534 results about "Soil conditioner" patented technology

The invention discloses a potassium fulvate chelated macroelement water-soluble fertilizer with stress resistance and growth promotion functions, and relates to the technical field of water-soluble fertilizers, the potassium fulvate chelated macroelement water-soluble fertilizer comprises the following raw materials by weight: 167-210 parts of mineral source potassium fulvate, 450-460 parts of potassium nitrate, 300-310 parts of urea, 150-160 parts of potassium dihydrogen phosphate, 30-40 parts of potassium sulfate, 15-25 parts of EDTA-disodium, and 5-15 parts of citric acid. 0.5 to 1.5 parts of brassinolide and 4 to 6 parts of polyaspartic acid; according to the potassium fulvate chelated macroelement water-soluble fertilizer with the stress-resistant and growth-promoting functions, through chelation cooperation of potassium fulvate and nitrogen, phosphorus and potassium, the solubility of the chelated phosphorus element in water is increased, and the chelated phosphorus element can be more uniformly distributed in soil; by adopting an EDTA-disodium and citric acid composite chelating system, volatilization and loss of nitrogen elements are reduced, the problem of precipitation of calcium, magnesium and phosphorus is solved, and the soil conditioner is suitable for hard water areas and especially has outstanding performance in saline-alkali soil and arid areas.

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 relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention discloses a seed coating containing an arbuscular mycorrhizal inoculant. The seed coating is prepared from the following components in parts by weight: 25 to 35 parts of the arbuscular mycorrhizal inoculant, 35 to 45 parts of a soil conditioner, 15 to 20 parts of talcum powder and 15 to 20 parts of polyvinyl acetate. The invention further provides a preparation method of the seed coating containing the arbuscular mycorrhizal inoculant and application of the seed coating to reduction of soil heavy metal pollution, increase of disease resistance and stress resistance of crops and promotion of crop growth. The seed coating containing the arbuscular mycorrhizal inoculant wraps the surfaces of plant seeds, provides good nutritional ingredients for growth and development of the seeds, and is beneficial to improving the germination rate of the seeds under heavy metal cadmium stress, reducing soil heavy metal cadmium pollution, improving soil quality, increasing soil fertility and improving disease resistance and stress resistance of crops; growth of seedlings is promoted, and crop quality and yield are improved.

The invention discloses an abandoned mining area vegetation recovery method based on a community succession law, and belongs to the field of abandoned mining area vegetation recovery. Comprising the steps of initial environment data intelligent collection and soil stress evaluation, succession pioneer community big data intelligent screening and matching, multilevel planting scheme optimization based on a self-adaptive genetic algorithm, intelligent soil improvement agent directional putting and whole-process dynamic monitoring and self-adaptive feedback regulation and control. Multi-dimensional environment data are obtained through means such as remote sensing and a sensing network, local dominant species are recommended and configured in a partitioned and staged mode by applying intelligent models such as multi-factor stress clustering, collaborative interaction succession adaptation and a genetic algorithm, and soil microorganism interaction is combined to optimize recovery measures. Vegetation and soil evolution is monitored in real time, dynamic adjustment and optimal succession driving are achieved, and scientificity, efficiency and sustainability of ecological restoration of the abandoned mining area are effectively improved.

The invention relates to the technical field of soil amendments, in particular to a soil amendment containing earthworm enzymatic hydrolysate and a preparation method of the soil amendment. The soil conditioner containing the earthworm enzymatic hydrolysate comprises the following components: earthworm enzymatic hydrolysate microcapsules and adjuvant particles in a mass ratio of (2-4): 1, the earthworm enzymatic hydrolysate is prepared by performing enzymolysis on fresh earthworm homogenate by compound enzyme, and the compound enzyme comprises cellulase and protease; the wall material of the earthworm enzymatic hydrolysate microcapsule comprises at least one of chitosan, calcium alginate, gelatin and Arabic gum; the auxiliary agent comprises humic acid and inorganic natural minerals. According to the soil conditioner containing the earthworm enzymatic hydrolysate, the earthworm enzymatic hydrolysate is wrapped by the microcapsules, the retention rate of active ingredients in the earthworm enzymatic hydrolysate can be remarkably increased, and the soil condition can be further improved by matching with humic acid and inorganic natural minerals for use.

The invention discloses a biochar-based microbial soil conditioner and a preparation method thereof, and relates to the technical field of soil improvement. The preparation method comprises the following steps: firstly, carrying out alkali-acid treatment and segmented pyrolysis on raw materials such as wood chips to obtain primary biochar, and then carrying out chemical activation, nano material modification and plasma treatment to obtain the composite modified biochar. Meanwhile, probiotics such as bacillus subtilis and the like are subjected to activation, expanding culture and saline-alkali domestication to obtain directional domestication bacterial liquid, and the directional domestication bacterial liquid is solidified into microspheres by adopting a composite embedding carrier. And finally, mixing the composite modified biochar, the composite embedded microspheres, potassium humate and other auxiliary materials, drying, and sieving to obtain the soil conditioner. The soil conditioner disclosed by the invention can realize an improvement effect on saline-alkali soil and reduce the total salt content; meanwhile, directionally domesticated microorganisms secrete organic acid to neutralize alkaline components, the pH of the soil is adjusted to the range suitable for crop growth, and salt and alkali stress is relieved.

The invention discloses an organic-inorganic composite acid soil conditioner with synergism of nitrogen element synergism and soil expansion and application, and belongs to the technical field of soil conditioners. The modifier prepared by the invention is prepared from an acid neutralizer, a structure modifier, a capacity expansion synergist and a nitrogen synergist and is prepared from the following components in parts by weight: 18 to 22 parts of dolomite powder, 6 to 10 parts of lime powder, 20 to 24 parts of oyster shell powder, 8 to 12 parts of humic acid, 4 to 8 parts of sargassum, 1 to 3 parts of sodium alginate, 7 to 11 parts of charcoal, 5 to 9 parts of sepiolite powder, 3 to 7 parts of bentonite, 6 to 10 parts of poly gamma-calcium glutamate and 3 to 7 parts of chitosan. The soil conditioner can regulate and control the soil acidity, buffer the soil capacity, improve the soil structure and balance soil nutrients, solves the problems of high re-acidification rate, soil hardening and nutrient imbalance of a traditional lime conditioner, and is suitable for pHlt; and 6.5, repairing the acid soil.

The application discloses a soil modifier for saline-alkali soil based on biochar and application, and belongs to the technical field of saline-alkali soil improvement. The soil modifier is composed of the following components in parts by weight: 40-45 parts of saline-alkali improvement biochar, 18-20 parts of mature organic fertilizer, 4-5 parts of water-retaining agent and 4-5 parts of saline-alkali resistant microbial gel beads; the saline-alkali improvement biochar is prepared from biochar material through pyrolysis, nano solution soaking and composite enzyme solution crosslinking; and the saline-alkali resistant microbial gel beads are prepared by mixing microbial liquid and embedding liquid and then dropping into a calcium chloride solution. The soil modifier prepared by the application has a remarkable effect on soil salt removal and soil pH value improvement, and can be applied in secondary saline-alkali soil in irrigated agricultural areas.

The invention discloses a microbial soil conditioner and a preparation method thereof, and relates to the technical field of soil improvement. The method comprises the following steps: culturing heavy metal-resistant chlorella and aspergillus niger to obtain a mixed bacterial suspension, combining the mixed bacterial suspension with a composite chelating modifier prepared by reacting chitosan quaternary ammonium salt, ethylenediamine tetraacetic acid and epichlorohydrin, carrying out crosslinking by using genipin to obtain a functional microbial agent, and carrying out pyrolysis and acid oxidation on corn straws as a raw material to obtain the heavy metal-resistant chlorella modified functional microbial agent. The preparation method comprises the following steps: preparing a nano zero-valent iron-biochar composite material, reducing and loading ferrous ions through sodium borohydride, preparing the nano zero-valent iron-biochar composite material, mixing the nano zero-valent iron-biochar composite material with zeolite, bentonite and a silane coupling agent, carrying out spray drying to prepare a porous carrier substance, and finally stirring and mixing an organic fertilizer complex microbial inoculant, the functional microbial inoculant and the carrier substance, and aging to prepare the soil conditioner. The prepared conditioner has a good remediation effect on soil heavy metal pollution.

The invention relates to the technical field of improvement of coastal saline-alkali land, in particular to a soil conditioner for salt-control fertile soil of coastal fishery reclamation saline-alkali land and a preparation method of the soil conditioner. The invention relates to a soil conditioner for salt-control fertile soil of coastal fishery receding reclamation saline-alkali land. The soil conditioner comprises the following raw material components in parts by mass: 40-60 parts of urea, 25-45 parts of calcium superphosphate, 30-45 parts of potassium sulfate, 20-25 parts of modified oyster shell powder, 10-15 parts of humic acid, 3-5 parts of a compound microbial agent, 10-20 parts of desulfurized gypsum and 25-35 parts of a biochar composite material, the biochar composite material is prepared from the following raw material components in parts by mass: 1 to 2 parts of sodium alginate, 1 to 2 parts of chitosan, 3 to 8 parts of biochar, 1 to 5 parts of calcium chloride, 10 to 20 parts of tuff stone powder, 0.25 to 2 parts of acidified attapulgite, 0.01 to 0.08 part of graphene oxide, 1 to 5 parts of ferric nitrate, 0.6 to 3 parts of copper nitrate and 0.1 to 0.5 part of silane coupling agent. By adopting the soil conditioner prepared by the invention, the pH value of soil, the volume weight of the soil and the total amount of water-soluble salts can be remarkably reduced, meanwhile, the organic matters of the soil are increased, and the porosity of the soil is increased.

The invention relates to the technical field of soil improvement and ecological restoration, and discloses an ultra-stable mineralization in-situ salt fixation method for improvement of saline-alkali soil in an arid region and application of the ultra-stable mineralization in-situ salt fixation method. The invention provides a method for improving northwest inland saline-alkali soil based on combination of an ultra-stable mineralized in-situ salt-fixing soil conditioner, precise partitioning, biological improvement and salt-tolerant plant planting. According to the method, a salt elimination foundation is created through physical soil preparation, firstly, the soil alkalization degree and the salt content are rapidly reduced through an ultra-stable mineralization in-situ salt fixation soil conditioner, the physical structure of the soil is improved, and then rapid salt elimination and alkali inhibition, fertility cultivation and ecological reconstruction of the saline-alkali soil are finally achieved by constructing different plant planting modes and establishing a stable vegetation system. And a sustainable saline-alkali soil comprehensive treatment mode with good effect and low cost is formed.

The invention belongs to the technical field of soil amendments, and particularly relates to a saline-alkali soil biological-mineral composite amendment prepared from industrial waste and a preparation method thereof. Alkali fusion activated steel slag provides a quick-acting active calcium source, hydrothermal modification neutralized red mud forms hydrated aluminosilicate gel solid sodium, modified biochar enhances cation exchange capacity, a composite functional bacterial agent drives MICP biomineralization reaction, a quick-acting-slow-release-storage three-stage gradient improvement system is established, and the quick-acting-slow-release-storage three-stage gradient improvement effect is achieved. According to the present invention, the effects of 0-50 cm soil profile full-layer improvement and 12-24 month continuous improvement are achieved, 90 d after the modifier is applied, the soil pH value of the severe saline-alkali soil is reduced to 7.8 from 10.1, the conductivity is reduced to 3.2 dS / m from 11.5 dS / m, the sodium adsorption ratio is reduced to 11 from 42, the crop yield increase amplitude reaches 40-60%, 15-25 kg of the modifier is fixed per ton, and the industrial waste resource utilization rate gt is achieved; 90%.

The invention relates to the field of soil conditioners, and particularly discloses a soil conditioner for cultivated land with severe saline-alkaline obstacles as well as a preparation method and application of the soil conditioner. The invention relates to a soil conditioner for cultivated land with severe saline-alkaline obstacles. The soil conditioner comprises the following components: 25-35 parts of zeolite; 10 to 15 parts of diatomite; 15 to 20 parts of humic acid; 10 to 15 parts of biochar; 2-3 parts of a straw acid extract; 1 to 2 parts of anionic polyacrylamide; 1 to 2 parts of carboxymethyl cellulose; the biochar comprises conventional biochar, pyrolytic biochar and phosphogypsum modified biochar; the straw acid extract is prepared from acetic acid and straw. The application amount of the composition is 200-250 kg / mu, the situation that most of the soil of the coastal saline-alkali obstacle cultivated land is sticky can be relieved, the water permeability is improved, vertical leaching of salt is promoted, organic matter content is supplemented and captured for the soil, the buffering capacity of the soil is improved, and the soil condition of the coastal saline-alkali obstacle cultivated land is effectively improved.

The invention discloses a calcium-enriched rice straw biochar core-shell particle soil conditioner, which belongs to the technical field of soil improvement and farmland water environment governance, and comprises the following components: a calcium-enriched rice straw biochar core, desulfurized gypsum, a binder and a functional auxiliary agent, the binder is selected from one or more of starch, lignosulfonate, sodium carboxymethyl cellulose and sodium alginate; the functional additive is selected from one or more of humic acid, trace element fertilizer and organic fertilizer; through the comprehensive design on the material structure, the Ca < 2 + > slow release mechanism and the application system, calcium and sodium replacement and soil salinity and alkalinity reduction, flocculation and sedimentation of soil colloid in an alkaline environment, blocking and weakening of a soil-water interface colloid pollution channel and continuous improvement of the soil structure and fertility are synergistically realized.

The invention provides an application of a nitrification inhibitor and biochar as a soil conditioner in enhancing drought resistance of plants, a preparation method of the biochar is as follows: moso bamboo stalks are taken as raw materials, pyrolysis is performed for 4-8 hours under an anoxic state of 250-400 DEG C, soil is red soil, and the plant is polygonatum cyrtonema, and an application method comprises the following steps: adding a nitrogen fertilizer into the soil, the addition amount of the nitrification inhibitor is 1% of the content of nitrogen added to the soil, and the addition amount of the biochar is 3% of the mass of the soil. Through combined application of the biochar and the dicyandiamide, the drought resistance of the polygonatum cyrtonema and the benefits of soil microbial communities are remarkably improved.

This utility model relates to the field of material mixing equipment technology, and discloses a precise proportioning and mixing device for soil conditioner raw materials. The inner wall of the mixing tank is provided with a mixing chamber, and the inner wall of the mixing chamber is symmetrically rotatably connected to a mixing shaft. This utility model improves the proportioning accuracy of materials by providing a dispersion chamber on the inner wall of the mixing tank and using the dispersion chamber to disperse the materials before mixing. The mixing shaft drives the rotation of the transmission gear, which in turn drives the transmission belt to rotate. Then, the transmission gear drives the turntable and push rod to perform circular motion. Next, the cross sliding plate and the sliding frame achieve reciprocating sliding through the circular motion of the push rod. The meshing of the gear and the rack enables the worm gear to drive the rotation of the worm wheel. Finally, the worm wheel drives the dispersion screw to rotate and disperse the materials. Through the reciprocating rotation and sliding motion, the dispersion screw effectively disperses the materials evenly on the inner wall of the mixing chamber for mixing.

The application discloses a preparation device and method of a coal gangue soil conditioner, relates to the field of tailing utilization of solid waste utilization, and comprises a supporting assembly, the supporting assembly comprises an operation table, a wind screen assembly is arranged on the top of the operation table, and a mixing assembly and a fermentation assembly are arranged on the outer side of the operation table; when the application is used, a driving motor is started, the output shaft of the driving motor is rotated, the double-shaft gear is engaged to drive the driven gear ring to rotate, the coal gangue raw materials in the ball mill barrel are continuously rotated to be ground into powder, the ground coal gangue is discharged from the feeding port and then conveyed into the inside of the wind screen chamber, the coal gangue powder is conveyed downwards along the inclined discharging slide plate to the area close to the feeding pipeline, an air blower is started, the airflow generated by the air blower blows the coal powder particles forward, the coal powder particles pass through the screen and enter the inside of the feeding pipeline, and the remaining materials can be taken out by opening the sealing plate, so that separation is realized.

The invention belongs to the technical field of saline-alkali soil improvement, and particularly relates to a coastal saline-alkali soil-oriented intelligent pH-responsive controlled-release crop growth-promoting soil conditioner as well as a preparation method and application thereof. The modifier is biochar-based composite microspheres, an inner core is formed by compounding biochar, silicon quantum dots and a nitrogen-phosphorus-potassium compound fertilizer, an outer layer is coated with a pH response coating formed by chitosan, and an integrated system of environmental perception, release regulation and accurate fertilizer supply is constructed. After the fertilizer is applied to soil, a coating layer swells under the rhizosphere micro-domain acidic condition, nutrient diffusion is intelligently regulated and controlled, and leaching loss and volatilization are reduced. The biochar porous structure adsorbs and fixes salt ions, improves aggregate and ventilation and water permeability, and enhances water retention and fertilizer conservation; the silicon quantum dots improve the photosynthetic efficiency and enhance the oxidation resistance; the compound fertilizer is continuously supplied to nitrogen, phosphorus and potassium. The components synergistically improve soil microstructure and water and salt migration, relieve salt ion poison, improve nutrient utilization and crop salt tolerance, promote yield increase and stability and are suitable for saline-alkali soil remediation.

This invention relates to a method for efficiently spraying soil conditioner to treat saline-alkali land using composite microorganisms, belonging to the field of soil improvement technology. The method involves screening salt-tolerant functional microbial strains to prepare a composite microbial agent, which is then mixed with carrier materials such as diatomaceous earth, soybean meal, yeast metabolites, and well-rotted farmyard manure in a specific ratio to form a conditioner for application. The conditioner is applied using a two-stage spraying method, combined with deep tillage pretreatment and controlled temperature and humidity conditions, significantly improving microbial activity and soil condition uniformity. Experimental data show that after applying this method, the soil pH value decreased to 7.3-7.5, the salt content decreased to 0.1%-0.2%, and the organic matter content increased to 18-22 g / kg, achieving efficient ecological restoration and sustainable utilization of saline-alkali land.

The invention discloses a planting method for increasing the carbon sink capacity of a saline-alkali soil ecological system and application. A planting method for increasing the carbon sequestration capacity of a saline-alkali soil ecosystem adopts an agriculture and forestry composite planting mode, ricinus communis is planted in a forest land, the carbon sequestration capacity of the saline-alkali soil ecosystem is increased by matching a fertilizer and a soil conditioner, the fertilizer comprises a compound fertilizer, the nitrogen content of the compound fertilizer is 15-18%, the phosphorus content of the compound fertilizer is 15-18%, the potassium content of the compound fertilizer is 15-18%, the application amount of the compound fertilizer is 417-450 kg.ha <-1 >, and the application amount of the compound fertilizer is 20-30 kg.ha <-1 >. The soil conditioner comprises coal cinder charcoal or rice husk charcoal. According to the planting method, the soil carbon reserve can be increased, and the plant carbon sequestration amount and the ecological system carbon sequestration total amount are remarkably increased. A research result provides a theoretical basis for ecological restoration and sustainable utilization of the coastal saline-alkali soil, and shows that the aims of reducing saline-alkali obstacles and fixing carbon and increasing sink can be synchronously achieved through coupled application of biological measures and a soil improvement technology, and the method has important ecological practical value.

The invention discloses a method for preparing a soil conditioner for gardenia cultivation by using immobilized compound bacteria, which comprises the following steps: extracting gardenia lignin by using gardenia waste as a raw material, and preparing an inner-layer wall material to embed a mixed bacteria solution to obtain lignin inner-layer microcapsules; preparing an outer-layer wall material through modified chitosan, and compounding and curing the inner-layer microcapsule, the hydrogenated streptomyces liquid and the outer-layer wall material to obtain the immobilized composite microbial agent. And finally, mixing the immobilized complex microbial inoculant with matrixes such as leaf mold and peat soil to obtain the modifier. Ordered release of compound bacteria is realized through dual response, functional synergy of Rafissonia, Ochrobactrum and Streptomyces hydrogenii can be enhanced through population signal molecule modification, soil nutrients can be activated, effective iron can be chelated to solve the problem of iron deficiency yellowing of cape jasmine, soil pollutants and pesticide residues are degraded, and the soil quality is improved. Pathogenic bacteria reproduction is inhibited, and rhizosphere micro-ecological balance is maintained; plant hormones can be secreted to promote the growth of the cape jasmine, and the cape jasmine is converted into more components with high medicinal value.

The invention discloses a coating processing device for soil conditioner production. The coating processing device comprises an outer cylinder, an inner cylinder, a rolling mechanism, an atomizing and spraying mechanism and a hot air cover, and the outer cylinder is obliquely arranged above a bottom plate through a supporting assembly; the inner cylinder is coaxially and rotatably arranged in the outer cylinder, and a first annular baffle is fixedly arranged on the inner wall of the inner cylinder; the rolling mechanism is rotationally arranged in the inner cylinder and connected with the inner cylinder through a transmission assembly, and the rolling mechanism and the inner cylinder are used for controlling the soil conditioner to roll in a staggered mode; one end of the rolling mechanism penetrates through the bracket and is connected with an air injection mechanism; the air injection mechanism is mounted on the outer cylinder; the atomization spraying mechanism is arranged between the two supports and located above the rolling mechanism. The hot air cover is arranged on the top of the outer cylinder. Therefore, staggered rolling of the soil conditioner is achieved through the inclined inner cylinder and the rolling mechanism, the air injection dispersion function is integrated, multi-direction mixing of the soil conditioner is achieved, and therefore the coating uniformity and effect are improved.

The soil conditioner spraying device comprises a vehicle body, a spray head, a lifting mechanism, a mounting plate, a guide cylinder, a sliding rod, an elastic piece, a driving gear, a driven gear, a first connecting rod, a second connecting rod, an upper limiting rod and a lower limiting rod. A lifting mechanism drives a spray head and a mounting plate to do reciprocating lifting motion, in the lifting process of the spray head and the mounting plate, the spray head inclines upwards and sprays a modifier solution to the back faces of crop leaves, when a second connecting rod makes contact with an upper limiting rod, the spray head changes the direction and inclines downwards, and the spray head and the mounting plate descend; when the second connecting rod is in contact with the lower limiting rod, the direction of the spray head is changed again, the spray head and the mounting plate are lifted again, and the process is circulated in sequence and matched with the movement of the vehicle body to spray the modifier solution to the front surfaces and the back surfaces of all the crop leaves, so that the absorption effect of the crops on the modifier is improved; the crop yield is improved.

The application provides a multistage remediation method for ion-type rare earth tailing area soil composite pollution, aiming at the vertical pollution structure of "surface layer barren-mid-layer heavy metal / radioactivity-deep layer high ammonia nitrogen", and innovatively adopting a "partitioning, different quality, one layer one strategy" strategy. Specifically, the method comprises the following steps: layering and excavating 0-30cm surface layer, 30-50cm mid-layer and >50cm deep layer earthwork; mixing the deep layer earthwork with nitrogen directional conversion coupling material and composite microbial inoculant to construct an ammonia nitrogen targeted removal layer; mixing the mid-layer earthwork with porous matrix coupling stabilizer and functional microbial inoculant to form a heavy metal / radioactivity stable layer; mixing the surface layer earthwork with composite soil conditioner to build a soil improvement layer; and finally planting heavy metal resistant plants. Through the "special material-functional flora-vertical coordination" trinity design, the method realizes accurate, efficient and radical remediation of the whole profile, and avoids resource waste and secondary disturbance.

The application discloses Paracoccus communis C4-4 and C5-3, the preservation number of which is CGMCC NO:31971 and the classification name of which is Paracoccus communis, and the preservation number of which is CGMCC NO:31972 and the classification name of which is Paracoccus communis. Researches show that C4-4 and C5-3 have strong ecological adaptability and good growth promotion ability, and can improve the internal environment of soil in combination with organic materials. A synthetic microbial population constructed by Paracoccus communis comprises C4-4 and C5-3. Tests prove that the synthetic microbial population comprising C4-4 and C5-3 has the advantages of the synthetic microbial population, the microbial population has high alkali production and growth promotion ability, has good ecological adaptability, the pH adaptation range is 4-8, the manganese stress tolerance can reach 5000 μmol / L, can significantly improve the pH of a culture medium, and has obvious alkalization effect. The synthetic microbial population is used as a microbial agent and is compounded with organic materials to prepare a soil conditioner capable of improving acid soil and promoting plant growth. The conditioner is applied to acid and lean soil, can significantly improve the soil pH, improve the content of soil organic matter, nitrogen, phosphorus and potassium, and promote root growth.

The invention provides an organic improver for improving soil structure stability and an improvement method, and belongs to the technical field of improvement of specific waste soil of a refuse landfill. The organic improver for improving the soil structure stability comprises a physical improvement component and a chemical improvement component, the physical improvement component is wormcast with the particle size of 0 to 2.5 mm or 2.5 to 5.0 mm; the chemical improvement component comprises an inorganic base fertilizer and an organic fertilizer, and the application mass ratio of the organic fertilizer to the inorganic base fertilizer is (50: 1)-(40: 1). A physical-chemical coupling synergistic scheme is adopted, physical improvement components and chemical improvement components are clear in division of labor and have synergistic interaction, the core problems of soil physical structure hardening and chemical fertility deficiency are synchronously solved, the defect of single improvement effect in the prior art is overcome, and synchronous optimization of soil physical properties and chemical fertility is achieved.

The invention discloses a humic acid-based soil alkalinity adjusting agent and a preparation method thereof, and belongs to the field of soil amendments, the humic acid-based soil alkalinity adjusting agent comprises the following raw materials by weight: 30-50 parts of a modified humic acid carrier; 8-15 parts of carbonate; 3-5 parts of a microbial agent; wherein the modified humic acid carrier is prepared from the following raw materials: acylating chlorinated nano humic acid, sulfamic acid and acidified chitosan in a mass ratio of 1: (0.1-0.4): (0.1-0.3). The density of acidic functional groups is improved by modifying nano humic acid through sulfamic acid, a three-dimensional network structure is constructed by the nano humic acid and acidified chitosan, and meanwhile, carbonate, a microbial agent and hydroxyapatite are compounded, so that high efficiency and durability of an alkali adjusting effect are realized. Compared with a traditional inorganic acid modifier, the modifier can prevent local pH sudden change from burning crop root systems, the three-dimensional network structure can delay carbonate release, the alkali adjusting effect is continuous, and the problems that a traditional modifier acts transiently, and soil is prone to being damaged are effectively solved.

The invention discloses a selenium-rich rice mineral source soil conditioner and a preparation method thereof, and belongs to the technical field of soil conditioning materials. The conditioner comprises the following raw materials in parts by weight: 30-70 parts of biological activated yellow phosphorus slag, 1-1.5 parts of soluble selenium, 23-62 parts of an activating agent and 3-10 parts of a modifying agent. The method is characterized in that the biological activated yellow phosphorus slag is prepared by sequentially carrying out thermal activation and acid activation on yellow phosphorus slag and then carrying out solid-state fermentation by utilizing a compound microbial agent consisting of paenibacillus mucilaginosus, lactobacillus acidophilus and P.megatherium. Through unique biological activation modification, the industrial problems that a mineral source conditioner is low in granulation rate and slow in particle hardening and disintegration are solved in a synergistic mode, acid soil can be effectively improved, absorption and enrichment of rice on selenium are remarkably promoted, and high-added-value resource utilization of the yellow phosphorus slag is achieved.

The application discloses a kind of fertilizer dynamic mixing device with soil conditioner quantitative blending mechanism, including mixing box, two feed tanks, driving part and speed regulation mechanism;Mixing box is equipped with agitator inside, and bottom is equipped with openable and closable discharge port;Two feed tanks are respectively arranged in the top of the two sides of the mixing box;The side of the feed tank is equipped with feed hopper, and bottom is equipped with the distribution port being communicated with the inside of mixing box;The inside of the feed tank is equipped with distribution mechanism, and the material entered at feed hopper is put into the inside of mixing box according to certain speed;Driving part is connected with the distribution mechanism of two feed tanks respectively, and drives distribution mechanism to put material towards mixing box;Speed regulation mechanism is connected with the distribution mechanism of one feed tank, and is used to adjust the speed of distribution mechanism to put material.Solve the problem that proportioning precision is low, adjustment is inconvenient and continuous operation is difficult.