189results about How to "Fertilizer effect time is long" patented technology

A special controlled-release fertilizer for long-acting corn and its preparation method. The fertilizer core accounts for 80-92% of the total weight of the fertilizer, wherein the weight sum of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer calculated by pure nitrogen, phosphorus pentoxide and potassium chloride is the fertilizer 25%-50% of the total weight, the weight ratio is: 2-4:1-2:1-3; the coating coating accounts for 8-20% of the total weight of the fertilizer, including: 69.5-93% sulfur, 530 % polyethylene wax, 0.5-2% leveling agent. Melt sulfur, add montmorillonite and stir evenly, then add leveling agent, stir evenly to form molten sulfur. The molten sulfur and polyethylene wax are simultaneously sprayed on the surface of the fertilizer core to form a slow-release coating layer. The process occupies less land, requires less investment in equipment, and consumes less energy. It has the characteristics that one fertilization can meet the nutrient needs of corn throughout the growth period. The fertilizer effect is long and safe, and fertilization is simple.

The invention relates to a long-acting fertilizer specially used for dry-farming sweet potatoes and a preparation method for the long-acting fertilizer. The fertilizer is granular and comprises three layers of structures, namely a fertilizer kernel, a wrapping film coating layer and a water-retaining agent coating layer in sequence from inside to outside. The kernel of the long-acting fertilizer specially used for the dry-farming sweet potatoes contains effective components such as a nitrogen fertilizer, a phosphorus fertilizer, a potassic fertilizer and a composite micro fertilizer which are specially suitable for the sweet potatoes; the wrapping film coating layer controls the speed of water entering a film and controls and regulates release of nutrition; the water-retaining agent coating layer can effectively retain water in soil and rainwater; lateral seepage runoff and water evaporation are alleviated, and front and middle-stage growth of the sweet potatoes is guaranteed. The preparation method for the fertilizer is implemented through one-time spraying; the technically occupied space is small, the equipment investment is small, the preparation process is simple and the energy consumption is low; the wrapping film material is low in cost, so that the price of the fertilizer is greatly reduced.

The invention provides a special slow control / release fertilizer for an eggplant. The fertilizer is characterized by comprising, in terms of mass percent, 0.05% to 0.08% of n-butyl triamine thiophosphate, 0.05 to 0.08% of hydroquinone and 0.24 to 0.28% of dicyandiamide. According to the invention, the special slow control / release fertilizer is prepared by combining macro-element, medium-element and trace-element fertilizers like nitrogen, phosphorus, potassium, calcium, magnesium, molybdenum, boron, zinc and iron with organic fertilizers like high-quality decomposed rapeseed dregs, chicken manure and grass carbon, adding a urease inhibitor and a nitrification inhibitor and carrying out mixing; the special slow control / release fertilizer has a slow release effect in soil, is rich in a variety of nutrient elements needed in growth of the eggplant, can meet demands of the eggplant for nutrients in different growth and development phases for a long time and effectively improves output of the eggplant.

The invention discloses water-retaining slow-release fertilizer for saline-alkali soil improvement and a preparation method thereof. The preparation method comprises the following steps: mixing and stirring 0.5-1.5 parts of a urease inhibitor and 0.2-0.6 part of a nitrification inhibitor with 0.5-2 parts of gamma-polyglutamic acid, uniformly mixing with 79-116 parts of molten compound fertilizer, cooling, drying and granulating to obtain long-lasting compound fertilizer; uniformly mixing 4-6 parts of potassium feldspar, 5-8 parts of vermiculite, 5-10 parts of peat, 15-20 parts of maleic anhydride, 6-10 parts of phosphogypsum, 0.1-2 parts of EDTA, 12-15 parts of biochemical fulvic acid, 15-25 parts of potassium humate, 35-40 parts of livestock and poultry fermented organic fertilizer, 80-120 parts of the long-lasting compound fertilizer and 1-5 parts of a water-retaining agent to obtain the water-retaining slow-release fertilizer. The water-retaining slow-release fertilizer can effectively reduce the salinity and the alkality of saline-alkali soil, can improve the fertilizer utilization ratio, can reduce environment pollution caused by application of a large amount of chemical fertilizer, and has the advantages of long-lasting fertilizer efficiency and environment friendliness of raw materials.

The invention provides a spray seeding matrix and a preparation method thereof. In the spray seeding matrix provided by the invention, the soil, straw, adhesive and fertilizer are used as main raw materials which are doped with some of construction waste; and by adopting a combination of special dosage ratio, the obtained spray seeding matrix has high strength, the stability can be maintained for a long time, the fertilizer efficiency lasts long, the cost is low, and the greening effect can be effectively improved. By adding the spray seeding matrix into the construction waste, the slope stability can be effectively improved, the greening quality is increased, and the investment cost is lowered. The spray seeding matrix provided by the invention improves the problems such as relatively bad structure, relatively few granular structures and nutrient lack of the soil formed after the spray seeding of the traditional matrix and the problem of instability caused by adhesive failure. The indexes of the spray seeding matrix can reach the traditional matrix standard, wherein the early-stage growth condition of the plant, the plant biomass, the soil fertility, the erosion resistance and the like are all greatly improved. The preparation method of the spray seeding matrix provided by the invention is simple in technology, low in cost and suitable for large-scale production.

The invention provides a special slow / controlled release fertilizer for capsicum. The special slow / controlled release fertilizer for capsicum is characterized in that the special slow / controlled release fertilizer for capsicum comprises, by mass, 0.10-0.15% of N-(n-Butyl)thiophosphoric triamide or quinhydrone and 0.25-0.30% of dicyandiamide. A preparation method of the special slow / controlled release fertilizer for capsicum comprises the following steps: combining fertilizers of macro, medium and trace elements of N, P, K, Mg, B, Zn and the like with organic fertilizers comprising high-quality decomposed rapeseed meal, chicken manure and the like, adding a urease inhibitor and a nitration inhibitor, and mixing. The special slow / controlled release fertilizer for capsicum has a slow release effect in soil, is rich in all nutritional elements specially required by the growth of capsicum, can effectively satisfy the nutrient needs of the capsicum of different growth stages, and can effectively improve the capsicum output.

The invention discloses a method for treating and improving saline-alkali soil. The technical scheme essentials include the steps of uniformly mixing a soil conditioner and a soil improvement agent, uniformly scattering the mixture on the surface of the saline-alkali soil, plowing the saline-alkali soil after standing treatment, and then conducting irrigation to eliminate salt, wherein the soil conditioner includes furfural residue, peat, animal waste, traditional Chinese medicine residue, sodium alginate, fulvic acid, a biological bacterium agent and water; and the soil improvement agent includes phosphogypsum, calcium superphosphate, polyacrylamide, lauryl alcohol phosphoric acid ester potassium, potassium dihydrogen phosphate, meerschaum powder, diatomite, attapulgite, bamboo fibers, sodium lignosulfonate and water. According to the invention, the soil conditioner and the soil improvement agent are applied to the saline-alkali soil, so that the salinity and pH-value of the soil arereduced, the soil fertility is increased, the soil structure is improved, the salt return of the plough layer is alleviated, the emergence rate of crops is improved, and the treatment efficiency is improved.

The invention relates to a fertilizer, in particular to a selenium urea formaldehyde roller pelleting compound fertilizer and a production method thereof. After selenium urea formaldehyde is added into the compound fertilizer, agricultural products enriched in selenium cannot only be produced; because a nitrogen element and a selenium element in the selenium urea formaldehyde are chelated, the selenium urea formaldehyde roller pelleting compound fertilizer has a certain release function, and the fertilizer efficacy time is long so as to improve the yield of the crops. On the other hand, the compound fertilizer adopts circulation cooling in the production process and the cooling process, so that fertilizer particles are fully cooled, along with the adhesion of the selenium urea formaldehyde, so that the particle hardness of the compound fertilizer product is high, less water content is introduced into the production without drying, so as to greatly save energy sources.

The invention refers to a kind of soil, especially a biologic multi-element slow-release nutritious earth and the making and using mehtod. The main components as follows: soil containing organic matter and biologic activity 50-90%, corn powder 5-10%, rice bran 1-3%, wheat bran 0.5-3%, plant stalks 1-10%, animal dejecta 1-10%, seedcake dregs 0-0.5%, composite enzyme 0.04-0.08%, additive containing nitrogen, phosphor and kalium 0.015-0.08%; the making method; maka eup the nutritious earth in a certain proportion, stir, then place is into ferment pond, ferment for 15-60 days at 50-70 C degree, take out and add appropriate amount of high-molecular absorbing agent and then process to get the nutritious earth.

The invention discloses a saline-alkali soil improving agent and a preparation method thereof. The saline-alkali soil improving agent comprises the following components in parts by weight: 8 to 12 parts of desulfurized gypsum, 30 to 50 parts of biogas residue, 20 to 30 parts of sepiolite ore powder, 10 to 15 parts of oyster shell powder, 5 to 10 parts of phosphate, 3 to 8 parts of humic acid ore powder, 2 to 6 parts of expanded vermiculite powder, 1 to 5 parts of ferrous sulfate, 2 to 4 parts of modified plant straw powder, 0.5 to 1.5 parts of diatomite, 0.4 to 0.8 part of carboxymethyl chitosan, 0.3 to 0.7 part of rotten vinasse, 0.2 to 0.6 part of a microbial preparation and 3 to 7 parts of an organic fermented fertilizer. The saline-alkali soil improving agent can effectively improve the soil structure and reduce the alkalization degree of the soil so as to promote the growth of crops and increase production.

The invention discloses a method for feeding crayfishes by nano feeds. The method comprises the following steps: putting juvenile prawns into a paddy field with the characteristics of sufficient water source, convenience in irrigation and drainage, good water retention capability, non drought in dry weather, no flooding, good ecological environment, no pollution source, fertile soil and natural substrate, and then putting grass carp summer flowers, bighead carp summer flowers, snails and the like into the paddy field. By adding a compound microorganism fertilizer, the crayfishes can be promoted to grow quickly, the EPA (eicosapentaenoic acid) content can be increased, the diseases of the crayfishes are reduced, the fatality rate is reduced, beneficial microorganisms in a water body are added, and the final quality is improved.

The invention discloses an efficient compound fertilizer which is prepared from the following raw materials in parts by weight: 70-80 parts of sheep manure, 45-50 parts of waste residues of beer, 23-26 parts of pear saw dust, 30-34 parts of potatoes, 30-34 parts of urea, 20-23 parts of monopotassium phosphate, 12-17 parts of diammonium phosphate, 10-14 parts of potassium chloride, 10-12 parts of potassium sulfate, 1-2 parts of sodium sulfite, 4-6 parts of sodium humate, 4-6 parts of a coating agent, 3-4 parts of an EM bactericide, and a proper amount of water. The fertilizer disclosed by the invention is prepared from organic matters including the sheep manure, the waste residues of beer, the pear saw dust, the potatoes and the like which are added with nitrogen, phosphorus and potassium, micro-elements, mid-elements and a sustained-release material, so that the fertility of the soil is improved and the aim of slowly releasing fertilizer nutrients is achieved, the utilization rate of the fertilizer is increased as well, and the environmental pollution is reduced. The prepared fertilizer has the characteristics of water retention, fertilizer retention, long fertilizer action time and good air permeability; meanwhile, the soil can be improved, nutrient balance of the soil is guaranteed, and sustainable development of the agriculture is promoted.

The invention relates to a marine polysaccharide inorganic and organic composite controlled release fertilizer and a process for producing the same, belonging to the technical filed of fertilizer for corps. The marine polysaccharide inorganic and organic composite controlled release fertilizer comprises the following raw materials: 0.5-10wt% marine polysaccharide, 8-15wt% urea, 10-14wt% calcium superphosphate, 6-15wt% complex potassium salt and 30-65wt% seaweed meal, nitrogen-enriched bacterium and bacillus mucilaginosus are used as effective microbes, and others are common household organic fertilizers. The process comprises the following steps: (1) weighing the raw materials in certain mass percent; (2) homogenizing the raw materials for 10-20min; (3) granulating by disc atomizing; (4) drying the particles obtained by the step (3); (5) cooling the dried particles by normal temperature air cooling; (6) grading the cooled particles by a rotary screen; (7) coating the product surface with mixed water solution spray of marine polysaccharides and seaweed meals; and (8) measuring and packaging. The process has the advantage of scientific and reasonable process technique, and the produced fertilizer has the advantages of quick-acting, long-acting, synergy, water holding and controlled release. Various effects which can effect long time are achieved by fertilizing one time, so that the labor intensity of farmers is lightened, and the effectiveness and economy of fertilizing is improved.

The invention provides an organic fertilizer preparation method and multi-strain breeding of biodegradable coal gangue, which are two preparation technologies characterized by crushing of the coal gangue, mixed fermentation and degradation of the crushed coal gangue and multi-strain microorganism, activation of organic functional groups and minerals in the coal gangue, acquisition of humic acid in high content, crushing, drying, granulation, coating and obtainment of liquid organic fertilizer. The technologies according to the invention are simple and convenient, wide in raw material source and low in cost.

The invention discloses a fruit-tree fertilizer in a porous brick form, which is prepared by mixing 50-70% of organic fertilizer, 10-20% of nutrient element, 15-30% of binding material and 1-5% of plant material in percentage by weight to make a brick which is 15-30 cm long, 10-20 cm wide and 5-10 cm high, wherein the width surface of the brick is evenly distributed with 4-12 pores which perpendicularly penetrate through the brick, and the diameters of the pores are 2-5 cm. The fertilizer has the advantages of easy obtainment of raw materials, simple production technique, convenient operation, comprehensive nutrient content and long effective period; when in use, the porous nutrient brick can be entirely embedded into soil; the porous nutrient brick is suitable for requirements of fruit trees; and the nutrient content is slowly dissolved and released, and then can temporarily stay in the pores, therefore being not easy to run off.

The invention discloses a special organic cultivation substrate for epipremnum aureum and a preparation method therefor and belongs to the technical field of soilless culture. The special organic cultivation substrate for the epipremnum aureum is prepared from the following raw materials in parts by weight: 100-150 parts of organic well-composted matrix, 40-60 parts of wood sawdust, 40-60 parts of straws, 30-50 parts of bean cakes and 1-3 parts of N, P and K ternary compounded fertilizer. According to the organic cultivation substrate, no mineral raw material difficult to degrade is added, so that no influence on environment can be caused. The organic cultivation substrate is rich in source of raw materials and low in cost, and the difficult problems that oil sludge remaining during chondroitin sulfate extraction is hard to reutilize and a large number of pineapple peels cause pollution to the environment are solved; and meanwhile, the prepared substrate is good in moisture and fertility preserving capability and air permeability and complete in nutritional component and fully meets the needs of the epipremnum aureum on cultivation and growth, and the occurrence of plant diseases and insect pests can be greatly reduced or prevented.

The invention discloses a multiple-effect citrate-soluble silicon fertilizer, a preparation method of the silicon fertilizer, and an application of the citrate-soluble silicon fertilizer in farmland.The multiple-effect citrate-soluble silicon fertilizer contains various nutritive elements such as silicon, potassium and calcium and comprises the following raw materials: silicon-containing residueand an activator, wherein the activator comprises a mixture of potassium carbonate and calcium carbonate. The preparation method of the citrate-soluble silicon fertilizer comprises the steps of intensively mixing and milling the silicon-containing residue and the activator, performing high-temperature roasting treatment by using a rotary furnace, and performing milling at last to form the multiple-effect citrate-soluble silicon fertilizer. When the multiple-effect citrate-soluble silicon fertilizer is applied to farmland soil as a base fertilizer, the silicon fertilizer has better effects of improving soil fertility and promoting crop yield increase. The recycling of the silicon-containing residue is achieved; at the same time, the multi-effect citrate-soluble silicon fertilizer with longfertilizer efficiency and low possibility of loss is obtained; in addition, a preparation process is simple; a production period is short; large-scale production is easy to realize; and the silicon fertilizer can achieve better economic and social benefits.

The invention discloses a special fertilizer for ornamental flower plants, relates to a special fertilizer for flowers, and belongs to the technical field of biologic fertilizers. The fertilizer is characterized in that the fertilizer comprises 25-35wt% of Trichoderma spp., 15-20wt% of urea, 12-13wt% of ammonium biphosphate, 12-13wt% of potassium oxide, 6-13wt% of attapulgite powder, 10-15wt% of humic acid and 1-2wt% of amino acid chelated rare earth. The fertilizer has the characteristics of water retention, fertilizer retention, long fertilizing time and good ventilating performance, is benefit for the root growth and the absorption and utilization of phosphorus by plants, and can effectively prevent ammonia and potassium loss and prevent the fixation of soil plant active mineral components by phosphoric acid to make soil in a loosened ventilating state for a long time, so the growth of crops is promoted.

The invention discloses a multifunctional ecological soil conditioner. The soil conditioner comprises urea-formaldehyde foam containing organic matters, biochar, humic acid, wood vinegar, imidazole modified tapioca starch and azotobacter. The multifunctional ecological soil conditioner simultaneously has the multiple conditioning effects of stabilizing heavy metals, preserving moisture and fertility, realizing slow release and long-time action of nutrients, increasing the fertilizer utilization ratio, improving the soil structure and micro-ecological environment and the like, and can adapt to conditioning and restoration of various polluted soils.

The invention discloses a method for breeding finless eel by nano feeds. The method comprises the following steps: selecting a pond which is in east and west directions, has a length-to-width ratio of 3 to 2, an area of 2000-10000m<2>, a pond ridge height of 1.8-2.0m and a stable water level of 1.4-1.5m, and is provided with perfect water drainage facilities as a breeding pond; disinfecting the pond in 10-15 days before finless eel fries are put into the pond, draining off water in the pond, checking whether holes are formed, cleaning the pond by unslaked lime, and feeding the finless eel fries with multifunctional microorganism feeds. Through comparison, and by adding a compound microorganism fertilizer, the finless eel can be promoted to grow quickly, the EPA (eicosapentaenoic acid) content can be increased, the finless eel diseases are reduced, the fatality rate is reduced, meanwhile beneficial microorganisms in a water body are added, and the final quality is improved.

The invention discloses a spray-seeding medium for soil-rock mixed side slopes and a preparation method of the spray-seeding medium. The spray-seeding medium for the soil-rock mixed side slopes is mainly prepared from, by mass, 23-40% of clay, 50-75% of loamy soil and 0.6-12% of reed fibers, wherein the length of the reed fibers ranges from 20mm to 120mm. The spray-seeding medium for the soil-rockmixed side slopes are mainly prepared from the clay, the loamy soil and the reed fibers, which are compounded according to specific proportions; the structural stability, pulling force and adhesive force of the medium are enhanced through the reed fibers, and the degraded reed fibers serving as bio-organic fertilizer provide nutrients for plant growth; the problems caused after spray seeding of conventional media, such as poor structure, few granular structures and nutrient shortage of the soil, as well as the problem of unstability caused by efficacy loss of binders, are solved; resource utilization of reeds can be realized.

The invention discloses a cultivation method capable of reducing stichopus japonicus disease and pest injuries with corrosion inhibition nanometer materials. The method includes the following steps that a stichopus japonicus cultivation pool and an adhesion base are constructed; according to the requirement for habits of the stichopus japonicus biology, the pool suitable for growth of stichopus japonicus is built up by combining with real conditions and stichopus japonicus offspring seeds are put; normally, large seeds with the density of more than 600 per kilogram are put according to the density of 10 per m<2> to 20 per m<2>, the larger the specifications are, the less the put amount per unit area is; a formula of the cast feed comprises, by weight, 20-25 parts of animal proteolysis article dry powder, 15-20 parts of meat and bone meal, 20-22 parts of soybean meal, 4-6 parts of honeysuckle, 2-3 parts of medicated leaven, 3-5 parts of angelica sinensis, 2-3 parts of soya bean lecithin, 1-2 parts of alginate-derived oligosaccharide, 1-2 parts of vitamin C, 1-2 parts of spiral seaweed, 2-3 parts of hunmulus lupulus, 3-5 parts of tea saponin, 2-3 parts of common cnidium fruit, 3-4 parts of fructus ulmi and 1-2 parts of cortex pseudolaricis. The stichopus japonicus offspring seeds are managed. In winter, the depth of water in the pool is increased, changes of dissolved oxygen and a base material must be paid attention to and sea grass is prevented and controlled; in spring, when the temperature of the water in the pool goes up, firstly, the water goes rich, the transparency of the water is reduced and cultivation of the sea grass is controlled.

The invention discloses an organic microcapsule fertilizer containing Chinese toon. The organic microcapsule fertilizer is prepared by following steps: a fermentation microbial inoculum is added into agricultural waste; appropriate inorganic and organic inducers are selected according to the need of breeding enzymes of the fermentation microbial inoculum, and are weighed, adjusted, smashed, and homogenized according to a ratio; the fermentation microbial inoculum is induced by the inorganic and organic inducers so as to realize fermentation of agricultural waste; and after thorough decomposition, the mixture is adjusted so as to obtain the organic microcapsule fertilizer. Action time of fertilizer efficiency is prolonged more than three months, fertilizer utilization ratio is increased 15%, and benefits of producers are increased.

The invention provides a special slow-control / release fertilizer for eggplant, which is characterized in that it comprises 0.05%-0.08% of n-butylthiophosphate triamine, 0.05%-0.08% of hydroquinone, and 0.24%-0.28% of dicyandiamide, In mass percentage. The present invention combines nitrogen, phosphorus, potassium, calcium, magnesium, molybdenum, boron, zinc, iron and other large, medium and trace element fertilizers with organic fertilizers such as high-quality decomposed rapeseed meal, chicken manure and peat, and adds urease inhibitors, The nitrification inhibitor is mixed and prepared, which can have a slow-release effect in the soil. It is rich in various nutrient elements specially required for the growth of eggplant, can meet the nutrient needs of eggplant in different growth and development stages for a long time, and effectively increase the yield of eggplant.

The invention relates to a hyacinth plant based nano slow-release oil suspending agent and a preparation method thereof. The suspending agent provided by the invention can be used for soil treatment after planting before seedling, and has the characteristics of farmland weed eradication and broad-spectrum sterilization. Compared with the prior art, the formulation provided by the invention has the characteristics of favorable weed eradication effect, high safety for environment and the like, and the weed can not easily generate drug resistance, thereby having wide application prospects.

The invention discloses an efficient controlled release fertilizer favorably improving taste and freshness of ivy mosses. The fertilizer comprises the following components in parts by weight: oyster shells, polylactic acid, expanded graphite, thermally activated nano chernozem, pinecones, pomegranate barks, mosses, sugarcane ash, a soil beneficial microbial inoculant, bacitracin zinc, phytase, amino acid, ground calcium ammonium sulfate, boric acid, sodium selenite, chelated iron, potassium fulvate, lysine, a proper amount of hydrogen peroxide, a proper amount of ammonia water, a proper amount of water and the like. The coated controlled release fertilizer is prepared by using the pinecones, the pomegranate barks, the mosses and the sugarcane ash which are matched with nutritional substances through fermentation. The fertilizer is rich in nutrient elements such as fermented small molecular organic matters, calcium, iron, selenium and zinc, is abundant in nutrient and convenient for plants to absorb and utilize, so that the taste and freshness of the ivy mosses can be enhanced; by adopting the coating layer which can supply oxygen and dynamically adjust the porosity, the fertilizer efficiency time is long, organic matter nutrients can be released for a long time, efficient cultivation of the ivy mosses can be realized, and the fertilizer can be widely applied and popularized.

The invention relates to a controlled-release zinc fertilizer and a preparation method thereof. As for the controlled-release zinc fertilizer provided by the invention, the zinc sulfate heptahydrate, weathered coal, urea and bentonite are compounded and granulated to form a core zinc fertilizer; then the core zinc fertilizer is enveloped by the molten sulfur; finally, the zinc / sulfur-coated fertilizer is further enveloped by the modified epoxy resin material to obtain three kinds of two-layer enveloped zinc fertilizer with different envelope thicknesses; and moreover, the zinc fertilizer with different envelop thicknesses is subjected to secondary compounding so that the nutrient release time of the produced controlled-release zinc fertilizer in soil is long, the release speed is uniform, and the needs of the crops in one year can be met by once application.

The invention discloses microbalance ecological fertilizer special for yellow peaches. The microbalance ecological fertilizer is prepared from the following components in parts by weight: compost, humic acid, trace element amino acid chelate fertilizer, basic salt, polyglutamic acid, seaweed extract, calcium magnesium phosphate fertilizer, monoammonium phosphate, potassium sulfate, ammonium sulfate, silicon fertilizer and borax. The invention also provides a preparation method of the microbalance ecological fertilizer special for the yellow peaches. The microbalance ecological fertilizer disclosed by the invention has the advantages that according to the soil environment, by combining the growth habit and the environmental factors of yellow peach trees and controlling formula components and compositions proportions thereof, the purposes of increasing the utilization rate of the fertilizer, prolonging the fertilizer efficiency time, activating soil nutrients, adding beneficial microorganisms in soil, promoting nutrient absorption and the like of tree bodies, providing persistent and comprehensive nutrition supplies for growth of the yellow peach trees, increasing the quality of theyellow peaches, increasing the yield and increasing the income can be achieved.

The invention is suitable for the field of agricultural chemical fertilizers and provides a colorful slowly-releasing compound fertilizer and a preparation method thereof. The colorful slowly-releasing compound fertilizer includes a nitrogen-containing compound, a phosphorous-containing compound, a potassium-containing compound, a slowly-releasing agent, a microelement compound and a filling material. In the colorful slowly-releasing compound fertilizer, the slowly-releasing agent is used as an additive, so that the releasing rate of nutrients in the compound fertilizer can be slowed down, thereby prolonging a releasing time. The slowly-releasing compound fertilizer can reduce fertilizing times and fertilizing amount and can reduce planting cost. The phosphorous-potassium granular compound fertilizer is manufactured through an extrusion technology. The compound fertilizer is simple in production technology, is increased in yield rate, is less in labor consumption, is low in energy consumption and can protect environment.

The invention discloses multifunctional compound fertilizer for saline-alkali soil. The multifunctional compound fertilizer comprises, by weight, 20-40 parts of nitrohumic acid particles, 10-20 parts of citric acid residues, 5-10 parts of modifier, 15-25 parts of duckweed residues, 5-15 parts of magnetic biochar, 5-15 parts of super-absorbent resin, 10-30 parts of nitrogen-phosphorus-potassium compound fertilizer and 2-6 parts of binder. The invention further discloses a preparation method of the multifunctional compound fertilizer. The multifunctional compound fertilizer has the advantages that the components of the multifunctional compound fertilizer are combined, and the multifunctional compound fertilizer is low in cost, scientific and reasonable in proportion, sufficient in nutrition, high in utilization rate, evident in yield increasing effect, balanced in nutrition of each particle, capable of evidently improving the soil, increasing the granular structure in the soil, lowering the pH of the soil and fundamentally improving the physical and chemical properties of the saline-alkali soil, especially suitable for the growth of crops in the saline-alkali soil and capable of providing a guarantee to the yield increasing and the income creating of farmers. The preparation method of the multifunctional compound fertilizer is simple, practicable and suitable for large-scale popularization and application.