180 results about "Sea grass" patented technology

The invention relates to the technical field of carbon sequestration capacity monitoring, in particular to a carbon sequestration capacity monitoring and evaluating method for an island ecosystem, which comprises the following steps: S1, multi-source data fusion and habitat partitioning: dividing an island habitat type partitioning map; s2, stratified sampling and carbon reserve actual measurement: measuring the carbon content, and constructing a carbon reserve actual measurement database; s3, constructing a dynamic carbon sink model: carrying out a whole growth cycle environment simulation experiment on sea grass and algae in different habitats, and establishing the dynamic carbon sink model taking habitat types as classification units; s4, carbon sequestration capability quantification and bottleneck diagnosis: calculating carbon sequestration contribution values of various habitat types, identifying low-efficiency carbon sequestration areas through contribution value comparison, and analyzing environmental limitation factors of the low-efficiency carbon sequestration areas; and S5, integrating a sink increasing technology and generating a path: designing a habitat specific sink increasing scheme for the identified low-efficiency carbon sink area. According to the invention, high-precision monitoring, intelligent evaluation and system optimization of the island ecosystem carbon sequestration capability are realized.

The invention provides an ecological restoration area sea grass bed health state monitoring method, and relates to the technical field of sea grass bed ecological restoration, and the method comprises the steps: obtaining a sea grass bed ecological region, carrying out the region division, and determining a plurality of sea grass bed monitoring regions; according to the image sensor, combined with the image feature detection channel, sea grass state feature analysis is carried out, and a plurality of sea grass state feature analysis results are generated; performing illumination detection feature analysis according to the illumination sensor in combination with the illumination feature analysis channel, and generating a plurality of illumination detection feature analysis results; and carrying out abnormity management on the corresponding sea grass bed monitoring area, carrying out abnormity linkage analysis and carrying out abnormity management. The technical problems that the prior art is limited by resolution and environmental factors, the microscopic state change of the sea grass bed cannot be accurately captured, the health state of the sea grass bed is difficult to comprehensively analyze by integrating multiple monitoring dimensions, and the accuracy and comprehensiveness of state monitoring of the sea grass bed are insufficient are solved.

The invention discloses a dynamic sea condition ship-machine cooperative attitude control system and method for sea grass transplantation, and belongs to the crossing field of marine ecological restoration and intelligent ship control. The system comprises a mother ship attitude control layer, a communication management layer, an underwater operation end and a sensor network layer, the mother ship attitude control layer, the communication management layer, the underwater operation end and sensor network layer and the mother ship attitude control layer are sequentially connected through lines; the method integrates inertial navigation, visual measurement, event-triggered communication and adaptive filtering technologies, realizes high-precision attitude synchronization and stable operation of the ship and the underwater operation device in sea conditions of four levels and below, and can be widely applied to marine ecological engineering scenes such as seaweed bed restoration, coral transplantation and submerged vegetation reconstruction. And the operation efficiency and the environmental adaptability are effectively improved.

To provide a substrate material for growing seagrass, a method for producing the substrate for growing seagrass, a shallow structure suitable for seagrass growth, and a method for constructing the shallow structure, which are applicable when nitrogen cannot be supplied from the underlying layer to seagrass such as eelgrass or when the nitrogen supply amount from the underlying layer is insufficient, and which enable suppression of redispersion into mud after immersion in water and resistance to drift caused by waves or tidal currents.SOLUTION: The substrate material for growing seagrass comprises, as a main raw material, granular matter with a particle size of 25 mm or less, which is formed by solidification of a mixed material obtained by mixing dredged soil, steelmaking slag, a strength-increasing agent, and a nitrogen-supplying material.SELECTED DRAWING: Figure 1

The utility model discloses a sea grass seedling rope transplanting device and relates to the technical field of marine ecological restoration. The sea grass seedling rope transplanting device mainly comprises a supporting walking structure, a seedling rope guiding frame structure and a seedling rope transplanting structure, wherein the seedling rope transplanting structure comprises a coulter assembly, a soil covering structure, a compaction wheel and the like; the device is tightly attached to the surface of a seabed to walk and operate under the action of self weight, artificial sea grass seedling or adult plant transplanting bundle units which are connected in series and bound by taking a rope belt as a medium are sequentially conveyed into C-shaped grooves formed by the coulter assembly under the action of the guide structure, and the transplanting operation is completed after the artificial sea grass seedling or adult plant transplanting bundle units are buried by the soil covering structure and compacted by the compaction wheel, so that construction can be assisted by manpower, and the transplanting efficiency is improved. The equipment is simple in structure, convenient to construct and operate on the sea, high in sea condition adaptability, free of loss of transplanting units, standard and normative in transplanting depth, and capable of greatly reducing the operation intensity, improving the operation efficiency and improving the transplanting seedling rate.

The invention discloses scouring protection and seaweed restoration integrated ecological solidified soil and a preparation method thereof, and belongs to the technical field of ocean engineering and ecological restoration. The material is prepared from the following components in parts by weight: 800 to 1000 parts of sea mud, 200 to 400 parts of calcined coral sand, 50 to 150 parts of a modified chitosan gelling agent, 100 to 200 parts of a silicate geopolymer, 100 to 250 parts of slow-release nutritional ceramsite, 50 to 120 parts of seaweed seeds, 80 to 160 parts of a seawater activating agent and 20 to 50 parts of a microbial carrier loaded with saline-alkaline tolerant bacteria. The material has the characteristics of underwater dispersion resistance and self-leveling, can resist scouring at the flow speed of 2.5 m / s, and realizes that the 30-day accumulative germination rate of sea grass is greater than or equal to 80%. The method breaks through the bottleneck of function splitting of traditional material engineering protection and ecological restoration, synchronously completes scouring protection and seaweed community reconstruction, and is suitable for ocean engineering scouring protection and seaweed ecological restoration engineering.

The utility model relates to a sea grass cultivation device which comprises a cultivation tank, a first water inlet, a first water outlet, a second water outlet and a cultivation chamber used for cultivating sea grass, the cultivation chamber is located at the bottom of the cultivation tank, and a matrix is laid in the cultivation chamber; the first water inlet is located in the first side of the cultivation tank. The first water outlet and the second water outlet are positioned on the second side of the cultivation tank; the water pumping assembly comprises a water pump and a water inlet pipe, the water inlet pipe is communicated with the first water inlet, and the water pump is arranged on the water inlet pipe; the drainage control assembly comprises a drainage pipe and a drainage control valve, the first water outlet communicates with the drainage pipe, and the second water outlet communicates with the drainage pipe through the drainage control valve; and the controller is connected with the water pump and the drainage control valve. The sea grass cultivation device capable of simulating the tide is favorable for better simulating the growth environment of the sea grass, so that the indoor simulation scientific research experiment result of the sea grass is closer to the natural state.

The invention relates to the technical field of sewage treatment, in particular to a modified basalt fiber, a preparation method of the modified basalt fiber and a biological membrane filler containing the modified basalt fiber. The prepared basalt fibers and polyester fibers are blended into fiber bundles which are blended on the fixed base layer to form the biological membrane filler, the fiber bundles are distributed on the surface of the fixed base layer in a seaweed shape, the fiber bundles are distributed in a vertically staggered mode, more attachment points can be provided for growth of microorganisms, meanwhile, the contact time of water flow and a biological membrane is prolonged, and the biological membrane filler is more stable. The biofilm culturing amount and the biofilm culturing speed of the biofilm are improved, and the biodegradability of the biofilm is enhanced; meanwhile, the fixed base layer is made of a flexible material, so that compression during transportation is facilitated, and the storage and transportation cost is reduced.

The invention discloses an ecological restoration system for mangrove forest wetlands, and relates to the technical field of ecological restoration of coastal wetlands, and the technical key points are as follows: the ecological restoration system comprises an algae-cleaning biocenosis: the number of algae is reduced through salt-tolerant algae-cleaning organisms, and the transparency of a water body is improved; the sea grass plant community comprises Sichuan fructus viticis and halophila acuminata, absorbs eutrophic substances in water through photosynthesis, and further purifies the water quality; aquatic animals comprise fishes, benthonic animals, shrimps and filter-feeding zooplanktons; the mangrove plant community is used for planting bruguiera gymnorrhiza, kandelia candel and aegiceras corniculatum in a layered manner according to tide and water depth so as to realize the functions of purifying water quality of an ecological system and providing a habitat; and the environment monitoring module is provided with tide monitoring equipment, observes tide water level change and salinity and alkalinity, and implements early warning and emergency measures under extreme climate conditions. According to the method, a multi-layer producer community system can be coupled and repaired, the eutrophication problem can be effectively solved by multi-dimensionally improving the biodiversity, and a new method is provided for coastal wetland repair.

The utility model relates to the technical field of sea grass transplanting, and discloses a sea grass transplanting device convenient to transplant, which comprises a frame body, two sides of the bottom surface of the frame body are fixedly connected with side plates, two symmetrically arranged bottom plates are connected between the two side plates in a sliding manner, and the opposite ends of the two bottom plates are connected with limiting components. The other ends of the two limiting assemblies are connected with the two sides of the frame body, and the upper surfaces of the two bottom plates abut against the bottom face of the frame body. According to the sea grass transplanting device convenient to transplant, the two side plates are arranged on the bottom face of the frame body, the bottom plates are arranged between the two side plates, the two bottom plates are limited through the limiting assemblies, when transplanting personnel transplant sea grass, the bottom plates are pulled open towards the two sides, and soil and the sea grass in the frame body can automatically fall onto seabed soil; therefore, the transplanting process can be completed.

The invention relates to the technical field of sea grass seed ball manufacturing, and discloses an automatic sea grass seed ball manufacturing device and method.The automatic sea grass seed ball manufacturing device comprises a supporting table, a rotary table is rotationally installed on the upper surface of the supporting table, and two notches are symmetrically formed in the periphery of the rotary table. The lower mold is pushed to the position under the upper mold through the pushing mechanism, the semispherical mold cavities of the upper mold and the lower mold extrude a seaweed seed mixture through the mold closing mechanism, and the seaweed seed mixture is formed into spherical seaweed seed balls; and then the mold opening action and the mold turning action are sequentially and automatically completed through the mold closing mechanism and the rotating mechanism, so that the formed seaweed seed balls in the lower mold are poured into the material receiving groove pipe and roll into an external collecting bag through the material receiving groove pipe to be collected, manual operation is not needed in the feeding, forming and discharging operation processes of a seaweed seed mixture, and the labor intensity of workers is reduced. The forming operation of the sea grass seed balls can be automatically completed, and the manufacturing efficiency of the sea grass seed balls is improved.

The invention provides a sea grass bed classification method based on feature screening under a small sample limitation condition, which belongs to the technical field of marine surveying and mapping, extracts airborne LiDAR sounding data and hyperspectral image data features, completes spatial registration and fusion, screens out high contribution rate features based on a Relief-F and KPCA multi-strategy feature optimization model, and performs nonlinear dimensionality reduction. Generating a preferred feature set; establishing an edge structure based on a K-nearest neighbor strategy so as to form a graph structure with a local topological property, introducing a graph attention mechanism to adaptively update node features, and dynamically adjusting an information transfer weight according to feature similarity between samples; a prototype network is constructed based on updated node features for classification, each type of prototype is represented by a supported sample feature mean value, query samples are classified by calculating Euclidean distances between the query samples and the prototypes, the problems of feature redundancy and small samples existing in actual seaweed bed classification application are effectively solved, and the classification efficiency is improved. And an effective technical support is provided for sea grass bed identification and restoration.

The utility model discloses a shallow sea seaweed planting platform and relates to the technical field of marine ecological restoration. Comprising a traction ship, an offshore platform, a mesh belt reel, a seed mesh belt, compression rollers, degradable nails and supporting rods. The traction ship is connected with the offshore platform and can drive the offshore platform to move; the mesh belt reel is fixedly mounted on the offshore platform, the seed mesh belt is wound on the mesh belt reel, and the degradable nails are used for fixing one end of the seed mesh belt on the seabed in a needle pricking manner; one end of each supporting rod is in hinged connection with the offshore platform through a fixed hinge point, so that the supporting rods can rotate around the corresponding hinge points, the supporting rods rotate in a plane, and the net belt reel and the rotating plane are coplanar; and a compression roller is arranged at the other end of the supporting rod and can rotate on the corresponding end point of the supporting rod. The planting efficiency is improved, manual operation is partially replaced, and the operation process is simplified.

The present invention discloses a device for measuring the carbon content of a seagrass bed ecosystem, and relates to the field of measuring the carbon content of a seagrass bed. The device comprises a box, a winding and transferring mechanism is installed on the top of the box, a collecting mechanism is hung on the winding and transferring mechanism, a feeding mechanism is installed on the upper surface of the box on one side of the winding and transferring mechanism, a drying and combustion chamber is provided inside the box below the feeding mechanism, a feeding port is provided on the top of the drying and combustion chamber, and a drying mechanism is installed inside the drying and combustion chamber. By setting a collecting mechanism, the present invention can collect seagrass samples by hoisting and suspending the first clamp and the second clamp, replacing the manual diving collection method, and completing rapid collection; by setting a feeding mechanism, the first clamp and the second clamp can be automatically opened, so that the collected seagrass samples automatically fall and are put into the next process.

The invention relates to a seawater degradable seedling raising frame and a preparation method and application thereof.The preparation method of the seawater degradable seedling raising frame comprises the following steps that (1) modified biodegradable plastic is prepared, specifically, a non-enzymatic seawater degradation accelerator, an enzymatic seawater degradation accelerator, a surface hydrolysis inhibitor and a small amount of biodegradable resin are mixed and subjected to melt extrusion, and the modified biodegradable plastic is obtained; the extrusion temperature is 140-180 DEG C, high-concentration master batches are prepared, the master batches and the remaining biodegradable resin are mixed, melt extrusion is conducted again, the extrusion temperature is 160-190 DEG C, cooling and granulation are conducted, and the modified biodegradable plastic is obtained. (2) modified biodegradable plastic is placed in an injection molding machine, heated to a molten state and then injected into a seedling raising frame mold, demolding operation is conducted after injection molding is completed, and the seawater degradable seedling raising frame is formed and can be controllably degraded to meet the requirement for the growth cycle of sea grass, is harmless to the environment and promotes recovery of a sea grass bed ecological system; sustainable marine ecological restoration is realized.

The invention discloses a bionic stingray type underwater patrol robot based on annular fin propulsion, and belongs to the technical field of underwater robots, the bionic stingray type underwater patrol robot comprises a waterproof shell, an annular flexible fin and an annular fin propulsion mechanism; the annular fin propelling mechanism comprises an annular mounting plate, a plurality of first steering engines are uniformly arranged on the annular mounting plate in the circumferential direction, fin rays extending in the radial direction of the annular mounting plate are arranged at the output ends of the first steering engines, and the fin rays are fixedly connected with the annular flexible fins; the fin ray comprises a connecting base connected with the output end of the first steering engine, and a clamping jaw used for clamping the annular flexible fin is rotationally matched with the connecting base. A traditional propeller is replaced with bionic fluctuating propulsion of the annular flexible fins, the winding risk is fundamentally avoided, the bionic fluctuating fin propulsion mode is small in water flow disturbance and low in noise, the bionic fluctuating fin propulsion device is suitable for the environment sensitive to water flow or needing hidden operation, and interference to sea grass or surrounding ecology is avoided.

The invention provides a batch production process of a marine matrix in a naked spot repairing area of a seaweed bed, and belongs to the field of ecological restoration of the seaweed bed, and the batch production process comprises the following steps: S1, sampling the marine matrix in the naked spot repairing area and carrying out a particle analysis experiment; s2, marine matrix outsourcing soil source detection and purchase; s3, screening and mixing an outsourcing soil source; s4, sampling and detecting the mixed marine matrix; and S5, bagging and storing. The marine matrix batch production process provided by the invention is simple and easy to implement, has low operation requirements, can reconstruct a matrix environment suitable for the sea grass bed in a sea grass bed bare board repair area, and provides a good matrix source for large-scale repair of sea grass in the sea grass bed bare board repair area.

The utility model provides a limiting mechanism which is used for limiting the depth of a planting shovel inserted into the underwater ground, and the planting shovel comprises a pipe body used for conveying sea grass seeds or sea grass seedlings downwards and a shovel body connected to the lower end of the pipe body; the limiting mechanism comprises a hoop seat, a limiting piece connected to the hoop seat in an up-down sliding mode, and a locking piece arranged on the limiting piece. Wherein the locking piece is used for locking the vertical sliding freedom degree of the limiting piece, and the limiting piece is located on the side of the shovel body and used for abutting against the underwater ground so as to limit the depth of the shovel body inserted into the underwater ground. According to the limiting mechanism, the planting shovel assembly and the sea grass planting machine provided by the utility model, not only can the consistency of sea grass planting depth be ensured on an uneven underwater ground, but also two operation modes of seeding and seedling planting can be realized under the condition that a seeding shovel is not replaced.

The utility model discloses an ecological sea grass bed structure based on blue carbon effect, which comprises a planting bed, one side of the planting bed is provided with a fixing mechanism used for fixing the planting bed, the fixing mechanism comprises a ground nail, a connecting rod, a spiral piece, a twisting block, a fixing ring and a hook, the ground nail is arranged on one side of the planting bed, and the spiral piece is arranged on the other side of the planting bed. A connecting rod is fixedly arranged at the upper end of the ground nail, a spiral piece is fixedly arranged on the surface of the outer side of the ground nail, a screwing block is fixedly arranged on the outer surface of the upper end of the connecting rod, a plurality of fixing rings are evenly and fixedly arranged on the surface of the connecting rod and located on the periphery of the lower end of the screwing block, and hooks are fixedly arranged at the four corners of the surface of the outer side of the planting bed. The device is good in using effect, a planting bed structure for artificial sea grass planting can be conveniently and rapidly laid on the seabed, the fixing and anchoring effect of the device is better, and therefore the planting bed can be effectively prevented from displacing and deviating from the preset planting position along with flowing impact of seabed water flow.

The utility model relates to the technical field of aquaculture net cages, in particular to a net cage-based suspension type monitoring device, which comprises a netting arranged between a floating frame and a counter weight, the floating frame is fixedly connected with an upper line of the netting, a monitoring buoy is arranged at the top of the floating frame through a central floating platform, an acquisition monitoring device is arranged in the monitoring buoy, and the acquisition monitoring device is connected with the counter weight. The collecting and monitoring device comprises a monitoring lens and a collecting head connected through a collecting pipe. Wherein a filtering part is detachably connected in the collecting head through a closing assembly, the collecting head and the filtering part are used in cooperation, seawater is filtered and extracted, the underwater environment can be monitored, the collecting head and the collecting pipe and the collecting head are used in cooperation to filter and extract seawater, the underwater environment is judged in a seawater analysis mode, and the underwater environment can be monitored. And the filter part can be quickly replaced through the closing assembly, so that the filter part is prevented from losing the filtering effect due to silt and sea grass blockage and attachment after long-time use.

The present invention provides a recyclable wave-proof component for underwater seagrass planting, which includes a wave-proof sleeve, a dry mud cake, a wet mud layer, and a net cover; the wave-proof sleeve is used to be fixedly placed on the underwater ground in the seagrass planting area; the dry mud cake is embedded at the bottom of the wave-proof sleeve and is used to loosen from the wave-proof sleeve under seawater immersion; the wet mud layer is laid on the upper surface of the dry mud cake, and the wet mud layer is used to fix seagrass seeds; the net cover is arranged at the top of the wave-proof sleeve and has an avoidance hole in the center, and the avoidance hole is used to avoid the growing seagrass stems and leaves. The recyclable wave-proof component for underwater seagrass planting provided by the present invention is beneficial to the smooth rooting of seagrass seeds and improves the survival rate of seagrass; the dry mud cake loosens from the wave-proof sleeve along with the seagrass rooting and the seedling process of growing stems and leaves, so as to facilitate the recycling and reuse of the wave-proof sleeve and the net cover, which can not only reduce the consumption materials for seagrass planting and save costs, but also avoid the wave-proof sleeve and the net cover being soaked in seawater for a long time and affecting water quality, thereby improving environmental protection.

The invention relates to a seagrass fiber blend yarn comprising at least two natural fibers, wherein one of the natural fibers is made from seagrass and the seagrass fibers are made from cellulose, from non-cellulose polysaccharides and from Klason lignin. Furthermore, the invention relates to a method for producing the seagrass fiber blend yarn.

The invention relates to the technical field of environmental protection, in particular to a degraded sea grass bed repairing device and method based on symbiosis of microorganisms and sea grass, and the device comprises a coated seed ball and a slow release pad which is laid on a sea grass bed and provides a planting matrix for the coated seed ball; the overall density of the coated seed balls is greater than that of seawater; the coated seed ball comprises sea grass seeds, the sea grass seeds are coated with a microbial layer for promoting growth and development of the sea grass seeds, and the microbial layer is coated with a protective layer for protecting the sea grass seeds and the microbial layer. The slow release pad is net-shaped; through the design of the coated seed balls, sea grass seeds can smoothly settle to the position of a sea grass bed, meanwhile, the sea grass seeds can be protected and prevented from being damaged in the settling process, the surrounding environment is adjusted after settling is completed and before the sea grass seeds germinate, and then growth and development of sea grass are facilitated; the seaweed bed repairing effect is improved.

The invention discloses a sea grass preservative film and a preparation method thereof, and relates to the technical field of preservative film preparation. Aiming at the problems of serious pollution and difficult degradation of the existing plastic product, the invention takes sea grass and starch as core raw materials and is prepared by the steps of sea grass raw material pretreatment, extract preparation, gel mixture preparation, calcium ion crosslinking, airing and the like. The seaweed extract and the starch are subjected to synergistic interaction through hydrogen bond physical crosslinking and thermal gelation to form a stable film structure, the raw materials are food-grade, and the seaweed film has toughness and complete degradability, is free of harm to the environment and human bodies, can be widely applied to food packaging, field film covering, packaging products and other scenes, effectively replaces traditional plastic products, and solves the problem of plastic pollution.

The utility model relates to the technical field of sea grass processing, and discloses a cleaning machine for sea grass crude rubber production, which comprises a cleaning barrel, a feed port and a discharge port are arranged on the cleaning barrel, a manual valve is arranged at the discharge port, a cleaning part is arranged on the cleaning barrel, and the cleaning part comprises a rotating ring, a control panel and a motor. The motor is installed on the cleaning barrel and is in transmission connection with the rotating ring, the control panel is fixedly connected to the cleaning barrel, the rotating ring is rotationally connected to the cleaning barrel and the control panel, a cam groove is formed in the control panel, the rotating ring is rotationally connected with the movable arm and the fixed arm, the movable arm is rotationally connected with the fixed arm, and a torsional spring is arranged between the movable arm and the fixed arm. One end of the fixed arm slides in the cam groove, and one end of the movable arm is provided with a toothed plate. According to the sea grass cleaning device, sea grass in the cleaning barrel can be automatically stirred during cleaning; meanwhile, after the discharge port is opened, the sea grass can be automatically discharged, the machine does not need to be stopped or manually taken out, and the operation efficiency is improved.

The invention provides a sea grass bed monitoring method and system, electronic equipment, a storage medium and a program product. The sea grass bed monitoring method comprises the steps that a cruise path is set for a to-be-monitored target area; acquiring multi-modal remote sensing data of the sea grass bed in the target area according to the cruise path by taking the unmanned aerial vehicle as a carrier; sea grass features of the multi-modal remote sensing data are extracted; generating an evaluation result through a pre-trained evaluation model based on the sea grass features; and generating a vegetation condition report according to the evaluation result, wherein the vegetation condition report comprises a vegetation condition index. By fusing multispectral and visible light image data, comprehensively extracting spectral features and morphological features of the sea grass, and automatically generating an evaluation result by using an artificial intelligence evaluation model, the automation level and evaluation precision of sea grass bed monitoring are significantly improved, comprehensive and rapid diagnosis of the health condition of the sea grass bed is realized, and the method is suitable for popularization and application. And reliable technical support is provided for marine ecological protection and management.

The seagrass seed-planting system includes: a storage and agitation subassembly; a dispenser subassembly; and a pump subsystem. The storage and agitation subassembly: is configured to store a quantity of seagrass seeds in an aqueous environment; includes a set of fluid inlet ports configured to direct water into the aqueous environment to agitate the quantity of seagrass seeds; and defines an outlet aperture. The dispenser subassembly: is fluidically coupled to the outlet aperture; and is configured to dispense the seagrass seed into a sediment layer. The pump subsystem directs a flow of water from the storage and agitation subassembly through the set of fluid inlet ports, through the outlet aperture, and toward the dispenser subassembly.

The invention belongs to the technical field of ecological restoration and reconstruction of sea grass beds, and particularly relates to a precise sowing method for eelgrass seeds. The eelgrass seeds are placed on a cotton seed belt and wrapped, rolled and twisted to form a seed rope, then the seed rope is buried into sediment of a repaired sea area according to the sowing depth and row spacing at the sowing time, and the two ends of the seed rope are fixed through bamboo sticks. The eelgrass seeds are wrapped by the cotton seed belt and then sown on the seabed, so that the sea grass seeds are effectively prevented from being scoured by water flow and foraging by animals, the seed loss rate is reduced, the seed utilization efficiency is improved, and meanwhile, the sowing density can be flexibly adjusted by adjusting the plant spacing and the row spacing; in addition, a wrapping environment (weak reduction-weak oxidation environment) formed by slow degradation of the cotton seed belt can promote germination of the seaweed seeds.

The invention provides a sea grass bed bare spot repair area ocean substrate backfilling process which comprises the following steps: S1, positioning and paying off, carrying out engineering positioning according to a given bare spot pit coordinate point, establishing an axis control net, and marking the center position and the circular outer side contour position of a circular bare spot repair pit on the sea; s2, an anchoring fence which is permeable to water but not permeable to silt is installed along the outline of the outer side of the bare spot pit; s3, the ocean substrate backfilling procedure is conducted in a layered mode; s4, performing elevation and quality control before, during and after backfilling; and S5, backfilling is completed, and the anchoring fences are dismantled. The technology is simple and easy to implement, the operation requirement is low, the suspended sediment amount can be effectively controlled, by means of the backfilling technology, the matrix environment suitable for seaweed growth can be reconstructed for the seaweed bed naked spot repairing area, and the technology has important significance on large-scale repairing of the seaweed bed.