148 results about "Soil aggregate" patented technology

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 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 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 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 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 application provides a method for preparing regenerated soil by using phosphogypsum, which takes bulk solid waste phosphogypsum as raw material, and through harmless treatment, microbial alternate fermentation and trace element compound treatment, a regenerated soil with high fertility, stable structure and strong water and fertilizer retention capacity is obtained, which can be directly used for crop planting. The method can promote the plant absorption of Ca, S, P and other elements in the phosphogypsum, and realize the land utilization of all components of the phosphogypsum. In addition, through the formation of organic-inorganic complex by the compounding fermentation technology, the complex can not only promote the formation of soil aggregate structure, but also improve the biological effectiveness of trace elements and the stability of organic matter in the soil, and then build a high-quality regenerated soil with strong water retention and air permeability and long-lasting fertilizer efficiency. The application can not only effectively solve the problem of phosphogypsum storage, but also apply the prepared regenerated soil to farmland improvement, land reclamation and crop planting, and realize the goal of turning waste into treasure.

The invention relates to the field of comprehensive treatment of saline-alkali soil, and discloses a method for improving saline-alkali soil and application. The method comprises the following steps: burying a pre-burying agent in soil of soda saline-alkali soil with the water content of 20-35wt%; applying an eluting agent to the soil; after crops are planted, a microbial agent is applied through a drip irrigation system; the eluting agent comprises modified or unmodified polysiloxane, and the surface active agent comprises sulfonate of C5-C20. According to the method, the soda saline-alkali soil is improved by using the specific modifier and the method, so that the salt content and the pH value of the saline-alkali soil are reduced, the soil aggregate structure of the saline-alkali soil is improved, the content of organic components and humus in the soil is increased, the productivity of the soda saline-alkali soil is improved, and the adaptability and the tolerance of crops to adverse environments are enhanced. The improvement period of the saline-alkali soil can be further shortened, the comprehensive cost of large-scale improvement is reduced, and meanwhile the stability of the improvement effect is improved.

The utility model relates to the related technical field of wet-type soil separation, and provides a soil aggregate wet screening device which comprises a shell and a stand column, the stand column is fixed to the outer wall of the shell, a screening plate is arranged in the shell, a discharging assembly is arranged at the bottom of the shell, and a top-layer screening-out assembly is arranged on the stand column. The vibration assembly is arranged in the shell and comprises a plurality of fixing plates, the fixing plates are fixed to the top of the inner wall of the shell, round holes are formed in the surfaces of the fixing plates, a pair of damping springs is arranged on the surfaces of the fixing plates, the upper ends of the damping springs are connected with a bottom plate, and a vibration motor is arranged on the bottom plate. By means of the technical scheme, the technical problems that in the prior art, it is difficult to accurately control the up-down moving distance of the screen and it is also difficult to control the moving frequency of the screen by manually utilizing the screen for screening are solved.

The application provides a method for increasing the proportion of large-diameter soil aggregates based on straw utilization, and relates to the tobacco planting technical field.The method comprises the following steps: S1: crushing field straw and stubble by using a crusher to obtain crushed materials; S2: mixing the crushed materials with organic fertilizer and water, and centrally stacking on the surface of soil to pre-ferment to obtain mixed materials, then spraying bacteria liquid 1, covering a film, and carrying out aerobic fermentation to obtain fermented materials; S3: removing the film, uniformly spreading the fermented materials, spraying bacteria liquid 2, using a powder ridge deep plough to plough, and carrying out water irrigation treatment to carry out anaerobic fermentation.The method has a greater influence on the powder clay aggregates and the medium aggregates in the plough layer soil, and has a smaller influence on the large aggregates; for the plough bottom layer soil, the method reduces the proportion of the powder clay aggregates, realizes the expansion of the small-diameter aggregates, improves the proportion of the medium and large aggregates, and is beneficial to expanding the depth of the plough layer.

The invention discloses a high-activity organic fertilizer for conditioning a degraded cultivated land soil structure, and belongs to the technical field of organic fertilizers. Comprising the following components in parts by mass: 20-40 parts of cow dung, 10-20 parts of peanut shells, 10-15 parts of thermoelectric straw ash, 2-5 parts of carboxymethyl chitosan, 0.5-1 part of a silane coupling agent, 3-8 parts of a modified organic fertilizer additive, 0.1-0.5 part of zinc sulfate, 0.3-0.5 part of calcium phosphate and 0.5-1.5 parts of a complex microbial inoculant. Synergistic effects of straw ash, decomposed cow dung, pretreated peanut shells and complex microbial inoculants are utilized to systematically improve degraded cultivated land: organic matters and active silicon are supplemented, and agglomerates are cemented and stabilized; multistage pores are formed, so that the permeability and the pollutant adsorption capacity are improved; the microbial agent secretes cement, fixes nitrogen, winds hyphae and repairs a microbial network. Particularly, a three-dimensional network is formed through coupling of carboxymethyl chitosan and a modified additive containing chelating / hydrophilic groups, so that the fertilizer stability, the nutrient slow release property and the mechanical and water erosion resistance of soil aggregates are enhanced, and long-term optimization of a soil structure and improvement of ecological functions are realized.

The invention is applicable to the technical field of soil improvement, provides a method for improving soil by inputting organic materials and application, and aims to solve the degradation problems of soil hardening and nutrient imbalance of Yuluihu dry-hot valley vineyards in the method, cow dung, fungus bags and mixtures of the cow dung and the fungus bags are used as organic materials, and random block test design is adopted. The method comprises the following steps: dividing a degraded vineyard into plots and test plots with specific specifications, applying organic materials, and measuring the water retention capacity, aggregate composition and nutrient element content of soil through layered soil sampling to realize soil quality regulation and control. Adaptive organic materials can be selected according to soil problems and grape growth requirements, the cow dung can remarkably improve the phosphorus content of the soil, the cow dung and the fungus bags can optimize the soil aggregate structure, the water and fertilizer retention capacity, ventilation and water permeability of the soil are effectively improved, technical support is provided for sustainable development of the dry-hot valley grape industry, and the application prospect is wide.

The application discloses a cutting device for Phyllostachys nidularis, and relates to the technical field of Phyllostachys nidularis cultivation.The device comprises a rack, a soil aggregate transformation mechanism, a cutting mechanism and a controller.The soil aggregate transformation mechanism comprises a flat ring which is driven to move up and down by a first driving mechanism, and a rotating plate which is vertically arranged under the flat ring and is driven to rotate by a second driving mechanism.The rotating plate is inserted into soil and rotated, and the second driving mechanism drives the rotating plate to extrude the soil in the vertical projection of the flat ring towards the inner side of the flat ring.The cutting mechanism is driven to move in an inclined direction with the front being lower and the rear being higher.The controller is electrically connected with the first driving mechanism, the second driving mechanism and the cutting mechanism.The device can improve the water retention of soil, does not affect the drainage, and keeps the cutting hole depth consistent.

The invention provides a high and steep slope soil aggregate modifier based on a carbon component and a preparation method thereof, and belongs to the field of soil improvement and ecological restoration, and the modifier comprises the following raw materials: a granular organic carbon source, a mineral binding organic carbon source, a nanometer and microbial stabilizer and the like. A preparation method of the modifier comprises the following steps: mixing the humic acid, the leaf mold and the pine needle mulch, putting the mixture into a sodium hexametaphosphate solution, reacting, drying, and grinding to obtain the mineral bound organic carbon source; the preparation method comprises the following steps: uniformly mixing a granular organic carbon source, a mineral combined organic carbon source, nano CaCO3, a microbial stabilizer and the like, adding water, fermenting to obtain a fermentation product, drying, and crushing to obtain the modifier. According to the modifier, through the synergistic effect of multiple components, the ecological function of high and steep slope degraded soil is effectively recovered, the aggregate structure stability of the improved soil can be improved, and the long-term stability of aggregates and the organic carbon storage capacity are enhanced.

The invention provides a fertilizer synergist. The fertilizer synergist comprises a urease inhibitor, glutamic acid, organic silicon and a load carrier, the invention further provides a preparation method of the fertilizer and application of the fertilizer in improving the fertilizer utilization rate in the dry-farming potato planting process. According to the invention, the space-time synergistic effect of NBPT and L-glutamic acid discovered for the first time is taken as a basic mechanism; nBPT delays urea hydrolysis, and creates a time window for L-glutamic acid to activate root nitrogen transporter; l-glutamic acid is combined with soil particles through carboxyl of L-glutamic acid to form a slow-release microenvironment, meanwhile, root systems are promoted to secrete organic acid, and nitrogen absorption is enhanced; the organic silicon can change the soil agglomeration structure, increase the water holding capacity of the soil and reduce water infiltration and evaporation; through the synergistic effect of the three, the effective retention time of the nitrogen fertilizer in a root zone is remarkably prolonged, and the nitrogen utilization rate and the water utilization efficiency are improved.

The soil analyzer comprises a base, a machine body, four cylinder bodies and four oscillating screen frames, the machine body is fixedly connected to the upper end of the base, the four cylinder bodies are respectively and uniformly placed on the upper surface of the base, the four oscillating screen frames are respectively and uniformly placed on the upper surface of the base, and the four oscillating screen frames are respectively and uniformly placed on the upper surface of the base. And the four rotating shafts are respectively arranged in the four cylinder bodies. According to the soil aggregate structure analyzer disclosed by the utility model, the base, the machine body, the barrel body, the oscillating screen frame, the stabilizing device, the clamping assembly, the clamping plate, the connecting shaft, the moving plate, the stroke groove, the linkage assembly, the rotating shaft, the rotating piece, the pressing rod, the movable groove, the control assembly, the positioning plate and the rubber non-slip mat are matched for use; the problems that a cylinder body of the vibrating screen is usually directly placed on the upper surface of a base and cannot be stabilized, so that the cylinder body cannot be stabilized, and a vibrating screen frame moves in the vibrating screen frame, so that the cylinder body easily slides, deviates and even topples over are solved.

The application discloses a preparation method of lignin-based biomass compound fertilizer, which takes the alkali lignin subjected to directional oxidation and activation treatment as a matrix, constructs an organic network structure by allowing the activated lignin to undergo condensation reaction with a polyamine or a polyol, then introduces multivalent metal ions such as iron, calcium or magnesium to form a coordination crosslinking framework, and finally loads biomass active nutrients such as urea, phosphate, potassium salt, humic acid and amino acid into the lignin network to prepare lignin-based biomass compound fertilizer particles through a spray drying process. The method has mild operation conditions, does not involve harmful organic solvents and is environmentally friendly. The obtained compound fertilizer particles have high nutrient loading capacity and good slow-release characteristics, can improve soil aggregate structure, improve nutrient utilization efficiency and reduce the application amount of chemical fertilizers, thereby realizing high-value utilization of lignin resources and being suitable for green agriculture and sustainable production system.

The invention belongs to the technical field of soil turning for agricultural ploughing, and particularly relates to a soil turning machine for agricultural ploughing. The left end of the bottom of the operating mechanism is used for blocking and smoothing soil turned out by the soil turning assembly, the left end of the bottom of the operating mechanism is connected with the soil turning assembly, the front end and the rear end of the soil turning assembly are connected with the driving end of the operating mechanism, and the soil turning assembly is used for turning soil punctured by the deep plowing assembly. According to the deep soil elastic alternate puncturing and backward scraping device, deep soil elastic alternate puncturing and backward scraping are achieved, a tough spring buffers resistance, a soil layer is not turned over, a plow pan is thoroughly broken, and a soil aggregate structure and a microbial environment are reserved.

The invention relates to the technical field of coastal saline-alkali land improvement. The invention provides a saline-alkali soil modifier as well as a preparation method and application thereof. The saline-alkali soil modifier is prepared from the following components in parts by weight: 80 to 120 parts of desulfurized gypsum, 60 to 64 parts of lignite, 32 to 36 parts of fly ash, 200 to 240 parts of straw, 100 to 120 parts of medical stone, 130 to 150 parts of decomposed livestock and poultry manure, 15 to 25 parts of microbial agent, 10 to 16 parts of furfural residue and 20 to 24 parts of alginic acid. The modifier provided by the invention is reasonable in formula, the use of gypsum can be effectively reduced, and meanwhile, the granular structure and the organic matter content of soil are improved by utilizing microorganisms, livestock and poultry manure and the like. By matching with the improvement method provided by the invention, salt in the soil is effectively transferred, the salt content in the soil is reduced, and the application effect on the coastal saline-alkali soil is very obvious.

The invention belongs to the technical field of salt manufacturing systems, and relates to a preparation method and application of a saline gypsum-based soil conditioner. According to the invention, a low-carbon green process route is established, the salty gypsum is taken as a raw material, firstly, the salty gypsum is subjected to resource desalination by adopting a three-stage countercurrent circulation elution process, and multi-stage washing water is recycled and finally returns to a salt production system for industrial salt production, so that internal circulation and zero emission of wastewater are realized; then adopting a desalted gypsum-ammonium bicarbonate-phase transfer catalyst reaction system to generate a mixed solution containing light calcium carbonate microcrystals through a phase transfer catalytic reaction; finally, the mixed liquid is settled and stood, separated supernatant liquid is used as a next batch of base solution after the catalyst is supplemented, consumption of the catalyst and raw materials is reduced, light calcium carbonate and ammonium sulfate are recycled from lower-layer slurry, potassium chloride is compounded, and the novel soil conditioner is obtained. The gap diameter of soil is enlarged, and the soil improvement effect is improved.

The invention relates to soil remediation equipment. The soil remediation equipment comprises a rack; the plough is arranged in front of the rack; the rotating shaft is arranged behind the rack and located on the rear side of the plough, and a tilling cutter is installed on the rotating shaft; the spraying pipeline is arranged on the rotating shaft and provided with at least one nozzle, and the nozzles are arranged close to the tilling cutter so as to spray pesticide into the soil when the tilling cutter works. Thus, the plough is arranged in front of the machine frame to destroy the soil structure in advance and reduce follow-up blade resistance, the blade installed on the rotating shaft behind the machine frame rotates at a low speed to reduce damage to the soil aggregate structure, and meanwhile the spraying pipeline close to the blade is arranged on the rotating shaft to spray pesticide to the interior of the soil. A synergistic structure of breaking resistance in advance through a plough, turning soil through a low-speed tilling cutter and spraying pesticide through a near cutter is formed, sufficient turning of deep soil of about 50cm is effectively achieved, uniform mixing of the pesticide and the deep and shallow soil is promoted, and secondary pollution caused by flying dust is restrained from the source.

The invention discloses a rice field soil body configuration reconstruction method which comprises the following steps: S1, ploughing a dry field, and then irrigating to steep the field; s2, slurry stirring is completed through a rotary cultivator and other equipment; s3, straw is added into the field after slurry stirring is completed; and S4, before rice transplanting, applying a soil structure reconstruction agent to the field. By adding the soil structure reconstruction agent with a bonding function, the granular structure of the stirred soil is remarkably improved, so that the water and fertilizer retention performance of the soil is improved, the soil fertility is improved, meanwhile, various nutritional ingredients capable of promoting rice growth are released through straw decomposition, and the yield of'non-grain treatment 'rice fields is finally improved.

The present application relates to the field of intelligent agricultural mycorrhizal fungus fertilizer production and application, and discloses a method and application for intelligent soil testing, mycorrhizal fungus fertilizer preparation, quality improvement and soil improvement, which is based on the use of full spectrum direct reading plasma emission spectrometry IPC-OES / ICP-MS, elemental analyzer VarioEL, ion chromatography HPIC combination, and qualitative and quantitative exchange capacity CEC, discloses a method and application for intelligent soil testing, mycorrhizal fungus (AMF) fertilizer preparation, quality improvement and soil improvement by using a chlorophyll nitrogen dynamic monitoring (SPAD value) instrument, a phosphorus online detector and a potassium online detector, which uses a double cultivation and propagation method of mycorrhizal fungus hypha secretion of sphaerocystin, activates plant related gene pathways, improves the quality of crops such as food, vegetables, tobacco leaves and Chinese herbal medicines, and the drought resistance, cold resistance and disease resistance of the crops, forms soil aggregates, increases soil porosity, effectively relieves compaction, and reduces the use amount of chemical fertilizer by 60-80% and pesticide by 70-90%.

The invention discloses a method for preparing a low-grade phosphorite-biomass composite modifier for promoting regeneration of a soil aggregate structure. The composite modifier comprises the following raw materials: low-grade phosphorite, an activating agent, a biomass complex, a soil conditioner, a cementing agent and a microbial agent in a mass ratio of (32-85): (20-50): (25-38): (25-44): (20-36): (5-14). The low-grade phosphorite and the biomass are combined to construct a mineral skeleton-organic bonding synergistic system, the low-grade phosphorite provides a mineral skeleton to support aggregate formation, the biomass plays a bonding role and increases organic matters, and the low-grade phosphorite and the biomass synergistically promote the regeneration of a sandy soil aggregate structure, so that the soil structure regeneration is improved. And a new path with technical innovation and economic feasibility is provided for soil improvement of sandy soil.

The application discloses a soil loosening device and method for saline-alkali soil treatment with adjustable depth, and relates to the technical field of soil loosening devices.The device comprises a connecting frame, an electric push rod fixedly installed in the connecting frame, a fixed plate fixedly connected to the extending end of the electric push rod, and the electric push rod is used to drive the fixed plate to move up and down.The device is provided with a movable plate and a crushing rod driven by a cam driving element behind the ploughshare, the movable plate and the crushing rod are driven to move up and down reciprocatingly through the cooperation of a cam disc and a spring, the movable plate is automatically rotated in the process of moving up and down through the sliding cooperation of a semicircular block in a guide cylinder and a spiral groove on the crushing rod, the crushing rod is rotated while turning over the soil up and down, the soil preliminarily loosened by the ploughshare is subjected to secondary refinement treatment, large soil blocks are crushed into small particles, the soil aggregate structure and permeability are effectively improved, and good soil conditions are created for the subsequent salt leaching and crop growth of the saline-alkali soil.

The invention discloses a mushroom bran compound fertilizer for improving saline-alkali soil and a preparation method and application thereof, and belongs to the technical field of saline-alkali soil improvement. The mushroom bran compound fertilizer comprises 70%-90% of corncob matrix mushroom bran and 10%-30% of organic materials. The corncob matrix mushroom bran comprises the following components in percentage by mass: 50% of corncob, 33.2% of sawdust, 10% of bran, 3% of corn flour, 2.5% of lime, 0.8% of gypsum and 0.5% of an oyster mushroom nutrient; the organic material is one or more of cow dung, sheep manure and pig manure. The preparation method of the mushroom bran compound fertilizer comprises the following steps: uniformly mixing the corncob matrix mushroom bran and the organic material, composting and fermenting, airing, crushing and sieving. The mushroom bran compound fertilizer is directly added into soil and is uniformly turned and mixed with plough layer soil, so that the nutrient content in the soil can be effectively improved, the alkalization degree of the saline-alkali soil is reduced, the soil porosity is improved, the granular structure of the saline-alkali soil is improved, and the permeability of the saline-alkali soil is improved.

This invention discloses a method for preparing graded porous aggregate-type soil using phosphogypsum. The main steps of the method include: adding air-dried phosphogypsum, cement, bentonite, and plant straw into a granulator in a certain proportion; spraying a certain amount of water in batches; and continuing to rotate the granulator to obtain aggregates; the aggregates are then treated with CO2 mineralization to obtain phosphogypsum-based aggregates with suitable acidity and alkalinity; preparing porous soil aggregates according to gradation requirements; composting to prepare organic fertilizer; and mixing the phosphogypsum-based soil aggregates and organic fertilizer to obtain soil suitable for planting. The soil obtained by this invention has a graded porous structure with large pores between particles and micropores within particles, good water permeability and air permeability, sufficient fertility, and good water stability of the aggregates. It can effectively solve the problem of compaction in the existing utilization of phosphogypsum soil. The method is simple to operate, has low material costs, and requires mature equipment, making it particularly suitable for providing a high-quality and inexpensive source of planting soil for rocky desertification areas.

The application discloses a kind of soil aggregate organic carbon mass fraction determination system and method, comprising: heating device;Support, be equipped in heating device, it is equipped with guide rail device one, reagent adding piece one and push material piece on it, the sliding block of guide rail device one is connected with test tube piece;Guide rail device two, be equipped in heating device side wall, it is equipped with titration test piece and indicator adding piece on guide rail device two, the sliding block of guide rail device two is connected with receiving bottle.The application is driven by guide rail device one to move test tube piece to reagent adding piece one and add reagent, move to the heating end of heating device and heat, and move to push material piece and be driven by push material piece to unload test, and after unloading to receiving bottle, guide rail device two is driven to move receiving bottle and correspond to indicator adding piece and titration test piece in turn, reduce artificial operation intensity, improve determination work efficiency while effectively reducing human operation error.

The invention belongs to the technical field of soil improvement, and relates to an enhanced double-layer coated nano mineral soil conditioner and a preparation method thereof.The preparation method specifically comprises the steps that nano minerals and natural polymer materials are mixed in a reaction system according to the mass ratio, and a core-shell material is formed; and mixing and stirring the core-shell material and the polymer hydrogel, and drying to obtain the double-layer coated soil conditioner. According to the conditioner, through dual modification of natural polymers and hydrogel, agglomeration and inactivation of nano minerals are effectively prevented, and the dispersity and long-term stability of the conditioner in soil are improved. Meanwhile, the porous light structure can improve the granular structure, water binding capacity and porosity of soil, promote microbial diversity and achieve synergistic interaction of carbon sequestration and soil improvement, the raw materials are environmentally friendly, the preparation process is mild, universality is high, the slow release characteristic is achieved, the content of organic matter in soil and the crop yield can be remarkably increased, and the application prospect is wide. The method is suitable for agricultural soil improvement and carbon sequestration and sink increase.

The invention relates to a coast saline-alkali soil carbon-based modifier and a preparation method and application thereof. The coast saline-alkali soil carbon-based modifier is prepared from, by mass, 50-60 parts of straw biochar, 20-30 parts of vinegar residues, 15-20 parts of humic acid and 5 parts of calcium sulfate. According to the invention, the problems of high salinity content, low nutrient storage capacity, weak fertilizer retention capability and the like of the coastal saline-alkali soil are effectively solved: straw charcoal, vinegar residues, humic acid and calcium sulfate are combined, so that the salinity and pH of the soil can be reduced, and salt return of the soil is effectively inhibited; meanwhile, the content of organic carbon, nitrogen and phosphorus nutrients in the soil can be increased, and the fertilizer retention capacity of the soil is effectively enhanced; in addition, formation of soil aggregates can be effectively promoted, the soil physical structure of the coastal saline-alkali soil is improved, and then the conversion process of the coastal saline-alkali soil to agricultural soil is accelerated.

The invention relates to the technical field of fertilizers, and particularly discloses a liquid fertilizer containing bacillus velezensis LLH-D2. The organic fertilizer is prepared from the following raw materials in parts by weight: 24 to 26 parts of compound microorganism bacterium powder, 10 to 13 parts of chicken manure, 5 to 6 parts of dipotassium phosphate, 13 to 15 parts of glucose, 10 to 12 parts of amino acid, 16 to 18 parts of straw compound powder, 3 to 5 parts of sodium lignin sulfonate, 10 to 14 parts of attapulgite powder and 240 to 250 parts of water. According to the prepared liquid fertilizer, various raw materials are matched to jointly promote formation of a soil aggregate structure, increase the content of organic matters in soil, improve the micro-ecological environment of the soil and increase the yield of crops.