51 results about "Indoleacetic Acids" patented technology

The invention belongs to the technical field of agricultural microorganisms, and particularly relates to rice endophytic sphingosine vector SY02 and application thereof. The preservation number of the rice endophytic sphingobium yanoikuyae SY02 provided by the invention is CCTCC (China Center For Type Culture Collection) NO: M2026182, and the sphingobium yanoikuyae SY02 has the functions of producing indoleacetic acid, promoting plant growth and seed germination, promoting adventitious bud proliferation of tissue culture seedlings and relieving browning. The sphingosine vector bacterium and the microbial agent prepared through strain fermentation have the advantages of being green, safe, efficient, long-acting and the like, and have good application prospects in the aspects of promoting plant growth and seedling breeding.

This invention belongs to the field of microbial technology, specifically relating to a strain of Acetobacter peroxide 672 and its applications. The Acetobacter peroxide 672 strain of this invention can enhance the antagonistic activity of Pichia pastoris against Rhizoctonia solani and also antagonizes Colloidal anthracnose, providing a multi-faceted solution for the biological control of crop diseases. Furthermore, the strain possesses the ability to produce indoleacetic acid, which can significantly promote the growth and development of grain crops such as wheat and corn, promote root expansion, enhance nutrient and water absorption, and thus effectively increase biomass. In addition, the strain can tolerate and degrade chemical pesticide components such as imidacloprid and carbendazim, alleviating soil pesticide residue pollution, and can effectively alleviate the inhibitory effects of low pH stress on crops, enhancing their stress resistance. Therefore, the Acetobacter peroxide 672 strain of this invention has significant application value in the biological control of crop diseases, crop growth promotion, soil pesticide residue remediation, and enhancing crop stress resistance.

The invention discloses a method for increasing the content of genistin and genistein in flemingia philippinensis by using potassium. Culturing the flemingia philippinensis tissue culture seedlings in a propagation culture medium, and subculturing to obtain flemingia philippinensis stem segments with leaves; taking stems of the flemingia philippinensis, and culturing the stems in a rooting culture medium to obtain the flemingia philippinensis with the content of genistin and genistein increased; wherein the propagation culture medium is prepared from MS (Murashige and Skoog), 6-benzyladenine, indoleacetic acid and kinetin; the rooting culture medium comprises KNO3, MS (Murashige and Skoog) and naphthylacetic acid, and the MS does not contain KNO3. According to the method for increasing the content of genistin and genistein in the flemingia philippinensis by using potassium, accumulation of active ingredients of genistin and genistein at the root of the flemingia philippinensis is adjusted by adding exogenous potassium ions, so that the utilization rate of the flemingia philippinensis is increased, and the problem of resource shortage of the flemingia philippinensis is relieved.

This invention discloses a method and application for soil improvement and carbon sequestration enhancement in castor bean cultivation in saline-alkali land, relating to the field of agricultural planting technology. The method includes: planting castor beans in saline-alkali land using an agroforestry model; and spraying exogenous hormones during the seedling, budding, and flowering stages of the castor beans. The exogenous hormones are indoleacetic acid (IAA) or gibberellin, with the IAA and gibberellin spraying concentrations ranging from 50 μM to 200 μM. This method can lower the soil pH in coastal saline-alkali land, improve soil physicochemical properties, and increase soil organic carbon and organic matter content. Simultaneously, it can effectively enhance soil carbon storage, castor bean plant carbon sequestration, and total carbon accumulation. The method has low operating costs, stable improvement effects, and balances the needs of land use and ecological carbon sequestration improvement in saline-alkali land, providing a theoretical basis and technical support for enhancing soil carbon sequestration in coastal saline-alkali land.

The invention relates to the technical field of microorganisms, in particular to a desert plant endophyte, a microbial agent and application, the desert plant endophyte is Pristeria aryabhattai HB-4 and is preserved in the China Center for Type Culture Collection on November 17, 2025, and the preservation number of the desert plant endophyte is CGMCC No.36665. The invention further relates to a method for preparing the desert plant endophyte. The strain can efficiently produce indoleacetic acid and has remarkable growth promoting and stress resistance functions. After the strain is inoculated, the fresh weight, the dry weight, the stem length, the chlorophyll content and the catalase activity of wheat are remarkably improved, and the malondialdehyde content is reduced. The invention further provides a microbial agent containing the strain and application of the microbial agent in the aspects of promoting plant growth and improving stress resistance, the microbial agent is particularly suitable for cultivation of crops such as wheat in drought and barren environments, and a new strain resource is provided for development of agricultural microbial preparations.

The invention relates to a method for improving peony double petal flower types, which belongs to the peony flower type regulation and control technology, indoleacetic acid and a Tween-20 stock solution are used for preparing auxin treatment liquid, the concentration of the indoleacetic acid in the auxin treatment liquid is 25-35 mg.L <-1 >, and the volume concentration of the Tween-20 is 0.04-0.05%; when the flower buds of the peony plants grow to the initial stage of the round peach period, spraying auxin treatment liquid to the whole peony plants by using a pressurized sprinkling can, and performing normal maintenance after spraying; when the flower buds of the peony plants develop to the initial stage of the color exposure period, spraying the auxin treatment liquid to the whole peony plants by using the pressurized sprinkling can again, and maintaining until the peony plants bloom after the auxin treatment liquid is sprayed. By means of the adjusting effect of indoleacetic acid on flower organ development, the growth hormone treatment liquid is quantitatively sprayed in the round peach stage and the initial stage of the color exposure stage, intervention on the petal forming process is achieved on the premise that plant growth and the flowering phase process are not affected, the ornamental characteristic of peonies is effectively enhanced, and the flower quality is improved. The application range of the high-double-petal ornamental variety is expanded, and the commodity value is improved.

The invention provides paenibacillus kuchii as well as a fungicide and application thereof, and relates to the field of microorganisms. The paenibacillus kuchii is specifically paenibacillus kuchii M18, and the preservation number of the paenibacillus kuchii M18 is CGMCC (China General Microbiological Culture Collection Center) No. 36293. The strain can be used for dissolving phosphorus and potassium, fixing nitrogen and secreting IAA (Indoleacetic Acid), and is beneficial to promoting plant growth and improving soil quality; the strain can produce a biological membrane, can effectively isolate the contact between a root system and pathogenic bacteria, and plays a crucial role in preventing and treating various soil-borne diseases; the strain can produce protease and cellulase and promote the growth of plants; the strain can produce a urease inhibitor, inhibit the activity of urease in soil and delay hydrolysis of urea. The strain also shows extremely strong salt tolerance, and is beneficial to exerting a growth promoting effect in saline-alkali soil. The microbial inoculum can be applied to the root of a plant by means of root irrigation, so that the strain is colonized at the root of the plant to play a role in promoting the growth of the plant.

The invention discloses a treating agent for promoting rapid dormancy breaking of cotton seeds as well as a preparation method and application of the treating agent, and belongs to the technical field of crop planting. The treating agent is prepared from the following components: 0.1 to 0.7 mg / L of indoleacetic acid, 0.5 to 2 mg / L of thidiazuron (TDZ), 0.1 to 0.5 percent (m / v) of humic acid modified bentonite, 0.8 to 2.6 percent (m / v) of humus soil and the balance of water. The method has the beneficial effects that the germination index of the treated cotton is increased by 48.89%-77.78% compared with 6.67% of a control group (ck), which indicates that the germination speed of the treated cotton seeds is obviously increased. The cotton germination can be effectively promoted, and possibility is provided for effectively resisting the adverse situation in the cotton seedling stage.

This invention relates to the construction and staining application of recombinant Escherichia coli for synthesizing indoleacetic acid ester. The recombinant Escherichia coli for synthesizing indoleacetic acid ester is obtained by using recombinant Escherichia coli MG1655ΔpheAΔtrpRΔtyrAΔyddGΔarsB::tac70-MaFMOΔldhA::tac70-MaFMOΔyghWX::tac70-tnaAΔpoxB::tac70-cav1 as the initial strain. Then, the endogenous acetylesterase is knocked out, and the endogenous tryptophan hydrolase gene tnaA and the flavin monooxygenase gene maFMO are overexpressed, while simultaneously overexpressing the acetyltransferase gene. The indoleacetic acid ester yield of this invention is as high as 195.3 mg / L. Using indoleacetic acid ester for staining eliminates the need for reducing agents and enzyme solutions, significantly reducing staining costs.

The invention belongs to the technical field of agriculture, and particularly relates to a degerming and seedling formation solution, a preparation method, an application method and a method for promoting seed germination and seedling formation. The degerming and seedling formation solution provided by the invention comprises gibberellic acid, indoleacetic acid, naphthylacetic acid, coptis chinensis and carbendazim, and the combination of coptis chinensis extract, carbendazim and growth hormone (gibberellic acid, indoleacetic acid and naphthylacetic acid) in a specific proportion has a synergistic inhibition effect on alternaria alternata and has a promotion effect on seed germination and seedling formation. The invention provides the preparation method of the degerming and seedling forming solution, and the application is simple. According to the application method of the degerming and seedling forming solution, the operation steps are simple, convenient and efficient, and the seedling forming efficiency is remarkably improved. The result of the embodiment shows that the germination rate of the Sinojackia xylocarpa seeds reaches 100% after the optimal treatment is performed for 15 days, and the survival rate of the seed seedlings reaches 96.67% after the optimal treatment is performed for 30 days.

The invention relates to a meadow alkaline halophilic bacterium LH-SA-1 capable of absorbing sodium and reducing salt and alkali as well as a saline-alkali soil remediation microbial inoculum and application of the meadow alkaline halophilic bacterium LH-SA-1. The LH-SA-1 is separated from severe saline alkali soil in Jilin Baicheng, the classification name of the LH-SA-1 is Alkalihalophilus lindianensis, and the preservation number of the LH-SA-1 is CGMCC (China General Microbiological Culture Collection Center) No. 32707. The LH-SA-1 can tolerate 3%-45% of various salts such as sodium chloride, sodium sulfate, sodium carbonate and sodium bicarbonate and a strong alkali environment with the pH value of 9-12. The granular saline-alkali soil remediation microbial inoculum is prepared through composite sodium ion induced fermentation and double-membrane coupling concentration technologies in combination with a multifunctional carrier, the bacterial quantity is larger than or equal to 200 * 10 < 8 > CFU / g, and the catalase activity is larger than or equal to 130000 U / g. The microbial agent is applied to soda saline-alkali soil or coastal composite saline-alkali soil in northeast China, has multiple functions of remarkably reducing the saline-alkali content of the soil, improving the porosity of the soil, improving the activity of enzymes such as catalase, peroxidase, urease and alkaline phosphatase in the soil, improving the content of indoleacetic acid in the soil and the like, and provides an efficient and low-cost biological solution for saline-alkali remediation.

This invention discloses a method for preparing a new hesperidin, belonging to the field of organic chemical synthesis technology. The method has simple reaction conditions, is safe and environmentally friendly, and can obtain high-purity new hesperidin without purification after the reaction. The method includes the following steps: (1) Take root bark acetylphenyl-4'-β-neohesperidin, add n-butanol, isovalin and 3-indoleacetic acid, and heat to react; (2) After the reaction solution in step (1) has reacted completely, cool down; (3) Filter the cooled solution, wash the solid with n-butanol, and dry to obtain the finished product.

The invention provides a flower fertilizer prepared from traditional Chinese medicine residues and a process thereof, and relates to the technical field of organic fertilizers. The flower fertilizer is prepared from traditional Chinese medicine residues, coffee grounds, soybean meal, rice bran, a synergist, modified montmorillonite and straw, the traditional Chinese medicine residues are prepared from radix angelicae sinensis residues, fructus kochiae residues, radix sophorae flavescentis residues, fructus lycii residues, rhizoma phragmitis residues and herba violae residues, and the synergist is prepared from potassium humate, ammonium molybdate, zinc sulfate, indoleacetic acid and sodium polyacrylate. Through the specific components, dosage and preparation method, the prepared flower fertilizer can significantly improve plant diseases and insect pests, increase the growth speed of flowers and reduce the soil caking rate.

The invention discloses application of indoleacetic acid in diagnosis and treatment of gestational diabetes mellitus. Clinical queue research finds that the concentration of serum indoleacetic acid of pregnant women in a gestational diabetes mellitus group is remarkably lower than that of pregnant women in a healthy control group, and high diagnosis efficiency is achieved. Animal experiments further prove that in a high fat diet induced mouse model with gestational diabetes mellitus, the exogenous indoleacetic acid is supplemented, so that the fasting blood glucose of a female mouse with gestational diabetes mellitus can be reduced, abnormal glucose tolerance and insulin resistance can be improved, and the indoleacetic acid is free of embryotoxicity, safe and reliable. The application provides a new thought and means for early diagnosis and effective treatment of gestational diabetes mellitus, and has a wide application prospect.

The invention discloses a construction method of a novel composite biocontrol flora for preventing and treating cotton verticillium wilt, and relates to the technical field of biological prevention and treatment of agricultural plant diseases. The bacillus polymyxa and the bacillus cereus with the optimal antagonistic activity are respectively screened out through plate confrontation and buckling tests, and the bacillus pseudomycoides is obtained through screening by taking the growth promoting capability of dissolving phosphorus and producing indoleacetic acid as indexes. Through pairwise cross culture verification, the three strains are completely compatible and have no mutual inhibition effect. The method comprises the following steps: respectively and independently activating the three strains, carrying out enlarged culture, preparing single bacterial liquid with the OD600 value of 1.0, and uniformly mixing according to a volume ratio, so as to obtain the novel composite biocontrol flora for preventing and treating the cotton verticillium wilt. According to the invention, antagonistic bacillus and growth-promoting bacillus with complementary functions are screened, single bacteria are independently cultured and then are compounded according to a ratio of 1: 1: 1 to construct a composite flora, so that the synergistic interaction of efficient prevention and control of cotton verticillium wilt, cotton growth promotion and soil phosphorus solubilization is realized.

This invention relates to the application of *H. atlantis lanceolata* LP-1 in the co-production of extracellular polysaccharides and indoleacetic acid (IAA), belonging to the field of microbial technology. *H. atlantis lanceolata* LP-1 was inoculated into a fermentation medium and cultured aerobically to obtain indoleacetic acid and extracellular polysaccharides. *H. atlantis lanceolata* LP-1 was deposited on March 17, 2025, at the China General Microbiological Culture Collection Center (CGMCC), with accession number CGMCC No. 33858. The highest accumulated extracellular polysaccharide concentration of this *H. atlantis lanceolata* LP-1 in the fermentation medium was 10.05 g / L, and the highest IAA concentration was 45.37 mg / L.

This invention belongs to the field of microbial technology, and specifically relates to a highly efficient phosphate-solubilizing bacterium, its preparation method, and its application. The phosphate-solubilizing bacterium is named Pantoea cypripediP11, with the biological preservation number CCTCC NO: M2023159. The highly efficient phosphate-solubilizing bacterium Pantoea cypripediP11 proposed in this invention can convert insoluble phosphorus into soluble phosphorus at a maximum content of 663.59 mg / L, which can increase the available phosphorus content in the soil by 1.46 times. This is stronger than the phosphate-solubilizing ability of the existing phosphate-solubilizing bacterium Burkholderia ubonensis, and it can also produce indoleacetic acid and secrete siderophores to promote plant root growth.

The invention discloses a potassium-dissolving bacterial strain for tomatoes as well as a bacterial agent and application of the potassium-dissolving bacterial strain, the potassium-dissolving bacterial strain is Acinetobacter pittii, the potassium-dissolving bacterial strain is preserved in the China Center for Type Culture Collection, and the preservation number is CCTCC NO: M20252080. The bacterial agent remarkably improves the fresh weight, dry weight and potassium content of tomato plants in a pot experiment, and has the effect of promoting tomato growth; the microbial inoculum can effectively dissolve potassium in soil, significantly increase the content of rapidly available potassium in the soil, and promote absorption and utilization of potassium by tomatoes. In addition, the acinetobacter peteri B6 strain also has multiple beneficial functions of solubilizing phosphorus, producing siderophores, secreting indoleacetic acid (IAA) and the like, and the comprehensive potential of the acinetobacter peteri B6 strain in the aspect of promoting plant growth is further enhanced.

This invention belongs to the field of agricultural microbial applications, specifically a multifunctional bacterium W1. It can induce the formation of a cementitious substance by hydrolyzing urea and amino acids to produce alkali, and simultaneously secretes extracellular polysaccharides and the plant growth-promoting substance indoleacetic acid. Furthermore, it exhibits a synergistic effect with hydrothermal charcoal. It was deposited on October 12, 2024, at the China General Microbiological Culture Collection Center, and the proposed classification name is *Defective Shortwave Monoclonal*. Brevundimonas diminuta The study, numbered CGMCC No.32186, used Bacterium W1, hydrothermal charcoal, inorganic nitrogen fertilizer, human and animal manure, and calcium source as soil conditioners for sandy soil and verified them by planting maize. It showed that the conditioners could promote the cementation of soil particles in sandy soil, increase the number of mechanical and water-stable large aggregates, increase the organic matter content of sandy soil, enhance the water and fertilizer retention capacity of sandy soil, enhance the drought resistance and nutrient absorption capacity of maize, and thus increase maize yield.

The invention belongs to the technical field of aromatic hydrocarbon receptor ligands, and particularly relates to an AHR ligand 5-methoxy-2-methyl-3-indoleacetic acid and application thereof. According to the invention, a compound 5-methoxy-2-methyl-3-indoleacetic acid (MMIA) is used as an aromatic hydrocarbon receptor (AHR) ligand, and the application of the MMIA in the aspects of enhancing the stability of the AHR, promoting the AHR to enter a cell nucleus, relieving colitis and the like is disclosed. The result of the embodiment shows that the MMIA can be specifically combined and activate the AHR; mMIA gavage treatment can play an anti-inflammatory role and effectively relieve colitis symptoms. AHR is a key molecule for regulating and controlling the steady state of the intestinal tract, can inhibit proinflammatory pathways such as NF-kappa B and the like, reduce secretion of proinflammatory factors such as IL-6 and TNF-alpha, and also can repair damaged mucosa, restore the integrity of the intestinal barrier and improve related symptoms of the colitis from the source.

The invention discloses a broad-spectrum saline-alkaline tolerant preristeria sp. Strain and an application of the broad-spectrum saline-alkaline tolerant preristeria sp. The invention provides the P.megaterium or a progeny of the P.megaterium, the P.megaterium is the P.megaterium, the strain number of the P.megaterium is HA22ALE, and the registration number of the P.megaterium in the China General Microbiological Culture Collection Center is CGMCC (China General Microbiological Culture Collection Center) No. 36160. The strain HA22ALE provided by the invention has broad-spectrum salt and alkali tolerance, can normally grow under the conditions of 11.0% of sodium chloride, 7.0% of sodium sulfate and pH of 6.0-11.0, has growth promoting characteristics of indoleacetic acid production, potassium dissolving capacity and the like, and can inhibit the growth of plant pathogenic fungus fusarium oxysporum. Under the stress of salt and alkali, the strain can be effectively colonized in the rhizosphere of a plant, and the germination rate and biomass of soybeans and corns are remarkably improved.

The invention discloses application of pseudomonas, and belongs to the field of microorganism application. The bacterial strain is preserved in the China General Microbiological Culture Collection Center (CGMCC) on November 28, 2025, the preservation number is CGMCC NO.36820, the bacterial strain belongs to Pseudomonas sp., and the name of the bacterial strain is Pseudomonas T9. The invention also discloses a preparation method of the bacterial strain. The strain has the capabilities of fixing nitrogen, producing ammonia and dissolving phosphorus, can secrete siderophores, indoleacetic acid (IAA) and protease, and has the function of promoting growth of various plants.

This invention discloses a salt-tolerant Bacillus zanthoxyli strain and its applications, belonging to the field of microbial technology. The Bacillus zanthoxyli RX10 strain of this invention, with the accession number CCTCC M 20242733, integrates multiple functions such as salt tolerance, growth promotion, nitrogen fixation, phosphorus solubilization, potassium solubilization, iron carrier production, indoleacetic acid production, control of grape powdery mildew, and soil improvement. It is a multifunctional plant endophytic bacterium, which is of great significance for promoting growth, preventing disease, and improving soil in saline-alkali conditions.

The invention belongs to the technical field of environmental restoration, and particularly relates to cyclodextrin hybrid supramolecular hydrogel as well as a preparation method and application thereof. A construction unit of the cyclodextrin hybrid supramolecular hydrogel comprises quaternary ammonium salt modified beta-cyclodextrin and hectorite which interacts with the quaternary ammonium salt modified beta-cyclodextrin in an electrostatic manner; plant hormones are included in a cavity of the quaternary ammonium salt modified beta-cyclodextrin. The cavity of the quaternary ammonium salt modified beta-cyclodextrin can effectively include plant hormones such as indoleacetic acid, and then the supramolecular hydrogel is formed through electrostatic interaction between the hectorite and the quaternary ammonium salt modified beta-cyclodextrin. The supramolecular hydrogel adhesive tape provided by the invention has charges and cavities, can include various plant hormones, has the effects of regulating soil salinity and promoting plant growth, and has a synergistic effect with plants in a saline-alkali soil improvement technology to improve the improvement effect. The hydrogel disclosed by the invention is based on multiple non-covalent interaction, has the advantage of controllably releasing plant hormones, and is cooperated with plant remediation to realize sustainable environmental remediation.

The invention relates to streptomyces PG-1 and application thereof, the streptomyces PG-1 is a multifunctional microbial strain, can effectively utilize microorganisms to solve the problem of polycyclic aromatic hydrocarbon environmental pollution remediation, can promote plant growth and development, and can improve microorganism-plant dual remediation effects. The invention discloses streptomyces sp. Which is classified and named as streptomyces sp. And is preserved in the China General Microbiological Culture Collection Center on November 20, 2024, the preservation number is CGMCC No.32722, and the preservation address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. In polycyclic aromatic hydrocarbon degradation, when pyrene is a unique carbon source, the pyrene degradation rate of the streptomyces PG-1 can reach 30% after 15 days; meanwhile, the strain has the capacity of producing indoleacetic acid, the yield of the indoleacetic acid reaches 17.27-26.67 mg / L, the strain can promote plant growth and development, the effect is good, efficiency is high, and the strain has actual application and popularization value.

This invention discloses a strain of *Bosea vestrisii* and its application in promoting plant growth and improving salt tolerance. This strain is deposited at the China Center for Type Culture Collection (CCTCC) under accession number CCTCC M 2026307. *Bosea vestrisii* exhibits strong salt tolerance and possesses multiple growth-promoting functions, including secreting indoleacetic acid (IAA), synthesizing extracellular polysaccharides, and biological nitrogen fixation. Experiments show that applying this strain to wheat roots significantly increases plant height, root length, and biomass under salt stress, and enhances the activity of antioxidant enzymes (such as catalase, peroxidase, and superoxide dismutase) in the plant, effectively alleviating oxidative damage caused by salt stress. This invention provides a highly efficient and environmentally friendly microbial resource for improving saline-alkali soils, enhancing crop stress tolerance, and achieving sustainable agriculture.

The invention provides a suberect spatholobus stem cutting planting method, and relates to the technical field of plant cutting seedling raising. The cuttage planting method comprises the steps that caulis spatholobi cuttage branches are disinfected and then soaked with rooting liquid prepared from stenotrophomonas maltophilia plant fermentation post-treatment liquid, indoleacetic acid, salicylic acid and rice milk, and then cuttage seedling raising is conducted. According to the method, the defects in the prior art are overcome, the fermentation conditions of the stenotrophomonas maltophilia are optimized, sterilization treatment is conducted at the same time, the sterilized post-treatment liquid is obtained and serves as a main functional component of the rooting liquid, early rooting of the caulis spatholobi cutting seedlings is effectively promoted, the overall survival rate is increased, and the cost of the caulis spatholobi cutting seedlings is reduced.

The invention relates to application of Allmann bacillus LP-1 in co-production of exopolysaccharide and indoleacetic acid, and belongs to the technical field of microorganisms. The method comprises the following steps: inoculating a fermentation culture medium with Allmann bacillus LP-1, and carrying out aerobic culture to obtain indoleacetic acid and exopolysaccharides; according to the present invention, the subsp. Hllmann LP-1 is preserved in the China General Microbiological Culture Collection Center (CGMCC) on March 17, 2025, and the preservation number is CGMCC No.33858; the maximum of exopolysaccharide accumulated in a fermentation culture medium by the subterranean bacillus Hellman LP-1 is 10.05 g / L, and the maximum of IAA concentration is 45.37 mg / L.

The invention discloses bacillus velezensis WNL109-2 for preventing and treating a lotus rot disease and an application of the bacillus velezensis WNL109-2. The bacillus velezensis WNL109-2 is used for preventing and treating the lotus rot disease. The strain is preserved in the China Center for Type Culture Collection, and the preservation number is CCTCC NO: M 20252604. The bacillus velezensis disclosed by the invention has a relatively strong antagonistic effect on pathogenic bacteria (Fusarium commune) of the lotus rot disease, and meanwhile, the bacillus velezensis has the capabilities of fixing nitrogen, dissolving phosphorus, secreting protease and generating indoleacetic acid (IAA). Pot experiments show that the strain not only can effectively reduce the morbidity of the lotus rot disease, but also can significantly promote the growth of root systems and plants of lotus seedlings. The invention provides an excellent microbial strain resource for green prevention and control of diseases and reduction of chemical fertilizer application in lotus root planting.