73 results about "PHOSPHORUS/POTASSIUM" patented technology

The invention relates to the technical field of intelligent control, in particular to a monopotassium phosphate intelligent control method and system.The method comprises the following steps that rhizosphere phosphorus and potassium concentration changes are obtained, whether the rhizosphere phosphorus and potassium concentration changes are in a critical rate interval or not is judged, an effective absorption time period identifier is generated, and an organ amplification ratio is analyzed to judge a cooperation period; and extracting a stalk concentration ratio, comparing the stalk concentration ratio with a reference interval to generate an application inhibition identifier, fusing information to judge a fertilization window, adjusting the concentration according to the root hair amplification and the water consumption rate, and generating a control instruction set. According to the method, the effective time period of phosphorus and potassium nutrient absorption of the crops is determined through crop rhizosphere phosphorus and potassium ion concentration difference calculation and average treatment, the objective interval of crop nutrient absorption rate indexes is defined, blind fertilization is avoided, the pertinence and accuracy of nutrient absorption and utilization of the crops are enhanced, the excessive application state of nutrient elements is dynamically identified, and the crop quality is improved. The risk of excessive nutrients caused by nutrient enrichment of crops is prevented, and resource waste and environmental burden are effectively reduced.

The present invention relates to a method for decomposing and utilizing phosphate-potassium ore, belonging to the technical field of phosphate-potassium ore treatment. The technical problem solved by the present invention is to provide a method for decomposing and utilizing phosphate-potassium ore. The method comprises the following steps: mixing nitric acid and phosphate-potassium ore, and carrying out an acidolysis reaction; after the reaction is completed, performing solid-liquid separation to obtain a phosphorus-containing filtrate and potassium-containing acid-insoluble substances; wherein, the leaching rate of potassium in the phosphate-potassium ore is ≤3%, and the leaching rate of phosphorus is ≥96%. The present invention for the first time uses nitric acid to treat phosphate-potassium ore, controls the reaction conditions of the acidolysis process to reduce the leaching rate of K element, realizes the separation of phosphorus and potassium elements, avoids the problem that potassium fluorosilicate precipitates and clogs the filter cloth during vacuum filtration and cooling, perfectly avoids the disadvantages of the traditional wet-process phosphoric acid for treating phosphate-potassium ore, and has rich products.

The invention discloses a quaternary synergistic water-soluble fertilizer synergist as well as a preparation method and application thereof, and realizes deep coupling of chemical growth promotion, biological activation and physical slow release, multi-component synergistic interaction and efficient nutrient utilization based on a four-dimensional synergistic mechanism of chitosan oligosaccharide-oligopeptide-bioactive alkali-functional microbial agent. Wherein the modified chitosan oligosaccharide enhances the chelating ability through molecular structure optimization, and forms a nano-scale composite system with the oligopeptide, so that the absorption and transfer efficiency of nutrients on leaf surfaces and root systems is remarkably improved. The functional microbial agent and chitosan oligosaccharide cooperate to activate soil enzyme activity and promote release of insoluble phosphorus and potassium, so that the utilization rate of nitrogen, phosphorus and potassium is remarkably increased compared with that of a traditional fertilizer, and nutrient loss is effectively reduced. The quaternary synergistic water-soluble fertilizer synergist provided by the invention is high in compatibility, can be directly compounded with a commercially available water-soluble fertilizer for use, is suitable for diversified planting scenes of facility agriculture, field crops and commercial crops, and has large-scale popularization potential.

The invention discloses a preparation method of a liquid bio-fertilizer for sequestration of carbon by using microalgae. The preparation method comprises the following steps: S1, preparing components of the liquid bio-fertilizer for sequestration of carbon by using microalgae in parts by mass; s2, pretreating the raw materials; s3, carrying out a mixed reaction; step S4, carrying out homogenization treatment; s5, detecting and adjusting; and step S6, packaging a finished product. Nitrogen, phosphorus, potassium and other basic nutrients in the fertilizer and medium trace elements (calcium, magnesium, iron and zinc) form a basic nutrition system, and the microalgae carbon sequestration polysaccharide, the modified humic acid-microalgae protein compound and the nanoscale phosphorus-potassium chelate further achieve synergistic-slow release-targeted supply of the nutrients. The liquid biological fertilizer is long in fertilizer efficiency lasting period, reduces the fertilization frequency in the growth period of crops, and reduces the fertilization cost and labor intensity of farmers.

The application discloses a superoxide dismutase biological anti-stress nutrient fertilizer based on plant extraction and a production method thereof. The fertilizer contains, in percentage by mass, 1.0-10.0% of superoxide dismutase, 1.0-5.0% of a plant anti-stress inducing factor complex, 0.1-2.0% of organic chelated trace elements, 5.0-15.0% of a phosphorus-potassium enhancing component, 0.5-5.0% of a natural protective agent, 3.0-10.0% of a penetrating agent, 0.5-15.0% of a microbial metabolic synergist, 0.1-5.0% of a pH buffer component, 0.01-0.5% of a plant-derived preservative, and the balance of water. The superoxide dismutase is preferably derived from corn germ or spinach extract. The production method comprises the steps of enzyme activity component preparation, water phase base preparation, anti-stress function phase preparation, step-by-step mixing and primary stabilization, final product integration and secondary stabilization, and the like. Through scientific compounding and synergy of various biological active components, the application significantly enhances the resistance of crops to drought, saline-alkali, high and low temperature and the like, and promotes growth and quality improvement.

This invention relates to the field of fertilizer technology, specifically to a disease-resistant microbial compound fertilizer and its preparation method. The disease-resistant microbial compound fertilizer comprises the following raw materials in parts by weight: 10-15 parts nitrogen fertilizer, 10-20 parts phosphorus fertilizer, 6-10 parts potassium fertilizer, 50-70 parts fermented organic matter, 8-12 parts fertilizer efficiency enhancer, 5-8 parts disease-resistant composition, and 6-10 parts chitosan oligosaccharide. The disease-resistant composition is a mixture of sodium selenite and potassium humate in a weight ratio of 1:1.5-2.5. The microbial compound fertilizer prepared by this invention not only achieves a combination of rapid and long-lasting effects, improving fertilizer utilization, but also increases organic matter, activates fixed phosphorus and potassium elements in the soil, and improves the micro-ecological environment. Furthermore, through the synergistic effect of Trichoderma harzianum inoculum, Paecilomyces lilacinus, the disease-resistant composition, and chitosan oligosaccharide, it exhibits good inhibitory effects on soil-borne diseases and some foliar diseases, promoting robust crop growth and improving both crop yield and quality.

This invention relates to the field of microbial fertilizer technology, specifically to a microbial compound phosphorus and potassium fertilizer that promotes nutrient absorption and its preparation method. The preparation method of a microbial compound phosphorus and potassium fertilizer that promotes nutrient absorption includes: preparing sunflower disc extract and Moringa leaf extract; preparing slow-release microcapsules; preparing microspheres loaded with bacteria; and preparing the compound phosphorus and potassium fertilizer. This invention first selectively oxidizes konjac glucomannan using sodium periodate, then crosslinks the oxidized konjac glucomannan with lignin under weakly acidic conditions to form a three-dimensional network crosslinked polymer framework. Urea and dipotassium hydrogen phosphate are encapsulated in the network channels or adsorbed onto the framework during the crosslinking process, forming nutrient-loaded slow-release microcapsules. After the slow-release microcapsules are made into a compound phosphorus and potassium fertilizer and applied, nutrients are gradually released as the crop grows, which helps improve nutrient absorption and utilization, thereby promoting nutrient absorption.

1.The name of the design product: fertilizer bottle (seaweed mineral source potassium phosphate concentrate stock solution). 2.The use of the design product: the design product is used for packaging fertilizer bottles. 3.The design points of the design product: the combination of shape, pattern and color. 4.The picture or photo that best indicates the design points: front view. 5.The design for which protection is sought contains color.

The invention discloses a novel acetonitrile catalyst and a preparation method thereof, and belongs to the field of chemical catalysts. The catalyst provided by the invention takes nano-scale porous carbon as a carrier and zirconium-tungsten bimetal as an active component, an acid path is synergistically inhibited through phosphorus-potassium elements, and acetone is prevented from being generated by acetic acid decarboxylation; and cerium-molybdenum is utilized to regulate and control an ammoniation path, and the directional reaction of acetic acid and NH3 is accelerated. The catalyst provided by the invention promotes the yield of acetonitrile to reach 99% or above, and the conversion rate reaches 99.99%; the generation amount of acetone is only 0.1 mol%. And the catalyst can keep high activity and selectivity for a long time, and can be revived and used for multiple times, so that the service life is prolonged.

This application relates to the field of agricultural microbiology technology, and in particular to a multifunctional phosphate-solubilizing and potassium-solubilizing bacterium WZX-PKB-1 and its applications. The multifunctional phosphate-solubilizing and potassium-solubilizing bacterium WZX-PKB-1 is classified and named... Priestia sp. WZX-PKB-1 was deposited at the Guangdong Provincial Center for Microbial Culture Collection on January 28, 2026, with accession number GDMCC NO: 67763. WZX-PKB-1 exhibits significant tolerance to multiple abiotic stresses, including high temperature, salinity, drought, and mixed heavy metals, and demonstrates effective phosphorus and potassium release capacity under these conditions, making it suitable for desert soil improvement and ecological restoration.

The invention discloses a method for preparing an organic fertilizer by using straws, which comprises the following steps: preparing materials: taking 50-100 parts by weight of straws, 20-30 parts by weight of animal waste, 10-30 parts by weight of high-sugar corn kernels, 20-30 parts by weight of mildewed sugarcane, 5-10 parts by weight of microbial inoculum and 20-60 parts by weight of water; and a crushing step: crushing the straws by using a crusher, and crushing the mildewed sugarcanes. The straw, the mildewed sugarcane and the high-sugar corn kernels are subjected to composting fermentation together, so that the mildewed sugarcane is reused, sugar in the sugarcane and the high-sugar corn kernels can provide rich nutrition for fermentation, the prepared organic fertilizer is high in fermentation speed and good in fermentation effect, and the animal waste is added, so that the organic fertilizer is environment-friendly. After the animal manure contains abundant organic matters and nitrogen elements and is mixed with the straws, the carbon-nitrogen ratio of the compost can be adjusted, the microbial activity is promoted, the fermentation process is accelerated, the composting period is shortened, and trace elements such as phosphorus and potassium are provided, so that the organic fertilizer is richer in nutrition.

The invention discloses a high-organic-matter biological matrix and a preparation method thereof. The biological matrix is prepared from the following components in percentage by mass: 20% of imported peat, 30% of coco coir, 30% of a fermented material consisting of tobacco powder and livestock and poultry manure, and 20% of perlite. The preparation method comprises the following steps: uniformly mixing tobacco powder, livestock and poultry manure, imported peat and coco coir, composting and fermenting for not less than 45 days, controlling the temperature not to exceed 72 DEG C, crushing, screening, storing and cooling, adding microbial strains, and carrying out anaerobic fermentation in a packaging bag for 7 days; the organic matter content of the obtained biological matrix exceeds 45%, and the biological matrix can effectively loosen soil, promote crop root growth and release phosphorus and potassium elements in soil, can be used for field crop and vegetable seedling raising and the like, and has the advantages of being safe, environmentally friendly and remarkable in soil improvement effect.

The invention relates to the technical field of fertilizer production and industrial solid waste resource utilization, and particularly discloses a method for producing a urea formaldehyde polyglutamic acid compound fertilizer from phosphorus and potassium mixed acid raffinate. According to the method, phosphorus-potassium mixed acid slurry, polyglutamic acid and urea formaldehyde are used as main raw materials, and the preparation method comprises the steps of raw material reaction and mixed acid preparation, multi-stage neutralization and functional agent mixing, slow-release nitrogen source mixing, returned material pretreatment and granulation, screening and wrapping, process waste heat recovery and the like. The product disclosed by the invention can be applied as a special compound fertilizer with nutrient slow release and biological stimulation functions, and has the advantages of balanced nutrients, high utilization rate and capability of improving soil. Besides, according to the preparation method, high-valued resource utilization of the phosphorus-potassium mixed acid raffinate is achieved, and through ammoniation pretreatment of returned materials and systematic recovery of reaction waste heat, the preparation method has the advantages that the raw material cost is reduced, the product performance is improved, and the production energy consumption is reduced.

The invention relates to the technical field of soil fertility improvement, and discloses a soil fertility improvement method for supplementing cultivated land soil. The soil fertility improvement method comprises the following steps: S1, applying a base fertilizer I in a wheat season, and dressing a quick-acting inorganic nitrogen fertilizer or a phosphorus-potassium compound fertilizer; s2, after wheat is harvested, straws are separated from the field, and wheat stubbles are ploughed after a decomposition agent is added; s3, base fertilizer II is applied in the soybean season, and quick-acting inorganic nitrogen fertilizer and phosphorus-potassium compound fertilizer are topdressed; s4, after the soybeans are harvested, straw is separated from the field, and stubbles are smashed and returned to the field; wherein in the step S1, the base fertilizer I comprises decomposed manure and a potassium sulfate type compound fertilizer; in the step S2, the base fertilizer II comprises decomposed manure, a quick-acting inorganic nitrogen fertilizer, a water-soluble phosphate fertilizer and a potash fertilizer; in the base fertilizer I and the base fertilizer II, the decomposed manure is prepared by fermenting animal manure, straws, mushroom residues and a complex microbial inoculant. By means of the soil fertility improving method, the nutrient indexes such as soil organic matter and total nitrogen can be obviously improved, and the good soil fertility improving effect is achieved.

This invention discloses a Fe 3+ This invention relates to an anchored phosphorus and potassium-doped tubular carbon nitride composite photo-Fenton catalytic material, its preparation method, and its application, belonging to the field of emerging pollutant degradation. The catalytic material in this invention is produced using Fe... 3+ It is formed by anchoring tubular carbon nitride doped with phosphorus and potassium; wherein, the Fe in the catalyst material 3+ The anchoring amount is 1wt% to 9wt%. The preparation method provided by this invention is simple, easy to implement, has good repeatability, and high yield. The obtained iron ions are uniformly distributed in the graphitic phase carbide ring network and will not be oxidized, effectively avoiding the problems of easy oxidation and uneven distribution of iron ions. This catalytic material has good performance and strong versatility, and can be used in the field of water pollution degradation and purification.

The invention relates to a blueberry culture medium and a preparation method of the blueberry culture medium. The blueberry culture medium is prepared from, by volume, 40%-50% of decomposed organic matter, 20%-30% of natural mineral structuring agent, 5%-10% of biochar, 10%-15% of peat soil, 4%-6% of functional additive, 1%-2% of microbial agent and 0%-10% of rural soil. The core raw material decomposed organic matter is derived from agricultural waste, the cost is low, waste can be turned into wealth, and expensive peat soil is saved. The natural mineral structuring agent retains water and fertilizer, has an excellent physical structure, ensures the looseness and air permeability of the blueberry culture medium, and is beneficial to the growth of blueberry root systems. The functional additive enables the blueberry culture medium to maintain stable acidity and can provide mineral nutrition. The microbial agent can activate phosphorus, potassium and other elements in soil, fix nitrogen, generate plant stimulant for promoting growth, inhibit soil-borne diseases and form a healthy rhizosphere microecosystem.

The present invention provides bamboo charcoal in which phosphorus (P), potassium (K), or ash content is increased while effectively reducing chlorine (Cl). [Solution] The bamboo charcoal according to the present invention has a chlorine content ratio of 0.05 or less to potassium. Furthermore, the bamboo charcoal according to the present invention has a chlorine content ratio of 0.2 or less to phosphorus. Furthermore, the bamboo charcoal according to the present invention has a chlorine content ratio of 0.05 or less to ash.

The invention relates to application of bacillus altitudinis B6 with phosphorus and potassium solubilizing and growth promoting functions in promoting the growth of eucalyptus. The strain has various phosphorus and potassium dissolving capacities, activates insoluble phosphorus and potassium in soil, promotes absorption of inorganic phosphorus by plants, improves nutrients of phosphorus and potassium in the plants, also has IAA production capacity, promotes plant root development and plant growth, and has a remarkable growth promoting effect. In the application process, the strain is pollution-free, residue-free and biologically environment-friendly, is a growth-promoting strain with a good application prospect in the field of plant growth promotion, and has an excellent application prospect.

The invention relates to the technical field of fertilizers, in particular to an enzyme preparation high-activity loss-resistant double-effect chelate fertilizer and a preparation method thereof. The chelate fertilizer comprises the following raw materials in parts by weight: 40-60 parts of urea, 20-30 parts of fulvic acid, 10-20 parts of potassium chloride, 3-6 parts of filler, 2-4 parts of a chelating agent, 1-2 parts of a compound enzyme preparation and 0.6-1 part of an active agent. Through synergistic embedding of the fiber material and the auxiliary material, a stable microenvironment is provided for the compound enzyme preparation in the chelate fertilizer, the high activity of the compound enzyme preparation in the fertilizer processing process is ensured, and then the finally obtained chelate fertilizer can continuously and effectively activate fixed nutrients such as phosphorus and potassium after being applied to soil, so that the soil quality is improved. The utilization efficiency and the lasting period of the fertilizer are obviously improved.

The present application relates to a kind of planting roof structure of biochar modified recycled concrete substrate and its preparation method, planting roof structure includes vegetation layer, biochar modified small particle size recycled concrete aggregate layer, coarse particle size recycled concrete aggregate layer, gravel recycled concrete aggregate layer, non-woven filter layer, drainage plate and root penetration resistant waterproof layer from top to bottom successively arranged;Wherein, biochar modified small particle size recycled concrete aggregate layer is composed of biochar and small particle size recycled concrete aggregate.It can improve the phosphorus, potassium content of substrate, which is beneficial to promote plant growth, biochar has good adsorption function, and can improve leachate water quality.Avoid the problem of poor drainage of roof.Crude particle size recycled concrete aggregate substrate planting environment is alkaline, can inhibit plant root growth, avoid roof waterproof layer to be subjected to plant root system intrusion damage, protect roof waterproof structure, prevent roof from leaking.

The utility model relates to the technical field of soil fertilization, in particular to a vehicle-mounted soil water and fertilizer conveying probe which comprises a rotating arm, an outer protection cone plate is fixedly mounted at the bottom of a mounting shell, and a V-shaped plate is fixedly mounted at the bottom of an inner cavity of the outer protection cone plate. The outer protection cone plate is arranged outside the probe of the soil nitrogen phosphorus and potassium sensor, the protection capacity for the probe can be improved, the V-shaped plate is arranged in the outer protection cone plate, and the third motor is started to drive the extension arm connected with the output shaft of the third motor to drive the outer protection cone plate to turn over, so that the detection accuracy is improved. Therefore, the soil can be prevented from being attached to the inside of the outer protection cone plate to influence the result of soil re-detection, the fertilization accuracy is ensured, and the problems that in the prior art, in order to ensure the fertilization accuracy when water and fertilizer are sprayed to the soil, a soil sensing probe structure is usually arranged on a tumbrel, but the structure lacks protection, and the fertilization accuracy is poor are solved. When being inserted into the soil, the anti-collision device is easy to damage due to touching hard objects, the safety is low, and the service life is influenced.

The present application belongs to the technical field of soil spectrum detection and agricultural informatization, and discloses a multi-modal spectrum soil property estimation method based on task priori gated distillation. Visible-near infrared reflectance spectrum, X-ray fluorescence spectrum and laser-induced breakdown spectrum of the same sample are obtained, and after pretreatment, teacher soft labels and intermediate features are generated by PLS, SF-PLS and GR chemometric teacher models; the student network extracts modal features through three one-dimensional convolution branches, adopts GeM / TopK aggregation, Dirichlet task gating and double expert prediction modules for fusion and regression, and is jointly trained by output distillation, feature distillation, true value regression and gating regularization. In the inference stage, only the student network is deployed for clay, organic matter, cation exchange capacity, pH, base saturation and extractable phosphorus, potassium, calcium and magnesium estimation.

The invention relates to the technical field of soilless culture planting sand, in particular to steel slag fine powder planting sand and a preparation method and application thereof. According to the steel slag fine powder planting sand, the steel slag fine powder serves as the main raw material, steelmaking by-products are effectively utilized, environmental pollution is reduced, and the raw material cost is reduced. By adding the pore-forming agent and the glass powder, a uniform porous structure is formed, high air permeability and water and fertilizer retention capacity are achieved, and the strict requirement of orchid root systems for air permeability is met; in addition, ground phosphate rock and potassium chloride are further included, phosphorus and potassium elements necessary for plants are provided, nutrient solution dependence in the initial stage is reduced, and plant growth is promoted; the provided planting sand is more suitable for planting orchid plants with high requirements on air permeability of root systems, and is beneficial to wide application.

This invention discloses an amino acid organic water-soluble fertilizer based on earthworm enzymatic hydrolysate. The amino acid organic water-soluble fertilizer is obtained by encapsulating earthworm enzymatic hydrolysate and nitrogen, phosphorus, and potassium organic materials in a microgel. The microgel is obtained by cross-linking chitosan quaternary ammonium salt and cellulose with a cross-linking agent. The positively charged quaternary ammonium salt structure in the microgel plays a role in dispersion, stabilization, and antibacterial action. The encapsulation of the organic water-soluble fertilizer provides a slow-release effect, preventing fertilizer loss. The resulting microgel has a particle size of 1-20 μm, making it easy to spray.

The application discloses a prevention and treatment method of Hippophae rhamnoides L. cluster top disease, which adopts a physical prevention and treatment method of spraying potassium permanganate in mid-April and spraying microbial agent + phosphorus and potassium compound foliar fertilizer from early May in combination with artificial removal to prevent and treat the Hippophae rhamnoides L. cluster top disease. The prevention and treatment method can effectively inhibit the development of the Hippophae rhamnoides L. cluster top disease. Field prevention and treatment tests show that after the prevention and treatment method is used, the plants with the Hippophae rhamnoides L. cluster top disease can grow a large number of symptomless tender branches in autumn, and the plants with the disease in the second year are all free of the cluster top symptom and in a healthy state. The prevention and treatment method has a good prevention and control effect on the Hippophae rhamnoides L. cluster top disease and is suitable for popularization and application in Hippophae rhamnoides L. cluster top disease prevention and control practices.

The invention relates to the technical field of corn soaking water treatment, in particular to a process method for comprehensively treating corn soaking water and obtaining inositol and potassium struvite, which comprises the following steps: treating corn soaking water supernatant as a raw material by first cation and first anion resin columns; the collected desorption solution is subjected to concentration, ultrasonic enzymolysis, decoloration and simulated moving bed chromatographic separation, an obtained inositol phase enters a second cation resin column and a second anion resin column, and an inositol product is obtained through concentration crystallization and drying; adding magnesium chloride hexahydrate into the collected salt phase, adjusting the pH value, filtering, respectively collecting precipitate (potassium struvite) and filtrate, concentrating and crystallizing the filtrate, filtering, and carrying out bipolar membrane electrodialysis treatment on the collected crystallization mother liquor; according to the process method, inositol and potassium struvite products can be obtained, phosphorus and potassium in the corn soaking water are recycled, resource waste is avoided, consumption of a resolving agent (potassium chloride) is reduced, and cost is saved.

The invention relates to the technical field of microorganisms, in particular to pantoea BG4-1 with a growth promoting effect and application of the pantoea BG4-1. The pantoea BG4-1 is preserved in the China General Microbiological Culture Collection Center on June 20, 2025, and the preservation number of the pantoea BG4-1 is CGMCC NO.34960. The pantoea BG4-1 has relatively strong capabilities of dissolving phosphorus, dissolving potassium and producing IAA (Indoleacetic Acid), and has a remarkable growth promoting effect on capsicum and arabidopsis thaliana. According to the invention, a high-quality strain resource is provided for developing a novel efficient biological phosphorus-potassium fertilizer, the method has important meanings for improving the utilization rate of phosphorus and potassium elements in soil, reducing the application of chemical phosphorus-potassium fertilizers and promoting the sustainable development of agriculture, meanwhile, a new way is provided for resource utilization of invasive plants, and the ecological management concept of'taking harm as benefit 'is favorably realized.

The invention relates to the technical field of compound fertilizers, in particular to a preparation process of a nitrogen-phosphorus-potassium balanced fertilizer containing inositol and protein, which comprises the following steps: taking a porous material as a carrier, adding phosphorus-potassium powder and monopotassium phosphate mother liquor, stirring, mixing and drying to obtain a carrier material loaded with phosphorus and potassium, spraying a compound solution containing inositol and protein into the carrier material loaded with phosphorus and potassium, and preparing the nitrogen-phosphorus-potassium balanced fertilizer containing inositol and protein. The preparation method comprises the following steps: stirring, mixing and drying to obtain a carrier material loaded with inositol and protein, spraying a urea solution, adding potassium sulfate powder, granulating, screening to obtain particles with qualified particle size, spraying a coating solution containing humic acid and chitosan, and drying to obtain the nitrogen-phosphorus-potassium balanced fertilizer containing inositol and protein. The balanced fertilizer obtained by the preparation process has a relatively good utilization rate, not only provides balanced nitrogen, phosphorus and potassium, but also realizes triple effects of nutrition, growth stimulation and soil improvement by adding bioactive substances (inositol and protein) and natural coating materials (humic acid and chitosan).

The application provides a plant straw-converted liquid fertilizer synergist and a preparation method thereof. The ordinary straw is used as a reaction raw material, so that the source is wide and the price is low. The straw is decomposed through treatment, phosphoric acid groups are introduced, polysaccharides are decomposed into oligosaccharides, and a variety of strains are compounded to form the fertilizer synergist. The fertilizer synergist can form stable complex with ammonium nitrogen and metal cations, reduce the rapid loss of nitrogen, selectively promote the reproduction of beneficial microbial communities, regulate the rhizosphere micro-ecological balance, enhance the functions of nitrogen fixation, phosphorus and potassium dissolution and the like, and realize biological synergism. Overall, through multiple ways of'slow release + growth promotion + soil improvement', the fertilizer synergist provided by the application forms synergistic and long-acting effects in the aspects of fertilizer utilization rate, crop growth promotion and soil improvement.

The application discloses an Enterobacter cloacae and application thereof in tobacco growth promotion, and belongs to the technical field of microorganisms. The Enterobacter cloacae FBH1 is preserved in the China Center for Type Culture Collection (CCTCC), the preservation address is Wuhan University, Wuhan, China, the preservation number is CCTCC NO: M 20241838, and the preservation time is August 23, 2024. The Enterobacter cloacae (FBH1) is isolated for the first time. Enterobacter cloacae The strain FBH1 has good abilities of phosphorus solubilization, potassium solubilization, IAA secretion, iron carrier production and ACC deaminase production, can significantly improve the seed germination rate, germination potential, seedling length and root length, thereby promoting seed germination, can significantly promote plant growth, can reduce the enrichment of phosphorus and potassium elements in tobacco planting layer soil, and can improve the fertilizer utilization efficiency, and therefore has good application prospect.