Special fertilizer for high-sugar peanuts and preparation method thereof

Abstract

The invention discloses a special fertilizer for high-sugar peanuts and a preparation method thereof, and belongs to the technical field of fertilizers. The special fertilizer for the high-sugar peanuts is prepared from the following raw materials: 20 to 30 parts of urea, 15 to 20 parts of calcium superphosphate, 10 to 15 parts of monopotassium phosphate, 10 to 15 parts of potassium sulfate, 20 to 30 parts of corn straw, 15 to 20 parts of animal waste, 10 to 15 parts of waste molasses, 5 to 8 parts of microelement chelate, 3 to 5 parts of sugarcane leaf extract, 2 to 4 parts of complex microbial inoculants and 0.1 to 0.2 part of abscisic acid. The trace element chelate is a chelate of zinc, manganese, boron, molybdenum and EDTA (Ethylene Diamine Tetraacetic Acid). The components cooperate with one another, so that the sucrose content and the total sugar content of the high-sugar peanuts can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizers, in particular to a special fertilizer for high-sugar peanuts and a preparation method thereof. Background Art

[0002] As an important economic crop, peanuts are widely grown around the world. With the growing demand for healthy food among consumers, high-sugar peanuts are favored by the market for their unique taste and nutritional value. There is no clear standard for high-sugar peanuts. During variety approval, peanuts with a sugar content higher than 5.8% are identified as high-sugar varieties. However, in the traditional peanut planting process, due to improper fertilizer types and fertilization methods, the sugar content of peanuts is often insufficient, which affects the quality and commodity value of peanuts.

[0003] During the growth of peanuts, the accumulation of sugars is a complex process, which is affected by many factors, including genetic control of peanuts, soil fertility, climatic conditions, fertilizer types and fertilization strategies.

[0004] However, most peanut fertilizers on the market are general-purpose, lacking special fertilizers for high-sugar peanuts. These general-purpose fertilizers often cannot meet the growth needs of high-sugar peanuts in terms of nutrient ratio, organic matter content, and plant physiological regulators, resulting in limited improvement in the sugar content of peanuts. Summary of the invention

[0005] The purpose of the present invention is to provide a special fertilizer for high-sugar peanuts and a preparation method thereof, so as to solve the problems existing in the above-mentioned prior art.

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

[0007] One of the technical solutions of the present invention is a special fertilizer for high-sugar peanuts, wherein the raw materials include the following components by weight: 20-30 parts of urea, 15-20 parts of superphosphate, 10-15 parts of potassium dihydrogen phosphate, 10-15 parts of potassium sulfate, 20-30 parts of corn stalks, 15-20 parts of animal feces, 10-15 parts of waste molasses, 5-8 parts of trace element chelates, 3-5 parts of sugarcane leaf extract, 2-4 parts of composite bacterial agent, and 0.1-0.2 parts of abscisic acid; the trace element chelate is a chelate of zinc, manganese, boron, molybdenum and EDTA (ethylenediaminetetraacetic acid).

[0008] In the present invention, the careful proportion of inorganic fertilizers (urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate) can provide the macronutrient nitrogen, phosphorus, and potassium required for the growth of high-sugar peanuts, providing a solid foundation for the healthy growth and sugar accumulation of high-sugar peanuts, and the sulfur fertilizer therein can not only improve the utilization rate of high-sugar peanuts for macronutrients such as nitrogen, phosphorus, and potassium, but also promote the transportation process of sugar in high-sugar peanuts, so that more sugar can be accumulated in high-sugar peanut fruits. Organic fertilizers (corn stalks, animal manure, and waste molasses) are rich in organic matter and trace elements, which can improve soil structure, increase soil fertility, and provide comprehensive nutritional support for high-sugar peanuts. Waste molasses and sugarcane leaf extracts, as sugar-containing substances, directly provide a source of sugar for high-sugar peanuts and promote the accumulation of sugar in high-sugar peanuts. Moreover, the sucrose contained in the waste molasses can also increase the activity of sucrose synthase, a key enzyme in sucrose metabolism, and promote the accumulation of sucrose in high-sugar peanuts. Trace element chelates (chelates of zinc, manganese, boron, molybdenum and EDTA) can effectively supplement the trace elements required for the growth of high-sugar peanuts, and these trace elements play a key role in the synthesis and transportation of sugars. The composite bacterial agent can improve the soil microecological environment, promote the growth and reproduction of beneficial microorganisms, thereby improving soil fertility and the absorption capacity of the roots of high-sugar peanuts. Abscisic acid can regulate the metabolic process in high-sugar peanuts, especially it can increase the activity of sucrose synthase, a key enzyme in sucrose metabolism, and can effectively increase the sucrose content and total sugar content of high-sugar peanuts. In summary, the special fertilizer for high-sugar peanuts of the present invention acts on the growth process of high-sugar peanuts through multiple mechanisms such as providing comprehensive nutritional support, promoting the accumulation of sugars, supplementing trace elements, and regulating bioactive substances, thereby significantly increasing the sucrose content and total sugar content of high-sugar peanuts.

[0009] Furthermore, the preparation steps of the trace element chelate include: mixing EDTA, sodium hydroxide and water, stirring until completely dissolved, adding manganese sulfate, zinc sulfate, boric acid and ammonium molybdate, heating to carry out chelation reaction, filtering, concentrating and drying after the reaction is completed to obtain the trace element chelate.

[0010] Zinc can participate in photosynthesis and sugar metabolism, manganese is a cofactor of many enzymes, boron helps transport and distribute sugar, and molybdenum is related to nitrogen fixation and sugar metabolism in high-sugar peanuts. The synergistic effect of manganese, zinc, boron, and molybdenum in trace element chelates can effectively increase the sucrose content and total sugar content of high-sugar peanuts. The chelation of EDTA increases the bioavailability of these trace elements, making them easier to be absorbed and utilized by high-sugar peanuts. In addition, EDTA has an activating effect on the activity of sucrose synthase, which is beneficial to promote the accumulation of sucrose in high-sugar peanuts.

[0011] Furthermore, the temperature of the chelating reaction is 70-80°C and the time is 2-4h; the dosage ratio of the EDTA, sodium hydroxide, water, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate is 1mol:0.4-0.6mol:400-500mL:0.2-0.3mol:0.1-0.2mol:0.2-0.3mol:0.1-0.2mol.

[0012] Furthermore, the preparation steps of the sugarcane leaf extract include: crushing the sugarcane leaves to obtain sugarcane leaf powder; mixing the sugarcane leaf powder with water, then adding cellulase, extracting for 2-4 hours under ultrasonic-assisted conditions, and then concentrating and drying to obtain the sugarcane leaf extract.

[0013] Sugarcane is a plant with a very high sugar content. It contains some active substances that promote sugar accumulation. The sugarcane leaf extract obtained by the above method may contain some of these active substances, which can promote the conversion of photosynthesis products into sugar by regulating the metabolic pathways in high-sugar peanuts, thereby increasing the content of sucrose and total sugar.

[0014] Furthermore, the mass ratio of the sugarcane leaf powder to water is 1:6-8; and the power of the ultrasonic wave is 200-400W.

[0015] Furthermore, the composite bacterial agent includes Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis and Rhizocystis endoradiata.

[0016] The combination of Trichoderma harzianum and organic fertilizer can improve the soil aggregate structure, alleviate the degree of soil compaction and eliminate soil toxic substances, accelerate the growth of soil organic matter, and increase and maintain the moisture and air in the soil. As a phosphate-dissolving bacterium, Bacillus megaterium can secrete organic acids and other substances to dissolve the ineffective phosphorus in the soil and convert it into phosphorus that can be used by high-sugar peanuts; the polysaccharides it secretes can improve the soil aggregate structure, increase the excellent physical properties of the soil, regulate the metabolic pathways in high-sugar peanuts, promote the process of photosynthesis products into sugars, and improve the effective utilization of nutrients in the soil, and promote root growth and nutrient absorption. Bacillus subtilis can stimulate the growth of the root system of high-sugar peanuts, increase the number and vitality of the root system, which helps high-sugar peanuts better absorb water and nutrients in the soil and provide sufficient nutritional support for their growth and development. The extraradical hyphae of Rhizosporium endoradicis has strong penetration and absorption ability, which can help high-sugar peanuts absorb nutrients, and also play an important role in improving the stress resistance of high-sugar peanuts, improving soil structure, and microbial community structure. The combined use of the above-mentioned fungal agents can effectively increase the sucrose content and total sugar content of high-sugar peanuts through the synergistic effects of multiple mechanisms such as improving the soil environment, changing the properties of nutrients, promoting nutrient absorption, and regulating metabolic pathways.

[0017] Furthermore, in terms of mass ratio, the ratio of Trichoderma harzianum: Bacillus megaterium: Bacillus subtilis: Rhizospora endoradicata=2-3:1-2:1-2:2-3.

[0018] Furthermore, the animal excrement is sheep excrement.

[0019] The second technical solution of the present invention: the preparation method of the above-mentioned high-sugar peanut special fertilizer comprises the following steps: crushing corn stalks and mixing them with animal feces, adding water to a water content of 50-60wt%, then adding a composite bacterial agent, mixing them evenly and then stacking and fermenting them, adding waste molasses after fermentation for 10-15 days, mixing them evenly and then stacking and fermenting them for 5-10 days, and drying and crushing the fermented material after the fermentation is completed to obtain fermentation dry material;

[0020] The fermented dry material is mixed with urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate, trace element chelate, sugarcane leaf extract and abscisic acid, and a binder is added for granulation to obtain the special fertilizer for high-sugar peanuts.

[0021] Fermenting corn stalks and animal manure for a period of time and then adding waste molasses for mixed fermentation can retain part of the sucrose in the waste molasses, thereby playing a role in increasing the activity of sucrose synthase.

[0022] Furthermore, the binder is a sodium carboxymethyl cellulose aqueous solution.

[0023] Furthermore, the concentration of the sodium carboxymethyl cellulose aqueous solution is 3-5wt%; and the amount of the sodium carboxymethyl cellulose aqueous solution added is 5-10wt% of the mixture.

[0024] The third technical solution of the present invention: Application of the above-mentioned special fertilizer for high-sugar peanuts in the cultivation of high-sugar peanuts, wherein the special fertilizer for high-sugar peanuts is applied as a base fertilizer for the cultivation of high-sugar peanuts, and the application amount is 40-60 kg / mu.

[0025] The present invention discloses the following technical effects:

[0026] The invention provides a special fertilizer for high-sugar peanuts, the raw materials of which include: 20-30 parts of urea, 15-20 parts of superphosphate, 10-15 parts of potassium dihydrogen phosphate, 10-15 parts of potassium sulfate, 20-30 parts of corn stalks, 15-20 parts of animal feces, 10-15 parts of waste molasses, 5-8 parts of trace element chelates, 3-5 parts of sugarcane leaf extract, 2-4 parts of composite bacterial agent, and 0.1-0.2 parts of abscisic acid; the trace element chelate is a chelate of zinc, manganese, boron, molybdenum and EDTA. The above components cooperate synergistically to effectively increase the sucrose content and total sugar content of high-sugar peanuts. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0028] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0029] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0030] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present application description and examples are exemplary only.

[0031] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0032] Peanuts are an important oil crop in my country and occupy an important position in the world. More than 50% of peanuts in China are used in oil crops. As people pay more attention to its nutritional value and taste, the way of eating it has also become more diverse, especially high-sugar sweet peanuts have become more and more popular among consumers, showing a huge market space. The sweetness of peanuts is mainly composed of sucrose, and its genetic traits are dominated by major effect genes. Tang Yueyi et al. analyzed the sweetness quality of peanut kernels. The results showed that when the sucrose content in the kernels was greater than 5%, the taste was better, and the correlation of its flavor quality reached 0.88. Tharanathan et al.'s research showed that peanut kernels contain soluble sugars such as sucrose, marshmallows, fructose and verbascose. Soluble sugars are the products of photosynthesis in higher plants. They can not only regulate metabolism, but also promote plant growth. Rathinasabapathi believes that increasing the content of soluble sugars can enhance the salt tolerance, drought resistance and cold resistance of plants. Sucrose plays an important role in soluble sugars and regulates plant sugar metabolism. Sucrose is the main factor affecting the taste of peanuts and their products, and is an important reference indicator for evaluating peanut flavor and preference.

[0033] The sugar metabolism mechanism of peanut kernels is complex. Pattee et al. analyzed 20 carbohydrates (sucrose, glucose, etc.) of 52 different varieties of peanuts and found that 9 were caused by the environment, 5 were different types, and 11 were caused by the interaction between genotype and environment. Wang Xiuzhen et al. determined the sucrose and soluble total sugar between peanut kernels and proved from another perspective that the main source of soluble sugar in peanuts is incomplete conversion into storage substances. Isleib et al. studied their hybridization and offspring. The results showed that the soluble sugar content of peanut kernels was most affected by additive genetic effects, and there was a significant difference in sucrose content during orthogonal and reciprocal crosses. Li Anni et al. divided the pod development into three periods from the perspective of morphology and organic matter composition: pod expansion period (23-40 days after flowering), seed filling period (30-65 days), and maturity period (about 65-85 days after flowering). As peanuts mature, the sucrose content of each variety also changes to a certain extent. Zhonghua No. 6 decreases with the growth of seeds, while Zhonghua No. 12 first decreases and then rises slightly, and the high oleic acid line XH13 shows a trend of decreasing, increasing, and decreasing. Tang Zhaoxiu et al. analyzed the influence of sucrose accumulation on Fuhua No. 4. The results showed that with the accumulation of dry matter, the sucrose content curve showed a change pattern of first high, then low, and then rising again. The above research shows that the sugar content of peanut kernels is mainly affected by the peanut variety.

[0034] In addition to variety factors, the sugar content of peanuts is also related to factors such as kernel maturity, soil, cultivation measures and altitude, which may promote or reduce the accumulation of sugars such as sucrose by affecting the activity of related enzymes. Studies on other crops have shown that sucrose synthase and sucrose phosphate synthase are the main enzymes that catalyze sucrose synthesis. Sucrose synthase is a glycosyltransferase widely present in plants. It can catalyze both sucrose synthesis and sucrose decomposition. It is one of the key enzymes required for the photosynthetic product sucrose in leaves to enter various metabolic pathways and plays a vital role in the growth and development of plants. Invertases include acid invertase and neutral invertase, which irreversibly catalyze the hydrolysis of sucrose into glucose and fructose. However, the relationship between these enzymes and the sugar content of peanut kernels has not been reported.

[0035] In the prior art, most methods of increasing the sugar content of peanuts are through breeding of improved varieties or regulating cultivation measures, but the breeding cycle of improved varieties is long and the cost is high, while regulating cultivation measures are difficult to operate and have little effect. If a fertilizer that can increase the sugar content of peanuts can be developed, especially a fertilizer that can further increase the sugar content of high-sugar peanuts, it will not only be simple to operate but also low in cost, and will have great development prospects.

[0036] As a first aspect of the present invention, the present invention provides a special fertilizer for high-sugar peanuts. The raw materials include the following components by mass: 20-30 parts of urea, 15-20 parts of superphosphate, 10-15 parts of potassium dihydrogen phosphate, 10-15 parts of potassium sulfate, 20-30 parts of corn stalks, 15-20 parts of animal manure, 10-15 parts of waste molasses, 5-8 parts of trace element chelates, 3-5 parts of sugarcane leaf extract, 2-4 parts of composite bacterial agent, and 0.1-0.2 parts of abscisic acid; the trace element chelate is a chelate of zinc, manganese, boron, molybdenum and EDTA (ethylenediaminetetraacetic acid).

[0037] As a preferred embodiment of the present invention, the preparation steps of the trace element chelate include: mixing EDTA, sodium hydroxide and water, stirring until completely dissolved, adding manganese sulfate, zinc sulfate, boric acid and ammonium molybdate, heating to carry out a chelation reaction, filtering, concentrating and drying after the reaction is completed to obtain the trace element chelate.

[0038] As a preferred embodiment of the present invention, the temperature of the chelating reaction is 70-80°C and the time is 2-4h; the dosage ratio of the EDTA, sodium hydroxide, water, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate is 1mol:0.4-0.6mol:400-500mL:0.2-0.3mol:0.1-0.2mol:0.2-0.3mol:0.1-0.2mol.

[0039] As a preferred embodiment of the present invention, the preparation steps of the sugarcane leaf extract include: crushing the sugarcane leaves to obtain sugarcane leaf powder; mixing the sugarcane leaf powder with water, then adding cellulase, extracting for 2-4 hours under ultrasonic-assisted conditions, and then concentrating and drying to obtain the sugarcane leaf extract.

[0040] As a preferred embodiment of the present invention, the mass ratio of the sugarcane leaf powder to water is 1:6-8; and the power of the ultrasonic wave is 200-400W.

[0041] As a preferred embodiment of the present invention, the composite bacterial agent includes Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis and Rhizocystis endoradiata.

[0042] As a preferred embodiment of the present invention, the mass ratio of Trichoderma harzianum: Bacillus megaterium: Bacillus subtilis: Rhizospora endoradicata=2-3:1-2:1-2:2-3.

[0043] As a preferred embodiment of the present invention, the animal feces is sheep feces.

[0044] As a second aspect of the present invention, the present invention provides a method for preparing the above-mentioned high-sugar peanut fertilizer, comprising the following steps: crushing corn stalks and mixing them with animal feces, adding water to a water content of 50-60wt%, then adding a composite bacterial agent, mixing them evenly and then stacking and fermenting them, adding waste molasses after fermentation for 10-15 days, mixing them evenly and then continuing to stack and ferment for 5-10 days, and after the fermentation is completed, drying and crushing the fermented material to obtain fermentation dry material;

[0045] The fermented dry material is mixed with urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate, trace element chelate, sugarcane leaf extract and abscisic acid, and a binder is added for granulation to obtain the special fertilizer for high-sugar peanuts.

[0046] As a preferred embodiment of the present invention, the binder is a sodium carboxymethyl cellulose aqueous solution.

[0047] As a preferred embodiment of the present invention, the concentration of the sodium carboxymethyl cellulose aqueous solution is 3-5wt%; the amount of the sodium carboxymethyl cellulose aqueous solution added is 5-10wt% of the mixture.

[0048] As a third aspect of the present invention, the present invention provides the use of the above-mentioned special fertilizer for high-sugar peanuts in the planting of high-sugar peanuts, wherein the special fertilizer for high-sugar peanuts is applied as a base fertilizer for the planting of high-sugar peanuts, and the application amount is 40-60 kg / mu.

[0049] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0050] The reagents and raw materials (including various bacterial agents) used in the following examples, comparative examples and effect verifications can be obtained from commercial sources unless otherwise specified. Among them, the effective viable count of Trichoderma harzianum is 100 million / g, the effective viable count of Bacillus megaterium is 500 million / g, the effective viable count of Bacillus subtilis is 200 million / g, the effective viable spore content of Rhizosporium endoradici is 50 / g, and the effective viable count of Bacillus licheniformis is 500 million / g. Waste molasses is a residual liquid produced during the sucrose processing process, purchased from Shandong Zhelong Biotechnology Co., Ltd.

[0051] The room temperature involved in the following examples, comparative examples and effect verification specifically refers to 20-30°C.

[0052] Example 1

[0053] A special fertilizer for high-sugar peanuts, whose raw materials are composed of the following by mass: 20 parts of urea, 15 parts of superphosphate, 10 parts of potassium dihydrogen phosphate, 10 parts of potassium sulfate, 20 parts of corn stalks, 15 parts of animal manure, 10 parts of waste molasses, 5 parts of trace element chelate, 3 parts of sugarcane leaf extract, 2 parts of compound bacterial agent, and 0.1 part of abscisic acid.

[0054] The preparation steps of the above-mentioned high-sugar peanut fertilizer are as follows:

[0055] The corn stalks are crushed and mixed with animal feces (dry sheep feces), water is added to a water content of 50wt%, and then a composite bacterial agent (mixed by Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis and Rhizocystis endoradici in a mass ratio of 2:1:1:2) is added, mixed evenly and then piled for fermentation, and after fermentation for 10 days, molasses is added, mixed evenly and then piled for fermentation for 5 days, and after the fermentation is completed, the fermented material is dried and crushed to obtain a fermentation dry material;

[0056] The fermented dry material is mixed with urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate, trace element chelate, sugarcane leaf extract and abscisic acid, and a binder (a sodium carboxymethyl cellulose aqueous solution with a concentration of 3wt%, the added amount of which is 5wt% of the mixture) is added for granulation, and then dried to obtain a special fertilizer for high-sugar peanuts.

[0057] The preparation method of the trace element chelate is as follows: EDTA, sodium hydroxide and water are mixed, stirred until completely dissolved, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate are added (the dosage ratio of EDTA, sodium hydroxide, water, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate is 1 mol: 0.4 mol: 400 mL: 0.2 mol: 0.1 mol: 0.2 mol: 0.1 mol), heated at 70° C. for chelation reaction for 2 h, filtered, concentrated and dried after the reaction to obtain the trace element chelate;

[0058] The preparation method of sugarcane leaf extract is as follows: crush the sugarcane leaves, pass through a 40-mesh sieve, and obtain sugarcane leaf powder; mix the sugarcane leaf powder with water in a mass ratio of 1:6, extract for 2 hours under ultrasonic (power of 200W) assisted conditions at room temperature, and then concentrate and dry to obtain the sugarcane leaf extract.

[0059] Example 2

[0060] A special fertilizer for high-sugar peanuts, whose raw materials are composed of the following by mass: 25 parts of urea, 18 parts of superphosphate, 12 parts of potassium dihydrogen phosphate, 12 parts of potassium sulfate, 25 parts of corn stalks, 18 parts of animal manure, 12 parts of waste molasses, 6 parts of trace element chelate, 4 parts of sugarcane leaf extract, 3 parts of compound bacterial agent, and 0.15 parts of abscisic acid.

[0061] The preparation steps of the above-mentioned high-sugar peanut fertilizer are as follows:

[0062] The corn stalks are crushed and mixed with animal feces (dry sheep feces), water is added to a water content of 55wt%, and then a composite bacterial agent (mixed by Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis and Rhizocystis endoradici in a mass ratio of 3:2:1:3) is added, mixed evenly and then piled for fermentation, and after fermentation for 12 days, molasses is added, mixed evenly and then piled for fermentation for 8 days, and after the fermentation is completed, the fermented material is dried and crushed to obtain a fermentation dry material;

[0063] The fermented dry material is mixed with urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate, trace element chelate, sugarcane leaf extract and abscisic acid, and a binder (a sodium carboxymethyl cellulose aqueous solution with a concentration of 4wt%, added in an amount of 8wt% of the mixture) is added for granulation, and then dried to obtain a special fertilizer for high-sugar peanuts.

[0064] The preparation method of the trace element chelate is as follows: EDTA, sodium hydroxide and water are mixed, stirred until completely dissolved, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate are added (the dosage ratio of EDTA, sodium hydroxide, water, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate is 1 mol: 0.5 mol: 450 mL: 0.2 mol: 0.2 mol: 0.3 mol: 0.2 mol), heated at 75° C. for chelation reaction for 3 h, filtered, concentrated and dried after the reaction to obtain the trace element chelate;

[0065] The preparation method of sugarcane leaf extract is as follows: crush the sugarcane leaves, pass through a 40-mesh sieve, and obtain sugarcane leaf powder; mix the sugarcane leaf powder with water in a mass ratio of 1:7, extract for 3 hours at room temperature under ultrasonic (power of 300W) auxiliary conditions, and then concentrate and dry to obtain the sugarcane leaf extract.

[0066] Example 3

[0067] A special fertilizer for high-sugar peanuts, whose raw materials are composed of the following by mass: 30 parts of urea, 20 parts of superphosphate, 15 parts of potassium dihydrogen phosphate, 15 parts of potassium sulfate, 30 parts of corn stalks, 20 parts of animal manure, 15 parts of waste molasses, 8 parts of trace element chelates, 5 parts of sugarcane leaf extract, 4 parts of compound bacterial agent, and 0.2 parts of abscisic acid.

[0068] The preparation steps of the above-mentioned high-sugar peanut fertilizer are as follows:

[0069] The corn stalks are crushed and mixed with animal feces (dry sheep feces), water is added to a water content of 60wt%, and then a composite bacterial agent (mixed by Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis and Rhizocystis endoradici in a mass ratio of 3:2:2:3) is added, mixed evenly and then piled for fermentation, and after fermentation for 15 days, molasses is added, mixed evenly and then piled for fermentation for 10 days, and after the fermentation is completed, the fermented material is dried and crushed to obtain a fermentation dry material;

[0070] The fermented dry material is mixed with urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate, trace element chelate, sugarcane leaf extract and abscisic acid, and a binder (a sodium carboxymethyl cellulose aqueous solution with a concentration of 5wt%, the added amount of which is 10wt% of the mixture) is added for granulation, and then dried to obtain a special fertilizer for high-sugar peanuts.

[0071] The preparation method of the trace element chelate is as follows: EDTA, sodium hydroxide and water are mixed, stirred until completely dissolved, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate are added (the dosage ratio of EDTA, sodium hydroxide, water, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate is 1 mol: 0.6 mol: 500 mL: 0.3 mol: 0.2 mol: 0.3 mol: 0.2 mol), heated at 80° C. for chelation reaction for 4 h, filtered, concentrated and dried after the reaction to obtain the trace element chelate;

[0072] The preparation method of sugarcane leaf extract is as follows: crush the sugarcane leaves, pass through a 40-mesh sieve, and obtain sugarcane leaf powder; mix the sugarcane leaf powder with water in a mass ratio of 1:8, extract for 4 hours at room temperature under ultrasonic (power of 400W) auxiliary conditions, and then concentrate and dry to obtain the sugarcane leaf extract.

[0073] Comparative Example 1

[0074] Same as Example 1, except that potassium sulfate is replaced by an equal mass of potassium chloride.

[0075] Comparative Example 2

[0076] The same as Example 1, except that the use of abscisic acid is omitted.

[0077] Comparative Example 3

[0078] The same as Example 1, except that the preparation method of the trace element chelate is: EDTA, sodium hydroxide and water are mixed, stirred until completely dissolved, manganese sulfate, boric acid and ammonium molybdate are added (the amount ratio of EDTA, sodium hydroxide, water, manganese sulfate, boric acid and ammonium molybdate is 1 mol: 0.4 mol: 400 mL: 0.3 mol: 0.2 mol: 0.1 mol), heated at 70° C. for chelation reaction for 2 h, and after the reaction is completed, filtered, concentrated and dried to obtain the trace element chelate.

[0079] Comparative Example 4

[0080] The same as Example 1, except that the preparation method of the trace element chelate is: mixing an amino acid (methionine), sodium hydroxide and water, stirring until completely dissolved, adding manganese sulfate, zinc sulfate, boric acid and ammonium molybdate (the amount ratio of amino acid, sodium hydroxide, water, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate is 1 mol: 0.4 mol: 400 mL: 0.2 mol: 0.1 mol: 0.2 mol: 0.1 mol), heating at 70° C. for chelation reaction for 2 h, filtering, concentrating and drying after the reaction to obtain the trace element chelate.

[0081] Comparative Example 5

[0082] Same as Example 1, except that the use of sugarcane leaf extract is omitted.

[0083] Comparative Example 6

[0084] The same as Example 1, except that the composite bacterial agent is mixed with Trichoderma harzianum, Bacillus licheniformis, Bacillus subtilis and Rhizocystis endoradici in a mass ratio of 2:1:1:2.

[0085] Comparative Example 7

[0086] The same as Example 1, except that the preparation method of the special fertilizer for high-sugar peanuts is:

[0087] The corn stalks are crushed and mixed with animal excrement (dry sheep excrement) and waste molasses, water is added to a water content of 50wt%, and then a composite bacterial agent (mixed by Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis and Rhizocystis endoradici in a mass ratio of 2:1:1:2) is added, mixed evenly, and then piled and fermented for 15 days. After the fermentation is completed, the fermented material is dried and crushed to obtain a fermentation dry material;

[0088] The fermented dry material is mixed with urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate, trace element chelate, sugarcane leaf extract and abscisic acid, and a binder (a sodium carboxymethyl cellulose aqueous solution with a concentration of 3wt%, the added amount of which is 5wt% of the mixture) is added for granulation, and then dried to obtain a special fertilizer for high-sugar peanuts.

[0089] Effect verification

[0090] Peanut planting experiment

[0091] Test location: a peanut planting area in Cixi City, Zhejiang Province

[0092] Thirty-three experimental plots were randomly divided in the peanut planting field, each with an area of ​​30 m 2 The experimental groups were respectively applied with the fertilizers prepared in Examples 1-3 and the fertilizers prepared in Comparative Examples 1-7, and the experimental plots applied with common compound fertilizer (N-P2O5-K2O 24-14-7) were used as the control group. Three parallel experiments were set for each group, and the final result was the average of the three groups. The experimental peanut variety was the high-sugar peanut variety Shuhua No. 9. The basal fertilizer was applied before peanut sowing, with a fertilizer application rate of 50 kg / mu. No fertilizer was applied during the entire growth period. Other field management activities were carried out in accordance with the local conventional management methods. The sugar content (sucrose content and total sugar content) of the peanut kernels was measured at the harvest time. The specific results are shown in Table 1.

[0093] Among them, the sucrose content is determined by referring to GB / T 5009.8-2003 "Determination of Sucrose in Foods", and the total sugar content is determined by referring to T / SDAS 510-2022 "Fehling's Reagent Method for Determination of Total Sugar and Soluble Sugar Content in Peanuts".

[0094] Table 1

[0095] Sucrose content (mg / g) Total sugar content (mg / g) Example 1 19.3 148.8 Example 2 20.5 158.2 Example 3 19.8 154.2 Comparative Example 1 18.0 138.7 Comparative Example 2 17.8 137.2 Comparative Example 3 18.2 140.1 Comparative Example 4 18.1 139.5 Comparative Example 5 17.6 135.6 Comparative Example 6 18.9 145.6 Comparative Example 7 18.5 142.5 Control group 16.1 124.0

[0096] As can be seen from Table 1, the sucrose content and total sugar content of Examples 1, 2, and 3 are significantly higher than those of the control group, indicating that the special fertilizer for high-sugar peanuts of the present invention can effectively increase the sucrose content and total sugar content of high-sugar peanut kernels. In Comparative Example 1, after potassium sulfate was replaced with potassium chloride, the sucrose content and total sugar content were both reduced compared with Example 1, indicating that potassium sulfate has a positive effect on the improvement of the sugar content of high-sugar peanuts. In Comparative Example 2, after abscisic acid was omitted, the sucrose content and total sugar content were also reduced compared with Example 1, indicating that abscisic acid has a promoting effect on the improvement of the sugar content of high-sugar peanuts. In Comparative Example 3, zinc was omitted during the preparation of the trace element chelate, resulting in a decrease in the sucrose content and total sugar content, indicating that zinc has a certain effect on the improvement of the sugar content of high-sugar peanuts. In Comparative Example 4, EDTA was replaced with amino acids during the preparation of the trace element chelate, resulting in a decrease in the sucrose content and total sugar content, indicating that zinc has a certain effect on the improvement of the sugar content of high-sugar peanuts. In Comparative Example 5, after omitting the sugarcane leaf extract, the sucrose content and total sugar content decreased significantly, indicating that the sugarcane leaf extract had a great influence on the increase of the sugar content of high-sugar peanuts. In Comparative Example 6, the composition of the composite bacterial agent was changed, resulting in a slightly lower sucrose content and total sugar content than Example 1, but still higher than the control group, indicating that the composition of the composite bacterial agent had a certain influence on the increase of the sugar content of high-sugar peanuts. In Comparative Example 7, the preparation method of the special fertilizer for high-sugar peanuts was changed, and the waste molasses was fermented together with corn stalks and animal manure, resulting in a sucrose content and total sugar content lower than Example 1, indicating that the fermentation process has an influence on the increase of the sugar content of high-sugar peanuts.

[0097] In summary, the high-sugar peanut fertilizer of the present invention can effectively increase the sucrose content and total sugar content of high-sugar peanut kernels, wherein potassium sulfate, abscisic acid, trace element chelate, sugarcane leaf extract and the composition and fermentation process of the composite bacterial agent all have an important influence on the increase of the sugar content of high-sugar peanuts. The above factors work synergistically to achieve the optimal effect of increasing the sugar content of high-sugar peanuts.

[0098] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A special fertilizer for high-sugar peanuts, characterized in that: The raw materials include the following components by mass: 20-30 parts of urea, 15-20 parts of superphosphate, 10-15 parts of potassium dihydrogen phosphate, 10-15 parts of potassium sulfate, 20-30 parts of corn straw, 15-20 parts of animal manure, 10-15 parts of waste molasses, 5-8 parts of trace element chelates, 3-5 parts of sugarcane leaf extract, 2-4 parts of composite bacterial agent, and 0.1-0.2 parts of abscisic acid; the trace element chelate is a chelate of zinc, manganese, boron, molybdenum and EDTA.

2. The high-sugar peanut fertilizer according to claim 1, characterized in that: The preparation steps of the trace element chelate include: mixing EDTA, sodium hydroxide and water, stirring until completely dissolved, adding manganese sulfate, zinc sulfate, boric acid and ammonium molybdate, heating to carry out chelation reaction, filtering, concentrating and drying after the reaction is completed to obtain the trace element chelate.

3. The high-sugar peanut fertilizer according to claim 2, characterized in that: The dosage ratio of EDTA, sodium hydroxide, water, manganese sulfate, zinc sulfate, boric acid and ammonium molybdate is 1 mol: 0.4-0.6 mol: 400-500 mL: 0.2-0.3 mol: 0.1-0.2 mol: 0.2-0.3 mol: 0.1-0.2 mol; the temperature of the chelating reaction is 70-80° C., and the time is 2-4 h.

4. The high-sugar peanut fertilizer according to claim 1, characterized in that: The preparation steps of the sugarcane leaf extract include: crushing sugarcane leaves to obtain sugarcane leaf powder; mixing the sugarcane leaf powder with water, extracting for 2-4 hours under ultrasonic-assisted conditions, and then concentrating and drying to obtain the sugarcane leaf extract.

5. The high-sugar peanut fertilizer as claimed in claim 4, characterized in that: The mass ratio of the sugarcane leaf powder to water is 1:6-8; the power of the ultrasonic wave is 200-400W.

6. The high-sugar peanut fertilizer according to claim 1, characterized in that: The composite bacterial agent comprises Trichoderma harzianum, Bacillus megaterium, Bacillus subtilis and Rhizocystis endoradici.

7. The high-sugar peanut fertilizer according to claim 6, characterized in that: By mass ratio, Trichoderma harzianum: Bacillus megaterium: Bacillus subtilis: Rhizospora endoradicata=2-3:1-2:1-2:2-3.

8. The method for preparing the high-sugar peanut fertilizer according to any one of claims 1 to 7, characterized in that: The following steps are involved: The corn stalks are crushed and mixed with animal feces, water is added to a water content of 50-60wt%, and then a composite bacterial agent is added, mixed evenly and then piled for fermentation, and after fermentation for 10-15 days, waste molasses is added, mixed evenly and then piled for fermentation for 5-10 days, and after the fermentation is completed, the fermented material is dried and crushed to obtain a fermentation dry material; The fermented dry material is mixed with urea, superphosphate, potassium dihydrogen phosphate, potassium sulfate, trace element chelate, sugarcane leaf extract and abscisic acid, and a binder is added for granulation to obtain the special fertilizer for high-sugar peanuts.

9. The preparation method according to claim 8, characterized in that: The binder is a sodium carboxymethyl cellulose aqueous solution.

10. The use of the special fertilizer for high-sugar peanuts according to any one of claims 1 to 7 in the planting of high-sugar peanuts, characterized in that: The special fertilizer for high-sugar peanuts is applied as base fertilizer for high-sugar peanut planting, and the application amount is 40-60kg / mu.