1594results about "Potassium fertilisers" patented technology

A high-nutrient and high-activity chemical fertilizer-biological compound fertilizer, and a preparation method and application thereof are provided. The high-nutrient and high-activity chemical fertilizer-biological compound fertilizer includes an inorganic chemical fertilizer and a microbial agent. The chemical fertilizer-biological compound fertilizer has nutrient contents of nitrogen, phosphorus, and potassium of greater than 40% and a viable number of microorganisms of 200 million cfu / g or more. The chemical fertilizer-biological compound fertilizer further includes a microbial protectant, and a mass ratio of the microbial protectant to the microbial agent is ≥1.

The invention relates to serratia marcescens XJ108 and application thereof, and belongs to the technical field of microorganisms. The serratia marcescens XJ108 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.29557, the preservation date is January 10, 2024, and the address of the preservation institution is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The invention also provides application of the serratia marcescens XJ108 in acid environment, alkaline environment, high salinity environment and high chemical fertilizer environment soil tolerance and plant growth promotion. The serratia marcescens XJ108 provided by the invention has certain biological safety; meanwhile, the plant growth promoting function is achieved; and various extreme soil environments can be tolerated.

The invention discloses a polymeric phosphorus slow-release compound fertilizer and a preparation method thereof, and relates to the technical field of agricultural fertilizers, the polymeric phosphorus slow-release compound fertilizer comprises an inner core and a coating layer, wherein the inner core is prepared from the following components in percentage by weight: 30 to 50 percent of modified ammonium polyphosphate, 15 to 25 percent of urea-formaldehyde slow-release nitrogen, 10 to 20 percent of potassium humate-coated potassium chloride, 2 to 5 percent of amino acid chelated trace elements and 1 to 3 percent of seaweed extract; through the synergistic effect of the citric acid modified ammonium polyphosphate and the three layers of functional envelopes, the phosphorus utilization rate is increased, and the problem that phosphorus is easily fixed by soil is effectively solved. The fertilizer can automatically adapt to different soil environments through the pH responsive coating design, and 30-40% of phosphorus can be quickly released in acid soil to meet the early needs of crops; phosphorus is continuously supplied through activation of the phosphate solubilizing bacteria under a neutral condition; and the fertilizer efficiency is prolonged to 120-150 days by virtue of an outer layer slow release mechanism in an alkaline environment.

The invention discloses a microbial synergistic slow-release fertilizer and a preparation method thereof. The fertilizer comprises an organic-inorganic mixture, microbial agent microcapsules and a coating layer. The preparation method mainly comprises the following steps: firstly, through a sectional fermentation process, mixing corn straws with humic acid, adding an improved microbial inoculum for fermentation, and premixing biochar with ammonium dihydrogen phosphate and potassium sulfate to improve the nutrient adsorption efficiency; embedding beneficial microorganisms such as nitrogen-fixing bacteria, phosphate solubilizing bacteria and the like with the seaweed extract to prepare a microcapsule fungicide with high survival rate, and forming slow-release fertilizer particles with the organic-inorganic mixed material through a specific granulation process; and finally, coating the surfaces of the particles, forming a basic slow-release film by using a sodium alginate-diatomite mixed solution, and further wrapping environment-sensitive hydrogel, the microbial synergistic slow-release fertilizer disclosed by the invention is particularly suitable for planting crops such as rice in saline-alkali soil, and has remarkable agricultural application value and environmental friendliness.

The invention relates to a tea garden acidic soil conditioner, which is prepared from the following raw materials in parts by weight: 10 to 15 parts of alkaline conditioning materials, 10 to 30 parts of honey pomelo waste fruit fermented organic fertilizers, 4 to 6 parts of alkali modified biochar, 2 to 4 parts of biostimulant, 3 to 5 parts of graft modified chitosan, 0.25 to 0.6 part of dicyandiamide, 0.5 to 1 part of complex microbial inoculants, 0.25 to 0.5 part of binding agents and 0.006 to 0.012 part of trace element substances. The alkaline conditioning material is a mixture of magnesium-containing mineral substances and shell powder in a mass ratio of 10: (2-5); the graft modified chitosan is obtained by grafting and modifying chitosan through an unsaturated phosphorus-containing monomer and an unsaturated nitrogen-sulfur-containing monomer, and the grafting rate is 20-30%; the biostimulant comprises mineral source fulvic acid, magnesium sulfate, monopotassium phosphate and a seaweed extract. The tea garden acidic soil conditioner provided by the invention can effectively improve tea garden soil, so that the yield and quality of tea leaves are obviously improved.

The invention relates to the technical field of fertilizers, and discloses a coating material, a preparation method and application of the coating material in a trace element coating for potassium chloride particles. The preparation method comprises the following steps: reacting isophorone diisocyanate with polycaprolactone diol, tartaric acid and dimethylglyoxime to prepare a polyurethane prepolymer, continuously reacting the polyurethane prepolymer with chitosan oligosaccharide Schiff base to obtain chitosan oligosaccharide modified polyurethane, and mixing the chitosan oligosaccharide modified polyurethane, a cross-linking agent, silane modified isocyanate and a trace element solution to obtain the coating material. The coating material is good in mechanical property, contains trace elements, has a controlled release effect on the potassium chloride granulated fertilizer, and can be applied to the potassium chloride granulated fertilizer as a trace element coating.

The invention discloses an environment-friendly slow release fertilizer and a preparation method thereof, and belongs to the technical field of fertilizer mixture preparation. The preparation method comprises the following steps: mixing and stirring a mussel extract-polysaccharide-nitrogen fertilizer complex, an inorganic fertilizer and water according to a weight part ratio of (1-2): (5-7): (15-23), heating to 50-60 DEG C to form a dispersion solution, mixing and stirring the dispersion solution and a calcium salt according to a weight part ratio of 1: (0.005-0.01), cooling to 20-25 DEG C, and reacting for 20-24 hours to obtain a viscous mixture; and drying, dewatering and crushing the viscous mixture to obtain the environment-friendly slow-release fertilizer. According to the environment-friendly slow-release fertilizer, the mussel extract with a good adhesion effect and the carboxymethyl cellulose or the hyaluronic acid with biocompatibility are used as carriers, through the synergistic cooperation of an amide structure, an imine structure and metal coordination, wrapping of a nitrogen fertilizer and an inorganic fertilizer is achieved, and finally the environment-friendly slow-release fertilizer is obtained.

The invention discloses a clean production process of a blended fertilizer, which comprises the following steps: preparing and selecting raw materials; performing primary granulation on different raw materials to obtain uniform granular raw materials; performing closed ventilation storage on the granular raw materials; proportioning and metering the granular raw materials; mixing and stirring; finally, packaging is carried out, 4-5 mm particles obtained after the raw materials are subjected to extrusion forming through a pair of rollers and subjected to primary granulation are consistent in appearance state, air in the raw materials is removed through extrusion, gaps are compressed, the density and specific gravity of the formed particles tend to be uniform, and the product quality is improved. Blending layering caused by particle size, density difference and different adsorption capacities cannot occur when the raw materials are blended, the blended compound fertilizer meets the international general blending fertilizer proportioning principle, the completely-homogenized blending fertilizer quality requirement can be met, the processing cost is saved, the production efficiency is improved, and the production cost is reduced. And the problem of caking of the raw materials is effectively solved.

The invention discloses a production method of distiller's grain fermentation liquid fertilizer specially applied to roxburgh rose. The distiller's grain fermentation liquid fertilizer is prepared bythe step of evenly mixing 50 to 80 parts of distiller's grain fermentation extracting solution, 0.5 to 1 part of microelement, 5 to 10 parts of seaweed meal, 5 to 10 parts of natural active organism,2 to 5 parts of potassium bicarbonate, 2 to 5 parts of natural active organism and 2 to 5 parts of natural surface active agent. A preparation method of the distiller's grain fermentation extracting solution comprises the steps: evenly stirring 50 to 80 parts of distiller's grain, 50 to 150 parts of rice washing water, 1 to 2 parts of EM microflora fermentation liquid and 0.5 to 1 part of sugar, performing composting fermentation at the room temperature to obtain a distiller's grain fermentation material, stirring and extracting through a sodium carbonate water solution, filtering and performing evaporation and condensation on obtained filtrate until the density is 1.1 to 1.2 to obtain distiller's grain fermentation extracting solution. The distiller's grain fermentation liquid fertilizerdisclosed by the invention has a good use effect, meanwhile can effectively prevent pest and disease damage to the roxburgh rose and is high-efficiency environment-friendly liquid fertilizer.

The invention discloses a production method for preparing a potassium humate fertilizer through continuous high-pressure hydrothermal reaction of potassium feldspar, and relates to a wet grinding pulping process, a hydrothermal reaction process, a flash evaporation filter pressing process, a humic acid modified potassium fertilizer preparation process and a causticization and humic acid modified silicon-calcium fertilizer preparation process. The preparation method comprises the following steps: firstly, carrying out high-pressure tubular hydrothermal reaction and tower-type delayed reaction on potassium feldspar alkaline ore pulp prepared by fine grinding to prepare potassium aluminosilicate and calcium silicate, mixing alkaline potassium aluminosilicate filter residues obtained by filtering with humic acid, modifying, granulating and drying to obtain a humic acid coated long-acting slow-release potassium fertilizer product. The alkaline calcium silicate filtrate and lime are subjected to a causticization reaction to obtain a KOH solution, the KOH solution is returned to a wet pulping process to be recycled, and the alkaline calcium silicate and the humic acid are mixed, modified, granulated and dried to produce the humic acid coated long-acting slow-release silicon-calcium fertilizer product.

The invention provides a soil flora analysis method, a related soil flora and application thereof. Based on a soil long-term positioning test, an absolute quantitative method is used for the first time to explore a dynamic assembly rule of rhizosphere and in-root microbiome in a plant full life cycle, and the response characteristics of the rhizosphere microbiome to different fertilization treatments are studied. By combining methods of metagenome, microorganism isolated culture, community synthesis and the like, functional adaptation of rhizosphere microorganisms under different fertilization conditions and a mechanism of influencing the growth of leguminous plants are disclosed. The invention also provides a method for improving the chemical properties and soil flora of soil; the invention also provides an artificially synthesized flora which has a promoting effect on the growth and biomass of leguminous plants.

The invention relates to an alkaline activated carbon multi-stage synergistic potassium removal method, and belongs to the technical field of activated carbon materials. According to the method, a four-step synergistic process of water washing, acid pickling, ion exchange and nitrogen calcination is adopted, and a waste acid recycling closed-loop system is combined. The deep removal of residual potassium is realized through the synergistic effect of countercurrent water washing, pH (Potential of Hydrogen) staged regulation and control acid washing, deep potassium removal by ion exchange resin and nitrogen protection calcination, and meanwhile, the high specific surface area is maintained; the pickling waste liquid is neutralized, concentrated and crystallized to be converted into agricultural potash fertilizer, and mother liquid is recycled to form green circulation.

The invention provides a nutrient slow-release synergistic seedling transplanting disc and application thereof. The nutrient slow-release synergistic seedling transplanting disc is composed of a disc body and a seedling cup, the disc body is composed of two layers of materials including PBAT and PLA, the seedling cup is composed of three layers of materials, the inner layer is made of the PBAT material, the middle layer is a strip-shaped fertilizer belt made of macroelements, organic fertilizer, bacterial fertilizer and microelements, and the outer layer is made of the PLA material. The nutrient slow-release synergistic seedling transplanting disc integrates seedling raising and fertilization and can be used for seedling transplanting of grafted seed melons, seedling cups are directly transplanted into soil during transplanting, seedlings and the disc do not need to be manually separated, the seedling transplanting disc does not need to be recycled and transported after transplanting, the seedling cups in the soil isolate damage of salt, alkali and diseases and insect pests to seedling roots, and the seedling transplanting disc is convenient to use. Meanwhile, nutrient substances are slowly released, nutrients needed by melon seedlings are accurately met, the problem that an original seedling raising plate pollutes the environment is solved, and the problems that roots are damaged during transplanting, fertilization is balanced, the growth environment of the roots is poor and germs are harmed are solved.

The invention relates to the technical field of compound fertilizers, and discloses a boron-zinc-molybdenum synergistic compound fertilizer, which is prepared from the following raw materials in parts by weight: calcium nitrate, ammonium polyphosphate, potassium sulfate, magnesium sulfate, disodium octoborate tetrahydrate, sugar alcohol chelated zinc, sodium molybdate and a synergistic auxiliary agent, the feed additive is prepared from a feed additive, an activator, 5-alginic acid oligosaccharide, aminolevulinic acid, sugar alcohol chelated magnesium, an antagonist, a stress-resistant enhancer and a coating material. According to the boron-zinc-molybdenum synergistic interaction compound fertilizer and the preparation process thereof, the disodium octoborate tetrahydrate, the sugar alcohol chelated zinc and the sodium molybdate are compounded according to a specific proportion, antagonism is avoided through proportion limitation, the synergistic effect of the three elements is remarkably enhanced, and the problem that a single element is insufficient or excessive is solved; chelated elements such as sugar alcohol chelated zinc and sugar alcohol chelated magnesium are combined with an activating agent (humic acid chelated calcium and silica sol) to form a gel-state chelate, so that the trace elements can be prevented from being fixed by soil, and the transfer efficiency of the trace elements in crops is improved.

The invention discloses a special compound microbial fertilizer for corn and a preparation method, and relates to the technical field of special fertilizers for crops. The organic fertilizer is prepared from the following components in parts by weight: 15-20 parts of a microbial agent, 8-10 parts of charcoal, 20-25 parts of decomposed sheep manure, 8-10 parts of biogas residues, 5-8 parts of humic acid, 5-10 parts of monoammonium phosphate, 10-15 parts of urea, 8-12 parts of potassium chloride, 1-1.5 parts of boric acid, 1-2 parts of zinc amino acid chelate, 0.5-1 part of lipopeptide surfactin and 3-5 parts of diatomite. The four strains of bacillus amyloliquefaciens, azospirillum, bacillus subtilis and streptomycete are inoculated according to a proportion and are subjected to shake culture for 36 hours under the conditions that the temperature is 30 DEG C and the rotating speed is 180 rpm, the viable count reaches 2 * 10 CFU / mL, the four strains are co-cultured to reduce process steps, the nitrogen-fixing bacteria reduce the use amount of urea by 15%, the streptomycete improves the nematode inhibition rate by 40%, and meanwhile the culture cost is saved.

The invention relates to the technical field of leymus chinensis planting, in particular to a method for planting leymus chinensis in a salinized sand land, which is used for interplanting mousse winterplant in an oat land. The row spacing is 80 cm, the sowing depth is 1-1.5 cm, the sowing amount is 0.5 kg / mu, sowing is carried out in line, and 27.8 kg / mu urea (N is greater than or equal to 46%) is applied as a base fertilizer. Timely irrigation. The fertilizer is applied once in spring every year. A test nitrogen fertilizer is urea (N > = 46%), a phosphate fertilizer is triple superphosphate (P2O5 > = 44%), a potash fertilizer is potassium sulfate (K2O > = 52%), and timely irrigation is carried out. According to the invention, not only is a proper fertilizer combination provided, but also the growth, development and asexual reproduction capabilities of leymus chinensis are greatly improved. The planting effect of leymus chinensis can be effectively improved, the yield and quality of leymus chinensis are improved, and good practicability is achieved. Meanwhile, the formula is economical and reasonable, and is easy to popularize and apply.

The invention belongs to the technical field of fertilizers, and particularly relates to a fertilizer for capsicum as well as a preparation method and a fertilization method thereof. In the pepper planting process, the proportion of carbon and nitrogen in the soil is coordinated, the nutrient slow release effect is achieved, the contradiction between vegetative growth and reproductive growth of pepper plants is relieved, and the fertilizer utilization rate is increased. In addition, a microbial agent is applied to the roots after transplanting, and the soil matrix and the disease resistance are enhanced by utilizing the disease resistance and the soil microenvironment improving capability of the microbial agent, so that the pepper yield is increased. The technology is simple and easy to implement, convenient to operate and quick in effect, common farmers or farmers can easily implement the technology, soil fertility and disease resistance can be continuously improved, and the problem of nitrogen and phosphorus loss of the peppers is effectively solved.

The present invention relates to a crop nutrition and fortifying composition comprising: i. Elemental sulfur; ii. One or more water insoluble or water soluble magnesium salts or derivatives or mixtures thereof; iii. One or more water-insoluble or water-soluble potash fertilizers or salts or derivatives or mixtures thereof; iv. One or more water insoluble or water soluble iron salts or derivatives or mixtures thereof; v. One or more water insoluble or water soluble zinc salts or derivatives or mixtures thereof; vi. One or more water-insoluble or water-soluble boron salts or derivatives or mixtures thereof; vii. At least one trace element selected from the group consisting of water-insoluble or water-soluble vanadium salts or derivatives or mixtures thereof and water-insoluble or water-soluble selenium salts or derivatives or mixtures thereof; and viii. One or more excipients wherein the composition comprises microparticles having a size in the range of 0.1 to 50 microns, and wherein the total content of the water-soluble salts, derivatives or mixtures in the composition does not exceed 80% of the total weight of the composition. The invention also relates to a method for preparing the crop nutrition and fortifying composition and a method for treating a plant, a seed, a crop, plant propagation material, a locus, parts thereof or soil with the crop nutrition and fortifying composition.

The invention relates to the technical field of soil improvement, and discloses a sandy grainfield soil organic matter quality improvement and increment method which comprises the following steps: comprehensively detecting soil, preparing an improvement material according to a comprehensive detection result, and deeply ploughing and returning the soil to the field; planting multifunctional intercrops, and crushing, turning and pressing the multifunctional intercrops into a soil layer to perform in-situ green manure returning from the full-bloom stage to the initial pod stage of the multifunctional intercrops; a polymeric organic-inorganic composite conditioner is applied; applying water, fertilizer and bacteria integrated regulation and control based on micro-spray irrigation; and high-stubble no-tillage straw covering and annual monitoring are implemented. According to the method, the organic matter, porosity and the like of the soil can be remarkably improved, and the ecological environment of the soil is remarkably improved.

A fertilizer composition comprising nitrogen, potassium, sulfur, a carbon black that is acid modified and activated, and a plurality of live microorganisms and methods for producing and using the same.

The invention relates to a method for preparing a silicon-calcium-potassium-magnesium phosphate fertilizer from phosphate tailings, and relates to the technical field of phosphate tailing recycling, the method for preparing the silicon-calcium-potassium-magnesium phosphate fertilizer from the phosphate tailings comprises the following steps: carrying out acidolysis on the phosphate tailings to obtain a leaching residue A and a leaching solution M; an impurity removal agent is added into the leaching slag A, heavy metal elements in the leaching slag A are removed, and leaching slag B is obtained after solid-liquid separation; activating the leaching residue B by hot alkali, and performing solid-liquid separation to obtain a filter residue A; a phosphorus supplement is added into the leachate M, and filter residues B are obtained after solid-liquid separation; and fully mixing the filter residue A and the filter residue B to obtain the silicon-calcium-potassium-magnesium phosphate fertilizer. The method disclosed by the invention is low in energy consumption and high in phosphate tailing recovery rate, and the prepared silicon-calcium-potassium-magnesium phosphate fertilizer has a relatively high adsorption effect on part of main heavy metals.

The invention relates to the technical field of suspending agent preparation, and discloses a macroelement water-soluble fertilizer suspending agent, which comprises macroelements, medium trace elements, a suspending agent and an auxiliary agent, and a preparation method of the macroelement water-soluble fertilizer suspending agent comprises the following steps of: preparing the macroelement water-soluble fertilizer suspending agent; the preparation method comprises the following steps: S1, raw material pretreatment, S2, macroelement dissolution, S3, medium trace element addition, S4, suspending agent and auxiliary agent addition, S5, fine treatment, and S6, packaging and storage, the stability of the suspending agent is significantly enhanced: a more stable suspension system is constructed by precisely adjusting the ratio of xanthan gum to the sodium carboxymethyl cellulose suspending agent, and the unique component proportion enables the fertilizer to have a better effect after the fertilizer is stored for 6 months. The nutrient precipitation rate can still be kept below 5%, the uniformity of the fertilizer in the storage and transportation process is effectively guaranteed, farmers do not need to worry about uneven fertilization caused by nutrient precipitation in the application process, it is guaranteed that crops can continuously and evenly absorb nutrients, and healthy growth is promoted.

The invention relates to the technical field of crop straw treatment and soil improvement, in particular to a rice straw returning method for improving soil fertility, which mainly comprises the following steps: crushing rice straws, soaking with a sodium hydroxide solution, and drying; then selecting specific strains, mixing and fermenting to prepare a microbial agent; preparing a composite additive in proportion; within 1-2 days after the rice is harvested, the pretreated straw, the microbial agent and the composite additive are applied to the field, deep ploughing is conducted, and irrigation is conducted; and finally, performing rotary tillage and soil preparation after straw decomposition, and monitoring and adjusting the pH value of the soil when next-stubble crops are planted. According to the method, straw is pretreated, lignin is destroyed through a sodium hydroxide solution, the particle size is accurately controlled, drying is conducted in cooperation, the microbial decomposition efficiency is improved, straw and soil are fully mixed through accurate ploughing in the field, decomposition is accelerated into nutrients, the straw can be powerfully decomposed through a microbial agent, and the soil micro-ecology is improved; the composite additive supplements various nutrients and enhances the water and fertilizer retention capability of soil.

The present invention discloses a Priestia megaterium strain YC5, a microbial agent thereof and applications thereof, belonging to the technical field of slow and controlled release fertilizers. For the first time, the present invention isolates and screens a Priestia megaterium ( Priestia megaterium Priestia megaterium ) YC5 from farmland soil, which can degrade and promote the nutrient release of nutrient polymeric slow release fertilizers. The strain has a good degradation effect on nutrient polymeric slow release fertilizers, and its nutrient release can be efficiently matched with crop requirements. Applying the strain to farmland soil where nutrient polymeric slow release fertilizers are applied, the degradation of nutrient polymeric slow release fertilizers by the strain can promote nutrient release, with the characteristics of high nutrient utilization efficiency, high matching degree between nutrient release and crop requirements, and environmental friendliness, which is of great significance for promoting the precise and wide application of nutrient polymeric slow release fertilizers in agriculture.

The invention relates to the technical field of fertilizers, and discloses a slow-release coated fertilizer and a preparation method thereof. Comprising the following raw materials in parts by weight: 57 to 77.6 parts of urea, 14.25 to 24.25 parts of diammonium phosphate, 0 to 5 parts of calcium superphosphate, 4.75 to 14.55 parts of potassium chloride, 0.03 to 0.2 part of chitosan, 0.0075 to 0.05 part of nano silicon dioxide, 0.001 to 0.015 part of glutaraldehyde, 2.96 to 4.94 parts of deionized water, 0.01 to 0.1 part of bacillus subtilis, 0.05 to 0.2 part of mesoporous silicon dioxide loaded nano selenium and 0.5 to 1 part of potassium fulvate. Chitosan, nano silicon dioxide and glutaraldehyde are matched with one another, and chitosan has pH responsiveness, so that the problems that a coating layer of a traditional slow-release fertilizer is prone to being affected by the environment and broken in advance, nutrients are rapidly released, and the slow-release effect is reduced are solved.

The invention relates to the field of organic fertilizer manufacturing, in particular to a preparation method of a humic acid-containing water-soluble organic fertilizer with chelated medium trace elements for synergism, and the preparation method comprises the following steps: S1, adding modified humic acid into deionized water, heating to 40-50 DEG C, stirring for 25-35 minutes, adding hydrated ferrous sulfate, introducing compressed air, and stirring for reaction for 30-50 minutes to obtain a chelating solution and the like; according to the invention, the environmental adaptability of humic acid is improved through molecular structure modification, a composite chelation system is constructed to enhance element stability, a multistage chelation sequence is optimized to prevent ion antagonism, and a physical barrier is innovated to realize a core process path of intelligent controlled release. The functional limitation of a traditional fertilizer in a complex agricultural ecological system is effectively broken through, the nutrient utilization efficiency and agricultural sustainability are remarkably improved, and the fertilizer has wide application prospects in soil remediation, precision agriculture and resource-saving planting systems.

The invention relates to the technical field of compound fertilizers, and particularly discloses a potash magnesium sulphate fertilizer and a preparation process thereof, the potash magnesium sulphate fertilizer comprises the following components: crystallized potassium sulphate, crystallized magnesium sulfate and an anti-caking agent; wherein the mass ratio of the crystallized potassium sulfate to the crystallized magnesium sulfate is (1-10): 1; the crystallized potassium sulfate and the crystallized magnesium sulfate are prepared by adopting a hot melting-cold crystallization process; the anti-caking agent is modified silicon dioxide gel loaded with a moisture absorbent, and the mass ratio of the moisture absorbent to the silicon dioxide gel in the modified silicon dioxide gel is (1-3): 10; the mass ratio of the anti-caking agent to the crystallized magnesium sulfate is (5-15): 100. The potash magnesium sulphate fertilizer with different proportions of potassium sulphate and magnesium sulfate can be designed according to needs, and the caking risk of the potash magnesium sulphate fertilizer in the storage process can be reduced.

The invention relates to the technical field of sustained and controlled release fertilizers, in particular to a soil-improving disease-resistant sustained and controlled release fertilizer and a preparation method thereof. The preparation method comprises the following steps: (1) preparation of the nutrient core: weighing an organic fertilizer, an ammonium nitrogen fertilizer, a phosphate fertilizer, a potash fertilizer, a biological regulator, chelated medium trace elements and modified attapulgite, uniformly mixing, and granulating to obtain the nutrient core; (2) covering an organic polymer coating layer: dissolving polylactic acid in a solvent to form a composite solution, spraying the composite solution on the surface of the nutrient core, and drying to obtain an organic polymer coated nutrient core; and (3) covering a mineral coating layer. The outermost layer of the soil-improving disease-resistant controlled-release fertilizer provided by the invention is the mineral coating layer, the mineral coating layer can be gradually disintegrated after being applied to soil, mineral components can improve the physical structure of the soil, regulate the acid-base property of the soil and increase the content of organic matters in the soil after entering the soil, and inorganic and organic nutrients are slowly released into the soil through the organic polymer coating layer; nutrient substances are continuously supplied, and common diseases of the corn are prevented and controlled.

The invention discloses a coated slow-release solid water-soluble fertilizer as well as a preparation method and application thereof. The coated slow-release solid water-soluble fertilizer comprises the following components in parts by weight: 15-20 parts of a nitrogen source, 8-12 parts of a phosphorus source, 15-25 parts of a potassium source, 3-8 parts of humic acid and 10-15 parts of charcoal powder, the composite material comprises the following components in parts by weight: 0.5-1.5 parts of functional microorganisms, 1-2 parts of microbial metabolite, 2-5 parts of seaweed extract and 5-8 parts of chitosan-gelatin composite material. The functional microorganisms are bacillus subtilis, bacillus licheniformis and azospirillum which are adsorbed on the charcoal powder. The coated slow-release solid water-soluble fertilizer provided by the invention has the effects of supplying nutrients and preventing and treating soil-borne diseases, achieves multiple effects by one fertilizer, and can improve the crop nutrient utilization rate, inhibit the soil-borne diseases and promote the diversity of soil microorganisms.

The present invention provides a novel greenhouse gas emission reduction stable fertilizer, and relates to the technical field of fertilizers. The raw materials of the stable fertilizer of the present invention include the following components by mass: 20-25 parts of coated inorganic fertilizers, 50-65 parts of microbial fertilizers, 1.2-1.5 parts of sulfates, 20-35 parts of anionic polyacrylamide, 40-55 parts of humic acid, 1-2 parts of threonine, and 2-3 parts of polyaspartic acid. The present invention ensures fertilizer efficiency and reduces nitrous oxide emissions by effectively stabilizing nitrogen through scientific and reasonable fertilizer component design, and also has the effect of methane gas emission reduction, which provides a direction for greenhouse gas emission reduction. The present invention also has the characteristics of simple preparation process, and has extremely high promotion and application value in the field of agriculture.