34 results about "Biological soil crust" patented technology

The invention discloses a method for artificially promoting biological soil crust formation under a photovoltaic array for ecological restoration. A spraying module, a shading module, a moisturizing module and an intelligent control system are included. The biological promoter specially used for promoting the formation of the biological soil crust comprises nutritional ingredients, bioactive substances, stress resistance factors and a micro-ecological regulator. By using the accelerant and the device, an appropriate microenvironment condition is provided, rapid growth of biological soil crust such as algae, lichen and moss is promoted, the growth activity and colonization ability of the biological soil crust can be remarkably improved, the forming speed of the biological soil crust is increased, and meanwhile, the rapid formation of the biological soil crust is promoted by transplanting the rapidly formed biological soil crust. The colonization range of the biological soil crust is further expanded. The accelerant and the device are not only suitable for severe environments such as drought and saline-alkali soil, but also can be widely applied to various ecological restoration projects such as wind prevention and sand fixation and vegetation planting in desertification regions.

The invention relates to the technical field of soil desertification treatment, and particularly provides a biological soil crust growth method suitable for desertification land, which specifically comprises the following steps: step 1, adopting local clay with specific clay content, airing, crushing, preparing slurry, and preparing a clay sand barrier unit; step 2, screening suitable sand-fixing plant seeds, performing disinfection and germination accelerating treatment, and sowing the seeds in a specific mode in a sand barrier in a suitable season; 3, by means of the synergistic effect of the clay sand barrier and the sand stabilization plants, later complex management and protection are not needed, biological soil crust can be rapidly formed within 3-4 years, sand barrier self-maintenance and plant self-maintenance growth are achieved, the sand control cost and labor intensity are effectively reduced, water and soil loss is reduced, the vegetation coverage rate and the ecological system stability are improved, and the method is suitable for large-scale popularization and application. The problem of traditional desertification control is precisely solved, and efficient treatment and sustainable ecological restoration of desertified land are promoted.

The invention belongs to the technical field of desertification ecological restoration equipment, particularly relates to a sandstorm-proof soil crust spray-seeding device, and provides the following scheme aiming at the problems that functional modules of an existing device are isolated and lack of cooperation, and materials are easily interfered and are insufficient in pretreatment in a sandstorm environment: the sandstorm-proof soil crust spray-seeding device comprises a spray-seeding bottom plate and a spray-seeding mechanism integrated on the spray-seeding bottom plate, the spray-seeding mechanism comprises a fungicide spraying assembly, a water-retaining agent spraying assembly and a seeding assembly which are sequentially arranged in the advancing direction, a square windproof cover is arranged on the outer side of a spray-seeding part of the device, a microenvironment air curtain assembly is arranged, air is sucked in through air inlet micropores in the windproof cover, and then a downward adjustable isolation air curtain is formed from bottom air outlet holes; materials are prevented from drifting away. Through deep integration of time sequence spray-seeding, targeted stirring, environment control and intelligent linkage, the problems that in the prior art, the function is single, materials are prone to losing efficacy, and environment interference is large are solved, and the purpose of efficient artificial biological soil crust construction in the complex sand environment is achieved.

The invention provides a desertification land ecological restoration method based on algae-moss composite biological soil crust. The method comprises the steps of algae and moss species screening, algae propagation, moss propagation and algae-moss co-culture, resistance domestication treatment, preparation of an algae-moss composite particle inoculant, soil preparation and microtopography optimization, field application of the algae-moss composite particle inoculant and maintenance after inoculation. According to the invention, the crust forming speed and structural stability can be obviously improved, the wind erosion resistance, water retention and nutrient fixation capabilities are enhanced, and long-term stable ecological restoration of the desertification land is realized.

The invention provides a composite microalgae preparation constructed for biological crust as well as a preparation method and application of the composite microalgae preparation, and relates to the technical field of biological soil crust repair. The composite microalgae preparation comprises chlorella with the number of FACHB-2900, chlamydomonas with the number of FACHB-1935, a sodium alginate aqueous solution and a calcium lignosulphonate aqueous solution, wherein the chlorella is purchased from a freshwater algae seed bank of Chinese Academy of Sciences. After the composite microalgae preparation is applied, the components of the sodium alginate and the calcium lignosulphonate immediately form a layer of viscous and hygroscopic liquid mulching film on the surface layer of soil, and the mulching film can be used for bonding soil particles, reducing raindrop impact and keeping moisture. In the protective layer, the fixed microalgae are activated by environmental moisture and illumination to restore activity, start to grow and perform photosynthesis, and quickly convert into a living and self-sustaining biological soil crust, so as to quickly protect and repair exposed soil.

The present invention provides a method for retrieving the coverage of biological soil crust based on a linear kernel-driven model. First, a biological soil crust index FCCI based on the radiative transfer principle is constructed. FCCI is used to extract the biological soil crust area. The Beer's law is introduced to construct a multi-angle joint equation and the corresponding solution method to estimate FCCI in the GI model. max and FCCI min . Finally, the calculation of the biological soil crust coverage FCC is completed based on the GI model. The beneficial effects are as follows: The present invention constructs a biological soil crust index based on the radiative transfer principle to make up for the deficiency of the index method based on spectral linear combination in lacking consideration of physical mechanisms; the linear kernel-driven model is introduced, and a solution method for a multi-angle index is proposed, expanding the pixel dichotomy method based on multiple angles to high-spatial-resolution remote sensing images to realize the inversion of the biological soil crust coverage with high spatial resolution; a method combining chessboard segmentation and Monte Carlo algorithm is adopted to improve the calculation efficiency of the algorithm for retrieving the biological soil crust coverage of large areas.

The utility model provides a sandy land biological soil crust strength testing device and relates to the field of soil crust. Comprising a base, a pressing device is arranged on the lower surface of the base and comprises a first fixing plate, the middle of the lower surface of the first fixing plate is fixedly connected with the upper end of a second movable block, the lower end of the second movable block is fixedly connected with one end of a first spring, and the other end of the first spring is fixedly connected with the upper end of the first movable block; the lower end of the first movable block is fixedly connected with the lower surface of a pressing plate. According to the strength testing device, through cooperative use of a pressing plate, a first movable block, a first fixing shell, a first spring, a first sliding block, a movable rod and a first fixing plate, when a strength testing mechanism conducts strength testing on soil crust, in order to prevent the situation that the soil crust falls into soil, and consequently detected data is inaccurate, the strength of the soil crust is tested; the soil surface of the detection area is pressed through the pressing plate, so that the soil crust can be prevented from falling into the soil during detection.

This application relates to the field of sand control technology, and particularly to a biological crusting sand fixation method for use in sandy areas near photovoltaic power stations. The biological crusting sand fixation method includes the following steps: dividing the sandy area of ​​the photovoltaic power station into a planting zone, a water collection zone, and a sand fixation zone; the planting zone encompasses the area of ​​the orthographic projection of the photovoltaic panels onto the sandy area; the water collection zone includes the area extending outwards by d3 from the orthographic projection line of the lower side of the photovoltaic panels onto the sandy area, where 10cm≤d3≤30cm; the sand fixation zone includes the area between any two photovoltaic panels that is not part of the water collection zone; performing a first water retention treatment on the planting zone; a second water retention treatment on the water collection zone; a third water retention treatment on the sand fixation zone; inoculating algae seed sources into the sand fixation zone, and after 4-6 weeks of growth, inoculating lichen seed sources into the planting zone. This biological crusting sand fixation method has high sand fixation efficiency, good long-term stability, low water replenishment cost, and a high success rate of biological colonization.

The application discloses a kind of coral island biological soil crust GZS001 that can promote the hydrological ecological characteristics of coral island calcareous sand, with good hydrological ecological effect, can significantly improve the ecological freshwater accumulation and circulation of coral island calcareous sand, provide stable water resources for the planting of higher vegetation, improve the nutritional status of calcareous sand, and lay a good material foundation for the ecological system repair and natural succession of coral island. At the same time, the application of this biological crust can reduce the impact on the environment, and can be widely used, with the advantages of simple operation, low cost, quick effect, easy popularization, etc.

This invention discloses the construction and application of a biocrust based on algae-fungus-bryophyte symbiosis on bare red soil slopes, belonging to the field of ecological restoration technology. By screening dominant species of algae, microorganisms, and mosses suitable for acidic, nutrient-poor, and highly volatile red soil habitats, and optimizing the symbiotic ratio and inoculation / planting techniques, a stable and highly efficient algae-fungus-bryophyte symbiotic biocrust is constructed. This biocrust can significantly improve the physical and chemical properties of bare red soil slopes, enhance soil water retention and interception capacity, inhibit ineffective water evaporation, promote seed germination and seedling establishment, and enhance slope erosion resistance. The construction method of this invention is simple to operate, low in cost, ecologically adaptable, and fast in planting, enabling rapid vegetation cover and ecosystem restoration of bare red soil slopes. It is applicable to ecological management and restoration projects in various bare red soil slope areas, such as abandoned mining sites, highway / railway slopes, bare red soil hillsides, and soil erosion areas.

The application provides a kind of biological soil crust source microbial inoculant and its application, when specifically applied to lettuce, including seed disinfection, plate germination, potting, irrigation and culture in later stage and harvest.In the planting of lettuce seedling, rhizosphere response type fertilizer is applied, which can automatically adjust the release rate of nutrients according to the change of rhizosphere pH, and plays the role of intelligent fertilizer supply;In the later stage of lettuce growth, sodium alginate composite water locking liquid is irrigated, water retaining gel is formed in the rhizosphere and zinc and phosphorus nutrients are released, realizing the dual effect of water retention and precise fertilizer supply.The application effectively improves the water and fertilizer utilization efficiency through the time sequence cooperation of the two kinds of functional preparations, and promotes the healthy growth of lettuce in all directions.

The invention discloses an intelligent desert ecological restoration system, and belongs to the technical field, the intelligent desert ecological restoration system comprises a condensed water collection device, the condensed water collection device comprises a collection device, and the bottom of the collection device is communicated with a water storage device; the rapid growth device for the biological soil crust comprises moisturizing equipment and nutrition supply equipment which are respectively connected with water storage equipment, and further comprises a culture substrate layer and intelligent monitoring equipment for monitoring the culture substrate layer. The water storage device of the condensed water collection device is connected with the moisturizing device and the nutrition supply device of the biological soil crust rapid growth device, the intelligent monitoring device carries out unified management and coordination on the whole system, and intelligent and efficient operation of condensed water collection and biological soil crust cultivation is achieved; the integrated device of the condensed water collecting device and the biological soil crust rapid growth device has the advantages of being efficient, intelligent, high in adaptability and the like, and an innovative solution is provided for desert ecological management.

The invention discloses a biological soil crust spray-seeding device, and belongs to the technical field of soil crust. The device integrates crust collecting, crushing, mixing and spray-seeding functions through the moving frame, and solves the problems of high cost and low equipment utilization rate caused by multi-equipment staged operation in the prior art. The device body is composed of a moving frame, a shovel plate, a smashing box and a mixing barrel, the rotatable shovel plate is arranged at the top of the moving frame to collect earth surface crust, and crust collection is achieved through cooperation of a guide plate and a groove. The crushing box is connected with the mixing cylinder through a communicating pipe, double crushing rollers are arranged in the crushing box, and a stirring shaft is arranged in the mixing cylinder. The collecting structure adopts a combination of a conveying belt and a placing box to convey crust, and the mixing structure realizes linkage of a crushing roller and a stirring shaft through transmission of a synchronizing wheel. The spray pipe assembly generates negative pressure through a compression air pump to adsorb mixed crust. The device integrates a multi-process function through the single moving frame, the equipment cost is remarkably reduced, the operation efficiency is improved, and the device is suitable for crust spray-seeding operation in the field of desertification control.

The invention provides a sand or dust parameterization scheme construction method considering biological soil crust, and belongs to the field of sand and dust numerical simulation, the method comprises the following steps: based on survey sampling data of a research area, obtaining a biological suitable region and a biological distribution region, and intersecting the biological distribution region and the biological suitable region to obtain a crust distribution region; performing grid division on the research area, and obtaining the soil crust coverage rate of each organism according to the crust distribution area in each grid; constructing a calculation formula of the critical friction wind speed growth rate, and calculating the critical friction wind speed growth rate in combination with the soil crust coverage rate of each organism; and constructing a soil crust sand and dust emission formula, and calculating the sand and dust emission amount according to the critical friction wind speed growth rate to complete construction of a sand raising or dust raising parameterization scheme. The problems that an existing sand raising scheme does not consider the influence of biological earth surface crust on the sand raising process and the accuracy and reliability of sand raising or dust raising simulation of a land parcel with biological soil crust are low are solved.

The invention relates to the technical field of remote sensing, in particular to a desert scene albedo simulation method and system based on a kernel-driven method, and the method comprises the steps: collecting vegetation coverage data, biological soil crust coverage data and topographic feature data, and carrying out the standardization processing of the data, generating dynamic characteristic data by utilizing time dynamic correlation and spatial distribution analysis; the method comprises the following steps: constructing a volume scattering kernel based on a Gutschick-Wiegel scattering phase function, and generating corrected volume scattering kernel data in combination with SCS + C topographic correction and a hotspot correction mechanism; constructing a geometrical optical kernel by jointly using a Li-SparseR kernel and a Rouyean kernel, and generating corrected geometrical optical kernel data by adjusting the weight through dynamic vegetation coverage parameters and combining topographic correction; and finally, combining the volume scattering kernel, the geometrical optical kernel and the isotropic kernel to generate a bi-directional reflection distribution function model, and optimizing parameters to improve the simulation precision of the red band and the near-infrared band. According to the method, the defects of hot spot effect, terrain correction and sparse vegetation optical characteristic representation in the prior art are effectively overcome.

The invention relates to the field of environmental protection scientific research equipment, in particular to a device and method for measuring the windproof efficiency of biological soil crust, and the device comprises a variable-frequency wind power system which is used for simulating different wind power intensities to carry out wind erosion on the biological soil crust; the biological soil crust tray is installed in the sand table in a sliding mode through cooperation of rolling wheels and bolts, and is used for placing different biological soil crust; the equipment supporting frame and movement system comprises a supporting frame and walking universal wheels and is used for supporting the equipment and transferring the equipment; the sand table height and angle regulation and control system is used for regulating and controlling the height and angle of the biological soil crust sand table so as to simulate different wind erosion angles; the matched chlorophyll determination system is used for determining the wind erosion condition of the biological soil crust and the change of related performance; the power supply system is used for supplying power to equipment. According to the invention, the wind erosion resistance mechanism of the biological crust on the aspects of wind prevention and sand fixation can be comprehensively determined.

The invention relates to the technical field of environmental microorganisms, in particular to a directional enrichment culture method for iron reducing microorganisms in desert soil, which comprises the following steps: using biological soil crust samples at different development stages, and adopting a specific gradient dilution, amorphous Fe (OH) 3 screening culture medium screening and continuous passage enrichment method to obtain the iron reducing microorganisms in desert soil. The iron reduction microbial community with remarkable iron reduction capability is successfully obtained. And further identifying the structure of the enriched microbial community through an amplicon sequencing technology. The invention further provides application of the enriched microorganism in the iron reduction process, and the enriched microorganism is used for reducing Fe (III) to Fe (II) and effectively promoting the iron reduction reaction. The method utilizes indigenous microorganisms in a desert ecosystem, and has the advantages of rapid enrichment, low pollution risk, strong adaptive capacity and wide application potential.

The invention belongs to the technical field of biology, and particularly relates to a comprehensive evaluation method for crust development quality of active algae in different environments. The invention creatively constructs a three-dimensional index system containing photosynthetic ability, stress response and structural morphology, and provides a comprehensive evaluation method for the development quality of algae crust based on multi-dimensional environment-biological index integration. According to the method, a three-dimensional index system of photosynthetic capacity, stress response and structural morphology is constructed, and weight calculation of factor analysis-principal component analysis and a membership function quantification mechanism are combined, so that non-destructive, quantitative and comprehensive evaluation on the development level of algae crust is realized; the problems of index singleness, methodology limitation, lack of environment-biological interaction mechanism and the like in the existing biological soil crust evaluation technology are solved, a quantifiable ecological restoration evaluation tool is provided for desertification control, and the method has a wide application prospect.

The application discloses a method for effectively improving survival rate of cryptogamic plants in an extremely arid sandy area, and relates to the field of biological soil crusts. The method comprises the following steps: establishing a crust nursery, selecting a complex microbial colony which is treated by simulating natural adversity as field inoculation material, adopting a fusional crust field breeding box arranged in a row and column mode to carry out field breeding, planting into drifting sand with the convex surface of the arc-shaped protective cover facing the wind direction, inoculating the complex microbial colony material on the first platform, and placing water-retaining slow-release fillers on the second platform; and planting special crown shrubs in the interspaces of the fusional crust field breeding box. The method solves the problems of insufficient traditional inoculation material, single variety, poor adaptability, extensive cryptogamic plant inoculation mode, simple breeding technology, poor habitat, and missing auxiliary materials, improves the survival rate of cryptogamic plants, promotes the formation of biological soil crusts, and is suitable for the extremely arid sandy area.

The invention discloses a method for effectively improving the field survival rate of cryptans in an extremely arid desert area, which comprises the following steps: establishing a crust nursery, and selecting a compound microorganism population subjected to simulated natural stress crust refining treatment as a field inoculation material; fusion type crust field breeding boxes arranged in a determinant mode are adopted to carry out field breeding, quicksand is planted in the arc-shaped protective cover with the convex face facing the incoming wind direction, a first platform is inoculated with a compound microorganism colony material, and a second platform is provided with water-retaining slow-release filler; special crown shrubs are planted between rows of the fusion type crust field breeding box; according to the method disclosed by the invention, the problems of insufficient traditional inoculation materials, single variety, poor adaptability, extensive cryptandra inoculation modes, simple breeding technology, severe habitat, lack of auxiliary materials and the like are solved by virtue of the cooperation of three technologies of a compound microorganism population, a fusion type crust field breeding box and special crown shrub shading, the survival rate of cryptandra is increased, and the survival rate of cryptandra is increased. Crust forming of biological soil is promoted, and the method is suitable for extreme drought desert areas.

The present application relates to a kind of biological soil crusts for improving salt-tolerant, and preparation method and application, the biological soil crust includes natural biological crust and 1%~5% of clay mineral of natural biological crust dry weight.This application applies clay mineral to natural biological crust, it is easy to form organic mineral aggregate structure and biological membrane-mineral structure, wherein structure body has the function of retaining water and nutrient substance, maintains the function of biological membrane expansion, and establishes a mineral barrier to external environment;Clay mineral can provide key fine-grained material and adhesive force for the formation of soil aggregate as inorganic component of biological soil crust, and provide certain protection for crust biological, so as to strengthen the ability of crust resistance and promote the role of crust formation, improve its salt-tolerant.This application can apply clay mineral directly to natural biological crust, also can form biological soil crust and then carry out sand fixation application, realize the ecological restoration of saline-alkali soil.

The invention discloses a compound fertilizer for improving acidified soil in sloping farmland by using biological soil crusts and a preparation method thereof. Straw debris, crushed citrus waste fruits, cow dung, rapeseed cake and yeast powder are stirred and mixed and then fermented and composted to obtain organic fertilizer A. Then, plant ash and a mixed bacterial solution are incorporated to obtain alkaline organic fertilizer. After the alkaline organic fertilizer is crushed, it is fully mixed and granulated with urea, phosphogypsum, potassium sulfate and superphosphate. The surface of the obtained organic-inorganic compound fertilizer is sprayed with green algae suspension and sodium alginate in sequence and dried at low temperature to obtain the compound fertilizer. The compound fertilizer of the invention can quickly form biological soil crusts when applied to the soil, reduce soil leaching, and at the same time organically combine organic fertilizer, inorganic fertilizer and microbial inoculant, and is made into spherical fertilizer for convenient mechanized fertilization, meeting the nutrient requirements of crops during the whole growth period while improving acidified soil, not only improving the availability of acidified soil, but also promoting the sustainable development of farmland.

The application discloses a kind of biological soil crust spray seeding devices, belongs to the technical field of soil crust.The device integrates crust collection, crushing, mixing and spray seeding function by moving frame, solves the problem of high cost and low equipment utilization caused by the stage operation of multiple equipment in the prior art.The main body of the device is composed of a moving frame, a shovel plate, a crushing box and a mixing cylinder.The rotating shovel plate is arranged on the top of the moving frame to collect the surface crust, and the crust is collected by the cooperation of the guide plate and the groove.The crushing box is connected to the mixing cylinder by a communication pipe, the double crushing rollers are arranged in the crushing box, and the stirring shaft is arranged in the mixing cylinder.The collection structure uses a combination of conveyor belt and storage box to convey the crust, and the mixing structure uses synchronous wheel transmission to link the crushing rollers and the stirring shaft.The spray pipe assembly generates negative pressure to adsorb the mixed crust by using a compression air pump.The device integrates multiple process functions by using a single moving frame, significantly reduces equipment cost, improves work efficiency, and is suitable for crust spray seeding operation in desert management field.

The invention relates to a method for artificially cultivating biological soil crust, and belongs to the technical field of biological soil crust cultivation, and the method for artificially cultivating the biological soil crust comprises the following steps: collecting a biological crust seed source and artificially cultivating; the biological crust seed source is collected from a sand stabilization shrub area of the Maouu sand land, and the biological crust seed source comprises algae-containing crust, lichen crust and moss crust. According to the method, the collected biological crust seed sources are subjected to refined layering treatment, 1.5 cm of the upper layer is selected for preparing crust seed powder and reserving propagules, 1.5 cm of the lower layer is selected for preparing culture soil, substrates and nutrients are provided for the crust seed powder, and the collection area of the biological crust seed sources is reduced; symbionts are formed by inoculating arbuscular mycorrhizal fungi, so that the moisture and nutrient absorption capacity of crust is greatly enhanced, and the drought resistance and the adaptability to barren sand are improved.

The invention belongs to the field of microorganisms, and discloses a strain of Coelastrus sp. LC8 separated from biological crust soil in a karst rocky desertification region, and the preservation number of the strain is CGMCC No. 41199. The starry-sky algae are high in growth and reproduction speed and high in exopolysaccharide content and soluble protein content, and after algae liquid prepared from the algae species is applied to barren sandy soil and loam, the soil water-retaining property can be improved, the soil erosion resistance can be enhanced, soil nutrients can be improved, and the soil carbon sequestration capacity can be improved. In addition, the application of the algae liquid can promote plant growth and nutrient absorption, so that the algae liquid is combined with the plants to perform efficient ecological restoration and treatment on the degraded land. The application of the invention can reduce the application cost of ecological restoration engineering, is good for the environment, and realizes sustainable and healthy development of the ecological environment.

This invention belongs to the technical field of desertification ecological restoration equipment, and particularly relates to a windbreak and sand-resistant soil crust spraying device. Addressing the problems of isolated functional modules, lack of coordination, and susceptibility to material disturbance and insufficient pretreatment in windy and sandy environments, the invention proposes the following solution: a spraying base plate and a spraying mechanism integrated thereon. The spraying mechanism includes a microbial agent spraying component, a water-retaining agent spraying component, and a seeding component arranged sequentially along the direction of travel. A square-shaped windproof cover is provided on the outside of the spraying area, along with a microenvironment air curtain component. Air is drawn in through micro-intake holes on the windproof cover and then forms a downward-facing adjustable isolation air curtain from the bottom air outlet, preventing material dispersion. This invention, through deep integration of sequential spraying, targeted mixing, environmental control, and intelligent linkage, solves the problems of single function, easy material failure, and significant environmental interference in existing technologies, achieving the goal of efficient artificial biological soil crust construction in complex windy and sandy environments.

The utility model relates to a sand creature soil crust sample collecting device which comprises a box body, a collecting structure is arranged in the box body, the collecting structure comprises a sliding rod, and the sliding rod is fixedly installed in the box body. According to the sand biological soil crust sample collecting device, a threaded nail is rotated to fix and pull out a cover plate, a movable block is pulled to take out an insertion rod from an insertion hole of a limiting rod, then a limiting plate is pulled to take out the limiting rod, the movable rod is taken down from a buckle, the movable rod is rotated to be flush with a supporting plate, the limiting plate and the limiting rod are inserted again, and then the movable rod is pulled out; the movable rod is pushed to drive the supporting plate and the collecting box to move, so that the collecting box is pushed out of the box body to collect the crust, then the collecting box is retracted into the box body under the assistance of the tension spring, and the box body can be closed by repeating the operation, so that the crust can be conveniently collected; and meanwhile, the device is convenient to carry.

The invention discloses cyanobacteria SCSIO17256 with high yield of exopolysaccharides and application of the cyanobacteria SCSIO17256 in erosion resistance of coral islands. The cyanobacteria is named as cyanobacteria Oculatus sp.SCSIO17256, and the preservation number of the cyanobacteria Oculatus sp.SCSIO17256 is CCTCC (China Center For Type Culture Collection) NO: M2025524. The cyanobacteria Ocularia sp.SCSIO17256 provided by the invention can effectively promote the formation of calcareous sand biological crust, has relatively strong sand consolidation capability and extremely strong anti-shearing capability, and can be applied to prevention and treatment of water and soil loss of coral islands and construction of coral island calcareous sand biological soil crust. Compared with physical sand consolidation, chemical sand consolidation and vegetation cultivation, microorganisms are used as a novel sand consolidation and crust cultivation mode, and the method has the advantages of being high in adaptability, low in cost, quick in effect and the like.

The utility model provides an adjustable biological soil crust puncturing device, and relates to the technical field of desert environment treatment. The device comprises a sampling piece used for puncturing and collecting biological soil crust; the sampling fixing device is used for placing and fixing a sampling piece; the sampling fixing device is arranged in the positioning frame body and can do relative motion along the axis of the positioning frame body; the puncture thickness adjusting device is used for adjusting the position of the sampling fixing device in the positioning frame body; wherein the puncture thickness adjusting device is used for adjusting the position of the sampling fixing device in the positioning frame body so as to control the protruding length of the sampling piece from one side, far away from the puncture thickness adjusting device, of the positioning frame body, so that the adjustment of the puncture thickness of the biological soil crust is realized. According to the technical scheme, the operability and accuracy of crust puncture thickness adjustment can be improved, and an efficient test sampling device is provided for quantitatively analyzing the influence of the crust thickness on an underground seed bank.

The application provides a biological soil crust sand or dust emission parameterization scheme construction method, and belongs to the field of sand and dust numerical simulation.The method comprises the following steps: obtaining biological suitable areas and biological distribution areas based on investigation and sampling data of a research area, and obtaining a crust distribution area by intersecting the biological distribution area and the biological suitable areas; dividing the research area into grids, and obtaining soil crust coverage of each biological according to the crust distribution area in each grid; constructing a critical friction wind speed growth rate calculation formula, and calculating the critical friction wind speed growth rate in combination with the soil crust coverage of each biological; constructing a soil crust dust emission formula, calculating dust emission according to the critical friction wind speed growth rate, and completing the sand or dust emission parameterization scheme construction.The application solves the problems that the existing sand emission scheme does not consider the influence of biological surface crust on the sand emission process, and the biological soil crust plot sand or dust emission simulation accuracy and reliability are low.