266 results about "Soil aggregate" patented technology

The invention relates to the field of fertilizers, in particular to a macroelement water-soluble fertilizer and a preparation method thereof.The preparation method comprises the steps that a composite biochar material is prepared from biochar, loaded metal modified biochar and an iron metal material, and then the composite biochar material is compounded with tripotassium phosphate, monopotassium phosphate, disodium octoborate tetrahydrate, zinc sulfate monohydrate and the like; the finally prepared fertilizer can realize accurate fertilizer supply, the iron metal organic framework material efficiently converts nitrate nitrogen into ammonium nitrogen and cooperates with a large amount of trace elements such as tripotassium phosphate, the requirements of crops at all stages are met, nutrients in key periods are guaranteed, pores of the composite biochar material adsorb the nutrients, nutrient slow release is realized, root system interpenetration resistance is reduced, stress resistance is enhanced, and the yield of the crops is increased. The soil conditioner has the advantages of simple preparation process, reduction of growth hindrance, optimization of soil aggregates, increase of pores, reduction of volume weight, improvement of ventilation, water permeability and water and fertilizer retention capabilities, substantial agricultural economy energization, substantial yield increase of crops, and wide application prospects.

The invention relates to the technical field of ecological restoration, in particular to a mine waste dump ecological restoration method which comprises the following steps: dividing a waste dump into planting areas, installing detection equipment in each planting area, and monitoring various indexes of soil and environment in real time; a soil conditioner is customized and produced according to soil physicochemical property analysis; arranging an irrigation system for each planting area, and planting grass seeds and shrubs according to climate and soil conditions; strip-shaped ditches are dug between the adjacent planting areas, and prefabricated buried ecological restoration modules are arranged in the strip-shaped ditches to form planting grooves. By implementing the ecological restoration scheme, the physical and chemical properties of the soil are remarkably improved, the heavy metal content is remarkably reduced and is lower than the national soil environment quality standard limit value, and soil pollution is effectively eliminated. In addition, the proportion of soil aggregate structures is increased from 15% to 30%, the water retention capacity of the soil is remarkably improved, and more suitable environmental conditions are provided for vegetation growth.

The invention relates to bacillus velezensis and application thereof in preparation of a water-soluble microbial agent, and belongs to the technical field of microorganisms. The bacillus velezensis has the effects of producing exopolysaccharides, promoting the formation of soil aggregates, degrading abamectin, hydrolyzing protein, producing indoleacetic acid, promoting the growth of tomato plants and promoting the enzyme activity of tomato rhizosphere soil enzyme. The fertilizer not only has the effects of improving the soil aggregate structure and promoting the growth of tomato plants, but also can accelerate the temperature rise of the abamectin fermentation waste residue compost, prolong the high-temperature period and shorten the compost period, and is beneficial to promoting the harmless treatment and resource utilization of the abamectin fermentation waste residue.

The invention discloses a functional microbial organic fertilizer for saline-alkali soil improvement and a preparation method and application thereof, and belongs to the technical field of fertilizers. In order to solve the technical problem that high salt ion content in saline-alkali soil causes multiple adverse effects on plant growth, the invention provides a functional microbial organic fertilizer for saline-alkali soil improvement. The functional microbial agent is prepared from bacillus amyloliquefaciens, insecticidal cupriavidus, trichoderma harzianum, halophilic bacillus grignard and halotolerant bacillus, and the functional microbial carrier organic fertilizer is added with furfural residues and citric acid residues. The functional microbial organic fertilizer provided by the invention has the functions of improving the microbial abundance of saline-alkali soil, improving the physicochemical properties of the soil, adjusting the pH value of the soil, increasing the proportion of soil aggregates and increasing the contents of rapidly available phosphorus and rapidly available potassium. The functional microbial organic fertilizer provided by the invention can be applied to effectively improving saline-alkali soil.

The invention provides a preparation method of calcium-modified ferrihydrite and application of the calcium-modified ferrihydrite in improvement of a soil structure, and belongs to the technical field of soil structure improvement. The preparation method of the modified ferrihydrite comprises the following steps: gradually adding a sodium hydroxide solution into a ferric trichloride solution, and stirring and mixing until the pH value of a suspension reaches neutral; aging the suspension at room temperature for 12 hours, centrifuging to remove supernate, and washing the synthesized ferrihydrite with pure water for 2-3 times; then adding a calcium chloride solution for salt washing for 2-3 times so as to fully replace sodium ions on the surface of ferrihydrite into calcium ions; and washing with pure water for 2-3 times to obtain the calcium modified ferrihydrite. The calcium modified ferrihydrite provided by the invention eliminates the influence of dispersive sodium ions or potassium ions in ferrihydrite synthesized by a traditional method, is a nanoscale weak crystalline mineral, has the effect of rapidly improving the stability of soil aggregates, can rapidly aggregate soil particles after being applied to soil, effectively enhances the structural stability of the soil, and improves the soil quality. Therefore, good materials and means can be provided for soil structure improvement.

The invention relates to the technical field of land treatment, in particular to an organic fertilizer for improving the soil fertility of a sand land. Comprising the following raw materials in parts by weight: 3-12 parts of a microbial agent, 20-50 parts of volcanic rock, 5-12 parts of an additive, 32-45 parts of sodium bentonite, 12-18 parts of a functional agent, 5-25 parts of a modifier and 15-32 parts of a water retention material. By increasing organic matters in the soil, the viscosity of the soil is improved, the air permeability, water retention and permeability of the soil are improved, the formation of a soil aggregate structure is promoted, and the water and fertilizer retention capability of the sand soil is improved.

The invention relates to the technical field of agricultural microorganisms, in particular to a microbial agent containing paenibacillus love KF-B6, a compound microbial fertilizer and application of the microbial agent and the compound microbial fertilizer. The KF-B6 Paenibacillus lovuenyuan as well as the microbial agent and the compound microbial fertilizer thereof provided by the invention can promote the formation of soil aggregates, improve soil organic matters, improve soil enzyme activity, effectively improve soil and increase the proportion of soil bacteria and fungi. Therefore, the method can be applied to prevention and treatment of apple continuous cropping obstacles, and the survival rate of field planting of apple seedling stocks and field planting of young trees in a rebuilt orchard is guaranteed. By applying the KF-B6 compound microbial fertilizer and the microbial agent, the survival rate of the M9T337 rootstock seedlings planted in the continuous cropping soil can be increased, the highest survival rate reaches 96.67%, and the seedling roots are high in activity and good in growth vigor. The survival rate of the Daphne red apple seedlings planted in the rebuilding of the continuous cropping obstacle old orchard is as high as 94.00%, and the effect of effectively preventing and controlling the apple continuous cropping obstacle is achieved.

The invention discloses a soil structure improver containing a compound microbial agent and a preparation method of the soil structure improver. The soil structure improver containing the compound microbial agent is prepared from the following raw materials in percentage by mass: humic acid, the compound microbial agent, vermiculite powder, a seaweed extract, diatomite, polydextrose, pectin, monopotassium phosphate, an organic zinc chelate, a medium trace element supplement and bentonite, wherein the humic acid, the compound microbial agent, the vermiculite powder, the seaweed extract, the diatomite, the polydextrose, the pectin, the monopotassium phosphate, the organic zinc chelate, the medium trace element supplement and the bentonite are matched. According to the soil structure improver disclosed by the invention, through the synergistic effect of the compound microbial agent, the proportion of a soil aggregate structure is effectively increased, the stability and the anti-scouring capability of soil are enhanced, the air permeability and the water-retaining property of the soil are improved, an ideal environment is created for the growth of crop roots, and the microbial agent can be colonized in the soil, so that the soil structure is improved. A good microbial community structure is formed, the biological diversity of the soil is enhanced, the self-repairing capability of the soil is improved, and a healthy soil ecological system can be constructed.

The invention belongs to the technical field of soil improvement, and discloses a preparation method of a humic acid biochar saline-alkali soil conditioner. The preparation method comprises the following steps: by taking waste edible fungus chaff as a raw material, activating the waste edible fungus chaff with a KOH solution, pyrolyzing the waste edible fungus chaff under a limited oxygen condition to obtain fungus chaff-based biochar with a porous structure, mixing the fungus chaff-based biochar with humic acid, a sodion replacement material (desulfurized gypsum powder and / or calcium chloride) and purified water according to a certain mass ratio, and drying and fixing at medium temperature to obtain the modifier. According to the modifier, the porous adsorption performance of the biochar, the pH adjustment and agglomeration improvement functions of the humic acid and the sodium ion replacement capacity of the calcium source material are comprehensively exerted, the sodium ion content in the saline-alkali soil is synergistically reduced, and the soil agglomeration structure and the water and fertilizer retention capacity are improved. The prepared modifier is especially suitable for soil treatment of moderate and severe saline-alkali soil in which the ratio of sodium ions to exchangeable cations exceeds 10%, and has agricultural waste resource utilization and ecological restoration values.

The invention provides an acid soil conditioner and a preparation method thereof, and belongs to the technical field of soil conditioners. The soil conditioner is prepared from the following raw materials in parts by weight: 30-40 parts of pH-sensitive hydrogel, 3-7 parts of slow-release nitrogen-fixing bacteria microcapsules, 5-8 parts of soil improvement bacteria, 10-20 parts of a chitosan / sodium alginate modified compound, 17-20 parts of fly ash and 18-22 parts of phosphogypsum. According to the prepared acid soil conditioner, the microorganism and chemical improvement effect is adopted, the pH value of soil can be obviously increased, the granular structure of the soil is improved, the buffering capacity of the soil is enhanced, the fertility of the soil is improved, the heavy metal content of the soil is reduced, the quality of the soil is improved, and the crop yield is increased, so that the acid soil conditioner has wide application prospects.

The invention belongs to the technical field of agricultural machinery, and particularly relates to a wheat harvesting and straw deep burying and returning all-in-one machine which comprises a harvesting and threshing part, a walking part, a smashing part, a feeding part and a deep soil turning part. Soil is scarified through the deep soil scarifying part, then the ground wheat straw is buried to the bottom of the scarified soil through the feeding part, deep burying and returning of the wheat straw are achieved, the deeply-buried straw is decomposed in deep soil, humus is more easily formed, the content of organic matter in the soil is increased, and the yield of the wheat straw is increased. Deep burying can promote the formation of a soil aggregate structure and enhance the permeability and water and fertilizer retention capability of deep soil, so that surface hardening possibly caused by conventional returning to the field is avoided; a series of working procedures of harvesting, threshing, smashing and deep burying are achieved through the walking component, and then the convenience and efficiency of straw returning to the field are improved.

The invention provides a method suitable for water retention of soil with different textures. In order to better perform size matching between the biochar and soil particles, particle size grading is performed on the biochar according to the size of soil aggregates, and three kinds of biochar with the particle size larger than 2.0 mm, the particle size ranging from 0.25 mm to 2.0 mm and the particle size smaller than 0.25 mm are obtained. The three kinds of biochar with different particle sizes are used in different types of soil respectively, and 5% of biochar with the particle size of 0.25-2.0 mm is selectively applied according to the water retention requirement of the arid area loam farmland; according to the drainage requirements of loam waterlogging areas with more rainfall, 5% of biochar with the particle size larger than 2.0 mm is selectively applied; and 5% of biochar with the particle size smaller than 0.25 mm is selectively applied for water and soil conservation of sandy soil in the arid region. By scientifically regulating and controlling the particle size and the application amount of the biochar, the biochar is matched with the specific properties of the soil, so that the water retention capacity of the soil is improved, and the soil efficiency is improved.

The invention aims to provide a soil aggregate solid-phase characteristic detection method and device based on deep learning. The method comprises the following steps: acquiring a soil aggregate sample image; segmenting the soil aggregate sample image by adopting a soil aggregate segmentation model to obtain a mask image of each aggregate shape; and according to the mask image, calculating by using opencv to obtain the solid-phase characteristics of the soil aggregate. The method comprises the following steps: performing image acquisition on a to-be-detected soil aggregate sample, and calculating to obtain the solid-phase characteristic of the to-be-detected soil aggregate sample through a deep learning-based soil aggregate solid-phase characteristic detection model; the detection process is simple, and the method has the characteristics of high detection efficiency and high detection precision.

The invention provides a microbial agent type bio-organic fertilizer capable of improving continuous cropping tobacco planting soil hardening and a preparation method of the microbial agent type bio-organic fertilizer, and belongs to the technical field of organic fertilizers. The microbial agent type bio-organic fertilizer capable of improving continuous cropping tobacco planting soil hardening comprises the following raw materials: an organic material, a microbial agent, an inorganic nutritional ingredient, vinasse and an additive, wherein the organic material is composed of livestock and poultry manure, crop straw, tobacco waste and a fermentation inoculant; the additive is prepared from humic acid, seaweed extract and amino acid. The organic fertilizer contains rich organic materials and humic acid, the content of organic matters in soil can be increased, the granular structure of the soil can be improved, the growth of soil-borne pathogenic bacteria can be inhibited by the added multiple beneficial microorganisms, the micro-ecological environment of the soil can be improved by the photosynthetic bacteria, and the incidence rate of diseases such as tobacco black shank and bacterial wilt can be reduced.

The invention provides a slow-release fertilizer for saline-alkali soil and a preparation method thereof, and the slow-release fertilizer comprises a granular core which is formed by co-granulation of a basic fertilizer composition and charcoal powder; the first coating layer is formed on the surface of the granular core by a mixture consisting of gamma-polyglutamic acid or a derivative thereof and sodium alginate; the second coating layer is formed on the surface of the first coating layer by sulfur; and the third coating layer is formed on the surface of the second coating layer by an anti-blocking agent. The slow-release fertilizer for the saline-alkali soil is strong in functionality and good in slow-release effect, improves the granular structure of soil, improves the utilization rate of water and fertilizer, synergistically reduces the pH of the saline-alkali soil, increases the content of nutrients and organic matters in the soil, promotes the growth and development of plants, and improves the micro-ecology of the soil.

A functional microbial organic fertilizer for improving saline-alkali land, and its preparation method and application, belong to the field of fertilizer technology. In order to solve the technical problem that the high salt ion content in saline-alkali soil has multiple adverse effects on plant growth, the present invention provides a functional microbial organic fertilizer for improving saline-alkali land, which is prepared by a functional microbial agent prepared from Bacillus amyloliquefaciens, Copperbacterium insecticide, Trichoderma harzianum, Halobacterium gesneri and Bacillus halogenide, and a functional microbial carrier organic fertilizer added with furfural residue and citric acid residue. The functional microbial organic fertilizer provided has the functions of increasing the abundance of saline-alkali soil microorganisms, improving soil physical and chemical properties, regulating soil pH, increasing the proportion of soil aggregates, and increasing the content of available phosphorus and available potassium. The functional microbial organic fertilizer provided by the present invention can be used to effectively improve saline-alkali soil.

The invention relates to the technical field of soil improvement, and discloses a straw-returning soil-improving yield-increasing method for saline-alkali soil cotton planting, comprising the following steps: S1, collecting soil to obtain a saline-alkali soil sample; s2, determining the straw returning amount, and setting different returning amount standards such as non-returning of cotton straws, half-amount returning of the straws and full-amount returning of the straws in a cotton producing area of the coastal saline-alkali land by referring to local soil conditions and cotton planting conditions; s3, in combination with deep scarification treatment, performing deep scarification and non-deep scarification comparison treatment on the basis of different straw returning amounts; and S4, monitoring the physical and chemical properties of the soil. After the straws are returned to the field, as time goes on, the straws are gradually decomposed, abundant organic substances are added to the soil, the organic substances are beneficial to formation and stabilization of soil aggregates, so that the pore structure of the soil is improved, the soil becomes looser, the air permeability and the water permeability are remarkably improved, and the soil quality is improved. And a good soil environment is created for growth and respiration of cotton roots.

The invention provides a temperature-increasing oxygen-increasing agent for waterlogging type medium and low yield fields and a preparation method of the temperature-increasing oxygen-increasing agent. The temperature-increasing oxygen-increasing agent is prepared from the following raw materials in parts by weight: 80 to 130 parts of tea seed cakes, 80 to 110 parts of aged chicken manure, 140 to 180 parts of straw powder, 7.7 to 10 parts of beneficial bacteria, 0.3 to 0.8 part of alginate oligosaccharide, 9.5 to 12 parts of silicon-calcium-magnesium ore powder, 200 to 220 parts of activated humic acid and 340 to 430 parts of calcium peroxide. The fertilizer has comprehensive nutrients, can effectively improve the utilization rate of the fertilizer, improve the soil structure and promote production and income increase, takes organic matters as a carrier, is added with a large amount of activated humic acid and silico-calcium-magnesium ore powder, has strong chelating ability, promotes the formation of soil aggregates and improves the absorption and utilization rate of plant nutrients, and has good application prospects through a unique coating technology. The active ingredients and the granulation rate of the product are effectively improved.

The invention relates to the field of planting soil, and discloses modified marine facies sludge-based planting soil and a preparation method thereof.The modified marine facies sludge-based planting soil is prepared by compounding marine facies sludge and a modifier according to the mass ratio of 5: 0.4-1; the modifier comprises an adsorption additive, modified polyvinyl alcohol fiber, fly ash, potassium fulvate, desulfurized gypsum and an organic fertilizer; the adsorption additive is prepared by taking straw cellulose and sodium alginate as a network framework and taking expanded vermiculite as an adsorption function unit through a metal ion cross-linking method; the modified polyvinyl alcohol fiber is prepared by oxidizing polyvinyl alcohol fiber with potassium persulfate and silver nitrate, reacting with triethylene tetramine and hydrochloric acid to generate ammonium salinized polyvinyl alcohol fiber, and further reacting with calcium bentonite acidified by hydrochloric acid. Wherein the adsorption additive and the modified polyvinyl alcohol fiber are added, so that the adsorption performance of the planting soil and the stability of soil aggregate are improved.

The invention discloses a soil organic matter content nondestructive testing method and device based on spectral analysis, and relates to the technical field of soil detection. The detection device comprises a placing rack, a freeze-drying device and a detection device, wherein the placing rack is internally provided with the freeze-drying device; the sampling assembly is used for sampling a soil sample and is mounted in the placement frame. Through the arrangement of the freeze-drying device and the detection assembly, and through freeze-drying layered falling and three-dimensional data guide detection, the detection assembly directly performs spectrum detection on soil in an original state, so that the damage of traditional chemical extraction or mechanical grinding to a soil aggregate structure and the compaction of the soil during sampling are avoided; the original pore structure and density of soil in a detection area are kept to the maximum extent, the authenticity of spectral signals is ensured, nondestructive detection is achieved, meanwhile, the reliability of collected data can be effectively ensured for multi-angle spectral collection of detection points, and errors possibly caused by single-angle detection are eliminated.

The invention relates to a compound microorganism saline-alkali soil conditioner as well as a preparation method and application thereof, and relates to the technical field of saline-alkali soil improvement. The compound microorganism saline-alkali soil conditioner is prepared from the following raw materials: a tailing-based organic matter compound, a microorganism compound bacterium agent and ammonium sulfate, the tailing-based organic matter compound is prepared from the following raw materials: iron tailings and wormcast organic fertilizer; the raw materials of the microbial complex microbial inoculant comprise rhizosphere kocuria and bacillus subtilis. The compound microorganism saline-alkali soil conditioner is prepared from the tailing-based organic matter compound, the microorganism compound bacterium agent and ammonium sulfate, the pH value of saline-alkali soil can be reduced, the saline-alkali degree of the saline-alkali soil can be reduced, through the cementation effect of microorganisms, organic fertilizer and mineral particles, soil aggregates are increased, the soil structure is improved, and the soil quality is improved. The hardening state of the saline-alkali soil is improved, the water and fertilizer retention capacity is improved, and the soil ecological environment is greatly improved.

The invention relates to the technical field of microbial fertilizers, in particular to a low-cost compound microbial fertilizer and a preparation method thereof. The low-cost compound microbial fertilizer comprises the following raw materials in parts by mass: 20-40 parts of a fermented organic fertilizer, 10-20 parts of urea, 5-10 parts of ammonium magnesium phosphate, 5-15 parts of a potassium fertilizer, 1-4 parts of sodium humate, 1-4 parts of trehalose, 1-3 parts of gelatin, 0.1-1 part of a stabilizer, 7-19 parts of a mineralized microbial agent load and 1-3 parts of a coating solution, the mineralized microbial inoculum load comprises the following raw materials: 5-15 parts of bamboo charcoal powder, 1-3 parts of a composite microbial inoculum, 1-2 parts of calcium chloride and 1-2 parts of disodium hydrogen phosphate. The fertilizer has the advantages of obviously increasing the fertilizer utilization rate, improving the physical and chemical properties of soil, promoting the formation of granular structures and repairing hardened and ill-conditioned soil, has obvious soil repairing effect and obvious yield increasing, value increasing and quality improving effects, and is suggested to be suitable for large-scale popularization and application when being popularized and applied in production.

The invention provides a method for inhibiting soil acidification and application of protozoa to preparation of biological fertilizer.The method comprises the step that the biological fertilizer containing the protozoa is inoculated into soil, and the protozoa comprises at least one of kidney-shaped worms and ochramydae. By the adoption of the technical scheme, the purpose of rapidly inhibiting soil acidification is achieved, the increase of the organic carbon content of soil can be remarkably promoted, meanwhile, different types of protozoa have different degrees of effects on key nutrient elements such as solid storage nitrogen and phosphorus, and a soil nutrient supply structure is optimized. In the aspect of improving the physical structure of the soil, the life activity of the protozoa can effectively promote the generation of soil aggregates, and the healthy soil structure is remodeled by improving the porosity and air permeability of the soil. In addition, the protozoa can also form a complex interaction network with microorganisms such as bacteria and fungi in soil, so that a microbial metabolic pathway is activated, and the microbial activity is remarkably improved.

The invention belongs to the technical field of soil remediation, and provides a preparation method of a saline-alkali soil remediation agent aiming at the problem of insufficient long-acting stability caused by uncontrollable Ca < 2 + > release of an existing saline-alkali soil remediation agent. The method comprises the following steps: by taking alfalfa residues as raw materials, fermenting to generate acidic fermentation liquor, dissolving soil carbonate, reducing pH, triggering coordinate bond dissociation of chelated calcium gel, realizing pH responsiveness of releasing Ca < 2 + >, and releasing Ca < 2 + > to replace Na < + >; meanwhile, quinonyl on the surface of the modified biochar is used for activating extracellular electron transfer of the Prussella adamsii, and hydroxyl ion secretion is promoted to neutralize salt groups; the alfalfa humification fermentation material and exopolysaccharides secreted by flora are crosslinked through hydrogen bonds to form a cementation layer, soil aggregates are stabilized through a modified charcoal pore framework, calcium slow release balance is regulated and controlled, the problem of local hardening caused by sudden release of Ca < 2 + > is cooperatively solved, and long-acting repair and improvement of the saline-alkali soil are achieved.

The invention provides a slope ecological greening construction method based on soil improvement and a monitoring system, and is suitable for the technical field of slope greening construction. The method comprises the steps of plant-fungus combination selection, slope protection structure construction, hypha system construction, unmanned aerial vehicle sowing, earth surface film mulching and dynamic maintenance regulation and control. A mycorrhizal network is constructed by taking arbuscular mycorrhizal fungi and ectomycorrhizal fungi as cores, a mycelium fiber network is formed, and the soil fixation capability is enhanced by the cohesive force between the fiber network and soil and the strength of fibers; the stability of soil aggregates is improved through glomalin secreted by hyphae, and the corrosion resistance of the soil is further improved; a water-retaining agent is added, so that the water-retaining property of the backfill soil is improved while early-stage growth of green vegetation and a hypha network is guaranteed; finally, the unmanned aerial vehicle carries a multispectral camera and a radar for cooperative scanning, rapidly and accurately monitors the soil moisture content, sets a soil moisture content warning value, reminds maintenance personnel to irrigate and maintains long-term survival of vegetation.

The invention relates to the technical field of flower soil, and particularly discloses a Chinese rose nutrient soil formula and a processing method thereof. The Chinese rose nutrient soil formula comprises humus soil, sandy soil, seaweed-peat soil, organic substances, perlite, river sand, bone meal, ammonium sulfate, monopotassium phosphate and a microbial agent. The seaweed is added into the peat soil, the water retention and fertilizer retention performance of the nutrient soil can be further improved, a continuous nutrient source can be provided for the China rose, and meanwhile, the peat soil has the effect of adjusting the soil pH value, and nutrient absorption of the China rose is facilitated. In addition, by increasing the number and activity of beneficial microorganisms in the soil, ecological balance of the soil is kept, and formation of a soil aggregate structure is promoted.

The invention belongs to the technical field of agricultural fertilizers, and discloses a preparation process and application of a medical stone double-effect organic fertilizer with soil improving and growth promoting functions, the medical stone double-effect organic fertilizer comprises the following components by weight: 20-40 parts of activated medical stone powder with a particle size of less than or equal to 0.1 mm, and activated by a citric acid solution; the decomposed organic material is prepared by mixing livestock and poultry manure and crop straw according to the mass ratio of 2: 1-4: 1 and performing aerobic composting fermentation through a compound microbial agent, and the water content is smaller than or equal to 30%; the microbial agent contains phosphate solubilizing bacteria, nitrogen-fixing bacteria and rhizosphere growth-promoting bacteria, and the effective viable count is greater than or equal to 2 * 10 CFU / g; the auxiliary material comprises bentonite, a polyacrylamide water-retaining agent and a pH (Potential of Hydrogen) regulator, and the proportion of the bentonite is greater than or equal to 30 percent. The adsorption-desorption performance of the medical stone is enhanced by activating the medical stone through citric acid, and a synergistic system of water retention, fertilizer supply and growth promotion is formed by combining decomposed organic materials and functional microorganisms. According to the fertilizer, the stability of a soil aggregate structure can be remarkably improved (increased by 15-20%), the yield increasing rate of crops reaches 20-30%, and 30% of chemical fertilizer dosage is reduced. The method is suitable for acid soil remediation, continuous cropping obstacle treatment and economic crop planting.

The invention belongs to the technical field of soil remediation, and discloses a microalgae biological soil remediation agent and application thereof. A sustainable benign underground micro-ecosystem is constructed, the prepared microalgae biological soil remediation agent takes a porous active carrier with positive charges as a matrix, the porous active carrier is a porous carrier obtained by compounding silicon dioxide on montmorillonite, and the porous carrier is modified to obtain an aminated porous carrier with negative charge NH2-groups between layers. And finally, chitosan cations loaded on the carrier become a porous active carrier with positive charges, and the carrier is loaded with a large amount of chlorella pyrenoidosa, so that the environmental sensitivity is reduced, the carrier can survive and breed in a harsh soil environment, the soil fertility can be remarkably improved, and the yield and quality of crops are improved. Meanwhile, the effect of reducing soil heavy metal pollution is also achieved; the microbial community diversity of the soil can be increased, the soil aggregate structure is improved, and the physical and chemical environment of the soil is improved.

The present invention discloses a method for improving black soil by applying a manure fertilizer in a furrow combined with returning straw to the field. The method comprises the following steps: returning straw to the field: after harvesting the previous crop, crushing the previous crop straw and returning it to the field; preparing a composite inoculant: inoculating psychrophilic bacteria, cellulolytic bacteria, and anaerobic bacteria into LB culture medium to form a bacterial solution, diluting the bacterial solution 20-100 times, mixing them in a volume ratio of (1-2):(1-2):(1-2), and adding auxiliary materials to prepare a composite inoculant; applying the composite inoculant into the 0-15 cm soil layer through shallow furrows along the planting rows at a dosage of 100-150 kg / mu; and sowing seedling strips in alternate years. The method of the present invention can significantly increase the organic matter content of black soil, improve soil aggregate structure, reduce the salinity of the plow layer, and achieve rapid soil fertilization and stable crop yield and efficiency.

The invention relates to the technical field of soil conditioning, and provides a granular soil conditioner and a preparation method thereof. Comprising the following components in percentage by weight: 7%-11% of potassium monosilicate, 12%-16% of calcium monosilicate, 1.5%-2.5% of metarhizium anisopliae, 2.5%-3.5% of bacillus amyloliquefaciens, 18%-22% of humic acid, 6%-8% of a seaweed extract, 3%-5% of lignosulfonate, 10%-15% of charcoal and 8%-12% of zeolite powder. The granular soil conditioner contains potassium monosilicate, calcium monosilicate and other components, provides silicon for soil, after use, the soil is loose, crop root systems are developed, humic acid improves soil fertility and water and fertilizer retention capacity, charcoal and zeolite powder improve soil breathability and water retention, formation of a soil aggregate structure is promoted, and the soil conditioner has the advantages of being good in soil conditioning effect and good in soil conditioning effect. Metarhizium anisopliae and bacillus amyloliquefaciens can inhibit harmful pathogenic bacteria in soil, improve the microbial community structure of the soil and improve the biological activity of the soil, most of the raw materials are natural sources, dependence on chemical synthesis raw materials is reduced, and pollution to the environment is reduced.