209results about How to "Stable growth" patented technology

The invention relates to the technical field of lithium iron phosphate production, and discloses a carbon-coated titanium-doped lithium iron phosphate positive electrode material and a preparation method thereof.The preparation method comprises the following steps that 1, a ferrous solution and a phosphorus source solution are mixed in proportion, dopamine hydrochloride is added, a pH regulator is dropwise added in the stirring state, the pH of the solution is adjusted to 4.0-5.5, a reaction is conducted, a titanium source solution is added, and a reaction solution is obtained; after uniformly stirring, continuously dropwise adding a pH regulator to regulate the pH value of the solution to 5.5-6.5; the iron phosphate octahydrate coated with the titanium-embedded polydopamine is obtained; 2) calcining the titanium-embedded polydopamine-coated ferrous phosphate octahydrate in an inert gas atmosphere to obtain carbon-coated titanium-doped anhydrous ferrous phosphate; 3) mixing the carbon-coated titanium-doped anhydrous ferrous phosphate with lithium phosphate and a carbon source, ball-milling, mixing, spray-drying and calcining to obtain a carbon-coated titanium-doped lithium iron phosphate positive electrode material; the synthesis process is simple, and energy consumption is reduced.

The invention discloses a strain of arthrosporium spp. And application thereof in prevention and treatment of pine wood line disease. The invention relates to Arthrobotrys heuanensis 18GD1705A, which is preserved in China General Microbiological Culture Collection Center (CGMCC) on November 15, 2021, the address of the Arthrobotrys heuanensis is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing, the postal code is 100101, and the preservation number is CGMCC No.23851. The Arthrobotrys heuanensis 18GD1705A has the advantages that the Arthrobotrys heuanensis 18GD1705A can be used for preparing a microbial inoculant; according to the method disclosed by the invention, the river-source arthrosporium is inoculated into pine seedling bodies, and the nematodes are caught by utilizing a three-dimensional viscous bacterium net formed by special hypha metamorphosis and can also be killed by forming a structure similar to a contraction ring through singular contraction. Meanwhile, before the pine wood nematodes colonize the pine trees, the river source arthrosporium inoculant is inoculated into the pine trees, so that the tree vigor of the pine seedlings can be effectively enhanced, and a better prevention effect is achieved.

The invention discloses a water area pollutant emergency treatment system and equipment in the technical field of water pollution treatment, and the system comprises a plurality of water quality monitoring modules which are used for collecting water quality factors of a covered area and generating real-time water quality data; the data collection module is used for acquiring, storing and forwarding real-time water quality data; the prediction module is used for analyzing and predicting the pollutant component evolution condition based on the real-time water quality data by using a big data model, and generating a pollutant component evolution condition graph of the water area; the emergency preprocessing scheme generation module is used for generating a corresponding preprocessing scheme and a preprocessing position based on the pollutant diffusion range diagram and the pollutant component evolution situation diagram; the biological filtration assemblies are used for being deployed at the pretreatment position and filtering and cleaning the water area. Plants aiming at specific pollutants are planted on the biological filtration assembly, and long-term ecological restoration can be achieved while water area pollutants are emergently treated.

The invention relates to the technical field of carbon dioxide monitoring, in particular to a cell incubator carbon dioxide concentration monitoring system which comprises an incubator shell, a transparent packaging plate is installed on one side of the incubator shell, a connecting base plate is fixedly installed on the other side of the incubator shell, and a square communicating frame is fixedly connected to the connecting base plate in an inserted mode. Placing plates are uniformly mounted on the inner wall of the incubator shell, transverse mounting grooves are formed in the inner wall of the top end of the incubator shell and the bottoms of the placing plates, self-resetting sealing assemblies are mounted in the transverse mounting grooves, and one ends of the self-resetting sealing assemblies are inserted into the square communicating frames; the carbon dioxide concentration change in the cell culture process can be comprehensively and accurately mastered, the use flexibility can be improved, the error risk caused by a single-type measuring instrument is reduced, meanwhile, the incubator shell can be effectively closed, and the cell culture efficiency is improved. It is ensured that the cell culture stably grows in the environment without being interfered by the external environment in the monitoring process.

The invention relates to streptococcus zooepidemicus for producing hyaluronic acid and application of the streptococcus zooepidemicus, and belongs to the technical field of bioengineering. The streptococcus zooepidemicus KFA018 resistant to high-content lactic acid and high in hyaluronic acid yield is obtained through ARTP mutagenesis and high-lactic acid tolerance domestication, and the problems that existing streptococcus zooepidemicus is low in hyaluronic acid yield, low in lactic acid tolerance and the like are effectively solved. The hyaluronic acid yield of the streptococcus zooepidemicus KFA018 disclosed by the invention is as high as 17-18g / L. Meanwhile, the lactic acid content of the streptococcus zooepidemicus KFA018 can reach 45 g / L, the streptococcus zooepidemicus KFA018 has the characteristic of high lactic acid resistance, and a very excellent strain selection is provided for production of hyaluronic acid.

The invention discloses double-layer cross-linked artificial matrigel and an application method of the double-layer cross-linked artificial matrigel in a small intestine micro-physiological system. Low-concentration calcium ions are adopted for primary crosslinking to form a soft inner layer structure, and then high-concentration calcium ions are used for secondary crosslinking to improve the overall rigidity. The matrigel is used for dynamic culture of small intestine organoid and is combined with a micro-fluidic chip to form a small intestine micro-physiological system. In the system, the digestive absorption process of the small intestine is dynamically simulated by controlling the flow ratio and rate of digestive fluid and culture fluid. Compared with the traditional natural matrigel, the matrigel disclosed by the invention has more appropriate mechanical strength and structural stability, supports long-term growth of the organoids, and improves the multiplication capacity, tight connection and structural integrity of the organoids in an in-vitro environment. The method can be used for researching intestinal diseases, food digestion and drug absorption, and is an in-vitro digestion simulation platform with high biocompatibility and stability.

The invention relates to the technical field of fertilizer preparation, in particular to traditional Chinese medicine residue and mushroom dreg compound fermented fertilizer as well as a preparation method and application thereof. The preparation method of the traditional Chinese medicine residue and fungus residue compound fermented fertilizer comprises the following steps: (1) crushing pleurotus eryngii fungus residues, perilla leaf traditional Chinese medicine residues and cow dung, and mixing to obtain a material 1; and (2) adjusting the carbon nitrogen ratio and the water content of the material 1, and then fermenting. The fermented fertilizer provided by the invention can significantly influence the growth of potted tobacco, soil characteristics and microbial communities, and provides a theoretical basis and practical guidance for optimizing tobacco cultivation and fungus residue utilization.

The invention discloses a method for judging the source material allowance of an MBE source furnace based on the surface of an epitaxial wafer, and the method comprises the steps: selecting proper points on the surface of the epitaxial wafer, measuring the cycle, the half-peak width and the mismatch value of the surface of the epitaxial wafer through XRD, and respectively calculating the cycle, the half-peak width and the mismatch value of the epitaxial wafer through standard deviation; whether the source materials of the source furnace are insufficient or not is judged by designing a control group, an experience control group and an evidence group and comparing standard deviation ratios of the groups, and the allowance of the source materials of the molecular beam epitaxy source furnace is judged more rigorously. The method allows the sufficiency of the source material of the molecular beam epitaxy source furnace to be monitored in real time, and stable epitaxial wafer growth is ensured through XRD and data analysis. Compared with a traditional statistical method, the method is more accurate and scientific, resource waste is avoided, and the quality of the epitaxial material is improved.

The invention belongs to the technical field of environmental microorganisms, and relates to a bacterial strain for reducing N2O emission of soil with a large amount of applied biogas slurry and an application method thereof, the bacterial strain is Pseudomonas sp.K33, and is preserved in China Center for Type Culture Collection, the preservation address is number 299 of eight road, Wuchang District, Wuhan City, Hubei Province, the preservation number is CCTCC M 20242032, the preservation date is September 23, 2024, and the 16S rRNA gene sequence of the bacterial strain is shown as SEQ ID NO.1. According to the invention, the biogas residue is used as a matrix to enrich and separate the efficient N2O reducing strain Pseudomonas sp.K33 in the biogas residue, and the strain is applied to farmland soil to effectively promote the conversion of NO3-NO2-N2O-N2, shorten the conversion period of excess NO3 <-> and NO2 <-> in the soil, reduce the emission of N2O in the farmland soil after a large amount of biogas slurry is applied for a long time, and reduce the emission of greenhouse gases.

The invention belongs to the field of preparation of hexagonal boron nitride materials, and discloses a preparation method of a multilayer hexagonal boron nitride single crystal film, which comprises the following steps: (1) preparing an asymmetric substrate, introducing a solid film of a boron source material on the substrate, and carrying out low-pressure nitridation reaction and subsequent high-temperature annealing to obtain a boron nitride single crystal film; therefore, a plurality of discrete and directionally distributed hexagonal boron nitride single-crystal crystal domain films are formed on the substrate; and (2) carrying out MOCVD epitaxial growth on the substrate on which the plurality of discrete and directionally distributed hexagonal boron nitride single-crystal domain films are formed, so as to continuously grow by taking the hexagonal boron nitride single-crystal domain films as nucleation points to obtain a continuous and multilayer hexagonal boron nitride single-crystal film. The whole process of the preparation method is improved, a two-step method is utilized, and the growth of the hexagonal boron nitride single crystal multilayer film is completed by adopting two boron sources.

The invention relates to the technical field of stem cell induced differentiation, and discloses an umbilical cord mesenchymal stem cell adipogenic induced differentiation culture medium and a culture method. The culture medium comprises the following substances: a DMEM (Dulbecco's Modified Eagle Medium) / F12 basal culture medium, fetal calf serum, insulin, penicillin, streptomycin, dexamethasone, 3-isobutyl-1-methylxanthine, indometacin, BMP-2 and FGF-1 (Fibroblast Growth Factor 1). The culture method comprises the following steps: (1) carrying out primary isolation culture on umbilical cord mesenchymal stem cells; (2) carrying out passage on the umbilical cord mesenchymal stem cells; and (3) inducing adipogenesis of the umbilical cord mesenchymal stem cells by using the adipogenesis induced differentiation culture medium. BMP-2 and FGF-1 are added on the basis of a traditional adipogenic induction culture medium to induce and promote the umbilical cord mesenchymal stem cells to be more efficiently differentiated into adipocytes under the combined action, so that the adipogenic differentiation time is shortened, and the adipogenic differentiation efficiency is improved; the umbilical cord mesenchymal stem cell adipogenic culture medium is stable in formula, simple and convenient in culture method and suitable for wide popularization.

The utility model discloses a crop planting test incubator, and belongs to the technical field of incubators. A crop planting test cultivation box comprises a box body. A telescopic mechanism is installed on the bottom face of the bearing frame, a telescopic rod is slidably connected to the bottom face of the telescopic mechanism, a supporting column is fixedly connected to the end of the bearing frame, a rolling column is rotatably connected to the bottom face of the supporting column, the supporting column is matched with the lower portion of the box body in an inserted mode, and the telescopic rod is slidably connected with the bottom face of the box body. Through the design of the stabilizing frame in the cultivation barrel, the root of the seedling can be conveniently fixed, and through the design of the supporting piece, after the seedling grows up, the supporting frame can be inserted outside the seedling, the supporting frame can be rotated to drive the rotating rod to rotate, and the supporting frame stops when the rotating rod is subjected to external force; at the moment, a spring can drive a friction block to abut against the outer wall of the bearing frame for friction, then a limiting supporting frame can be fixed, the seedlings can be supported through the design, and stable growth of the seedlings is guaranteed.

The invention relates to the technical field of precious metal filament manufacturing, in particular to a temperature control system for growing precious metal filaments through a micro down-draw method, which comprises a crucible and a quartz tube, an induction coil is wound outside the quartz tube, a first temperature thermocouple is arranged in the crucible, and a second temperature thermocouple is arranged at the bottom of the inner side of the crucible. A magnetizer is arranged on the outer side of the induction coil, a cooling assembly is fixedly connected to the bottom of the second flange plate, a crystallizer is arranged in the center of the bottom of the crucible, and a seed crystal guide rod is arranged in the crucible; and the control module is used for adjusting initial parameters required by precious metal wire manufacturing, adjusting the output power of the induction coil and controlling the running speed of the collecting assembly. According to the invention, controllable solidification of fluid can be realized, the position of a solidification interface is stabilized, precious metal wires can directly grow from the melt, the structure-performance is accurately controlled, and finally, short-process and low-cost manufacturing is realized.

The invention relates to the field of chemical application, and discloses a device for preparing large-particle ammonium sulfate crystals through reduced-speed crystallization. Comprising a neutralization reactor, a settling separation tank, a pre-crystallization solution tank, a first-stage intermittent jacket crystallizer, a second-stage intermittent jacket crystallizer, a filter powder sieving device, an ammoximation tert-butyl alcohol tower reboiler, a heat exchanger group, a stirrer group and a centrifugal pump group, wherein the centrifugal pump group consists of a centrifugal pump I, a centrifugal pump II, a centrifugal pump III, a centrifugal pump IV and a centrifugal pump V; the invention further discloses a process for preparing the large-particle ammonium sulfate crystals through speed-reducing crystallization. The process comprises the following steps: adding rearrangement liquid from a caprolactam rearrangement system and gas ammonia into the neutralization reactor through an external circulation pipeline. By fully utilizing heat in a neutralization reaction and crystallization process and combining with a compound additive, a seed crystal and a speed reduction crystallization technology, an efficient two-stage series crystallization mode is realized, the generation of large-particle ammonium sulfate crystals is promoted, the crystal quality is optimized, the energy consumption is reduced and the production efficiency is improved.

The present invention provides a braided hernia patch for preventing adhesion and promoting repair and a preparation method thereof. First, polytetrafluoroethylene filaments are uniformly wrapped on the surface of high-strength core yarns to obtain core-shell composite yarns, and then the core-shell composite yarns and high-strength yarns are woven into a double-sided structural fabric in a weaving manner to obtain a mesh fabric with high-strength yarns on one side and core-shell composite yarns on the other side; finally, the mesh fabric is subjected to low-temperature pressure plastic film forming treatment to obtain a braided hernia patch. The present invention adopts core-shell composite yarns in combination with weaving molding and low-temperature pressure plastic film forming processes to obtain a braided hernia patch with a sparse high-strength mesh structure on one side and a dense polytetrafluoroethylene mesh film structure on the other side, realizing the integration of anti-adhesion and support functions; the braided hernia patch solves the problems of mismatch between the mechanical and biomedical properties of existing hernia patches and poor application performance, and has the softness, bending tolerance and foldability required for the patch, and has broad market application prospects.

The invention discloses a turf cultivation fixing device for prevention and control of water and soil loss, comprising: a splicable frame fixed on the ground; a plurality of groups of fixing ropes are arranged on the splicing frame at equal intervals; the tensioning mechanism is detachably connected to one end of the fixing rope, and the tensioning mechanism abuts against one side of the splicing frame; the quick release mechanism is mounted at the other end of the fixing rope, a plurality of mounting holes are formed in the splicing frame in a whole row, and the quick release mechanism penetrates through the mounting holes and abuts against the other side of the splicing frame; wherein the splicing frames are of #-shaped structures, connecting assemblies are installed at the ends of the splicing frames, and the adjacent splicing frames are detachably connected through the connecting assemblies. The turf can be fixed, it is guaranteed that the turf can be fixed to a laying zone in the early laying stage, the turf can be recycled after being used, and the influence on the environment is reduced.

The invention discloses a liquid fertilizer formula prepared by compounding a tylosin finished product liquid and other components, and relates to the technical field of fertilizer preparation, and the liquid fertilizer formula comprises the steps of special pretreatment of tylosin, auxiliary compounding, nutrient substance addition and quality detection post-treatment. Certain carbon-carbon bonds, carbon-hydrogen bonds and other chemical bonds in tylosin molecules and byproducts thereof can be broken and recombined under bombardment of active particles, more functional groups with high activity are generated, the biological activity of the finished tylosin liquid can be enhanced, the finished tylosin liquid can be more easily compounded with other components in the subsequent process, and the stability of the finished tylosin liquid is improved. A stable compound with better synergy is formed by means of chemical bonding, hydrogen bonding and the like, ultrasonic waves are uniformly spread in a supercritical carbon dioxide medium, generated high-frequency vibration, cavitation effect and the like act on all the components, and the agglomeration phenomenon possibly existing among the components is further broken.

The invention relates to the technical field of soil irrigation, and discloses a water-fertilizer-pesticide all-in-one machine for soil improvement, which comprises a trailer body, the trailer body is provided with three fertilizer preparation main tanks and three fertilizer preparation auxiliary tanks for preparing acid, alkali and a soil conditioner, and the bottom of the trailer body is fixedly connected with a mounting main frame. A marking main irrigation assembly and an acid-alkali soil detection piece are arranged on the mounting main frame, and the acid-alkali soil detection piece comprises a rotary transposition frame, a pH value meter and a pressure detection rod; the method comprises the following steps of: injecting into an alkaline preparation tank, automatically mixing with fertilizer liquid, pushing out an accurate buried plunger from a mark discharge cylinder box to be positioned in the ground, inserting a marking piece into the accurate buried plunger in the later period, distinguishing areas injected with different doses of soil amendment, and supplementing proper irrigation fertilizer for soil, so that the corresponding doses can be adjusted according to the content in the areas; irrigation is reasonably planned according to the state in the area, stable growth of crops is guaranteed, and the product yield and quality are improved.

The invention discloses a crucible and a temperature field structure for growing crystals by a Czochralski method, the crucible is a cylinder with an open upper end and a closed lower end, the crucible sequentially comprises a crystal growth area, a transition area and a heat preservation area from top to bottom, the transition area and the heat preservation area are used for accommodating a melt, and the transition area and the heat preservation area are communicated with the crystal growth area. The transition area and the heat preservation area are buried in a zirconium sand layer of the temperature field structure during crystal growth, the crystal growth area is used for crystal growth, the heat preservation area and the crystal growth area are both equal-diameter cylinders, the diameter of the heat preservation area is smaller than that of the crystal growth area, the transition area is connected between the heat preservation area and the crystal growth area, and the transition area is connected with the heat preservation area. The transition area is a conical barrel with the upper end large in diameter and the lower end small in diameter. According to the invention, the problem that the spontaneous crystallization phenomenon of a melt easily occurs at the bottom of a large-size crucible for growing large-size crystals in the prior art is solved, and stable growth of the large-size crystals is ensured.

The invention provides a method and a device for controlling stable growth of a semiconductor material, electronic equipment and a medium, and the method comprises the following steps: (1) adjusting the temperature of a source furnace used in a material growth process by combining an X-ray diffraction result of a forehearth material, a photoluminescence test result and a beam current change value of the source furnace; (2) respectively adjusting the deoxidation temperature of the substrate and the growth temperature of the epitaxial layer in combination with temperature points at which a specific structure appears and disappears in the reflection high-energy electron diffraction image; (3) adjusting the valve position difference of the V-group beam by combining the V-group beam difference in the beam test and the vacuum difference of the growth chamber in the growth process; wherein the steps (1)-(3) are not divided into a sequence. According to the method provided by the invention, all key parameters in the growth process are controlled and are adjusted in combination with related parameters, so that stable growth of large-scale semiconductor materials is realized, the consistency of the materials is maintained, the technological process is simplified, the operation difficulty is reduced, and large-scale popularization and application are facilitated.

The utility model discloses an ecological wall structure of a green building, and belongs to the field of ecological walls. Comprising an ecological wall body, a containing cavity is formed in the front end of the ecological wall body, a rotating rod is rotationally arranged in the containing cavity, an inserting groove is formed in the rotating rod, an inserting plate is installed at the inserting groove in an inserting mode, a mounting frame is fixed to one side of the inserting plate, a bearing hole for bearing a flowerpot is formed in the mounting frame, and a positioning hole is formed in the center of the top of the inserting plate; a positioning cavity is formed in the middle section of the top, corresponding to the inserting groove, in the rotating rod. A positioning assembly is installed in the positioning cavity. And the positioning assembly comprises a positioning pin slidably arranged in the positioning cavity, a lead screw is installed at the center of the positioning pin in a penetrating mode, an embedded disc is fixed to the top of the lead screw, and the embedded disc is rotatably installed on the rotating rod in an embedded mode. And after the mounting frame is damaged, the mounting frame can be conveniently and rapidly replaced, and the overall replacement efficiency is guaranteed.

The invention relates to a method for preparing a fluorine-doped tin oxide transparent conductive film through ultrasonic atomization and application of the fluorine-doped tin oxide transparent conductive film, adopted fluorine-doped tin oxide transparent conductive film spraying liquid comprises the following components: a tin source, alcohol, a fluorine-containing dopant and lithium hydroxide, and the pH value of the spraying liquid is 2.0 or above. Therefore, the acidity is lower than that of the traditional film, the microdefect of the film layer can be improved, the surface roughness of the film is reduced, the gas adsorption capacity of the film layer is reduced, and the film resistor stability is improved. According to the preparation method, the combination of trifluoroacetic acid and lithium hydroxide is innovatively adopted, the acidity is reduced and controllable, the film forming thickness is controllable, the fluorine doping level is high, the problems of film growth and corrosion of coating equipment can be well solved, and conditions are provided for preparation of a high-quality FTO film.

The invention discloses a method for reducing the content of alpha-tomatine in green tomatoes and improving the flavor of the green tomatoes through probiotic fermentation, and belongs to the field of food processing. A strain which can grow in a green tomato system and can reduce alpha-tomaquine and improve the flavor of the alpha-tomaquine is obtained through screening, and a specific operation mode and fermentation treatment time are explored on the basis. By using the lactobacillus plantarum CICC 22703 to ferment the green tomatoes, alpha-tomaquine in the green tomatoes can be effectively reduced, the composition proportion of main organic acids, sweet and delicious amino acids and volatile flavor substances contained in the green tomatoes is improved, and the flavor of the green tomatoes is improved. The method is controllable in production cost, not only can effectively utilize immature green tomato resources, but also can endow the immature green tomato with unique flavor, and meets the pursuit of consumers for healthy and delicious food.

The invention provides a water-soluble fertilizer prepared based on an EPG water and fertilizer aggregation and absorption technology, and relates to the technical field of fertilizers, the water-soluble fertilizer comprises the following components by weight: 0.1-0.5 part of Ectoin, 0.05-0.2 part of polyglutamic acid with a low polymerization degree, 0.05-0.2 part of polyglutamic acid with a high polymerization degree, and 0.05-0.2 part of gamma-aminobutyric acid. In the invention, the cyclic amino acid derivative enhances the retention of water around cells and reduces the loss of water penetrating through cell walls, thereby maintaining the water balance of plants in pressure environments such as drought and the like. In addition, the composition inhibits the generation of free radicals through the anti-oxidation effect, and delays the aging process of plants. Different polymerization degrees of polyglutamic acid ensure immediate and lasting nutrient release, low-polymerization-degree polyglutamic acid quickly acts on crops to improve the initial growth speed, and high-polymerization-degree polyglutamic acid ensures continuous supply to avoid nutrient interruption.

The invention relates to the technical field of soilless culture, and particularly discloses a vegetable soilless culture seedling culture and a seedling culture method thereof, and the seedling culture method of the vegetable soilless culture seedling culture comprises the following steps: cleaning and disinfecting vegetable seeds, soaking the vegetable seeds in a soaking solution, carrying out dark treatment, planting the vegetable seeds in a soilless culture substrate, and culturing to obtain vegetable seedlings. The soilless culture substrate comprises a solid substrate and a liquid substrate, the solid substrate comprises modified rock wool, modified perlite and gravel, and the liquid substrate comprises vegetable crop rotten vegetables, a leavening agent, brown sugar, a PH regulator and a heavy metal ion chelating agent. The vegetable soilless culture substrate prepared by the invention is good in water-retaining property, has a certain prevention and treatment effect on diseases and insect pests, and can solve the problem of heavy metal pollution in seedling culture, and the seedling culture method used by the invention has the advantages that vegetable seeds are high in germination rate, strong in disease and insect pest resistance and good in growth state.

The invention discloses a culture medium for producing special bacteria for petrochemical wastewater and a preparation method of the culture medium. The culture medium comprises the following components in parts by weight: 30-85 parts of glucose, 10-40 parts of cane sugar, 8-20 parts of monopotassium phosphate, 4-10 parts of magnesium sulfate, 6-18 parts of sodium bicarbonate, 20-39 parts of peptone, 13-30 parts of urea, 11-26 parts of yeast extract and 10000-20000 parts of distilled water. Compared with a conventional culture medium, the optimal culture medium and the production process provided by the invention are relatively low in cost, have the effect of promoting the concentration and the growth speed of the special bacteria of the petrochemical wastewater, and are remarkable in effect.

The application provides a method for inducing poly-podophylli rhizoma by using clump buds, comprising the following steps: S1, cutting stem segments from a podophylli rhizoma mother plant, soaking and cleaning to obtain explants; S2, disinfecting and cleaning the explants, inoculating into a clump bud induction medium to obtain podophylli rhizoma clump buds; S3, inoculating the clump buds into doubling liquid I, washing with a liquid clump bud induction medium after culture, and then transferring into doubling liquid II; S4, taking out the clump buds, cleaning, inoculating into a clump bud induction medium, and then inoculating into a bud proliferation medium; S5, waiting until 1-2 cm, screening out potential mutant strains through phenotypes, inoculating into the bud proliferation medium for subculture, and obtaining mutant plants; and S6, rooting culture of the mutant plants, and after root systems grow, planting and raising seedlings, and then poly-podophylli rhizoma plants are obtained. In the research, suitable concentration of colchicine is used for induction treatment twice, and through stage concentration switching and intermittent recovery strategies, the poly-ploid induction efficiency and explant survival are effectively considered.

The invention provides a fruit growth regulator and bacteriostatic preservative as well as a preparation method and application thereof, and belongs to the technical field of preservation, pomace is taken as a raw material, and pomace microfibrillated cellulose, pectin and seed oil containing phenolic substances are extracted through organic acid treatment, DES reagent auxiliary mechanical treatment, ethanol water treatment and other treatments; then carrying out hydroformylation modification on nano cellulose, grafting chitosan, and compounding with pectin to obtain dialdehyde microfibrillated cellulose-chitosan-pectin composite particles with pH response performance, and taking the dialdehyde microfibrillated cellulose-chitosan-pectin composite particles as a stabilizer of a Pickering emulsion; the green growth regulator solution is used as a continuous phase, the seed oil mixed Chinese herbal medicine extract is used as a dispersion phase, the controlled-release Pickering emulsion with growth regulation and bacteriostasis effects is prepared, the prepared emulsion is sprayed on berries to form a film layer, the growth process of the berries can be regulated, the fruit yield and quality are improved, and the quality of the berries is improved. And antibacterial substances can be slowly released for preservation when berries are picked and stored.

The utility model discloses a corn and soybean strip-shaped composite planter, and relates to the technical field of composite planters. A lifting block is connected to the outer portion of the lead screw in a sleeving mode, a plurality of pitch changing grooves are formed in the middle of the lifting plate, an upper sliding rod and a lower sliding rod are fixedly connected to the middle of the right sliding rod and the middle of the connecting piece, a movable rod and a fixed rod are connected to the outer portion of the upper sliding rod and the outer portion of the lower sliding rod in a sleeving mode, and a sliding block is fixedly connected to the top of the movable rod. The characteristics that the growth characteristics of two seeds are complementary and the planting seasons are the same are utilized, the yield of soybeans is increased, lifting plates fixedly connected to the inner sides of lifting blocks can ascend or descend to enable sliding blocks to slide in variable-pitch grooves, and the transverse distance between seed storage boxes is changed under the longitudinal fixing action of upper sliding rods and lower sliding rods, so that the yield of the soybeans is increased. Therefore, when different varieties of soybean seeds and corn seeds are planted in a mixed manner, proper spacing is set, so that the corn seeds and the soybean seeds can stably grow under the condition of sufficient illumination.

The invention relates to a symbiotic planting and breeding process of grapes and rana nigromaculata, which realizes resource sharing and environment optimization of grape planting and rana nigromaculata breeding by reasonably utilizing land resources and ecological resources, improves the economic benefits of the grapes and the rana nigromaculata, and realizes symbiotic co-utilization. The technology comprises three aspects of capital construction, cultivation and planting, comprehensively considers the planting requirements of grapes and the growth environment of rana nigromaculata, realizes the maximum utilization of land resources and ecological resources through reasonable technology design and optimization, reduces the incidence rate of diseases, and improves economic benefits. The symbiotic planting and breeding technology covers the content from capital construction facility design, breeding technology implementation, planting technology implementation, management and maintenance and the like, efficient resource utilization and environmental protection are achieved by integrating the ecological characteristics of the rana nigromaculata and the grape planting requirements, remarkable economic and ecological benefits are achieved, and the method is suitable for large-scale popularization and application. And the dual purposes of environmental friendliness and cost saving are achieved, and the method has high application value and popularization prospects.