121 results about "Soil porosity" patented technology

The invention provides an intelligent irrigation control method and system for a high-standard farmland. The method comprises the following steps: acquiring crop canopy image data and farmland terrain elevation data of different crop planting areas in the high-standard farmland; determining a crop growth stage based on morphological characteristic data in the crop canopy image data, and constructing a soil hydrodynamic simulation model according to a root distribution depth interval and a theoretical water absorption rate coefficient corresponding to the crop growth stage; and based on the farmland terrain elevation data and the soil porosity parameter, generating a soil moisture migration parameter by using a soil hydrodynamic simulation model, generating a pipe network pressure regulation and control instruction in combination with the soil moisture migration parameter and a preset irrigation strategy, and adjusting the water outlet pressure distribution of the intelligent irrigation pipe network according to the pipe network pressure regulation and control instruction. Generating an irrigation control instruction; accurate space-time matching of irrigation of the multi-crop rotation area is achieved, the water utilization efficiency is improved, and the problem of irrigation uniformity at the terrain difference and the rotation boundary is solved.

The invention discloses a soil three-dimensional pore structure feature distribution rule comprehensive index construction method. Relates to the technical field of crossing of soil science and computer technology, in particular to the technical field of analyzing soil three-dimensional pore structure feature distribution rules by constructing comprehensive indexes. According to the method, the three-dimensional pore structure feature distribution rule index is constructed based on the three-dimensional Minkowski functional estimation value, and key parameters such as soil porosity, specific surface area and connectivity can be comprehensively and visually reflected. The method comprises the following steps: obtaining a binarized image and carrying out the preprocessing of the binarized image; cutting the pixel matrix data set to obtain a representative basic volume data set of the soil pore structure; the Minkowski functional estimation value in the three-dimensional space is calculated; analyzing Minkowski functional estimation values on the basis of skewness and kurtosis characteristics in statistics; and based on the pore structure distribution characteristic parameters of different soil types, constructing a three-dimensional pore structure characteristic distribution rule index.

The invention belongs to the technical field of smart agriculture, and relates to a smart agriculture environment data real-time analysis method based on Internet of Things, which comprises the following steps: acquiring soil parameters of a first detection layer and a second detection layer of a farmland soil layer, and calculating a soil porosity compensation coefficient by combining a pressure difference value between the two layers, a soil convection measurement value is generated by combining the temperature difference value between the two layers; matching a preset growth period characteristic database to generate a growth period fingerprint code; constructing a dynamic data matrix containing the temperature gradient and the humidity change rate, giving a weighting coefficient to the time in combination with the growth period fingerprint code, and generating a smooth trend fluctuation curve; generating a three-dimensional imbalance index with economic weight adjustment; and selecting an irrigation mode according to the three-dimensional imbalance index hierarchy, and dynamically adjusting the communication priority of the equipment. According to the method, a hard coding decision-making mechanism which easily ignores market price factors and economic weights is solved, so that a resource allocation strategy deviates from actual benefit requirements.

The invention provides a soil conditioner for improving soil hardening and a preparation method thereof, and relates to the technical field of soil conditioning. The soil conditioner is prepared by combining nano silicon dioxide, a straw retting material, a straw composite fermentation material, biochar, a water-retaining agent and modified starch. The straw composite fermented material is prepared by the following steps: crushing straws, mixing with sweet water, stirring, drying, carrying out microwave treatment, mixing with bacillus thuringiensis, fermenting, sterilizing, subsequently adding a composite microbial agent of bacillus subtilis, trichoderma and bacillus mucilaginosus, continuously fermenting, and drying. The modified starch is prepared by semi-gelatinizing corn starch and then carrying out microwave drying and shaping. According to the present invention, the defects in the prior art are overcome, the soil hardening phenomenon can be rapidly improved with the small addition amount, the soil porosity is increased, the activity and the diversity of the soil microorganisms are ensured, and the soil fertility is improved.

The invention provides modified polysiloxane and also provides a preparation method of the modified polysiloxane, and the preparation method comprises the following steps: mixing low-hydrogen-content silicone oil with allyl alcohol polyether and allyl glycidyl ether, heating, adding a catalyst, and carrying out an addition reaction to obtain the modified polysiloxane. The invention also provides an application of the modified polysiloxane as a soil loosening agent, and the modified polysiloxane is used for reducing the soil bulk density and / or increasing the soil porosity, and is also used for improving the water absorption and / or water retention of the soil. By applying the modified polysiloxane soil loosening agent disclosed by the invention, the soil bulk density is effectively reduced, the soil compactness is reduced, and the soil porosity is improved, so that the soil hardening is remarkably improved, the crop growth is promoted, and the modified polysiloxane soil loosening agent is green and safe and has important economic value and environmental significance.

The invention relates to the field of agricultural engineering and crop cultivation, and discloses a cultivation method for improving waterlogging resistance of sugarcane, comprising the following steps: S1, acquiring field data through three-dimensional terrain scanning and soil parameter analysis, and dividing into a high-risk area, a medium-risk area and a low-risk area; s2, a ventilation column device is arranged in the high-risk area, and the gas injection rate is dynamically distributed according to the area risk level; s3, porous material filling and mechanical soil loosening are carried out; s4, constructing an optimization model, and dynamically adjusting the ventilation rate and the drainage rate; s5, according to the output result of the optimization model, ventilation and drainage equipment in different areas are dynamically regulated and controlled; s6, evaluating the porosity and the water content of the soil again after waterlogging is finished, and performing soil covering and supplementary ventilation on the damaged area. Through combination of soil pore optimization and dynamic control, the air permeability and drainage capacity of soil are improved, and the root zone environment is more suitable for waterlogging stress.

The utility model provides a fertilizing device for improving barren soil, and relates to the technical field of agricultural machinery. The soil crushing assembly is connected with one end of the first supporting base; the fertilizing assembly is connected with the other end of the first supporting base; one end of the moving assembly is fixedly connected with the bottom face of the first supporting base. Original barren soil is cut and smashed through the soil smashing assembly, the porosity of the soil is increased, the ventilation condition of the soil is improved, growth and development of soil organisms are facilitated, fertilizer is applied to the soil through the fertilizer applying assembly, fertilizer can be applied to the interior of the soil, and the soil can be converted into soil organic matter; the soil porosity is further increased; and the soil ventilation condition is improved.

The invention discloses novel efficient biological cultivation equipment for black land based on earthworm driven inoculation, and designs novel pure-electric-driven unmanned earthworm complex large-field throwing equipment in order to solve the problem that existing throwing machinery for earthworm complexes is lacked. According to the device, mixed liquid acts on materials at the bottom of the material box in a spraying mode, the overhead phenomenon formed in the material box due to adhesion of the materials is avoided, and it is guaranteed that the materials are continuously and fully filled into the discharging mechanism; according to the feeding device with the earthworm feeding hopper and the straw mixture feeding hopper as main components, accurate feeding is achieved under the condition that the reasonable sowing amount is controlled, and the feeding distance and the feeding amount can be controlled according to actual needs. According to the design, the requirement of intelligent agricultural machinery is met, quantitative and damage-free putting of the earthworm complex is met, and a feasible solution is provided for solving the problems of insufficient soil porosity and soil hardening.

A computer-assisted method to monitor soil porosity at a field study site using a portable apparatus, the method including: acquiring a soil sample using a first container; recording a first measurement of a mass and a volume of the soil sample; adding the soil sample to a second container until the soil sample is added in entirety, wherein the second container is pre-filled with a fluid medium, wherein the soil sample is added to the second container without causing soil clustering, and wherein a second measurement of a mass of the second container with the fluid medium is recorded; recording a third measurement of a mass of the second container with the soil sample fully immersed in the fluid medium; calculating a porosity of the soil sample based on the first, second, and third measurements; and providing, at the field study site, the calculated porosity of the soil sample.

The invention belongs to the technical field of loess humidification deformation measurement, and provides a slope protection plant selection method and system based on rainfall infiltration simulation analysis, a rainfall capacity and infiltration depth relational expression is obtained through a simulation test, and a structure correction coefficient is introduced into the relational expression; the structure correction coefficient is a ratio of the infiltration depth determined by considering the void ratio of the soil body to the infiltration depth determined by not considering the void ratio of the soil body under the same infiltration depth; when the slope protection plants are selected, the infiltration depth, the infiltration lower interface and the like can be directly and quickly determined according to the rainfall and the relational expression of the rainfall and the infiltration depth, and powerful reference is provided for selection of the protection plants; the introduction of the structure correction coefficient realizes the consideration of the water absorption of soil particles through a simple calculation method, improves the accuracy of the relationship between the rainfall and the infiltration depth, and is beneficial to the accurate determination of the type of the protection plant.

The invention provides an ecological slope protection composite structure bearing capacity analysis method which comprises the following steps: collecting the root penetration depth, rhizome diameter, soil porosity and pine pile lateral soil pressure of an aquatic plant through a root growth monitor and a soil pressure sensor, and identifying the change rule of data at different time points; extracting a specific numerical range of root system density change; according to the extracted root density change value range, the strength degree of enhanced cementation of aquatic plant root exudates is identified, the improvement effect of the soil particle cementation degree on the shear strength of the soil body around the pine pile is evaluated, and the speed change rate of rhizome thickening and expanding is determined; according to the obtained optimal combination scheme of the pine pile-aquatic plant composite bearing system, the accuracy of slope protection instability risk point correction is evaluated, and a correction coefficient and a correction period for slope protection bearing capacity calculation are obtained.

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 relates to the technical field of planting and cultivation, in particular to a double-high-yield cross composite planting method for alfalfa and ryegrass in dry land. The method comprises the following steps that alfalfa and perennial ryegrass are sown in drill, and an alfalfa planting strip and a perennial ryegrass planting strip are perpendicular to each other; wherein the medicago sativa planting strips and the perennial ryegrass planting strips comprise wide rows and narrow rows, and the ratio of the number of the wide rows to the number of the narrow rows is (3-5): 1. Compared with conventional intercropping, the total soil moisture content, the soil bulk density, the soil porosity, the soil saturated water and the field moisture capacity of planting with the method are all increased, and the total yield is also increased by 20.89% compared with that of conventional intercropping. By means of the planting method, the water binding capacity of soil can be improved, water competition among plants is relieved, and water-saving intercropping of double high yields of alfalfa and perennial ryegrass in the dry land is achieved.

The invention discloses a corn drought resistance identification test device and method, and belongs to the field of drought resistance identification. A corn drought resistance identification test device comprises a test box, the interior of the test box is sequentially divided into a low-concentration bin, a medium-concentration bin, a high-concentration bin and a contrast bin through telescopic sleeve plates, and the corn drought resistance identification test device further comprises an agent box fixed to the top of the test box; through the air pressure effect generated by reciprocating motion of the piston plate in the piston box, the liquid dropping speed of penetrating fluid is increased firstly, the situation that the inner wall of a pipeline is attached and blocked is avoided, and liquid circulation is ensured; secondly, in the liquid dropping process, atomizing blades are driven to rotate, so that liquid drops are converted into a finer atomized state, and further fall in a larger range and in a uniform state, the accuracy of a test result is improved, meanwhile, the situation that soil is hardened due to large liquid drops is avoided, the porosity and the air permeability of the soil are ensured, and the soil quality is improved. And the accuracy of a test result is improved.

Disclosed in the present invention are a high-pressure jet grouting pile body leakage point detection device and detection method, and an operation method. The detection method comprises: when a high-pressure jet grouting pile starts to construct, as the pile body goes deep into soil, periodically acquiring the soil porosity, the soil particle distribution uniformity, the soil permeability, the soil moisture content, the soil particle size, and the area of the pore structure of the soil, and calculating the impermeability of the soil; acquiring the pore structure of a pile body material, the permeability of the pile body material, the compressive strength of the pile body material, and the corrosion degree of the surface of the pile body, and calculating the impermeability of the pile body material; and acquiring the diameter of the pile body, the length of the pile body, the water flow rate during construction of the high-pressure jet grouting pile, the construction speed of the high-pressure jet grouting pile, a change value of pressure around the pile body as the pile body going deep into the soil, the construction time, the pH value of the soil, the temperature of the soil, and the inclination angle of the pile body, configuring a pile body leakage point detection model on the basis of the impermeability of the soil and the impermeability of the pile body material, and calculating the index of occurrence of the leakage point of the pile body in each period, thus detecting the leakage point of the pile body.

The invention discloses a garden branch decomposition inoculant and a preparation method thereof, and relates to the technical field of garden waste treatment.The garden branch decomposition inoculant is composed of microbial strains, organic matter, inorganic nutrients and adjuvants.The garden branch decomposition inoculant shows excellent performance advantages through unique component combination, and the preparation method is simple. A plurality of microbial strains have a synergistic effect, the bacillus subtilis firstly decomposes protein and starch, the bacillus licheniformis inhibits harmful microorganisms and assists cellulose decomposition, and the sporotrichum thermophilus focuses on overcoming cellulose and lignin, so that the decomposition rate of the branches is greatly increased, and the decomposition rate of the branches is increased. Organic substances and inorganic nutrients provide sufficient and balanced nutrient sources for microorganisms and promote vigorous growth and reproduction of the microorganisms, enzyme and vitamin B are added to further enhance the activity of the microorganisms and accelerate the decomposition process, and after the decomposition agent is applied to soil, the soil structure can be remarkably improved, the soil porosity can be increased, and the soil quality can be improved. The air permeability of the soil is better.

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

The invention discloses a saline-alkali soil conditioner and a preparation method thereof, and belongs to the technical field of soil conditioners, hydrothermal carbon, ardealite and microbial flora are used as main raw materials and are respectively treated to jointly prepare the conditioner, and the ardealite, the hydrothermal carbon and the microbial flora jointly act to quickly reduce the salinity and alkalinity of soil, so that the saline-alkali soil conditioner has a good application prospect. Meanwhile, the hydrothermal carbon continuously improves physicochemical properties such as soil porosity, fertilizer and water retention capacity and the like, so that the physicochemical properties of the soil are comprehensively improved while rapid treatment of the saline-alkali soil is realized; and the modifier is prepared by compounding the phosphogypsum and the hydrothermal carbon, so that the density of the modifier can be improved, the problem that the acting effect of the modifier is reduced due to the fact that the modifier easily floats upwards due to low density when single hydrothermal carbon is applied is solved, and the prepared modifier has a good application prospect in the technical field of saline-alkali soil improvement.

The invention discloses a beet soil treatment device convenient for fertilizing, and relates to the technical field of soil treatment.The beet soil treatment device comprises a soil turning assembly, the soil turning assembly comprises a base, a supporting frame is mounted at the top of the base, a rotating motor is mounted on one side of the supporting frame, a rotating shaft is connected to the output end of one side of the rotating motor, and a fixing seat is mounted at the end of the rotating shaft; a hydraulic cylinder is installed on the top of the fixing base, the telescopic end of the bottom of the hydraulic cylinder slidably penetrates through the fixing base, and a mounting plate is installed at the bottom end of the hydraulic cylinder. By arranging the soil turning assembly, soil turning treatment can be carried out before soil fertilization, after soil turning, the fertilizer absorption efficiency can be improved, soil hardening can be broken, soil porosity and air permeability can be improved, root system respiration and expansion can be promoted, fertilizer nutrients can be absorbed by root systems more easily, meanwhile, deep turning can avoid the situation that the nutrients are enriched on the surface layer, and consequently root burning or loss is caused; after soil turning is completed, the soil can be fertilized conveniently, the water and fertilizer retention performance of the soil is enhanced, and the survival rate and yield of beet planting are increased conveniently.

The present application relates to the technical field of fertilizer, in particular to an organic leaf fertilizer and a production method thereof.The present application solves the problems of poor fertilizer efficiency and easy damage to soil structure.The present application improves the soil organic matter content of the organic leaf fertilizer by changing the dosage of kelp, the temperature and time of ultrasonic and the dosage of kelp extract; improves the relative content of plant chlorophyll of the organic leaf fertilizer by changing the dosage of earthworms, trypsin and amino acid extract; improves the soil porosity of the organic leaf fertilizer and reduces the soil bulk density by changing the dosage of shrimp shells, the temperature of removing protein and the dosage of chitosan extract; increases the plant leaf thickness of the organic leaf fertilizer by changing the dosage of straw and the dosage of cellulose extract; and improves the fertilizer utilization rate of the organic leaf fertilizer by changing the temperature and time of stirring and the time of emulsification and grinding.

The application provides a kind of biological fertilizer prepared based on blue-green algae mud, and belongs to the technical field of biological fertilizer preparation.The biological fertilizer according to the application comprises, by weight fraction, 20-40 parts of blue-green algae mud fermentation liquor, 30-40 parts of straw, 18-36 parts of animal manure, 5-8 parts of urea, 6-12 parts of ammonium chloride and 0.2-1 part of yeast, wherein the blue-green algae mud fermentation liquor is prepared by mixing blue-green algae mud and heat condensate, then adding enzyme preparation, mixed Bacillus and inorganic salt mixture, and anaerobic fermentation culture.The application not only realizes the resource treatment of blue-green algae mud and reduces environmental pollution, but also the prepared biological fertilizer contains nutrients such as nitrogen, phosphorus and potassium required for plant growth, and the crops applying the biological fertilizer prepared by the application can not only improve the survival rate, but also further improve the yield per mu, improve the soil quality, and the soil porosity reaches 60-65%, without caking and residue.

This invention relates to an experimental apparatus and method for studying the water-blocking effect of two-component grouting under dynamic water conditions, belonging to the field of indoor testing in geotechnical engineering. It mainly includes a test chamber, a sealing cover, an air compressor, an automatic water supply machine, intelligent grouting equipment, a seepage pressure monitoring system, a wastewater collection tank, and grouting perforated pipes. Using this experimental apparatus, by changing the seepage velocity, soil porosity, grouting pressure, and the ratio of the two-component grout, the effects of different factors on the grouting volume, water-blocking effect, grouting time, grout diffusion range, and diffusion morphology can be compared. Through comprehensive analysis of the experimental results, the most suitable two-component grouting parameters for specific working conditions can be found, providing a reference for two-component grouting in dynamic water control projects.

The invention provides a saline-alkali soil improver prepared based on animal enzymes and a preparation process thereof, and relates to the technical field of soil improvement. The saline-alkali soil improver prepared based on the animal enzyme is prepared from the following components in parts by weight: 30 to 50 parts of animal enzyme fermentation liquor, 10 to 20 parts of humic acid, 5 to 10 parts of microbial agent, 5 to 10 parts of plant source water-retaining agent, 2 to 8 parts of natural organic acid, 1 to 5 parts of trace element chelate, 3 to 8 parts of sodium alginate, 2 to 5 parts of sodium lignin sulfonate and 1 to 3 parts of ferrous sulfate. The animal enzyme fermentation liquor is prepared from animal waste through anaerobic fermentation, and the animal enzyme fermentation liquor contains organic acid, enzymes and active microorganisms. The animal enzyme fermentation liquor is used as a main raw material, and organic acid in the animal enzyme fermentation liquor can neutralize soil alkalinity and reduce the pH value of soil; enzymes contained in the fertilizer can promote decomposition of organic substances in soil, increase the porosity of the soil and improve the structure of the soil; amino acid, polysaccharide and the like provide nutrition for soil microorganisms and plants, and the soil fertility is enhanced.

The invention discloses a natural gas leakage point accurate positioning method fusing multi-source parameter dynamic correction. The method comprises the steps that S1, a distributed monitoring network is constructed (N is larger than or equal to 3 non-collinear integrated detection modules, a methane sensor with the detection limit smaller than or equal to 1 ppm is included, and environment parameters such as concentration and diffusion waves and the leakage rate are synchronously collected according to the frequency larger than or equal to 0 Hz); s2, establishing a double-stage diffusion coupling model (wherein the diffusion coefficient is corrected based on the Fick's law in the soil stage of Z < 0, the wind direction influence is corrected based on a dynamic Gaussian plume model in the atmosphere stage of Z > = 0, and coupling is realized through soil porosity correlation transfer coefficient); s3, constructing a multi-dimensional equation set, optimizing a diffusion wave distance equation through a calibration experiment, and solving a leakage point coordinate by adopting a particle swarm algorithm; and S4, verifying the calibration precision through residual errors, and adapting to low-concentration, high-wind-speed and complex soil scenes. The positioning error is smaller than or equal to 5 cm, the environment adaptation range is enlarged by three times, the false alarm rate is smaller than or equal to 0.1%, and the precise positioning requirement under the complex working condition can be met.

The invention provides a method for rapidly improving the water storage and fertilizer supply capacity of subsurface soil, and belongs to the technical field of soil improvement. The method for rapidly improving the water storage and fertilizer supply capacity of the subsurface soil comprises the following steps: uniformly mixing an organic fertilizer, a soil conditioner and a compound fertilizer; uplifting the surface soil; conveying the mixed material to a subsurface layer, and uniformly mixing the mixed material with subsurface layer soil; performing rotary tillage on deep soil; raking and leveling surface soil; the organic fertilizer is sheep manure; the soil conditioner is a polyacrylamide and potassium polyacrylate adhesive copolymer; the contents of nitrogen, phosphorus and potassium in the compound fertilizer are 29%, 15% and 6% respectively; the total nutrient content in the compound fertilizer is greater than or equal to 50%. According to the method, the physical and chemical properties of the subsurface soil are effectively improved, the porosity of the soil is increased, water, fertilizer, gas and heat in the soil are coordinated, loosening and curing of the soil are promoted, an effective plough layer is deepened, and the water storage and fertilizer supply capacity of the subsurface soil is rapidly improved.

A computer-assisted method to monitor soil porosity at a field study site using a portable apparatus, the method including: acquiring a soil sample using a first container; recording a first measurement of a mass and a volume of the soil sample; adding the soil sample to a second container until the soil sample is added in entirety, wherein the second container is pre-filled with a fluid medium, wherein the soil sample is added to the second container without causing soil clustering, and wherein a second measurement of a mass of the second container with the fluid medium is recorded; recording a third measurement of a mass of the second container with the soil sample fully immersed in the fluid medium; calculating a porosity of the soil sample based on the first, second, and third measurements; and providing, at the field study site, the calculated porosity of the soil sample.

The present invention relates to the technical field of biochar preparation, and particularly to a method for preparing a biochar composite material based on soil remediation, including: firing biochar using several types of raw materials, and sending the fired biochar to a testing institution for testing; detecting the light transmittance of each biochar to determine the porosity of the biochar fired from each raw material; determining the corresponding reasonable biochar porosity according to the soil porosity of the corresponding soil remediation plot; mixing the raw materials and preparing biochar with the corresponding porosity; mixing the corresponding modification materials into the biochar with reasonable void ratio according to the heavy metal element content of the soil remediation plot to complete the soil remediation biochar for the corresponding plot. The porosity is determined by using the light transmittance of the biochar, and the formula of the biochar is adjusted according to the soil porosity, effectively improving the efficiency of biochar for soil remediation while effectively enhancing the pertinence of the biochar composite material for soil remediation.

The invention discloses an improvement material and an improvement method suitable for soda saline-alkali soil in northeast China, and relates to the technical field of saline-alkali soil improvement. The improvement material suitable for the soda saline-alkali soil in the northeast region comprises humic acid modified biochar, coal gangue, yellow sand and organic fertilizer. According to the technical scheme, by adding humic acid modified biochar, the soil porosity is improved, the soil bulk density is reduced, the organic matter content is increased, the soil structure is effectively improved, and soil nutrients are increased; coal gangue and yellow sand are added to improve the air permeability and water permeability of soil, and formation of an agglomeration structure is facilitated; organic fertilizer and humic acid modified biochar are applied to provide a sufficient carbon source for soil; by adding the microbial agent, the soil microbial activity can be improved, organic matter decomposition and nutrient release are promoted, and the soil organic matter content and nutrient circulation capacity are improved. The method provided by the invention can be used for solving the problems of high cost, unsatisfactory improvement effect and non-persistent improvement during Northeast soda saline-alkali soil improvement.

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 cultivation method for promoting the growth of small old trees of oil camphor trees, ready-made fertilizer (compound fertilizer + dead camphor) is mixed with natural organic matter to form a good nutrient environment around the plants, through ditching, the soil around the plants is loosened, and the soil porosity around the plants is increased. A black plastic cloth artificial water collection concave pond is formed around the plants, during drought, after rainfall, water in the whole range of the plants flows to the roots of the plants, water collection is increased, and then, when rainfall is sufficient, the land under the plastic cloth can be drained, and the situation that the original soil topography is changed to form a water collection concave pond, but waterlogging affects the growth of the plants is avoided. The black plastic cloth concave pond is shaded and has the function of preventing grass, because of the space, the use of grass prevention cloth for grass prevention is avoided, the plant roots are prevented from floating on the soil and affecting the final growth result.