77results about How to "Improve fertilizer efficiency" patented technology

The invention discloses a biomass pyrolysis product prediction method based on a machine learning model, and the method comprises the steps: collecting data under different biomass pyrolysis conditions, and carrying out the processing of the data, and obtaining target data; constructing a machine learning model, and training the machine learning model based on the target data to obtain a target machine learning model; according to the target machine learning model, predicting the yield of the biochar and the content of nitrogen, phosphorus and potassium, and obtaining a prediction result of the yield of the biochar and the composition of nitrogen, phosphorus and potassium elements. By introducing the machine learning model and combining the data enhancement technology, high-precision prediction can be performed on the yield of the biochar and the contents of nitrogen, phosphorus and potassium of the biochar based on the element composition and pyrolysis process parameters of the biomass raw material, and technical support is provided for optimization design of the biomass pyrolysis process and application of the biochar fertilizer.

The invention relates to the technical field of fertilizers, and discloses a fulvic acid fertilizer based on straw microbial fermentation and a preparation method and application thereof.The preparation method comprises the steps that straw is crushed and subjected to low-temperature plasma pretreatment, and pretreated straw is obtained; then, culturing the mixed microbial preparation to prepare a culture solution; then, the pretreated straw, a nutrient solution, a fermentation auxiliary agent and trichoderma are mixed for fermentation, and therefore a fermentation product is generated. The fermentation auxiliary agent is prepared from seaweed meal, bean flour, humus soil and molasses. And finally, carrying out solid-liquid separation on the fermentation product, and drying the separated solid part to finally obtain the fulvic acid fertilizer. Through combination of low-temperature plasma pretreatment and an innovative fermentation auxiliary agent, the preparation process of the fulvic acid fertilizer is optimized, the fertilizer efficiency of the fertilizer and the crop growth effect are improved, and meanwhile, the environment problem of agricultural waste is solved.

The invention relates to a microbial preparation containing arbuscular mycorrhizal fungi and application thereof, and belongs to the technical field of plant cultivation. According to the application disclosed by the invention, it is found that all of the glomus amarae, the rhizopus intro-rhizosporium, the glomus mosseae and the cyst macrosporium in the arbuscular mycorrhizal fungi can promote the growth of plants under the condition of double pollution of molybdenum and micro-plastics, and the plant height and the grain yield of the plants are effectively improved. Further experiments find that under the same condition, the effect is better than that of applying a single arbuscular mycorrhizal fungus inoculant when the near-phoma globosum, the rhizosporium intraradices and the glomus mosseae or the mixed inoculant of the near-phoma globosum, the glomus mosseae and the cyst macrosporium is applied. Furthermore, after beneficial bacteria and auxiliary materials are added into the mixed bacterial agent, the mixed bacterial agent has a better promoting effect on plant growth under the condition of double pollution of molybdenum and micro-plastics. The microbial preparation provided by the invention can reduce poison of microplastics and molybdenum to plants, so that the plants can normally grow under dual pollution.

The invention relates to the technical field of compound fertilizers, in particular to a selenium-rich water-soluble compound fertilizer. The selenium-rich water-soluble compound fertilizer comprises the following components in parts by weight: 10-15 parts of selenium sustained-release microspheres, 8-12 parts of a natural compound extract, 1-2 parts of potassium chloride, 1-3 parts of monoammonium phosphate, 0.1-0.2 part of EDTA chelated zinc, 0.05-0.08 part of borax and 300-500 parts of deionized water, and the selenium-rich water-soluble compound fertilizer prepared by the invention can slowly release selenium elements and effectively improve the selenium content of plants.

The invention relates to a charcoal-based compound fertilizer for improving soil acidification and a preparation method thereof, and belongs to the technical field of agriculture. Magnesium element, plant source biomass and animal source biomass are jointly pyrolyzed to prepare magnesium-containing biochar, chitin is introduced, and modified biochar rich in multiple nutrient elements is prepared. The biochar not only has the fertilizer efficiency of traditional organic fertilizers, but also can remarkably increase the pH value of soil, and meanwhile, the soil structure improvement capability and the water and fertilizer retention capability of the biochar are enhanced. Besides, the modified biochar is compounded with humic acid, amino acid, sodium carboxymethyl cellulose, attapulgite, corn starch and the like to prepare the biochar-based compound fertilizer, and the fertilizer can significantly improve soil acidification, improve soil fertility, promote plant growth and development and improve crop yield and quality; and the fertilizer also has the advantages of long-acting slow release and enhancement of plant stress resistance.

The invention discloses a nitrogen fertilizer synergist and application thereof, and belongs to the technical field of fertilizers. The nitrogen fertilizer synergist comprises the following raw materials in percentage by mass: 15-40% of a nitrification inhibitor, 5-10% of butyl dihydrojasmonate, 1-5% of a soil loosening agent, 30-50% of a dispersing aid, 5-10% of an anti-caking agent, 0.1-5% of a trace element fertilizer and 0-5% of nutritional ingredients. According to the nitrogen fertilizer synergist disclosed by the invention, by adding the dihydro jasmonic acid butyl ester, the dispersity of the nitrogen fertilizer synergist can be improved, the fertilizer efficiency of the fertilizer is improved, the growth of plants is promoted, the stress resistance of the plants is improved, the nitrogen fertilizer synergist also has double functions of delaying nitrogen conversion and promoting nitrogen absorption, the utilization efficiency of nitrogen is further improved, and the nitrogen fertilizer synergist is relatively good in flowability and can be applied to the field of agricultural production. The nitrification inhibitor is stable in high-temperature and low-temperature environments, is convenient to use, can be directly used for particle spraying or adding of fertilizer, and solves the problem that nitrification inhibitors such as DMPP can only be used after being dissolved by special solvents.

The invention relates to a method for improving the fertilizer efficiency of an organic fertilizer, and belongs to the technical field of organic fertilizer manufacturing, and the specific operation is as follows: firstly, organic fertilizer raw materials are fermented to obtain an organic fertilizer base material, the organic fertilizer raw materials are one or more of straw, livestock and poultry manure and kitchen garbage, and the organic fertilizer base material is mixed with the straw, the livestock and poultry manure and the kitchen garbage; the organic fertilizer base material and the organic metal framework material are evenly mixed, then the obtained mixture is placed in protective gas to be subjected to low-temperature drying treatment, the solid organic fertilizer is obtained after smashing, the organic metal framework material is any one of UiO-66 series, MOF-808 series and MIL-101 series, preferably MIL-101 (Fe)-SO3H, and the organic metal framework material is any one of UiO-66 series, MOF-808 series and MIL-101 series, preferably MIL-101 (Fe)-SO3H and MIL-101 (Fe)-SO3H. And finally, carrying out microwave hydrolysis treatment on the solid organic fertilizer to obtain the liquid organic fertilizer with improved fertilizer efficiency. According to the method for improving the fertilizer efficiency of the organic fertilizer, the hydrolysis efficiency of the organic fertilizer can be effectively improved, and then the fertilizer efficiency of the organic fertilizer can be improved.

The invention relates to an ion type rare earth ore tailing sandy land soil improvement structure and an improvement method, and belongs to the technical field of ecological restoration. The ion type rare earth ore tailing sandy land soil improvement structure sequentially comprises a humus layer, a surface soil layer and a subsoil layer. The subsoil layer comprises rare earth ore tailing sandy land soil and a slow-release modifier; the surface soil layer comprises the rare earth ore tailing sandy land soil, a slow-release modifier and a quick-acting modifier; the slow-release improver comprises agricultural and forestry wastes, and the quick-acting improver comprises livestock and poultry manure, lime and a compound fertilizer. According to ecological function characteristics of the soil, aiming at physical characteristics and nutrient content of the soil and specific rare earth and aluminum toxicity pollution of a mining area, the soil layer is remolded by using different dosages and different types of improvers, so that the restoration of a local damaged soil ecological system is accelerated, and the ecological function restoration of the soil in the rare earth ore tailing sand land is realized.

The invention relates to a spherical micron phosphate fertilizer with high fertilizer efficiency and a preparation method thereof. The preparation method of the spherical micron phosphate fertilizer with high fertilizer efficiency comprises the following steps: reacting a crystal form control agent and monocalcium phosphate in water for at least 12 hours, and performing spray drying through a spray dryer to obtain the spherical micron phosphate fertilizer. According to the spherical micron phosphate fertilizer with high fertilizer efficiency and the preparation method thereof, the preparation method is simple, the cost is low, the reaction conditions are mild, and the prepared spherical micron phosphate fertilizer is small in size and high in fertilizer efficiency.

The invention discloses a slow-release bacterial fertilizer as well as a preparation method and application thereof, and relates to the technical field of biotechnology. Comprising the following steps: step 1, preparing a bacterial liquid of bacillus cereus, a bacterial liquid of lysinibacillus slender, a bacterial liquid of acinetobacter schiffei, a bacterial liquid of stenotrophomonas maltophilia, a bacterial liquid of sphingobacterium alcohovorans and a bacterial liquid of bacillus licheniformis into a mixed bacterial suspension according to a volume ratio of 1: (1-2): (1-2): (1-2): (1-2): (1-2); 2, mixing the mixed bacterium suspension with an embedding agent and a cross-linking agent to obtain a first mixed colloid; step 3, embedding the first mixed colloid into the second mixed layer to obtain first compound fertilizer particles; and step 4, embedding the first compound fertilizer particles into a fermented third mixed layer to obtain the slow-release bacterial fertilizer. The prepared slow-release bacterial fertilizer improves the remediation effect of organic phosphorus contaminated soil. The soil fertility is improved, and a good growth promoting effect on plants is achieved.

The invention provides a two-phase aerobic fermentation device and an application method thereof. The device integrates a raw material pretreatment system, a feeding system, an aeration system, a stirring system, a heating and heat preservation system, a leachate backflow system, a decomposition bin, a decomposition bin, a waste gas treatment system and an intelligent control system. The method comprises the following steps: S1, raw material pretreatment; s2, metering and feeding the raw materials; s3, performing high-temperature aerobic decomposition; s4, medium and low temperature post-decomposition; s5, waste gas collection treatment; and S6, product discharging quality control. According to the method, aerobic fermentation is divided into a catabolism phase and an anabolism phase by taking a high-temperature period in a typical aerobic fermentation temperature change curve as a boundary, and decomposition-anabolism of aerobic microorganisms is enhanced by regulating and controlling a microenvironment in a split-phase manner, so that the aerobic biological treatment efficiency is effectively improved, and retention of different functional bacteria in a system is facilitated. The bottleneck problems of large occupied area, long period, low fertilizer efficiency, low functional strain preservation amount and the like of aerobic fermentation are solved, and safe and efficient resource conversion is realized.

The invention relates to the technical field of environmental protection, and particularly discloses a method for preparing planting soil from artificial gravel sewage mud cakes and application of the planting soil. During treatment, the mud cakes are crushed, mixed with quick lime and aged for 7 days or above; and adding sulfur powder, an organic fertilizer and magnesium sulfate into the obtained material, and mixing to obtain the planting soil. The mud cake is treated, the pH value of the mud cake is reduced, the cation exchange capacity of the mud cake is improved, the non-capillary porosity is reduced, and the content of medium trace elements is adjusted, so that the mud cake can be suitable for landscaping planting soil.

The invention discloses a gamma-polyglutamic acid synergistic dyeing diammonium phosphate fertilizer as well as a preparation method and application thereof, the preparation method comprises the steps of gamma-polyglutamic acid fermentation liquor preparation, fertilizer dyeing and fertilizer forming, and the prepared diammonium phosphate fertilizer comprises gamma-polyglutamic acid fermentation liquor, a diammonium phosphate fertilizer and a yellow dye. Compared with the prior art, the coloring agent and the dye of the diammonium phosphate fertilizer are low in dosage, the coloring cost is effectively reduced, the coloring operation is simple, the existing production process and equipment are not required to be greatly adjusted, the market competitiveness of the product is further improved, the fertilizer efficiency of the diammonium phosphate is improved, and the production cost is reduced. The fertilizer has an obvious promotion effect on growth, development and yield improvement of crops.

The invention discloses humic acid-based coated slow-release potassium chloride and a preparation method thereof, and belongs to the technical field of biological slow-release organic and inorganic fertilizers. The fertilizer comprises the following raw materials in parts by weight: 40-55 parts of potassium chloride, 6-8 parts of humic acid, 6-9 parts of urea, 0.5-0.8 part of trace elements and 3.5-5.5 parts of a slow-release porous coating material. According to the invention, ethylenediamine and maleic anhydride are used as raw materials to prepare a functional monomer containing carboxyl and amino groups at the same time, an effective coating material enables the potassium fertilizer to release potassium ions in soil more slowly and uniformly, and the utilization efficiency of potassium is improved. The sustained-release potassium chloride disclosed by the invention has an extremely strong potassium chloride sustained-release effect on one hand, provides sufficient potassium for crops, and can effectively regulate the ecological activity of soil and improve the utilization rate of the potassium on the other hand.

The invention relates to the technical field of fertilizers, and discloses a fertilizer composition and a preparation method thereof.The fertilizer composition is prepared from cow dung, waste straw, plant ash, coco coir, ammonium humate, cellulose, a polyglutamic acid complex, a biological fermentation material, urea and an anti-caking agent, kitchen waste is used as a fermentation source for fermentation, the biological fermentation material is prepared, and the anti-caking agent is added into the biological fermentation material; and the polyglutamic acid complex is one of the components of the fertilizer, can relieve the treatment pressure of the kitchen waste, realizes cyclic utilization of the kitchen waste, is beneficial to environmental protection and resource saving, can improve the cation exchange capacity of soil, gathers nutrients in the soil, and achieves the effect of increasing the fertilizer efficiency. The overall utilization rate of the fertilizer is improved. Through reasonable proportioning of the components, the fertilizer can provide rich and comprehensive nutrient substances for plants, is rapid and lasting in fertilizer efficiency, does not cause fertilizer damage, and has obvious yield-increasing and capital-saving effects.

The invention discloses a low-energy-consumption green preparation process of a glycine fermentation broth fertilizer, and relates to the technical field of fertilizer production, the low-energy-consumption green preparation process comprises the following specific steps: step 1, placing a glycine fermentation broth in a fermentation container, and fermenting by adopting a low-temperature long-time fermentation mode, the method has the advantages that the glycine fermentation broth from different sources is preliminarily mixed according to the proportion, then the humic acid and the seaweed extract which are subjected to high-temperature sterilization treatment are gradually added, all the components are fully fused in the mixing process, in addition, the preliminarily mixed glycine fermentation broth from different sources needs to be pretreated before being mixed, and the mixing effect is good. And impurities and suspended matters are removed, and the added natural organic substances humic acid and seaweed extract are subjected to high-temperature sterilization treatment, so that the nutritional ingredients of the fertilizer are more balanced and stable, the nutritional requirements of different plants in different growth stages can be better met, the fertilizer efficiency of the fertilizer is improved, the growth of the plants is promoted, and higher benefits are brought to agricultural production.

The present application relates to the technical field of fertilizer, in particular to an organic leaf fertilizer and a production method thereof.The present application solves the problems of poor fertilizer efficiency and easy damage to soil structure.The present application improves the soil organic matter content of the organic leaf fertilizer by changing the dosage of kelp, the temperature and time of ultrasonic and the dosage of kelp extract; improves the relative content of plant chlorophyll of the organic leaf fertilizer by changing the dosage of earthworms, trypsin and amino acid extract; improves the soil porosity of the organic leaf fertilizer and reduces the soil bulk density by changing the dosage of shrimp shells, the temperature of removing protein and the dosage of chitosan extract; increases the plant leaf thickness of the organic leaf fertilizer by changing the dosage of straw and the dosage of cellulose extract; and improves the fertilizer utilization rate of the organic leaf fertilizer by changing the temperature and time of stirring and the time of emulsification and grinding.

The invention relates to the technical field of sustained and controlled release nitrogen fertilizers, and discloses a sustained and controlled release nitrogen fertilizer applied to crops in arid regions, which comprises the following raw materials in parts by weight: 22-28 parts of ammonium nitrate, 18-22 parts of urea, 12-18 parts of ammonium chloride, 6-9 parts of monoammonium phosphate, 6-10 parts of humic acid, 6-10 parts of zeolite powder, 4-6 parts of a water-retaining agent, 1.5-2.5 parts of a nitrification inhibitor, 5-10 parts of a coating material and 1-5 parts of a trace element mixture, the coating material is prepared from 22 to 28 parts of chitosan, 12 to 18 parts of polylactic acid, 6 to 9 parts of bentonite and 11 to 14 parts of polyacrylamide. The nitrogen fertilizer is slowly released through coating treatment, volatilization and leaching loss of nitrogen elements are reduced, the humic acid and the zeolite powder can improve the soil structure, improve the water and fertilizer retention capacity of soil, effectively lock water, reduce water evaporation and fertilizer loss and reduce rapid loss and waste of the nitrogen elements, and therefore the utilization rate of the fertilizer is increased, and the fertilization cost is reduced.

The invention belongs to the field of liquid fertilizers, and particularly relates to a method for promoting bright colors of flowers by using a lincomycin finished product liquid fertilizer, which comprises the following steps: diluting lincomycin dry powder according to a mass ratio of 1: 100 to obtain a lincomycin finished product liquid; the method comprises the following steps: carrying out aerobic culture in a liquid culture medium containing starch, yeast powder, soybean meal, yeast extract and inorganic salt, supplementing ammonium ions in the lincomycin fermentation process, and controlling the fermentation time to be 36-110 hours, so as to obtain lincomycin fermentation liquor; dissolving urea, potassium chloride, zinc sulfate and the iron fulvic acid solution in water, and uniformly mixing to prepare a nutrient solution; the method comprises the following steps: treating zeolite with the fineness of 200 meshes at a high temperature of 200 DEG C; airing or drying the zeolite until the water content of the zeolite is reduced to be not higher than 5%; according to the lincomycin finished product liquid fertilizer disclosed by the invention, the flowering period is effectively prolonged, so that the bright color effect of flowers is promoted.

The utility model relates to the technical field of chemical fertilizer production, and discloses an organic fertilizer production extrusion granulator which comprises supporting legs, an outer box is fixedly installed at the tops of the supporting legs, a motor box is fixedly installed on the left side of the outer box, and a collecting box is fixedly installed at the bottom of the right side of the outer box. A stirring box is fixedly mounted at the top of the outer box, and an extrusion box is fixedly mounted in the outer box. Through the arrangement of the rack, the rack and the blade, the rack is meshed with the gear, the blade can be cleaned every time the blade ascends to the topmost end, and therefore the overall quality of products is improved, the defective product rate caused by sticky objects on the blade can be reduced, cost is saved, and the production efficiency is improved. Blade damage and machining quality reduction are avoided, customer satisfaction and brand image can be improved, and the service life of equipment is prolonged.

The invention belongs to the field of organic fertilizer and microbial fertilizer manufacturing, and particularly relates to a saline-alkali soil conditioner and application thereof in the technical field of saline-alkali soil conditioning. The invention provides a saline-alkali soil conditioner. The saline-alkali soil conditioner comprises the following components: a nitrogen fertilizer, a phosphate fertilizer and a synergist. Urea and ammonium sulfate in nitrogen fertilizer of the saline-alkali soil conditioner cooperate with acidizing rhizosphere to promote rhizosphere salinity reduction, different types of phosphatic fertilizers are mixed to improve the fertilizer efficiency of phosphatic fertilizers in salinized soil, and a carbon source and a synergist are matched to strengthen the microbial function of the soil. When the soil conditioner is applied, the activity of soil microorganisms can be stimulated, the soil acidity and alkalinity can be improved, and nutrient turnover can be promoted. When the conditioner disclosed by the invention is applied to the salinized soil, the contents of nitrogen, phosphorus and potassium at the overground part of crops can be increased, and the growth of the crops is promoted.

The application belongs to the technical field of fertilizers, and particularly relates to a humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate and a preparation method thereof. The humic acid organic-inorganic compound fertilizer comprises the following raw materials in parts by weight: 22-30 parts of biogas residue, 35-55 parts of humic acid, 8-13 parts of fine columnar algae powder, 5-8 parts of urea, 12-17 parts of ammonium sulfate, 12-15 parts of superphosphoric acid calcium, 15-20 parts of potassium sulfate and 10-15 parts of slow release coating suspension. Test results show that the humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate prepared by the application can reduce the nitrogen and phosphorus release rates of the humic acid inorganic compound fertilizer, has better slow release effect, significantly promotes the plant height, stem diameter and root length of soybeans and corn, has obvious growth promotion effect, and has wide application prospect.

The invention discloses a multi-element carbon-based microbial blended fertilizer for rice quality improvement and yield increase, and relates to the technical field of fertilizers, and the multi-element carbon-based microbial blended fertilizer comprises the following raw materials by weight: 10-20 parts of a multi-element carbon source, 40-50 parts of a compound fertilizer, and 1-1.5 parts of a vermiculite-loaded microbial agent. The vermiculite-loaded microbial agent is prepared from modified vermiculite-loaded nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and growth-promoting bacteria, so that the microbial strains can be slowly released and maintain the activity, and the activity of microbial flora can be durably promoted by combining a multi-element carbon source and a compound fertilizer; the flora activity promotes the release and absorption of multi-element carbon source nutrients, and the fertilizer efficiency of the microbial blended fertilizer is effectively prolonged, so that the rice quality improvement and yield increase are promoted.

The invention belongs to the field of agricultural fertilizers, and provides a micro-mineral activator and an application thereof in improving the fertilizer efficiency of a bio-organic fertilizer. According to the invention, epoxy silane coupling modified potassium feldspar powder is adopted as a core to construct a two-phase collaborative design of humic acid coated core-shell composite powder IM-X and metal ion crosslinked microgel powder IM-Y; the balance between the compressive strength of the particles and the rapid disintegration and dispersion performance when encountering water is realized, the consideration of a high-solid-content low-water-adding-amount granulation process window and the rheological stability of a humic acid cross-linked network is considered, and the unification of moisture absorption and caking resistance during storage and transportation and water absorption and retention ion response regulation and control functions after application is realized; the mineral-organic composite additive solves the performance coupling contradiction of natural conflicts in physical and chemical mechanisms of the existing mineral-organic composite additive, has the advantages of good processing controllability, excellent storage and transportation stability and remarkable fertilizer efficiency improvement effect, and has wide application value in the field of bio-organic fertilizer synergism.

The invention discloses a nano-hydroxyapatite / carbon ball composite fertilizer and a preparation method thereof, and belongs to the technical field of composite fertilizers. The invention adopts waste biomass containing sugars as raw materials, couples the extraction process of sugar substances with the synthesis process of nano-hydroxyapatite, has no waste acid discharge, does not need to use organic solvents, has a short process flow, and is green and environmentally friendly. The sugar substances are derived into carbon balls through hydrothermal reaction, and at the same time, the phosphorus source and calcium source in the precursor are self-assembled into rod-shaped nano-hydroxyapatite on the surface of the carbon balls, and the nano-hydroxyapatite load is stably loaded on the surface of the carbon balls without agglomeration. After the composite fertilizer is applied, under the action of crop root secretions, the hydroxyapatite nanorods fall off from the surface of the carbon balls and are directly absorbed by the crops, which can effectively prevent phosphorus from being fixed by the soil, thereby improving the utilization rate of the phosphorus element, and then improving the fertilizer effect of the nano-hydroxyapatite / carbon ball composite fertilizer.

The invention relates to value-added urea for spring corn base fertilizer and a preparation method thereof. The preparation method comprises the following steps: sequentially and alternately adding the urea long-acting material and the urea conversion-promoting material into urea liquid at the same position according to the interval time of 6-10 minutes, so as to obtain the value-added urea for the spring corn base fertilizer. The invention aims to solve the problem that one-time production of the value-added urea for the spring corn base fertilizer on a urea production device is realized by sequentially and alternately adding a urea long-acting material and a urea conversion promoting material into a urea liquid, and secondary processing is not needed.

The invention discloses a preparation method of a microalgae biofilm microprotein organic water-soluble fertilizer. The preparation method comprises the steps of microalgae biomass pretreatment, deep conversion and enzymolysis, microbial biofilm treatment, feed liquid concentration and blending and by-product treatment. Microalgae biomass is treated through acid-base wall breaking dissolution, advanced oxidation and proteolysis, a microbiological membrane is treated through calcium peroxide heating wall breaking, enzyme (MBE-3) enzymolysis and plate-frame pressure filtration, microprotein feed liquid is obtained and concentrated and blended into an organic water-soluble fertilizer, and by-products are dried to serve as the soil conditioner. According to the method, efficient conversion and full-value utilization of microalgae and microbial biological membrane resources are achieved, the protein extraction rate and the product fertilizer efficiency are improved, the process integration is high, and the ecological and economic benefits are remarkable.

The invention belongs to the technical field of compound fertilizers, and particularly relates to a compound fertilizer microbial fertilizer as well as a preparation method and application thereof. The preparation method of the compound microbial fertilizer comprises the following steps: respectively fermenting livestock slaughtering wastes, livestock wastes, waste melons and fruits and eggshells to obtain a solution a, a solution b, a solution c and a solution d; mixing the obtained solutions in proportion, adding molasses, bacillus subtilis, EM bacteria and trichoderma harzianum, fully mixing, and carrying out secondary fermentation to obtain a compound microorganism stock solution; and adding the nitrogen-phosphorus-potassium inorganic fertilizer and the compound microorganism stock solution, and fully stirring to obtain the fertilizer. The invention discloses a compound microbial fertilizer prepared by a preparation method, which is used for solving the problems of soil hardening, acidification and plant diseases and insect pests caused by chemical fertilizer application, soil quality improvement, harmful substance reduction and fertility improvement.

The present invention discloses a method for preparing a slow-release phosphate fertilizer from ammoniated slag produced by monoammonium phosphate, which specifically includes the following steps: step 1: adding phosphoric acid or phosphate-containing salts to the ammonated slag, adjusting the mixture of citric acid-soluble phosphorus: water-soluble phosphorus to 0.5-1.5:1, controlling the ratio of the mass of sulfur, magnesium, iron, and calcium in the mixture to the mass of P2O5 in the mixture to 0.1-0.3:1, controlling the pH of the mixture to 1-4, and then adding urea to adjust the molar ratio of P2O5:N to 2-3:1, and heating to obtain a mixed slurry after the urea is dissolved. The present invention converts part of the orthophosphate in the ammonated slag into ammonium polyphosphate by controlling the polymerization conditions, while ensuring that the proportion of effective phosphorus is as high as 97% to 100%, and the ammonium polyphosphate chelates the medium and trace elements in the ammonated slag during the polymerization process. The polyphosphate in the prepared polymorphic phosphate fertilizer containing medium and trace elements has the characteristics of long-term slow release and high utilization rate, and the chelated medium and trace elements are more easily absorbed by plants, which greatly improves the fertilizer effect of the ammonated slag and realizes the added value of industrial-grade ammonium polyphosphate.

The invention discloses a drum granulation method for a water-soluble compound fertilizer. The drum granulation method comprises the following steps: (1) crushing raw materials of a basic fertilizer; (2) uniformly stirring the crushed raw materials and a water-soluble modified starch solution to obtain a uniform mixture; (3) putting the obtained uniform mixture into a rotary drum granulator, and granulating to obtain a fertilizer particle mixture; (4) feeding the fertilizer particle mixture into a drying cylinder for drying treatment to obtain a dried fertilizer particle mixture; (5) performing primary cooling and secondary cooling on the dried fertilizer particle mixture to obtain a cooled fertilizer particle mixture; and (6) carrying out primary screening and secondary screening on the cooled fertilizer particle mixture to prepare a qualified fertilizer particle finished product. According to the invention, the physical properties and nutrient utilization rate of the fertilizer are improved by accurately controlling the use amount of the drum granulation raw materials of the water-soluble compound fertilizer and optimizing process parameters; and through the synergistic effect of the raw materials, the product quality can be obviously improved.