92results about How to "Ease acidification" patented technology

The invention belongs to the technical field of in-situ repair of heavy metal contaminated soil. Municipal sludge is used for preparing sludge-based charcoal through thermophilic thermolysis. The charcoal can be used as a repairing agent for the heavy metal contaminated soil. The sludge charcoal repairing agent comprises thickened sludge and palygorskite. A final black product namely the sludge-based charcoal is produced through the steps of performing biological and physical anhydration on sludge, then mixing the sludge after the biological and physical anhydration with the palygorskite, performing feeding into an atmosphere furnace, and then performing thermophilic thermolysis. The sludge charcoal is produced from the following components of 5-10% of the palygorskite and the balance of thethickened sludge. According to the sludge charcoal disclosed by the invention, the municipal sludge is subjected to decrement and harmless treatment, so that the municipal sludge can enter cycle of material and energy in natural environment again, and the difficult problem of treating and disposing the sludge is solved. The sludge charcoal is added to the heavy metal contaminated soil, so that heavy metal contaminated substances can be effectively solidified, the purposes of being durable and stable in repairing effect and being free from secondary pollution are realized, and the sludge charcoal is an ideal soil heavy metal contamination repairing agent with low cost.

The invention discloses a composite soil remediation agent made from compost and a preparation method. Vigorous implementation of soil remediation is a primary task for protecting soil ecological environments and solving land resource scarcity. The composite soil remediation agent made from the compost comprises, by weight, 60-70 parts of compost materials, 10-15 parts of straw biomass charcoal, 20 parts of coal ash, 2-5 parts of zeolite powder, 3-5 parts of calcium magnesium phosphate fertilizer, 0.5-2 parts of composite microbial agents and 0.5-1 part of binder. The composite soil remediation agent and the preparation method have the advantages that the substances are combined organically, formula and production process are optimized reasonably, the composite soil remediation agent with functions of fertilizing, purifying and remediating the soil and promoting crop growth and development is provided for soil remediation, and accordingly, healthy, green and sustainable agriculture is promoted. The composite soil remediation agent is applied to soil remediation as well as biofertilizer and waste resource utilization.

The invention relates to a method of using biogas slurry to treat continuous cropping obstacles of greenhouse soil, which includes: ridging greenhouse soil, preparing biogas slurry, mulching for flooding, retaining a greenhouse closed at high temperature, and turning the soil; mulching after ridging; using fresh biogas slurry to directly flood under the mulch of ridges; sun-drying for 2-4 days after biogas slurry flooding, recovering with the greenhouse plastic mulch, and retaining the closed greenhouse under natural conditions; and removing the mulch on the ridges after the closed greenhouseis retained under natural conditions, and applying base fertilizer and turning the soil when soil water content reaches 15-25%. By the method, soil continuous cropping obstacle factors can be eliminated, part of nutrients can be supplemented, multiple effects on overcoming continuous cropping obstacles of greenhouse soil, enhancing soil fertility, relieving soil acidification, promoting operational normality of biogas engineering and the like are achieved, and the method is highly operable and convenient in popularization and application.

The invention relates to a method for efficiently producing marsh gas by performing moderate-temperature anaerobic dry fermentation on agricultural waste, which comprises the following steps: uniformly mixing livestock / poultry manure, crop straw and vegetable waste to obtain a mixture, adding an inoculum into the mixture, and carrying out moderate-temperature anaerobic dry fermentation to obtain the marsh gas, wherein the dry matter mass ratio of the sum of the livestock / poultry manure and vegetable waste to the crop straw is (0.3-0.4):1, and the dry matter mass ratio of the livestock / poultry manure to the vegetable waste is (0.1-0.3):(0.1-0.2). The method solves the problems of long fermentation time, low gas production rate, high acidification tendency and the like in the independent anaerobic fermentation of the material, greatly enhances the buffer property of the system, reduces the inhibiting effect due to overhigh concentration of the ammonia nitrogen or other inhibitors, widens the selection range of the fermentation raw materials, increases the treatment power on the organic solid waste, reduces the discharge of the agricultural waste, saves the resources and protects the environment.

The invention primarily relates to a multifunctional slow release organic fertilizer containing a heavy metal passivator and a preparation method. The fertilizer comprises the main components: thoroughly decomposed compost, a chemical nitrogen fertilizer, a biochemical inhibitor, a soil heavy metal passivating material, plant growth beneficial elements, a water retaining material and a coating liquid for coating the periphery of the organic particles. The proportion of the thoroughly decomposed compost, the chemical nitrogen fertilizer, the biochemical inhibitor, the soil heavy metal passivating material, the plant growth beneficial elements, the water retaining material and the coating liquid is 1: (0.1-0.3):(0.05-0.1):(0.01-0.2):(0.001-0.02):(0.04-0.08):(0.05-0.1). The fertilizer can reduce bio-availability of heavy metals in the heavy metal polluted soil and reduce adsorption of the heavy metals by crops and increase the content of organic matters in soil and improve the soil fertility, can promote crop growth and enhance water and fertilizer-retaining abilities of the soil, and enhance various functions of crops, for example, disease resistance, drought resistance and the like.

A reinforcing and repairing method for splitting and clamping paper document comprises the following steps: 1, manual pulp repairing is performed to paper to be repaired, and after dried, the paper is repaired in step 2; 2, firstly, a splitting and clamping material is adhered to the two sides of split paper obtained in step 1 with adhesive, secondly, the paper is split from the middle under the condition that the paper to be repaired is wet, thirdly, a layer of tissue paper is clamped between the two layers of paper and is glued with adhesive to ensure that the two sides of the split paper distributed in the upper and the lower layers stay at the original positions, and the paper is fixed and restored into the original shape after being dried, and finally, the splitting and clamping material is removed, and after the paper is dried and flattened, repairing of a single page is finished; 3, finally, all paper that is repaired through splitting and clamping is rebound, so that the repairing mission is finished.

The invention belongs to the field of soil fertilizer, and discloses a powder organic-inorganic water-soluble fertilizer and a preparing method thereof. The powder organic-inorganic water-soluble fertilizer comprises water-soluble organic matter, microelement water-soluble fertilizer, medium element water-soluble fertilizer, and a water-soluble anti-blocking agent. The content of nitrogen, phosphorous and potassium is larger than or equal to 30%, the content of calcium and magnesium is larger than 1%, and the content of organic matter is larger than 10%. According to the powder organic-inorganic water-soluble fertilizer and the preparing method thereof, the preparing technology is simple, the condition is mild, heating and fermenting are not needed, particles do not need to be prepared into, the four materials are directly uniformly mixed to prepare the powder organic-inorganic water-soluble fertilizer, the powder organic-inorganic water-soluble fertilizer can promote the absorption and utilization of crop to nitrogen, potassium, calcium and magnesium, soil beneficial microorganism reproduction is promoted, soil acidization and salinization are relieved, the crop root system growth is promoted, the utilization efficiency of crops to the water and nutrients is improved, the capability of the crops in resisting adversity is improved, and finally the purposes of increasing the yield and improving the product quality are achieved. Long term application of the powder organic-inorganic water-soluble fertilizer can also improve the soil structure and raise land fertility.

The invention relates to the technical field of biological carbon fertilizers, in particular to a biological-carbon-based compound fertilizer which can prolong the nitrogen fertilizer efficacy period, reduce phosphatic fertilizer leaching loss, increase the utilization rates of nitrogen and phosphorus and sufficiently meet the requirements of growth of bulb flowers, and has the functions of resisting drought, preserving soil moisture and improving soil, and application of the compound fertilizer. The compound fertilizer is prepared from 10-30% of biological carbon (dry basis), 45-60% of chemical fertilizer, 10-20% of medical stone and 10-15% of clay. The chemical fertilizer is preferentially prepared from 10-20% of urea, 25-40% of monopotassium phosphate and 10-20% of potassium sulphate. The raw materials are stirred and dried according to the proportion, sent into a granulation system to be granulated and dried (smaller than 10%), and then the compound fertilizer can be obtained. The biological-carbon-based compound fertilizer is simple and feasible in production process, small in investment, rapid in effect, high in agriculture yield, low in cost, suitable for being applied as base fertilizer for bulb flowers and capable of being widely applied to various types of soil in arid and semi-arid areas, and has wide market aspects and good social and economic benefits.

The invention discloses a total film covering muskmelon cultivating method. The total film covering muskmelon cultivating method comprises the first step of soil preparation and broadcast vicia spp sowing, the second step of vicia spp flattening, the third step of irrigation and film covering and the fourth step of muskmelon seedling growing and field management. Total film covering conducted on soil in a greenhouse is achieved according to the total film covering muskmelon cultivating method. A layer of dry oilseed rape straws covers the surfaces of films among ridges, facilitates adjustment of humidity inside the greenhouse, effectively prevents aphids and other insects from spreading diseases, fast increases the temperature of soil inside ridges, and improves effective green manure plant degradation. According to the total film covering muskmelon cultivating method, viral disease morbidity inside muskmelon land can be reduced from 10-25% in the prior art to 0-3%, fusarium wilt morbidity is reduced by more than 95%, quality is obviously improved, sugar degree of muskmelons is improved by 1-2%, and yield is increased by more than 20% when being compared with yield in the prior art.

The invention discloses a method of utilizing rumen microbes to increase recycling rate of dry anaerobic fermentation organic solid waste and belongs to the field of organic solid waste recycling. The method includes: utilizing ammoniation agents like biogas slurry to pretreat cellulose biomass; mixing the cellulose biomass after being pretreated with poultry-livestock breeding waste according to a C / N proportion of 20-30:1; adding a rumen microbial agent in the mixing process, adjusting pH to 6.5-7.5, and utilizing the characteristic that the rumen microbes are efficient in hydrolysis and can generate methanol. A substrate in the method is low in moisten content, so that the problem of absorption of the biogas slurry after fermentation is avoided; the substrate is pretreated, so that biodegradability of the cellulose biomass waste is improved; the rumen microbial agent domesticated and cultured in vitro is inoculated, so that degrading efficiency and gas generating efficiency of the substrate can be improved and fermentation period can be shortened; the biogas slurry after fermentation has good nitrogen, phosphorus and potassium fertilizer effect, can directly serve as organic fertilizer and is simple in subsequent treatment.

The invention discloses a calcium-iron-silicon-based composite material for restoring heavy metal polluted acid soil and application thereof. The mass ratio of component elements of the composite material is calcium:iron:silicon:manganese:magnesium:phosphorus:aluminum= 30-40:19-25:8-12:1-3:5-6:1-3:2-5, the composite material is particularly prepared from, by volume, 55-70% of calcium silicate, 20-30% of calcium ferrite and 5-15% of compound mixture, and the compound mixture is a mixture of calcium-iron-aluminum oxides, calcium iron silicate, calcium aluminate, calcium-aluminum oxides, calcium-manganese-iron oxides, hydroxyl aluminium phosphate and hydroxyl manganese phosphate. The composite material is used for improving and restoring the heavy metal polluted acid soil, the pH value of the soil can be increased by 0.5-2.5 units, the content of effective state heavy metal in the soil is reduced by 64-98%, the content of heavy metal in agricultural products is reduced by 33-94% compared with a control group, and the yield of the agricultural products is increased by 16-1412% compared with the control group.

The invention relates to an in-situ remediation method for organic contaminated underground water, comprising the specific steps that S2O8<2-> is injected to the organic contaminated region of underground water, an electrified iron electrode is inserted into the organic contaminated region, Fe (II) is provided by regulating the current magnitude of the iron electrode, when the iron electrode is electrified by positive current, the iron electrode partially is dissolved and generates Fe (II), so that S2O8<2-> is activated; when the iron electrode is electrified by negative current, the iron electrode is in the passivation state, so that the reaction activity of S2O8<2-> is restrained and even terminated; and when S2O8<2-> is used up, the iron electrode is used as the anode to continuously electrolyze, so as to provide Fe<2 / 3+> and OH<->, so that the pH of the system is increased to neutral state. The in-situ remediation method solves the difficult problems of in-situ regulation (enhancing and restraining) on the activity of peroxydisulfate and heavy metal release in the in-situ chemical oxidization remediation of peroxydisulfate.

The invention discloses a facility cultivation technique for crop rotation of stropharia rugosoannulata and rice, and belongs to the technical field of edible mushroom cultivation. The facility cultivation technique includes the steps of fermentation of a culture material, construction of a mushroom shed, construction of a ridged bed, seeding, mycelium management and protection, mushroom cultivation and harvesting, and rice planting and harvesting. After the components of the culture material are subjected to composting and fermentation separately, layered laying is adopted, so that nutrient and oxygen supply in the development process of mycelia and fruiting bodies is ensured, the whole fruiting is uniform, the fruiting rate is stable, the total yield is high, the quality is good, the planting cycle is short, and the continuous cropping obstacles can be solved by crop rotation of the stropharia rugosoannulata and rice.

The invention discloses a construction method of dominant bacterial community of syntrophism fatty acid oxidizing bacteria and current-producing bacteria. The syntrophism fatty acid oxidizing bacteria are metabolized by virtue of a volatile organic fatty acid as a substrate; and the fermented tail end product acetic acid is further utilized by the current-producing bacteria under the catalysis of external voltage, so that the gradient degradation of organic matters is achieved; the treatment efficiency of high-concentration organic waste water and the stability of the system are improved; meanwhile, the productive rate of hydrogen is increased; unified pollution control and capacity is reached; the construction method comprises the following steps: gathering the syntrophism fatty acid oxidizing bacteria; gathering the current-producing bacteria; and adding two gathered success bacterial communities to an MEC reactor to remove the volatile organic fatty acids. The construction method has the advantages of being simple in structure, flexible to operate, stable to run, free of basicity adjustment, low in operation cost and the like.

A flush-applied organic bio-fertilizer contains ammonium humate, acidified bone mash, urea, diamine, potassium sulfate, borax, zinc sulfate, magnesium sulfate, manganese sulfate, copper sulfate, sodium molybdate and bacterial component. Its advantages include high fertility, complete nutrients, high solubility, high bioactivity and improving soil.

The invention relates to silicon-titanium fertilizer and a preparation method thereof. The silicon-titanium fertilizer is prepared from raw materials in parts by weight as follows: 10-12 parts of silicon dioxide, 0.3-0.5 parts of titanium dioxide, 15-20 parts of humic acid, 6-10 parts of corncobs, 7-12 parts of soybean meal, 5-8 parts of corn flour, 10-15 parts of pig manure, 2-5 parts of tourmaline, 0.01-0.1 parts of sodium chloride, 0.2-0.3 parts of sodium pyrophosphate, 0.05-0.1 parts of ammonium molybdate, 0.2-0.4 parts of carboxymethyl cellulose sodium, 10-12 parts of a leavening agent and 900-1000 parts of water. The silicon-titanium fertilizer contains multiple elements such as silicon, titanium, boron, iron, manganese, zinc, copper and the like and can be in a needle shape on leafsurfaces when sprayed to the leaf surfaces so as to repel pests such as red spider mite and the like, hazardous substances are adsorbed and decomposed, plant resistance is improved, nutrient uptake ofthe plants is promoted, crop quality is improved, penetration rate for cell membranes is increased, and plant metabolism is promoted.

A vegetation concrete improved microbial agent comprises the following raw materials in parts by weight: a mixed microbial fermentation powder, bentonite, diatomite, magnesium sulfate, zinc sulfate and boric acid, wherein the mixed microbial fermentation powder is prepared by the steps of carrying out press filtration, flash evaporation and drying of amplified cultured azotobacter chroococcum, bacillus megatherium and bacillus mucilaginosus, to respectively obtain dry powders of azotobacter chroococcum, bacillus megatherium and bacillus mucilaginosus, and mixing the dry powders according to a certain proportion. The vegetation concrete improved microbial agent and the preparation method thereof provided by the invention can solve the problem that the number and types of microorganisms cannot be increased as soon as possible; through the proportion of different beneficial microorganisms, a physicochemical environment of soil is changed, the biological chemical activity of the soil is improved, the fertilizer utilization ratio and the use effect are improved, ultimately, the growth of plants is promoted, and the purpose of the vegetation concrete fertility sustainability is achieved.

The invention provides a method for preparing an arsenic-cadmium passivator, the arsenic-cadmium passivator prepared through the method and an application. The preparation method comprises the following steps that an aluminosilicate material is mixed with an activating agent and a fluxing agent, and then undergoes high-temperature roasting treatment; the roasted material, ferric salt and manganesesalt are added into water, and the system pH value is adjusted for reaction; and solid-liquid separation is performed, the obtained solid is dried to obtain the passivator. The passivator is a novelpassivator which is efficient, environment-friendly, low in cost and capable of being used for treating soil (such as a farmland and a field), waste residues or water bodies with arsenic and cadmium contents exceeding the standard, the technological difficulty that arsenic (trivalent arsenic / pentavalent arsenic) and cadmium cannot be efficiently passivated at the same time is solved, and the passivator and the method have very good popularization and application values.

The invention provides a soil remediation fertilizer prepared from kitchen waste as well as a preparation method and an application of the soil remediation fertilizer. The soil remediation fertilizeris prepared from kitchen waste subjected to anaerobic heat treatment, a complex microbial inoculant and a synergistic component. The soil remediation fertilizer prepared from the kitchen waste can reduce resource waste and effectively improve the problems of grease, germs and worm eggs of the kitchen waste, so that the physical, chemical and biological properties of soil are effectively improved,soil nutrients are maintained, and the utilization rate of the soil nutrients is increased.

The invention discloses a facility cultivation technology of crop rotation of morchellaconica and carrot, and belongs to the technical field of edible fungus cultivation. The method specifically comprises the following steps: building a mushroom shed, constructing ridge beds, carrying out sowing, building small arch sheds, supplementing a nutrient matrix, carrying out mycelium management and protection, carrying out mushroom acceleration, carrying out mushroom cultivation and harvesting, planting carrots and carrying out harvesting. According to the invention, the facility cultivation with a greenhouse and the small arch sheds is utilized, so that the influence of external environment to the growth of morchellaconica is avoided, fruiting is uniform, the fruiting rate is stable, and a plurality of problems such as low yield, long period and the like are solved. Continuous cropping obstacles are solved through continuous cropping with carrots, and an idea is provided for the sustainabledevelopment of morchellaconica industry.

The invention discloses a watermelon plastic film full-mulching cultivation method. The watermelon plastic film full-mulching cultivation method comprises a first step of preparing a land and sowing laguminosae, a second step of evening the laguminosae, a third step of conducting irrigation and covering plastic film, and a fourth step of growing watermelon seedlings and conducting filed management. According to the watermelon plastic film full-mulching cultivation method, due to the fact that the land is fully covered by the two-color plastic film, the two-color plastic film has the effects of restraining weeds and avoiding aphids, the aphids and other insects are effectively prevented from spreading diseases, the land temperature inside a ridge is rapidly improved, and effective degradation of green manure plants is improved. Due to the fact that quick lime is applied, soil acidification can be effectively relieved, the calcium content of soil can be increased, and the rate of watermelon cracking in the watermelon mature period is reduced. Due to the fact that a layer of dry straw covers the plastic film arranged between every two ridges, moistures is absorbed, the dryness degree inside a green house is improved, fixation of watermelon vines is facilitated, and watermelon growth is facilitated. The incidence of fusarium wilt is reduced by 96% compared with that of the prior art. The quality of watermelons is remarkably improved. The sugar degree of each watermelon is increased by 1%-3%. The yield is increased by 200%-600% compared with that of the prior art.

The invention discloses a method for preparing biochar from tea garden waste and the biochar. Waste such as tea branches and tea leaves obtained after tea garden pruning is used as a raw material forpreparing biochar; the prepared biochar has the characteristics of high pH value, developed pore structure, large specific surface area, various element varieties and the like, so that the biochar hasgood adsorption performance, can adsorb and fix various pollutants in an environment medium of a production place and reduce the bioavailability of the pollutants, can be effectively applied to the fields of agriculture and environment, and has wide application prospects. And potential environmental risks are reduced.

The invention relates to a tomato package fertilizer for prevention and control of root-knot nematode. The tomato package fertilizer includes an alkaline soil conditioner, a paecilomyces lilacinus agent and a humic acid-containing water-soluble fertilizer; the soil conditioner silicon-calcium-potassium-magnesium fertilizer is evenly broadcasted during soil tillage; the paecilomyces lilacinus agentis applied during transplanting; the humic acid-containing water-soluble fertilizer is applied after fixed planting. The package fertilizer is in synergtic mutual promotion, increases the preventioneffect from different views, also improves acidified soil, satisfies the nutrition of the whole growth period of tomato, has no pesticide application, is combined with tomato fertilization and root-knot nematode generation laws, is performed with pure fertilizers, achieves the integrated efficacy of drugs and fertilizers, and is suitable for the whole growth process of the tomato; and in addition,the package fertilizer has the advantages of safety, environmental protection and more prominent continuous application effect, and is of great promotion value in prevention and control of root-knotnematode.

The invention relates to a method for promoting cucumber growth in a continuous cropping field by employing a microbial organic fertilizer. The method comprises the following steps: (1) screening varieties, namely selecting high-quality cucumber variety which is wide in cultivated area, good in prematurity and strong in growth potential; (2) determining the concentration of an organic fertilizer, namely carrying out serial dilution on a dongshengbao (Chinese character) liquid organic fertilizer, determining the concentration of the liquid organic fertilizer to be 5*10<4>ppm according to the requirements of the cucumber on EC and pH of soil; (3) accelerating germination of cucumber, namely carrying out hot water treatment of cucumber seeds, and seeding after germinating; (4) applying an organic fertilizer, enclosing soil of the continuous cropping field in a greenhouse into 16 flowerpots for pot culture, fertilizing the microbial organic fertilizer with the concentration of 5*10<4>ppm into the flowerpot as a base fertilizer a week before field planting of cucumber seedlings; (5) transplanting the cucumber seedlings, when the cucumber seedlings grow into 4-5 leaves, transplanting the cucumber seedlings into 19cm*20cm of flowerpot; and (6) managing after transplanting, carrying out conventional management on the potted cucumber after transplanting, and ensuring cucumber growth at a preference temperature, wherein the temperature is 20-25 DEG C in daytime and the temperature is 15-20 DEG C at night. The method for promoting cucumber growth in the continuous cropping field by employing the microbial organic fertilizer aims at improving the physical and chemical properties of the soil in the continuous cropping field, promoting cucumber growth and lowering the morbidity grade of the cucumber.

The invention discloses a preparation method of an acidic soil microenvironment modifier. The method comprises the following steps: adding attapulgite ore powder into tap water, and stirring to obtain a first suspension; adding NaOH, KOH and Ca(OH)2 into the first suspension to obtain a second suspension; adding sodium humate to the second suspension, irradiating by using high energy electron beams to obtain humic acid-alkalized attapulgite; and uniformly mixing the humic acid-alkalized attapulgite with rice husk ash to obtain the modifier. The modifier can form a micro-nano network between a plow layer and deep soil, reduces the leaching loss of base cations in the plow layer through chelating, coordination, adsorption, hydrogen bond, electrostatic attraction and other effects, inhibits the reduction of the base saturation percentage of soil, alleviates soil acidification, improves the microenvironment of root micro-area soil, promotes root growth and improves the acid resistance of crops in order to increase the emergence rate and improve the output; and the method has the advantages of small use amount, low cost, environmentally friendly raw materials, and high efficiency.

The invention belongs to the technical fields of fertilizers and fertilizer manufacturing, and discloses a base fertilizer adapting to improvement of soil in protected areas and a preparation method thereof. The base fertilizer comprises the raw materials by mass: 10-30 parts of fresh chicken manure and cow manure, 30-50 parts of coconut bran, 10-15 parts of humic acid, 10-15 parts of shell powder, 10-15 parts of clay, 15-20 parts of corn cobs, 10-15 parts of wheat bran, 10-15 parts of bagasse, 8-10 parts of quicklime, 0.3-0.6 part of borax, 0.8-1.0 part of ferrous sulfate, 0.3-0.6 part of zinc sulfate, 0.3-0.6 part of magnesium sulfate, 0.2-0.5 part of bacillus subtilis, and 0.2-0.4 part of an insecticide. The problem of soil acidification is effectively alleviated, the problems of soil salinization and compaction are effectively solved, the disease resistance effect of the soil is enhanced, the damage of plants caused by insect pests in the soil is effectively prevented, and with addition of a certain amount of coconut bran, the soil permeability, water and fertilizer conservation capacity are improved, and the land can be also effectively protected.

The invention belongs to the field of farmland soil remediation, and particularly discloses a conditioner for mercury-contaminated soil remediation treatment, and a preparation method thereof, whereinthe conditioner is prepared from the following five raw materials by weight: 10-15% of bentonite, 30-40% of quick lime, 10-20% of sepiolite powder, 30-35% of humic acid and 5-10% of chitosan. According to the invention, the conditioner has characteristics of simple raw material composition, wide source, low price, simple preparation method and low repair cost, is suitable for large-area popularization, and can reduce the contents of mercury in various forms.

The invention belongs to the field of organic fertilizers and particularly relates to a special organic fertilizer for a tea garden and a preparation method of the special organic fertilizer. Earthworms are utilized to digest and decompose organic wastes subjected to compounding, and then, after most of the earthworms are transferred, the residual earthworms and earthworm feces are applied to the tea garden together as the special organic fertilizer for the tea garden. With compounding of a nutrient ratio of organic materials subjected to compounding and a nutrient demand ratio of tea trees, the special organic fertilizer also contains all varieties of micronutrients needed by growth of the tea trees. The organic fertilizer is low in cost, the raw material sources are wide, the investment cost is low, the preparation process simple, thus the organic fertilizer is suitable for being produced and directly used on site in tea gardens by farmers and tea enterprises. The organic fertilizer is made of pure organic components, and improves the soil physical chemistry, the microorganism attribution and the ecological function of tea garden soil when ensuring supply of effective nutrients including nitrogen, phosphorus, potassium, trace elements and the like.