (such as stem thickness, leaf width, plant height, etc.), monitor the quality and yield of cucumber fruits (such as per-acre yield, deformed fruit rate, fruit bending angle, etc.); monitor the status of cucumber planting soil (such as electrical conductivity, organic matter, etc.).

[0083] like Figure 6-Figure 8 As shown, the growth, quality and yield of cucumbers in each test group were better than those in the conventional fertilization group (P < 0.05); and the growth, quality and yield of cucumbers in Example 5 were the best, better than those in Comparative Examples 1-3 (P < 0.05).

[0084] like Fig. 9 As shown, the fertilizers in each test group effectively increased the organic matter content, reduced the electrical conductivity, and improved the physical and chemical properties of the soil, which were better than the conventional fertilization group (P < 0.05); while the organic matter content of Example 5 group was the highest and the electrical conductivity was the lowest, which was better than the comparative examples 1-3 groups (P < 0.05).

[0085] A tomato field comparison experiment was conducted in the tomato greenhouse production area of ​​Dalu Village, Changli County, Qinhuangdao City, Hebei Province. The variety planted there was fruit tomato Yanyu. However, continuous rainfall in early September and improper use of sheep manure as fertilizer caused large-scale wilting, leaf edge scorch and even death of tomato plants. Plots with similar geological conditions were randomly divided into conventional fertilization group, Example 5 group, Comparative Example 1 group, Comparative Example 2 group and Comparative Example 3 group.

[0086] Each group used commercially available conventional fertilizers, fertilizers obtained in Example 5, Comparative Example 1, Comparative Example 2 and Comparative Example 3, respectively. The conventional fertilization group used commercially available conventional fertilizers according to the instructions. The Example 5 group, Comparative Example 1 group, Comparative Example 2 group and Comparative Example 3 group were fertilized at the following times: September 12 (4.0 kg / mu, drip irrigation), September 21 (2.0 kg / mu, drip irrigation), October 1 (2.0 kg / mu, drip irrigation), October 23 (8.0 kg / mu, drip irrigation), November 17 and thereafter (14.0 kg / mu, drip irrigation, 10 days / times).

[0087] Monitor the growth of tomatoes (such as stem thickness, plant height, etc.), monitor the quality and yield of tomato fruits (such as average diameter, deformed fruit rate, weight of 10 tomatoes, yield per mu, etc.); monitor the status of the soil where tomatoes are planted (such as electrical conductivity, organic matter, etc.).

[0088] like Figure 10-12 As shown, the growth, quality and yield of tomatoes in each test group were better than those in the conventional fertilization group (P < 0.05); and the growth, quality and yield of tomatoes in Example 5 were the best, better than those in Comparative Examples 1-3 (P < 0.05).

[0089] like Fig.13 As shown, the fertilizers in each test group effectively increased the organic matter content, reduced the electrical conductivity, and improved the physical and chemical properties of the soil, which were better than the conventional fertilization group (P < 0.05); while the organic matter content of Example 5 group was the highest and the electrical conductivity was the lowest, which was better than the comparative examples 1-3 groups (P < 0.05).

[0090] The applicant believes that this is because the present invention uses low-level peat as the base material, which not only has a large porosity and specific surface area, strong adsorption and anti-biodegradation capabilities, but also contains rich organic matter and humic acid, which can be compounded with citric acid. After triple activation, it can effectively promote the absorption of trace elements, improve the soil microenvironment, and stimulate soil vitality. The present invention adds a large number of elements in a specific proportion according to the nutritional requirements of crops (especially Sunshine Rose Grapes), and adds boron and zinc trace elements. It is not only easy to be absorbed and utilized by plants, but also effectively provides nutrients for crop growth and effectively improves the utilization rate of fertilizers. At the same time, it can improve quality and increase production, adjust acidity and reduce salt, and has excellent soil improvement effects. The peat suspension obtained by the present invention is compounded with polyaspartic acid under the action of a cross-linking agent, and the mutual binding effect is good. The carboxyl group of sodium hyaluronate reacts with the amino group of L-cysteine ​​ethyl hydrochloride, and cooperates with the action of a fertilizer synergist to form a multiple network structure, which can not only limit the release of nutrients and improve the fertilizer utilization rate, but also has good stability. While reducing the amount of agricultural water use, a chelate with biological activity that is easily absorbed by plants is obtained, the absorption efficiency of crops to nutrients is enhanced, the loss of fertilizer is effectively reduced, and the fertilizer synergistic effect is remarkable.

[0091] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fertilizer synergist, characterized in that: The raw materials include, by mass: 30-40 parts of low-level peat, 10-15 parts of citric acid, 0.5-1 part of catalyst, 2-5 parts of hydrogen peroxide, 5-10 parts of polysuccinimide and 1-5 parts of cross-linking agent.

2. The fertilizer synergist according to claim 1, characterized in that: The particle size of low-lying peat is 0-10mm and not 0mm, the moisture content is 50-65%, the pH value is 3.7-5.5, the conductivity is <15mS / m, the organic matter is >90%, the mass percentage of humic acid content is 15-30%, and the mass percentage of fulvic acid content is 1.0-2.1%.

3. The fertilizer synergist according to claim 1, characterized in that: The crosslinking agent is ethylene glycol diglycidyl ether.

4. A method for preparing the fertilizer synergist according to any one of claims 1 to 3, characterized in that: The steps include: S1. Mix low-level peat and citric acid evenly, add water and catalyst thereto, control the temperature to 100°C, stir for 1-2h, cool to room temperature, add hydrogen peroxide and ultrasonically treat for 6-8h, ultrafine grind until it passes through a 1000-mesh sieve to obtain a peat suspension; S2. Add polysuccinimide to sodium hydroxide solution, stir at 30-40°C for 1-2h, adjust the pH value of the system to 4-5, add peat suspension thereto and stir evenly, add cross-linking agent, stir at 50-60°C for 3-6h.

5. The method for preparing the fertilizer synergist according to claim 4, characterized in that: In S1, the ultrasonic treatment frequency is 10-30 kHz and the ultrasonic temperature is 20-30°C; in S3, the ultrasonic frequency is 5-15 kHz.

6. The method for preparing the fertilizer synergist according to claim 4, characterized in that: In S2, the concentration of the sodium hydroxide solution is 1-2 mol / L.

7. Use of the fertilizer synergist according to any one of claims 1 to 3 in fertilizers.

8. A fertilizer, characterized in that The raw materials include, by mass: 10-30 parts of the fertilizer synergist as described in any one of claims 1 to 3, 5-15 parts of urea, 1-5 parts of potassium dihydrogen phosphate, 0.1-1 parts of zinc sulfate, 0.1-1 parts of borax, 1-2 parts of sodium hyaluronate, 1-2 parts of L-cysteine ​​ethyl ester hydrochloride, and 0.01-0.1 parts of N-hydroxysuccinimide.

9. A method for preparing the fertilizer as claimed in claim 8, characterized in that: The method comprises the following steps: adding urea, potassium dihydrogen phosphate, zinc sulfate, borax and sodium hyaluronate to the fertilizer synergist according to any one of claims 1 to 3, mixing evenly, adjusting the pH value of the system to 6-6.5, adding L-cysteine ​​ethyl hydrochloride and N-hydroxysuccinimide thereto, ultrasonically treating for 1-2 hours, and adjusting the pH value of the system to 5-10.

10. A method for applying the fertilizer according to claim 8, characterized in that: After applying conventional fertilizers, the fertilizer as claimed in claim 8 is directly poured into the soil around the roots of the plants by soil irrigation, and the mass ratio of the fertilizer as claimed in claim 8 to conventional fertilizers is 0.5-5:10.

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