26 results about "Soil aggregate" patented technology

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 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 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 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 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.

This invention discloses a slope soil aggregate erosion and disintegration testing device, belonging to the field of geotechnical engineering testing technology. The device includes: a model box assembly, a rainfall simulation assembly, an optical observation assembly, and a runoff collection assembly. The model box assembly includes a box body and a slope adjustment mechanism. The slope adjustment mechanism uses multiple hinged plates in conjunction with a hydraulic drive device to achieve precise adjustment of the slope angle in segments. The uppermost layer of the filling area inside the box body is divided into several tracer zones, each tracer zone being covered with a soil layer containing different colored fluorescent tracers. The rainfall simulation assembly simulates natural rainfall processes. The optical observation assembly includes a light shield, an ultraviolet light source, a camera, and a filtering system to achieve fluorescence imaging. The runoff collection assembly uses a sampler to collect sediment samples at different time intervals. This invention can accurately track the soil loss path at different slope locations, enabling visualized observation and quantitative analysis of the soil erosion process, providing a systematic experimental method for studying soil disintegration mechanisms.

This invention relates to the field of saline-alkali land amendment technology. The invention provides a saline-alkali land amendment, its preparation method, and its application. The saline-alkali land amendment comprises the following raw materials in parts by weight: 50-60 parts of straw and livestock manure compost, 30-40 parts of lignite powder, 2-4 parts of desulfurized gypsum, 2-4 parts of citric acid gypsum, 3-4 parts of superphosphate, 3-4 parts of γ-polyglutamic acid, and 1-2 parts of a compound microbial agent solution. This invention effectively increases the organic carbon content of saline-alkali land and improves soil aggregate structure by introducing manure-based and mineral-based organic fertilizers; it enhances the calcium-increasing and sodium-removing effects of desulfurized gypsum, citric acid gypsum, and superphosphate; it introduces γ-polyglutamic acid, which has strong water retention and ion chelating capabilities, effectively fixing salts; and it introduces a compound microbial agent that not only regulates the microbial community composition of saline-alkali land but also produces acid to regulate soil pH and activate fixed phosphorus in the soil.

This invention discloses a soil aggregate remediation fertilizer based on microbial-induced mineralization and in-situ crosslinking of EPS, and its preparation method, belonging to the field of soil remediation fertilizers. This invention aims to solve the technical problems of existing technologies for remediating degraded black soil, such as limited functionality, poor environmental adaptability, and difficulty in simultaneously improving soil structural stability and fertility. The fertilizer consists of a specific ratio of corn cob powder, beet pulp, distiller's grains, pine needle powder, straw, diatomaceous earth, bentonite, humic acid, compound functional microbial agents, and trace elements. The preparation method involves CO₂-protected modified straw, activated mineral carriers, compound mineralization promoting components, and synergistic fermentation using an EPS in-situ crosslinking inducer and compound functional microbial agents. This fertilizer is mainly used to repair the aggregate structure of degraded black soil, increase soil organic matter content, improve porosity and erosion resistance, and promote crop growth.

The application belongs to the technical field of agricultural resources and environment, and particularly relates to a compound fertilizer for acid soil and a preparation method thereof, wherein the compound fertilizer is a compound particle with a double-layer structure; the compound particle comprises a core and a shell coated on the outer surface of the core; the core comprises chemical fertilizer, potassium-mineral fulvic acid and a first binder; and the shell comprises alkali lignin, potassium humate and a second binder; after the compound fertilizer is applied to acid soil, alkali lignin and potassium humate in the shell can rapidly react with hydrogen ions in the soil, are dissolved and form organic-inorganic composite colloid rich in functional groups such as carboxyl and phenolic hydroxyl groups, so that the soil pH value can be effectively improved and stabilized; relying on the physical barrier of the shell and the ion exchange and complex adsorption of the new colloid, the fixation of phosphorus and the leaching loss of nitrogen and potassium can be significantly reduced, the soil aggregate structure can be promoted, and long-acting fertilizer preservation and buffering capacity can be provided.

This invention belongs to the field of soil conditioner technology, and relates to an organic-inorganic coupled conditioner for improving soda saline-alkali land and its preparation method. The inorganic particles are composed of a mixture of activated polyaluminum ferric sulfate, activated zeolite powder, transcrystalline gypsum, trace elements, and reinforcing agents. The organic slurry is homogenized from activated humic acid extract, modified lignin sulfonate, functional biochar complex, and polyglutamic acid concentrate, and then subjected to spray granulation and high-temperature, high-humidity aging to achieve chemical cross-linking at the organic-inorganic interface, forming a stable three-dimensional network structure. The resulting conditioner integrates chemical exchange, physical adsorption, organic complexation, and biostimulation, and can rapidly reduce soil pH and alkalinity, improve soil aggregate structure, enhance nutrient retention capacity, and has a long-lasting effect and is environmentally friendly, making it suitable for the comprehensive management of soda saline-alkali land.

The utility model provides a kind of straw strip cleaning and returning device, comprising: main suspension bracket, the lower end of the main suspension bracket is hingedly connected with lifting frame, fixedly connected with carrying frame on the lifting frame, the rear side of the main suspension bracket is provided with the connecting pedestal fixedly connected with tractor front end;Driving part, the driving part is installed on the lifting frame with the carrying frame;Chipping part, the chipping part is installed below the carrying frame, and is transmission connection with the driving part;The straw strip cleaning and returning device is matched with returning part through chipping part, after being pulverized planting strip stubble by rotating chipping knife, returning part synchronously gathers straw and pulverized rhizome, to carry out the operation of deep burying straw into field, and then tractor is not needed in field multiple operations, avoid the problem of repeated soil compaction caused by tractor multiple times in traditional operation, protect soil aggregate structure, reserve good soil aeration and water retention for subsequent cultivation.

This invention relates to the fields of ecological science and soil carbon sequestration technology, specifically to a method for promoting soil carbon sequestration using calcium ions and biochar. The method comprises the following steps: pre-culturing soil under sealed, light-protected conditions for 6-10 days; adding biochar and a calcium source to the pre-cultured soil; mixing thoroughly; and then formally culturing under the same conditions as the pre-culture for 50-70 days. This invention introduces calcium ions into biochar. Calcium ions, through cation bridging and inorganic cementation, significantly promote the formation of large soil aggregates and substantially increase the saturated adsorption capacity and affinity of biochar for dissolved organic carbon, thereby effectively reducing the risk of mineralization loss of organic carbon in the soil. This method is simple to operate and low in cost, providing effective technical support for overcoming the bottleneck of soil carbon sequestration using biochar and improving the application benefits of biochar.

This invention provides a *Pseudomonas plecoglossicida* strain, its inoculant, and its applications, relating to the field of microbiology. Specifically, the *Pseudomonas plecoglossicida* NT strain, with accession number CGMCC No. 25090, can efficiently convert nitrate nitrogen, reduce the accumulation of nitrates in soil, and remediate secondary salinized soils. It also possesses the ability to produce extracellular polysaccharides, promoting the formation of soil aggregates and increasing soil cohesion. Furthermore, this strain can successfully colonize the rhizosphere soil of vegetables, improving the rhizosphere ecological environment, promoting vegetable growth, and increasing yield. This achieves the goal of ensuring both the sustainable development of modern agriculture and the quality and quantity of crops. The strain of this invention has relatively comprehensive soil remediation capabilities and has enormous application potential.

The present application relates to a high utilization rate compound fertilizer with a protective layer and a preparation method thereof, and belongs to the technical field of agricultural fertilizers. Bio-based polyols prepared by liquefaction of corn cobs are compounded with natural epoxy soybean oil to serve as a coating core raw material. Both of them contain functional groups such as hydroxyl groups and ester groups that can be degraded by soil microorganisms. The membrane shell has a high biodegradation rate, and will not accumulate residues during long-term use. Meanwhile, the polyurethane crosslinking network cooperates with soil microorganisms to maintain soil aggregate structure, improve air and water permeability, effectively avoid soil compaction, and form stable chelates with magnesium and iron ions to avoid the precipitation of trace elements in the soil with clay minerals and phosphate, thereby improving the absorption rate of crops. In combination with the inhibitory effect of urease inhibitors on urease activity, a dual controlled release system of physical barrier and biological inhibition is constructed to prolong the release period of nitrogen and match the nutrient requirements of crops during the growth period.

The application discloses a portable soil aggregate sampling device and a sampling method. The sampling device comprises a supporting small shovel and a mounting seat with a sampling cutter at the bottom end. The sampling cutter comprises a middle blade, and the two sides of the middle blade along a second horizontal direction are respectively provided with a first side blade and a second side blade which can be synchronously away from or close to each other. The middle blade, the first side blade, the second side blade and the bottom end surface of the mounting seat form an accommodating cavity, and the opening of the accommodating cavity is used for communicating with a soil profile pit. The supporting small shovel comprises a bearing plate, and the two sides of the bearing plate in the second horizontal direction are respectively inwardly folded to form a first baffle and a second baffle. The bottom end of the bearing plate is inwardly folded to form a cutting baffle. The bearing plate, the first baffle, the second baffle and the cutting baffle form a sampling cavity. The supporting small shovel is used for being placed in the soil profile pit and can be inserted into the accommodating cavity in a first horizontal direction. The application ensures that the soil aggregate sample remains in an integral hierarchical structure after being taken out.

The application discloses a planting method for improving corn yield and belongs to the technical field of corn planting. The planting method comprises the following steps: applying a compound microbial fertilizer as base fertilizer before sowing and additionally applying the compound microbial fertilizer during the corn growth period; the compound microbial fertilizer contains the following components in parts by weight: 38 parts of compound microbial bacteria, 42 parts of rotten cow dung, 12 parts of corn straw powder, 20 parts of wood ash, 7 parts of humic acid and 4 parts of potassium sulfate. The compound microbial bacteria comprise bacillus subtilis, bacillus licheniformis and bacillus laterosporus, and the ratio of the three is 0.8:1:1.2. The application improves the soil structure by using the biological microbial fertilizer, increases the soil organic matter content, improves the soil aggregate structure, makes the corn grow more robust, has more large grains and increases the thousand-grain weight, and thus significantly improves the corn yield and quality.

This invention discloses a method for constructing a functional zone of subsurface organic matter in sloping farmland based on manure-inducing straw return, relating to the fields of soil improvement and water and soil conservation. Addressing the core pain point of topsoil stripping and erosion in sloping farmland, this invention utilizes an engineered scheme of manure-inducing straw return, which can increase the straw degradation rate by 30%–60% compared to conventional straw return techniques, significantly shortening the decomposition cycle. Within a single crop growing season, it can increase the organic matter content of the subsurface soil in sloping farmland by 20%–50%, simultaneously optimizing soil aggregate structure, enhancing soil water and fertilizer retention and erosion resistance, and effectively mitigating the risks of nitrogen competition and yield reduction during the seedling stage caused by straw return. This scheme can restore corn yield to the level of unstripped plots under erosion conditions with 20cm of topsoil stripping, achieving synergistic promotion of soil remediation and stable crop yield.

The embodiment of the application provides a kind of based on straw rot- soil structure improvement parallel control method, it is related to the technical field of information-based agricultural technology.The method includes: collecting hyperspectral reflectance data stream and soil conductivity data;Based on hyperspectral reflectance data stream and soil conductivity data, construct the potential energy field matrix;Based on the potential energy field matrix, the physical farmland space is divided into multiple logical subdomains, and the mapping relationship between logical subdomain and parallel control core is constructed;Based on parallel control core, biochemical-structure coupling simulation is executed, and speculative boundary condition exchange is executed between logical subdomains, to generate the time-varying biochemical state vector of each grid containing microbial exopolysaccharide content;Based on microbial exopolysaccharide content, calculate the soil aggregate structure stability index, and generate the control instruction of field operation.Through the application, the problem of low utilization rate of computing resources is solved, and the effect of improving the utilization rate of computing resources is achieved.

The application belongs to the technical field of soil improvement, and relates to an enhanced double-layer coated nanomineral soil conditioner and a preparation method thereof, and specifically comprises the following steps: mixing a nanomineral and a natural polymer material in a reaction system according to a mass ratio to form a core-shell material; and mixing and stirring the core-shell material and a polymer hydrogel, and obtaining the double-layer coated soil conditioner after drying. The conditioner is double-modified by the natural polymer and the hydrogel, effectively prevents agglomeration and inactivation of the nanomineral, and improves the dispersibility and long-term stability of the nanomineral in soil. Meanwhile, the porous and light structure of the conditioner can improve soil aggregate structure, water retention and porosity, promote microbial diversity, and realize synergistic effect of carbon sequestration and soil improvement. The raw materials of the application are environmentally friendly, the preparation process is mild and has strong universality, the application has a slow-release property, can significantly improve soil organic matter content and crop yield, and is suitable for agricultural soil improvement and carbon sequestration.

This invention discloses a soil conditioner for coal mine spoil heaps utilizing coal gangue and its preparation method. The method involves first crushing the coal gangue and then calcining it at high temperature, followed by activation and modification with citric acid to obtain modified coal gangue. This modified coal gangue is then mixed with biochar, humic acid, and polyacrylamide. Next, a self-prepared aqueous solution of a bifunctional polymer for heavy metal chelation and structural stabilization is added. This polymer, obtained by grafting thiol and chloromethyl groups and cross-linking, effectively immobilizes heavy metals and enhances soil aggregate structure. Simultaneously, a self-prepared silicate slow-release and microbial synergistic modifier, composed of sodium silicate and an organic network, is added. This modifier can be premixed with phosphate-solubilizing and nitrogen-fixing bacteria to achieve synergistic promotion of nutrient slow release and microbial activity. Finally, all materials are mixed, granulated, and dried at low temperature to obtain the final product. This invention significantly improves the soil structure of spoil heaps, immobilizes heavy metals, provides long-lasting nutrients, and promotes ecological restoration.

This invention discloses an in-situ analytical method for determining the spatial distribution and occurrence forms of heavy metals in soil. This method can analyze the distribution characteristics of heavy metals in soil in situ, quantify the dynamic changes in the distribution of heavy metals on soil organic-mineral components under the influence of external conditions such as moisture and organic matter input, and the changes in distribution within soil aggregates of different particle sizes. This in-situ analytical method has advantages such as being environmentally friendly, rapid, cost-effective, and non-destructive to soil properties. Compared with traditional continuous extraction methods, it can eliminate cumbersome pretreatment steps, save chemical reagents, shorten testing time, and improve analytical accuracy. It can provide a scientific basis for the precise prevention and control of heavy metals in contaminated soil and risk management, and has broad application prospects.

The present application belongs to the technical field of agricultural waste resource and saline-alkali land improvement, and particularly relates to a straw resource management method for saline-alkali land based on micro-aerobic aeration hydrolysis acidification. The present application is based on the micro-aerobic aeration hydrolysis acidification process and the fermentation performance of the bacterial agent, so that the hydrolysis acidification process of the straw raw material is completed within a few days, and the pH of the generated acidification liquid can be stabilized between 4.0 and 5.5. After the hydrolysis acidification liquid and the straw residue are applied to the saline-alkali soil, the acidification liquid can directly react with the alkaline substances in the soil to rapidly reduce the pH value of the soil; the straw residue can be continuously and slowly decomposed to release nitrogen, phosphorus, potassium and other elements after being applied to the soil, thereby providing long-term nutrient supply for crop growth; the input organic matter can improve the soil aggregate structure and improve the soil water and fertilizer retention capacity, and the functional microorganisms after planting can continuously participate in the soil material circulation, thereby enhancing the soil buffering capacity and the salt-alkali resistance, so that the saline-alkali land management efficiency is high, the neutralization effect is rapid, the improvement effect is comprehensive and long-acting.

This invention discloses a compound microbial agent and its preparation method suitable for alfalfa-maize rotation patterns in sandy loam black soil. The liquid compound microbial agent is prepared by mixing *Cavalleria zedoaria* JMB-20, *Streptomyces* JX-1, and *Bacillus hygroscopicus* JMB-131 bacterial solutions at a wet weight ratio of 1:1.2:1.5. The solid compound microbial agent is prepared by fermenting a mixture of the liquid compound microbial agent with soybean flour and alfalfa straw powder at a mass ratio of 1:10:200. This invention can promote the formation of soil aggregates through the extracellular polysaccharides secreted by *Bacillus hygroscopicus* JMB-131, and simultaneously promote the formation of a bioporous network through maize roots. After field application, it reduces soil bulk density, increases soil porosity and the proportion of water-stable large aggregates, and significantly improves soil physical properties.

The present application relates to a method for improving the carbon and nitrogen content and the aggregate content of newly reclaimed farmland soil by using microalgae, which comprises: applying mixed algal liquid of chlorella and nitrogen-fixing anabaena to the soil. In order to solve the problem of low carbon and nitrogen content and low productivity of newly reclaimed farmland soil, the present application utilizes the ability of chlorella and nitrogen-fixing anabaena to synergistically and efficiently fix carbon dioxide in the air into organic carbon stored in the soil, and at the same time, through the biological nitrogen fixation effect, the nitrogen in the air is converted into nitrogen available to plants, thereby effectively improving the carbon and nitrogen retention capacity of the soil. In addition, the physiological activities of the two microalgae can also synergistically promote the formation of soil aggregates, improve the soil structure, and enhance the water and fertilizer retention capacity of the soil.

The present application relates to the technical field of soil conditioner for improving degraded soil, and provides a multifunctional conditioner for improving degraded acid soil, a preparation method and application thereof, which comprises, by weight percentage, 50-60% of pyrolytic coal porous carbon, 20-30% of alkaline substance, 5-15% of iron source supplement and 1-5% of structure modifier.The pyrolytic coal porous carbon is prepared by pyrolysis of low-rank coal or bituminous coal, and has a multi-level pore structure composed of biological vestige pores and pyrolysis pores; the alkaline substance is selected from at least two of calcium oxide, magnesium oxide, calcium carbonate and hydroxyapatite; the iron source supplement is ferrous sulfate; and the structure modifier is potassium polyacrylate.The present application further provides a preparation method of the multifunctional conditioner, which comprises a pyrolysis preparation step of pyrolytic coal porous carbon and a multi-component mixing step.The multifunctional conditioner can improve the physical and chemical properties of acidified and hardened soil to a certain extent, increase the content of soil aggregates and the nutrient retention capacity, and is suitable for repairing degraded acid soil.