207 results about "Soil aggregate" patented technology

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

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

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

The invention 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.

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

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

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

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

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

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

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

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

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

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

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

The 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 a saline soil Na < + > targeted removal method, in particular to a saline soil Na < + > targeted removal method based on biochar composite material coupling microwave assistance. The invention aims to solve the problems that excessive Na < + > in salinized soil can cause soil aggregate structure collapse, soil hardening and porosity reduction, water and nutrient uptake of plant root systems is severely hindered, and land productivity is sharply declined. The preparation method comprises the following steps: step 1, preparing an amphoteric hydrogel-nano biochar composite material; 2, systematic classification and pretreatment are conducted on the salinized soil; 3, the amphoteric hydrogel-nano biological carbon composite material is put into use according to the grade of the salinized soil; 4, watering is conducted, the soil humidity is maintained to be 20-30%, and the amphoteric hydrogel is promoted to absorb water and expand. The invention belongs to the technical field of soil remediation.

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 embodiment of the invention provides a flushing device for screening soil aggregates, and relates to the field of soil research. Comprising a cylinder body, a fixed cylinder, a pressurizing part, a mounting piece, a water outlet pipeline and a mixing mechanism, the fixed cylinder is mounted in the center of the top end of the cylinder body; the pressurizing part is mounted in the fixed cylinder; the mounting piece is mounted at the eccentric position of the top of the cylinder body; the water outlet pipeline is mounted in the mounting piece; the mixing mechanism is mounted at the bottom end of the pressurizing part and can realize forward and reverse stirring and mixing of materials in the barrel; the pressurizing part comprises a pressurizing cylinder and a piston rod; the pressurizing cylinder is fixedly mounted in the mounting piece; the piston rod is installed in the pressurizing cylinder in an up-down sliding mode. According to the equipment, water flow can be driven by air pressure to spray and screen soil aggregates, whether a water flow channel is smooth or not can be freely controlled, water and an additive can be mixed while pressurization is conducted, and precipitation and separation are avoided.

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 discloses a hydrothermal synthesis method of magnesium-rich silicate and application of the magnesium-rich silicate in acid soil improvement, and belongs to the technical field of soil improvement. According to the method, magnesium chloride, calcium chloride and sodium silicate serve as raw materials, calcium magnesium silicate gel is generated through a hydrothermal reaction, a high-purity product is obtained through freeze drying after impurities are removed through multiple times of washing, and a surfactant can be added to optimize the material morphology and the specific surface area and improve the acid soil effect. The obtained material is hydroxyl calcium magnesium silicate with the molar ratio of calcium to magnesium being (1: 3)-(1: 5), and has a porous nanosheet structure. According to the invention, silicate is released to neutralize the acidity of soil, calcium and magnesium ions are released to fix exchangeable aluminum ions in acid soil, magnesium ions and silicate are released to improve the microbial activity of soil and promote the formation of a soil aggregate structure, and the problems of easy acid regurgitation, soil hardening and the like of a traditional lime acid soil improvement material are solved; the soil conditioner is suitable for rapid acid reduction and long-acting acid control of strongly acidic soil (the pH is more than or equal to 4.0 and less than or equal to 5.0).

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 relates to the field of soil improvement, and discloses a multi-dimensional improved organic fertilizer for saline-alkali soil and a gradient preparation process thereof, the fertilizer is prepared from an organic fermentation substrate, first lignin sulfonate, second lignin sulfonate, elemental sulfur powder, a sulfur autotrophic oxidizing bacterial agent and humic acid; the preparation method adopts a gradient acidification and synergistic fermentation process and comprises the following steps: carrying out thermophilic pre-decomposition on an organic fermentation substrate; adding first sulfonated lignin with low molecular weight and high sulfonation degree to carry out chemical start acidification; and then adding high-molecular-weight second sulfonated lignin, elemental sulfur powder, a sulfur autotrophic oxidizing bacterial agent and humic acid for biological synergistic fermentation to obtain a final product. After the fertilizer is applied to soil, the pH value of the soil and the content of water-soluble sodium ions can be continuously reduced, meanwhile, formation of water-stable aggregates of the soil is promoted through a high-molecular polymer, chemical and physical multi-dimensional improvement on the saline-alkali soil is synchronously achieved, and the effect is remarkable.

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.