Soil nutrition regulator for crop planting and preparation method thereof

Abstract

The invention relates to the technical field of soil conditioning, in particular to a soil nutrition conditioning agent for crop planting and a preparation method thereof, and the soil nutrition conditioning agent is prepared from the following raw materials in parts by weight: 20-40 parts of organic fermentation liquor, 1-3 parts of sodium glutamate, 30-50 parts of adsorptive filler, 10-15 parts of water-absorbent resin and 10-15 parts of adhesive; the preparation raw materials also comprise at least one of 0.01 to 2 parts by weight of indolebutyric acid, 0.01 to 2 parts by weight of naphthylacetic acid and 0.001 to 0.5 part by weight of S-abscisic acid; the adhesive is formed by mixing polylactic acid, sulfonated modified lignin, polyvinyl alcohol and a silane coupling agent according to the weight ratio of (10-15): (5-8): (3-5): (0.5-2); the soil nutrient regulator is prepared by matching a plurality of preparation raw materials and adopting a specific method, is safe and pollution-free, can improve the comprehensive properties of fertility enhancement, air permeability, water retention, pest and disease resistance and the like of soil, and promotes the growth and development of crops.

Description

Technical Field

[0001] The present application relates to the technical field of soil conditioning, and in particular to a soil nutrient regulator for crop planting and a preparation method thereof. Background Art

[0002] Crops play a vital role in people's diet. They are not only delicious, but also provide rich nutrients for the human body. For example, crops are an important source of vitamins, especially vitamin C, vitamin K, folic acid and various B vitamins. These vitamins play an important role in maintaining normal physiological functions of the human body, promoting cell repair and regeneration, and enhancing immunity. Crops are also rich in minerals such as potassium, magnesium, iron, calcium, etc. These minerals are essential for maintaining heart health, bone strength, blood formation, etc. In addition, crops are rich in dietary fiber, which helps promote intestinal peristalsis, prevent constipation, and help maintain the balance of intestinal flora, thereby protecting intestinal health.

[0003] When planting crops, in order to ensure the continuous supply of certain crops and meet market demand, many places tend to use continuous cropping. Continuous cropping refers to the continuous planting of the same crop on the same field, which can improve land use efficiency. For farmers, continuous cropping helps to maintain the relative stability of local crop varieties and technologies, making it easier to master and manage the planting techniques of the same type of crops, and reduce the technical learning costs caused by variety changes. At the same time, in order to increase crop yields and ensure the beauty of crops, chemical fertilizers and pesticides will also be used for a long time when planting crops. However, long-term continuous cropping will lead to excessive consumption of certain nutrients in the soil, while other elements are relatively enriched, causing nutrient imbalance. Continuous cropping causes pathogens and pests to accumulate in the soil, increasing the incidence and severity of pests and diseases. In addition, long-term continuous cropping will destroy the soil structure, deteriorate air permeability, and reduce the ability to retain water and fertilizer. The long-term use of chemical fertilizers and pesticides will further aggravate the problems of soil compaction and soil pollution.

[0004] In order to improve soil problems in crop planting, it is necessary to use soil nutrient regulators. Soil nutrient regulators, also commonly known as soil conditioners or soil improvers, are products used to improve the physical, chemical and biological properties of soil, usually improving soil permeability and replenishing soil fertility.

[0005] However, existing soil nutrient regulators still have some shortcomings. Due to the problem of raw material matching, the nutrients in the soil are released too quickly and cannot be effective for a long time. The effect on regulating crop growth is not obvious, and the comprehensive ability of resisting diseases and pests and retaining water is insufficient. Summary of the invention

[0006] The present application aims to overcome at least one of the defects of the prior art and provide a soil nutrient regulator for crop cultivation and a preparation method thereof. The soil nutrient regulator is prepared by combining a variety of preparation raw materials and adopting a specific method. The prepared soil nutrient regulator is not only safe and pollution-free, but also can improve the comprehensive properties of the soil such as fertility, air permeability, water retention, and disease and pest resistance, thereby promoting the growth and development of crops.

[0007] In a first aspect, the present application provides a soil nutrient regulator for crop planting, which is implemented by the following technical solutions:

[0008] A soil nutrient regulator for crop planting, comprising the following raw materials in parts by weight:

[0009] 20-40 parts of organic fermentation liquid, 1-3 parts of sodium glutamate, 30-50 parts of adsorptive filler, 10-15 parts of water-absorbent resin, and 10-15 parts of adhesive;

[0010] Wherein, the raw material for preparation further contains at least one of 0.01-2 parts of indolebutyric acid, 0.01-2 parts of naphthylacetic acid or 0.001-0.5 parts of S-inducible in parts by weight;

[0011] The adhesive is prepared by mixing polylactic acid, sulfonated modified lignin, polyvinyl alcohol and silane coupling agent in a weight ratio of (10-15):(5-8):(3-5):(0.5-2);

[0012] The preparation method of the sulfonated modified lignin comprises the following steps:

[0013] Lignin and Na 2 SO 3 Mix evenly according to the weight ratio of (3-5):(2-3), add 15% by mass of NaOH solution, and react at a temperature of 150-200° C. for 3-5 hours to obtain sulfonated modified lignin;

[0014] The preparation method of the adsorbent filler comprises the following steps:

[0015] B1. Volcanic mud, Al 2 O 3 The powder and activated carbon powder are added into the aqueous solution of silane coupling agent, ultrasonicated and stirred to prepare a suspension;

[0016] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0017] B3 weighed zeolite particles 30-40 parts by weight, 20-30 parts by weight of gangue powder, 30-40 parts by weight of clay, 4-8 parts by weight of ammonium bicarbonate, 35-50 parts by weight of the composite powder, mixed uniformly, added 25-35 parts by weight of water, granulated to form particles;

[0018] B4. The particles are preheated to 105-115°C, calcined at 500-700°C, and cooled to prepare an adsorptive filler.

[0019] The soil nutrient regulator for crop planting according to the embodiment of the present application has at least the following beneficial effects:

[0020] The present application combines an adsorptive filler with various raw materials such as organic fermentation liquid, plant growth regulators, sodium glutamate, etc., so that some nutrients are adsorbed inside the adsorptive filler, thereby slowing down the release rate of nutrients and plant growth regulators in the organic fermentation liquid. The raw materials are coordinated and promoted with each other, so as to give full play to the efficacy of each raw material, supplement organic matter and nutrients in the soil, improve soil fertility, and promote plant growth and development.

[0021] The adhesive of the present application is soluble in water and is not easy to clog the adsorption pores of the adsorbent filler. The adhesive can be naturally degraded in the soil. The adhesive raw material itself and its degradation products are pollution-free to the environment. The adhesive is rich in a large number of hydroxyl and carboxyl functional groups. After being applied to the soil, its functional groups can agglomerate and bond soil particles through electrostatic adsorption to form large-diameter soil particles with a granular structure, effectively improving the soil structure, enhancing the erosion resistance, disintegration resistance and water stability of the soil particles, and improving the water retention and soil solidification properties; the polylactic acid molecular chain in the adhesive contains a large number of ester bonds and carboxyl groups, and these functional groups have a strong interaction with water molecules, thereby absorbing moisture in the soil, and can also help plants absorb moisture, further improving water retention.

[0022] The polylactic acid and lignin in the adhesive of the present application are both derived from renewable resources, and the polylactic acid is biodegradable, so the adhesive has excellent environmental performance. Lignin has abundant active functional groups such as phenolic hydroxyl groups, which give it strong chemical reactivity and bonding properties. After sulfonation modification, the dispersibility and compatibility of lignin in polylactic acid emulsion are improved, further enhancing the bonding properties of the adhesive.

[0023] The water-absorbent resin particles of the present application can absorb and store water in the soil, reduce the evaporation of water in the soil, and improve the water retention capacity of the soil. The water-absorbent resin particles swell after absorbing water, which facilitates the dispersion of soil nutrient regulators in the soil, gradually releases the nutrients and plant growth regulators therein, and promotes the growth of crops.

[0024] The adsorbent filler of the present application is prepared by sintering and has a porous structure. It can adsorb microorganisms, improve soil structure, increase soil permeability, and is beneficial to the respiration and growth of plant roots.

[0025] The sodium glutamate of the present application can combine with calcium ions in the soil to form calcium glutamate. This compound can promote soil colloid coagulation, making the soil loose and breathable, which is beneficial to the growth of crop roots; at the same time, sodium glutamate can also promote the reproduction and activity of microorganisms in the soil, increase soil fertility, and provide sufficient nutrition for crops; secondly, sodium glutamate can promote plant root development and chlorophyll synthesis, thereby accelerating the growth rate of plants; in addition, sodium glutamate can inhibit the reproduction of pathogens in the soil, reduce the risk of plant diseases, and prevent the occurrence of diseases and insect pests.

[0026] The indolebutyric acid of the present application is a root-promoting plant growth regulator, which mainly promotes cell elongation, induces and promotes cell differentiation, controls apical dominance, promotes lateral root and adventitious root formation, regulates flowering and sexual differentiation, and regulates fruit setting and fruit development; S-inducing factor has the ability to promote the balanced absorption of water and fertilizer by plants and coordinate metabolism in the body, can effectively regulate the root / crown and vegetative growth and reproductive growth of plants, improve the quality and yield of crops, and can effectively activate the anti-stress immune system in plants, and has the ability to strengthen the source and enhance the comprehensive resistance of plants; naphthylacetic acid has the effect of promoting rooting, can significantly stimulate plant growth, promote root development, and increase germination rate, and can also effectively prevent falling flowers and fruits, increase fruit setting rate, and can reduce the production of ethylene in plants, thereby delaying aging, making plants strong, and improving the yield and quality of crops.

[0027] The organic fermentation liquid of the present application contains rich nutrients and various trace elements, and at the same time serves as a carrier of sodium glutamate and plant growth regulators, making it easier to evenly disperse the plant growth regulators and avoiding excessive local concentrations that affect the growth of crops.

[0028] In this application, volcanic mud, activated carbon powder and Al 2 O 3 Powder compounding, making full use of the electrostatic attraction effect of volcanic mud, Al 2 O 3 The porous flocculation effect of the activated carbon and the adsorption effect of the activated carbon are beneficial for the microorganisms to adhere to the surface of the filler and improve their biological activity. The carboxyethyl cellulose in the composite powder plays a bonding role, and it is combined with the silane coupling agent to improve the bonding between the activated carbon and Al 2 O 3 The interface bonding makes it difficult for the two to separate in the subsequent granulation process. 2 O 3It can improve the activity of microorganisms and make it easier for oxygen to accumulate on the surface of the filler, so that microorganisms are more likely to be enriched on the surface of the filler. Activated carbon is used to increase the adsorption strength. The combination of the two can create good reproduction conditions for microorganisms, improve the density of the biofilm, and thus improve the treatment efficiency of soil pollutants.

[0029] The reaction temperature, reaction time and Na in the preparation of sulfonated modified lignin in this application 2 SO 3 The conditions such as the dosage of Na are carefully set. For example, too high a reaction temperature may lead to lignin degradation, and Na 2 SO 3 Using too much may increase the cost and reduce the purity of the product.

[0030] According to some embodiments of the present application, the Al in step B1 2 O 3 The weight ratio of the powder to the volcanic mud and the activated carbon powder is (1-3):1:1.

[0031] According to some embodiments of the present application, the particle size of the particles in step B3 is 2-4 mm.

[0032] According to some embodiments of the present application, the particle size of the zeolite particles in step B3 is 1-2 mm.

[0033] According to some embodiments of the present application, the method for preparing the organic fermentation broth comprises the following steps:

[0034] A1. Starting materials, comprising the following components in parts by weight: 100-200 parts of feces, 30-50 parts of berries, 10-15 parts of garlic straw, 8-12 parts of pepper straw, 10-15 parts of tobacco straw, 10-15 parts of peach leaves, 12-18 parts of locust leaves, 12-18 parts of neem leaves, 5-10 parts of cosmos, 4-8 parts of morning glory;

[0035] A2. Adding a composite strain to the starting material, wherein the composite strain is added in an amount of 0.6-1.2% by weight of the starting material;

[0036] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 50-90 parts of biological humic acid fermented in kitchen, 5-10 parts of quicklime, 0.01-0.1 parts of polyaspartic acid, 6-12 parts of vermiculite powder, 2-5 parts of zeolite powder, and 10-15 parts of nitrification inhibitor;

[0037] A4. Back-mixing. Fermentation includes the initial fermentation, the middle fermentation and the late fermentation. The materials of the middle fermentation period of 3-5 days are back-mixed. The back-mixing amount is 10-30% of the starting material. The fermented material is filtered to obtain an organic fermentation liquid.

[0038] Garlic straw is rich in nutrients such as protein, fat, carbohydrates and niacin. After fermentation, it can supplement the nutrients needed by plants and has a certain antibacterial effect, which can enhance the disease and antibacterial resistance of plants. Pepper straw is spicy and hot in nature, which can enhance the disease and insect resistance of plants. Tobacco straw is rich in organic matter and nutrients such as nitrogen, phosphorus and potassium. After fermentation, it can be degraded into organic matter, which can not only improve soil structure and soil fertility, but also promote the growth of crops and improve yield and quality. Peach leaves have the effects of clearing heat and detoxifying, killing insects and relieving itching, which can enhance the disease and insect resistance of plants. Sophora japonica leaves contain a large amount of organic matter and elements such as nitrogen, phosphorus and potassium, and are rich in nutrients. They can increase soil fertility and improve soil structure. Neem leaves are rich in organic matter, which can provide sufficient nutrition and are beneficial to plant growth. Fermented products can improve soil structure and enhance soil fertility. Cosmos can repel various moths and insects. Rosemary can repel cabbage moths, carrot flies, bean beetles, etc. Morning glory attracts aphid flies to protect the plants that rely on it from the harm of aphids.

[0039] Furthermore, the garlic stalks, pepper stalks, tobacco stalks, peach leaves, locust leaves, chinaberry leaves, cosmos and morning glory in step A1 are washed, cut, dried, crushed and sieved with 1-10 mesh before mixing.

[0040] Furthermore, the berries in step A1 include at least one of apples, oranges, pears, dates, persimmons, grapes, and watermelons.

[0041] Furthermore, the berries include citrus, jujube, and watermelon in a weight ratio of (0.5-2): (0.5-2): 1. Jujube contains a variety of vitamins, minerals, amino acids and other ingredients, which are suitable for plant growth and can be used to make fermentation liquid to improve fertilizer efficiency.

[0042] Furthermore, the composite bacterial strain in step A2 includes at least one of actinomycetes, yeast, Bacillus subtilis, white rot fungi, nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria, and lactic acid bacteria.

[0043] Furthermore, the composite bacteria are mixed by actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria in a weight ratio of (1-2):(1-3):(1-4):(1-4):(1-4).

[0044] According to some embodiments of the present application, the method for preparing the water-absorbent resin comprises the following steps:

[0045] 40-50 parts of acrylamide, 4-8 parts of acrylic acid, 0.4-0.6 parts of potassium persulfate and 0.02-0.03 parts of methylene bisacrylamide are mixed, and 0.1-0.2 parts of N,N,N',N'-tetramethylethylenediamine are added dropwise, mixed evenly, and reacted for 1-3 hours; the obtained gel polymer is dried and then crushed into resin particles; the resin particles are subjected to pressure spray treatment with sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbing resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate is 1-2wt% of the resin particles.

[0046] Furthermore, the reaction temperature is 5-30°C, for example, the reaction temperature is 20°C.

[0047] Furthermore, the average particle size of the resin particles is 0.05-0.1 mm, for example, the average particle size of the resin particles is 0.05 mm.

[0048] In a second aspect, the present application provides a method for preparing the soil nutrient regulator for crop planting, which is achieved by the following technical solutions:

[0049] The preparation method of the soil nutrient regulator for crop planting comprises the following steps:

[0050] (1) mixing at least one of indolebutyric acid, naphthylacetic acid or S-absorbent with an organic fermentation liquid, sodium glutamate and an adsorbent filler according to weight parts for sufficient adsorption;

[0051] (2) adding a water-absorbing resin according to parts by weight, mixing uniformly, and then evenly spreading a binder on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor;

[0052] (3) Extruding and granulating the soil nutrient regulator precursor of step (2), adjusting the granulation conditions so that the particle size is controlled at 3-5 mm, and then drying to obtain the soil nutrient regulator.

[0053] The method for preparing the soil nutrient regulator for crop planting according to the embodiment of the present application has at least the following beneficial effects:

[0054] The preparation method of the present application has simple steps. By mixing and fully adsorbing the organic fermentation liquid, the plant growth regulator, sodium glutamate and the adsorbent filler, part of the nutrients are adsorbed into the interior by the adsorbent filler, which can slow down the release rate of the nutrients and plant growth regulators in the organic fermentation liquid. The water-absorbent resin is mixed with other raw materials through an adhesive, and the adhesive can be dissolved in water. The water-absorbent resin particles swell after absorbing water, which is convenient for the soil nutrient regulator to be dispersed in the soil, and the nutrients and plant growth regulators therein are gradually released to promote the growth of crops. At the same time, the preparation method of the present application does not require the use of complex production equipment, has low cost, is pollution-free in the manufacturing process, does not emit toxic substances, does not harm the health of operators, and is suitable for industrial production. DETAILED DESCRIPTION

[0055] To make the purpose, technical solution and advantages of the present application clearer, the following will be further described in detail in conjunction with specific embodiments. The embodiments described here are only part of the embodiments of the present application and cannot be understood as limiting the scope of protection of the present application.

[0056] Example 1

[0057] Preparation of soil nutrient regulator for crop cultivation:

[0058] (1) Preparation of organic fermentation broth:

[0059] A1. Starting materials, comprising the following components in parts by weight: 150 parts of feces, 40 parts of berries, 12 parts of garlic straw, 10 parts of pepper straw, 13 parts of tobacco straw, 12 parts of peach leaves, 16 parts of locust leaves, 14 parts of neem leaves, 7 parts of cosmos, 6 parts of morning glory; wherein the berries are mixed with citrus, jujube and watermelon in a weight ratio of 1.2:1.5:1; garlic straw, pepper straw, tobacco straw, peach leaves, locust leaves, neem leaves, cosmos, morning glory are washed, cut, dried, crushed and sieved through a 1-10 mesh sieve before mixing;

[0060] A2. Adding a composite bacterial strain to the starting material, the amount of the composite bacterial strain added is 1% by weight of the starting material; the composite bacterial strain is composed of actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria mixed in a weight ratio of 2:2:3:2:3;

[0061] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 70 parts of biological humic acid fermented in kitchen, 8 parts of quicklime, 0.05 parts of polyaspartic acid, 9 parts of vermiculite powder, 4 parts of zeolite powder, and 12 parts of nitrification inhibitor;

[0062] A4. Back-mixing, fermentation includes early fermentation, mid-fermentation and late fermentation, the fermentation mid-3-5 days of material back-mixing, back-mixing amount of 20% of the starting material, the fermentation was filtered to obtain an organic fermentation broth;

[0063] (2) Preparation of adsorbent filler:

[0064] B1. Volcanic mud, Al 2 O 3 The powder and activated carbon powder are added to the aqueous solution of γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 2:1:1, and ultrasonicated and stirred to prepare a suspension;

[0065] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0066] B3 weighed 35 parts by weight of zeolite particles having a particle size of 1-2mm, 25 parts by weight of coal gangue powder, 35 parts by weight of clay, 6 parts by weight of ammonium bicarbonate, 42 parts by weight of the composite powder, mixed uniformly, added 30 parts by weight of water, granulated to form particles having a particle size of 2-4mm;

[0067] B4. The particles are preheated to 110 ° C, then calcined at 650 ° C, cooled, and prepared as an adsorbent filler;

[0068] (3) Preparation of water-absorbent resin:

[0069] 45 parts of acrylamide, 6 parts of acrylic acid, 0.5 parts of potassium persulfate and 0.02 parts of methylene bisacrylamide were mixed, and 0.15 parts of N,N,N',N'-tetramethylethylenediamine were added dropwise, mixed evenly, and reacted at a temperature of 20°C for 2 hours; the obtained gel polymer was dried and then crushed into resin particles with an average particle size of 0.05 mm; the resin particles were subjected to pressure spray treatment with sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbent resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate was 1.5wt% of the resin particles;

[0070] (4) Preparation of sulfonated modified lignin:

[0071] Lignin and Na 2 SO 3 The mixture was mixed evenly at a weight ratio of 4:2.5, and a 15% by mass NaOH solution was added, and the mixture was reacted at a temperature of 180° C. for 4 hours to obtain sulfonated modified lignin;

[0072] (5) Mix 30 parts of organic fermentation liquid, 0.5 parts of indolebutyric acid, 0.5 parts of naphthylacetic acid, 0.1 parts of S-absorbent, 2 parts of sodium glutamate and 40 parts of adsorbent filler according to weight parts, and fully adsorb;

[0073] (6) adding 12 parts of a water-absorbing resin by weight, mixing evenly, and then evenly sprinkling 13 parts of a binder on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; wherein the binder is a mixture of polylactic acid, sulfonated modified lignin, polyvinyl alcohol, and γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 12:7:4:1;

[0074] (7) Extruding and granulating the soil nutrient regulator precursor of step (6), adjusting the granulation conditions so that the particle size is controlled at 4 mm, and then drying to obtain the soil nutrient regulator.

[0075] Example 2

[0076] Preparation of soil nutrient regulator for crop cultivation:

[0077] (1) Preparation of organic fermentation broth:

[0078] A1. Starting materials, comprising the following components in parts by weight: 100 parts of feces, 50 parts of berries, 10 parts of garlic straw, 12 parts of pepper straw, 10 parts of tobacco straw, 15 parts of peach leaves, 12 parts of locust leaves, 18 parts of neem leaves, 5 parts of cosmos, 8 parts of morning glory; wherein the berries are mixed with citrus, jujube and watermelon in a weight ratio of 0.5:2:1; garlic straw, pepper straw, tobacco straw, peach leaves, locust leaves, neem leaves, cosmos, morning glory are washed, cut, dried, crushed and sieved through a 1-10 mesh sieve before mixing;

[0079] A2. Adding a composite bacterial strain to the starting material, the amount of the composite bacterial strain added is 0.6% by weight of the starting material; the composite bacterial strain is composed of actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria mixed in a weight ratio of 2:1:4:1:4;

[0080] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 50 parts of biological humic acid fermented in kitchen, 10 parts of quicklime, 0.01 parts of polyaspartic acid, 12 parts of vermiculite powder, 2 parts of zeolite powder, and 15 parts of nitrification inhibitor;

[0081] A4. Back-mixing, fermentation includes early fermentation, mid-fermentation and late fermentation, the fermentation mid-3-5 days of material back-mixing, back-mixing amount of 10% of the starting material, the fermentation was filtered to obtain an organic fermentation broth;

[0082] (2) Preparation of adsorbent filler:

[0083] B1. Volcanic mud, Al 2 O 3 The powder and activated carbon powder are added to the aqueous solution of γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 3:1:1, and ultrasonicated and stirred to prepare a suspension;

[0084] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0085] B3 weighed 30 parts by weight of zeolite particles having a particle size of 1-2mm, 30 parts by weight of coal gangue powder, 30 parts by weight of clay, 8 parts by weight of ammonium bicarbonate, 35 parts by weight of the composite powder, mixed uniformly, added 35 parts by weight of water, granulated to form particles having a particle size of 2-4mm;

[0086] B4. The particles are preheated to 105 ° C, then calcined at 700 ° C, cooled, and prepared as an adsorbent filler;

[0087] (3) Preparation of water-absorbent resin:

[0088] 40 parts of acrylamide, 8 parts of acrylic acid, 0.4 parts of potassium persulfate and 0.03 parts of methylene bisacrylamide were mixed, 0.1 parts of N,N,N',N'-tetramethylethylenediamine were added dropwise, the mixture was mixed evenly, and the mixture was reacted at 30°C for 1 hour; the obtained gel polymer was dried and then crushed into resin particles with an average particle size of 0.1 mm; the resin particles were subjected to pressure spray treatment using sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbent resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate was 1wt% of the resin particles;

[0089] (4) Preparation of sulfonated modified lignin:

[0090] Lignin and Na 2 SO 3 The mixture was mixed evenly at a weight ratio of 5:2, and a 15% by mass NaOH solution was added, and the mixture was reacted at a temperature of 200° C. for 3 h to obtain sulfonated modified lignin;

[0091] (5) 40 parts of organic fermentation liquid, 0.01 parts of indolebutyric acid, 2 parts of naphthylacetic acid, 0.001 parts of S-absorbent, 3 parts of sodium glutamate and 30 parts of adsorbent filler were mixed according to weight parts and fully adsorbed;

[0092] (6) adding 10 parts of a water-absorbing resin by weight, mixing evenly, and then evenly sprinkling 15 parts of an adhesive on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; wherein the adhesive is prepared by mixing polylactic acid, sulfonated modified lignin, polyvinyl alcohol, and γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 10:8:3:2;

[0093] (7) Extruding and granulating the soil nutrient regulator precursor of step (6), adjusting the granulation conditions so that the particle size is controlled at 3 mm, and then drying to obtain the soil nutrient regulator.

[0094] Example 3

[0095] Preparation of soil nutrient regulator for crop cultivation:

[0096] (1) Preparation of organic fermentation broth:

[0097] A1. Starting materials, comprising the following components in parts by weight: 200 parts of feces, 30 parts of berries, 15 parts of garlic straw, 8 parts of pepper straw, 15 parts of tobacco straw, 10 parts of peach leaves, 18 parts of locust leaves, 12 parts of neem leaves, 10 parts of cosmos, 4 parts of morning glory; wherein the berries are mixed with citrus, jujube and watermelon in a weight ratio of 2:0.5:1; garlic straw, pepper straw, tobacco straw, peach leaves, locust leaves, neem leaves, cosmos, morning glory are washed, cut, dried, crushed and sieved through a 1-10 mesh sieve before mixing;

[0098] A2. Adding a composite bacterial strain to the starting material, the amount of the composite bacterial strain added is 1.2% by weight of the starting material; the composite bacterial strain is composed of actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria mixed in a weight ratio of 1:3:1:4:1;

[0099] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 90 parts of biological humic acid fermented in kitchen, 5 parts of quicklime, 0.1 parts of polyaspartic acid, 6 parts of vermiculite powder, 5 parts of zeolite powder, and 10 parts of nitrification inhibitor;

[0100] A4. Back-mixing, fermentation includes early fermentation, mid-fermentation and late fermentation, the fermentation mid-3-5 days of material back-mixing, back-mixing amount of 30% of the starting material, the fermentation was filtered to obtain an organic fermentation broth;

[0101] (2) Preparation of adsorbent filler:

[0102] B1. Volcanic mud, Al 2 O 3 The powder and activated carbon powder are added to the aqueous solution of γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 1:1:1, and ultrasonicated and stirred to prepare a suspension;

[0103] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0104] B3 weighed 40 parts by weight of zeolite particles having a particle size of 1-2mm, 20 parts by weight of coal gangue powder, 40 parts by weight of clay, 4 parts by weight of ammonium bicarbonate, 50 parts by weight of the composite powder, mixed uniformly, added 25 parts by weight of water, granulated to form particles having a particle size of 2-4mm;

[0105] B4. The particles are preheated to 115 ° C, then calcined at 500 ° C, cooled, and prepared as an adsorbent filler;

[0106] (3) Preparation of water-absorbent resin:

[0107] 50 parts of acrylamide, 4 parts of acrylic acid, 0.6 parts of potassium persulfate and 0.02 parts of methylene bisacrylamide were mixed, 0.2 parts of N,N,N',N'-tetramethylethylenediamine were added dropwise, the mixture was mixed evenly, and the mixture was reacted at 5°C for 3 hours; the obtained gel polymer was dried and then crushed into resin particles with an average particle size of 0.05 mm; the resin particles were subjected to pressure spray treatment using sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbent resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate was 2wt% of the resin particles;

[0108] (4) Preparation of sulfonated modified lignin:

[0109] Lignin and Na 2 SO 3 The mixture was mixed evenly in a weight ratio of 3:3, and a 15% by mass NaOH solution was added, and the mixture was reacted at a temperature of 150° C. for 5 h to obtain sulfonated modified lignin;

[0110] (5) Mix 20 parts of organic fermentation liquid, 2 parts of indolebutyric acid, 0.01 parts of naphthylacetic acid, 0.5 parts of S-absorbent, 1 part of sodium glutamate, and 50 parts of adsorbent filler according to weight parts, and fully adsorb;

[0111] (6) adding 15 parts of a water-absorbing resin by weight, mixing evenly, and then evenly sprinkling 10 parts of an adhesive on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; wherein the adhesive is prepared by mixing polylactic acid, sulfonated modified lignin, polyvinyl alcohol, and γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 15:5:5:0.5;

[0112] (7) Extruding and granulating the soil nutrient regulator precursor of step (6), adjusting the granulation conditions so that the particle size is controlled at 5 mm, and then drying to obtain the soil nutrient regulator.

[0113] Example 4

[0114] Preparation of soil nutrient regulator for crop cultivation:

[0115] (1) Preparation of organic fermentation broth:

[0116] A1. Starting materials, comprising the following components in parts by weight: 180 parts of feces, 40 parts of berries, 15 parts of garlic straw, 8 parts of pepper straw, 13 parts of tobacco straw, 11 parts of peach leaves, 16 parts of locust leaves, 17 parts of neem leaves, 6 parts of cosmos, 7 parts of morning glory; wherein the berries are mixed with citrus, jujube and watermelon in a weight ratio of 1:1.4:1; garlic straw, pepper straw, tobacco straw, peach leaves, locust leaves, neem leaves, cosmos, morning glory are washed, cut, dried, crushed and sieved through a 1-10 mesh sieve before mixing;

[0117] A2. Adding a composite bacterial strain to the starting material, the composite bacterial strain added in an amount of 0.8% by weight of the starting material; the composite bacterial strain is composed of actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria mixed in a weight ratio of 1.5:2:1.2:2.6:3.5;

[0118] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 80 parts of biological humic acid fermented in kitchen, 7 parts of quicklime, 0.06 parts of polyaspartic acid, 8 parts of vermiculite powder, 3 parts of zeolite powder, and 13 parts of nitrification inhibitor;

[0119] A4. Back-mixing, fermentation includes early fermentation, mid-fermentation and late fermentation, the fermentation mid-3-5 days of material back-mixing, back-mixing amount of 15% of the starting material, the fermentation was filtered to obtain an organic fermentation broth;

[0120] (2) Preparation of adsorbent filler:

[0121] B1. Volcanic mud, Al 2 O 3 The powder and activated carbon powder are added to the aqueous solution of γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 2:1:1, and ultrasonicated and stirred to prepare a suspension;

[0122] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0123] B3 weighed 35 parts by weight of zeolite particles having a particle size of 1-2mm, 25 parts by weight of coal gangue powder, 36 parts by weight of clay, 5 parts by weight of ammonium bicarbonate, 40 parts by weight of the composite powder, mixed uniformly, added 30 parts by weight of water, granulated to form particles having a particle size of 2-4mm;

[0124] B4. The particles are preheated to 112 ° C, then calcined at 650 ° C, cooled, and prepared as an adsorbent filler;

[0125] (3) Preparation of water-absorbent resin:

[0126] 45 parts of acrylamide, 6 parts of acrylic acid, 0.5 parts of potassium persulfate and 0.03 parts of methylene bisacrylamide were mixed, 0.15 parts of N,N,N',N'-tetramethylethylenediamine were added dropwise, the mixture was mixed evenly, and the mixture was reacted at 15°C for 2 hours; the obtained gel polymer was dried and then crushed into resin particles with an average particle size of 0.07 mm; the resin particles were subjected to pressure spray treatment using sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbent resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate was 1.6wt% of the resin particles;

[0127] (4) Preparation of sulfonated modified lignin:

[0128] Lignin and Na 2 SO 3 The mixture was mixed evenly at a weight ratio of 5:3, and a 15% by mass NaOH solution was added, and the mixture was reacted at a temperature of 170° C. for 4 hours to obtain sulfonated modified lignin;

[0129] (5) Mix 30 parts of organic fermentation liquid, 1 part of indolebutyric acid, 2 parts of sodium glutamate and 40 parts of adsorbent filler according to weight parts, and fully adsorb;

[0130] (6) adding 12 parts of a water-absorbing resin by weight, mixing evenly, and then evenly sprinkling 13 parts of a binder on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; wherein the binder is a mixture of polylactic acid, sulfonated modified lignin, polyvinyl alcohol, and γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 11:6:4:1;

[0131] (7) Extruding and granulating the soil nutrient regulator precursor of step (6), adjusting the granulation conditions so that the particle size is controlled at 4 mm, and then drying to obtain the soil nutrient regulator.

[0132] Comparative Example 1

[0133] Preparation of soil nutrient regulator for crop cultivation:

[0134] (1) Preparation of organic fermentation broth:

[0135] A1. Starting materials, comprising the following components in parts by weight: 150 parts of feces, 40 parts of berries, 12 parts of garlic straw, 10 parts of pepper straw, 13 parts of tobacco straw, 12 parts of peach leaves, 16 parts of locust leaves, 14 parts of neem leaves, 7 parts of cosmos, 6 parts of morning glory; wherein the berries are mixed with citrus, jujube and watermelon in a weight ratio of 1.2:1.5:1; garlic straw, pepper straw, tobacco straw, peach leaves, locust leaves, neem leaves, cosmos, morning glory are washed, cut, dried, crushed and sieved through a 1-10 mesh sieve before mixing;

[0136] A2. Adding a composite bacterial strain to the starting material, the amount of the composite bacterial strain added is 1% by weight of the starting material; the composite bacterial strain is composed of actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria mixed in a weight ratio of 2:2:3:2:3;

[0137] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 70 parts of biological humic acid fermented in kitchen, 8 parts of quicklime, 0.05 parts of polyaspartic acid, 9 parts of vermiculite powder, 4 parts of zeolite powder, and 12 parts of nitrification inhibitor;

[0138] A4. Back-mixing, fermentation includes early fermentation, mid-fermentation and late fermentation, the fermentation mid-3-5 days of material back-mixing, back-mixing amount of 20% of the starting material, the fermentation was filtered to obtain an organic fermentation broth;

[0139] (2) Preparation of adsorbent filler:

[0140] B1. The activated carbon powder was added to an aqueous solution of γ-glycidyloxypropyltrimethoxysilane, ultrasonicated and stirred to prepare a suspension;

[0141] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0142] B3 weighed 35 parts by weight of zeolite particles having a particle size of 1-2mm, 25 parts by weight of coal gangue powder, 35 parts by weight of clay, 6 parts by weight of ammonium bicarbonate, 42 parts by weight of the composite powder, mixed uniformly, added 30 parts by weight of water, granulated to form particles having a particle size of 2-4mm;

[0143] B4. The particles are preheated to 110 ° C, then calcined at 650 ° C, cooled, and prepared as an adsorbent filler;

[0144] (3) Preparation of water-absorbent resin:

[0145] 45 parts of acrylamide, 6 parts of acrylic acid, 0.5 parts of potassium persulfate and 0.02 parts of methylene bisacrylamide were mixed, and 0.15 parts of N,N,N',N'-tetramethylethylenediamine were added dropwise, mixed evenly, and reacted at a temperature of 20°C for 2 hours; the obtained gel polymer was dried and then crushed into resin particles with an average particle size of 0.05 mm; the resin particles were subjected to pressure spray treatment with sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbent resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate was 1.5wt% of the resin particles;

[0146] (4) Preparation of sulfonated modified lignin:

[0147] Lignin and Na 2 SO 3The mixture was mixed evenly at a weight ratio of 4:2.5, and a 15% by mass NaOH solution was added, and the mixture was reacted at a temperature of 180° C. for 4 hours to obtain sulfonated modified lignin;

[0148] (5) Mix 30 parts of organic fermentation liquid, 0.5 parts of indolebutyric acid, 0.5 parts of naphthylacetic acid, 0.1 parts of S-absorbent, 2 parts of sodium glutamate and 40 parts of adsorbent filler according to weight parts, and fully adsorb;

[0149] (6) adding 12 parts of a water-absorbing resin by weight, mixing evenly, and then evenly sprinkling 13 parts of a binder on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; wherein the binder is a mixture of polylactic acid, sulfonated modified lignin, polyvinyl alcohol, and γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 12:7:4:1;

[0150] (7) Extruding and granulating the soil nutrient regulator precursor of step (6), adjusting the granulation conditions so that the particle size is controlled at 4 mm, and then drying to obtain the soil nutrient regulator.

[0151] Comparative Example 2

[0152] Preparation of soil nutrient regulator for crop cultivation:

[0153] (1) Preparation of organic fermentation broth:

[0154] A1. Starting materials, comprising the following components in parts by weight: 150 parts of feces, 40 parts of berries, 12 parts of garlic straw, 10 parts of pepper straw, 13 parts of tobacco straw, 12 parts of peach leaves, 16 parts of locust leaves, 14 parts of neem leaves, 7 parts of cosmos, 6 parts of morning glory; wherein the berries are mixed with citrus, jujube and watermelon in a weight ratio of 1.2:1.5:1; garlic straw, pepper straw, tobacco straw, peach leaves, locust leaves, neem leaves, cosmos, morning glory are washed, cut, dried, crushed and sieved through a 1-10 mesh sieve before mixing;

[0155] A2. Adding a composite bacterial strain to the starting material, the amount of the composite bacterial strain added is 1% by weight of the starting material; the composite bacterial strain is composed of actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria mixed in a weight ratio of 2:2:3:2:3;

[0156] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 70 parts of biological humic acid fermented in kitchen, 8 parts of quicklime, 0.05 parts of polyaspartic acid, 9 parts of vermiculite powder, 4 parts of zeolite powder, and 12 parts of nitrification inhibitor;

[0157] A4. Back-mixing, fermentation includes early fermentation, mid-fermentation and late fermentation, the fermentation mid-3-5 days of material back-mixing, back-mixing amount of 20% of the starting material, the fermentation was filtered to obtain an organic fermentation broth;

[0158] (2) Preparation of adsorbent filler:

[0159] B1. Volcanic mud, Al 2 O 3 The powder and activated carbon powder are added to the aqueous solution of γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 2:1:1, and ultrasonicated and stirred to prepare a suspension;

[0160] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0161] B3 weighed 35 parts by weight of zeolite particles having a particle size of 1-2mm, 25 parts by weight of coal gangue powder, 35 parts by weight of clay, 6 parts by weight of ammonium bicarbonate, 42 parts by weight of the composite powder, mixed uniformly, added 30 parts by weight of water, granulated to form particles having a particle size of 2-4mm;

[0162] B4. The particles are preheated to 110 ° C, then calcined at 650 ° C, cooled, and prepared as an adsorbent filler;

[0163] (3) Preparation of water-absorbent resin:

[0164] 45 parts of acrylamide, 6 parts of acrylic acid, 0.5 parts of potassium persulfate and 0.02 parts of methylene bisacrylamide were mixed, and 0.15 parts of N,N,N',N'-tetramethylethylenediamine were added dropwise, mixed evenly, and reacted at a temperature of 20°C for 2 hours; the obtained gel polymer was dried and then crushed into resin particles with an average particle size of 0.05 mm; the resin particles were subjected to pressure spray treatment with sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbent resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate was 1.5wt% of the resin particles;

[0165] (4) Mix 30 parts of organic fermentation liquid, 0.5 parts of indolebutyric acid, 0.5 parts of naphthylacetic acid, 0.1 parts of S-absorbent, 2 parts of sodium glutamate and 40 parts of adsorbent filler according to weight parts, and fully adsorb;

[0166] (5) adding 12 parts of a water-absorbing resin by weight, mixing evenly, and then evenly sprinkling 13 parts of a binder on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; wherein the binder is a mixture of polylactic acid, polyvinyl alcohol, and γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 12:4:1;

[0167] (6) Extruding and granulating the soil nutrient regulator precursor of step (5), adjusting the granulation conditions so that the particle size is controlled at 4 mm, and then drying to obtain the soil nutrient regulator.

[0168] Comparative Example 3

[0169] Preparation of soil nutrient regulator for crop cultivation:

[0170] (1) Preparation of organic fermentation broth:

[0171] A1. Starting materials, comprising the following components in parts by weight: 150 parts of feces, 40 parts of berries, 12 parts of garlic straw, 10 parts of pepper straw, 13 parts of tobacco straw, 12 parts of peach leaves, 16 parts of locust leaves, 14 parts of neem leaves, 7 parts of cosmos, 6 parts of morning glory; wherein the berries are mixed with citrus, jujube and watermelon in a weight ratio of 1.2:1.5:1; garlic straw, pepper straw, tobacco straw, peach leaves, locust leaves, neem leaves, cosmos, morning glory are washed, cut, dried, crushed and sieved through a 1-10 mesh sieve before mixing;

[0172] A2. Adding a composite bacterial strain to the starting material, the amount of the composite bacterial strain added is 1% by weight of the starting material; the composite bacterial strain is composed of actinomycetes, yeast, Bacillus subtilis, white rot fungi, and nitrogen-fixing bacteria mixed in a weight ratio of 2:2:3:2:3;

[0173] A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 70 parts of biological humic acid fermented in kitchen, 8 parts of quicklime, 0.05 parts of polyaspartic acid, 9 parts of vermiculite powder, 4 parts of zeolite powder, and 12 parts of nitrification inhibitor;

[0174] A4. Back-mixing, fermentation includes early fermentation, mid-fermentation and late fermentation, the fermentation mid-3-5 days of material back-mixing, back-mixing amount of 20% of the starting material, the fermentation was filtered to obtain an organic fermentation broth;

[0175] (2) Preparation of adsorbent filler:

[0176] B1. Volcanic mud, Al 2 O 3 The powder and activated carbon powder are added to the aqueous solution of γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 2:1:1, and ultrasonicated and stirred to prepare a suspension;

[0177] B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder;

[0178] B3 weighed 35 parts by weight of zeolite particles having a particle size of 1-2mm, 25 parts by weight of coal gangue powder, 35 parts by weight of clay, 6 parts by weight of ammonium bicarbonate, 42 parts by weight of the composite powder, mixed uniformly, added 30 parts by weight of water, granulated to form particles having a particle size of 2-4mm;

[0179] B4. The particles are preheated to 110 ° C, then calcined at 650 ° C, cooled, and prepared as an adsorbent filler;

[0180] (3) Preparation of water-absorbent resin:

[0181] 45 parts of acrylamide, 6 parts of acrylic acid, 0.5 parts of potassium persulfate and 0.02 parts of methylene bisacrylamide were mixed, and 0.15 parts of N,N,N',N'-tetramethylethylenediamine were added dropwise, mixed evenly, and reacted at a temperature of 20°C for 2 hours; the obtained gel polymer was dried and then crushed into resin particles with an average particle size of 0.05 mm; the resin particles were subjected to pressure spray treatment with sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbent resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate was 1.5wt% of the resin particles;

[0182] (4) Preparation of sulfonated modified lignin:

[0183] Lignin and Na 2 SO 3 The mixture was mixed evenly at a weight ratio of 4:2.5, and a 15% by mass NaOH solution was added, and the mixture was reacted at a temperature of 180° C. for 4 hours to obtain sulfonated modified lignin;

[0184] (5) Mix 30 parts of organic fermentation liquid, 0.5 parts of indolebutyric acid, 0.5 parts of naphthylacetic acid, 0.1 parts of S-absorbent and 40 parts of adsorbent filler according to weight parts, and fully adsorb;

[0185] (6) adding 12 parts of a water-absorbing resin by weight, mixing evenly, and then evenly sprinkling 13 parts of a binder on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; wherein the binder is a mixture of polylactic acid, sulfonated modified lignin, polyvinyl alcohol, and γ-glycidyloxypropyltrimethoxysilane in a weight ratio of 12:7:4:1;

[0186] (7) Extruding and granulating the soil nutrient regulator precursor of step (6), adjusting the granulation conditions so that the particle size is controlled at 4 mm, and then drying to obtain the soil nutrient regulator.

[0187] Experimental example

[0188] The soil nutrient regulators for crop planting prepared in Examples 1-4 and Comparative Examples 1-3 were applied to different farmlands in the same village, and young tomato plants with similar growth conditions and plant height of 5 cm were selected and planted in the above farmlands to which the soil nutrient regulators for crop planting prepared in Examples 1-4 and Comparative Examples 1-3 were applied. 20 tomato plants were planted in each farmland, watered once a week, and the soil moisture content was measured before the last watering in 4 weeks. The plant height was tested after the last watering in 4 weeks, and the leaf photosynthesis rate was tested with a portable photosynthesis meter at 13:00 the next afternoon. The test leaves were healthy leaves from similar parts of the plants. At the same time, the oxygen content in the soil was measured using a portable soil oxygen content meter, and the organic matter content in the soil of each farmland was measured using the potassium dichromate volumetric method. The measured data of tomatoes planted in each farmland were averaged, and the results are shown in Table 1.

[0189] Table 1

[0190]

[0191] It can be seen from Table 1 that after the soil nutrient regulators for crop planting prepared in Examples 1-4 of the present application are applied to the soil, the soil contains rich nutrients, improves soil compaction, increases the oxygen content and water content in the soil, can promote the growth of tomato plants, and accelerate the photosynthesis rate of the plants.

[0192] The raw materials for preparing the adsorbent filler in Comparative Example 1 do not use volcanic mud and Al 2 O 3 The soil nutrient regulator prepared in Comparative Example 1 for crop cultivation has a fertilizer effect that is significantly inferior to that of Example 1 of the present application. The organic matter content in the soil is low, and the oxygen content and water content in the soil also decrease, indicating that the electrostatic attraction effect of the volcanic mud in the adsorbent filler of the present application, Al 2 O 3 The combination of the porous flocculation effect and the adsorption effect of activated carbon is more conducive to the attachment of microorganisms to the inside of the filler and improves their biological activity, thereby improving fertilizer efficiency, improving soil compaction and promoting plant growth.

[0193] No sulfonated modified lignin is used in the raw materials of the adhesive in Comparative Example 2, and the rest is the same as Example 1. The fertilizer effect of the soil nutrient regulator for crop planting prepared in Comparative Example 1 is obviously not as good as that in Example 1 of the present application. The organic matter content in the soil is low, and the oxygen content and water content in the soil also decrease, indicating that the lignin of the present application has rich active functional groups such as phenolic hydroxyl groups, which give it strong chemical reactivity and bonding properties. After sulfonation modification, the dispersibility and compatibility of lignin in polylactic acid emulsion are improved, and the bonding properties of the adhesive are further enhanced, thereby improving the fertilizer effect and the effect of soil improvement.

[0194] No sodium glutamate is used in the preparation raw materials of Comparative Example 3, and the rest are the same as Example 1. The plant height and leaf photosynthesis rate of the soil nutrient regulator for crop cultivation prepared in Comparative Example 1 are significantly inferior to those in Example 1 of the present application, indicating that the sodium glutamate of the present application can combine with calcium ions in the soil to form calcium glutamate, promote soil colloid coagulation, make the soil loose and breathable, and be beneficial to the growth of crop roots; at the same time, sodium glutamate can also promote the reproduction and activity of microorganisms in the soil, increase soil fertility, provide sufficient nutrition for crops, promote plant root development and chlorophyll synthesis, thereby accelerating the growth rate of plants.

[0195] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions or variations may be made to the embodiments without departing from the principles and purpose of the present application, and that the technical solutions after these changes, modifications, substitutions or variations will fall within the scope of protection of the present application.

Claims

1. A soil nutrient regulator for crop planting, characterized in that: The preparation comprises the following raw materials in parts by weight: 20-40 parts of organic fermentation liquid, 1-3 parts of sodium glutamate, 30-50 parts of adsorptive filler, 10-15 parts of water-absorbent resin, and 10-15 parts of adhesive; Wherein, the raw material for preparation further contains at least one of 0.01-2 parts of indolebutyric acid, 0.01-2 parts of naphthylacetic acid or 0.001-0.5 parts of S-inducible in parts by weight; The adhesive is prepared by mixing polylactic acid, sulfonated modified lignin, polyvinyl alcohol and silane coupling agent in a weight ratio of (10-15):(5-8):(3-5):(0.5-2); The preparation method of the sulfonated modified lignin comprises the following steps: The lignin and Na2SO3 are mixed uniformly in a weight ratio of (3-5): (2-3), and a 15% by mass NaOH solution is added, and the mixture is reacted at a temperature of 150-200° C. for 3-5 hours to obtain sulfonated modified lignin; The preparation method of the adsorbent filler comprises the following steps: B1. Add volcanic mud, Al2O3 powder and activated carbon powder to an aqueous solution of a silane coupling agent, ultrasonicate and stir to prepare a suspension; B2. Carboxyethyl cellulose is added to the suspension to prepare a slurry, which is then dried and ground to form a composite powder; B3 weighed zeolite particles 30-40 parts by weight, 20-30 parts by weight of gangue powder, 30-40 parts by weight of clay, 4-8 parts by weight of ammonium bicarbonate, 35-50 parts by weight of the composite powder, mixed uniformly, added 25-35 parts by weight of water, granulated to form particles; B4. The particles are preheated to 105-115°C, calcined at 500-700°C, and cooled to prepare an adsorptive filler.

2. A soil nutrient regulator for crop planting according to claim 1, characterized in that: In step B1, the weight ratio of the Al2O3 powder to the volcanic mud and the activated carbon powder is (1-3):1:

1.

3. A soil nutrient regulator for crop planting according to claim 1, characterized in that: The particle size of the particles in step B3 is 2-4 mm.

4. A soil nutrient regulator for crop planting according to claim 1, characterized in that: The method for preparing the organic fermentation liquid comprises the following steps: A1. Starting materials, comprising the following components in parts by weight: 100-200 parts of feces, 30-50 parts of berries, 10-15 parts of garlic straw, 8-12 parts of pepper straw, 10-15 parts of tobacco straw, 10-15 parts of peach leaves, 12-18 parts of locust leaves, 12-18 parts of neem leaves, 5-10 parts of cosmos, 4-8 parts of morning glory; A2. Adding a composite strain to the starting material, wherein the composite strain is added in an amount of 0.6-1.2% by weight of the starting material; A3. Adding a fermentation function enhancer, the fermentation function enhancer comprises the following components in parts by weight: 50-90 parts of biological humic acid fermented in kitchen, 5-10 parts of quicklime, 0.01-0.1 parts of polyaspartic acid, 6-12 parts of vermiculite powder, 2-5 parts of zeolite powder, and 10-15 parts of nitrification inhibitor; A4. Back-mixing. Fermentation includes the initial fermentation, the middle fermentation and the late fermentation. The materials of the middle fermentation period of 3-5 days are back-mixed. The back-mixing amount is 10-30% of the starting material. The fermented material is filtered to obtain an organic fermentation liquid.

5. A soil nutrient regulator for crop planting according to claim 4, characterized in that: The composite bacterial strains in step A2 include at least one of actinomycetes, yeast, Bacillus subtilis, white rot fungi, nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria, and lactic acid bacteria.

6. A soil nutrient regulator for crop planting according to claim 4, characterized in that: The berries in step A1 include at least one of apples, oranges, pears, dates, persimmons, grapes, and watermelons.

7. The soil nutrient regulator for crop planting according to claim 1, characterized in that: The preparation method of the water-absorbent resin comprises the following steps: 40-50 parts of acrylamide, 4-8 parts of acrylic acid, 0.4-0.6 parts of potassium persulfate and 0.02-0.03 parts of methylene bisacrylamide are mixed, and 0.1-0.2 parts of N,N,N',N'-tetramethylethylenediamine are added dropwise, mixed evenly, and reacted for 1-3 hours; the obtained gel polymer is dried and then crushed into resin particles; the resin particles are subjected to pressure spray treatment with sodium hexadecyl diphenyl oxide disulfonate to obtain a water-absorbing resin, wherein the amount of sodium hexadecyl diphenyl oxide disulfonate is 1-2wt% of the resin particles.

8. The soil nutrient regulator for crop planting according to claim 7, characterized in that: The reaction temperature is 5-30°C.

9. The soil nutrient regulator for crop planting according to claim 7, characterized in that: The average particle size of the resin particles is 0.05-0.1 mm.

10. A method for preparing a soil nutrient regulator for crop planting according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) mixing at least one of indolebutyric acid, naphthylacetic acid, and S-inducible protein with an organic fermentation liquid, sodium glutamate, and an adsorbent filler according to weight parts for sufficient adsorption; (2) adding a water-absorbing resin according to parts by weight, mixing uniformly, and then evenly spreading a binder on the surface of the mixed raw materials to obtain a soil nutrient regulator precursor; (3) Extruding and granulating the soil nutrient regulator precursor of step (2), adjusting the granulation conditions so that the particle size is controlled at 3-5 mm, and then drying to obtain the soil nutrient regulator.

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