50results about How to "Little impact on the ecological environment" patented technology

The invention discloses a multifunctional composite carpet comprising three-dimensional warp knitting fabric composed of a top layer, a bottom layer and a connecting layer connecting the top layer and the bottom layer. The top layer, the bottom layer and the connecting layer enclose to form a cavity. The multifunctional composite carpet is characterized in that composite which can be solidified is filled in the cavity, the top layer is made of mesh fiber fabric, the bore diameter of each mesh of the mesh fiber fabric ranges from 0.02mm to 60mm, and the meshes in the top layer are in regular or irregular shapes. The multifunctional composite carpet and the ditch construction technology thereof have the advantages of good overall performance, environment friendliness, flexibility in application, convenience in using, mounting, demounting and transporting; the solidified composite can form special materials of mesh composite concrete layer with serialized functions and having certain thickness and hardness; the ditch construction technology is simple in technology, convenient to construct, high in efficiency, good in overall performance and attractive in appearance.

The invention discloses a novel tunnel type nature fishway imitated fish-barring lifting device and relates to a fish passing facility for solving the upstream going problem of migratory fishes through a building across a river. The tunnel type nature fishway imitated fish-barring lifting device comprises a fishway inlet, a fishway inlet section, a tunnel connecting the inlet section with an outlet section, a fishway outlet and a fishway outlet section, wherein the fishway inlet and the fishway inlet section are connected with a downstream waterbed, the fishway outlet and the fishway outlet section are connected with an upstream reservoir. The tunnel type nature fishway imitated fish-barring lifting device comprises a fish-barring electric grid and a fish barring and collecting transfer system of a lifting transfer device. The tunnel type nature fishway imitated fish-barring lifting device is adopted for a water conservancy and hydropower junction in a high-mountain and defile region, can adapt to substantial change of reservoir water level and narrow-riverbed terrain, provides water temperature, flow and flowing speed suitable for migration of the migratory fishes, can simulate a natural aquatic environment of the river and decreases the excavated volume more remarkably, and no artificial high and steep slope is formed. In addition, a tunnel type imitated nature fishway is smaller in occupied area, water and soil loss caused by open cutting is reduced, and the influence on the ecological environment including terrestrial plants, animals and the like is smaller.

The invention provides a channel engineering ecological environment influence multi-level comprehensive index system architecture. The method belongs to the technical field of ecological environment influence evaluation, wherein the four levels have a step-by-step inclusion relationship; the system comprises four influence process index subsystems, a 15-class influence type index module, 39 sets of impact factor indicators and a plurality of single-factor classification sub-item indexes are provided; an ecological environment influence path based on mechanism analysis and key indexes in mitigation countermeasure evaluation are systematically integrated; the transverse main framework covers the navigation channel project and affects the operation activities of the related areas; living environment change, species activity, ecological influence whole-process action mechanism, influence type depiction is carried out through a longitudinal main framework. Influence factor and single factorclassification item index fine description and analysis are carried out through transverse and longitudinal branch structures, and systematic display of channel engineering ecology influence evaluation results and identification, design, monitoring, investigation, analysis and evaluation of ecological channel construction key indexes are facilitated.

The invention provides alkaline powder for treating leaked sulfuric acid and a preparation method of the alkaline powder. The alkaline powder is prepared from a neutralizer, an aid, a heat absorbent, a moisture-proof agent, a dispersant and an indicator in a certain ratio by a specific method. The raw materials for preparing the alkaline powder are readily available; the preparation method is simple, convenient and low in energy consumption; and the prepared powder does not cake, and is low in moisture absorption and good in settling performance after being sprayed. The alkaline powder can be used for effectively treating the leaked sulfuric acid of which the concentration is 50 to 98 percent or more; and the treatment process has the characteristics of high response speed, low temperature rise, secondary harm prevention, simplicity and convenience in endpoint judgment and the like.

The invention belongs to the field of biopesticides and discloses a pseudomonas fluorescens and a biological preparation and an application in preventing and controlling sugarcane smut. The pseudomonas fluorescens is named as pseudomonas fluorescens HN58 which is preserved in China Center for Type Culture Collection on October 24, 2014, wherein the address is Wuhan University, Wuhan and the preservation number is CCTCC No: M2014511. The strain is separated from rhizosphere soil of sugarcane and can be suitable for local natural environment. The strain has a relatively good inhibiting effect on sugarcane smut and is environment-friendly and non-toxic in source and less in influence on ecological environment; the culture condition is low in requirement, and the pseudomonas fluorescens has very good development and application prospects.

The invention discloses an electrothermal energy storage system. The electrothermal energy storage system comprises a heat pump system, a heat-storage and cold-storage system and a heat engine system, wherein the heat pump system comprises a motor, a compressor, a heat-storage heat exchanger and a cold-storage heat exchanger; and the heat-storage and cold-storage system comprises a low-temperature storage tank, a high-temperature storage tank and a normal-temperature storage tank. By the system, electric power can be stored. Moreover, the electrothermal energy storage system is small in occupied space, does not depend on petrochemical fuels, and has little influence on an ecological environment.

The invention belongs to the technical field of biological prevention and control of plant diseases, and discloses Trichoderma koningiopsis and an application thereof in prevention and control of litchi anthracnose. The strain has a name of Trichoderma koningiopsis TJ5, is preserved in Guangdong Microbial Culture Collection Center, called GDMCC for short, on August 8th, 2020 at Guangdong instituteof microbiology, floor 5, building No.59, courtyard No.100, Xianlie Middle Road, Guangzhou, and has a preservation number of GDMCC No:61129. The strain is antagonistic bacteria screened from Litchi chinensis Sonn, a series of similar survival mechanisms are formed due to long-term coexistence and reciprocal symbiosis of the strain and the Litchi chinensis Sonn, Litchi chinensis Sonn diseases areprevented and treated by utilizing the strain, and the strain is safer and more reliable for eating of the Litchi chinensis Sonn and products processed from the Litchi chinensis Sonn; and the strain has an excellent inhibition effect on litchi anthracnose bacteria, is strong in antibacterial ability, and has important practical significance for preventing and treating the litchi anthracnose.

The invention provides a method for analyzing the content of hexavalent chromium in coal ash through an ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer) method, and relates to the technical field of analyzing testing methods. The method comprises the steps: performing microwave alkaline digestion on a coal ash sample, co-precipitating to separate trivalent chromium, and measuring the content of hexavalent chromium through the ICP-OES. The method has the characteristics of being fast to analyze, high in sensitivity, high in accuracy and precision, small in matrix interference, and wide in linear scope; the average recovering rate reaches 87.2%; and the detection limit is low to 0.00033 mcg / ml.

The invention discloses a mangrove forest defoliator prevention method. The method is characterized by comprising steps of plant selection, prevention time selection, saline preparation, spraying prevention and post-spraying processing. A mangrove forest plant damaged by defoliator is selected; saturated saline solution is sprayed when a crown layer is exposed on the ebb; after the saline is sprayed on leaves, the defoliator stops eating, pupating in advance or is poisoned to dead after taking in the saline; and various mangrove forest defoliator can be prevented by the spraying of high-concentration saline in a saturated dissolved state. The mangrove forest defoliator prevention method is simple and easy to operate; raw material can be easily achieved; low cost is required and great insecticidal effect can be achieved; survival rate of the mangrove forest can be improved; and the mangrove forest defoliator prevention method is suitable for promotion and application and has great economic, social and ecological benefits.

The invention belongs to the field of water conservancy projects and environmental protection projects, and relates to a tunnel type multi-outlet nature-like fish way. A fish way body is connected to a downstream riverbed and the water area of an upstream reservoir and is arranged in a mountain beside a power station plant; a fish way inlet of the fish way body is formed in the riverbed in the downstream direction of the power station plant, and two or more fish way outlets of the fish way body are formed in the reservoir in the upstream direction of the power station plant and are located at different heights. The tunnel type multi-outlet nature-like fish way can adapt to the geographical condition that riverbeds are narrow and mountains on the two sides of river ways are high and steep or the limiting condition that the water levels of reservoirs in the upstream direction fall or rise rapidly or water-passing water levels are large in amplitude, the shortcomings that the construction workload of fish ways is large, the design and construction difficulty is high and the cost is high are overcome, and the influence to the terrestrial organisms on the mountains on the two sides of the river ways is reduced as much as possible.

The invention provides a purifying method for rainwater runoff pollutants and a purifying material containing activated carbon. The purifying method comprises the following steps: water-purifying filter material activated carbon and porous cement concrete aggregate are added for purifying the rainwater runoff pollutants, and the water-purifying filter material activated carbon is laid under the porous cement concrete aggregate, wherein the rainwater runoff pollutants include suspension pollutants, ammonia nitrogen pollutants and total phosphorus pollutants, and the purifying material comprisesthe porous cement concrete aggregate and the activated carbon laid under the porous cement concrete aggregate. According to the invention, the purification effect of the porous cement concrete aggregate on the rainwater runoff pollutants can be improved after the water-purifying filter material activated carbon is added, and in particular, the purification effects on the ammonia nitrogen pollutants and the total phosphorus pollutants are both greatly improved. Therefore, the purification method can directly and effectively improve the purification effect of the porous cement concrete, and canbe flexibly applicable to the environments of different pollutants, so that the pollution problem of runoff sewage can be effectively solved.

The invention discloses an expendable pattern graphite chilling gravity casting technology for railway cast steel wheels, and the expendable pattern graphite chilling gravity casting technology integrates an expendable pattern casting technology and a graphite chilling technology. A formed graphite ring is prepared and fixed in an expendable pattern casting sand box with bolts, and a formed casting head foam pattern and a wheel foam pattern are bonded, and then placed in the graphite ring; an expendable pattern casting sand box is filled with dry sand; through compaction by vibration, a wheelis formed by casting with a bottom pouring ladle under the set negative pressure; the problems of water glass sand regeneration and low recovery rate in the traditional casting technology for the railway cast steel wheels are solved, and the consumption of quartz sand and discharge of waste sand are reduced effectively; and the casting technology facilitates of controlling the wheel manufacturingcost and reducing the influence on ecological environment.

The invention relates to a method for preparing polysaccharide selenium copper having a bactericidal effect and belongs to the field of macromolecule complexation. Polysaccharide is co-heated with seleninic acid in a faintly acid aqueous solution to generate polysaccharide selenide; under neutral conditions, and the polysaccharide selenide and copper ions are processed through a co-heating method to prepare a polysaccharide selenium copper complex. The complex can be used as a food antimicrobial agent, a functional bio-fertilizer or a plant fungicide and have a bactericidal effect of selenium and copper, polysaccharide has effects of growth promotion, stress resistance, antivirus and property of film forming on plant surfaces, and the polysaccharide selenium copper can perform sterilization, prevent disease and promote crop growth.

The invention belongs to the technical field of plant disease biocontrol, and discloses a strain of bacillus altitudinis XJGS-4 and an application thereof in prevention and treatment of peronophythoralitchii. The bacillus altitudinis is named as bacillus altitudinis XJGS-4, is preserved in Guangdong Microbial Culture Collection Center (GDMCC for short) at Guangdong Institute of Microbiology, 5 floor, No.59 building, No.100 courtyard, Xianlie Middle Road, Guangzhou City, has the preservation number of GDMCC No:60698, and is preserved on June 17, 2019. The obtained bacillus altitudinis comes from rhizosphere soil of healthy litchi chinensis sonn fruit trees, is mutually symbiotic with litchi chinensis sonn for a long time, and avoids the possibility of damaging of the stability of a micro ecological environment on a plant surface; the bacillus altitudinis and a biological preparation based on the bacillus altitudinis have a strong inhibitory effect on peronophythora litchii, and have agood prospect of development and application.

The invention provides a purifying method for rainwater runoff pollutants and a purifying material containing zeolite. The purifying method comprises the following steps: water-purifying filter material zeolite and porous cement concrete aggregate are added for purifying the rainwater runoff pollutants, and the water-purifying filter material zeolite is laid under the porous cement concrete aggregate, wherein the rainwater runoff pollutants include suspension pollutants, ammonia nitrogen pollutants and total phosphorus pollutants, and the purifying material comprises the porous cement concreteaggregate and the zeolite laid under the porous cement concrete aggregate. According to the invention, the purification effect of the porous cement concrete aggregate on the rainwater runoff pollutants can be improved after the water-purifying filter material zeolite is added, and in particular, the purification effects on the ammonia nitrogen pollutants and the total phosphorus pollutants are both greatly improved. Therefore, the purification method can directly and effectively improve the purification effect of the porous cement concrete, and can be flexibly applicable to the environments of different pollutants, so that the pollution problem of runoff sewage can be effectively solved.

The invention relates to a pyriproxyfen synthesis method. A synthesis route is formed by three-step reaction including that (1) reaction between phenol and parachlorophenol is performed under the action of potassium hydroxide and methyl benzene to obtain p-phenoxyphenol; (2) reaction between p-phenoxyphenol and epoxypropane is performed under the action of potassium hydroxide to obtain 1-(4-phenoxyphenoxy)2-propanol; (3) reaction between 1-(4-phenoxyphenoxy)2-propanol and 2-chloropyridine is performed under the action of potassium hydroxide and methyl benzene to obtain pyriproxyfen. The pyriproxyfen which belongs to novel juvenoid insecticides is a phenyl ether type insect growth disturbance insect growth regulator and has advantages of systemic transfer activity, low toxicity, long acting duration, safety to crops, low toxicity to fishes, low influences on ecological environment. The pyriproxyfen synthesis method is simple and convenient and easy for industrial production.

The invention belongs to the technical field of biological prevention and treatment of plant diseases, and discloses litchi endophytic burkholderia gladioli and an application of the litchi endogenousburkholderia gladioli in prevention and treatment of litchi anthracnose and litchi downy blight. The name of the bacterial strain is Burkholderia gladioli SZPT16, and is preserved in Guangdong Province Microbial Culture Collection Center, GDMCC for short, in Guangzhou Institute of Microbiology, the address is Institute of Microbiology, Guangdong Province, 59 # building, 100 # courtyard, Xianlie Middle Road, Guangzhou, the preservation number is GDMCC No: 61168, and the preservation time is August 25, 2020. The strain disclosed by the invention is derived from litchi endophytic bacteria, and the strain and a biological agent thereof both have a strong inhibition effect on litchi anthrax bacteria and peronophythora litchi bacteria, and have an excellent biocontrol effect; and the product isenvironment-friendly and non-toxic in source, is safer and more reliable to eat litchi and processed products thereof, and has good development and application prospects.

The invention relates to a benzothiostrobin-containing and dimethomorph-containing bactericidal composition and an application of bactericidal composition. The composition is composed of active ingredients and pesticide preparation auxiliary ingredients, wherein the active ingredients are composed of dimethomorph and benzothiostrobin in a weight ratio of (0.1 to 10):1. According to the composition disclosed by the invention, benzothiostrobin and dimethomorph are compounded in a certain ratio range, so that firstly, a remarkable synergistic effect is obtained, and the medication times are reduced, so that the cost is saved; secondly, the two active ingredients in the bactericidal composition are two types of bactericidal agents with different action mechanisms, thus expanding a prevention and treatment spectrum, slowing down the generation of medicine resistance, and prolonging the service life of the medicament; thirdly, the active ingredients of the composition are both high-efficiency, low-toxicity and environment-friendly pesticides, and slightly influence the ecological environment.

The invention discloses movable river and lake water body and bottom mud treatment equipment. An ultraviolet lamp tube is ingeniously installed in a water pumping output pipe to achieve photocatalysis of chemical agents, the use amount of the chemical agents and the influence on the ecological environment of the water body are reduced, meanwhile, the installation space is not additionally increased due to the arrangement of the ultraviolet lamp tube, and the problem of installation space limitation of movable river and lake water and bottom mud treatment equipment is solved; the water body mixed with the chemical agents is discharged into rivers and lakes through a stirring pipe, a movable ship body is driven to move on the rivers and lakes, the water body mixed with the chemical agents is discharged into different point locations of the rivers and lakes, and meanwhile the chemical agents, the river and lake water body and bottom mud are fully stirred and mixed; and by adjusting the depth of the stirring pipe extending into the river and lake water body, the water body mixed with the chemical agent is discharged into water bodies and bottom mud of different depths of rivers and lakes, so that the chemical agent is fully mixed and make contact with the river and lake water body and the bottom mud, the dosing is more flexible, and the dosing uniformity is ensured.

The invention provides a high-temperature-resistant flame-retardant battery diaphragm, and a preparation method and an application thereof. The high-temperature-resistant flame-retardant battery diaphragm comprises nano cellulose fibers and basalt fibers, wherein the mass fraction of the nano cellulose fibers is 99%-60%, and the mass fraction of the basalt fibers is 1%-40%. The diaphragm preparedby optimally combining the nano cellulose fibers and the basalt fibers gives play to the advantages of the nano cellulose fibers and the basalt fibers, has high porosity, good electrolyte wettabilityand excellent heat resistance and mechanical properties, and can improve the rate capability, prolong the service life and improve the safety of the battery.

The invention provides a purification method of rainwater runoff pollutants and a purification material containing quartz sand. The purification method comprises: the rainwater runoff pollutants are purified by adding water purification filter material quartz sand and porous cement concrete aggregate; the water purification filter material quartz sand is laid below the porous cement concrete aggregate; the rainwater runoff pollutants comprise suspended solids, ammonia nitrogen pollutants and total phosphorus pollutants; and the purification material comprises the porous cement concrete aggregate and the quartz sand laid below the porous cement concrete aggregate. By adding the water purification filter material quartz sand, the purification effect of the porous cement concrete aggregate onthe rainwater runoff pollutants is improved, especially the purification effect on the ammonia nitrogen pollutants and the total phosphorus pollutants is greatly improved. Therefore, the purificationmethod can directly and effectively improve the purification effect of the porous cement concrete, and can flexibly cope with the environment of different pollutants, thereby effectively alleviatingthe pollution problem of runoff sewage.

The invention belongs to the field of underground water pollution repair, and particularly relates to a device and a method for repairing chromium contaminated underground water through electromotive force. The device comprises a water feeding system, a main body reaction system and a water discharging system which are sequentially connected; contaminated underground water enters the main body reaction system through a hydraulic system and is subjected to organic acid reinforced electromotive force treatment; simulated contaminated dynamic underground water generates hydraulic gradient in a reaction region through a water level difference between overflowing water tanks at two sides so that the flow rate is controlled; after entering the reaction region, the chromium contaminated underground water stands, then serves as an electrolyte to pass through the reaction region and is mixed with a citric acid solution, chromium ions in the contaminated underground water are ceaselessly desorbed out from the underground water in the repairing process under the effect of constant direct currents and are removed from the underground water under the effect of electric field force, so that the treatment of the chromium contaminated underground is realized. The technology of the device has the characteristics of high heavy metal removal rate of above 95%, no secondary pollution, easiness in pollution and the like.

The invention discloses a mangrove forest defoliator prevention method. The method is characterized by comprising steps of plant selection, prevention time selection, saline preparation, spraying prevention and post-spraying processing. A mangrove forest plant damaged by defoliator is selected; saturated saline solution is sprayed when a crown layer is exposed on the ebb; after the saline is sprayed on leaves, the defoliator stops eating, pupating in advance or is poisoned to dead after taking in the saline; and various mangrove forest defoliator can be prevented by the spraying of high-concentration saline in a saturated dissolved state. The mangrove forest defoliator prevention method is simple and easy to operate; raw material can be easily achieved; low cost is required and great insecticidal effect can be achieved; survival rate of the mangrove forest can be improved; and the mangrove forest defoliator prevention method is suitable for promotion and application and has great economic, social and ecological benefits.

The invention discloses a compounded rice insecticide which comprises the following component raw materials: thiazolone, validamycin, a celastrus angulatus microemulsion, azadirachtin emulsion oil, illicium verum essential oil, cedar essential oil, bacillus thuringiensis, chitosan, aids, a stabilizer and the balance of a 90% ethanol solution. Due to adoption of the thiazolone, the validamycin, thecelastrus angulatus microemulsion and the like as basic components which are compounded with the bacillus thuringiensis, the chitosan, the illicium verum essential oil and the like, the compounded rice insecticide disclosed by the invention has both an insecticide function and a sterilization and anti-bacterium function, has killing synergism upon bacterial streak diseases of rice, insects of bacterial blight diseases, rice leaf folders, pink rice borers, chilo suppressalis, tryporyza incertulas and the like, and in addition is good in specificity, harmless to crops, safe to use and small inecological environment influence.

The invention discloses a lost foam-graphite chilling-antigravity casting process for railway cast-steel wheels. The lost foam-graphite chilling-antigravity casting process integrates lost foam casting technology, graphite chilling casting technology and antigravity casting technology into one. According to the process, a graphite ring ready to mold is fixed in a lost foam casting sandbox via bolts; prepared and molded riser foam and wheel foam patterns are bonded with an assembly of an ingate, a casting pipe, a stopper plug and a stopper rod and are then put in the graphite ring; the lost foam casting sandbox is filled with dry sand and is then connected with a negative pressure device after vibration compaction; the sandbox is put on the top of the cover of a prepared pressure tank; a riser tube arranged on the cover of the pressure tank is communicated with the casting pipe; a steel ladle is arranged in the pressure tank; the riser tube is inserted into the steel ladle; air or inertgas is pressed in the pressure tank; and wheel casting is carried out. The lost foam-graphite chilling-antigravity casting process provided by the invention overcomes the problems of the low recoveryand utilization rate of sodium silicate sand in conventional production processes for railway cast-steel wheels, influence of high waste-sand discharge on surrounding ecological environment and secondary oxidation of molten steel caused by casting of bottom-pouring ladles.

The invention discloses a bidirectional fish-passing ship lock and an operation method thereof. The ship lock comprises a ship lock chamber, an upper lock head, a lower lock head, an upstream navigation wall, a downstream navigation wall, an upstream gate, a downstream gate, an upstream water conveying gallery, an upstream water conveying gallery gate, a downstream water conveying gallery and a downstream water conveying gallery gate. A fish luring lamp and a fish expelling lamp are arranged in a wall body of the lock chamber; the fish luring lamps are arranged in the upstream navigation walland the downstream navigation wall; and the fish luring lamps and the fish expelling lamps are arranged on the upstream gate and the downstream gate, underwater monitoring equipment are arranged at tail ends of the upstream navigation wall and the downstream navigation wall, and fish passing counting equipment are arranged in the upstream navigation wall and the downstream navigation wall. Two-wayfish passing is achieved through the ship lock and an additional device of the ship lock, the ship lock and a fishway are combined into a whole, meanwhile, a function of sluicing of the water lock can be achieved under the condition that there is no ship which navigates through the ship lock, and investment cost is saved. The ship lock is simple in structure, suitable for construction of a newly-built ship lock and transformation of a built ship lock, convenient to manage and cheap to popularize and use.

The invention provides a method for restoring vanadium-ore-polluted soil with bacillus-subtilis-reinforced Indian rorippa herbs and relates to the method for restoring the vanadium-ore-polluted soil. A first method for restoring the vanadium-ore-polluted soil with the bacillus-subtilis-reinforced Indian rorippa herbs includes the steps that (1) a bacillus subtilis bacterium agent is mixed with water to be prepared into a bacterium liquid, and Indian rorippa herb seeds are soaked in the bacterium liquid; (2), the Indian rorippa herb seeds are taken out, dried in air and sowed in the vanadium-ore-polluted soil, and after restoring is performed for certain time, the Indian rorippa herbs are removed out of the soil as a whole. A second method for restoring the vanadium-ore-polluted soil with the bacillus-subtilis-reinforced Indian rorippa herbs includes the steps that in the sprouting stage of the Indian rorippa herbs, the bacillus subtilis bacterium agent is mixed with the water to be prepared into the bacterium liquid, the bacterium liquid is sprayed into the vanadium-ore-polluted soil, after restoring is performed for certain time, the Indian rorippa herbs are removed out of the soil as a whole. In the growth process of the Indian rorippa herbs, vanadium and associated heavy metal of the vanadium in the soil are transferred into the Indian rorippa herb plant bodies gradually, and the vanadium and the associated heavy metal of the vanadium in the soil are finally removed by removing the Indian rorippa herbs out of the soil as a whole. The method is used for restoring the vanadium-ore-polluted soil.

The invention discloses application of octyl methoxycinnamate in prevention and control of pine wood nematodes. Octyl methoxycinnamate has high killing activity for pine wood nematodes, is environmentally-friendly, nontoxic and little in influence on the ecological environment, and has preferable development and application prospects.

The invention relates to the field of biotechnology and specifically discloses an alcaligenes faecalis strain Box-4 and its application. The alcaligenes faecalis strain Box-4 was collected in China Center for Type Culture Collection on March 12th, 2013, and the collection number is CCTCCNO:M2013090. The alcaligenes faecalis strain Box-4 is inoculated to a LB fluid medium with pH 7.0 and shake cultivation is carried out at 200r / min at 28 DEG C for 48h to obtain a biological agent. The biological agent has a strong effect of inhibiting Xanthomonas oryzae pv. oryzae and / or Xanthomonas oryzae pv. oryzicola and / or Ralstonia solanacearum, and sources of the biological agent are environmentally friendly, have no toxicity and have little influence on the ecological environment. In addition, the biological agent has low requirements on culture conditions, has a bacteriostatic effect on various pathogenic fungi, and has a good development and application prospect.