85 results about "Dry soil" patented technology

The invention provides a rapid evaluation method and system for the soil fertility level, and relates to the technical field of soil fertility detection.The rapid evaluation method comprises the steps that an original absorbance spectral data curve is obtained by scanning a soil sample, the moisture peak absorbance, the actual peak position wavelength and the moisture synthetic frequency characteristic peak width are extracted, and a spectral data basis is provided; a water-salt optical path coupling factor is calculated, water-salt correction operation is carried out in combination with a volume correction coefficient, a virtual dry soil spectrum data curve is obtained, interference of salt on a water optical path is quantified, and a water background and salt masking are eliminated; constructing a characteristic virtual baseline of the organic matter and the total nitrogen, calculating an integral area to obtain characteristic intensity of the organic matter and the total nitrogen, and providing a physical input variable for quantitative inversion; introducing a water-salt optical path coupling factor to invert the organic matter content and the total nitrogen content, and correcting signal depression caused by salt stress; the effective fertility index is calculated and graded by combining the organic matter content and the total nitrogen content of the soil, and the actual fertilizer supply capacity of the soil is comprehensively evaluated.

The invention provides a soil moisture content calculation method based on an optical fiber temperature measurement technology, which comprises the following steps: acquiring a dry soil heat conductivity coefficient, dry soil density and porosity of a target area and a heat conductivity coefficient and density of water in the target area as soil basic parameters; based on an active heating method, obtaining temperature measurement values of the target area under different radial distances after the target area is heated to a steady state; the soil body basic parameters and the temperature measurement value are substituted into a soil body moisture content formula, and the soil body moisture content of the target area is obtained; wherein the soil mass moisture content formula is pre-constructed based on a soil mass steady-state heat conduction equation and the relationship between the heat conduction coefficient and the soil mass basic parameters, and represents the relationship among the heat conduction coefficient of the soil mass, the temperature and the soil mass moisture content. According to the method, the soil moisture content formula representing the relation among the soil basic parameters, the temperature measurement value and the soil moisture content is constructed, and tedious laboratory operation needed by an existing active heating method is simplified.

The invention belongs to the technical field of building construction, and discloses an ultra-deep foundation pit supporting device and a construction method.The supporting device comprises supporting assemblies, a lifting assembly and a control assembly, at least two sets of supporting assemblies are arranged at intervals in the depth direction of a foundation pit, and a multi-stage temporary supporting system is alternately formed in the foundation pit. Each supporting assembly serves as a formwork frame of the concrete support and temporarily supports the concrete support before the concrete support reaches the formwork removal strength, the lower layer supporting assembly provides temporary side wall supporting below the concrete support at the same time, layer-by-layer continuous excavation is achieved, waiting for the concrete strength is not needed, and the construction waiting time is shortened. According to the construction method, the liftable supporting assemblies are adopted for alternate supporting in the dry soil excavation stage and the underwater excavation stage, so that the foundation pit is in smooth transition among different working conditions. Meanwhile, after the dry soil is excavated to a certain depth, water is injected to the height of a confined water head, water pressure inside and outside the pit is balanced, confined water inrush and pit bottom upheaval are effectively prevented, and safe and continuous construction is achieved through dynamic supporting and cyclic utilization.

A soil moisture gauge for determining a level of moisture in a plant pot has an elongated main body, which has a lower tip and grooves formed in and along the main body. A graduated scale is formed in the main body over a distance corresponding to a maximum expected soil depth when the gauge is inserted into soil contained in the plant pot. When the gauge is inserted into the plant pot and then pulled out of the plant pot, moist soil is retained in the grooves whereas dry soil falls from the grooves, whereby a user can read moist soil depth on the graduated scale. The reading from the soil moisture gauge can be used as an input to a system to adjust a drying profile that indicates to a user a time by which the plant should be watered.

The application belongs to the technical field of cement soil preparation, and particularly relates to a composite cement soil prepared from seawater, nano-silicon dioxide and polyvinyl alcohol fiber and a preparation method thereof, which comprises 63-70% of dry soil powder, 9-10% of Portland cement, 1.8-2.2% of nano-silicon dioxide, 0.6-1.2% of polyvinyl alcohol fiber, 0.2% of dispersant and 16.4-25.4% of seawater. The composite cement soil can not only significantly reduce the dependence on fresh water resources, but also effectively solve the problems of seawater corrosion and deterioration caused by fatigue cracks due to long-term cyclic loading, thereby significantly improving the mechanical strength of the cement soil foundation and prolonging the service life of the cement soil foundation in the coastal environment, and the composite cement soil also has high economic benefits. The synergistic effect of the nano-silicon dioxide and the polyvinyl alcohol fiber significantly enhances the mechanical properties, crack resistance and seawater corrosion resistance of the cement soil, and effectively inhibits the brittle failure of the cement soil, so that the cement soil can be stably applied in the coastal soft soil foundation reinforcement engineering for a long time.

The invention relates to the field of technical analysis and to determining for construction purposes the optimum moisture content and maximum density of natural and man-made soils under static compaction. The essence of the invention consists in compacting a first soil specimen after first determining the initial moisture content thereof and, if necessary, adjusting same by adding water in accordance with recommended values for the given type of soil. A compaction mold cylinder and a lower liner are then placed on 18-20 mm high support stands on a level surface, a weighed amount of the soil under examination is placed in the compaction mold cylinder, the cylinder is positioned on a base plate of a compactor, a top plate of the compactor is brought into contact with the upper end of the cylinder and the compactor is set to a 20 mPA loading mode which is maintained for 5-10 minutes. Loading is ceased, the compaction mold is removed from the compactor, the compacted specimen is extruded and the volume thereof is calculated, the specimen is broken up, a representative sample is taken and weighed on electronic scales with an accuracy of up to 0.01 before being dried and reweighed. On the basis of the data obtained, the damp soil density and the dry soil density are calculated according to given formulae, and the data obtained are entered into a table and noted on a graph. A second soil specimen is compacted, the moisture content of which is increased by 1%, the specimen is placed in the compaction mold, placed under a 20 mPA load in the compactor and held for 5-10 minutes, after which loading is ceased, the compaction mold is removed from the compactor, the compacted specimen is extruded, the volume thereof is calculated, the specimen is broken up, a representative sample is taken and weighed on electronic scales with an accuracy of up to 0.01 before being dried and reweighed, the moisture content of the soil and the dry soil density are calculated and the d

The utility model relates to the technical field of soil treatment and drying, and discloses a drying machine for soil treatment samples, which comprises a drying box, three hot-air blowers are arranged at the top of the drying box, filter screens are arranged at the input ends of the three hot-air blowers, a moving plate is connected to the inside of the drying box in a sliding manner, and a baffle is fixedly mounted on the outer wall of the moving plate. An arrow plate is arranged on the outer wall of the rotating disc, and a plurality of air outlet holes are formed in the outer wall of the drying box. According to the drying machine for the soil treatment sample, when the soil remediation sample needs to be dried, a handle is moved to drive a moving plate to move, soil to be dried is placed on a base plate, an air heater is started, a motor drives a rotating shaft to rotate, a knocking rod is driven to rotate, and a beating rod drives the base plate to move upwards; and the base plate moves downwards, the base plate vibrates, the effect of throwing up the soil through vibration can be achieved, the air heater can dry the soil, and the rapid and uniform drying effect is achieved.

The invention discloses a filtration-increasing composite curing agent and application thereof in a solid-filtration combined technology, and belongs to the technical field of soft soil foundation treatment in civil engineering and traffic transportation engineering. The filtration-increasing composite curing agent is composed of a gelling agent, a retarder and a hydrophobic material, and is added into the sludge for curing the sludge; the sludge comprises sludge dry soil and water, and the water content in the sludge is 70-80%; the doping amount of the gelling agent is 6%-12% of the mass of the sludge, the doping amount of the retarder is 0.05%-0.2% of the mass of the gelling agent, and the doping amount of the hydrophobic material is 0.05%-0.2% of the mass of the dry sludge soil. According to the invention, a solid-filtration combined technology is introduced into sludge treatment, and a composite curing agent with a filtration increasing characteristic is adopted, so that the purposes of further enhancing the vacuum dehydration performance of the solidified soil, improving the solid-filtration treatment effect and reducing the cost can be achieved, and the solid-filtration combined technology is optimized.

The invention discloses a soil organic carbon mineralization rate determination method, and relates to the technical field of soil carbon circulation and greenhouse gas monitoring. The method comprises the following steps: carrying out hydrochloric acid back titration on an absorption liquid by adopting an automatic potentiometric titration method, converting to obtain the mass of a carbon element contained in carbon dioxide, calculating the mineralization rate by combining the dry soil weight and the culture interval, and finally subtracting an inactivation control value to obtain the organic carbon mineralization rate driven by pure microorganisms. A thin-wall stainless steel undisturbed soil drill matched with the inner diameter of a culture bottle is used for collecting soil columns in a layered manner, PVC liner tube sealing and constant-temperature transportation are matched, and a cold chamber for simulating the in-situ temperature is combined, so that the in-situ structure and the microbial habitat of the loose high-water-content peat soil are reserved to the maximum extent, and damage of traditional pretreatment to soil pores and microbial communities is avoided.

The invention discloses an intelligent weeding robot for dry soil crops, and relates to the technical field of agricultural intelligent equipment. According to the robot, a solution integrating edge intelligent vision and self-adaptive control is disclosed for the requirements for accuracy and adaptability of weeding operation in a dry soil complex environment. The robot comprises a moving trolley, a weeding device, a weed recognition control module and a power battery, and the control module automatically controls the moving trolley to walk forwards according to a planned path and position information provided by a satellite navigation module and receives dry soil crop and weed photos shot by a camera in real time. The main control unit intelligently recognizes coordinate information of weeds and crops relative to the moving trolley and timely controls the laser weeding device or the mechanical weeding device to efficiently remove the weeds. The problems that a traditional weeding mode is low in efficiency and high in seedling damage rate are solved, and intelligent, environment-friendly and efficient weeding is achieved.

The application provides an anti-skid forklift pedal, belonging to the technical field of forklift accessories. The anti-skid forklift pedal comprises a standing pedal body, a connecting plate and a soil cleaning assembly. The standing pedal body is provided with longitudinal anti-skid groove, and the standing pedal body between the anti-skid grooves is provided with anti-skid protrusions. The limiting strip plate is fixed on the outer side of the standing pedal body, the pull strip plate is arranged below the limiting strip plate and slides in the anti-skid groove, the horizontal strip plate is connected with the outer end of the pull strip plate, the pull block is arranged on the bottom of the horizontal strip plate, and the end block is arranged above the end of the pull strip plate away from the horizontal strip plate. The dry soil covered above the pull strip plate in the anti-skid groove is separated from the standing pedal body by pulling the limiting strip plate outward to drive the pull strip plate to move along the anti-skid groove, so that the soil on the standing pedal body can be quickly cleaned, and the standing pedal body has good anti-skid effect in the later period.

This invention relates to the field of agricultural environment and soil fertilizer technology, and in particular to a method for increasing paddy field yield and reducing N2O emissions by regulating the application rate of zero-valent iron. The method includes the following steps: at the early tillering stage of rice, zero-valent iron is mixed with tillering fertilizer and applied to the paddy field soil; the application rate of zero-valent iron is 20-50 mg / kg (dry soil basis). ‑1 The method involves applying booting fertilizer to the paddy soil during the early booting stage of rice, and irrigating throughout the entire rice growth cycle. This invention, by applying an appropriate amount of zero-valent iron in a single application on top of conventional fertilizer application, can synergistically achieve greenhouse gas emission reduction and increased grain yield, providing a feasible path for green production in paddy fields.

The invention relates to the technical field of intelligent construction of tunnel engineering, in particular to an intelligent detection and identification method for flow plasticity types of shield muck. The method comprises the steps that firstly, an industrial camera with environmental adaptability is used for collecting an image of slag at a slag outlet of the shield tunneling machine; then, preprocessing including Retinex illumination enhancement, geometric correction and denoising is carried out on the image; inputting the processed image into a trained YOLOv8-CBAM model for analysis and reasoning, wherein the model enhances the ability of extracting muck textures and key features by embedding a CBAM attention mechanism; the model outputs three types of muck states of dry soil, suitable soil and rare earth and confidence degrees thereof; and finally, performing real-time linkage adjustment on construction parameters such as the injection amount and the propelling speed of the modifier according to an identification result to form intelligent closed-loop control. According to the invention, the accuracy and real-time performance of muck state identification are improved, the dependence on artificial experience is reduced, and the safety, high efficiency and continuity of shield construction are effectively guaranteed.

The application provides a soil fertility level rapid evaluation method and system, relates to the soil fertility detection technical field, and provides the spectrum data basis through scanning soil samples to obtain the original absorbance spectrum data curve and extracts the water peak value absorbance, the actual peak wavelength and the water combined frequency characteristic peak width; calculates the water salt optical path coupling factor and carries out water salt correction operation to obtain the virtual dry soil spectrum data curve in combination with the volume correction coefficient, quantifies the interference of the salt on the water optical path and eliminates the water background and the salt masking; the characteristic virtual baseline of organic matter and total nitrogen is constructed, and the integral area is calculated to obtain the characteristic intensity of organic matter and total nitrogen, so that physical input variables are provided for quantitative inversion; the water salt optical path coupling factor is introduced to invert the organic matter content and the total nitrogen content, the signal suppression caused by the salt stress is corrected; the effective fertility index is calculated in combination with the organic matter content and the soil total nitrogen content, and is classified, so that the comprehensive evaluation of the actual fertilization capacity of the soil is realized.

The invention provides application and a method of earthworm combined iron-based nano material in remediation of soil micro-plastics. The method comprises the steps of providing to-be-remediated soil; wherein the mass concentration of the micro-plastic in the soil to be remediated is 2.8 to 3.2 g / kg; the number of earthworms in the to-be-remediated soil is 7-8 / KG dry soil; an iron-based nanometer material is added into the soil to be remediated; the mass concentration of the iron-based nano material in the soil is 0.05 to 0.5 percent. Through the synergistic effect of the iron-based nano material and earthworms-microorganisms, green and sustainable treatment of degradation-resistant micro-plastic PE or PP pollution in soil can be achieved.

This invention discloses a non-destructive method for determining the dielectric constant of undisturbed permafrost, belonging to the technical field of permafrost dielectric property measurement. The method includes: experimentally measuring the dielectric constants of single-phase dry soil, pure water, and ice in undisturbed permafrost; non-destructively obtaining the porosity of undisturbed permafrost specimens; establishing calculation formulas for the volume ratios of ice, unfrozen water, and soil with respect to unfrozen water content and porosity, respectively; preparing a series of frozen specimens with different porosity ratios using thawed soil samples from the same source as the undisturbed permafrost; experimentally measuring the unfrozen water content at different sub-zero temperatures, obtaining a bivariate prediction model through quadratic fitting, and outputting the unfrozen water content corresponding to any temperature and porosity, thereby obtaining the volume ratios of ice, unfrozen water, and soil; and obtaining the overall dielectric constant of the same type of permafrost in the same region at a fixed temperature using a three-phase dielectric mixing model or a deep neural network model. This invention improves testing accuracy without damaging the permafrost structure.

The invention relates to the technical field of civil engineering detection, and discloses a dry density-based fine-grained soil compression modulus rapid determination method, which comprises the following steps: carrying out sample preparation and standardization on target fine-grained soil according to fixed dry soil mass and a unified initial height value; executing a limit compression test on the sample, and collecting a load-displacement data sequence until the curve slope is sharply increased and is close to be vertical; processing the load-displacement data sequence, and constructing a dry density-compression modulus reference relation model of the target fine-grained soil; measuring the on-site dry density of the on-site to-be-measured compacted soil body which is the same as the target fine-grained soil; and substituting the field dry density into the reference relation model, and calculating and determining the field compression modulus. According to the method, the dry density-compression modulus reference model of the soil is provided through a one-way extreme compaction experiment and digital model construction, and rapid and accurate measurement of the compression modulus is realized.

The invention relates to the technical field of water conservancy projects, in particular to water conservancy project dam reinforcing equipment which comprises a plurality of reinforcing mechanisms connected through bolts, a drainage mechanism is arranged in the middle of the lower portion of a small number of reinforcing mechanisms, a plurality of isolation mechanisms are arranged on the periphery of the drainage mechanism in an array mode, and each reinforcing mechanism comprises a reinforcing frame. An arranged moisture absorption assembly efficiently absorbs excessive moisture through high-density sponge and a hydrophilic thin copper pipe, a continuous dehumidification channel is formed in cooperation with a liquid pumping device, a drainage mechanism can accurately supplement water to dry soil, soil of different depths can be adapted through adjustment of a piston plate, permeation damage caused by excessive moisture or cracking caused by insufficient moisture is avoided, and the moisture absorption effect is good. The dam body soil is ensured to be in a stable state all the time, the fine sand of the isolation frame can prevent clay from caking to block the moisture absorption assembly, a breathing space is reserved for the high-density sponge, the continuous water absorption efficiency is guaranteed, and a reinforcing unit with a drainage mechanism and an isolation mechanism can be flexibly arranged according to the requirements of the dam.

The invention discloses an intelligent electromagnetic compaction degree measuring cutting ring and a using method, and particularly relates to the field of road engineering, the intelligent electromagnetic compaction degree measuring cutting ring comprises a fixing frame, the right side of the top of the fixing frame is fixedly connected with a supporting frame, the bottom of the supporting frame is provided with a soil sampling mechanism, and the soil sampling mechanism comprises a soil sampling air cylinder fixedly connected to the bottom of the supporting frame. Downward movement of the cutting ring body is achieved through the movable air cylinder so that soil sampling operation can be completed, then the carrying mechanism drives the weighing device to move rightwards, in the process, weighing of the weighing mechanism on a wet soil sample is completed, and then the carrying mechanism drives the wet soil sample to move rightwards into the drying device to be dried. After drying, the carrying mechanism drives the dry soil sample to the position above the weighing device, the weighing device carries out secondary weighing, obtained data is calculated and processed through a computer, then compaction degree data of the soil sample is obtained, the effects of cutting ring soil taking, weighing and drying mechanization are achieved, and the detection efficiency of the soil sample is improved.

The present application relates to the field of dredging treatment, and discloses a sludge screening integrated treatment equipment and a treatment method. In the present application, movable support rods are welded between the outer surfaces of a filter pressing main body, a plurality of filter plates are movably connected between the upper surfaces of the movable support rods, filter frames are movably connected between the upper surfaces of the movable support rods corresponding to each filter plate, a hydraulic machine is fixedly connected between the outer surfaces of the filter pressing main body away from the filter plates, a sludge filling pipe is arranged on the outer surface of the upper side of the filter plate, a filtrate pipe is arranged on the outer surface of the filter plate corresponding to the hydraulic machine, and a guide-out pipe is fixedly connected to the outer surface of one side of a liquid collecting box. In use, the filter plate and the filter frame jointly constitute a group of filter chambers, the hydraulic machine cooperates with filter cloth to jointly form a filter pressing device main body through extrusion, the sludge residue is introduced into the sludge filling pipe until the filter chamber is filled, the filtrate passes through the filter cloth and the filter plate, the filtered tail water is filtered out through the filtrate pipe and then dripped into the liquid collecting box to be discharged from the guide-out pipe, and the sludge treated by the filter chamber is pressed into dry soil.

The invention belongs to the technical field of geotechnical engineering, and particularly discloses a method for synergistically improving roadbed loess in a seasonal frozen region, a product and application. The method comprises the following steps: sequentially carrying out crushing, air drying, powder sieving and drying treatment on roadbed undisturbed loess in a seasonal frozen area to obtain standby dry soil; mixing the standby dry soil with modified glass fibers accounting for 3%-11% of the mass of the standby dry soil to obtain a mixed soil material; xanthan gum accounting for 0.50%-2.00% of the mass of the mixed soil material is added into the mixed soil material, and the mixture soil material is obtained through uniform mixing; standing the mixture soil material, performing circulating freezing and thawing, and performing maintenance to obtain improved soil; and analyzing the mechanical properties of the roadbed loess under the traffic load effect based on the improved soil. The dynamic strength, the freeze-thaw resistance stability and the long-term service performance of the roadbed loess in the seasonal frozen area can be remarkably improved.

The embodiment of the utility model discloses an injection type covering device for soil heavy metal remediation, which comprises a bottom plate, a medicament storage bin and a soil storage bin are respectively mounted above the bottom plate, an injection mechanism is mounted at the bottom of the medicament storage bin, a connecting rod is mounted on the outer surface of the injection mechanism, and a soil storage bin is mounted on the soil storage bin. A supporting rod penetrates through the interior of the end, close to the injection mechanism, of the connecting rod, a discharging mechanism is installed at the bottom of the soil storage bin and comprises a discharging pipe and a spiral shaft, the discharging mechanism synchronously conveys dried soil while a remediation agent is injected into the injection pipe, the agent injection link and the covering link are combined into one procedure, and therefore the remediation efficiency is improved. The operation procedures are combined, time cost is saved, the agent exposure time is effectively shortened, the soil flowing direction is accurately controlled through the distribution disc and the protruding strips, it is guaranteed that the soil comprehensively and evenly covers the surface of an injection area, the risks of agent exposure, volatilization and the like are reduced, and the remediation effect stability is improved.

The invention discloses application of a rice OsME5 gene and a molecular marker thereof in regulation and control of rice dry direct seeding seedling emergence, the nucleotide sequence of the rice OsME5 gene is as shown in SEQ ID No.1, and the coding sequence of OsME5 protein coded by the rice gene OsME5 is as shown in SEQ ID No.2; the method comprises the following steps: knocking out an OsME5 gene by adopting a CRISPR / Cas9 method, and designing a molecular marker by utilizing natural nucleotide polymorphism (SNP) of an OsME5 promoter region SEQ ID No: 3; the OsME5 has a key SNP OsME5-578G / A at 578 base pairs on the upstream of an initiation codon, the seedling emergence ability of the germplasm carrying the OsME5-578G is relatively strong when the germplasm carrying the OsME5-578G is covered with soil and the seedling emergence ability of the germplasm carrying the OsME5-578A is relatively weak when the germplasm carrying the OsME5-578G is covered with The OsME5 gene disclosed by the invention can be applied to the field of agriculture, and a candidate gene is provided for improving the seedling emergence capability of rice soil-covering dry direct seeding.

This invention provides a method, device, terminal, and storage medium for soil Munsell color discrimination based on high-resolution multispectral remote sensing. The invention acquires multispectral remote sensing images and metadata, performs radiometric calibration and atmospheric correction on the images to obtain surface reflectance; generates a quality mask including clouds, cloud shadows, shading, water bodies, and anomalous pixels, and removes unusable pixels; estimates soil purity by combining a bare soil candidate mask and gates mixed pixels; performs geometric and BRDF normalization on bare soil candidate pixels, and constructs soil state indicators from SWIR bands; establishes a mapping from reflectance to CIE tristimulus values ​​based on the sensor spectral response and converts it to CIELAB; obtains the equivalent color of dry soil by segmental compensation according to the soil state indicators; performs color difference matching with the Munsell color library and calculates the confidence level; outputs an undecidable condition and cause code when the confidence level is low, achieving stable discrimination and reliable output under complex observation conditions.

This invention relates to the field of steel pipe pile technology and discloses a prestressed steel pipe concrete pile and its usage method, including an overall external mechanism, which also includes an overall chassis. The invention is designed with a bottom fixing mechanism. The soil characteristics from the soil surface to 40 cm underground are relatively dry, fine and have poor seismic resistance. The soil characteristics below 40 cm are moist, soft and have poor stability. According to the normal construction process of small villas, the foundation should be buried to a depth of 100 cm. When the foundation of this invention is being fixed, the bottom fixing mechanism extends outward due to soil resistance and stores a portion of the fine and dry surface soil inside the fixing column. After going deeper, it mixes with the moister soil underground, making the equipment more stable. It takes advantage of the large temperature difference between day and night in suburban areas, the poor thermal conductivity of the outer wall of the overall stone slab, and the low temperature. The overall condensation plate is a metal product with high thermal conductivity, which absorbs the surrounding temperature and prevents condensation from occurring inside.

The utility model relates to the field of drying and screening devices, and discloses a rapid soil drying and screening device for soil detection, which comprises a bottom box, a screening mechanism is arranged on the upper surface of the bottom box, the screening mechanism comprises a vibration motor fixedly connected to the rear end of the inner wall of the bottom box, and the output end of the vibration motor is fixedly connected with a vibration disc. The outer wall of the vibration disc is rotationally connected with a first vibration shaft, and the end, away from the vibration disc, of the first vibration shaft is rotationally connected with a second vibration shaft. According to the soil drying device, a drying cylinder can be opened through a drying cover on the drying mechanism, a first motor is started when soil is put into the drying cylinder, a drying stirring shaft can stir the soil in the drying cylinder, the inner wall of the drying cylinder can be heated through an electric heating wire layer, and drying of the soil can be accelerated; and then a valve is opened, the dried soil sample can be fed into the screening mechanism for screening operation, and the mechanism can effectively improve the drying efficiency of the equipment.

The invention discloses a bacillus strain NJAU-N3 and an application of the bacillus strain NJAU-N3. The invention relates to bacillus subtilis NJAU-N3, which is classified and named as bacillus cereus, and is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation date is August 18, 2025, and the preservation number is CGMCC No.35652. The bacillus subtilis NJAU-N3 is named as bacillus cereus, and is preserved in the China General Microbiological Culture Collection Center (CGMCC). The invention discloses the capability of the compound in soil nitrogen fixation and soybean growth promotion. The invention further discloses a microbial inoculum prepared from the bacillus subtilis and application of the microbial inoculum in soil nitrogen fixation and soybean growth promotion. The strain provided by the invention has wide temperature and drought adaptability, can play the functions of soil nitrogen fixation and soybean growth promotion in low-temperature and drought soil, is suitable for planting of crops such as soybeans in northeast semi-arid windy desert areas, and has good popularization and application values.

The application belongs to the technical field of soil remediation and improvement, and particularly relates to a soil improvement integrated equipment for grassland ecological remediation, which comprises a soil conveyor, a horizontal conveyor, a dry stirring structure, a soil improvement box, a flow guide structure and a cylinder type rubbing structure. The cylinder type rubbing structure comprises a guide cylinder and a main shaft rotatably connected in the guide cylinder. A plurality of meshes are formed in the bottom of the guide cylinder. A plurality of springs are mounted on the main shaft. A rolling ball is fixedly connected to the free end of each spring. The rolling ball leaves a gap with the inner wall of the guide cylinder. A rubber sleeve is fixedly sleeved on the rolling ball. In the application, the original soil is dried before being crushed, so that the water content of the soil is reduced and the soil viscosity is reduced. The rubber sleeve is lifted by the rolling ball and rubs and crushes the dried soil, so that the effect of rubbing and crushing the dried soil by hand is simulated.

The present application relates to the technical field of drag suction ship, and specifically provides a drag suction ship head self-adaptive control method, system, device and medium based on soil identification, comprising: collecting oil cylinder state, rake head posture, mud parameters and ship speed data in real time through a multi-source sensor network; decoupling effective cutting force from the oil cylinder pressure based on a dynamics model; calculating instantaneous power according to the effective cutting force and the speed, calculating dry soil production according to the mud flow rate and concentration, and then calculating a real-time specific energy index; comparing the specific energy index with a preset threshold value, and comprehensively determining the soil type in combination with the fluctuation trend of the effective cutting force; and adaptively adjusting the dredging parameters according to the soil type. The present application can accurately identify soil in real time and adaptively match the dredging process, significantly improving the operation efficiency and equipment safety under complex geological conditions.

The invention relates to a preparation method and system of a soil-like red mud-based dry soil material. The method comprises the following steps: dehydrating and crushing to obtain primary particles of which the particle size is less than or equal to 10mm, measuring the water content, the flow resistance and the particle size of the primary particles on line, and drying / moisturizing, dispersing / reducing and refining / refluxing the particles in a closed-loop manner according to an on-line measurement result, so that three indexes of the particles respectively fall into windows of 20-25%, 300-500mPa. S, 30-35% of coarseness and 15-25% of fineness; then performing multi-stage screening to obtain coarse, medium and fine fractions, and mixing the coarse, medium and fine fractions according to a preset proportion to obtain the density of 1.2-1.5 g / cm < 3 > and the porosity gt; 30% of the soil-like red mud-based dry soil material can replace natural soil without chemical addition to be used for building ceramics, cement or mine remediation. According to the embodiment of the invention, single moisture control is replaced by closed-loop cooperation of three indexes of moisture content, flow resistance and granularity for the first time, the bottleneck that in the prior art, grain composition is disordered and the form is unstable is broken through, and conversion from wastes to soil-like particle substitute materials is completed.