303 results about "Soil conditioning" patented technology

The invention relates to the technical field of saline-alkali soil improvement, in particular to an intelligent irrigation and soil conditioning system for saline-alkali soil improvement, which comprises a climate prediction module, a soil detection module, an electrochemical salt migration prediction module, a data analysis module, an irrigation execution module and a data feedback module, the climate prediction module predicts future climate conditions; the soil detection module monitors soil parameters of the saline-alkali land in real time; the electrochemical salt migration prediction module is used for predicting the migration behavior of salt in soil; the data analysis module formulates irrigation and soil conditioning strategies; the irrigation execution module controls operation of irrigation equipment; and the data feedback module feeds back the irrigation execution result and the actual soil improvement effect, and continuously optimizes irrigation and soil conditioning strategies. According to the method, efficient utilization of resources is achieved, and the accuracy and scientificity of saline-alkali soil improvement are ensured.

The invention discloses a crop growth real-time monitoring system and method, and relates to the technical field of crop monitoring. According to the crop growth real-time monitoring method, crop image data time sequence and soil state time sequence data are continuously acquired in real time, data analysis is performed respectively to obtain an initial agricultural healthy flow index and a soil conditioning index of each monitoring time period, comprehensive analysis is performed to obtain a comprehensive agricultural healthy flow index of each monitoring time period, and prediction analysis is performed to obtain a real-time crop growth monitoring result. According to the method, the comprehensive agricultural healthy flow index of the next monitoring time period is compared and analyzed with the preset comprehensive agricultural healthy flow index interval, and corresponding early warning measures are taken based on the comparison and analysis result, so that the growth state of crops and the change of the soil environment are tracked in real time; therefore, the health state of the crops and the influence of the soil on the growth of the crops are obtained, and the monitoring accuracy and predictability are improved.

The invention relates to a soil conditioner for saline-alkali land treatment and a preparation method, and belongs to the technical field of soil conditioners. The soil conditioner for saline-alkali land treatment is prepared from a fermented fertilizer, biomass charcoal II, corn straw powder, attapulgite powder, humic acid and a compound microbial agent. The soil conditioner disclosed by the invention can be used for reducing the pH value of soil, reducing salinity, promoting the recovery of organic matters and improving the fertility of the soil, and is beneficial to improving the yield of crops.

The invention relates to the technical field of soil conditioner preparation, in particular to acidified soil conditioner preparation equipment which comprises a fusion cylinder; a stabilizing seat; the automatic jacking unit is arranged between the fusion cylinder and the stabilizing seat; the side stirring and mixing unit is connected with the stabilizing seat, extends to the inner side of the fusion cylinder, is laterally arranged on the inner side of the fusion cylinder, and is also connected with the fusion cylinder and an automatic jacking unit; wherein the side-arranged stirring and mixing unit comprises a variable stirring assembly, a multi-element synchronous transmission control assembly and a rotary mixing assembly, by arranging the side-arranged stirring and mixing unit and cooperating with the automatic jacking unit, in the stirring process, lifting and rotating of a fusion cylinder can be achieved at the same time, and the stirring position can be synchronously adjusted; therefore, comprehensive stirring of the materials located on the inner side of the fusion cylinder is achieved, and mixing sufficiency and uniformity are guaranteed.

The present invention discloses a composite conditioner for repairing acidified soil and a preparation method thereof, and belongs to the technical field of acidified soil repair. The present invention prepares a carrier for loading bacterial strains by mixing and calcining steel slag, straw and kaolin, and then loads the embedded bacterial strains in the carrier to prepare a soil conditioner, which can efficiently repair acidic soil and provide sufficient nutrients for the soil; the soil conditioner provided by the present invention can adjust the release rate according to the pH value of the acidic soil to be repaired, and can reduce the amount of the soil conditioner on the basis of improving the repair effect; the soil conditioner provided by the present invention has high stability and obvious slow-release effect; the raw materials used in the present invention are simple and easy to obtain, the preparation process is simple, and it is suitable for large-scale promotion and application.

According to the microbial composite soil conditioner and the preparation method thereof, decomposition of organic matters in soil can be promoted through multiple microorganisms in the microbial composite soil conditioner, and the air permeability and the water-retaining property of the soil are improved. Meanwhile, the zeolite powder and the rice hull powder ash can improve the pore structure of the soil and improve the drainage capacity and the air permeability of the soil, so that the growth environment of the plant root system is optimized. The decomposed organic fertilizer and the edible fungus residue organic matter are rich in nutrient elements of nitrogen, phosphorus and potassium, and can provide continuous and stable nutrient supply for crops. In addition, the amino acid stock solution, the pyroligneous liquor and the molasses liquor contain various trace elements and bioactive substances, so that the disease resistance and the growth vitality of crops can be enhanced. Due to the improvement of the soil structure, the improvement of fertility and the enhancement of microbial activity, crops can better absorb nutrients and moisture, the occurrence of diseases and pests is reduced, and the increase of the crop yield and the crop quality are effectively improved.

The invention provides a composite soil conditioner and a preparation method thereof, and belongs to the technical field of agriculture, and the preparation method comprises the following steps: step S1, preparing a multi-arm polymer; step S2, preparing modified biochar; step S3, preparing a sustained-release microcapsule; s4, mixing the modified biochar, the sustained-release microcapsules and the sodium carboxymethyl cellulose solution, and granulating to obtain the composite soil conditioner. The soil conditioner disclosed by the invention can achieve the purposes of efficiently adsorbing heavy metals, adjusting the pH value of soil and helping the soil to retain water.

The present invention provides a soil conditioner and a preparation method and application thereof, belonging to the technical field of soil conditioners. The soil conditioner of the present invention comprises the following raw materials in parts by weight: 70 to 90 parts of modified pig manure biochar, 8 to 15 parts of polyaspartic acid, 5 to 10 parts of potassium titanium oxalate, 1 to 3 parts of ammonium molybdate, 40 to 60 parts of calcium silicate, and 20 to 30 parts of lime. The present invention uses a mixed modifier to modify pig manure biochar, which can greatly reduce the content of cadmium and arsenic in edible parts. In addition, the raw materials in the soil conditioner cooperate with each other to reduce the content of heavy metals in the edible parts to the greatest extent.

The invention provides a conditioner for soil heavy metal pollution remediation and a preparation method thereof, and belongs to the technical field of soil conditioning. The conditioner for soil heavy metal pollution remediation provided by the invention is prepared from the following components in parts by mass: 12 to 25 parts of biochar, 5 to 7 parts of potassium feldspar, 1 to 5 parts of inorganic nano material and 40 to 70 parts of water, the fertilizer is prepared from 40-50 parts of humic acid, 15-25 parts of amino acid, 5-12 parts of citric acid, 4-8 parts of bagasse and 25-40 parts of vinasse. 0.5 to 1 part of aspergillus niger and 0.1 to 1 part of clostridium capsulatum. By utilizing the adsorption of inorganic components on heavy metal elements, the improvement of organic components on saline-alkali soil and the continuous remediation effect of microbial components on the soil, through the synergistic effect of the multiple components, the soil is treated at the same time from multiple aspects of soil fertilization, plant growth, soil loosening, salinity and alkalinity reduction and the like; the soil salinity and alkalinity are reduced, and heavy metals are adsorbed and absorbed.

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 belongs to the field of preparation of soil conditioners, and particularly relates to a soil loosening and root promoting soil conditioner and a preparation method thereof. A polymer formed by vinyltriethoxysilane, polyacrylic acid and coumarin under the catalytic action of citric acid is mixed with porous powder obtained after crushing and nutrient organic matter, and freeze-drying is performed to obtain the soil-loosening improved fermentation substrate which can be slowly released in soil; polyaspartic acid and acetylchitosamine are cross-linked under the catalytic action of N-hydroxysuccinimide, root-promoting nutrition powder and auxiliary root-promoting components are mixed, and the obtained composite root-promoting agent can significantly promote the growth of plant root systems; a porous structure contained in the protective stability maintaining agent can provide a relatively stable microenvironment for effective components, and the soil loosening and root promoting agent is mixed with the soil loosening and improving fermentation substrate and the composite root promoting agent, so that the prepared soil loosening and root promoting soil conditioner is remarkable in soil loosening and root promoting effect, long-acting and stable, small in dosage, obvious in effect and stable in conditioning effect after being stored.

The invention discloses a multifunctional application device for a soil conditioner and a using method thereof, and relates to the technical field of agricultural generation equipment, the multifunctional application device comprises an application compartment body, a real-time detection module and a central control processor, the real-time detection module is installed on the front face of the outer wall of the application compartment body, and the central control processor is installed at the top of the inner wall of the application compartment body; the real-time detection module is connected to the central control processor through a data signal line; the real-time detection module comprises a storage motor, a soil probe and a camera module. By installing the real-time detection module, the real-time acquisition and comparison functions of soil parameters are achieved, the problem that different conditioning treatment steps are needed due to different soil type state condition parameters is solved, soil is pretreated in a targeted mode, and the conditioning effect of the soil conditioner on the soil is improved.

The invention relates to a soil conditioner based on nitrification inhibition and a soil acid control method, and belongs to the technical field of soil conditioning, the soil conditioner comprises the following components by weight: 20-22 parts of humic acid, 32-36 parts of syringic acid-linoleic acid modified porous hydroxyapatite, 4-5 parts of complete nitrifying bacteria, 2-5 parts of syringic acid, and 2.8-4.2 parts of sodium carboxymethyl cellulose. According to the technical scheme, syringic acid and linoleic acid serve as nitrification inhibitors, the nitrification inhibition rate can be effectively increased, ecological niches of ammonia-oxidizing archaea and ammonia-oxidizing bacteria can be reduced through competitive occupation due to addition of complete nitrifying bacteria, the nitrification rate of the ammonia-oxidizing archaea and the ammonia-oxidizing bacteria is inhibited, and N2O emission is reduced. Humic acid and hydroxyapatite can be used as pH buffer substances to regulate and control soil acidity, aluminum toxicity can be relieved, and physical and chemical properties of soil can be improved; meanwhile, the complete nitrifying bacteria can be ensured to have relatively high activity under the condition that the pH is 5.5-6.5.

The invention discloses a granular soil conditioner capable of improving acid and passivating aluminum and a preparation method of the granular soil conditioner, and belongs to the technical field of soil improvement. The invention provides a preparation method of a granular soil conditioner for modifying acid and passivating aluminum. The preparation method comprises the following steps: uniformly mixing alkaline phosphate tailing powder, silicon-based yellow phosphorus slag powder, silicate minerals and a carbon source conditioner to obtain a mixed powder material; the mixed powder material is soaked in an alkali solution for alkali modification treatment, and an alkali modified conditioner is obtained; soaking the alkali modified conditioner in a chitosan solution, and reacting to enable functional groups of chitosan to be attached to the surface of the alkali modified conditioner, so as to obtain a chitosan modified conditioner; and adding a binder into the chitosan modified conditioner, and granulating to obtain the acid-modified aluminum-blunt granular soil conditioner. The granular soil conditioner provided by the invention can be used for effectively improving acid soil and has relatively high capability of passivating aluminum.

An ex situ electrokinetic system and method for decontaminating soils and other fine-textured media, including salt-contaminated soil, is disclosed. The system consists of a series of unit processes that continuously remove inorganic and organic contaminants yielding a final decontaminated product. The initial soil conditioning unit process produces a homogenous slurry saturated with a customised electrolyte. The next unit process uses electroosmosis and electromigration along with hydraulic pressure to move electrolyte and dissolved ions through the slurry. The contaminants are released into the electrolyte and are removed at the cathodes. The last unit process removes residual electrolyte and contaminants producing a final product suitable for land application or other uses.

The invention belongs to the related technical field of soil conditioning, and particularly relates to a soil conditioner releasing device and method.The soil conditioner releasing device comprises a frame body, an adjusting mechanism is arranged on the left side of the frame body, and a soil loosening mechanism is arranged at the lower end of the adjusting mechanism; the upper end of the soil loosening mechanism is movably connected with two rotating sleeves, and two limiting grooves are formed in each rotating sleeve. Through mutual cooperation of a first double-shaft motor, a first worm, a first transmission wheel and a second transmission wheel, the effect of driving a first rotating rod to rotate can be achieved, and through rotation of the first rotating rod, the effect of driving a discharging rotating roller arranged on each adjusting and releasing mechanism to rotate can be achieved; the soil conditioner in the material box can be quantitatively and uniformly fed into soil through the discharging pipe under the mutual cooperation of the arranged releasing groove body, the discharging groove and the adjusting block through rotation of the discharging rotating roller, and therefore the quantitative releasing process of the soil conditioner is achieved.

The invention relates to the technical field of soil conditioners, in particular to a soil conditioner for soil acidification treatment as well as a preparation method and application of the soil conditioner. Comprising the following components in parts by weight: 20-35 parts of red mud, 10-15 parts of a humic acid-sodium alginate compound, 10-15 parts of zeolite, 5-8 parts of a silicon-calcium-magnesium fertilizer, 4-8 parts of an acid-proof bacterial agent and 10-15 parts of a bio-based adhesive. The acidified soil treatment effect can be better, and the effect is more durable.

The invention discloses a soil conditioner for improving saline-alkali soil and a preparation method of the soil conditioner, and belongs to the technical field of saline-alkali soil improvement. A light / biological dual-degradation foaming carrier is used as a matrix and is filled with microcapsules with core-shell structures, and the microcapsules are filled with organic matter fulvic acid and humic acid; a layer of microgel film covers the surface of the light / biological dual-degradation foaming carrier, and the structure has a good slow release effect on organic matters; a hydroxyl group of a bio-based polyurethane monomer castor oil polyether polyol is bonded with a silicon hydroxyl group of modified nano titanium dioxide obtained by gamma-aminopropyltriethoxysilane treatment, so that the nano titanium dioxide is loaded in the bio-based polyurethane foam material; the light / biological dual-degradation foaming carrier can promote decomposition through light degradation and biological degradation, and chitosan and potassium alginate in the shell of the microcapsule are natural materials and have good degradability when applied to soil as a soil conditioner.

The invention discloses a potassium-containing phosphorite mineral-based soil conditioner and a preparation method thereof.The preparation method comprises the steps that firstly, potassium-containing phosphorite is smashed and sieved, then the potassium-containing phosphorite, an alkali roasting agent and an activating auxiliary are mixed in proportion, water is added for full stirring, then calcination is conducted, roasted clinker is obtained, the roasted clinker is cooled and smashed, and the soil conditioner is obtained. According to the technical scheme, the potassium-containing phosphorite is subjected to alkali roasting to prepare the soil conditioner for the first time, dissolution of soluble potassium is promoted through an alkali roasting agent and an activating auxiliary agent, and loose and porous filter residues which contain citric potassium, phosphorus, silicon and calcium and are high in water absorption and slow in ion release are generated and used as the soil conditioner; the preparation process of the soil conditioner has the advantages of simplicity in operation, low reaction temperature, less pollution, low requirements on equipment and the like, realizes pollution-free and zero-emission high-added-value comprehensive utilization of potassium-containing phosphorite resources, and has a good industrial application prospect.

The invention provides a soil conditioner, a preparation method thereof and a method for improving soil quality, and relates to the technical field of soil conditioning. The soil conditioner is prepared from the following raw materials in parts by weight: 35-45 parts of calcium chloride loaded sludge biomass charcoal; 5-10 parts of a corncob plant extract; 5-15 parts of polyferric silicate sulfate; 5 to 10 parts of nano zinc oxide; 10 to 20 parts of phosphate mineral; and 3-5 parts of sodium polyacrylate. The preparation method comprises the following steps: mixing the plant extract and the nano-zinc oxide according to a mass ratio of 1: 1, reacting to obtain coated nano-zinc oxide, mixing the coated nano-zinc oxide with other raw material components in parts by weight, granulating, and drying to obtain the soil conditioner. The soil conditioner has multiple effects of adjusting the pH value of soil, increasing the content of organic matters in the soil, reducing the content of pollutants such as heavy metal cadmium and arsenic in the soil, increasing the crop yield and the like, the dosage per mu is lower than 100 kg, and secondary pollution is avoided.

The invention relates to the technical field of soil conditioning, and particularly discloses a soil conditioner and a preparation method and application thereof.The soil conditioner is prepared from, by weight, 160-200 parts of volcanic ash modified biochar, 50-70 parts of straw leavening and 50-70 parts of animal dung; the volcanic ash modified biochar is obtained by mixing volcanic slag and crop straw according to a mass ratio of 1: (4-5) and then carrying out carbonization reaction at 450-650 DEG C. According to the soil conditioner provided by the invention, the content of organic matters in black soil is increased, the content of water-stable large aggregates in the soil is increased, and the effects of recarburizing and improving the soil are achieved.

The utility model relates to the technical field of soil conditioning, and discloses a biochar-based soil conditioner granulating device which comprises a granulating box, an inlet pipeline is fixedly installed on the upper surface of the granulating box, the lower end of the inlet pipeline penetrates into the granulating box, a sealing plate matched with the inlet pipeline is arranged at an opening in the upper end of the inlet pipeline, and a plurality of air outlets are formed in the lower end of the inlet pipeline. The inlet pipeline is hinged to the left end of the closing plate, the fixing mechanism is arranged on the closing plate and used for fixing the inlet pipeline and the closing plate, the fixing mechanism comprises a pull switch, and the inlet pipeline and the closing plate can be fixed and an opening in the upper end of the inlet pipeline can be closed by enabling a trapezoidal clamping plate to enter a clamping groove; a large amount of dust generated by dry powder in the granulation box in the granulation process is sealed in the granulation box, the dust is prevented from being scattered out and inhaled by workers to hurt the bodies of the workers, the sealing performance of the device is enhanced, and therefore the safety of the workers is improved.

The invention relates to the technical field of agricultural microbial fertilizers, and discloses a soil improvement microbial fertilizer and a preparation method thereof, the soil improvement microbial fertilizer is prepared from the following raw materials by weight: 5-8 parts of a composite microbial agent, 30-40 parts of a modified biomass carrier, 25-35 parts of a slow release nutrient matrix, 15-20 parts of a soil conditioning aid, 2-3 parts of a microbial synergist, 1-2 parts of an adhesive, and 3 parts of a coating liquid. According to the invention, dual protection of trehalose loading and xanthan gum-PVA coating is adopted, and the L-proline synergist is matched, so that microorganisms still can survive in a high-temperature and high-salt environment, the inhibition of a severe soil environment on the microorganisms is broken through, and the application range is wider than that of commercially available products.

The invention discloses a preparation method and application of a saline-alkali-resistant soil conditioner taking mixed algae as a raw material. The saline-alkali-resistant soil conditioner is specifically prepared from the following raw materials in parts by weight: 50-80 parts of mixed algae powder; 10 to 30 parts of humic acid; and 5-10 parts of a microbial agent. The invention relates to the technical field of soil conditioning, in particular to a preparation method and application of a saline-alkali-resistant soil conditioner taking mixed algae as a raw material, the soil salinity and alkalinity of saline-alkali soil can be obviously reduced, for example, in the later growth period of wheat, the soil salinity and alkalinity can be reduced to 0.2%-0.3% from the initial 0.5%-1.0%, the reduction amplitude reaches 50%-60%, and the soil salinity and alkalinity can be obviously improved. The soil fertility is greatly improved, the conditioner can remarkably increase the content of nutrients such as organic matters, nitrogen, phosphorus and potassium in soil, meanwhile, the pH value of the soil is reduced, the pH value of the soil is improved, the content of the organic matters can be increased by 50%, the content of the nitrogen can be increased by 40%, the content of the phosphorus can be increased by 40%, and the content of the potassium can be increased by 30%. The potassium content is increased by 33.3%, the PH value is reduced by 4.88%, and compared with a commercially available conditioner, the soil fertility index is increased by the conditioner.

The invention belongs to the field of fertilizers, and particularly relates to a soil conditioner and application thereof. The soil conditioner is prepared from the following components in parts by weight: 20 to 60 parts of biochar, 10 to 50 parts of silicon-calcium-potassium-magnesium, 10 to 30 parts of bentonite, 15 to 35 parts of surfactant and 3 to 15 parts of biostimulant, the surfactant comprises one or more of sodium lignin sulfonate, sodium taurine laurate or rhamnolipid, and the biostimulant comprises one or more of humic acid, chitosan, trehalose or polyglutamic acid. The conditioner is prepared by compounding a plurality of surfactants and biostimulant, and has three significant soil conditioning properties of ventilation, fertility increase and water retention. The soil conditioner can break soil hardening, loosen soil, improve soil permeability, reduce soil bulk density, promote soil microbial activity, enhance soil fertilizer and water permeability and improve crop yield.

The invention provides a multifunctional soil conditioner as well as a preparation method and application thereof, and relates to the technical field of soil conditioning. Comprising 5-15 parts of nano cellulose modified by a phosphorus-containing compound; 15 to 25 parts of zinc-aluminum hydrotalcite; 25 to 35 parts of magnetic nano montmorillonite; 30 to 40 parts of attapulgite; 5-15 parts of an amino acid mixture; the phosphorus-containing compound modified nano-crystalline cellulose is prepared by the following steps: dispersing nano-crystalline cellulose in deionized water to prepare a nano-crystalline cellulose suspension; and then adding a phosphorus-containing compound into the nano-cellulose suspension for modification, the magnetic nano montmorillonite is prepared by dispersing montmorillonite in an aqueous solution containing ferroferric oxide nano particles and carrying out ultrasonic stirring modification; the amino acid mixture is a mixture of glycine, alanine and lysine. The soil conditioner has multiple effects of adjusting the pH value of soil, reducing the content of various heavy metal pollutants in the soil, increasing the crop yield and the like, secondary pollution is avoided, and the effect is stable.

Biodegradable growing media and soil conditioning compositions include nanocelluloses, such as carboxylated CNF, carboxylated LCNF, and carboxylated CNC, which serve as binding and / or wetting agents. Methods include mixing nanocelluloses with plant growth substrate materials. The compositions include the possible addition of monovalent, divalent, or trivalent inorganic salts that supply essential plant nutrients. These compositions can be processed into plug or mat forms suitable for supporting the germination and growth of crops. Carboxylated nanocellulose-based compositions can be directly applied as soil conditioners or amendments to enhance soil health and plant development.

The present invention relates to an acidic soil conditioner and a preparation method and application thereof. The acidic soil conditioner includes a carbon-based acid conditioner, a mineral source conditioner and a microbial preparation. The preparation method of the acidic soil conditioner includes: calcining and grinding oyster shells to obtain oyster shell powder; mixing oyster shell powder, modified biochar and quicklime to obtain a carbon-based acid conditioner; crushing and sieving at least one of attapulgite, montmorillonite and dolomite to obtain a mineral source conditioner; mixing Bacillus subtilis, Bacillus licheniformis and Trichoderma harzianum in proportion to obtain a microbial preparation; the preparation of the acidic soil conditioner: uniformly mixing the prepared carbon-based acid conditioner, mineral source conditioner and microbial preparation, and then coating to obtain a coated acidic soil conditioner. The present invention also provides an application of an acidic soil conditioner for conditioning, improving and repairing degraded acidic soil. The present invention solves the problems of soil acidification and nutrient deficiency at the same time.

The invention relates to the technical field of data processing, and provides a comprehensive intelligent evaluation method and system for a soil conditioning effect, and the method comprises the steps: obtaining the soil cadmium content, the crop cadmium content and the soil acidity and alkalinity of a plurality of soil samples of a plurality of soil types after multiple times of conditioning, and the conditioner cost of each time of conditioning; dividing the soil sample to obtain a plurality of pollution categories; according to the soil cadmium content change and change difference of the same soil sample after adjacent conditioning, the soil passivation degree of each soil sample under the soil cadmium content after each conditioning is obtained; the conditioning response degree of each soil sample under the soil cadmium content is obtained; the remediation contribution degree of each pollution category under the soil cadmium content is obtained; and obtaining the grey correlation degree of each evaluation index and other evaluation indexes in each pollution category, so as to construct a conditioning evaluation model. The invention aims to solve the problem of inaccurate evaluation caused by the fact that the influence of soil quality and pollution degree is not considered in the evaluation process of the soil conditioning effect.

The invention provides a soil conditioner for repairing farmland heavy metal pollution and a preparation method of the soil conditioner, and belongs to the technical field of soil conditioning materials.The preparation method comprises the steps of preparing primary modified biochar and preparing secondary modified biochar, and the method for preparing the primary modified biochar comprises the steps that biochar powder is added into a nitric acid solution, water bath is conducted, filtering is conducted, and the secondary modified biochar is obtained; putting a filter cake into a reactor, putting the reactor into a microwave device, adjusting the frequency to be 2.35-2.55 GHz, introducing N2, adjusting the pressure to be 6-8 MPa, reacting for 4-6 minutes, then changing the frequency to be 2.05-2.25 GHz, introducing Cl2, changing the pressure to be 4-6 MPa, reacting for 7-13 minutes, after the reaction is finished, pyrolyzing and cooling a reactant, soaking the reactant in a NaOH solution, filtering and drying to obtain primary modified biochar; the soil conditioner prepared by the invention has a good adsorption effect on heavy metals such as cadmium, mercury, chromium, copper and nickel.