A natural high molecular weight polysaccharide synergistic drip irrigation fertilizer and its preparation method and application

Abstract

A natural high-molecular-weight polysaccharide synergistic drip irrigation fertilizer, its preparation method, and application, wherein the drip irrigation fertilizer comprises: a natural high-molecular-weight polysaccharide, a fertilizer, and an adjuvant; the natural high-molecular-weight polysaccharide comprises: one or more of xanthan gum, konjac glucomannan, calendula gum, gellan gum, pectin, or gum arabic; the adjuvant comprises: one or more of a urease inhibitor, a nitrification inhibitor, a phytase, a fatty alcohol polyoxyethylene ether, sodium alginate, rhamnolipid, 5-aminolevulinic acid, polyglutamic acid, γ-aminobutyric acid, or anhydrous magnesium sulfate. The present invention also discloses a preparation method and application of the drip irrigation fertilizer. The drip irrigation fertilizer of the present invention can improve soil, stimulate crop growth, and improve fertilizer utilization efficiency. It is easy to use, environmentally friendly, and can be applied to drip irrigation systems. The method of the present invention has a simple process, low cost, low energy consumption, is green and environmentally friendly, and is suitable for industrial production.

Description

Technical Field

[0001] The present invention relates to a drip irrigation fertilizer and a preparation method and application thereof, and in particular to a natural high-molecular polysaccharide synergistic drip irrigation fertilizer and a preparation method and application thereof. Background Art

[0002] Drip irrigation, as an efficient water and fertilizer management technology, is widely used in agricultural production in water-scarce areas. Due to the precision irrigation achieved by drip irrigation technology, it improves fertilizer utilization rate and reduces the use of chemical fertilizers. It is imperative to vigorously develop water-soluble fertilizers and promote water-fertilizer integration technology.

[0003] Existing drip irrigation water-soluble fertilizers have a significant drawback: simply mixing nitrogen, phosphorus, potassium, and trace elements in the fertilizer, which is affected by the pH of the soil during use, resulting in low utilization rates. According to reports, the current utilization rate of drip irrigation fertilizers is less than 30%, with 70% of the nitrogen volatilizing and depositing in the soil, causing soil compaction, secondary salinization, and groundwater pollution. In summary, providing a drip irrigation fertilizer that controls antagonism between fertilizers and improves utilization is an urgent problem that those skilled in the art need to solve.

[0004] CN104961614 A discloses an organic-inorganic drip irrigation fertilizer for Hami melons. The fertilizer is a mixture of several low-molecular-weight organic acids, including fulvic acid, citric acid, glucose, and polyamines, with several macronutrients, including nitrogen, phosphorus, and potassium. Although the fertilizer can supplement the soil with organic matter in practical applications, its main function is to regulate the pH of the drip irrigation fertilizer, which has a certain effect on increasing crop yields and enhancing the efficiency of nitrogen, phosphorus, and potassium fertilizers. However, usage data show that the fertilizer usage is large, and fertilizer conservation and efficiency enhancement are not prominent. Therefore, the fertilizer is only suitable for Hami melons and has a limited scope of application.

[0005] CN102311289 A discloses an organic water-soluble fertilizer, which is a mixture of potassium humate, citric acid, amino acids, vitamins, monosaccharides, fructose, glucose, polysaccharides, potassium sodium tartrate, several organic acids such as zinc sulfate, copper sulfate, manganese sulfate, boric acid, ammonium molybdate, ethylene glycol, ammonium phosphate, potassium dihydrogen phosphate, phosphoric acid, phosphorus, potassium, and several trace elements. The problem of antagonism between elements is not well solved. Although in practical applications, it can supplement a certain amount of organic matter to the soil and has a certain effect on increasing crop yield and enhancing the efficiency of nitrogen, phosphorus, and potassium fertilizers, it can be seen from the usage data that due to the low molecular weight organic matter used, the fertilizer usage is large, fertilizer saving and efficiency enhancement are not outstanding, and the cost is high.

[0006] CN110790600 A discloses a polysaccharide trace element fertilizer and a preparation method thereof. The fertilizer is prepared by complexing bagasse, molasses, tung bran, bran, soybean residue, nitrogen, phosphorus and potassium fertilizers, trace elements (Zn, B, Fe, etc.) in complexed form, and humic acid-complexed rare earth molasses with manganese sulfate monohydrate, ferrous sulfate monohydrate, zinc sulfate monohydrate, and copper sulfate pentahydrate for use in agricultural planting. Although the fertilizer has a better effect than direct mixing with conventional inorganic compounds, the fertilizer uses low-molecular-weight organic compound polysaccharides: bagasse, molasses, tung bran, bran, and soybean residue, so the fertilizer-saving and synergistic effects are not outstanding, and thus it cannot be widely promoted.

[0007] CN 103951506 A discloses a water-soluble fertilizer containing mushroom proteoglycan, which is a water-soluble fertilizer containing mushroom proteoglycan and the trace elements boron and zinc. Although the complexation of mushroom proteoglycan with the two trace elements boron and zinc can improve the utilization rate of the trace elements, the effect is limited.

[0008] The present invention provides a natural high molecular weight polysaccharide synergistic drip irrigation fertilizer, which can improve soil, stimulate crop growth, and improve fertilizer utilization efficiency. It is easy to use, environmentally friendly, and can be applied to a drip irrigation system. It has a simple process, low cost, low energy consumption, and is green and environmentally friendly. It is suitable for industrial production, as well as a preparation method and application thereof. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a natural polymer polysaccharide synergistic drip irrigation fertilizer and its application that can improve soil, stimulate crop growth, improve fertilizer utilization efficiency, be easy to use, and be environmentally friendly, and can be applied to drip irrigation systems.

[0010] The technical problem to be further solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a preparation method of a natural high molecular weight polysaccharide synergistic drip irrigation fertilizer with simple process, low cost, low energy consumption, green environmental protection and suitable for industrial production.

[0011] The technical solution adopted by the present invention to solve its technical problems is as follows: a natural high-molecular polysaccharide synergistic drip irrigation fertilizer, comprising: a natural high-molecular polysaccharide, a fertilizer and an adjuvant; the natural high-molecular polysaccharide comprises: one or more of xanthan gum, konjac glucomannan, caldara gum, gellan gum, pectin or gum arabic; the adjuvant comprises: one or more of a urease inhibitor, a nitrification inhibitor, phytase, fatty alcohol polyoxyethylene ether, sodium alginate, rhamnolipid, 5-aminolevulinic acid, polyglutamic acid, γ-aminobutyric acid or anhydrous magnesium sulfate.

[0012] The natural high-molecular polysaccharide used in the drip irrigation fertilizer of the present invention is an exosporium polysaccharide produced by biological fermentation. It is a biological high-molecular compound and a high-quality organic matter. It can be used by microorganisms in the soil to increase the community abundance of soil microorganisms, enhance soil tillage and buffering capacity, and improve the soil. The natural high-molecular polysaccharide can also be used as a biostimulant to stimulate crop growth and increase crop stress resistance. While improving the soil, it also increases the crop's resistance to adversity. The natural high-molecular polysaccharide has a chelating ability and can chelate medium and trace elements in fertilizers and soil, allowing ineffective nutrients to regain bioavailability, facilitating crop absorption and significantly improving the utilization efficiency of macro-element and medium and trace element fertilizers. The natural high-molecular polysaccharide releases hydrogen ions. After the hydrogen ions are released, the remaining anions are organic matter that can be decomposed and utilized by microorganisms without generating new salt, effectively reducing the problem of secondary soil salinization. The natural high-molecular polysaccharide is widely available and has been mass-produced, reducing costs.

[0013] In the drip irrigation fertilizer of the present invention, when fully water-soluble organic materials are combined with fully water-soluble inorganic materials, phenomena such as deliquescence, dissolution, and compaction easily occur, making commercial production impossible. The above difficulties are overcome by the combination of auxiliary agents such as fatty alcohol polyoxyethylene ether and anhydrous magnesium sulfate, making the drip irrigation fertilizer commercially applicable.

[0014] In addition, urease inhibitors can prevent and control nitrogen loss, thereby improving the utilization rate of nitrogen fertilizer; nitrification inhibitors and phytase can activate phosphorus, thereby improving the utilization rate of phosphate fertilizer; fatty alcohol polyoxyethylene ether can foam the soil after entering the soil, thereby achieving the purpose of loosening the soil; sodium alginate, rhamnolipid, 5-aminolevulinic acid, polyglutamic acid, and γ-aminobutyric acid are not only nutrients that can be absorbed by crops, but also culture media for soil microorganisms, and plant stimulants that can promote the development of crop root systems. The components in the drip irrigation fertilizer adjuvant of the present invention are superimposed and synergistic, thereby achieving the technical advantage of the present invention of further improving the utilization rate of soil fertilizer; at the same time, the effects of polysaccharides and adjuvants such as urease inhibitors, nitrification inhibitors, fatty alcohol polyoxyethylene ether, sodium alginate, rhamnolipid, 5-aminolevulinic acid, polyglutamic acid, and γ-aminobutyric acid are superimposed on each other, increasing the ability of crops to grow and form yield in the soil, improving the soil, and increasing crop yield and quality, with obvious economic benefits.

[0015] Preferably, the weight proportions of the components of the natural high molecular weight polysaccharide synergistic drip irrigation fertilizer are: 1 to 50 parts by weight of natural high molecular weight polysaccharide, 60 to 160 parts by weight of fertilizer, and 1 to 40 parts by weight of adjuvant.

[0016] Preferably, the molecular weight of the natural high molecular weight polysaccharide is 20,000 to 2 million Daltons.

[0017] Preferably, the natural high molecular weight polysaccharide comprises: 0.5-12.0 parts by weight of xanthan gum, 0.1-8.0 parts by weight of konjac glucomannan, 0.1-10.0 parts by weight of caldara gum, 0-5.0 parts by weight of gellan gum, 0-8.0 parts by weight of pectin, and 0-10.0 parts by weight of gum arabic.

[0018] More preferably, the natural high molecular weight polysaccharide comprises: 0.5-10.0 parts by weight of xanthan gum, 0.1-5.0 parts by weight of konjac glucomannan, 0.2-7.0 parts by weight of caldara gum, 0.3-3.0 parts by weight of gellan gum, 0.5-5.0 parts by weight of pectin, and 0.6-6.0 parts by weight of gum arabic.

[0019] Preferably, the adjuvants include: 0.1-2.0 parts by weight of urease inhibitor, 0.1-2.0 parts by weight of nitrification inhibitor, 0.1-3.0 parts by weight of phytase, 0.2-8.0 parts by weight of fatty alcohol polyoxyethylene ether, 0.2-6.0 parts by weight of sodium alginate, 0.1-5.0 parts by weight of rhamnolipid, 0-3.0 parts by weight of 5-aminolevulinic acid, 0-10.0 parts by weight of polyglutamic acid, 0-10.0 parts by weight of γ-aminobutyric acid, and 0.1-10.0 parts by weight of anhydrous magnesium sulfate.

[0020] More preferably, the adjuvant includes: 0.5-1.5 parts by weight of urease inhibitor, 0.5-1.5 parts by weight of nitrification inhibitor, 0.5-2.0 parts by weight of phytase, 0.5-5.0 parts by weight of fatty alcohol polyoxyethylene ether, 0.2-4.0 parts by weight of sodium alginate, 0.1-3.0 parts by weight of rhamnolipid, 0.2-2.0 parts by weight of 5-aminolevulinic acid, 0.7-7.0 parts by weight of polyglutamic acid, 0.6-6.0 parts by weight of γ-aminobutyric acid, and 1.0-5.0 parts by weight of anhydrous magnesium sulfate.

[0021] Preferably, the fertilizer comprises: 5 to 60 parts by weight of nitrogen fertilizer, 10 to 100 parts by weight of phosphorus fertilizer, 20 to 50 parts by weight of potassium fertilizer and 0.1 to 30 parts by weight of trace element additives.

[0022] Preferably, the nitrogen fertilizer includes one or more of urea, ammonium nitrate, ammonium sulfate or ammonium chloride.

[0023] Preferably, the phosphate fertilizer includes one or more of monoammonium phosphate, diammonium phosphate, ammonium polyphosphate, potassium polyphosphate or potassium dihydrogen phosphate.

[0024] Preferably, the potash fertilizer includes one or more of potassium chloride, potassium sulfate or potassium nitrate.

[0025] Preferably, the trace element additives include: one or more compounds containing zinc, manganese, boron, copper, iron or molybdenum.

[0026] Preferably, the nitrogen fertilizer includes 2 to 20 parts of urea.

[0027] Preferably, the phosphate fertilizer comprises: 1 to 40 parts of ammonium polyphosphate, 1 to 30 parts of monoammonium phosphate, 0 to 20 parts of diammonium phosphate and 1 to 30 parts of potassium dihydrogen phosphate.

[0028] More preferably, the phosphate fertilizer comprises: 10-40 parts of ammonium polyphosphate, 5-30 parts of monoammonium phosphate, 5-20 parts of diammonium phosphate and 5-30 parts of potassium dihydrogen phosphate.

[0029] Preferably, the potash fertilizer comprises: 2 to 30 parts of potassium nitrate and 0 to 30 parts of potassium chloride.

[0030] More preferably, the potash fertilizer comprises: 10 to 30 parts of potassium nitrate and 10 to 30 parts of potassium chloride.

[0031] Preferably, the trace element additives include: 0.1-6.0 parts by weight of zinc sulfate monohydrate, 0.1-6.0 parts by weight of manganese sulfate monohydrate, 0.1-3.0 parts by weight of copper sulfate pentahydrate, 0.1-6.0 parts by weight of ferrous sulfate monohydrate, 0.1-8.0 parts by weight of anhydrous ammonium molybdate, and 0.2-6.0 parts by weight of boric acid.

[0032] The present invention further solves its technical problems by employing the following technical solution: a method for preparing a natural high-molecular-weight polysaccharide synergistic drip irrigation fertilizer, comprising uniformly mixing crushed and sieved natural high-molecular-weight polysaccharide, fertilizer, and additives in a dry, enclosed mixing device. Conventional fertilizers are generally prepared by direct mixing, which can cause reactions between the various elements and lead to compaction due to water loss. However, the drip irrigation fertilizer of the present invention utilizes high-molecular-weight polysaccharides to prevent direct contact between the various elements in the fertilizer, enabling friendly mixing without antagonism.

[0033] Preferably, the natural high molecular weight polysaccharide is passed through a 40-90 mesh sieve.

[0034] Preferably, the natural high molecular weight polysaccharide is dried at 80-100° C. to a moisture content of ≤2% before being crushed.

[0035] Preferably, the fertilizer is sieved through a 30-50 mesh sieve.

[0036] Preferably, the auxiliary agent is sieved through 80-90 mesh.

[0037] The present invention further solves its technical problems by adopting the following technical solutions: an application of a natural high molecular weight polysaccharide synergistic drip irrigation fertilizer, in which the natural high molecular weight polysaccharide synergistic drip irrigation fertilizer is dripped into the soil along with water during the application of drip irrigation and sprinkler irrigation technology.

[0038] Preferably, the dosage of the natural high molecular polysaccharide synergistic drip irrigation fertilizer is 1-15 kg / mu each time, and the total dosage during the entire crop growth period is 10-90 kg / mu.

[0039] Preferably, the mass ratio of the water dripped in with the water to the natural high molecular polysaccharide synergistic drip irrigation fertilizer is 100 to 50,000:1 (more preferably 100 to 5,000:1).

[0040] The beneficial effects of the present invention are as follows:

[0041] (1) The drip irrigation fertilizer of the present invention can improve soil, stimulate crop growth, and increase fertilizer utilization efficiency, with a fertilizer saving rate of up to 22.0%;

[0042] (2) The method of the present invention has simple process, low cost, low energy consumption, is green and environmentally friendly, and is suitable for industrial production;

[0043] (2) The drip irrigation fertilizer of the present invention is easy to use, environmentally friendly, and can be applied to drip irrigation systems. DETAILED DESCRIPTION

[0044] The present invention will be further described below with reference to the embodiments.

[0045] The xanthan gum, konjac glucomannan, caldara gum, gellan gum, pectin, and gum arabic used in the Examples of the present invention and the Comparative Examples have a molecular weight of 20,000 to 2,000,000 Daltons and are all commercially available. The raw materials or chemical reagents used in the Examples of the present invention and the Comparative Examples, unless otherwise specified, were obtained through conventional commercial channels.

[0046] Examples 1 to 6 of a natural high molecular weight polysaccharide synergistic drip irrigation fertilizer

[0047] The components and weight parts of Examples 1 to 6 and Comparative Examples 1 and 2 of a natural high molecular weight polysaccharide synergistic drip irrigation fertilizer are shown in Table 1.

[0048] Table 1 Components and weight percentages of Examples 1 to 6 and Comparative Examples 1 and 2 of a natural polymer polysaccharide synergistic drip irrigation fertilizer

[0049]

[0050] Note: “-” in the table means not added.

[0051] Preparation Method of a Natural Polysaccharide Synergistic Drip Irrigation Fertilizer Examples 1 to 6

[0052] According to the components and weight portions of Examples 1 to 6 of a natural high molecular weight polysaccharide synergistic drip irrigation fertilizer in Table 1, the crushed natural high molecular weight polysaccharide, the fertilizer passed through a 50 mesh sieve, and the adjuvant passed through an 80 mesh sieve are mixed uniformly in a dry, closed mixing device to obtain the product; before crushing, the natural high molecular weight polysaccharide is dried at 100° C. to a moisture content of ≤2%.

[0053] Comparative Examples 1 and 2 of a Preparation Method for Drip Irrigation Fertilizer

[0054] The only difference between the preparation method comparative examples 1 and 2 and the preparation method embodiments 1 to 6 is that the drip irrigation fertilizers are prepared according to the components and weight parts of the drip irrigation fertilizer comparative examples 1 and 2 in Table 1, respectively.

[0055] Application Examples 1 to 3 of a Natural Polysaccharide Synergistic Drip Irrigation Fertilizer

[0056] The experimental area is located in Xinjiang Shuangde Cotton Planting Farm in Yuepu Lake County, Xinjiang. The owner is Wang Guomin, the farm covers an area of ​​3,000 mu (the area of ​​application examples 1 to 3 is 100 mu each), the soil is desertified soil with low fertility and high management level; the field planting time is April 11, 2021; the test cotton variety is Xinluzhong No. 42, with conventional management and a cotton planting density of 16,000 plants / mu.

[0057] In the application of drip irrigation technology, the natural high molecular weight polysaccharide synergistic drip irrigation fertilizers of Examples 1, 4, and 6 are dripped into the soil along with water.

[0058] Comparative Examples 1 and 2 of Drip Irrigation Fertilizer Application

[0059] The difference between the comparative examples 1 and 2 of the present application and the application examples 1 to 3 is that the drip irrigation fertilizers obtained in the preparation method comparative examples 1 and 2 are respectively dripped into the soil along with water.

[0060] The dripping conditions of Application Examples 1 to 3 of the present invention, Application Comparative Examples 1 and 2, and conventional drip irrigation fertilizers, and the amount of the drip irrigation fertilizer dripped with water are shown in Table 2.

[0061] Table 2 Comparison of dripping conditions and the amount of drip irrigation fertilizer used in Examples 1 to 3 of the present invention and conventional drip irrigation fertilizer

[0062]

[0063] Note: “-” in the table means not used.

[0064] As shown in Table 2, the fertilizer saving rate of Application Examples 1 to 3 of the present invention is 22.0% compared with conventional drip irrigation fertilizer.

[0065] The growth and economic properties of the natural high molecular polysaccharide synergistic drip irrigation fertilizers of Examples 1 to 3 and Comparative Examples 1 and 2, as well as conventional drip irrigation fertilizers, were evaluated in actual applications. The results are shown in Table 3.

[0066] Table 3 Comparison of growth and economic characteristics of cotton in application examples 1 to 3 of the present invention, comparative examples 1 and 2, and conventional drip irrigation fertilizers

[0067]

[0068] Note: The “yield increase rate” in the table is calculated based on the yield of conventional drip irrigation fertilizer.

[0069] It can be seen from Tables 2 and 3 that when the fertilizer saving rate of Example 1 is 22.0%, the seed cotton yield per mu reaches 433.6 kg, which is 78.8 kg higher than that of conventional drip irrigation fertilizer. According to the average market price of seed cotton in 2021 of 7.8 yuan / kg, the average income per mu increases by 614.64 yuan, and 24 kg of fertilizer is saved. Calculated at 5.6 yuan / kg, the fertilizer saving is 134.4 yuan, and the total income per mu increases by 749.04 yuan.

[0070] In application example 2, when the fertilizer saving rate was 22.0%, the seed cotton yield per mu reached 445.8 kg, which was 91 kg higher than that of conventional drip irrigation fertilizer. According to the average market price of seed cotton in 2021 of 7.8 yuan / kg, the average income per mu increased by 709.8 yuan, and 24 kg of fertilizer was saved. Calculated at 5.6 yuan / kg, the fertilizer saving was 134.4 yuan, and the total income per mu increased by 844.2 yuan.

[0071] When the fertilizer saving rate of Application Example 3 is 22.0%, the seed cotton yield per mu reaches 447.2 kg, which is 92.4 kg higher than that of conventional drip irrigation fertilizer. According to the average market price of seed cotton in 2021 of 7.8 yuan / kg, the average income per mu increases by 720.72 yuan, and 24 kg of fertilizer is saved. Calculated at 5.6 yuan / kg, the fertilizer saving is 134.4 yuan, and the total income per mu increases by 855.12 yuan.

[0072] When the fertilizer saving rate of comparative example 1 is the same as that of application examples 1 to 3 at 22.0%, the seed cotton yield per mu is only 394.4 kg, which is only 39.6 kg higher than that of conventional drip irrigation fertilizer. According to the average market price of seed cotton in 2021 of 7.8 yuan / kg, the average income per mu only increases by 308.88 yuan, and 24 kg of fertilizer is saved. Calculated at 5.6 yuan / kg, the fertilizer saving is 134.4 yuan, and the total income per mu increased by only 443.28 yuan.

[0073] When the fertilizer saving rate of comparative example 2 is the same as that of application examples 1 to 3 at 22.0%, the seed cotton yield per mu is only 400.5 kg, which is only 45.7 kg higher than that of conventional drip irrigation fertilizer. According to the average market price of seed cotton in 2021 of 7.8 yuan / kg, the average income per mu only increases by 356.46 yuan, and 24 kg of fertilizer is saved. Calculated at 5.6 yuan / kg, the fertilizer saving is 134.4 yuan, and the total income per mu increased by only 490.86 yuan.

[0074] In summary, the application examples 1 to 3 of the natural high molecular weight polysaccharide synergistic drip irrigation fertilizer of the present invention save 22.0% of fertilizer compared with the conventional drip irrigation fertilizer, indicating that it can improve the utilization rate of fertilizer, increase the quality and yield of cotton, increase crop income, and ultimately achieve the purpose of reducing weight and increasing efficiency; while the application comparative examples 1 and 2 lack natural high molecular weight polysaccharides or adjuvants, respectively, so that their corresponding performance cannot be fully exerted, and the synergistic effect between the natural high molecular weight polysaccharide and the adjuvant is lost, thereby reducing the yield increase effect.

Claims

1. A natural high molecular weight polysaccharide synergistic drip irrigation fertilizer, characterized in that: include: 1-50 parts by weight of natural high molecular weight polysaccharide, 60-160 parts by weight of fertilizer and 1-40 parts by weight of auxiliary agent; The molecular weight of the natural high molecular weight polysaccharide is 20,000 to 2 million Daltons; The natural high molecular weight polysaccharide comprises: 0.5-12.0 parts by weight of xanthan gum, 0.1-8.0 parts by weight of konjac glucomannan, 0.1-10.0 parts by weight of caldara gum, 0-5.0 parts by weight of gellan gum, 0-8.0 parts by weight of pectin, and 0-10.0 parts by weight of gum arabic; The auxiliary agents include: 0.1-2.0 parts by weight of urease inhibitor, 0.1-2.0 parts by weight of nitrification inhibitor, 0.1-3.0 parts by weight of phytase, 0.2-8.0 parts by weight of fatty alcohol polyoxyethylene ether, 0.2-6.0 parts by weight of sodium alginate, 0.1-5.0 parts by weight of rhamnolipid, 0-3.0 parts by weight of 5-aminolevulinic acid, 0-10.0 parts by weight of polyglutamic acid, 0-10.0 parts by weight of gamma-aminobutyric acid, and 0.1-10.0 parts by weight of anhydrous magnesium sulfate.

2. The natural high molecular weight polysaccharide synergistic drip irrigation fertilizer according to claim 1, characterized in that: The fertilizer comprises: 5 to 60 parts by weight of nitrogen fertilizer, 10 to 100 parts by weight of phosphorus fertilizer, 20 to 50 parts by weight of potassium fertilizer and 0.1 to 30 parts by weight of trace element additives; The nitrogen fertilizer includes: one or more of urea, ammonium nitrate, ammonium sulfate or ammonium chloride; The phosphate fertilizer includes one or more of monoammonium phosphate, diammonium phosphate, ammonium polyphosphate, potassium polyphosphate or potassium dihydrogen phosphate; the potash fertilizer includes one or more of potassium chloride, potassium sulfate or potassium nitrate; The trace element additives include: one or more compounds containing zinc, manganese, boron, copper, iron or molybdenum.

3. The natural high molecular weight polysaccharide synergistic drip irrigation fertilizer according to claim 2, characterized in that: The nitrogen fertilizer includes: 2 to 20 parts of urea; The phosphate fertilizer comprises: 1 to 40 parts of ammonium polyphosphate, 1 to 30 parts of monoammonium phosphate, 0 to 20 parts of diammonium phosphate and 1 to 30 parts of potassium dihydrogen phosphate; The potash fertilizer comprises: 2 to 30 parts of potassium nitrate and 0 to 30 parts of potassium chloride; The trace element additives include: 0.1-6.0 parts by weight of zinc sulfate monohydrate, 0.1-6.0 parts by weight of manganese sulfate monohydrate, 0.1-3.0 parts by weight of copper sulfate pentahydrate, 0.1-6.0 parts by weight of ferrous sulfate monohydrate, 0.1-8.0 parts by weight of anhydrous ammonium molybdate, and 0.2-6.0 parts by weight of boric acid.

4. A method for preparing the natural high molecular weight polysaccharide synergistic drip irrigation fertilizer according to any one of claims 1 to 3, characterized in that: The crushed and sieved natural high molecular weight polysaccharide, fertilizer and additives are mixed evenly in a dry and closed mixing device to obtain the product.

5. The method for preparing the natural high molecular weight polysaccharide synergistic drip irrigation fertilizer according to claim 4, characterized in that: The natural high molecular weight polysaccharide is passed through a 40-90 mesh sieve; the natural high molecular weight polysaccharide is dried at 80-100° C. to a moisture content of ≤2% before being crushed; the fertilizer is passed through a 30-50 mesh sieve; and the additive is passed through an 80-90 mesh sieve.

6. A use of the natural high molecular weight polysaccharide synergistic drip irrigation fertilizer according to any one of claims 1 to 3, characterized in that: In the application of drip irrigation and sprinkler irrigation technology, the natural high molecular polysaccharide synergistic drip irrigation fertilizer according to any one of claims 1 to 3 is dripped into the soil along with water.

7. The use of the natural high molecular weight polysaccharide synergistic drip irrigation fertilizer according to claim 6, characterized in that: The dosage of the natural high molecular polysaccharide synergistic drip irrigation fertilizer is 1 to 15 kg / mu each time, and 10 to 90 kg / mu in total during the entire crop growth period; the mass ratio of the water dripped in with the water to the natural high molecular polysaccharide synergistic drip irrigation fertilizer is 100 to 50,000:1.

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