4360results about How to "Improve fertilizer efficiency" patented technology

The present invention provides a microbe composition, tobacco-dedicated biological organic fertilizer containing the composition, its usage method. The microbe composition comprises aztobacter sp., pseudomonas fluorescence, Bacillus megaterium, bacillus mucilaginosus and bacteria capable of preventing and treating plant disease and insect pests. The microbe composition is mixed according to proportion with oligochitosan, lignite, grass charcoal, and bean cake and fermented to make bacteria powder fertilizer, and further added with potassium-enriching shale, bentonite and water-keeping agent to make bacteria granule fertilizer. The tobacco-dedicated biological organic fertilizer contains the above-mentioned bacteria powder fertilizer and granule fertilizer which contains natural mineral and good organic substance, C / N value being large, which fit the growth rule of tobacco plant and promote potassium fertilizer efficiency and possesses long-lasting potassium-supply capability and provides effective ingredient for tobacco.

The invention discloses slow-release fertilizer with the effect of soil remediation, which is prepared by polyhydroxyalkanoates which can be completely biodegraded, organic and inorganic nutrients and other substances, by slow-releasing the organic and inorganic nutrients, microorganism propagation and sustained and rapid growth of plants can be promoted, the bioactivity and water solubility of polycyclic aromatic hydrocarbons are quickened, and simultaneously, the defects of fertilizer loss and repeated fertilization can be avoided, thereby saving the cost and enhancing the soil remediation efficiency. The invention also discloses a soil pollution remediation method by utilizing the slow-release fertilizer, plants with the remediation effect are planted in the soil with the slow-release fertilizer, and efficient, environment-friendly and sustained remediation of the soil polluted by the polycyclic aromatic hydrocarbons (PAHs) can be realized by utilizing the microorganism-plant remediation technology.

The invention discloses a water soluble fertilizer and a production method thereof, in particular to a water soluble humic acid multi-element solid fertilizer and a production method thereof. The water soluble humic acid multi-element solid fertilizer is made by mixing water soluble humic acid, water soluble nitrogenous fertilizer, water soluble phosphorous fertilizer, water soluble potassic fertilizer and water soluble complex trace elements. Compared with the prior art, the water soluble humic acid multi-element solid fertilizer can reduce the transporting and packing cost, can be rapidly dissolved without agglomeration when in use, is applied along with water, and has the advantages of strong points, high nutrient content, complete nutrition, good water-solubility, combination of organic and inorganic matters as well as high effect of fertilizer and utilization rate. The utilization rate of product nitrogen reaches 60%, the utilization rate of phosphorus is 30-35%, and the utilization rate of potassium is 60-70%, so that the fertilizer application utilization rate is increased by more than 10% compared with the conventional fertilizer.

The invention belongs to the technical field of bio-organic fertilizer production, and provides slowly-releasing water conservation biological organic and inorganic compound fertilizer particles and a production method thereof. The fertilizer has the advantages of reasonable structure, unique processing technique, scientific formulation, high fertilizer effect, improved soil physical condition, convenience application, and wide application scope; high-grade bio-organic fertilizer meeting the requirements of organic agricultural vegetable, fruits or food production, or fertilizer having special functions of drought resisting, saline and alkaline resisting and continuous cropping resisting and capable of specially meeting fertilizer requirement rules of various crops can be further designed and developed. The fertilizer effect playing way in the invention is unique, and component parts such as probiotics, inorganic nutrients, regulatory factors, organic matter and the like can be respectively played in time and space. Through the design to fertilizer particle structure and formula, the advantages of organic matter, high concentration of inorganic fertilizer, slowly-releasing efficiency and the special effects of beneficial microorganisms are integrated and slowly-releasing water conservation biological organic and inorganic compound fertilizer particles can be the first choice in replacing organic and inorganic compound fertilizers, compound fertilizers and inorganic slow release fertilizers.

The invention provides a specialized organic / inorganic composite biological medicine fertilizer for watermelon, and a preparation method thereof. The weight parts of composition raw materials are as follows: 50-70 parts of sludge produced by sewage treatment, 20-30 parts of tree ash, 30-40 parts of watermelon vines, 20-30 parts of cow manure, 15-20 parts of bagasse, 5-7 parts of fishbone dust, 8-10 parts of oil cakes, 10-15 parts of the tree ash, 10-15 parts of phosphorus slag, 8-10 parts of poultry feather, 8-10 parts of monoammonium phosphate, 10-12 parts of triple superphosphate, 12-15 parts of potassium chloride, 2-4 parts of carboxymethyl chitosan, 20-30 parts of modified bentonite, 10-12 parts of decomposed coal, 2-4 parts of seven leaf clover, 9-11 parts of angled bittersweet, 8-10 parts of capillary artemisia, 5-7 parts of fructus cnidii, 6-8 parts of fructus quisqualis, 3-5 parts of wormwood, 3-5 parts of litsea cubeba, 8-10 parts of daturae flower powder, 3-5 parts of paraffin, 1-1.25 parts of zinc sulfate, 2-3 parts of ferrous sulfate, 0.8-1.2 parts of borax, 10-12 parts of potassium fulvic acid, 3-4 parts of chili oil and 0.2-0.5 part of EM strains. A green organic fertilizer is obtained by mixing a plurality of organic wastes and fermenting the mixture, thereby reducing environment pollutions. The specialized organic / inorganic composite biological medicine fertilizer for the watermelon has the advantages of comprehensive nutrition and enhanced sterilizing effects by mixing the fermented organic materials and inorganic fertilizer and adding medicine juice of the Chinese herbal medicine having insectidical functions. With the application of the fertilizer, watermelon quality can be effectively increased; and the watermelon has green leaves, bright flower, prolonged flowering period and increased output.

The invention relates to a fertilizer and soil conditioner, wherein the compound fertilizer contains a slow-release fertilizer additive adjustable based on soil and plant requirement, which comprises compound microorganism - organic carrier 2-50%, inorganic carrier 1-30%, ureacondensate 1-50%, primary nutrient 1-60%, trace element 1-10%, and inorganic soil conditioner 1-50%.

The invention discloses a method for preparing organic fertilizer from paper-making sludge. The materials such as paper-making sludge, amendment are mixed, subjected to high-temperature aerobic fermentation, post maturation and crushing, screened, and mixed with fertilizer of nitrogen, phosphorus, potassium and the like and medium and micro elements to prepare the organic fertilizer. The method has the advantages of simple process, easy operation, obvious innocuous effect, no environmental pollution and little nutrient loss; and the organic fertilizer prepared by the method is widely applied to industrial crops such as vegetables, fruit trees, Chinese herbal medicines, flowers and field crops such as wheat, corn, paddy rice.

The invention discloses a fertilizer slow-release synergistic agent and a preparation method thereof. The fertilizer slow-release synergistic agent comprises the following raw materials in percentage by mass: 0.1-20 % of polyaspartic acid and slat thereof, 0.1-10 % of urease inhibitor, 0.1-30 % of nitrification inhibitor, 0.03-5 % of plant growth regulating agent, 10-35 % of soil regulating agent and 10-80 % of carrier. The fertilizer slow-release synergistic agent disclosed by the invention is mainly used for the slow-release synergism of a compound mixing fertilizer, is increased in the utilization rate of the fertilizer, and is capable of effectively improving the soil, and the soil moisture can be preserved; and when the fertilizer slow-release synergistic agent is used, the fertilizer slow-release synergistic agent can be added into a material feeding system or an enveloping drum together with the fertilizer raw materials and mixed with the fertilizer raw materials, the effect of slow-release synergism can be realized, and the dosage of the fertilizer slow-release synergistic agent is 4-8 kg per ton fertilizer.

The invention relates to a charcoal based plant cultivation substrate and a preparation method thereof, and belongs to the technical field of soilless culture. The invention adopts the specific scheme that: after being dried, biomass material is pyrolyzed to form charcoal particles under an anoxic and heating condition, potassium dihydrogen phosphate is used for neutralizing the alkalinity of the charcoal particles and filtering and drying are performed, and after a certain amount of inorganic fertilizer is added, the charcoal particles are fully mixed with inorganic filling material, organic filling material and organic fertilizer, namely the charcoal based plant cultivation substrate is obtained. The invention has the advantages that the physical chemical property is excellent, the nutrients are complete, the fertilizer efficiency is lasting, the moisture adjusting capability is strong, the cost is low, the ecological benefits are high, the suitability is strong, the application range is wide, and the charcoal based plant cultivation substrate is suitable for cultivation of various plants.

The invention provides a Chinese medicine residue organic fertilizer. Wastes after extraction of Chinese traditional medicines can be fully utilized, utilization of waste materials is realized, and a bactericidal and insect disease preventing organic fertilizer full of nutritional ingredients is also provided for agricultural production. The Chinese medicine residue organic fertilizer is prepared by fermenting Chinese medicine residue, excrement of animals, solid waste, bacillus subtilis and EM. The Chinese medicine residue organic fertilizer has the advantages that the Chinese medicine residue, excrement of animals and solid waste are mixed, biological fermentation bacteria are added for carrying out rapid fermentation, organic fertilizer is processed, waste materials are changed into things of value, harm is turned into good, the problem of treatment of abandoned herb residue produced by a Chinese medicine factory is solved, and waste treatment cost is also greatly reduced, so that a win-win situation of environmental protection and economic development is realized. By adopting the organic fertilizer made from the Chinese medicine residue, soil can be effectively improved, crop pest also can be effectively prevented, and quality, yield and safety of crops are improved.

The invention discloses a compound fertilizer special for sugarcanes and a production method thereof. Raw materials of the compound fertilizer special for the sugarcanes comprise inorganic fertilizers, organic fertilizers, compound amino acid, secondary elements and microelements. Weight percentage of each component in total weight of the compound fertilizer special for the sugarcanes is that the inorganic fertilizers occupy 16%-29%, the organic fertilizers occupy 15%-30%, the compound amino acid occupies 5%-15%, the secondary elements occupy 0.1%-0.5%, and the microelements occupy 0.03%-0.1%. The compound fertilizer special for the sugarcanes can promote nitrogen, phosphor, potassium and other nutrient elements to transfer and gather from mature portions of the sugarcanes to growing portions of the sugarcanes, and improves content of the nutrient elements in sugarcane stem growing portions and sugarcane leaves, thereby promoting growing of the sugarcanes and synthesizing and accumulating of cane sugar, and improving per unit yield, sugar content and economic benefit.

The invention discloses bio-organic fertilizer, and belongs to the technical field of organic fertilizer. The proportion by weight of all raw materials of the bio-organic fertilizer is dried chicken manure : edible mushroom : compound microbial agent : corn flour or rice bran : functional strain = 110-140 : 390-360 : 0.1-0.5 ; 0.1. The compound microbial agent comprises mould, bacillus, lactic acid bacteria, actinomycetes and saccharomycetes. The strains are efficient viable bacteria. Each gram of the compound microbial agent comprises the number of the mould ranges from 5 hundred million to 8 hundred million, the number of the efficient viable bacteria of bacillus ranges from 12 hundred million to 15 hundred million, and the number of the actinomycetes ranges from 10 hundred million to 12 hundred million and the saccharomycetes of 15 hundred million to 18 million. According to the bio-organic fertilizer, the chicken manure and mushroom dregs serve as main materials, and the high-quality organic fertilizer can be fermented quickly by adding the compound microbial agent and the functional strain.

The invention provides a method producing the organic-inorganic compound fertilizer by the molasses fermentation waste liquor and the lime sludge, which relates to a method producing the fertilizer through fermentation and solves the problem of reclaiming and processing the molasses fermentation waste liquor continuously on a large scale. The method of the invention is that the biological humic acid with weight per cent of 0.4 per cent to 0.6 per cent and made by the bagasse is mixed with the lime sludge of 65 per cent to 68 per cent, bagasse powder of 10 per cent to 12 per cent, wheat bran of 1.5 per cent to 2.5 per cent and regulator of 16 per cent to 25 per cent to ferment fully and continuously in a shorter time. The fermented materials with water of 10 per cent to 12 per cent are gained after opening and drying and are crushed into the lime sludge organic fertilizer. The molasses fermentation waste liquor with water of 90 per cent is condensed to the hyperconcentration liquor with water of 26 per cent to 28 per cent by the three-effect forced circulating concentration system and then through the two-effect scraping and steaming hyperconcentration system. The hyperconcentration liquor of 30 per cent to 33 per cent and the biological humic acid of 9 per cent to 10 per cent are stirred and mixed uniformly based on the weight per cent and are added with the fertilizer of 32 per cent to 34 per cent and the lime sludge organic fertilizer of 25 per cent to 27 per cent to stir to produce the organic-inorganic compound fertilizer through dry extrusion and prilling.

The invention discloses a degraded natural organic bundle slow release fertilizer, which comprises the following steps: comprising easy soluble nitrogen particle fertilizer; coating natural organic bundle slow release with the main element as lignin; coating vegetable fat film layer out of nature organic film layer as sealer; bruising the nature organic matter with the main element below 60 order as coating material; adopting normal disc pelleting method; sticking the coating material to the surface of easy soluble nitrogen fertilizer particle; drying; spraying vegetable fat as sealer; getting the product. This fertilizer is very cheap, which can be used to cotton, corn, wheat, flower and lawn.

The invention relates to a medium for culturing fruits and vegetables or cultivating straw, which is characterized in that the medium consists of materials of the following volume proportion: 35-80 percent of straw leavening, 0.2-0.5 percent of chemical fertilizer, and 19.5-64.8 percent of base material, wherein, the base material is one or more of grass carbon, perlite or vermiculite, or either grass carbon or river sand. The invention provides a manufacturing method for the medium culturing fruits and vegetables or cultivating straw, which includes: 1) fermentation of the straw; 2) proportioning of materials. The manufacturing method adds a small amount of excrement of animals and even ferments with organic material-decomposing agent; the decomposed mixture is mixed with the grass carbon and fertilizer (three-element compound fertilizer or carbamide, ordinary superphosphate, diammonium phosphate) according to certain proportion to prepare the seedling culture or cultivation medium; the growth of the fruit and vegetable seedlings are good, the cost is reduced and the dependence on mineral is reduced at the same time.

The invention relates to a nitrogen fertilizer, in particular to a synergistic slow-releasing nitrogen fertilizer and a preparation method thereof. The fertilizer comprises: urea nitrogen fertilizer, biochemical inhibitors and a synergist, wherein, the weight portion ratio of the urea nitrogen fertilizer to the biochemical inhibitors to the synergist is equal to 1:0.001 to 0.1:0.0005 to 1; the biochemical inhibitors are a nitrification inhibitor and a urease inhibitor and the synergist is poly (aspartic acid), wherein, the weight portion ratio between the urease inhibitor and the nitrification inhibitor is equal to 0.5 to 2:0.5 to 2. The preparation method is as follows: during the operation process of the nitrogen fertilizer, the biochemical inhibitor and the synergist are added into the fertilizer under the molten state of the fertilizer. The synergistic nitrogen fertilizer of the invention is suitable for various plants and soils. The fertilizer has notable disease-resistant, drought-resistant and lodging resistant effects on crops after being applied in soils, can effectively improve nutrients reserving power of soils and has certain effect on succession crops. Gain production can be increased by 8% to 30%, vegetable production can be increased by 14% to 60% and cash crop production can be increased by more than 30% by using the synergistic slow-releasing nitrogen fertilizer.

The present invention is process of twice fermenting garbage-sludge mixture to produce microbial fertilizer. The production process can eliminate environment pollution caused garbage and sludge while providing environment friendly efficient microbial fertilizer. The produced microbial fertilizer has high fertility, beneficial bacteria content up to 10<8>-10<10> / g and various bioactive matters. The produced microbial fertilizer can promote the growth of crop, strengthen the disease resistance of crop and raise yield of crop.

The invention relates to saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer has a low cost and high fertilizer efficiency, is economic and environmentally friendly, improves a soil water binding capacity and permeability, and has functions of keeping fertility, slowly releasing fertilizer and reducing paddy rice salinization. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer comprises biomass charcoal, chicken manure, pyroligneous liquor, fermented soybean meal and potassium humate. The biomass charcoal is prepared by thermal cracking charring of biomass raw materials under anoxic conditions. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer can be used for paddy rice plantation, can improve a saline-alkali soil environment and can improve an organic paddy rice yield.

The invention discloses a method to prepare leaven of fertilizer and application, which is characterized by the following: allocating raw material with mass ratio at 10-80 wt industrial residue of ferment, 5-30 wt straw, 5-30 wt cake meal, 10-30 wt bran or rice bran, 1.5-2 wt aquacare, 0.5-1 wt NaCl and or amylaceum, and 1-30 wt brown ball Azotobacter (Azotobacter chroococcum), 1-30 wt bacillus megaterium (Bacillus megaterium), 1-30 wt bacillus licheniformis (Bacillus licheniformis), 1-30 wt plant lactobacillus (Lactobacillus plantarum) and 1-30 wt 1-5 strain of saccharomycopsis fibuligera (Saccharomycopsis fibuligera); producing the product.

The invention relates to a preparation method for a high-activity humic acid biofertilizer. The high-activity humic acid biofertilizer comprises 97-99% of humic acid bio-organic fertilizer, 0.2-3% of special functional bacteria, and 0.1-0.3% of activator. The high-activity humic acid biofertilizer has high quality of organic matter nutrient, is excellent in soil conditioning function, has stable effect and long fertilizer efficiency, has balanced and complete nutrient, comprises multiple inorganic components needed by crops, has high fertilizer efficiency and can promote the growth of the crop and improve the yield and quality, has good disease resistance effect, improves the root system environment of the crop, improves the nutrient absorption of the crop, develops the root system of the crop, and enhances the stress resistance of the crop. After the high-activity humic acid biofertilizer is used by a peasant, a good planting effect can be obtained, and the yield and income are increased, so that the high-activity humic acid biofertilizer is used for producing environment-friendly and organic food.

The invention relates to a plant culture medium and a module thereof. The medium is characterized by comprising following raw material including 20-40 parts by weight of peat soil, 15-25 parts by weight of compost excrements of livestocks, 15-25 parts by weight of humic acid, 10-25 parts by weight of nitrogen-phosphorus-potassium mixed fertilizers, 3-15 parts by weight of expanded perlites, 3-15 parts by weight of shiitake fungus or fermented straw fine fibers, 3-10 parts by weight of amino acid, 0.1-3 parts by weight of probiotics, 0.1-3 parts by weight of protease, 0.1-3 parts by weight of marine bioactive extracts, 0.1-3 parts by weight of antimicrobial peptides, 0.1-3 parts by weight of rooting agents and 0.1-3 parts by weight of microelements. The marine bioactive extracts adopt sea algae extracts or mussel extracts. The probiotics utilize bacillus subtilis strains. The protease utilizes papain. The module is low in weight, convenient in transport, convenient in application and good in water permeability and air permeability and satisfies all kinds of nutrition needed by plants.

The invention discloses a biological mixed bacterial fertilizer and a preparation method and application thereof. The biological mixed bacterial fertilizer is prepared from, by weight, 1-20 parts of a compound bacterial agent, 300-400 parts of organic materials, 500-600 parts of inorganic materials, 800-1000 parts of chemical fertilizers, 5-10 parts of trace elements, 300-500 parts of waste liquid, 30-50 parts of amino acid salts and 50-100 parts of additives.

The invention relates to an organic rich-selenium bio-fertilizer and a preparation method thereof. The organic rich-selenium bio-fertilizer comprises the following components in percentage by weight: 10-40% of livestock / poultry excrement, 20-50% of straw powder or humus soil, 20-40% of 80-mesh selenium ore powder containing 500 ppm of selenium, 0.02-0.07% of microbial soil repairing agent and 0.01-0.03% of zymocyte. The preparation method comprises the following steps: thoroughly and uniformly stirring the raw materials and stacking for fermentation; when the temperature reaches 40 DEG C, starting to turn the pile once every two days; when the temperature reaches 65 DEG C and hyphae appear, turning the pile; stacking for fermentation for three days; and crushing, screening, packing and storing the product in a storehouse. The method provided by the invention mainly thoroughly decomposes the raw materials containing various nutrients at a high temperature under the effect of microorganisms, converts inorganic selenium into an organic selenium fertilizer for the absorption by plants and animals, and produces rich-selenium organic products.

The invention relates to a liquid compound biological fertilizer with long shelf life as well as a preparation method and application thereof. The liquid compound biological bacterial fertilizer comprises the following components in parts by weight: 2-5 parts of microbial thalli, 80-130 parts of compound nutrients, 10-30 parts of thalli protective agents and 0.5-3.0 parts of additives, wherein the microbial thalli is metered in terms of the wet weight of deposition obtained after fermentation liquor is centrifugalized, the microbial thalli include bacillus thuringiensis, bacillus megaterium, bacillus mucilaginosus and bacillus amyloliquefaciens, and the total viable count achieves 5*10<8>-5*10<9> / mL. The liquid compound biological bacterial fertilizer disclosed by the invention can be used as a biological pesticide, can be directly applied to the spraying of plant surfaces or applied to seed soaking, root irrigation, and the like, has the effects of insect resistance, phosphate solubilization, potassium solubilization, organic matter solubilization, pest resistance, and the like and is long in shelf life.

The invention relates to a process for producing organic fertilizers, in particular to a process for producing composts by employing the method of compost fermentation, wherein the process comprises: selecting filthy mud as main fermenting raw materials, adding a conditioner in the filthy mud to adjust the carbon nitrogen ratio between 15 and 30, then adding catalytic bacteria, finally performing compost fermentation, wherein the conditioner is capable of employing castoffs as animal wastes, sawdust, wooden meals, traditional Chinese medicine dregs, straws, leave and the like and the castoffs have rich organic contents. The nutrition composition of organic base material which are fermented is more reasonable via controlling carbon nitrogen ratio in the invention, and the invention uses filthy mud which urgently needs to be handled to replace the conventional night soils and straws to be main raw materials of the composts, changes waste into valuable, and has certain effect for improving urban environment.

The invention provides a composite amino acid ecological nutritious agent, which comprises sea weed fermentation liquor, fermentation liquor of animal leftover bits and pieces, trace elements, and biological bacterium. The functions of the agent include stimulating growth, suppressing pathogenic agent and reinforcing immunization.

The invention discloses a sludge aerobic composting method by utilizing composting compound microbial inoculum, which relates to a sludge aerobic composting method. The invention solves the problems of poor competitive power, long composting period and great nitrogen loss of the microbial inoculum in the prior sludge aerobic composting method. The method comprises the following steps: 1. carryingout amplification culture on microbial liquid A; 2. carrying out acclimation culture on the compound microbial inoculum A; 3. carrying out amplification culture on microbial liquid B; 4. carrying outacclimation culture on the compound microbial inoculum B; 5. taking dewatered sludge from a sewage plant, and mixing with conditioner; 6. inoculating the compound microbial inoculum, and composting; 7. and covering a layer of compound microbial inoculum B on the surface of the compost, and composting until the compost temperature reaches the ambient temperature, thereby finishing the sludge aerobic composting. The method shortens the time for the compost to reach the high temperature period by 2-3 days, shortens the composting period to 10-15 days, lowers the ammonia volatile amount of the compost by 30-50%, reduces the environmental pollution and enhances the fertilizer efficiency. The invention is applicable to sludge aerobic composting.

The invention discloses an oligosaccharide-containing foliar fertilizer composite which is characterized in that: the composite comprises oligosaccharide with effective treatment quantity and foliar fertilizer with various elements, wherein the content of the oligosaccharide is 1%-5% of the total weight of the composite; the oligosaccharide comprises chitosan oligosaccharide, sodium alginate oligosaccharide and pectin oligosaccharide; the content of the element foliar fertilizer is 5%-50% of the total weight of the composite; and the element foliar fertilizer comprises at least one of nitrogen, phosphorus, potassium, calcium, magnesium, sulphur, boron, ferrum, manganese, copper, zinc and molybdenum. The composite is applied to field crops, commercial crops and fruit and vegetable crops. The oligosaccharide which can induce plants to resist diseases and promote a root system to grow is introduced into the foliar fertilizer, so that the foliar fertilizer composite can promote the growthand the nutrient absorption of plant root systems, and has a certain control effect for restraining the happening of the diseases.

The invention relates to a method for preparing a granular compound fertilizer, which comprises the following steps of: rotating a disc granulator under the action of atomized water to wrap a mixture of attapulgite clay, urea and monopotassium phosphate on the outer layers of urea granules; adding sodium alginate powder into the disc granulator, rotating a disc to wrap the sodium alginate on the outer layer of the core of the fertilizer, spraying 5 percent aqueous solution of calcium chloride to perform cross linking with the sodium alginate, and taking the cross-linked sodium alginate as fertilizer inner layer envelopes; adding water-absorbing resin powder into the disc granulator, and rotating the disc to wrap the water-absorbing resin outside the fertilizer granules to form fertilizer outer layer envelopes; and drying the mixture to obtain the granular fertilizer. The granular compound fertilizer provides multiple nutrient elements for plants, and improves the sustained-release performance of the nutrient elements of the fertilizer. Meanwhile, the granular compound fertilizer has multiple functions of water absorption and retention, sustained release, soil regulation and the like through the combination of the fertilizer and the water-absorbing resin.

The invention relates to a manganese residue compound fertilizer and a preparation method thereof. Manganese ore leached residue is used as the main raw material, a carbonate-containing fertilizer is added to convert calcium sulfate in the manganese residue into calcium carbonate, and the manganese residue compound fertilizer is prepared from the manganese residue containing the calcium carbonate, the lignin-containing additive, and one or more of nitrogen fertilizer, phosphate fertilizer and potash fertilizer. The carbonate-containing fertilizer and the lignin-containing additive can effectively prevent soil from packing together, keep the acid-base balance in soil, and enhance the fertilizer efficiency. The invention can effectively utilize abundant manganese residue generated in electrolytic manganese industry, and provides an effective way for recycling manganese residue.