188 results about "Cadmium pollution" patented technology

The invention discloses a method for reducing cadmium accumulation of rice and improving salt tolerance. According to the invention, the CDS sequence expression of the OsRBOHA is driven by the OsNAC4 promoter, so that the avoidance capability of the rice to non-uniform stress is remarkably improved, and the stress exposure of a root system is reduced. A soil culture experiment shows that the pOsNAC4: OsRBOHA strain reduces cadmium accumulation of overground parts and grains in non-uniform cadmium polluted soil, and enhances salt tolerance of the overground parts in non-uniform salt stress soil.

The invention relates to the technical field of soil cadmium remediation, in particular to a soil Cd recognition and remediation method based on mulberry root exudates and microorganisms. According to the method, spatial microscopic image frames of rhizosphere microflora are divided through a community structure, community node increment updating calculation of adjacent time sequences is executed, the transition recombination frequency of the rhizosphere microflora is obtained, and the transition color of the actual concentration content of root exudates is rendered based on a metal pollution level system and the transition recombination frequency. Generating a stress level heat model of the soil cadmium gradient in the target restoration area; and according to the stress level popularity model, carrying out popularity color analysis and identification on the soil cadmium pollution of the target restoration area, and generating a global stress identification result of the soil cadmium. According to the method, rapid identification of cadmium pollution enrichment can be realized by utilizing the synergistic response between mulberry root exudates and rhizosphere microorganisms, and a repair regulation and control plan is made, so that the cadmium pollution degree is reduced, the soil structure and fertility are optimized, and a safer and healthier environment is provided for plant growth.

The invention belongs to the technical field of modern agricultural precise planting and plant nutrition regulation and control. The invention provides a method for precisely applying selenium to oilseed rape leaf surfaces based on dynamic regulation and control in a growth period, enriching selenium, reducing cadmium and increasing yield. A sodium selenite solution is sprayed to the leaf surfaces in the key growth period of oilseed rape. The method can effectively improve the selenium content of each part of the oilseed rape, reduce the cadmium content of grains and guarantee the yield, is suitable for safe production of oilseed rape replanting in medium-light cadmium-polluted rice fields in the south of China, can be widely applied to standardized production of selenium-rich oilseed rape in main winter oilseed rape producing areas in the Yangtze River basin, and has wide application prospects. The method has important practical significance in improving agricultural quality and efficiency, guaranteeing food safety and promoting income increase of farmers.

The invention discloses a seed coating containing an arbuscular mycorrhizal inoculant. The seed coating is prepared from the following components in parts by weight: 25 to 35 parts of the arbuscular mycorrhizal inoculant, 35 to 45 parts of a soil conditioner, 15 to 20 parts of talcum powder and 15 to 20 parts of polyvinyl acetate. The invention further provides a preparation method of the seed coating containing the arbuscular mycorrhizal inoculant and application of the seed coating to reduction of soil heavy metal pollution, increase of disease resistance and stress resistance of crops and promotion of crop growth. The seed coating containing the arbuscular mycorrhizal inoculant wraps the surfaces of plant seeds, provides good nutritional ingredients for growth and development of the seeds, and is beneficial to improving the germination rate of the seeds under heavy metal cadmium stress, reducing soil heavy metal cadmium pollution, improving soil quality, increasing soil fertility and improving disease resistance and stress resistance of crops; growth of seedlings is promoted, and crop quality and yield are improved.

The invention discloses alcaligenes faecalis X4 and application thereof, the strain is preserved in China Center for Type Culture Collection (CCTCC) on May 8, 2025, the address is Wuhan University, Wuhan, China, and the preservation number is CCTCC M 2025998. The degradation rate of the alcaligenes faecalis X4 to flumorph with the concentration of 50 mg / L exceeds 70% within 72 h, and the maximum tolerance concentration to cadmium is 120 mg / L. The strain provides powerful technical support for treatment of combined pollution of flumorph and cadmium, and has important significance for solving the problem of complex environmental pollution.

The invention discloses a rice cadmium pollution analysis method and system based on a near infrared technology, and the method comprises the steps: constructing a test scheme database, and setting a plurality of rice pollution test groups; performing rice sample collection on each rice pollution test group and selecting rice pollution test samples meeting expectation; carrying out spectrum acquisition and preprocessing the acquired spectrum data to obtain a preprocessed spectrum data set; extracting a full-wavelength reflectivity value of each rice pollution test sample, introducing a CARSA algorithm to carry out global feature iterative screening, and constructing a rice cadmium pollution spectral feature database; constructing a rice cadmium pollution prediction model, and training the rice cadmium pollution prediction model based on the rice cadmium pollution spectral feature database; dividing the target detection area into a plurality of sub-areas for rice sample sampling and spectrum acquisition, predicting the rice cadmium pollution degree of each sub-area, and performing pollution tracing. And high-precision and universal cadmium pollution rapid detection and pollution source positioning are realized.

The invention discloses a method for in-situ passivation of available cadmium in soil, and belongs to the technical field of heavy metal contaminated soil treatment. According to the method, the fulvic acid with the molecular weight being 100 kDa or above is applied to the acid mining area soil with the pH being 2-4.5 according to the adding amount of 3-20 gC / kg, the low-concentration cadmium pollution of the source being 4 mg / kg or below is removed, the concentration of effective-state cadmium is reduced, the cost is saved, the natural substance fulvic acid is used as the remediation agent, operation is easy and convenient, and the method is suitable for remediation of various mining area soil.

The invention discloses a recombinant bacillus paralicheniformis and an application of the recombinant bacillus paralicheniformis in production of betaine. According to the invention, bacillus paralicheniformis Bp1 with heavy metal cadmium resistance is used as a chassis strain, and an de novo synthesis pathway which takes glucose as a substrate and synthesizes glycine betaine through glycolysis, glyoxylic acid pathway and glycine methylation pathway in sequence is established in the bacillus paralicheniformis, so that the survival rate of the glycine betaine in cadmium-polluted soil is increased; the effects of the microbial soil treating agent and the microbial fertilizer are improved, so that the growth of the plant-black nightshade with an enrichment effect on cadmium and the absorption of the black nightshade on the cadmium in the polluted soil are promoted.

The invention provides bacillus mycoides Y2 with functions of reducing cadmium content of crops and promoting growth and application of the bacillus mycoides Y2, and relates to the technical field of soil heavy metal pollution bioremediation and agricultural microorganism application. The bacillus mycoides Y2 is preserved in the China General Microbiological Culture Collection Center (CGMCC) on July 14, 2025, and the preservation number is CGMCC 35231. The strain can be applied to cadmium-polluted soil through root application, can reduce the cadmium content of edible parts of crops such as rice, oilseed rape and fast vegetables, and promotes crop growth and rice root surface iron plaque formation. The contaminated soil in Hunan, Henan and Tianjin is verified to be capable of stably colonizing and adapting to different soils and crops. The strain and the matched preparation are green, efficient, high in stability and wide in universality, and provide key technical support for safe utilization of cadmium-polluted cultivated land.

The invention relates to Burkholderia orbicola and application thereof, the Burkholderia orbicola is preserved in Guangdong Microbiological Culture Collection Center on September 4, 2025, the preservation number is GDMCC No: 66914, and the Burkholderia orbicola is classified and named as Burkholderia orbicola. The composite material has high tolerance to copper, lead and cadmium, the adsorption rate to copper can reach 44.59% in 24 h, the adsorption rate to lead can reach 98.71%, and the adsorption rate to cadmium can reach 48.39%. Therefore, the adsorbent can be used for resisting stress of heavy metals and adsorbing and removing copper, lead and cadmium pollution.

The invention relates to the field of microorganisms, and discloses lactobacillus delbrueckii subsp. Bulgaricus, a fungicide and an additive containing the lactobacillus delbrueckii subsp. Bulgaricus, application of the fungicide and the additive and a pollution relieving method. The preservation number of the lactobacillus delbrueckii subsp. Bulgaricus is CCTCC (China Center For Type Culture Collection) NO: M 20251218, and the microbial agent comprises the lactobacillus delbrueckii subsp. Bulgaricus, the lactobacillus delbrueckii subsp. Bulgaricus and the microbial inoculum provided by the invention can be used for preparing food additives for preventing and / or relieving microplastic-induced body injury, reducing cadmium pollution of food and inhibiting food-borne enterobacter sakazakii, can provide a new scheme for infant food safety and health protection, and have relatively high application value.

The invention discloses a method for repairing alkaline cadmium-polluted farmland in arid and semi-arid regions and application of the method, and belongs to the technical field of soil repairing. According to the method, the alkaline cadmium polluted farmland soil in the arid and semi-arid areas is subjected to deep ploughing treatment, and organic materials are applied to improve the soil fertility and the environment and health quality. On the basis, an intercropping planting system suitable for the arid and semi-arid land area is constructed, low-cadmium-accumulation grain crops and high-cadmium-accumulation plants are reasonably selected according to the ecological conditions and crop characteristics of the area, and an intercropping combination of low-absorption grain crops and enriched economic crop plants is formed. According to the system, organic unification of source reduction of heavy metal pollution in soil, pollution control in the planting process and continuous and safe utilization of the farmland is achieved, the dual goals of pollution remediation and farmland production are taken into account, and pollution reduction and collaborative improvement of economic benefits are achieved; and a feasible technical path is provided for ecological restoration of alkaline heavy metal polluted farmlands in arid and semi-arid regions.

The invention discloses a moringa oleifera peptide-based cadmium blocking agent and application thereof. The preparation is composed of moringa oleifera peptide (the mass volume concentration is 30-120 mg / L), a compound stabilizer (the mass volume concentration is 20-60 mg / L) and a phosphate buffer solution, the compound stabilizer is composed of sodium alginate and nano silicon dioxide according to the mass ratio of 1: (1.0-1.5), and the pH value of the preparation is 6.0-7.0. The moringa oleifera peptide is innovatively applied to cadmium prevention and control of Chinese cabbages in northern alkaline cadmium-polluted soil (pH is 6.5-7.5), accurate regulation and control are achieved in a rhizosphere irrigation mode, a sodium alginate-nano silicon dioxide composite stabilizer system synergistically plays the dual functions of dispersion stability and slow release protection, and it is ensured that the moringa oleifera peptide keeps activity in the soil environment. The preparation has the advantages of being small in dosage, low in cost, easy and convenient to operate, environmentally friendly and the like, a scientific and feasible technical scheme is provided for safe utilization of cadmium-polluted farmlands in northern alkaline soil areas, and the preparation has important application value and popularization prospects.

The invention relates to the technical field of fertilizers, in particular to a fertilizer for relieving soil cadmium pollution and a preparation method thereof. The fertilizer for slowing down cadmium pollution of soil comprises the following raw materials in parts by weight: 30-50 parts of a modified charcoal-based carrier, 10-20 parts of a compound microbial agent, 15-25 parts of a nano mineral passivator, 5-10 parts of a chelated trace element compound fertilizer and 10-15 parts of potassium humate. Through a specific cascade domestication method, the compound bacterial system gradually adapts in a cadmium-containing environment and generates a synergistic metabolism mechanism, then the compound bacterial system is combined with the nano mineral modified by organic intercalation, and the nano mineral not only has strong adsorption capacity to cadmium, but also has strong adsorption capacity to cadmium. And the organic groups modified on the surface can also provide colonization sites and nutrition signals for the domesticated functional bacteria to form a triple barrier of'nano mineral physical passivation-functional bacteria biological resistance and control-metabolite complexing and curing ', so that the long-term effect and stress resistance of passivation are remarkably improved.

The invention discloses a rice-shrimp co-cropping-based cadmium-polluted rice field safe utilization method, which comprises the following steps that 1, a cadmium-polluted rice field to be treated is selected, the cadmium content in the cadmium-polluted rice field to be treated is 0.40-1.50 mg / kg, and the pH range of the cadmium-polluted rice field is 5.5-6.5; 2, a compound fertilizer containing urea, diammonium phosphate and potassium sulfate is applied to the cadmium-polluted rice field to be treated, and rice seedlings are transplanted according to the line spacing of 20-25 cm and the plant spacing of 10-15 cm after ploughing and uniform mixing; 3, after the seedlings turn green, young Australian freshwater lobsters with the body length of 2-5 cm are put in; 4, harvesting rice and lobsters in the rice mature period. The invention aims to significantly reduce the cadmium content in rice through the rice-shrimp co-cropping system and reduce the effectiveness of soil cadmium.

The invention belongs to the technical field of soil heavy metal pollution remediation, and discloses an acid soil cadmium-reducing modifier, a preparation method, a use method and application, the modifier is formed by mixing sulfydryl minerals, biochar and a compound organic fertilizer according to a certain configuration, the sulfydryl mineral is prepared from calcium carbonate, bentonite and 3-mercaptopropyl triethoxy silane. When the soil conditioner is used, the soil conditioner is uniformly applied to a soil plough layer by 0-20 cm manually or mechanically, and the applied soil conditioner accounts for 1-5% of the mass of soil or is 180-220 kg / mu. The soil cadmium-reducing modifier can obviously reduce the effective state content of heavy metal cadmium in the soil, so that the cadmium content in planted rice grains is obviously reduced, the organic matter content of the soil is obviously increased, the ecological environment of polluted farmland soil is improved, the growth of the rice is promoted, and the yield of the rice is increased. The soil conditioner disclosed by the invention is simple to prepare and environment-friendly to soil, and safe utilization of cadmium-polluted farmland soil can be realized.

The invention discloses a method for cultivating low-cadmium accumulation rice through CRISPRCas9 saturated editing of an OsHMA3 promoter, and belongs to the technical field of crop molecular breeding. According to the method, gene editing is carried out on an upstream 500bp region of an OsHMA3 gene of a rice variety ZH11 through an agrobacterium-mediated transformation method, and on the premise that the agronomic traits of rice are not affected, the cadmium interception capacity of a root system is enhanced, the cadmium accumulation amount in overground parts and grains is reduced, and the yield of the rice is improved. The HMA3-Pro3 mutant does not influence the absorption and accumulation of necessary elements such as zinc, manganese, iron and the like. The invention provides an efficient and safe non-transgenic low-cadmium rice cultivation technology, provides technical support and excellent varieties for safe utilization of cadmium-polluted farmland, and provides a new solution for solving the food safety problem caused by soil cadmium pollution.

The invention discloses a method for oversummering remediation of drought alkaline cadmium polluted farmland soil based on sedum plumbizincicola. The method comprises the following steps: S1, land selection and preparation; s2, applying a soil conditioner; s3, branch selection and pruning; s4, cuttage and field planting; s5, carrying out sun shading; s6, field management; and S7, repairing effect evaluation. The invention provides a set of optimized over-summering cultivation management and cadmium reduction repair technical path aiming at the problems of low survival rate and poor growth of sedum plumbizincicola in a high-temperature drought and alkaline soil environment in summer in a drought area. By regulating and controlling illumination intensity, optimizing water and fertilizer management and applying soil conditioning in a matched mode, stress conditions such as strong light direct incidence in summer, high-temperature steaming and burning and rapid evaporation of soil moisture in the drought area are effectively relieved, and the survival rate and the cadmium removal amount of sedum plumbizincicola in the alkaline cadmium-polluted soil are increased. The technology provides a feasible new way for remediation of the cadmium-polluted soil in the drought region, and has important scientific value and wide application prospect.

The present application belongs to the field of agricultural pest control, and particularly relates to a method for improving the content and insecticidal activity of exogenous insecticidal protein of insect-resistant transgenic cotton. The method is realized by the following steps: maintaining the soil cadmium concentration at 1-5 mg / kg when the cotton is at the three-leaf stage; and maintaining the soil cadmium concentration at 1-4 mg / kg when the cotton is at the five-leaf stage. The method provided by the present application can significantly improve the content and insecticidal effect of exogenous insecticidal protein of insect-resistant transgenic cotton, and enhance the insecticidal activity against cotton bollworms. The method provided by the present application can improve the control effect on pests while controlling cadmium pollution when planting transgenic insect-resistant cotton on land contaminated by a certain concentration of cadmium, and reduce the use of insecticides. Therefore, the present application provides an effective reference for improving the control effect on pests when planting insect-resistant transgenic cotton on land contaminated by cadmium, and has important practical value and significance.

The application discloses a cadmium-resistant proteus mirabilis and application thereof in treatment of composite pollution environment. Priestia megaterium The application provides a PBAT-degrading bacterium, i.e., a proteus mirabilis (S261-3) strain, which can grow at a temperature of 10-50 DEG C and has certain salt and cadmium resistance, and can grow normally in a high-salt or high-cadmium concentration range. Meanwhile, the S261-3 strain has a good PBAT-degrading effect, and can degrade PBAT under cadmium stress, and can be used for degrading plastic pollutants in cadmium-polluted soil. The microbial strain provided by the application has stronger adaptability to a polluted environment, meets the repair demand of a composite pollution site, can be used for comprehensive treatment of microplastic and heavy metal composite pollution, is helpful to improving soil quality and improving land utilization efficiency, and has important practical significance for soil composite pollution repair.

The application is the application of Spirodela and microorganisms in repairing cadmium-polluted water bodies and reducing cadmium content in cadmium-polluted paddy field rice grains. The specific steps are as follows: first, prepare Oscillospiraceae bacterial suspension, Enterobacter bacterial suspension and Pantoea bacterial suspension respectively; then mix the three kinds of bacterial suspensions in proportion to obtain a mixed bacterial suspension; then add the mixed bacterial suspension and Spirodela prepared in proportion to the cadmium-polluted water bodies to be repaired or the cadmium-polluted paddy fields to be repaired, and the Spirodela and the microorganisms form a "Spirodela-functional bacterial community" symbiotic system; the microorganisms further transport cadmium to the leaves by adsorption, transformation, leaf surface sedimentation or transpiration; finally, the Spirodela is concentrated for treatment, thereby repairing the cadmium-polluted water bodies or reducing the cadmium content in the cadmium-polluted paddy field rice grains. Through the application, the cadmium-polluted water bodies can be better repaired, and the cadmium content in the cadmium-polluted paddy field rice grains can be effectively reduced.

The present application belongs to the technical field of environmental remediation and soil ecological engineering, and particularly relates to a modified iron biochar-humus-sulfate-reducing bacteria (SRB) composite system for realizing efficient immobilization and ecological remediation of cadmium (Cd 2+ ) in heavy metal contaminated soil. The system can enhance the stability of microbial colonies and has the characteristics of physical and biological synergistic passivation, thereby realizing long-term stabilization and ecological remediation of heavy metals.

The invention provides a regional soil heavy metal water input type pollution risk assessment method and system, and relates to the technical field of soil pollution risk assessment. Aiming at the problem of insufficient accuracy of existing pollution risk assessment, the method comprises the following steps: acquiring a sub-basin boundary, a cadmium-containing wastewater discharge point, cultivated land distribution data, a grain yield, cultivated land irrigation water consumption and a flood-submerged cultivated land area; calculating a cadmium emission hazard index, an irrigation exposure index, a flood exposure index and a vulnerability index according to the acquired data; after standardization processing is conducted on the key indexes, cadmium pollution risk values of the irrigation approaches and the flood approaches of all the sub-basins are calculated; dividing an irrigation exposure type and a flood exposure type according to a set threshold value, and determining a comprehensive risk type by combining the dual-path risk value; a sensitive analysis model is adopted, the key index is used as an input quantity, the double-path risk value is used as an output quantity, and a sampling and statistical method is set to identify a sensitive factor with the maximum influence of the risk value. According to the method, comprehensive and accurate evaluation of the watershed scale pollution risk is realized.

The invention aims to protect a soil conditioner for extracting magnesium residues from dolomite and a preparation method of the soil conditioner. Residues left after magnesium metal is extracted from dolomite contain medium trace elements such as silicon, calcium, magnesium, iron and the like, and the residues are alkaline. The magnesium refining residues are separately granulated or mixed with dolomite / limestone to be granulated, and the magnesium refining residues are used as a soil conditioner, so that the pH value of soil is increased, the pollution of heavy metal cadmium can be reduced, and a certain yield increasing effect is achieved. According to the method, a large number of by-products generated in the magnesium smelting process are effectively recycled, and the residues are calcined, low in heavy metal content, safe and environmentally friendly. The adopted raw materials are mainly industrial waste residues, the waste residues are zero in cost and only need granulation cost, energy conservation and environmental protection are achieved, the price is greatly reduced, the acceptability of farmers is improved, and wide market space is achieved. Dolomite or limestone is added and forms a long-acting and quick-acting combination with refined magnesium residues, and the long-term soil conditioning effect can be achieved only through one-time application.

The invention relates to the technical field of soil heavy metal remediation, in particular to a humic acid slow-release fertilizer for improving the remediation efficiency of barbadosnut on cadmium-contaminated soil and a preparation method of the humic acid slow-release fertilizer. The fertilizer specifically comprises the following components: polyvinyl alcohol, span 80, urea, calcium hydrophosphate, potassium sulfate, magnesium oxide, humic acid, DA-6, IAA, IBA, EGTA, corn straw compost and the like. The humic acid slow-release fertilizer and the application method thereof, provided by the invention, have remarkable beneficial effects in the aspect of improving the remediation efficiency of the barbadosnut on the cadmium-polluted soil. According to the slow-release fertilizer, humic acid, plant hormones, a metal chelating agent and nutrient elements are scientifically proportioned, and corn straw compost is combined as an organic carrier, so that slow release and efficient utilization of nutrients are realized. The high-activity extraction process of humic acid ensures the strong complexing ability of rich functional groups and heavy metals, and significantly enhances the cadmium absorption and transport ability of jatropha curcas.

This invention discloses a method for enhancing the cadmium accumulation and translocation capacity of *Sedum aizoon*, relating to the field of phytoremediation of heavy metal pollution. The invention includes the following steps: adding a 5 μM selenium ion concentration solution to a cadmium-polluted water environment; planting *Sedum aizoon* seedlings in the cadmium-polluted water environment for cultivation management; plant pretreatment: after culturing *Sedum aizoon* seedlings in unpolluted soil for at least three generations, selecting uniformly sized and healthy *Sedum aizoon* plants for pre-culturing in Hoaglands nutrient solution for two weeks to induce rooting; hydroponic treatment: transferring healthy plants to Hoaglands nutrient solution containing selenium for cultivation, and harvesting the plants after 28 days. This invention, by simulating a high-concentration cadmium-polluted water environment and applying selenium during the growth period of *Sedum aizoon*, promotes the absorption and accumulation of cadmium by *Sedum aizoon*, increases plant biomass, alleviates the toxic effects of cadmium on plants, and achieves efficient remediation of cadmium-polluted environments by *Sedum aizoon*.

The invention discloses a strain of rice endophytic fungus nigrospora oxyspora HLC15. The preservation number of the rice endophytic fungus nigrospora oxyspora HLC15 in the Guangdong Microbiological Culture Collection Center is GDMCC (China General Microbiological Culture Collection Center) No.66882; the strain has relatively strong phosphate solubilizing and IAA (indoleacetic acid) producing capacities and cadmium tolerance, can obviously promote the growth of host plants, increase the chlorophyll content of the host plants and relieve the harm of cadmium pollution to crops under the stress of cadmium when being inoculated with HLC15, and is of great significance in the growth and safe production of the crops in cadmium-polluted soil.

The invention belongs to the technical field of compound microbial fertilizer manufacturing, and discloses a compound functional flora fertilizer formula for cadmium-contaminated soil remediation, which comprises the following steps: atomizing a premixed solution containing a second functional flora vitrification protective agent and an ionic cross-linking agent, applying the atomized premixed solution to a wet organic matrix preloaded with multivalent cations, and carrying out osmotic pressure driving to prepare the compound functional flora fertilizer for cadmium-contaminated soil remediation. According to the method, when a glassy state protection structure is formed around the flora in situ, a gel network is formed at an interface to anchor the flora, microcosmic protection and firm anchoring of the core functional flora are synchronously completed in the wet mixing process of the fertilizer, irreversible physical damage caused by a traditional drying process to the strain is avoided, and the method is suitable for large-scale industrial production. The bacterial strain with strong function and weak environmental tolerance can be applied to the product with high survival rate, and the life rhythm of orderly release of functional flora is formed.

The utility model discloses a screening device for soil cadmium pollution detection, which comprises a device main body, an assembling groove is arranged at the center of the device main body, a lifting frame is assembled in the assembling groove, a driving mechanism in transmission connection with the lifting frame is assembled in an inner cavity of the device main body, and a screening cylinder is assembled in the lifting frame. A sealing cover assembly is assembled between the lifting frame and the screening barrel. The soil screening device is used for screening soil in a laboratory when cadmium pollution of the soil is detected, the driving mechanism is arranged, the lifting frame is driven by the driving mechanism to move up and down in a reciprocating mode, the screening barrel is made to complete screening operation on the soil, and compared with traditional manual screening, the labor intensity of operators can be relieved, and meanwhile the screening efficiency is improved.

This invention discloses a methylbacterium XC1 strain screened from the rhizosphere soil of contaminated paddy fields. Methylbacterium XC1 can stably survive in cadmium-contaminated soil and effectively fix available cadmium in the soil, thereby reducing the content of available cadmium in the soil and achieving effective remediation of cadmium pollution in the soil.