103 results about "Eucalyptus" patented technology

The invention discloses a Burkholderia sp. Strain and an application thereof in prevention and treatment of eucalyptus blight. The Burkholderia sp. AS-SF-1 disclosed by the invention has the preservation number of GDMCC (Graphical December Microorganism Center) No. 66223; the culture and volatile matter of the strain can inhibit growth of various forest pathogenic bacteria, the eucalyptus has a remarkable control effect on branch blight, siderophore can be generated, absorption and utilization of iron can be promoted, various types of carbon sources or nitrogen sources can be utilized, and the strain can grow within the pH range of 4-9. The burkholderia sp. AS-SF-1 disclosed by the invention has an important application value on planting of eucalyptus and prevention of diseases.

The invention discloses a bacterial strain capable of degrading silicate, the bacterial strain is bacillus nissi L114 (Niallia nealsonii), the bacterial strain is preserved in the China General Microbiological Culture Collection Center, the preservation number is CGMCC No.32592, the preservation date is November 12, 2024, and the preservation address is Institute of Microbiology, Chinese Academy of Sciences, No. 3, No.1 yard, Beichen West Road, Chaoyang District, Beijing. The bacillus nissi L114 can normally grow in a silicate bacteria culture medium, has the effect of degrading silicic acid and can degrade silicate in soil, and experiments prove that the strain has the effect of promoting the growth of eucalyptus and meets the needs of forestry development.

The invention provides a traditional Chinese medicine gel emplastrum for treating gouty arthritis and a preparation method thereof, the traditional Chinese medicine gel emplastrum for treating gouty arthritis at least comprises a gel layer loaded with a traditional Chinese medicine extract, the traditional Chinese medicine extract comprises the following raw materials: semen coicis, cortex phellodendri, radix clematidis, kadsura coccinea, rhizoma atractylodis, rhizoma dioscoreae hypoglaucae, red psychotria leaf, alangium platanifolium, kadsura pepper stem, radix aconiti, radix aconiti agrestis, semen strychni, frankincense, myrrh, angelica sinensis, safflower carthamus, radix cyathulae, radix paeoniae rubra, rhizoma smilacis glabrae, lycopodium clavatum, radices hemerocallis, weeping willow twig, evodia lepta, swamp mahogany, radix sophorae flavescentis, herba andrographitis, Chinese lobelia, coptis chinensis, edible tulip, cassia twig, pepper and borneol; a matrix of the gel layer is prepared from the following raw materials in parts by weight: silk fibroin, polyvinyl pyrrolidone, azide-polyethylene glycol-carboxylic acid, 1-ethynyl cyclopropyl carboxylic acid, 2, 5-dicarboxylic acid-3, 4-ethylenedioxythiophene and glycerol. The traditional Chinese medicine gel emplastrum disclosed by the invention can achieve a good treatment effect through percutaneous absorption.

The invention relates to the technical field of tree root fertilization, in particular to an ecological forest-based fertilization device which comprises a walking frame, two universal wheels mounted on two sides of the walking frame and two handles mounted at the top of the walking frame and located on one sides of the universal wheels, the walking frame is U-shaped, moving ports are formed in two sides of the interior of the walking frame, and the moving ports are communicated with the walking frame. A supporting frame penetrates through the moving opening in a sliding mode, and a vertical position adjusting mechanism used for synchronously driving the supporting frame is arranged on the walking frame. According to the fertilization device based on the ecological forest, rapid pit digging around the root systems of eucalyptus can be achieved, it is guaranteed that the dug pits are crescent-shaped, and the effect of synchronous and uniform fertilization can be achieved while the crescent-shaped pits are dug out, so that fertilizer is stably scattered into the crescent-shaped pits according to the shapes of the crescent-shaped pits; furthermore, the effect of uniformly fertilizing a large number of eucalyptuses in the ecological forest is ensured, the diffusion of root systems of the eucalyptuses is ensured, the stable growth of the eucalyptuses is ensured, and meanwhile, manpower is saved.

The invention discloses a method for extracting parameters of a (subtropical) eucalyptus man-made forest based on an unmanned aerial vehicle laser radar. The method comprises the following steps: investigating a sample plot, and measuring and calculating actual forest parameters such as average diameter, average height, sectional area, stand volume and the like; acquiring and preprocessing high-density unmanned aerial vehicle laser radar point cloud data, and extracting three types of feature variables of height, density and vertical structure; deducing a model structural formula on the basis of a stock different-speed growth equation, and screening variables according to rules; constructing a power model by using a regular exhaustion method; the optimal model is screened out through model parameter estimation, inspection, significance analysis and the like. According to the method, the variable synergistic effect is mined through the exhaustion method, the multi-dimensional test system is constructed, and the exclusive model is customized, so that the problems of one-sided variable screening, insufficient model reliability and poor specific forest stand adaptability in the prior art are solved, high-precision estimation of core forest parameters is realized, and the method is suitable for large-scale popularization and application. And scientific and effective technical support is provided for refined management and sustainable operation of eucalyptus man-made forest resources.

1. Name of the designed product: packing bottle (Chinese mugwort ash mask powder). 2. Use of the designed product: for containing articles. 3. Design points of the designed product: combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view.

1. Name of the product in this design: Coaster (Orchid). 2. Purpose of this design: For use as a coaster. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key features: the front view.

The invention discloses a composite operation mode and method for improving interplanting melaleuca alternifolia after intermediate cutting of eucalyptus, and the method comprises the following multiple key steps: forest stand selection: selecting a hybrid eucalyptus clone forest stand of more than 4 years old; during intermediate cutting and soil preparation, strip-shaped intermediate cutting is carried out along a contour line, soil is improved in a targeted mode, and a composite modifier containing a functional microbial agent and the like is applied; interplanting: selecting high-quality container seedlings, and standardizing field planting to guarantee the survival rate; fertilization management is carried out according to the growth stages of eucalyptus and melaleuca alternifolia, a special slow release fertilizer is researched and developed, and nutrient requirements are accurately matched; through differentiated nutrient design, functional microorganism cooperation and slow release technology regulation and control, plant growth is effectively supported, essential oil quality and forest stand productivity are improved, short-term income and long-term operation are balanced, rhizosphere microenvironment is improved, chemical input negative effects are reduced, the advantages of the method in efficient utilization of resources and ecological sustainability are verified, and the method is worthy of popularization and application. A feasible technical scheme is provided for eucalyptus compound management, and the method has popularization and application values.

The invention belongs to the technical field of forestry engineering, and provides a castanopsis hystrix improved variety and eucalyptus mixed forest litter resource regulation and control method, which comprises the following steps: setting a quadrat region based on a castanopsis hystrix and eucalyptus mixed forest, and dividing an ecological conflict region; calculating a litter load threshold value of the ecological conflict area and dividing a high-load area; regulating and controlling litters in the high-load area, and performing demand analysis based on the regulated and controlled high-load area to obtain a decomposition demand coefficient; judging whether the high-load area is a strong decomposition area or not, performing secondary regulation and control on the strong decomposition area, obtaining a periodic decomposition rate and judging whether the periodic decomposition rate accords with expectation or not; if so, acquiring related growth data of the castanopsis hystrix in the regulation and control region twice, and performing growth analysis on the castanopsis hystrix to obtain an average growth index; evaluating the growth state of the castanopsis hystrix based on the average growth index; the method is beneficial for improving the pertinence and effectiveness of ecological management of the mixed forest.

The present application relates to the technical field of fungus cultivation, and particularly relates to a high-nutrition-conversion-rate boletus edulis planting method. The method comprises the following steps: fermenting sugarcane residue to obtain fermented sugarcane residue; mixing the crushed fermented sugarcane residue and eucalyptus wood chips with soybean powder, oat powder and lime powder to obtain a cultivation substrate with a water content of 50-55% by adding water; bagging, sterilizing and cooling the cultivation substrate to obtain a treated cultivation substrate; inoculating boletus edulis liquid strain into the treated cultivation substrate, and culturing in the dark to obtain boletus edulis mycelium; covering the surface of the boletus edulis mycelium with paddy field soil, controlling temperature and humidity, and culturing under light, then adjusting temperature and humidity, and continuing to culture for 5-7 days to obtain high-nutrition-conversion-rate boletus edulis. The planting method effectively improves the nutritional components in boletus edulis, reduces the production cost of boletus edulis, reduces the strain culture time, has strong anti-miscibility, and has high nutrition conversion rate.

The invention discloses a preparation method of a mikania micrantha active extract based on high-temperature water extraction and application of the mikania micrantha active extract in promoting growth of eucalyptus, and belongs to the technical field of plant resource utilization and agriculture and forestry. The method comprises the following steps: crushing mikania micrantha which is naturally dried in the shade, adding a solvent according to a proper material-liquid ratio, performing reflux extraction at high temperature by adopting mikania micrantha extraction equipment, and filtering to obtain an active extract. After the extract is diluted, eucalyptus seedlings are irrigated, and the plant height and the ground diameter increase can be remarkably increased and are respectively increased by 13.5% and 16.4% compared with those of a normal-temperature extraction group. The method is easy and convenient to operate, high in extraction efficiency, environmentally friendly, free of organic solvents and pure water and suitable for popularization of basic forest farms and nursery gardens, and high-value utilization of mikania micrantha is achieved.

The utility model relates to the technical field of eucalyptus cultivation, and discloses a eucalyptus seedling cultivation device which comprises a bottom plate, side plates arranged on the two sides of the bottom plate and a back plate arranged between the two side plates. Moving mechanisms are arranged at the four corners of the bottom of the bottom plate, limiting plates are arranged on the two side plates, a containing mechanism is arranged between the two limiting plates, a sunshade mechanism is arranged at the top of the containing mechanism, and the sunshade mechanism comprises a hanging rod arranged between the two side plates and a plurality of mounting rings arranged on the hanging rod. The utility model relates to a sunshade device, which comprises a side plate, a plurality of mounting rings and V-shaped folded plates arranged between the adjacent mounting rings, two ends of a suspension rod are fixedly connected with the side plate, the plurality of mounting rings are sleeved on the surface of the suspension rod, the V-shaped folded plate at any end is fixedly connected with the side plate, and a pull ring is arranged on the L-shaped folded plate at the other end. The early-stage growth requirements of the eucalyptus seedlings are met.

The invention discloses a method for interplanting alpinia oxyphylla under a eucalyptus forest, belongs to the technical field of forestry cultivation, and aims to solve the problems of low ecological benefit and insufficient land utilization rate of a pure eucalyptus forest. The method comprises the following steps: collecting seeds in an improved variety garden, and sowing while collecting; strong seedlings are bred through seed treatment, germination acceleration, matrix preparation and environment-friendly novel liquid enzyme fertilizer; cleaning impurities and preparing the forest land, adjusting the pH value of the land and applying base fertilizer; weeding and loosening soil after field planting, applying a resin coated slow release fertilizer, spraying a foliar fertilizer in a flowering period, and preventing and treating diseases and insect pests. Practice shows that the method can improve the transplanting survival rate of alpinia oxyphylla, gives consideration to both economic benefits and ecological benefits, and provides a feasible technical scheme for underforest economic development.

The present application provides a method for extracting short-time-span growth of eucalyptus plantations based on UAV data, and relates to the field of forest resource investigation and forestry quantitative remote sensing research. The method comprises the following steps: field investigation and UAV data collection are carried out on selected eucalyptus plantation sample plots; DEM and monthly DOM and DSM of the sample plot are obtained, and monthly CHM is obtained by subtracting monthly DSM from DEM; a training set is divided from a data set composed of 12-month CHM, each tree crown on the CHM is labeled to obtain a labeled training set, and single tree segmentation is carried out by using the training set data and deep learning algorithm to obtain a monthly single tree segmentation vector diagram; single tree height, single tree crown and DOM spectral reflectance index of the sample plot are extracted; a single tree volume inversion model of the sample plot is constructed; single tree volume of eucalyptus plantations of the sample plot is extracted every month, and the sum is obtained to obtain stand volume, so as to realize short-time-span growth extraction of single tree and stand of eucalyptus plantations.

The utility model relates to an adjustable ventilation and drainage eucalyptus seedling container, including seedling plug, the bottom of seedling plug is equipped with a plurality of air holes, distance adjusting component, distance adjusting component is installed below seedling plug, and distance adjusting component is used for adjusting the ventilation and drainage degree in seedling plug, and distance adjusting component includes two symmetrical side plates installed on both sides of seedling plug and bottom plate, the sliding slot of setting up on both sides of seedling plug is set up on the side wall of two side plates corresponding, and bottom plate is located in the just below seedling plug and between two side plates, the top of bottom plate is fixedly installed with a plurality of struts in each air hole just below, through the use of distance adjusting component and pressing assembly, the ventilation and drainage degree in seedling plug can be better adjusted, can make eucalyptus sapling better growth, can unify fast to the multiple eucalyptus sapling in seedling plug simultaneously and push out, can improve the efficiency of eucalyptus sapling transplanting, convenient to use.

The present application relates to a kind of artificial feeding method of eucalyptus moth whole life cycle, belong to biological control technical field, egg mass is concentrated room temperature to hatch;Larva feeding environment is dark, temperature 23℃±2℃, humidity 70%±10%, 1~2 age larva group is fed with shiitake, 3~12 age larva is fed with fresh eucalyptus stem dry or branch dry;Pupa pre-feeding environment is same with larva, after body color changes into black brown, pupa is moved into emergence cage, keeps humidity 80%±10%, temperature 25℃±2℃, female pupa is 2℃~3℃ higher than male pupa, dark;Emergence adult is placed into net cage with length width height 9.6m×4m×8m and no light source in periphery, keeps female and male sex ratio in net ≤1:3 so that female and male moth copulation and lay eggs.The present application can make eucalyptus moth complete whole generation, its environmental condition is easy to control, feed is easy to obtain, simple operation, workload is small, especially solve the problem that adult mating is difficult and difficult to breed offspring.

The invention provides a method for dynamically regulating and monitoring the temperature of an inner cavity of a Chinese mugwort inflatable bed, which comprises the following steps: acquiring real-time moisture content data and an expansion image of a Chinese mugwort leaf in a Chinese mugwort sample area, and extracting contraction characteristics of the Chinese mugwort leaf to obtain a moisture content reduction degree; collecting the volatile concentration of the wormwood smell, scanning the temperature distribution of the bed body, and identifying a temperature non-uniform region in combination with the water content reduction degree; identifying the softening degree of wormwood leaves and the local supporting strength of the bed body according to the non-uniform temperature region, and determining a target temperature release range; a dynamic heating instruction is generated according to the target temperature release range, local temperature distribution is adjusted, and meanwhile the volatile matter concentration of the corresponding area is obtained; meanwhile, the smell diffusion rate change and the smell intensity change after the temperature release range is adjusted are obtained, and the temperature sensitive response is evaluated; and fusing the dynamic change index of the volatile component proportion and the temperature sensitive response evaluation result to optimize the heating adjustment parameter.

The application relates to the medical technology field and relates to a rhinitis spray and a preparation method thereof. The rhinitis spray comprises, in percentage by mass, 0.05-0.15% of oxymetazoline hydrochloride, 0.1-1% of sodium chloride, 0.01-0.02% of a preservative, 0.1-0.3% of a modified eucalyptus leaf extract, 0.05-0.3% of sodium citrate, and the rest is water. The modified eucalyptus leaf extract is derived from a natural plant, is safe in composition, environment-friendly, and convenient to obtain. Compared with the prior art, the rhinitis spray prepared by the application has good curative effect, high stability, and can more effectively relieve rhinitis symptoms.

This invention relates to the field of biocontrol technology, specifically to a method and application for inhibiting the growth of *Mikania micrantha* using a *Cervone* virus. The method includes: using *Mikania micrantha* plants as recipient material, inoculating the plants with a *Cervone* virus; culturing the inoculated plants, collecting leaves during the cultivation process; and examining the collected leaves to determine the growth status of the *Mikania micrantha* plants. This invention, by using a *Cervone* virus to infect *Mikania micrantha*, can inhibit its growth, which is beneficial for establishing a *Mikania micrantha* virus infection model and a platform for screening candidate factors for virus control.

The utility model relates to an embedded seedling raising bag for optimizing the growth environment of eucalyptus seedlings, which comprises a seedling raising bag body, and a plurality of mounting holes and a plurality of annularly arranged vent holes are formed in the side wall of the seedling raising bag body; the inner bags are arranged in the seedling culture bag body and used for culturing eucalyptus seedlings, the number of the inner bags is consistent with that of the mounting holes, ports of the inner bags are fixedly connected with the inner walls of the mounting holes respectively, and the inner bags are located above the vent holes; by using the seedling raising bag body, the mounting hole, the vent hole, the inner bag, the vent rod, the first air inlet and the second air inlet, when eucalyptus seedlings in the seedling raising bag body are taken out, original planting soil can be prevented from being separated from roots of the eucalyptus seedlings, survival of the eucalyptus seedlings is facilitated, common transplanting of the inner bag and the eucalyptus seedlings can be facilitated, and the seedling raising efficiency is improved. Meanwhile, the multi-family eucalyptus seedlings in the seedling raising bag body can be better ventilated, and cultivation of the eucalyptus seedlings is facilitated.

The invention discloses a method for improving the nitrogen utilization rate of eucalyptus in the field of forestry cultivation. The method comprises the following steps: deeply plowing a forest land before planting, measuring the nitrogen content of soil, preparing an activating agent containing citric acid, humic acid and ammonium molybdate, spraying, and shallow raking and uniformly mixing; ditching along planting rows, applying an MPCM material, earthing, and applying a microbial activator containing N-acyl homoserine lactone, trehalose and monopotassium phosphate through drip irrigation, so that a root system is in moderate contact with the material; the loss-control nitrogen fertilizer and the MPCM material are mixed in the planting period, the fast-growing period and before canopy closure, and then annular furrow application is carried out; by monitoring the nitrogen conditions of rhizosphere soil and leaves, a nutrient solution containing amino acid chelated nitrogen, urea and trace elements is sprayed on the leaf surfaces in good time. The MPCM material is prepared by performing pyrolysis on eucalyptus residues to prepare a charcoal substrate, performing metal doping and intelligent polymer grafting, loading nitrogen-fixing bacteria and ammonifying bacteria, and performing activation, so that accurate supply and efficient utilization of nitrogen are realized, and the growth benefits of eucalyptus are effectively improved.

The invention relates to application of bacillus altitudinis B6 with phosphorus and potassium solubilizing and growth promoting functions in promoting the growth of eucalyptus. The strain has various phosphorus and potassium dissolving capacities, activates insoluble phosphorus and potassium in soil, promotes absorption of inorganic phosphorus by plants, improves nutrients of phosphorus and potassium in the plants, also has IAA production capacity, promotes plant root development and plant growth, and has a remarkable growth promoting effect. In the application process, the strain is pollution-free, residue-free and biologically environment-friendly, is a growth-promoting strain with a good application prospect in the field of plant growth promotion, and has an excellent application prospect.

The invention is applicable to the technical field of sewage treatment, and provides a biological composite sludge conditioner and an application method thereof, the biological composite sludge conditioner comprises a sludge decomposition component A, a sludge recombination component B and a sludge flocculation component C; the sludge decomposition component A comprises camphor, camphor wood oil, limonene, a flavonoid compound, tannin, eucalyptus oil and cineole; the sludge recombination component B comprises plant alkaloid; the sludge flocculation component C comprises mucus protein, polysaccharide substances and kaolin; preferably, the camphor and the camphor wood oil are from camphor tree leaves; the limonene and flavonoid compounds are derived from citrus leaves; the eucalyptus oil and the cineole are from eucalyptus leaves; the tannin is selected from citrus leaves and eucalyptus leaves; the plant alkaloid is selected from tea leaf powder, eggplant leaf powder and boxthorn leaf powder; the mucus protein and polysaccharide substances are from taro powder and Chinese yam powder. According to the scheme, resources can be recycled, secondary pollution is avoided, and environmental friendliness is achieved.

The invention provides a micromolecular organic carbon water-soluble fertilizer for promoting lignification of eucalyptus, and a preparation method and application thereof, and belongs to the technical crossing field of microorganisms, forestry and organic water-soluble fertilizers. The micromolecular organic carbon water-soluble fertilizer for promoting eucalyptus lignification comprises the following components in parts by weight: 3-5 parts of a biological agent, 10-20 parts of food industry leftovers, 20-30 parts of an organic solid fertilizer, 5-15 parts of sodium silicate, 10-20 parts of monocalcium phosphate, 5-15 parts of potassium chloride, 5-15 parts of magnesium nitrate, 5-15 parts of sulfur coated urea, 0.1-0.5 part of a rooting agent, 0.5-1 part of a trace element composite nutrient solution, 5-50 parts of deionized water and 1-3 parts of a pH regulator. The biological agent is prepared by fermenting a new bacillus tequilensis strain, namely, bacillus tequilensis XD63Y, and the collection number of the bacillus tequilensis XD63Y is GDMCC No: 62521. The organic solid fertilizer is prepared by crushing plant straws and then performing composting or fermentation treatment. The micromolecular organic carbon water-soluble fertilizer provided by the invention can promote the growth and lignification process of the eucalyptus, shorten the growth cycle of the eucalyptus, increase the yield of the eucalyptus and enhance the disease and pest resistance of the eucalyptus.

The invention relates to the technical field of prevention and control of soil termites, in particular to a soil termite attractant as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) taking camphor tree barks and / or eucalyptus barks as raw materials, and extracting by adopting a mixed solvent containing ethanol, diethyl ether, ethanone, water and normal hexane; and (2) filtering the leach liquor obtained in the step (1), and drying the filtrate to obtain the traditional Chinese medicine composition. The attractant for the soil-dwelling termites is added into common bait for the soil-dwelling termites, so that the common bait can attract the soil-dwelling termites for feeding in a long distance, the appetite of the soil-dwelling termites can be increased, the feeding amount of the soil-dwelling termites in unit time can be increased, and the purpose of accurately and quickly monitoring the soil-dwelling termites or killing the soil-dwelling termites is achieved.

The invention relates to the technical field of forestry equipment, and particularly discloses a light electric-drive remote-control eucalyptus pruning device, which comprises a climbing structure, which is composed of a support frame and two crawler-type moving assemblies symmetrically arranged on two sides of the support frame at 90 degrees; the cutting structure is arranged on the front portion of the climbing structure and comprises a main cutting tool arm arranged on the top of the supporting frame and side cutting tool arms symmetrically distributed on the outer sides of the two crawler-type moving assemblies; the limiting structure comprises a hydraulic mechanism fixed to the supporting frame, a limiting rod rotationally connected with the crawler-type moving assembly on any side and a limiting wheel arranged at the end of the limiting rod, a triangular plate is hinged to the output end of the hydraulic mechanism, the first end of the triangular plate is hinged to the limiting rod, and the second end of the triangular plate is connected with the surface of the limiting rod through a spring; through combination of electric-drive remote control and the right-angle crawler climbing system, efficient and accurate pruning of eucalyptus high-altitude side branches is achieved.

The present application provides a method for retrieving the age of eucalyptus plantations based on time series satellite images, which belongs to the technical field of forest resource investigation and quantitative remote sensing of forestry. The method can more quickly and accurately obtain the age data of eucalyptus plantations, making up for the shortcomings of traditional methods for obtaining the age of eucalyptus plantations, such as time-consuming, labor-intensive, high cost, and long data acquisition period. The use of long time series remote sensing image vegetation index before and after eucalyptus felling for age retrieval can make up for the shortcomings of the relationship between age and remote sensing spectral reflection to establish an age retrieval model to retrieve the age, and realize the accurate extraction of time series age. By using a spatio-temporal fusion algorithm to spatio-temporally fuse high spatial resolution satellite remote sensing images and low spatial resolution satellite remote sensing images, the missing image data that cannot be used due to cloud and rain in a month is reconstructed, a complete time series image is constructed, and the age of eucalyptus plantations is accurately retrieved to the monthly scale.

This invention discloses a method and system for inverting the nutrient content of eucalyptus canopy leaves based on multi-feature fusion, belonging to the field of UAV remote sensing and forestry information technology. The method includes: acquiring and preprocessing multispectral image data from a UAV; extracting vegetation index features and texture features of the eucalyptus canopy; filtering the fused features based on mutual information to construct a multi-feature fusion dataset; constructing an inversion model for the nitrogen, phosphorus, and potassium content of eucalyptus leaves using a random forest regression algorithm; and verifying and optimizing the accuracy of the inversion model. This invention effectively compensates for the information gaps of single features by fusing spectral and spatial structure information, significantly improving the inversion accuracy of eucalyptus canopy leaf nutrient content, and providing reliable technical support for precise nutrient management of eucalyptus plantations.

The utility model discloses a novel five-prevention eucalyptus core board which comprises a eucalyptus core layer, an insect prevention layer is arranged on one side of the eucalyptus core layer, a waterproof layer is arranged on the side, away from the eucalyptus core layer, of the insect prevention layer, and a flame-retardant layer is arranged on the side, away from the insect prevention layer, of the waterproof layer. An anti-deformation layer is arranged on the side, away from the insect prevention layer, of the eucalyptus core layer, and a wear-resisting layer is arranged on the side, away from the eucalyptus core layer, of the anti-deformation layer. According to the five-prevention eucalyptus core board, the insect prevention performance of the five-prevention eucalyptus core board is improved through the arrangement of the insect prevention layer, the waterproof performance of the five-prevention eucalyptus core board is improved through the arrangement of the waterproof layer, and the flame retardant effect of the five-prevention eucalyptus core board is improved through the arrangement of the flame retardant layer; through the arrangement of the anti-deformation layer, the anti-deformation capability of the five-prevention eucalyptus core board is improved, through the arrangement of the wear-resistant layer, the wear-resistant performance of the five-prevention eucalyptus core board is improved, and through the arrangement of the anti-cracking layer, the anti-cracking performance of the five-prevention eucalyptus core board is improved.

The application discloses a marker gene in the ectomycorrhizal symbiotic stage of Eucalyptus grandis EgARK1 and application thereof, and belongs to the field of plant genetic engineering and biotechnology. EgARK1 The nucleotide sequence of the gene is shown in SEQ ID NO:1, and the amino acid sequence is shown in SEQ ID NO:2. Time course analysis shows that the gene EgARK1 can be used as a marker gene for indicating the development of ectomycorrhizae, and participates in the infection of ectomycorrhizal fungi and the development process of mycorrhizal symbionts. Through functional research on the Eucalyptus grandis gene EgARK1 , the results show that the silencing of the gene has a significant influence on the development of ectomycorrhizae in the ectomycorrhizal symbiosis of Eucalyptus grandis, and the gene can be used for regulating the mycorrhizal symbiosis process of plants through transgenic technology, improving the mycorrhizal symbiosis efficiency, promoting the development of ectomycorrhizae, improving the mycorrhizal infection rate, playing an important role in regulating the development of ectomycorrhizae, and having potential application value in the directional genetic improvement of mycorrhizal plants.