862results about How to "High nutrient content" patented 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 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 compound liquid fertilizer with high suspension degree, and a preparation method and an application thereof, and belongs to the liquid fertilizer industry field. The preparation method comprises the steps: adding macromolecule organic sugar into a clay material to be used as a basal suspending agent I, and carrying out first suspension chelation of a major element and a trace element at the temperature of 40-60 DEG C; followed by controlling the temperature at 20-30 DEG C, slowly adding a plant growth regulator and a surface active material, fully mixing uniformly, finally adding macromolecule cellulose and an analog thereof as a suspending agent II, carrying out second suspension chelation, and fully stirring to obtain the compound liquid fertilizer with high suspension degree. The prepared compound liquid fertilizer with high suspension degree has comprehensive nutrients, high content, low cost, good liquidity, good stability and good dissolvability, and is beneficial for crops to efficiently absorb and utilize. The preparation method is simple in process and easy to implement. The compound liquid fertilizer is an ideal fertilizer source for water and fertilizer integration for drip irrigation, sprinkler irrigation, water flushing and the like.

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 relates to an industrial production method and device of a urea-formaldehyde slow-release compound fertilizer and a device thereof. The industrial production method comprises the steps of adding water and oxidized starch to a reaction still and then pasting, adding urea of which the nitrogen content is 46wt% and formalin, stirring, dissolving and then adjusting the pH value to 8.5-8.8 by an alkaline matter, reacting at constant temperature of 60 DEG C to obtain reaction liquid; adjusting the pH value to 5.4-5.1 by the reaction liquid; reacting for 45 minutes at the constant temperature of 65-68 DEG C, then adjusting the pH value to 6.8-7.2, and terminating reaction to obtain the urea formaldehyde condensation product solution; mixing the urea formaldehyde condensation product solution with nitrogen, phosphorus and potassium materials, pelletizing, drying and cooling to below 35 DEG C, and screening to obtain the urea-formaldehyde slow-release compound fertilizer. The industrial production device of the urea-formaldehyde slow-release compound fertilizer is also provided by the invention. Urea formaldehyde is taken as a skeleton; rapid disintegration phenomenon of fertilizer particles caused by water absorption expansion is effectively prevented; the urea-formaldehyde slow-release compound fertilizer has good nutrient slow-release performance, and is high in pelletizing rate in the production process and strong in granule hardness, and the total nutrient content is improved.

The invention relates to a water-soluble high-concentration organic-inorganic compound fertilizer for trickle and sprinkling irrigation and a preparation method thereof, belongs to the technical field of integration of water and fertilizer and high concentration organic-inorganic compound fertilizers. The fertilizer comprises the following components in percentage by weight: 35-70% of urea or 40-70% of modified nitramine, 5-40% of water-soluble phosphatic fertilizer, 0-35% of water-soluble potassic fertilizer, 20-40% of water-soluble organic matters, 0.05-0.1% of a water-soluble fertilizer synergist, 0.1-10% of water-soluble chelating medium trace elements and 0.1-10% of a plant growth adjustor. Nitrogen, phosphorus and potassium account for 30-50% of the prepared water-soluble high-concentration organic-inorganic compound fertilizer for trickle and sprinkling irrigation and the organic matters account for 15-25% of the prepared water-soluble high-concentration organic-inorganic compound fertilizer for trickle and sprinkling irrigation. The water-soluble high-concentration organic-inorganic compound fertilizer is good in solubility, can be matched with trickle and sprinkling irrigation equipment and achieves integration of water and fertilizer; the utilization ratios of nitrogen, phosphorus and potassium and trace elements are high, and the fertilizer has the advantages of improving the soil environment, adjusting crop growth, enhancing stress resistance of the crop, and improving the quality of crops.

A fertilizer supplying animal nutrients including a core particle having an outer surface and comprising compounds containing animal nutrients, and a coating of urea on the outer surface of the core particle, and further a process of making the fertilizer including the steps of: screening animal nutrient core particles comprising a powdered substance containing an animal nutrient, to a preselected particle size; spraying melted urea onto the surface of the nutrient core particles to produce a coating on the nutrient core particles; granulating the nutrient core particles with sprayed melted urea to produce nutrient core granules; and cooling the nutrient core granules.

The invention relates to a deodorant nitrogen-conserving conditioner. The using method comprises the following steps: evenly mixing pig manure and crushed straw or other crop straw in a ratio of 2-8:1, wherein the moisture content is between 60 and 65 percent; carrying out simple high-temperature composting by adding 25 to 40kg deodorant nitrogen-conserving conditioner in each 1,000kg compost rawmaterial; and adopting a pile-turning or a forced ventilation mode, wherein the temperature is not more than 70 DEG C during high-temperature composting. The deodorant nitrogen-conserving conditionercomprises 15 to 20kg calcium chloride, 10 to 15kg calcium superphosphate and 3 to 8kg zeolite. The compost becomes thoroughly decomposed after 30-day composting. The deodorant nitrogen-conserving conditioner is characterized in that: the conditioner can reduce odorous substances in the pig manure compost and ammonia volatilization and eliminates odour more than 10 days earlier; moreover, the conditioner increases the content of nitrogen nutrients in a compost product by over 20 percent and reduces nitrogen loss by over 70 percent in the composting process; and at the same time, the conditioner has the advantage of simple and easy operation and is suitable to be used in organic fertilizer factories and vast rural areas.

The invention relates to organic carbon suspension liquid compound fertilizer and a preparation method of the organic carbon suspension liquid compound fertilizer. The organic carbon suspension liquid compound fertilizer comprises, by weight, 18.1-26.5 parts of organic carbon, 0.4-7.2 parts of nutrient substances, 10-12.5 parts of suspending agents and 25.0-33.0 parts of water. The organic carbon suspension liquid compound fertilizer can resolve the unbalanced fertilizer application state of carbon hunger of crops, is complete in nutrient, promotes better growth of the root systems of crops, improves the yield and quality of crops, effectively prevents the carbon hunger symptom of crops, and improves the adverse resistance of crops such as cold resistance, drought resistance and disease resistance.

The invention discloses an organic / inorganic slow-release fertilizer for flowers and a preparation method of the slow-release fertilizer. The organic / inorganic slow-release fertilizer is prepared from the following raw materials in parts by weight: 45 to 55 parts of horse manure, 20 to 30 parts of wheat bran, 15 to 25 parts of brewer's grains, 12 to 18 parts of flour beetle frass sand, 10 to 15 parts of residual tea, 5 to 10 parts of edible fungi waste, 18 to 26 parts of sorgo straw, 10 to 15 parts of mung bean shells, 5 to 10 parts of sugar beet meal, 1 to 3 parts of spawn powder, 16 to 22 parts of yellow phosphorus furnace slag, 20 to 30 parts of obsidian, 17 to 24 parts of hectorite, 10 to 15 of parts zeolite 4A, 32 to 44 parts of ammonium nitrate, 22 to 28 parts of ammonium hydrogen phosphate ammonium dihydrogen phosphate, 8 to 14 parts of potassium carbonate, 2 to 3 parts of diaminoferric xanthohumate, 3 to 6 parts of sugar calcium, 4 to 8 parts of sodium metasilicate, 15 to 20 parts of polyvinyl alcohol, 5 to 10 parts of carboxymethyl cellulose, 9 to 16 parts of hydroxypropyl xanthan gum, 2 to 4 parts of algal polysaccharides, and 3 to 5 parts of polyglutamic acid. The fertilizer provided by the invention is high in nutrient amount and high and long in fertilizer efficiency, can improve soil, enables soil to form granular structures, and harmonizes water and gas in soil to enable flowers to grow up well and quickly, thereby improving the quality and the yield of flowers and lowering the fertilization cost; important economic benefits are brought.

The invention belongs to the fertilizer field and particularly relates to microbial water-soluble fertilizer and a preparation method thereof. The microbial water-soluble fertilizer comprises a live microbial agent, potassium fulvic acid, amino acid, sucrose, cyclodextrin, humic acid, nutrient fertilizer, microelements, sodium lignin sulfonate and a surfactant. According to the microbial water-soluble fertilizer, the microbial agent is coated with cyclodextrin, then the is mixed with humic acid, the nutrient fertilizer and chelate microelements, and the problems that microbial fertilizer cannot be mixed with traditional fertilizer easily, is difficult to apply and the like are solved. The microbial water-soluble fertilizer is rich in nutrition and high in nutrient content, the added aminoacid, sucrose and microelements can increase the survival rate of beneficial active bacteria, the efficiency of the fertilizer is comprehensively played, the yield and quality of crops are improved, and the fertilizer can improve the soil environment and enhance the immunity of the crops after being used for a long time.

The invention discloses a tower-smelt organic-inorganic compound fertilizer and a preparation method thereof. The invention relates to the agriculture technical field, and specifically relates to an organic-inorganic compound fertilizer and a preparation method thereof. The method comprises the following steps: A, mixing carbamide solution or ammonium nitrate solution with potash fertilizer to obtain the mixture; and B, mixing and chelating potassium fulvate or ammonium humate with the mixture. In the organic-inorganic compound fertilizer prepared by the method, the weight percentage of the total content of nitrogen, phosphorus and potassium is more than or equal to 20%, the weight percentage of the content of the potassium fulvate or the humate is more than or equal to 8%, and the weightpercentage of the content of moisture is less than or equal to 2.0%. The organic-inorganic compound fertilizer has quick action of the chemical fertilizer, and also has the long residual action, soilimprovement effect and multifunctional environmental protection of the organic fertilizer, achieving the multiple effects of developing agriculture, improving soil and the like.

The invention relates to the technical fields of agricultural science and environmental science, and discloses a method for producing a bio-organic fertilizer by utilizing livestock and poultry feces, which is characterized by comprising the following steps of: crushing stalks and coal ash and sieving by using a sieve of 15 to 40 meshes; uniformly mixing the livestock and poultry feces, stalk powder, coal ash, humid acid and a composite solid strain according to a ratio of (350-400): (15-18): (25-28): (40-45): (1-2) by using a premixer; putting into a special fermentation tank, fermenting at normal temperature for 20 to 30 days, controlling the temperature in the fermentation tank in the fermentation process to be 55-75DEG C, and simultaneously performing proper stirring and full aeration; taking the fermented materials out, drying, sieving, and granulating into powder. The livestock and poultry feces are taken as main raw materials, so the method is simple in process, easy to operate and low in product cost, and has obvious economic and social benefits.

The invention relates to a technical field of water-soluble fertilizer production, and specifically relates to a production method of a water-soluble microbe multi-element solid fertilizer. The production method is characterized in that the water-soluble microbe multi-element solid fertilizer is produced from well mixed main components of, by weight: 10-50 parts of a component A, 1-60 parts of a component B, 5-30 parts of a component C, 1-50 parts of a component D, 0.1-10 parts of a component E, 10-40 parts of a component F, and 0.1-10 parts of a component G. The component A is water-soluble humic acid, the component B is a nitrogen fertilizer, the component C is a water-soluble phosphate fertilizer, the component D is a water-soluble potassium fertilizer, the component E is a solid microbial agent, the components F is amino acid, and the component G is trace elements. The fertilizer is economical and practical. The method is advantaged in simple operation. With the method, the water-soluble microbe multi-element solid fertilizer with high-quality, good water solubility, and high utilization rate can be produced. The fertilizer can be applied with water in crop drip-irrigation.

The invention belongs to the technical field of animal manure treatment and fertilizer production, and specifically relates to a special organic-inorganic compound fertilizer of producing cherries and tomatoes which uses pig manure compost and effective elements as raw materials. The weight percentages of the effective elements in the fertilizer by pure nutrients are: organic substances: 22.0; nitrogen: 15.0; phosphorus pentoxide: 5.0; potassium oxide: 10.0; calcium: 2.0; magnesium: 0.5; zinc: 0.5. The special organic-inorganic compound fertilizer of producing cherries and tomatoes which uses pig manure compost and effective elements as raw materials also discloses the production method of the organic-inorganic compound fertilizer. Compared with the prior art, the fertilizer of the invention fully uses the pig manure raw material, thus reducing pollutions of pig farms and protecting environment; meanwhile, the fertilizer of the invention provides the special organic-inorganic compound fertilizer of cherries and tomatoes which is cheap in price and complete in fertilizer efficiency.

The invention discloses a nutrient slowly-released type substrate block for vegetable seedling. The substrate block comprises the following components: peat, vermiculite, pearlite, spent mushroom composts, chopped straws, coated controlled-release urea and coated controlled-release compound fertilizers. The substrate block is prepared by such natural materials as peat, vermiculite and pearlite, and agricultural organic wastes and polymer-coated controlled-release fertilizers. The substrate block is especially suitable for seedling of the vegetables planted with seeds. The main nutrients in the substrate are provided by the polymer-coated controlled-release fertilizers and the content of the nutrients is improved by more than 10 times over the common seedling substrates; meanwhile, the substrate can be matched with the controlled-release fertilizers with different release speeds according to the needs of the cultivated plants so as to ensure the release speed of the nutrients in the substrate to meet the nutrient needs of different cultivated plants. Being used for crop seedling, the substrate block can realize that additional fertilizers are not needed in the seedling stage and even the early growth stage.

The invention relates to a minimum-tillage and no-tillage mulching cultivation method of a lemon orchard. The minimum-tillage and no-tillage mulching cultivation method comprises the following steps of: planting lemons in the flat land lemon orchard according to the requirement of enabling the distance between plants * the distance between rows to be 2.0-2.5m * 3.5-4.0m; planting pasture among lemon rows, planting 1 row of the lemons on each platform ladder surface of the sloping land lemon orchard and planting the pasture on platform sloping surfaces; timely cutting the pasture in growing seasons for mulching around tree trunks of the lemons, applying a basal fertilizer for the lemons once annularly, and performing drop irrigation fertilization or fertilization by a fertilization gun in other periods except the application of the basal fertilizer. According to the minimum-tillage and no-tillage mulching cultivation method, the frequency of tillage in the lemon orchard can be reduced, the using frequency and the quantity of the fertilizer and pesticide can be reduced, the production of the 4-year-old lemon orchard can be increased by above 120kg / mu, the yield of fresh forage of the 1-5-year-old lemon orchard can be up to 3850-2930 kg / mu, organic matters, available nitrogen, available phosphorus and available potassium in soil are increased, and the orchard can be developed in a sustainable and healthy manner.

The invention provides a high-phosphorus high-potassium liquid compound fertilizer. The liquid compound fertilizer comprises the following components: 20-120 parts of a phosphorus fertilizer, 15-60 parts of a potassium fertilizer, 0.1-12 parts of a microelement fertilizer, 0.5-5 parts of a co-solvent and 10-50 parts of water, wherein the microelement fertilizer is one or more of a boron fertilizer, a manganese fertilizer, a zinc fertilizer and an iron fertilizer and is a water-soluble fertilizer. The invention also provides a preparation method and an application method of the high-phosphorus high-potassium liquid compound fertilizer. The contents of phosphorus and potassium in the high-phosphorus high-potassium liquid compound fertilizer are higher, the phosphate radicals and potassium ions stably coexist in a liquid phase so that the generation of insoluble precipitates such as potassium phosphate is avoided, the high-phosphorus high-potassium liquid compound fertilizer has the advantages of high content of the total nutrient, stable physical and chemical shapes, no phenomena such as crystallization, precipitation and layering under high temperature, low temperature and room temperature conditions, good fluidity, high-concentration nutrients, time conservation, labor conservation, fertilizer conservation, high fertilizer efficiency and the like, the high-phosphorus high-potassium liquid compound fertilizer is suitable for larger-area automatic fertilizer-applying operation and the fertilizer-applying efficiency can be significantly increased.

The invention relates to a chemical improvement conditioner suitable for a coastal beach and a strongly saline-alkaline land and an application method thereof. The chemical improvement conditioner comprises the following components in parts by weight: 50-70 parts of ardealite, 20-30 parts of humic acid, 5-10 parts of aluminum sulfate and 3-5 parts of potassium dihydrogen phosphate. The chemical improvement conditioner disclosed by the invention has the advantages of simple improver component and preparation process, clarity in principle, low cost and quick effect. The application method of the chemical improvement conditioner aiming at different planting modes and soil salinity conditions provides an optimized application mode of 'less use for dry farming, more use for water farming, less use for a dry season, more use for a rainy season, more use for double salt and less use for light salt' by comprehensively considering the plant modes, soil salt contents and the rainfall difference of different seasons, thereby improving the desalting and alkali-improving efficiency, farthest decreasing the residues of an improver in soil and realizing multiple purposes of salt leaching, soil improvement and fertility improvement of the coastal beach and the saline-alkaline land.

The invention discloses a specific seedling substrate for Chinese cabbage, cabbage vegetables, and belongs to the technical field of soilless culture. The substrate comprises the following components in percentage by volume: 20 to 25 percent of vinegar residues, 10 to 15 percent of manioc waste, 10 to 15 percent of plant ash, 20 to 25 percent of vermiculite, 20 to 25 percent of turf, a little inorganic fertilizer, wherein 0.4 to 0.5kg of ammonium sulfate-nitrate, 0.1 to 0.2kg of potassium chloride, 0.1 to 0.2kg of monoammonium phosphate are added into the substrate. According to the seedling substrate, the vinegar residues, the manioc waste and other organic wastes are mainly used as raw materials and fermented at high temperature to produce soilless culture substrate, so that waste materials are changed into valuable things, and harmful substances are changed into benefits things. The seedling substrate produced by the invention has the advantages of high nutrition content, loosing and breathability, water and fertilizer maintenance and the like, and can be widely applied to seedling of Chinese cabbage, cauliflower, cabbage, broccoli and other cabbage vegetables.

The invention discloses a rapid construction method of a macadamia nut early-fruiting and high-yield garden in a karst rocky desertification mountain area and belongs to the technical field of fruit tree cultivation. The method comprises the following steps: selecting a land and carrying out soil preparation, selecting germchit, carrying out field planting on nursery stocks, carrying out tending management and shaping tree bodies. Specifically, the method comprises: selecting rock pits with the altitude of being lower than 1000m and a soil layer of being 50cm or more, and digging field planting holes; carrying out the soil preparation; selecting non-woven fabric nutrient bags grafted big seedlings as the germchit; carrying out the field planting on 3 to 5 macadamia nut varieties with relatively consistent florescence and fruit maturation period by adopting a mixed planting manner; combining water and fertilizer management and the like; topping when shoots of young plants grow to certain length every time, so as to promote the young plants to branch and culture early-fruiting and high-yield tree crowns. By adopting the method provided by the invention, the macadamia nut early-fruiting and high-yield garden is constructed in the karst rocky desertification mountain area; the garden enters an economic gain period one year ahead of a conventional grafted seedling garden; the investment period is shortened and the investment cost of constructing the garden is reduced; the recovery of vegetation covers of the karst rocky desertification mountain area can be facilitated, water and soil loss is prevented, people are led to a fortune and rocky desertification is managed.

The invention discloses special bio-organic fertilizer for organic tea and a preparation method of the special bio-organic fertilizer, and solves the problem of lack of appropriate and special fertilizer for organic tea planting in Guizhou province. The special bio-organic fertilizer for organic tea comprises the following components in percentage by weight: 25-35 percent of distiller grains, 15-25 percent of Chinese herb residue, 30-40 percent of chicken manure, 4-6 percent of mineral substance powder, 0.01-0.03 percent of a microbial agent I, 10-20 percent of a conditioner and 0.1-5 percent of a microbial agent II. The invention further provides the preparation method of the special bio-organic fertilizer for organic tea. According to the invention, abundant organic waste resources of Guizhou province are utilized, various nutrients are provided for the growth of organic tea, the improvement on the soil structure and the fertilizer utilization rate is facilitated, and the yield and the quality can be increased remarkably; and meanwhile, the cyclic utilization of organic waste is realized, the fertilizer preparation cost is low, and favorable economic benefits and ecological environment benefits are achieved.

The invention relates to an organic fertilizer and a production method of the organic fertilizer, in particular to a method for utilizing chicken manure to produce the organic fertilizer. The method comprises the following steps: uniformly mixing padding, broiler chicken excrement, breeding hen and / or laying hen excrement and zeolite to obtain a mixture; inoculating a microbial agent which is used for sufficiently curing the manure to the mixture, carrying out aerobic fermentation under the intermittent turning condition, wherein the microbial agent at least comprises aspergillus oryzae, high temperature resistant bacillus subtilis and saccharomycetes; piling and ageing the material after aerobic fermentation. The method aims at the characteristics of excrement of laying hen and breeding chicken, and flatly raised broiler chicken excrement, mixes the two kinds of chicken manure with different properties to meet requirements of the fermented material to carbon nitrogen ratio and moisture, and reduces the production cost. The chicken manure which possibly pollutes the environment can be converted to the organic fertilizer with large processing amount, so that the pollution problem of the chicken manure is solved. The produced organic fertilizer can be widely applied to organic crop planting, obviously improve the quality of agricultural products, and effectively improve the soil structure.

The invention relates to a method for producing an organic fertilizer by bamboo residues. The method comprises the following steps of: drying and grinding bamboo residues of bamboo leaves, bamboo roots, bamboo stems, bamboo shoots and the like, which are generated during bamboo processing; mixing the bamboo residues and excrement o animals in a ratio; and performing processes of fermentation, drying, granulation and the like of the mixture to obtain the organic fertilizer. The method has the advantages of improving contents of nutrients of silicon, calcium, magnesium, iron and the like in the organic fertilizer, improving the abilities of absorbing and retaining water of the organic fertilizer, enhancing the abilities of improving acid soil and plastic greenhouse soil, effectively adsorbing odor gas, ammonia gas and the like, which are generated during the production of the organic fertilizer, by utilizing the structural characteristics of bamboos, reducing the negative effects caused by the organic fertilizer, reducing loss of nutrients during the fermentation of the organic fertilizer, and improving the comprehensive benefits of the production of the organic fertilizer.

The invention discloses a sustained release binder and a preparation method thereof. The sustained release binder is obtained by stirring reaction of urea, 37 percent of formaldehyde and oxidized starch at the temperature of 75 DEG C to 80 DEG C, wherein, the molar ratio of the urea and the formaldehyde is 1.2-1.6:1, and the amount of the oxidized starch is 8 to 10 percent of weight of the urea. The sustained release binder of the invention can solve the problems that common compound fertilizer nutrient releases too fast, the hardness and appearance of the product are not ideal, etc. The sustained release compound fertilizer made from the sustained release binder improves the nutrient content of sustained / controlled releases (mixed) fertilizer. In addition, the processing of the invention has the advantages of high granulation rate, high hardness of fertilizer and good granular appearance.

The invention discloses an immobilized Bacillus having phosphate dissolving and heavy metal passivation functions and a preparation method and an application thereof, which belong to the technical field of cadmium pollution soil biological restoration. The immobilized Bacillus comprises biological carbon and Bacillus cereus B19, can be used for restoring the soil with severe cadmium pollution, and has better restoration effect. The composite microbe fertilizer contains the immobilized Bacillus, an organic fertilizer and an inorganic nutrient having the phosphate dissolving and heavy metal passivation functions. The composite microbe fertilizer has the advantages that cost is low, soil available nutrient content is increased, yield increase is achieved, the soil with cadmium pollution is effectively repaired, introduction of heavy metal cadmium in human body with crops can be effectively controlled, agricultural product safety is guaranteed; in addition, the composite microbe fertilizer cannot change a farmland utilization mode without secondary pollution, is conveniently used, and is economic and feasible.

The invention discloses a humic acid coating controlled release fertilizer which is prepared by wrapping solid film material on the surface of fertilizer grains by using a cementing agent and a firming agent. The fertilizer is prepared according to the following steps: firstly, polyurethane resin and the firming agents such as tung oil, bean oil and linseed oil are added to the fertilizer grains which are preheated in coating equipment; secondly, humic acid solid film material is scattered to the moving fertilizer grains, heating is carried out to hold the temperature, after solidification, a shock proof and abrasion resistant coating layer is formed, thus finishing once coating; thirdly, the first step and the second step are repeated for a plurality of times in sequence, thereby preparing the humic acid coating controlled release fertilizer needed. The controlled release fertilizer has high nutrient content and the coating layer has strong shock proof and abrasion resistance property. The fertilizer can improve the chemical and physical characteristics of low productive soil; humic acid can activate nutrient, increase the content of the organic matter, quick-acting nitrogen and quick-acting phosphorus in soil and improve the proportion of solid, liquid and gas in soil.

The invention discloses a paste type water-soluble fertilizer with potassium fulvic acid serving as a matrix. The paste type water-soluble fertilizer comprises the following components in parts by weight: 80 to 100 parts of potassium fulvic acid, 200 to 650 parts of potassium nitrate, 100 to 460 parts of monoammonium phosphate, 60 to 90 parts of urea, 130 to 160 parts of water, 2.1 to 3.8 parts of calcium magnesium phosphate fertilizer, 1.6 to 2.4 parts of manganese sulfate, 0.7 to 1.2 parts of ferrous sulfate, 0.8 to 1.3 parts of zinc sulfate, 0.8 to 1.4 parts of copper sulfate, and 0.6 to 1.2 parts of ammonium molybdate. A paste type water-soluble material with potassium fulvic acid serving as the matrix can bring the colloid effect, complexing effect, acid-base equilibrium effect for all components, and interspersion effect for all material of the potassium fulvic acid into full play in the whole compound fertilizer, so that the dissolution velocity of all the materials during being diluted with water can be increased, and the content of each nutritional ingredient in the fertilizer is increased; and the paste type water-soluble fertilizer has the characteristics of being free of precipitating, hardening, crystallizing and bleeding, and can be applied to foliage spray, fertigation, etc.

The invention provides a method for composting and returning crop straws to a field. The method comprises the following steps: digging a pit in suitable size at a corner of the field; stacking the straws in the pit in a layering way and treading down the straws; spreading a right amount of straw ageing agents and urea in each layer; after finishing stacking the straws, uniformly covering the top of the stack with the soil dug from the pit; after composting for several months, digging out the rotten straws from the pit and returning the straws to the field after harvesting crops in next season; and uniformly spreading the rotten straws in the field and using the rotten straws as base fertilizers, wherein organic matters got after the straws are rotten become clean green fertilizers. Under the condition of using the fertilizers, the hardened land becomes soft and loose, the fertilizer cost of peasants for farming is saved, and the environmental pollution problem caused by burning the straws is relieved.