233results about How to "Fast growth" patented technology

The invention discloses lactococcus gasseri C6a2 and application thereof. The preservation number of the lactococcus gasseri C6a2 is CGMCC (China General Microbiological Culture Collection Center) NO: 31024; the 16S rRNA (ribosomal Ribonucleic Acid) gene sequence of the lactococcus gasseri C6a2 is as shown in SEQ ID NO: 1. The bacterial strain is a macrobrachium rosenbergii intestinal absolute dominant bacterium, has a typical probiotic function, is high in growth speed and activity, can quickly enter a logarithmic phase, has relatively high acid production and acid resistance, can secrete lipase, has relatively high bacteriostatic activity on staphylococcus aureus, aeromonas hydrophila and aeromonas veronii, and can be used for preparing the macrobrachium rosenbergii. The bacterium can be used for preparing a special probiotic preparation for macrobrachium rosenbergii, so that the sustainable development of the macrobrachium rosenbergii industry in China is promoted.

The invention discloses bacillus subtilis Gxunw-30 and application thereof, and belongs to the technical field of agricultural microorganisms. The bacillus subtilis Gxunw-30 provided by the invention is preserved in Guangdong Microbial Culture Collection Center on October 12, 2024, and the preservation number of the bacillus subtilis Gxunw-30 is GDMCC No: 65245. The bacillus subtilis Gxunw-30 provided by the invention has the capability of inhibiting plant pathogens in a broad spectrum, and can be used for antagonizing a variety of plant pathogens such as helminthosporium triticum, trichosporon pseudoacaceae, hechiense fusarium, fusarium chlamydosporum, cryphonectria parasitica, fusarium pseudograminearum, botryosphaeria dothidea and the like. The strain has the properties of decomposing organophosphorus, producing protease, producing ammonia, producing indole and fixing nitrogen, and has the biological properties of plant growth promotion and the like. The recombinant bacterium also contains a gene for coding an antibacterial substance, and has the capability of synthesizing the antibacterial peptides of iturin, surfactin, fengmycin and bacilysin, and the recombinant bacterium also contains a gene for coding the antibacterial substance and has the capability of synthesizing the antibacterial peptides of iturin, surfactin, fengmycin and bacilysin. The strain has the effects of preventing diseases and promoting growth, provides a good biocontrol resource for prevention and treatment of plant diseases, and has a relatively good application value for research and development of plant growth-promoting preparations and biocontrol microbial agents.

The invention relates to the technical field of environment-friendly biological rare earth recovery, in particular to a Pristia megaterium MeR-2 and a method for leaching rare earth elements in waste by using the Pristia megaterium MeR-2. Specifically, the invention provides a method for leaching rare earth elements in waste by using microorganisms and metabolites thereof, and solves the problems of large dosage of chemical reagents, high production cost, serious environmental pollution and the like in the chemical leaching process of rare earth waste. The strain provided by the invention is low in culture cost, high in growth speed and simple in leaching condition, has the capability of leaching rare earth ions in various wastes, and has a relatively good application prospect in the aspects of rare earth waste microorganism recovery and reutilization and the like.

The invention provides a method for breeding spores of cibotium barometz and rejuvenating young spores. The method for artificially cultivating the Cibotium barometz, provided by the invention, comprises the following steps: separately planting sporophyte seedlings of the Cibotium barometz to be rejuvenated into a matrix, and carrying out rejuvenation culture; wherein the substrate is a mixture formed by mixing leaf mold and peat soil according to the volume ratio of (1-1.5): 1 or 1: 1, or a mixture formed by mixing leaf mold, white vermiculite and garden soil according to the volume ratio of 4: 1: 3. The method is low in cost, simple in technology, high in yield, high in seedling growth speed, suitable for large-scale batch production, capable of effectively meeting the rapid breeding requirement of the golden dog and capable of being widely applied to the fields of landscaping, medicinal production, scientific research and the like.

The invention relates to the technical field of fertilizers, and discloses a fulvic acid fertilizer based on straw microbial fermentation and a preparation method and application thereof.The preparation method comprises the steps that straw is crushed and subjected to low-temperature plasma pretreatment, and pretreated straw is obtained; then, culturing the mixed microbial preparation to prepare a culture solution; then, the pretreated straw, a nutrient solution, a fermentation auxiliary agent and trichoderma are mixed for fermentation, and therefore a fermentation product is generated. The fermentation auxiliary agent is prepared from seaweed meal, bean flour, humus soil and molasses. And finally, carrying out solid-liquid separation on the fermentation product, and drying the separated solid part to finally obtain the fulvic acid fertilizer. Through combination of low-temperature plasma pretreatment and an innovative fermentation auxiliary agent, the preparation process of the fulvic acid fertilizer is optimized, the fertilizer efficiency of the fertilizer and the crop growth effect are improved, and meanwhile, the environment problem of agricultural waste is solved.

The invention belongs to the technical field of biology, and particularly relates to kluyveromyces marxianus with high beta-glucan content and application of the kluyveromyces marxianus. Specifically, the invention provides a Kluyveromyces marxianus, the classification name of the Kluyveromyces marxianus is Kluyveromyces marxianus CJA0020, and the preservation number of the Kluyveromyces marxianus is CCTCC (China Center For Type Culture Collection) No.M 20241673. According to the Kluyveromyces marxianus screened by the invention, the strain growth speed is high, a strain fermentation product has higher biomass and beta-glucan content, and the beta-glucan content can reach 1.23 + / -0.06 g / L; the biomass can reach 400 g / Kg (wet weight) and the protein content can reach 45% when the strain is cultured for 32 hours during fed-batch fermentation, and the strain can also be used for producing yeast single-cell protein.

The invention relates to the technical field of environment-friendly biological rare earth recovery, in particular to burkholderia cepacia and a method for leaching rare earth elements in waste by using the burkholderia cepacia. Specifically, the invention provides a method for leaching rare earth elements in waste by using microorganisms and metabolites thereof, and solves the problems of large dosage of chemical reagents, high production cost, serious environmental pollution and the like in the chemical leaching process of rare earth waste. The strain provided by the invention is low in culture cost, high in growth speed and simple in leaching condition, has the capability of leaching rare earth ions in various wastes, and has a relatively good application prospect in the aspects of rare earth waste microorganism recovery and reutilization and the like.

The invention provides a Trichoderma asperellum TAZ19, a biocontrol inoculant and application of the Trichoderma asperellum TAZ19, the Trichoderma asperellum TAZ19 is preserved in the China Center for Type Culture Collection on October 25, 2024, and the preservation number of the Trichoderma asperellum TAZ19 is CCTCC M 20242341. The active ingredients of the biocontrol inoculant comprise the trichoderma asperellum TAZ19 strain, and the trichoderma asperellum TAZ19 strain is one or more of conidia, hypha, fermentation filtrate or active extracts of the trichoderma asperellum TAZ19 strain of the trichoderma asperellum TAZ19 strain. The trichoderma asperellum TAZ19 has an excellent antagonistic effect on a plurality of plant disease pathogenic bacteria such as dispora pinnatifida, a plurality of fusarium oxysporum, apple black beancurd skin fungi and botryosphaeria dothidea, has broad-spectrum antibacterial activity, is high in growth speed, high in antibacterial activity and high in hyperparasitism ability, has better saline-alkaline tolerance, also has a growth promoting effect on plants, and can be widely applied to the field of plant diseases. The strain can be used as an active component of a biocontrol inoculant to be widely applied to prevention and treatment of various plant diseases such as pine tree branch rot, wheat stem rot and tomato fusarium wilt, and has a wide application prospect.

The invention provides a high-salinity high-tidal-flat mangrove forest ecological restoration method. The high-salinity high-tidal-flat mangrove forest ecological restoration method comprises the following steps of S1, soil improvement, S2, seedling cultivation, S3, seedling planting, S4, seedling reseeding, S5, bank protection device arrangement and S6, pest control. The soil conditioner is used for improving the soil structure and reducing the soil salinity. Salt-resistant domestication is performed on the seedlings by gradually improving the salinity of irrigation water, so that the salt resistance of the seedlings is improved. Organic fertilizer, ferriporphyrin, abscisic acid and brassinolide are used for providing nutrients for seedlings, osmotic equilibrium in plants is adjusted, opening and closing of air holes are adjusted, plasticity of cell walls is adjusted, and therefore the salt resistance of the plants is enhanced. According to the method, the roots of seedlings are inoculated with the halorhodobryum terbach and the proteobacteria, the halorhodobryum terbach and the proteobacteria terbach form a symbiotic relationship with the roots of plants, a microbial community is formed, and the absorption efficiency of the plants to nutrients in soil is According to the method, the planting survival rate and the plant growth rate are improved through the multi-way overall synergistic effect, and then the biological diversity is improved.

The invention provides a two-dimensional porphyrin-based MOF (Metal Organic Framework) layered nano-channel membrane, a preparation method and application, the layered nano-channel membrane comprises two-dimensional porphyrin-based MOF nanosheets, the two-dimensional porphyrin-based MOF nanosheets are stacked layer by layer, and the two-dimensional porphyrin-based MOF nanosheets are modified with a chelating agent with cation recognition capability. Compared with a traditional two-dimensional membrane and an existing publically reported MOF separation membrane, the two-dimensional porphyrin-based MOF layered nanochannel membrane has an interlayer confinement transmission channel and a pore structure at the same time, and effective separation of ions can be achieved based on the synergistic effect of the interlayer confinement transmission channel and the pore structure; the chelating agent can be subjected to a complexation reaction with specific cations, so that the selectivity of ions with different valence states is improved, and the ion separation efficiency is improved. Besides, based on photo-thermal response of porphyrin, a temperature field is formed in the nano-channel after irradiation of a light source, so that driving force can be provided for ion transmission, and the ion separation efficiency is effectively improved.

The invention discloses a preparation method of a graphene composite lithium iron phosphate positive electrode material, and relates to the technical field of positive electrode materials, and the preparation method comprises the following steps: S1, adding a graphene oxide into deionized water, and stirring to obtain a solution I; s2, dissolving ferric salt in deionized water according to the mass ratio of the ferric salt to graphene oxide of 1: 0.05, adding the solution I, and stirring to obtain a solution II; s3, sequentially adding phosphoric acid, ethylene glycol and lithium salt into the solution II according to the molar ratio of ferric salt to phosphoric acid to lithium salt of 1: 1: 3, and stirring to obtain a solution III; s4, putting the solution III into a reactor, covering and sealing, heating in a gradient water bath, soaking a product obtained in the water bath with deionized water, and drying in a vacuum freeze dryer; s5, vacuum drying; the crystallinity and morphology of the product are optimized by accurately controlling the water bath temperature and time; and a uniform and ordered crystal structure is formed by staged water bath, so that the electrochemical performance of the product is improved.

The invention discloses a method for in-situ growth of a large-thickness high temperature resistance / heat insulation / radiation heat dissipation integrated thermal protection coating with a multistage gradient hole structure on the surface of thin-wall metal, and relates to the technical field of thermal protection coatings. The invention aims to solve the problems of how to finely regulate and control the pore size, pore content and pore distribution in the coating and how to improve the heat insulation performance and radiation heat dissipation performance of the coating. According to the method, electric parameters are regulated and controlled on the thin-wall metal surface in an electrolyte system in a multi-step grading mode, and in-situ preparation of the large-thickness high-temperature-resistant / heat-insulation / radiation heat dissipation integrated thermal protection coating with the multi-stage gradient hole structure is achieved. According to the invention, the multi-stage gradient pore structure coating is innovatively constructed by adopting multi-step hierarchical electrical parameters, so that the internal pore characteristics of the coating can be effectively controlled, the integrated improvement of heat insulation, radiation heat dissipation and high temperature resistance can be realized, and a new way is opened up for the in-situ preparation of a large-thickness and high-performance thermal protection coating.

The invention discloses a method for cultivating coprinus comatus by using white spirit vinasse, and belongs to the technical field of edible mushroom production. In order to realize production of coprinus comatus by using vinasse instead of cottonseed hulls, the invention provides a method for cultivating coprinus comatus by using liquor vinasse, which comprises the following steps: uniformly mixing oyster mushroom bran, vinasse with the pH value of 9-10 and bran, and adjusting the moisture to 55-65% to obtain a cultivation material; after sterilization, coprinus comatus strains are inoculated, and the coprinus comatus strains are cultured under the conditions that the temperature is 25-31 DEG C, the relative air humidity is 65-75% and no light exists until hyphae grow fully; then adding a soil covering material, and culturing for 8-10 days; and irradiating with scattered light at the temperature of 16-22 DEG C and the relative air humidity of 85-90%, culturing for 7-13 days, and picking. By optimizing the cultivation material formula and the mycelium culture temperature, the growth cycle of the coprinus comatus is shortened, the fruiting rate of the coprinus comatus is increased, the mushroom quality is improved, the production cost is reduced, and a new way is provided for edible mushroom production.

The invention relates to a Prussella sp. And application thereof, and belongs to the technical field of microorganisms. The method comprises the following steps: firstly, screening and separating a strain of Plesteria sp. RL-1 from intestinal tracts of worker termites of saw termites, and preserving the Plesteria sp. RL-1 in China General Microbiological Culture Collection Center (CGMCC) with the preservation number of CGMCC No.32481; the Prussella reevesii RL-1 can grow on an inorganic salt culture medium with alkali lignin as a unique carbon source, and has the capacity of degrading alkali lignin and decolorizing dye; experiments prove that the Princisteria RL-1 can rapidly and efficiently degrade alkali lignin, the degradation rate reaches up to 88% or above, the Princisteria RL-1 can adapt to wide temperature and pH ranges and can directly degrade crop straw such as rice straw, obtained metabolites can promote plant growth, and the Princisteria RL-1 can be applied to resource application of agricultural waste and has a wide application prospect. And wastewater treatment in industries such as papermaking and printing and dyeing.

The invention discloses a method for efficiently promoting slash pine somatic embryo maturation, and relates to the technical field of plant breeding. According to the method, the slash pine embryogenic callus is inoculated into a somatic embryo maturation culture medium containing sulfonatin and / or activated carbon, or PEG8000 and / or chitosan oligosaccharide for somatic embryo induction culture, so that early maturation of slash pine somatic embryos can be remarkably promoted. Results of the invention show that when the concentration of the sulfokine added in the culture medium is 0.5 mg / L, the total number of mature somatic embryos is as high as 109 / dish; when 0.5 mg / L of sulfonatin and 1 mg / L of activated carbon are added at the same time, the number of mature somatic embryos is up to 288 / dish; when 120g / L of PEG 8000 and 6mg / L of chitosan oligosaccharide are added at the same time, the number of mature somatic embryos is up to 123 / dish. In conclusion, the method disclosed by the invention can efficiently promote slash pine somatic embryo maturation, and is high in somatic embryo induction efficiency and strong in practicability.

The invention belongs to the technical field of biological prevention and control of plant pests, and relates to application of streptomyces sdu1201 and / or secondary metabolites in prevention and control of plant pests. Research finds that the streptomyces sp. Sdu1201 and the secondary metabolite thereof have the effect of preventing and treating tetranychus urticae and root-knot nematode.

The invention discloses a method for restoring an alpine meadow engineering slope, and relates to the technical field of ecology. The method comprises the following steps: covering surface soil on a side slope of the alpine meadow to be repaired to form a slope surface; placing potentilla anserine seeds on the slope surface; shading and watering. An indigenous species potentilla anserine is used as a grass seed for ecological restoration of the alpine meadow side slope, and the potentilla anserine can adapt to a severe environment with low temperature and barren soil, is high in growth speed and can quickly improve the vegetation coverage of the slope surface; the potentilla anserine can maintain the diversity of local alpine meadow biocenosis and prevent alien species from invading; sunshade not only can prevent sunlight from directly irradiating the soil, reduce the soil temperature of the surface soil of the side slope of the alpine meadow and maintain the soil moisture, but also can reduce the loss of the surface soil and the potentilla anserine seeds in the'vacuum period 'of vegetation protection. By means of the method, the slope vegetation in the alpine meadow area can be rapidly restored, and the obvious effect on ecological restoration of the slope in the alpine meadow area is achieved.

The invention discloses a novel SNP (Single Nucleotide Polymorphism) molecular marker related to a pig daily gain character and an application of the SNP molecular marker in breeding. The SNP molecular marker is Agt located at the 15401211bp position of the No.17 chromosome of a pig genome Ensembl Sscrofa11.1 version; g mutation. Through the application of the SNP molecular marker, the daily weight gain performance of large Duroc commercial pigs and Duroc boars thereof can be improved, so that the growth speed is increased, the on-the-market time is shortened, and the economic benefits are improved; and through the SNP molecular marker and the application thereof, the breeding period can be greatly shortened, the breeding cost is saved, and the market competitiveness is improved.

The invention belongs to the technical field of microorganisms, and relates to an aroma-producing yeast XW2-1 and application thereof. The aroma-producing yeast XW2-1 disclosed by the invention is clavipora lusitaniae and is preserved in the general microbiological center of the China Committee for Culture Collection of Microorganisms on June 14, 2024, and the preservation number of the aroma-producing yeast XW2-1 is CGMCC (China General Microbiological Culture Collection Center) No. 30947. The aroma-producing yeast XW2-1 disclosed by the invention is high in growth speed, relatively strong in tolerance and outstanding in aroma-producing effect, and can be used for tobacco aroma enhancement. The strain can ferment tobacco powder in a liquid state, the variety and content of aroma components in fermentation liquor are remarkably increased, and the total amount of the aroma components is increased by two times or above. The tobacco flavor produced by fermentation of the strain has typical aroma characteristics, the aroma enhancement effect is remarkable, the smokeability is high, and the smoking quality of tobacco products can be improved.

The invention provides a preparation method of vitamin C, and belongs to the technical field of vitamin C. The preparation method comprises the following steps: preparing 2-keto-L-gulonic acid, preparing a catalyst and reacting. The preparation method of the catalyst comprises the following steps: carrying out water vapor treatment on a ZMS-5 molecular sieve, then putting the ZMS-5 molecular sieve into a calcining furnace, calcining at 500-520 DEG C for 3.5-5.0 h, naturally recovering to room temperature, putting the ZMS-5 molecular sieve into deionized water, adding gamma-polyglutamic acid and citric acid, uniformly stirring, filtering and drying to obtain a pretreated molecular sieve; the pretreated molecular sieve is put into a phosphoric acid solution to be soaked, drying is conducted after soaking is completed, and a catalyst is prepared; the vitamin C prepared by the preparation method disclosed by the invention is relatively high in purity and yield, and the 2-keto-L-gulonic acid prepared by fermentation is high in content and short in fermentation period.

The invention provides an edible fungus culture medium and a preparation method, and relates to the technical field of edible fungus cultivation, and the edible fungus culture medium comprises the following components by mass: 10-20 parts of a seaweed polysaccharide matrix, 5-15 parts of insect protein powder, 15-25 parts of biological carbon fiber, 10-20 parts of corncob powder, 0.5-2 parts of a natural silicon source, a proper amount of a trace element solution, and a proper amount of water. The algal polysaccharide matrix is obtained by extracting algal polysaccharides, including algin or alginic acid, from algae in hot water, the insect protein powder is prepared by drying, crushing and carrying out enzymolysis on yellow mealworms or fly maggots, the biochar fibers are prepared by pyrolyzing bamboo or crop straws, and the natural silicon source is diatomite, bentonite or perlite; the particle size of the natural silicon source is micron-sized, and the trace element solution contains zinc, iron, copper and manganese elements. The culture medium has the beneficial effects that the problems of unbalanced nutrition, poor physical performance, weak disease resistance and the like of the culture medium in the prior art are effectively solved.

The invention belongs to the technical field of microorganisms, and particularly relates to a preparation method and application of probiotic fermented apple juice. The probiotic is Kluyveromyces marxianus CICC 32017, and the Kluyveromyces marxianus can overcome the defects that the fruit and vegetable juice is insufficient in fragrance and heavy in raw and green taste when being singly fermented by lactic acid bacteria. The method for preparing the fermented apple juice comprises the following steps: juicing apples; performing enzymolysis; performing sterilization; the method comprises the following steps of: inoculating the apple juice with a Kluyveromyces marxianus CICC 32017 or a mixed microbial agent of the Kluyveromyces marxianus CICC 32017 and lactobacillus plantarum CICC 21801, and culturing for 48-72 hours in a constant-temperature incubator at the temperature of 30 DEG C, so that a large amount of organic acid is generated after fermentation is finished, the DPPH free radical scavenging rate and the ABTS free radical scavenging rate of the fermented apple juice are higher than those of a control group, the oxidation resistance is remarkably improved, meanwhile, aroma substances are increased, and the taste of the apple juice is improved. The quality of the fermented apple juice is greatly improved.

The invention relates to an ion type rare earth ore tailing sandy land soil improvement structure and an improvement method, and belongs to the technical field of ecological restoration. The ion type rare earth ore tailing sandy land soil improvement structure sequentially comprises a humus layer, a surface soil layer and a subsoil layer. The subsoil layer comprises rare earth ore tailing sandy land soil and a slow-release modifier; the surface soil layer comprises the rare earth ore tailing sandy land soil, a slow-release modifier and a quick-acting modifier; the slow-release improver comprises agricultural and forestry wastes, and the quick-acting improver comprises livestock and poultry manure, lime and a compound fertilizer. According to ecological function characteristics of the soil, aiming at physical characteristics and nutrient content of the soil and specific rare earth and aluminum toxicity pollution of a mining area, the soil layer is remolded by using different dosages and different types of improvers, so that the restoration of a local damaged soil ecological system is accelerated, and the ecological function restoration of the soil in the rare earth ore tailing sand land is realized.

The invention relates to the technical field of agricultural gardening, and discloses an efficient gardening fertilizer, which comprises the following components by mass: 40-60% of a base fertilizer; 10%-30% of a carrier material; 5%-10% of an adjusting component; the ratio of nitrogen to phosphorus to potassium in the basic fertilizer is 20-10 to 10; the carrier material comprises bentonite and diatomite, and the weight ratio of the bentonite to the diatomite is (5: 5)-(7: 3); the bentonite is subjected to acid treatment, and the acid treatment condition is that the bentonite is mixed with a 1M hydrochloric acid solution. Precise slow release of main nutrients such as nitrogen, phosphorus and potassium in the fertilizer is achieved by adopting a carrier material and a multi-layer coating technology, the surfaces of fertilizer particles are coated with chitosan and kieselguhr in a double-layer mode, permeation of water and nutrients is effectively regulated and controlled, the release speed of the fertilizer nutrients is matched with the plant growth requirement, excessive loss and waste of the nutrients are reduced, and the yield of the fertilizer is increased. The fertilizer efficiency period is prolonged.

The invention provides a methylobacterium strain JC03 for producing single-cell protein and application of the methylobacterium strain JC03 in the field of aquaculture, and belongs to the technical field of microorganisms. The methylobacterium strain JC03 is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.32616. The strain is high in growth efficiency, high in thallus crude protein content, rich in amino acid spectrum, high in essential amino acid content and rich in functional components for improving the immunocompetence of aquatic animals; the single-cell protein produced by the strain can completely or partially replace fish meal protein in feeds of marine fishes such as turbot, pseudosciaena crocea, grouper and rainbow trout; vegetable protein in feed of freshwater fish such as grass carp can be completely replaced; animal and plant proteins in feeds for shrimps and crabs, such as penaeus vannamei, can be completely replaced, and animal and plant proteins in stichopus japonicus feeds can be completely replaced; the immunocompetence of fed aquatic animals can be obviously improved. The invention provides a microbial strain for efficiently converting methanol to produce single-cell protein, and the microbial strain has a wide application prospect in the field of aquaculture.

The invention discloses a cadmium-containing wastewater treatment method and system, and the treatment method comprises the following steps: S1, culturing selenastrum capricornutum and microcystis aeruginosa, carrying out cell digestion, centrifuging, and dispersing to obtain mixed algae cells; s2, co-incubating the mixed algae cells and a sodium selenite solution to obtain incubated mixed algae cells; and S3, adding the incubated mixed algae cells into the cadmium-containing wastewater for treatment. Through the combined action of the selenastrum capricornutum and the microcystis aeruginosa, a large amount of cadmium ions in the cadmium-containing wastewater can be absorbed, the purpose of wastewater purification is achieved, and the method has the advantages of being low in energy consumption, high in efficiency, free of secondary pollution, low in treatment cost, green, clean, sustainable in development and the like.

The invention relates to an opsin-based industrialized culture illumination method for steelhead trout in different growth stages, which is based on physiological characteristics of steelhead trout in different growth stages, adopts an illumination scheme with a specific wavelength, and optimizes growth and health management in a culture process. In the stage that the weight of the steelhead trout is less than 3g, using ultraviolet light with the wavelength of 360-370 nm to irradiate the steelhead trout; when the weight of the hardhead trout ranges from 3 g to 8 g, ultraviolet light and blue light with the wavelength ranging from 430 nm to 445 nm are adopted for jointly irradiating, the ultraviolet light irradiation amount is gradually reduced according to the increase of the weight of the hardhead trout, and the blue light irradiation amount is increased; when the weight of the hardhead trout is larger than 8 g and smaller than 38 g, blue light is used for irradiation; when the weight of the hardhead trout is greater than 38 g, the hardhead trout is irradiated by using red light with the wavelength of 560-580 nm. By accurately controlling the light wavelength and the illumination duration, the growth rate and the immunity of the Oncorhynchus mykiss are improved, and the culture benefits are optimized.

The invention discloses a nuclear power station zirconium alloy cladding tube surface oxide film standard sample preparation method, which comprises: S1, pre-treatment: carrying out physical grinding and chemical polishing on the zirconium alloy cladding tube surface, and carrying out vacuum thermal annealing treatment to obtain a zirconium alloy cladding tube sample; s2, plasma electrolytic oxidation: placing the preheated electrolyte in a stainless steel electrolytic bath, immersing the zirconium alloy cladding tube sample in the electrolyte, taking the zirconium alloy cladding tube sample as an anode, taking the stainless steel electrolytic bath as a cathode, and carrying out plasma electrolytic oxidation on the zirconium alloy cladding tube sample by adopting a bipolar pulse power supply, an oxidation film is generated on the surface of the zirconium alloy cladding tube sample, and a zirconium alloy cladding tube oxidation film sample is obtained; and S3, post-treatment: carrying out surface cleaning on the zirconium alloy cladding tube oxidation film sample. The preparation technology is simple, operation is easy and convenient, the growth speed of the oxidation film is high, the bonding strength of the oxidation film and the zirconium alloy matrix is high, and the film layer is compact and not prone to falling off.

The invention discloses a box-type glutinous yam cultivation device with clamping grooves, and relates to the technical field of yam cultivation. By arranging the clamping groove assemblies and the fixing clamping grooves, the number of the directional growth plate units can be increased or decreased according to different varieties of Chinese yams, gaps between the directional growth plate units can be adjusted at the same time, and therefore the width of the directional growth groove can be changed, and the directional growth groove with the corresponding width is provided for planting of different varieties of waxy Chinese yams; in each directional growth plate unit, the longitudinal height of the directional growth plate can be increased through a heightening plate, the height requirement for growth of the glutinous Chinese yam is met, the height and width of the directional growth groove in the clamping groove assembly are adjusted, and the application range of the directional growth plate is widened; by arranging the root system growth expansion assembly, a space for growth of the waxy yam root system can be additionally arranged at the bottom of the cultivation box, the path for the waxy yam root system to obtain nutrients is increased, the growth speed of waxy yam can be increased, and the yield of yam planting is increased.

The invention belongs to the technical field of microorganisms and aquaculture, and discloses a high-environmental-adaptability nitrification and denitrification bacillus cereus strain, a microbial agent and application of the high-environmental-adaptability nitrification and denitrification bacillus cereus strain, the high-environmental-adaptability nitrification and denitrification bacillus cereus strain is bacillus cereus HCCN1 and is preserved in Guangdong Microbial Culture Collection Center on November 13, 2024, and the preservation number is GDMCC No: 65477. The invention also discloses a microbial agent containing the strain HCCN1 as an active component and application of the microbial agent. The strain HCCN1 has high stress resistance and high environmental adaptability, has heterotrophic nitrification and aerobic denitrification functions at the same time, can efficiently degrade nitrogen and phosphorus under the severe environmental conditions of wide pH value range, temperature range, high salt and alkali concentration and the like, performs purification treatment on aquaculture water, and is high in biological safety and low in cost. The industrial requirements of efficient, healthy and sustainable aquaculture can be met.