1248results about How to "Improve fertility" patented technology

The invention relates to a restoration method for a damaged ecosystem in a steep-slope area in a water-level-fluctuating zone of a reservoir. The method comprises the following steps:when the impounded water level is at the lowest point, cleaning the upstream slope in the water-level-fluctuating zone, and manually tamping; digging planting holes at the top of the slope, and planting Chinese red pines and the like to form a multifunctional protective forest belt; digging planting grooves and planting holes within the range of the water-level-fluctuating zone, laying jute geotextile, planting vetiver within the range with the water-level-fluctuating depth of 2m to form a hedgerow; and mixedly planting vetiver and wire grass within the range with the water-level-fluctuating depth of 2-10m to form a combined vegetation slope restoration belt. The protective forest belt, the hedgerow and the combined vegetation slope restoration belt form a three-dimensional restoration space together, thereby ensuring that plants can take roots and restore in the steep-slope area in the water-level-fluctuating zone. By restoring the vegetation in large area, the invention effectively reduces the overland flow and the soil erosion, and improves the fertility and the properties of the soil, thereby restoring the damaged ecosystem. The invention has the advantages of convenient construction and less investment, can not be easily damaged by water, and is applicable to the water-level-fluctuating zone of a reservoir with large water-level-fluctuating range and precipitous topography.

The invention discloses a biostimulation method for remediation of oil-polluted soil. In the method, on the premise of not adding an oil pollutant biodegrading bacterial agent, a soil conditioner is added to improve the soil environment, reduce soil stickiness, increase the soil permeability, adjust the water-retaining capacity of the soil, adjust inorganic and organic nutrients necessary for local microbe growth, maintain the pH value of the soil close to neutrality, promote oil pollutant degrading microbes in the soil to grow and propagate, and improve the oil pollutant degrading efficiency of the local microbes; by planting plants, the microenvironment of the soil near root systems of the plants is improved, the plants secrete organics with low molecular weight such as amino acid to the root systems so as to stimulate the massive propagation of the local microbes and indirectly promote oil pollutant degradation by the microbes of the root systems; and the biostimulation method has the advantages of accelerating the remediation of the oil-polluted soil and restoring the original state of the soil.

The invention discloses a chemical and microorganism combined remediation method and application of compound heavy metal polluted soil. Heavy metal ions in polluted soil are immobilized by adding a polluted soil chemical improver, and then the remediation of the polluted soil is continuously enhanced through an efficient heavy metal inhibiting microorganism functional fungicide and a soil improver microorganism function fungicide, thus the defect that a conventional chemical improver can well immobilize the single heavy metal and the heavy metals with similar natures but can not reach the standard when being used for remedying the compound heavy metal polluted soil is overcome; meanwhile, the chemical and microorganism combined remediation method integrates economic and environmental benefits, and can be applied to the remediation of the compound heavy metal polluted soil on large scale.

The invention discloses a special saline-alkali-soil improvement fertilizer prepared by modification with flue gas desulfurization gypsum and a preparation method thereof. The special improvement fertilizer comprises the following components in parts by weight: 40-80 parts of flue gas desulfurization gypsum, 1-3 parts of citric acid, 0.5-1.5 parts of magnesium sulfate, 1-5 parts of aluminum sulfate, 1-5 parts of ferrous sulfate, 10-30 parts of weathered coal, 10-20 parts of cattle manure or chicken manure, 1-5 parts of urea, 0.5-2.5 parts of ammonium sulfate, 1-3 parts of potassium sulfate, 1-3 parts of monoammonium phosphate, 0.1-0.5 part of zinc sulfate, 0.1-0.5 part of manganese sulfate and 3-10 parts of bentonite. The fertilizer is reasonable in design, provides an effective solution for inland saline-alkali soil of China, and has higher practical value and wide market prospects.

The invention discloses a method for planting organic passion fruit trees. The method includes the steps of variety selection, site selection, soil preparation, soil pH adjustment, establishment of a passion fruit tree foundation, field planting, reshaping and pruning, field management, blossoming, fruit yielding and the like. According to the method, organic fertilizer and a low-toxicity prevention method are adopted in fertilization and pest control, so that the pulp of produced passion fruits is full of yellow fruit juice, the content of sugar is high, the color is bright, the yield reaches up to 2 tons per mu each year, pollution is avoided, and five seasons of fruits can be harvested each year. The successful planting of the organic passion fruit trees provides a theoretical and practical basis for creating incomes of local farmers. According to the method, a leeward apricus flat ground is selected, and the place where a good source of water is obtained, the soil layer is thick, fertility of the soil is above the average and transportation is convenient is used as a planting foundation, so that it is guaranteed that the passion fruit trees can grow in a good environment, the roots of nursery-grown plants are planted in furrows and exposed to the sun, hence, the roots can better absorb sunshine, and fertilization and weeding are further facilitated.

The invention discloses a special improved organic fertilizer for saline-alkali soil. The special improved organic fertilizer comprises the following components by weight: 89%-91% of straw organic fertilizer, 7%-9% of saline-alkali soil modified material, and 1%-3% of medium-micro element additive. The invention further discloses a preparation method for the special improved organic fertilizer for saline-alkali soil. The preparation method comprises the following steps: mixing and piling 89%-91% of the straw organic fertilizer, 7%-9% of the saline-alkali soil modified material, and 1%-3% of the medium-micro element additive by weight to be long strips; uniformly stirring the long strips by a turner, adding hydrolytic polymaleic anhydride organic aqueous solution, and regulating the pH of the solution to be 3-4 to obtain the special improved organic fertilizer for saline-alkali soil. The special improved organic fertilizer for saline-alkali soil can effectively improve soil hardening, increase micro elements and organic nutritional ingredients of humic acid in the saline-alkali soil and improve quality of humus, thereby improving soil fertility and achieving survival rate of planted seedling of more than 95%.

The invention discloses an organic microorganism-containing ecological fertilizer and a production method thereof. The ecological fertilizer consists of a three-layer structure, an inner layer is made of compound fertilizer granules, an urease inhibitor and nitrification inhibitor coating is used as a middle layer, an outer layer is made of an organic microorganism coating agent prepared by using an active bacteria packing method; and the production method comprises the steps of mixing and granulating, inhibitor coating, and organic microorganism coating. The production method disclosed by the invention is simple, and a prepared ecological fertilizer is complete in nutrients, ensures a high survival rate due to mixed bacterial manures, ensures long survival time of effective living bacteria, has sufficient inorganic nutrients, is convenient to apply, can avoid topdressing, and promotes the development of non-toxic and harmless fertilizers; and the ecological fertilizer has an obvious antagonism effect on continuous cropping pathogenic fungi, therefore, the proliferation of bacteria is effectively promoted, the micro-ecological environment of soil is significantly improved, and after the crops are harvested, the soil is fertile so that next-stubble crops can grow very well.

(a) A copper alloy film containing at least two types of metal elements in addition to copper is formed on the surface of an insulator containing oxygen and formed on a semiconductor substrate. (b) A metal film made of pure copper or copper alloy is formed on the copper alloy film. (c) After the step (a) or (b), heat treatment is performed under the condition that a metal oxide film is formed on a surface of the insulator through reaction between the oxygen in the insulator and the metal elements in the copper alloy film.

The invention discloses a biological pesticidal organic fertilizer and a preparation method thereof. The biological pesticidal organic fertilizer is prepared from the following raw materials in parts by weight: 40-50 parts of pig manure, 20-30 parts of tea seed pulp, 10-15 parts of coffee grounds, 8-12 parts of paulownia sawdust, 5-10 parts of phosphogypsum, 4-8 parts of corn cob, 5-10 parts of pepper seed cake, 10-15 parts of mushroom dreg, 8-12 parts of wheat bran, 15-20 parts of bentonite, 10-15 parts of opoka, 2-3 parts of ferrous sulfate, 1-2 parts of manganese sulfate, 3-5 parts of humic acid, 1-2 parts of chinese tallow tree root and bark, 2-3 parts of sophora alopecuroides, 1-2 parts of stemona, 1-3 parts of Artemisia annua, 1.5-2.5 parts of ailanthus leaf, 2-3 parts of derris and 1-2 parts of Radix Euphorbiae Ebractealatae. The organic fertilizer disclosed by the invention has multiple effects of providing nutrients, improving the soil structure, preventing and treating pests and diseases and the like, can promote the crops to quickly grow, enhances the stress tolerance of the crops, can have favorable preventing and treating effects on nematodes and soil insects, reduces or avoids use of chemical pesticides, enhances the soil fertility, regulates the ecological equilibrium of soil, improves the quality of agricultural products, has no chemical residues, and implements yield increase and income increase of agricultural products.

The invention discloses a high-quality and high-production cultivating technology of cane shoots, which comprises the steps of soil selection and preparation, germchit preparation, field planting, field management and harvest. According to the invention, before the field planting of cane shoots, sterilization treatment is performed on the soil by adopting quick lime, garlic dreg powder, tea bran powder and wood vinegar, so that the growing environment of cane shoots is purified, and the fertility of soil is improved at the same time; during the topdressing process, home-made slow-release organic granular fertilizer is applied, the fertilizer efficiency is more durable, and a large amount of fertilizer does not run away caused by climatic change, so that the fertilizer efficiency is greatly improved, the soil is improved at the same time, and the soil is prevented from hardening. The cultivating method is simple and feasible, low in cost, and high in yield coefficient; the cane shoots are convenient to manage, and applicable to large-scale cultivation; through large-area popularization, the quality and yield of cane shoots can be greatly improved and stabilized, so that the high-quality and high-production cultivating technology of cane shoots has prominent social, economic and ecological benefits.

The invention discloses a method for inter-planting forage grass in orchards at a karst rock desertification region, in particular a method for inter-planting leguminous forage grass and gramineous forage grass below fruit trees in the orchards, wherein the mixing weight ratio of the leguminous forage grass to the gramineous forage grass is (5-7):(3-5), and the seeding rate is 1.5-2.0 kg/mu. According to the method, the leguminous forage grass and the gramineous forage grass are selected and sowed in a mixed way according to the characteristics of high yield and low crude protein content of the gramineous forage grass and high crude protein content of the leguminous forage grass, so that the yield and the quality of the forage grass are improved, and the palatability of the forage grass and the absorption of livestock to the nutrients of the forage grass are enhanced; by performing mixed sowing on the leguminous forage grass and the gramineous forage grass according to a weight ratio of (5-7):(3-5) under fruit trees, the coverage ratio of land vegetation of the orchards is increased and water and soil loss is greatly reduced; and meanwhile, the soil fertility of the orchards can also be increased, the environment of the orchards is improved, the productivity of land is improved, and the aims of increasing the yield of fruit trees and the yield of the forage grass are fulfilled.

The invention relates to an agricultural microbial compound bacterial fertilizer, in particular to a method for producing a microbial compound bacterial fertilizer. The method is characterized in that activated sludge fermented by a fermentation plant during sewage treatment is used as matrix, molasses is added into the matrix as a culture medium, compound bacteria are grafted into the culture medium after adding water to ferment, then grass carbon is added into the culture medium, and the mixture is dried to form the compound bacterial fertilizer. The method realizes reutilization of sludge waste, and provides economic and efficient microbial sludge bacterial fertilizer for the development of green ecological agriculture.

The invention discloses a preparation method of modified micron zero-valent iron and an application method of the modified micron zero-valent iron in remediation of heavy metal contaminated soil. The preparation method of the modified micron zero-valent iron comprises the steps of cleaning of iron raw materials, preparation of micro iron, ultrafine grinding and modifying treatment. A modifying agent composed of water, xanthan gum, sulfide, a stabilizing agent, zeolite and blast furnace slag is adopted in the step of modifying treatment. The preparation method of the modified micron zero-valent iron has the beneficial effects that the production process of the modified micron zero-valent iron is simple, and the effect similar or superior to micron zero-valent iron is achieved while the cost is reduced; and in addition, the reaction activity is controlled, the oxidation rate is decreased, excellent stability is obtained, and the acting time of the micron zero-valent iron is longer. By the adoption of the application method of the modified micron zero-valent iron, the remediation cost of heavy metal contaminated underground water is further reduced. According to the preparation method of the modified micron zero-valent iron and the application method of the modified micron zero-valent iron in remediation of heavy metal contaminated soil, organic fertilizer is added in the soil treatment process so that the fertility of soil can be improved, the structure of soil can be improved through humic acid produced by the organic fertilizer, heavy metal elements, such as lead, chromium and arsenic, in underground water can be removed, and the concentration of pollutants such as nitrate and perchlorate can be reduced.

The invention belongs to the technical field of manure, and in particular relates to special organic microbial bacterial manure for garlic and a production method for the special organic microbial bacterial manure for garlic. The special organic microbial bacterial manure for garlic comprises the following components: furfural residue, mushroom bran, composite microbial agent, ammonium hydrogen carbonate, calcium superphosphate, potassium chloride, zinc sulfate, plant ash, potassium sulfate, animal manure, potassium humate, rice hull powder and rape seed cakes. The special organic microbial bacterial manure for garlic, prepared by adopting the method disclosed by the invention, contains a large amount of nutrients required for the growth of garlic and various trace elements and amino acids, and has the effects of efficiently, synergistically and enduringly improving soil, improving the fertility, resisting diseases and the like; in addition, soil probiotic floras are added into organic matters, so that the nutrients can be better absorbed and utilized, and the micro-ecological environment of the soil can be continually repaired. Through testing, the special organic microbial bacterial manure for garlic, disclosed by the invention, can be used for effectively improving the yield of garlic by 20-30%.

The invention produces a new humic acid bio-fertilizer, which comprises: using weathered coal and good organic (such as maize-ear and domestic animal manure) as main material with mineral phosphorus, potash fertilizer, chemical nitrogen fertiliser and microelement; ammonifying the wethered coal with size less than 80 items to mix with organic; accessing composite ferment fungus for solid fermentation to cut process and time. This invention reduces cost, overcomes shortcomings of high-nitrogen formula fertilizer, and has spread value.

The invention relates to a composition for improving soil, in particular relates to a saline-alkali soil conditioner. The saline-alkali soil conditioner is prepared by mixing the following components by weight percent: 20%-35% of sulfur powder, 20%-30% of humic acid, 5%-10% of bentonite, 20%-25% of magnesium sulfate heptahydrate, 8%-12% of calcium superphosphate, 1%-2% of zinc sulfate heptahydrate and 2%-3% of boric acid. The saline-alkali soil conditioner can be used for regulating acid-base level of the soil, and effectively supplementing microelements in the soil, improving the nutritional deficiency symptom of crops, chelating harmful heavy metal elements in the soil, reducing saline and alkali degree, promoting the soil to form a granular structure, improving root growth environment of crops, enhancing saline and alkali resistance of crops, disease resistance and cultivation of resilience, reducing the harm of saline and alkali to plant roots, and releasing the effective phosphorous solidified by the soil, increasing soil fertility, holding water and saving fertilizer so as to finally and completely improve the soil, recover the soil fertility, increase both production and income and improve crop quality and utilization rate of the fertilizer.

The invention relates to the fields of waste utilization and water absorbents and in particular relates to a carbon-based water absorbent and a preparation method thereof. The carbon-based water absorbent is prepared from the following raw materials in parts by weight: 5.245-5.255 parts of partially neutralized acrylic acid, 1.5-2.0 parts of acrylamide, 1.72-2.58 parts of filler, 0.1-0.22 part of initiator and 0.001-0.0015 part of cross-linking agent, wherein the neutralization of the partially neutralized acrylic acid is 70-80 percent; the filler comprises charcoal and bentonite; a weight ratio of the charcoal to the bentonite is 1: (1-2). According to the carbon-based water absorbent and the preparation method thereof provided by the invention, the water absorbent has high water absorbent rate and is prevented from being mildewed and decomposed; after the water absorbent is buried in the ground, the soil fertility can be improved through the mineral trace elements contained in the water absorbent, and the soil structure is improved. Therefore, the water absorbent has the effects of relieving pressure of biomass raw material treatment and environmental pollution.

The invention discloses an organic compound fertilizer special for tea, comprising: 19-24 percent of humic acidic ammonium phosphorus kalium fertilizer, 5-6 percent of phosphate fertilizer, 5-6 percent of potassium fertilizer, 20-22 percent of nitrogenous fertilizer, 1-4 percent of microelement and 45-50 percent of active organic materials. As the organic compound fertilizer special for the tea provides more nutrition, tea can grow fast, and the yield of tea can be improved. Moreover, the tea with the organic compound fertilizer special for the tea contains more mineral composition and microelement which are essential to the health of human beings so as to improve the quality of the tea. The invention also provides a preparation method of the organic compound fertilizer special for the tea.

The invention belongs to the field of agriculture, which relates to a slow control release biological inorganic and organic mixed fertilizer. The mixing fertilizer is prepared by fully mixing the following components in percentage by weight: 3%-10% of beneficial microbial agent, 0.4%-1% of fertilizer slow control release agent, 5%-12% of organic matter, 0.2%-10% of plant growth stimulin, 15%-25% of nitrogen, 5%-12% of phosphorus, 6%-15% of potassium, and 2%-10% of middle trace element. The invention not only has the advantages of high nutrient concentration and simple production process, but also can enhance the utilization rate of the fertilizer, save the fertilizer, increase the output, improve the soil, and promote the sustainable development of agriculture and environment protection.

The invention discloses a fermented organic fertilizer. The fermented organic fertilizer comprises the following components in parts by mass: 1000-1500 parts of stalk, 1000-1300 parts of chicken manure, 1000-1500 parts of cattle manure, 800-1200 parts of pig manure, 1200-1800 parts of soybean meal, 35-50 parts of a microbial agent, 10-20 parts of peat humic acid, 50-80 parts of corn meal, 60-90 parts of composite enzyme preparation and 30-60 parts of complex bacteria. The invention also discloses a fermentation method of the fermented organic fertilizer. As the method adopts the microbial bacteria and the composite enzyme preparation, the fermentation efficiency is improved, the fermentation time is effectively reduced, the consumption amount of water, electricity and steam is reduced, the production cost is lowered, and the method is suitable for industrial large-scale production; the fermented organic fertilizer disclosed by the invention has no malodor when used in fields, is cost-saving due to the reduction in the consumption, does not result in soil impoverishment, hardening and salinization, and meets the trend of energy-saving, environment-friendly and sustainable development.

The invention discloses a biological salt-degrading bacterial fertilizer consisting of the following components by weight proportion: 0.0013 to 0.0045 portions of gibberellin, 0.00002 to 0.0002 portions of cytokinins, 15 to 35 portions of bacillus megaterium, 50 to 80 portions of salt-degrading flora, 5 to 15 portions of amino acid and 2 to 10 portions of humic acid. The materials are evenly mixed and air dried. The bacterial fertilizer is formed by being extracted from marine microorganisms, rejuvenation, expanding propagation and being remixed with a plurality of trace elements. The bacterial fertilizer is scientific in formulation and very strong in activity, can be widely applied to salt lick improvement and a secondary salinization treatment, improves and optimizes soil environment and improves the deteriorated soil environment caused by the long-term use of chemical fertilizers and salt containing organic fertilizers (dungs). The bacterial fertilizer can facilitate the development of the roots of crops and can improve the ability of absorbing night soil. By applying the biological salt-degrading bacterial fertilizer, the fertilizer can facilitate the even seedling, uniform seedling and strong seedling at the earlier stage of crops, the strong nutrient transmission capacity at the middle stage and no premature senescence at the later stage.

The present invention is directed to compounds, pharmaceutical compositions, and methods for modulating processes mediated by Progesterone Receptor. Also provided are methods of making such compounds and pharmaceutical compositions.

The invention relates to a preparation method of a multifunctional repair agent used for governing heavy metal contaminated soil, in particular to biomass charcoal and clay compound which is generated in a nitrogen and phosphorus solution by using agricultural biomass waste and clay mineral as raw materials and conducting magnesium salt modification and high-temperature roasting, and loaded with struvite. When lands are utilized, the compound can conduct passivation and stabilization on heavy metal ions in soil while having the functions of slow release fertilizer, mobility and bioavailability of heavy metal are lowered to the maximum extent, and the aim of repairing heavy metal contaminated soil in situ is achieved. The prepared repair agent has the dual functions of enhancing soil fertilizer efficiency and stabilizing heavy metal, and the preparation method is simple, quick in efficacy, low in cost and capable of being used for efficient in-situ repair of farmlands and other industrial heavy metal polluted soil.

The invention relates to a heavy metal contaminated soil remediation agent and a preparing method thereof, and belongs to the field of soil pollution abatement in environment protection. The heavy metal contaminated soil remediation agent is mainly composed of papermaking sludge, quick lime, sodium bentonite and other bentonite ion exchangers, chitosan and chitosan derivatives. The soil remediation agent is added to soil which is polluted by heavy metal in a proportion of 1:25-50 (remediation agent/soil oven dry mass), so that the content of exchangeable heavy metal which seriously pollutes the environment in the soil is lowered by 30%-70%, and the soil fertility is increased. The heavy metal contaminated soil remediation agent has the advantages of being low in cost, simple in operation, good in use effect, easy to popularize in large scale, and capable of not causing secondary pollution.

The invention relates to a special organic/inorganic compound fertilizer for tea and a preparation method thereof. The compound fertilizer is characterized by being prepared from the following raw materials in parts by weight: 500-600 parts of chicken manure, 40-50 parts of peat, 30-35 parts of urea, 50-60 parts of monoammonium phosphate, 30-35 parts of diammonium phosphate, 12-14 parts of potassium chloride, 1-2 parts of ammonium molybdate, 1-2 parts of zinc sulfate, 2-3 parts of ferrous sulfate, 3-4 parts of fermenting microbial inoculum, 10-12 parts of weathered coal, 0.1-0.14 part of diethyl aminoethyl hexanoate (DA-6), 12-14 parts of iron ore tailing, 6-9 parts of bamboo charcoal powder, 2-3 parts of soybean oil, 1-2 parts of eucalyptus oil and 15-20 parts of soil conditioner. By fermenting with the chicken manure, the compound fertilizer improves the soil fertility of a tea garden, increases the organic substances and improves the soil; and meanwhile, the formula contains macro, secondary and minor elements as well as slow-release components, and the fertilizer efficiency slowly releases, thus meeting the requirements of tea in the growth period and improving the quality and yield of tea.

The invention discloses a special compound microbial fertilizer for tomatoes and a preparation method thereof. The special compound microbial fertilizer for tomatoes comprises components in percentage by weight as follows: 8%-12% of potassium sulfate, 0.2%-1.0% of manganese sulfate, 1%-3% of ferrous sulfate, 5%-10% of bentonite, 15%-20% of pig manure, 4%-6% of pork slaughter-house waste, 4%-8% of humic acid, 10%-15% of watermelon seedling tendrils, 8%-12% of grass carbon, 5%-8% of castor-oil plant residues, 8%-12% of monosodium glutamate residues, 12%-18% of cake meal, 0.2%-0.4% of bacillus megaterium, 0.3%-0.5% of bacillus subtilis, 0.8%-1% of streptomyces griseus, 0.2%-0.4% of streptomyces jingyangensis, 0.8%-1.2% of Aspergillus oryzae and 0.6%-0.8% of cellulose, and the sum of all the components is 100%. Compared with common compound fertilizers, the special compound microbial fertilizer for the tomatoes has the advantages that the yield increase range is larger, the quality is improved obviously, and the produced tomatoes are sweeter in taste, brighter in color and more favored by consumers.

A method for cultivating potato in the idle rice field in the winter includes such steps as selecting proper variety, immersing seeds, cutting blocks, drying in the air, mixing chemical with seeds, ditching, making bed, applying fertilizer, sowing in the last ten-days period of December, covering with rice straw and ground film, breaking film to leading the seedlings, applying diniconazole for suppressing the growth of seedlings preventing and treating disease and pest, and harvesting. Its advantage is high yield.

The invention discloses a fertilizer, which comprises the following raw materials by weight: 50-100 parts of straw powder, 60-90 parts of livestock manure, 20-40 parts of plant ash, 20-40 parts of acrylic acid, 10-20 parts of diammonium hydrogen phosphate, 10-30 parts of potassium dihydrogen phosphate, 0.5-4 parts of sodium tetraborate, 0.2-3 parts of boric acid, 1-5 parts of amino acid, 1-7 parts of a compound microbial agent, 0.2-4 parts of cellulose, and 1-5 parts of medium trace elements. Through mixed use of organic components, inorganic components and the microbial agent, all the parts have a synergistic effect, so that the fertilizer has relatively high fertility, and meets the nutritional needs of fruit tree growth.

A preparation method of the light absorption layer of a copper-indium-gallium-sulfur-selenium film solar cell is provided. The method employs a non-vacuum liquid-phase chemical technique, which comprises following steps: forming source solution containing copper, indium, gallium, sulfur and selenium; using the solution to form a precursor film on a substrate by a non-vacuum liquid-phase process; drying and annealing the precursor film. Thus, a compound film of copper-indium-gallium-sulfur-selenium is gained.

The invention relates to the technical field of soil conditioners and particularly relates to a soil heavy metal biological fixing agent and an application method thereof. The formula of the soil heavy metal biological fixing agent is that every one kilogram of an organic fertilizer is added with 2-10 g (109 CFU/g) of B. natto solid leavening agent, 2-10 g (109 CFU/g) of B.mucilaginosus solid leavening agent, 2-6 g (109 CFU/g) of B.megaterium solid leavening agent and 4-10 g (1010 CFU/g) of Trichoderma koningii solid leavening agent, wherein the main ingredients of the biological organic fertilizer contain more than 40% of organic matter, more than 20 million/g of effective viable count, and more than 5% of total nutrient. The soil heavy metal biological fixing agent is low in cost, has few environmental risks, remarkably reduces the absorption of the heavy metals of the crops, improves the soil fertility, effectively prevents and cures the soil-borne diseases and increases the economic benefit of the crops.