411 results about "Nylon mesh" patented technology

A supporting structure for a chair, the supporting structure is a seat, a back support or a headrest. A nylon mesh is fixed on the annular upper surface of an inwardly projecting flange of the frame, and then the plastic-injection-molded engaging layer is integrally formed on the exterior surface of the frame, enabling the mesh to be firmly fixed on the frame. The elasticity of the mesh provides a comfortable and adequate support for the user's buttocks, back and head, providing comfortable seating and preventing muscle soreness. Further, the heat caused by the user's body can be vented off via the apertures of the mesh, so that the user will feel cool when sitting on or leaning against the supporting structure.

The invention provides a practical technique for breeding dendrobium officinale by using artificial seeds. The invention aims to provide a technique for breeding dendrobium officinale with high efficiency and low cost. The technique comprises the following steps of: inducing dendrobium officinale seeds on a germination culture medium to obtain protocorms, then performing propagation culture on the protocorms, transferring the protocorms to MS culture solution containing 0.5mg / L of ABA to perform shaking culture (100r / min), and replacing the culture solution once every 10 days; selecting the protocorms with length * width of about 0.5-1.5mm * 2.0-3.4mm as embedding propagation bodies by using a 6-mesh nylon mesh screen after 30 days, manufacturing the artificial seeds by adopting an instillation method, preparing basic artificial endosperm from MS, 0.5 mg / L of BA, 0.5mg / L of NAA, 0.3 percent of AC, 3 percent of sodium alginate and 0.3 percent of chlorothalonil, adding 1.5 to 2.0 percent of starch, 1.0 to 2.0 percent of water-retaining agent and 1.0 to 3.0 percent of nano TiO2 into the basic artificial endosperm, preparing artificial seed coat matrix by adding 2 percent of chitosan and 5.0 to 10 percent of nano TiO2 into sodium alginate, and performing germination and storage research of the artificial seeds.

The invention discloses a root box test device used for rhizosphere microzone study. The test device comprises a root box, rhizosphere interlayers, a baffle, an inclined plate, a sampling plate and a leaky pipe, wherein the inclined plate and the baffle are arranged on the upper part of the root box; the leaky pipe is laid at the bottom of the root box; the inclined plate is arranged between the wall of the root box and the baffle and horizontally inclines at an angle of 30 degrees; a planting hole for planting crops is arranged on the inclined plate; a root-out seam is arranged on the baffle; the rhizosphere interlayers are formed by plastic plates, nylon meshes and inclined plates; the sampling plate and the rhizosphere interlayers have the same size; and the middle of the sampling plate is hollowed. The device not only can be used for studying the rhizosphere microzones of different millimeter grades around the root system and avoiding the effect of non-rhizosphere soil, but also can be used for studying the regional differentiation characteristics of different parts of the root system.

The invention discloses a submerged plant propagating and culturing device which comprises a bearing support, a buoyancy support and a substrate layer, wherein the buoyancy support is ring-shaped and is arranged on the upper end surface of the bearing support, and the substrate layer is laid on the upper end surface of the bearing support and at least comprises a non-woven fabric layer used for fixing the root system of a submerged plant and a nylon mesh layer arranged below the non-woven fabric layer. The invention also discloses a method for propagating and culturing submerged plants. Compared with the prior art, the invention has the following advantages that a special device is utilized for changing the growing environment in different water depth conditions, and an appropriate growing condition is provided to speed up growth of the submerged plants so as to improve the propagation speed. The submerged plant propagating and culturing device and the method do not have quite high requirements on water depth, the thickness of soft bottom sediment and water flow stability; and the overall cost is low, the operation is simple and convenient, and the submerged plant propagating and culturing device and the propagating and culturing method are applicable to mass propagations.

The present invention is a carrying bag such as a gym bag or backpack which includes at least a pocket formed on the outside of the bag or backpack which contains a nylon mesh or other expansion type retainer sewn into the interior of the pocket which is closed by closing means such as a zipper. When the pocket is opened, the expansion retainer means can be unfolded and a large object such as a basketball, football, or objects such as wet clothes can be placed in the expansion retainer. The object within the expansion retainer is securely retained by a drawstring with a locking retainer to be sure the expansion retainer is closed and thereafter a clip or D-ring connects the top of the expansion retainer to a portion of the gym bag or backpack so that it is securely retained to assure that the objects will not fall out and will hang off the side of the gym bag or backpack so as not to put a strain on the carrier's back.

The invention discloses an anti-broken hot melt adhesive membrane used for automobile decoration and a preparation method of the anti-broken hot melt adhesive membrane. The anti-broken hot melt adhesive membrane comprises a PVB base adhesive, a TPU adhesive layer is stuck to the outer wall on one side of the PVB base adhesive, a photochromic layer is stuck to the outer wall on the side, away fromthe PVB base adhesive, of the TPU adhesive layer, a nylon mesh cloth layer is stuck to the outer wall on the side, away from the TPU adhesive layer, of the photochromic layer, and a membrane surface layer is stuck to the outer wall on the side, away from the photochromic layer, of the nylon mesh cloth layer. The preparation method comprises the following steps of preparation of raw materials, wherein a PVB adhesive solution, an EVA adhesive solution and a TPU adhesive solution which are needed during production are mixed and stirred respectively, and then sampled and inspected respectively; preparation of coating machines, wherein the three coating machines are prepared, and adhesive storage cylinders and coating heads of the three coating machines are cleaned. By means of the anti-brokenhot melt adhesive membrane, improvement of the wear-resistant performance of the surface of the hot melt adhesive membrane is facilitated, by cooperatively arranging the nylon mesh cloth layer, improved of the adhesion effect of the surface layer of the membrane can be facilitated, the box stretching performance of the hot melt adhesive membrane is improved, and improvement of the elasticity of the hot melt adhesive membrane is facilitated.

The invention discloses a thermal transfer printing silica gel which is characterized by comprising base silica gel, crosslinking agent, color paste and silica gel modifying assistant D in a mass ratio of 10:1:1:1, wherein the base silica gel is prepared by mixing 70-85 parts by mass of dimethyl ethenyl silicon oil, 15-30 parts by mass of white carbon black and 0.01-1 part by mass of assistant B; and the crosslinking agent is prepared by mixing 70-80 parts by mass of dimethyl siloxane hybrid ring DMC, 3-10 parts by mass of methyl hydrogen-containing silicon oil and 0.05-0.2 part by mass of assistant C. The invention also discloses a preparation method of the thermal transfer printing silica gel and application of the thermal transfer printing silica gel. The thermal transfer printing silica gel can be transferred to cotton fabric, Lycra, microfibers, nylon, waterproof nylon, nylon meshes, PU (polyurethane) and true leather. The silica gel thermal transfer printing product prepared by the silica gel has the advantages of super fastness to washing, high elasticity, super softness and the like, and is simple to operate.

The invention provides a riverbed base vegetation type ecological blanket repair method. The method comprises the steps of: preparing vegetation ground substance by mixing sand and stones, raw soil, substrate sludge, water-retaining agents and water by proportion; uniformly adding aquatic plant seeds or interplanting aquatic plant branches in the vegetation ground substance; covering the vegetation ground substance by nonwoven fabric, and forming a blanket by a pressing machine and a forming machine; and covering a layer of nylon mesh outside to form the vegetation type ecological blanket. When in use, the vegetation type ecological blanket is smoothly laid at riverbed bottom, and bamboo fillers are drilled at the four corners, and the centers of the upper edge and the lower edge of the vegetation type ecological blanket to fix the vegetation type ecological blanket at the riverbed bottom. The invention solves the problems of the difficulty of aquatic plant repair at the riverbed with deeper silt, and the damage to riverbed microecosystem caused by desilting and dredging. Inner source pollution caused by the release of infectant in substrate sludge to water can be effectively restricted, and all of the used materials are environmental friendly. When in use, the vegetation type ecological blanket can be installed and laid conveniently on site, and have low cost and obvious effect.

The invention discloses a remediation agent for soil polluted by heavy metals. The remediation agent comprises the following ingredients in parts by weight: 23.5-25.5 parts of attapulgite, 1.8-2.2 parts of polyamide, 2.4-2.6 parts of sodium humate, 6.2-6.8 parts of a metal chelating agent, 1.5-2.5 parts of biochar, 13.5-15.5 parts of nano-silicon dioxide, 3.5-4.5 parts of poly ferric chloride, 3.5-4.5 parts of peat and 3.2-3.8 parts of calcium peroxide. The invention further discloses a remediation method of the remediation agent for soil polluted by heavy metals. The remediation method includes the steps of placing the remediation agent in a nylon mesh bag with 15-25 meshes, burying the nylon mesh bag in soil with the depth of from 15-35 cm, and removing the bag from the soil after absorption and exchange. The remediation agent, which is obtained from the combination of attapulgite and various functional materials, applies to the remediation of soil polluted by heavy metals, has the advantage of simple and convenient remediation method, and is suitable for industrial production; heavy metals in the soil can be eliminated permanently through absorption and exchange; the purpose of remediation of the soil polluted by heavy metals is achieved; the leaching concentration, mobility and toxicity of heavy metals in soil are reduced.

The invention discloses a device for the bionomic control of water body algae blooms and a preparation method thereof. A plant algae inhibiting unit consists of dry plant body fragments, a waterproof small-mesh gunny bag and a waterproof nylon rope; the waterproof small-mesh gunny bag is sealed by the waterproof nylon rope and is tied on a main rope; a phycomycete biological film water purification unit consists of a porous polymer light suspended filler, a phycomycete biological film, a waterproof nylon rope and a waterproof small-sized nylon mesh bag; the waterproof small-sized nylon mesh bag is tied at the bottom of the porous polymer light suspended filler; and one end of the waterproof nylon rope is tied on the top part of the porous polymer light suspended filler, while the other end is tied on the main rope. The preparation method comprises the following steps: a, collecting integral calamus plants from field, and cleaning and naturally drying the calamus plants; b, crushing the dried calamus plants obtained in the step a into fragments, and filling the fragments into the gunny bag; c, adopting the porous polymer light suspended filler; d, clipping the filler; e, performing pretreatment on the filler; and f, combining the plant algae inhibiting unit and the phycomycete biological film water purification unit. The device has the advantages of readily available raw materials, low cost, no secondary pollution and obvious effect.

A kit includes materials for making a flexible replica including a first elastomer layer conformed to a shape of nipple and areola regions of the natural breast. The replica further includes a layer of elastic nylon mesh, a second elastomer layer situated over the elastic nylon mesh for creating a seamless impression replica of the nipple and areola regions. A layer of melted wax is coated against the inner surface of the first elastomer layer, and the second elastomeric layer is tinted to a distinct color for simulating an epidermal tissue color of the natural breast. The nipple region of the wax layer and the first and second elastomeric layers are provided with a plurality of orifices. The replica also contains an embossed serial number which identifies it with its owner.

The present invention is a bag or backpack with the addition of at least one mesh pouch affixed within the bag. The at least one pouch is preferably made of mesh fabric, and includes a top opening with a top hem to contain fasteners which are placed inside of the hem. The top opening of the at least one pouch can be tightened together so that personal belongings which are placed inside of the at least one pouch will not drop out of the pouch. With the aid of the at least one interior pouch, the bag or backpack of the present invention significantly improves convenience, ease for organizing personal belongings being placed inside of the bag or backpack, and efficient use of the internal volume of the bag or backpack.

The invention discloses an anti-haze window screen based on an electrospinning technology and a preparation method thereof. The window screen is provided with a three-layer composite structure, a baselayer is a metal screen cloth, and a cyan ethyl acrylate viscous layer is compounded on the surface of the metal screen cloth in an electrostatic spray method. An intermediate layer is a nanofiber functional film directly electrospun on the surface of the metal screen cloth by electrospinning, and the nanofiber functional film is a nano-graphene / PVDF / PEO composite nanofiber film, a protective layer is compounded on the upper surface of the nanofiber functional film through a hot pressing method, and the protective layer is a nylon net. The window screen can filter outdoor air, effectively block dust and other particulate matter, and can ensure indoor and outdoor air circulation and indoor lighting. The preparation method is simple, suitable for large-scale production, and has a good application prospect.

The present invention discloses a moisture permeation and water proofing fabric, and a preparation process thereof. According to the fabric, a prime coat comprises: a polyurethane resin, butanone, toluene, water, 1,6-diisocyanatohexane and N-methylethanolamine; a first surface coating and a second surface coating comprise a polyurethane resin, butanone, toluene, water and N-methylethanolamine. The preparation process comprises: mixing 1,6-diisocyanatohexane and a main resin; mixing water and butanone to form a solvent; adding the solvent to the main resin mixing solution in at least 6 times; filtering the resulting mixed solution with a nylon net to obtain a filtered main resin solution; carrying out a deaeration treatment to form a prime coat slurry; blending a surface coating slurry with a matching solution viscosity of 3500-6000 mpas; coating the prime coat slurry on the surface of the base cloth to form the prime coat, and drying; coating the surface coating slurry on the surface of the prime coat in 2 times to form the surface coatings, and drying. In the prior art, micropores in the hydrophilic moisture permeation processing coating fabric are not uniform, and are easily expanded when contacting the water. With the present invention, the disadvantages in the prior art are solved, and the moisture permeation performance of the fabric is improved.

The invention discloses a preparation method and device for a bottom blowing type photocatalytic porous permeable brick. The preparation device for the bottom blowing type photocatalytic porous permeable brick is characterized by comprising a forming die, a breathable end cover, a porous lining board, a draw bar, a nylon mesh, an air inlet pipe and a water draining pipe. The preparation method for the bottom blowing type photocatalytic porous permeable brick comprises the following steps: (1) smashing straw into particles with the length of 1-2cm; (2) putting the straw particles into a water glass solution to be soaked for 30 minutes, then taking out, and drying; (3) soaking in tung oil for 5 minutes, and then drying; (4) uniformly mixing the straw particles, cement, river sand, water glass, chopped fiber glass filaments, a cement foaming agent and water; (5) pouring mixed slurry into the forming die, and introducing CO2 gas at the temperature of 80 DEG C for curing; (6) drying for 5-7 days; (7) carrying out heat preservation on a porous brick for 1 hour at the temperature of 150 DEG C, slowly heating to 400 DEG C, carrying out heat preservation for 5 hours, and carrying out furnace cooling; and (8) impregnating and drawing a porous permeable brick in a photocatalytic plating solution for 5 minutes and then drying, and repeating for 3-4 times, so that the photocatalytic porous permeable brick is obtained.

The invention is a kind of air processing device using supersonic wave atomized liquid nano material. The device includes an increaser, a concave cylinder, reducer, square ring type fluorescent tube, spoiling board, supersonic wave atomized air spout, nylon mesh, nano material liquid supplying box, the upper end board. The liquid nano material can acts on excellent catalyst effect irradiated by the normal visible light, sprays atomized material at the increaser after atomized by supersonic, and blended with the gas flow needed to be processed, the spoiling board disturbs gas flow to blend the gas and the nano atomized gas. The invention upgrades the process effect. There also sets material for reclaiming the nano drop.

The invention relates to an aqueous zinc ion battery and a preparation method and application thereof. A birnessite / carbon composite cathode active material is synthesized by a co-precipitation method. Metal zinc powder is used as an anode active material, and a zinc sulfate-water-urea mixed solution is used as an electrolyte. A pole piece is prepared by using a slurry method. A battery cell is prepared by a winding method. The battery is prepared by a conductive adhesive bonding method. In the method, a carbon material and the birnessite are synthesized in situ. The battery prepared by the method can suppress the dissolution of the cathode material Mn. The urea-modified electrolyte can suppress the generation of dead zinc and zinc dendrites and extend the battery cycle life. A nylon net or chinlon net cathode current collector can reduce the cost and increase the energy density of the battery. A conductive adhesive bonding bus bar can prolong the battery life. The method of the invention is suitable for pilot scale-up production. The battery of the invention can be used as an electric bicycle power battery.

The invention discloses a raft type breeding suspending cage for patinopecten yessoensis. The raft type breeding suspending cage comprises a plurality of layered plates (1) and a net jacket (2) located at the periphery of the layered plates (1), wherein every two adjacent layered plates (1) and the net jacket at the periphery of the corresponding two layered plates (1) commonly form a suspending cage layer (3). The raft type breeding suspending cage is characterized in that the layered plates (1) are hard nylon netted plates, middle netted plates (4) which are vertical to the layered plates (1) and equally divide the layered plates (1) are arranged in the suspending cage layers (3), and the net jacket is formed through weaving smooth nylon mesh wires. The breeding suspending cage has the advantages that the structure is simple, the design is ingenious, the survival ratio of patinopecten yessoensis can be increased, and the cleaning and patinopecten yessoensis loading / unloading are convenient.

The invention discloses a microorganism immobilized carrier and a preparation method thereof. The immobilized carrier is a helical tube, which is formed by superposing a stainless steel mesh and a nylon mesh and then winding same. A magnetic polyvinylalcohol thin-film layer is covered outside the stainless steel mesh and the nylon mesh. The preparation method for the microorganism immobilized carrier comprises the following steps: preparing the magnetic polyvinylalcohol thin-film layer; modifying and activating the magnetic polyvinylalcohol thin-film layer; preparing the helical tube structure; and immobilizing a microorganism. The microorganism immobilized carrier has the advantages of large surface contact area, multiple absorbed microorganisms, magnetism, simple operation, reduction of production and operation steps, reduction of cost, strong adsorbability, and strong activity and reliability of the carrier, thereby achieving the recycling aim. The occupancy space is reduced; the product yield is improved; and the mass transfer effect cannot be influenced simultaneously.

The invention relates to a soil insect collector which comprises a frame (1) and a nylon mesh enclosure (2) coated on the frame (1), wherein a large tray (5) is arranged at one side of the frame(1), the lower end of the large tray (5) is fixed by two support rods (4), and the upper end of the large tray (5) is fixed by fixed sheets (11); one end of an elbow pipe (6) penetrates through the nylon mesh enclosure (2) and the large tray (5), is in threaded connection with an interface (8) and is fixed on the large tray (5), and the other end of the elbow pipe (6) is in the threaded connection with a collecting bottle (7). The invention has simple manufacture, low cost and portability, is convenient to use, can be dismounted and folded for package so as to have small size, is portable for use in fields or required places, is convenient to mount and use and is suitable for the specimen collection of soil insects, the observational study of the biology and the ethology, and the like.

The invention discloses a method for picking desertliving cistanche seeds by utilizing a bag, which belongs to the technical field of agricultural crop culture. The method includes the following steps: the white nylon mesh bag with 80 to 100 meshes is used for covering seed-bearing desertliving cistanche inflorescences at the full-bloom stage of desertliving cistanche, the bottom of the mesh bag is tied up, the mature desertliving cistanche inflorescences covered by the mesh bag are picked along with the mesh bag after the desertliving cistanche blooms for 45 to 50 days and desertliving cistanche capsules crack and when seeds are mature, and finally, the desertliving cistanche seeds are screened and graded for later seeding. The method overcomes the production problem that the cracking ofcapsules leads to the loss of seeds to cause the decrease of yield when desertliving cistanche seeds are mature during production, and is suitable for picking desertliving cistanche seeds, and moreover, the method not only can guarantee normal ventilation and light permeation for desertliving cistanche inflorescences, but also can prevent insects, mice and other pests from harming desertliving cistanche inflorescences, thus effectively increasing the yield of desertliving cistanche seeds.

The invention discloses a method for producing chondroitin sulfate, which comprises the following steps: (1) processing cartilages; (2) adding fresh porcine pancreases to the cartilages after the processing, adjusting the pH, processing the cartilages with ultrasonic waves, and filtering the cartilages with a nylon mesh; (3) extracting the cartilages after the filtering for the second time, and combing the filtrates of the two times; (4) adding alcohol into the combined filtrate, stirring the mixture, depositing the mixture statically, and collecting the chondroitin sulfate at the bottom; (5) adding water into the chondroitin sulfate obtained by the step (4) for dissolution, adding the alcohol into the mixture, standing the mixture, and collecting the chondroitin sulfate at the bottom; and (6) adding the alcohol into the chondroitin sulfate obtained by the step (5), dehydrating the mixture, and drying the dehydrated mixture in a drier to obtain the chondroitin sulfate. The method has the advantages of thorough decomposition of the chondroitin sulfate and protein, high yield, short extraction time and the like.

The invention discloses a method for extracting a sodium heparin crude product. The method comprise the following steps:: adding alkali to fresh intestinal mucosa water, keeping temperature and discharging material, and filtering by using a nylon mesh cloth of 90-120 meshes; carrying out a secondary extraction on filter residues and combining filtering liquids in the two steps of filtering; heating the combined filtering liquids and adding fresh porcine pancreas to react for 1 to 2 hours; putting resins into the filtering liquids to elute; adding alcohol for static deposition in the filtered elution liquid; extracting the deposit and placing in a Busher funnel to vaccumize; and dewatering and drying to obtain the heparin crude product. Combining an enzymolysis method with a salt method, the invention has the advantages of low concentration of the waste liquid and easy post-treatment. Because the process adopts the two-step decomposition of the salt method and the enzymolysis method, the sodium heparin dissociates completely with higher yield.

The invention discloses water rescue equipment. The water rescue equipment comprises a quadcopter, a stepping motor fixedly connected with the lower end of the quadcopter and with an output shaft horizontally arranged, a U-type support fixedly connected with the output shaft of the motor, a nylon net connected to the U-type support, and rear drive water wheels which are fixedly connected to the outer sides of two end portions of the U-type support correspondingly and perpendicular to the U-type support in two pushing directions; a camera is installed at the lower end of the quadcopter or the middle of the U-type support; and idler wheels are rotationally connected to the positions, at least close to the two end portions, of the U-type support. The quadcopter carries the U-type support with the nylon net to rapidly reach the rescue site in a flying mode, and maneuverability is high; and especially when a drowner sinks into the water, the rescue equipment can submerge into the water to fish up the drowner and convey the drowner to the shoreside in time, and timely rescue by a later rescue worker is facilitated.

A cap supported telephone holder disclosed herein which includes an elongated body made of flexible material designed to receive a longitudinally aligned standard size cordless or cellular telephone handset. The holder includes interconnecting hook and loop connector pads disposed between the proximal end of the body and the elastic band on the cap, and an adjustable front strap attached at one end to the distal end of the body and at the opposite end to the brim of the cap. During use, the telephone is disposed in a natural, diagonal position over the ear and near and adjacent to the user's mouth. In the preferred embodiment, the distal end of the body is closed and is made of nylon mesh material. The front strap is an inverted Y-shaped strap with the two lower legs being spaced apart and attached to the pocket and the upper leg being attached to the brim of the cap. The upper leg of the front strap may be selectively attached to one of a plurality of holes formed in the brim of the cap so that the telephone mouthpiece may be properly positioned near the user's mouth.

The invention discloses an ecological method for in-situ passivating soil heavy mental without additional exterior component . The ecological method comprises the following steps: stirring and filtering a soil sample and a NaCl saturated solution in an ultrasonic-wave environment to obtain a pre-treated soil sample; transferring the soil sample into a settling container, repeatedly extracting the soil sample with water to obtain a soil clay-particle-level organic and inorganic composite; and realizing in-situ passivating repair of Pb / Cd combined pollution by the soil clay-particle-level organic and inorganic composite by adopting a nylon mesh bag method. The method is obvious in passivating effect, low in cost, simple and convenient in operation, good in ecological safety, small in environmental disturbance, high in practicability, and capable of conserving a soil ecological function while carrying out passivating repair of Pb / Cd combined pollution, and has a potential popularization and application value.

The invention discloses a separation and measurement device for vertical infiltration quantity and horizontal migration quantity of water contained in a litter layer after rainfall is intercepted by the litter layer. The device comprises a steel ring, a drum, a funnel, a water collection tank and electronic analytical balances, wherein the steel ring is nested in the drums, and a nylon mesh is paved at the bottom of the drum for holding litter; the funnel is located inside the drum and below the steel ring, is connected to the flow collection tank through a round tube, and is used for transferring vertical infiltration water in the litter layer to the water collection tank; the water collection tank is located outside the drum, and used for receiving water transferred from the funnel; and the electronic analytical balances are respectively located at the lower parts of the drum and the water collection tank, and used for measuring the vertical infiltration quantity and the horizontal migration quantity of water in the litter layer. The device provided by the invention can separate and measure the vertical infiltration quantity and the horizontal migration quantity of water in the litter layer under the condition of natural rainfall or artificial rainfall, so as to achieve quantitative research on water movement in the litter layer.

The invention discloses a combined ecological floating bed for water quality improvement of a heavily contaminated water body. The combined ecological floating bed is composed of a floating bed body and a hanging body hung below the floating bed body, wherein the floating bed body is composed of a rectangular floating bed frame and a supporting screen, the rectangular floating bed frame is composed of PVC pipes and connecting members and separated into thee rectangular units, the supporting screen is fixed on each rectangular unit and may be a nylon mesh, a plastic mesh or a fibrous mesh, gramineous plants or floating plants are planted on the supporting screen, the hanging body is a rectangular box with upper opening, the rectangular box is filled with a plantation matrix, submerged plants are planted on the plantation matrix, and the plantation matrix is prepared from clay, Chinese medicine residue and vermiculite according to a certain weight ratio. Through reasonable collocation and plantation of water plants, the heavily contaminated water body is maximally purified, the population of submerged plants is effectively recovered, and transparency of the water body is improved.

The invention discloses a method for determining available trace elements in soil. The method comprises the following steps: (1) picking out the animal and plant residues, stone and the like after air drying the soil sample, pouring the sample into a clean wooden tray, and porphyrizing the sample by a stick to make the sample all pass the 2mm nylon mesh; (2) weighing a certain amount of soil sample to place in a conical flask with cover, adding a certain amount of extracting agent, stirring the mixture, and performing graded ultrasonic extraction for 5-30 min; and (3) filtering or centrifugating the content in the conical flask, taking the supernatant to determine the content of available iron, manganese, copper, and zinc by using inductively coupled plasma mass spectrometry. The method is based on the supersonic wave having rapid and high-efficiency extraction technology, combines the characteristics of the inductively coupled plasma mass spectrometry such as high sensitivity, wide linearity range, and multielement simultaneous determination, and has very important meaning of researching available trace elements in agricultural soil. The invention invents the method for analyzing available trace elements in soil efficiently and rapidly.