146 results about "Water retention (function)" patented technology

The invention discloses a preparation method of an intelligent response type soil conditioner based on a nano composite material, and belongs to the technical field of soil improvement. The modifier is prepared from 10 to 15 parts of modified chitosan, 15 to 25 parts of nano silicon dioxide, 20 to 30 parts of biochar-loaded polyglutamic acid, 8 to 15 parts of humic acid-sodium alginate microcapsules, 3 to 5 parts of trace element slow-release particles, 1 to 2 parts of a pH response type cross-linking agent and 15 to 25 parts of a functional agent. The soil conditioner researched and developed by the invention can flexibly adapt to complex and changeable soil environments, can sensitively sense dynamic changes of key environmental indexes such as soil humidity, pH value and temperature, automatically and accurately regulates and controls the release rate and the action effect of the soil conditioner, realizes multiple functions such as water retention, acid regulation, fertility increase and pollution resistance in a one-stop manner, and has a wide application prospect. High efficiency, long-term effect and ecological environment friendliness of soil improvement are comprehensively achieved, a new road is opened up for global soil improvement, and agricultural yield increase, ecological restoration and urban green development are assisted.

The invention relates to the technical field of land treatment, in particular to an organic fertilizer for improving the soil fertility of a sand land. Comprising the following raw materials in parts by weight: 3-12 parts of a microbial agent, 20-50 parts of volcanic rock, 5-12 parts of an additive, 32-45 parts of sodium bentonite, 12-18 parts of a functional agent, 5-25 parts of a modifier and 15-32 parts of a water retention material. By increasing organic matters in the soil, the viscosity of the soil is improved, the air permeability, water retention and permeability of the soil are improved, the formation of a soil aggregate structure is promoted, and the water and fertilizer retention capability of the sand soil is improved.

The invention discloses a high-toughness wetland ecological grid structure and a restoration system thereof. The grid structure comprises a plurality of rows of slope fixing grids which extend longitudinally and are arranged at intervals, and the slope fixing grids in the adjacent rows are arranged in a staggered mode; interval zones between the adjacent slope fixing grids form planting base bands which are communicated with each other. The slope fixing grids and the planting base band are made of artificial substrates of a multi-level pore structure, and a plurality of longitudinally-extending artificial waterways are arranged in the planting base band. The staggered ecological grid structure is matched with the wave-shaped artificial waterway to enhance the overall stability and anti-interference capability of the wetland, and the artificial matrix with the multi-level pore structure improves the water retention, filtration and adsorption effects and enhances the hydraulic connectivity of the matrix. According to the remediation system, a grid structure is divided into four planting belts, the remediation system of an arbor-shrub-grass-hygrophilous four-layer three-dimensional community is formed, a functional microorganism-plant combined remediation mechanism is achieved in cooperation with microbial flora, and the remediation adjusting capacity and stability of the wetland are improved.

The invention provides tillage and soil preparation equipment and method for improving the water utilization efficiency, and relates to the technical field of strip tillage and agricultural machinery, in particular to the tillage and soil preparation equipment and method for improving the water utilization efficiency. Therefore, the water utilization efficiency of soil and the yield and quality of crops are remarkably improved, the power consumption of tillage and soil preparation equipment can be reduced, the strip tillage quality and the strip tillage efficiency are improved, and the maintenance cost of machinery is indirectly reduced; the tillage and soil preparation equipment can achieve the integrated functions of straw returning, soil preparation, fertilization, pressing, drip irrigation belt laying, mulching film laying and the like, the tillage depth can be adjusted according to the actual situation, the number of the auxiliary racks can be selected according to the area of a field during tillage, the width can be adjusted by adjusting the width of the strip tillage wheel and the width of the pressing wheel, and the tillage and soil preparation efficiency is improved. And a wide-narrow row farming mode is realized by adjusting the distance between the auxiliary racks according to actual conditions.

The invention belongs to the technical field of soil improvement, and relates to a soil conditioner for improving sandy soil structure and a preparation method thereof, and the preparation method specifically comprises the following steps: preparing activated humic acid, preparing a nano mineral material, preparing modified biochar, constructing biochar composite gel, and preparing konjac glucomannan-sodium alginate water-retaining colloid. Mixing the biochar composite gel, the water-retaining colloid and the slow-release fertilizer, granulating and the like. Through a ternary synergistic system of the biochar composite gel, the water-retaining colloid and the slow-release fertilizer, the functional singleness is broken through, the structure-water retention-fertilizer supply integration is realized, and the problems that an existing sandy soil conditioner is single in function, poor in component synergism, weak in environmental adaptability, insufficient in long-term effect and the like are solved.

The invention relates to the technical field of soil improvement, in particular to a soil conditioner for promoting flue-cured tobacco root development and a preparation method thereof, and the soil conditioner is mainly composed of struvite modified biochar, a microbial agent, a microbial protective agent, a carboxyl functionalized polyacrylamide solution and the like. The preparation method comprises the following steps: preparing struvite modified biochar through oxygen-controlled cracking, citric acid activation and chemical reaction, combining the struvite modified biochar with a microbial agent, loading the struvite modified biochar on the surface of the biochar, then mixing the microbial-loaded biochar with a carboxyl-functionalized polyacrylamide solution, adding chitosan, wormcast, humic acid, sodium alginate and plant ash, and granulating and drying to obtain the modifier. The modifier prepared by the invention can significantly improve the physical and chemical properties of soil, provide long-acting nitrogen and phosphorus sources, enhance the water retention capacity of soil, and promote the healthy development of flue-cured tobacco roots.

The invention relates to the technical field of fertilizer preparation, in particular to a farmland drought-resisting and water-retaining multifunctional green fertilizer and a preparation method thereof. The farmland drought-resisting and water-retaining multifunctional green fertilizer is prepared from the following components in parts by mass: 40-60 parts of mushroom dregs, 10-20 parts of konjac glucomannan residues, 3-5 parts of a water-retaining agent, 11-15 parts of an NPK compound fertilizer, 4-6 parts of trace elements, 0.4-0.6 part of a fermentation inoculant, 1-2 parts of wormcast, 1-2 parts of humic acid and 0.6-0.8 part of a seaweed extract. The prepared fertilizer can significantly improve the physical structure of soil, enhance the water retention capacity of the soil, promote the growth and development of crop roots, and further improve the drought resistance of crops. In addition, the application of the fertilizer is helpful for reducing the use amount of chemical fertilizers, so that the sustainable development of ecological agriculture is promoted.

The invention relates to the field of soil remediation conditioners, and particularly provides a soil remediation conditioner for durian breeding as well as preparation and application of the soil remediation conditioner. The soil remediation conditioner is prepared from the following components in parts by weight: 35 to 45 parts of organic matter fertilizer, 18 to 22 parts of biochar, 22 to 28 parts of humic acid, 8 to 12 parts of vermiculite, 10 to 14 parts of perlite, 12 to 18 parts of shell powder, 6 to 10 parts of mycorrhizal fungi, EM bacteria and other mixed bacteria, 8 to 12 parts of wormcast, 4 to 6 parts of amino acid chelate solution, 8 to 12 parts of coco coir and 4 to 6 parts of adhesive. The specific surface area of the biochar is 32 m < 2 > / g, and the particle size is 40 meshes; the soil remediation conditioner is applied to durian planting soil remediation, has the effects of improving the physical structure of soil, improving the air permeability and water retention of the soil, increasing the fertility of the soil and providing rich nutrition for breeding and growth of durian seedlings, and has great application potential for the durian industry.

The invention discloses an efficient maintenance method for a cement stabilized macadam base, and relates to the technical field of buildings. According to the efficient maintenance method for the cement stabilized macadam base, the water-retaining property of the covering device is guaranteed through the geotechnical cloth water-retaining layer, so that the covering object is better kept wet in the maintenance process; the cement stabilized macadam base is well prevented from being influenced by water shortage during maintenance due to the toughness and the water conveying capacity of the polyethylene water distribution pipe; the reserved connecting port of the water distribution pipe has the effects of connecting a water supply pipe and connecting a plurality of covering device units, sufficient water maintenance of a cement stabilized macadam base layer in a covering area is guaranteed as far as possible, and meanwhile, the performance of convenient disassembly and assembly provides the effects of being suitable for maintenance of areas with any area and recycling of the device during maintenance of the cement stabilized macadam. Due to the water sealing performance of the polyethylene water sealing layer and the water supplementing holes formed in the water distribution pipe, only a small amount of water in the cement stabilized macadam base is evaporated.

The invention relates to the technical field of soil improvement, and discloses a preparation method of an intelligent controlled-release fertilizer using water to drive an iron switch. The slow / controlled-release fertilizer is of a core-shell structure, the core of the slow / controlled-release fertilizer is a porous carrier loaded with nutrient elements, and the core shell of the slow / controlled-release fertilizer is an iron mineral film layer. According to the slow / controlled-release fertilizer provided by the invention, the nutrient elements are loaded on the porous carrier, then the carrier is coated with the iron mineral film layer, and the slow / controlled-release fertilizer can be combined with soil moisture conditions to induce soil microorganisms to change the pore size of the iron mineral film layer on the surface of a material, so that the release rate of the nutrient elements is regulated and controlled, and the efficient utilization of the nutrient elements is promoted; meanwhile, the porous carrier has the effects of keeping soil moisture and increasing soil pores, so that the sustained and controlled release fertilizer can also optimize the soil structure and enhance the air permeability and water retention of the soil; the slow / controlled-release fertilizer has the advantages of easily available raw materials, low cost, environmental friendliness, simple preparation method, low energy consumption and no generation of solid waste, and is suitable for popularization and application.

The invention discloses an opencast coal mine truck transportation road dust suppressant for a high-temperature dry environment and a preparation method of the opencast coal mine truck transportation road dust suppressant. The dust suppressant is prepared by mixing 20-30% by mass of glucose, 0.05-0.15% by mass of a penetrant, 1.5-2.5% by mass of a water-retaining agent, 1.5-2.5% by mass of a moisture absorbent and the balance of water. The dust suppressant is an environment-friendly material, the main material glucose is a monosaccharide which is most widely distributed and most important in nature, and the dust suppressant has the characteristics of being non-toxic, odorless, green, environment-friendly, wide in source and application and the like. The dust suppressant integrates the functions of wetting, moisture absorption, water retention and the like, can keep dust on a road surface transported by a large mine truck of an open pit coal mine wet and effectively suppress flying dust on the road surface, is simple in preparation process, low in material cost, green and environment-friendly in material and wide in material source, and has good flowability and feasibility. The dust suppressant is applied to the open pit coal mine end slope transportation road, the environment quality and the traffic safety of the open pit coal mine can be effectively guaranteed, and the manpower and material resource investment of environment maintenance is reduced.

The invention provides a construction concrete curing process, which relates to the technical field of building construction, and comprises the following steps: carrying out surface film forming treatment at the initial setting stage of concrete; laying a composite maintenance layer with water retention and reflection functions; the concrete humidity is monitored through an embedded humidity sensor, and humidity data is obtained; controlling a local water supplementing system to operate according to the humidity data; and dynamic temperature regulation is implemented in combination with the environment temperature. Pores in the surface of the concrete are sealed by the water-retaining film layer, so that the problem of early cracking caused by rapid evaporation of water is solved; water is evenly distributed through the composite maintenance layer, local dry-wet difference is eliminated, solar radiation is reflected, the surface temperature is lowered, and temperature stress cracks are reduced. The concrete humidity is monitored through the humidity sensor, water is supplemented according to needs, compared with regular spraying, the use amount of water resources is reduced, and the water saving effect is achieved; and the contradiction that the strength is reduced due to excessive water replenishing or shrinkage is caused due to insufficient water replenishing in traditional curing is also solved.

The application provides a construction concrete curing process and relates to the technical field of building construction, which comprises the following steps: surface film forming treatment is performed in the initial setting stage of the concrete; a composite curing layer with water retention and reflection functions is laid; the humidity of the concrete is monitored through a buried humidity sensor to obtain humidity data; a local water supplement system is controlled to operate according to the humidity data; and dynamic temperature regulation is implemented in combination with the ambient temperature. The water retention film layer seals the surface pores of the concrete, solving the early cracking caused by the rapid evaporation of water. The composite curing layer uniformly distributes water, eliminates the local dry-wet difference, reflects solar radiation, reduces the surface temperature and reduces the temperature stress cracks. The humidity of the concrete is monitored through the humidity sensor, and water is supplemented as needed, which reduces the water resource consumption compared with the timed spraying, achieves the water saving effect, and also solves the contradiction between the strength reduction caused by the excessive water supplement and the shrinkage caused by the insufficient water supplement in the traditional curing.

The invention discloses a bioretention facility dielectric layer suitable for northwest regions and a preparation method, and relates to the technical field of environmental governance. The invention discloses a bioretention facility dielectric layer suitable for northwest regions and a preparation method thereof. The preparation method comprises the following steps: preparing biochar, selecting experimental biochar types, preparing modified biochar, selecting a biochar filling proportion, selecting a biochar filling mode, strengthening the dielectric layer and removing microorganisms. According to the invention, a bioretention facility medium layer suitable for northwest regions is designed, that is, a layered functional medium design is adopted, and a layer of strengthening medium is added on a basic medium, so that low-intervention and high-benefit collaborative purification is realized; special agricultural organic wastes in northwest regions are utilized to prepare biochar, and then the biochar is used for a medium layer of a bioretention facility; the bioretention facility medium layer has the advantages of comprehensive design functions including water retention, drainage and decontamination (nitrogen, phosphorus and microorganisms).

The invention discloses a water-absorbing material for soil water retention and fertilizer self-supply as well as a preparation method and application thereof, and relates to the technical field of soil water retention functional materials and preparation thereof. The water absorbing material is particulate matters with a graded micro-nano structure prepared by reacting natural agricultural and forestry wastes, animal wastes, acrylic acid or derivatives thereof, an initiator, a cross-linking agent and inorganic minerals; the mass ratio of the natural agricultural and forestry waste to the animal waste to the acrylic acid or the derivative thereof to the initiator to the cross-linking agent to the inorganic mineral is 100: (10-300): (500-6000): (5-100): (2-50): (10-200). The water absorbing material not only can be degraded under ultraviolet light, but also has high water absorption rate, can maintain water absorption performance after circulating freezing and thawing treatment, and spontaneously provides nutrients for soil.

A submerged water feeding pump with a water retention function comprises a motor, a base, a pump outer pipe, an inner pipe, a guide vane, a pump shaft, an impeller and a guide bearing, a sealing shaft sleeve and a valve clack are respectively sleeved on the pump shaft and above the impeller from bottom to top, the sealing shaft sleeve is axially and fixedly mounted on the pump shaft, and the valve clack is not in contact with the pump shaft and can axially move along the pump shaft. A first sealing face capable of being in contact with each other is arranged between the sealing shaft sleeve and the valve clack, a second sealing face capable of being in contact with each other is arranged between the valve clack and the guide vane, when the valve clack is reversely pressed, the first sealing face and the second sealing face are both in a sealing state, the first sealing face or the second sealing face is in elastic sealing, and valve closing is achieved. When the valve clack is pressed in the forward direction, the first sealing face and the second sealing face are both in an open state, and valve opening is achieved. Therefore, the pump cavity of the water feeding pump can be kept full of water during shutdown, and the water feeding pump and the main drainage pump connected with the water feeding pump can be started at the same time during restarting, so that the purpose of quick starting is achieved.

The invention discloses a preparation method of a water-retention expanded compound organic fertilizer, and relates to a preparation method of a compound organic fertilizer. The invention aims to solve the problem that the existing organic fertilizer has poor water retention or water storage capacity after improving soil. The preparation method comprises the following steps: carrying out hydrophobic treatment on attapulgite and humic acid, carrying out functional modification on the attapulgite by utilizing active functional groups such as carboxyl and phenolic hydroxyl of the humic acid, and compounding with an acrylic acid-acrylamide copolymer, a modified expanding agent, the humic acid, mushroom bran and the attapulgite to form the water-retaining expanded composite organic fertilizer. The surface of calcium carbide in the modified expanding agent is provided with a coating layer formed by xanthan gum, and after the modified expanding agent is applied to soil, the gel generates volume expansion, so that the water storage space is increased, and the water storage capacity is further improved. Due to the use of the expanding agent, the use amount of the acrylic acid acrylamide copolymer is remarkably reduced, the cost is remarkably reduced, and the expanding agent has relatively good practicability and can be popularized.

The application provides an in-situ liquid gel-forming water-retaining agent and a preparation method and application thereof. The water-retaining agent is composed of A component and B component which are applied in steps. The A component contains an aqueous solution of a natural modified polymer, and the natural modified polymer is selected from one or two of carboxymethyl chitosan, carboxymethyl cellulose or a sodium salt thereof. The B component contains an aqueous solution of a cationic crosslinking agent, and the cationic crosslinking agent is selected from one or more cations of copper nitrate, iron nitrate, zinc nitrate, manganese nitrate, chitosan quaternary ammonium salt, calcium nitrate and magnesium nitrate. The water-retaining agent can realize the integrated functions of slow release of trace elements, water retention, soil improvement and precise nutrition supply. Furthermore, the water-retaining agent is applied to crop growth in combination with the "step-by-step drip irrigation and in-situ gel formation" technology, so that the agronomic characters of crops can be significantly improved.

The invention discloses an ecological slope protection method based on concrete hexagonal blocks, which realizes the double targets of slope stability and ecological restoration through a five-in-one technical system of grouted rubble footing, original soil compaction, nutritional non-woven fabric laying, concrete hexagonal block construction and a vegetation restoration system. And quality control and acceptance: regularly checking footing settlement, non-woven fabric lap joint, hexagonal block flatness and the like, monitoring the vegetation recovery effect by aerial photography of an unmanned aerial vehicle, detecting the structural stability, evaluating the vegetation coverage rate and the like. According to the method, standard hexagonal block prefabricated parts are spliced to form a grid framework, nutrient soil is filled in the grid framework, turf or aquatic plants are planted in the grid framework, a double-reinforcing structure of a grouted rubble coping and footings is matched, water and soil loss is effectively prevented, nutritional non-woven fabric is innovatively adopted as an ecological transition layer, the functions of water retention, fertilizer retention and scouring prevention are achieved, and the ecological effect is good. The in-situ soil compaction technology is matched to improve the bearing capacity of the base, the vegetation survival rate is high, and the method is suitable for various slope treatment projects such as rivers, reservoirs and roads.

The utility model belongs to the technical field of subway construction, and particularly provides a multifunctional supporting device based on a subway tunnel section, which comprises a supporting plate and a supporting frame, the supporting plate is fixedly connected with the top of a tunnel through the supporting frame, a plurality of through holes are formed in the supporting plate at intervals, and hollow connecting rods are mounted in the through holes. A plurality of water inlet holes communicated with the interior of the connecting rod are formed in the side wall, close to the top end, of the connecting rod at intervals, and a water outlet hole is formed in the bottom end of the connecting rod; the tunnel further comprises a plurality of flexible flow guide pipes, the flexible flow guide pipes correspond to the connecting rods one to one, the flexible flow guide pipes are fixedly installed on the supporting frame, one ends of the flexible flow guide pipes communicate with the water outlet holes, and the other ends of the flexible flow guide pipes communicate with a drainage system in the tunnel. According to the utility model, the tunnel section can be effectively supported, the construction safety is ensured, through the arrangement of the through holes, the connecting rods and the flexible flow guide pipes, seepage water in a soil layer can be guided into a drainage system, accumulated water retention is avoided, the water leakage phenomenon is effectively reduced, and meanwhile, the reliability of a waterproof system can be improved.

The present application relates to a kind of water-repellent breathable carbon mineralization protective coating and its preparation method and application, by mass parts, including the following components: γ-dicalcium silicate powder: 3~6 parts;Carbonization template: 0.3~0.9 parts;Crystal form regulator: 0.8~1.8 parts;Surface hydrophobic modifier: 0.01~0.1 parts;Water-retention and pore control agent: 2~5 parts.The present application water-repellent breathable carbon mineralization protective coating is based on the carbonization reaction of γ-dicalcium silicate, induces aragonite crystal form growth by crystal form regulator, gives coating surface hydrophobicity by surface hydrophobic modifier, improves pore and water retention by water-retention and pore control agent, can realize the function of water (liquid) blocking not gas (vapor) blocking, give consideration to water-repellent and breathability, effectively avoid the problem that coating is bubbled and falls off due to internal steam pressure is too large, especially suitable for coastal splash zone and tidal zone concrete protection.

The invention discloses a modified diatomite composite material with water retention and heavy metal immobilization functions and application thereof, and relates to the technical field of diatomite composite materials. S2, modifying diatomite; s3, performing crosslinking modification on the diatomite by using acrylamide. The prepared modified water-absorbing diatomite material can form aggregates with soil particles, and the hardening effect of the whole soil is reduced. The adsorbent has a good adsorption effect on V (V) and Cr (VI) in a solution, and can convert acid extractable heavy metals which are more easily utilized by plants into iron and manganese oxide combined states in a soil environment, so that the content of the heavy metals in the plants is reduced.

The application discloses a preparation method of drought-resistant polyglycoside synergistic fertilizer, and belongs to the technical field of agricultural fertilizer.The gamma-polyglutamic acid from microbial fermentation and the iridoid glycosides from plant extraction are chemically bonded at the molecular level by two-stage gradient induction self-assembly technology to prepare polyglycoside compounds with a three-dimensional network structure, and then the polyglycoside compounds are compounded with fertilizer base materials and granulated by a high tower melting to obtain the drought-resistant polyglycoside synergistic fertilizer.The polyglycoside compounds prepared by the application form a stable three-dimensional network structure through ester bonds and hydrogen bonds, have physical water retention and biological induction dual functions, and the water retention rate in soil is increased by 30%-50% compared with common fertilizer, the corn yield is increased by 20%-30%, and the fertilizer utilization rate can be increased by 18.8%, so that the drought-resistant synergistic effect is remarkable and the industrial application value is high.

The garden nursery stock transfer equipment with the water retention function comprises a vehicle body, movable wheels are installed at the bottom of the vehicle body, a loading block is fixedly installed in the middle of the upper end of the vehicle body, a containing groove is formed in the loading block, and a side plate is fixedly installed on the side edge of the upper end of the loading block; a center lead screw is installed in the middle of the side plate, two limiting plates are installed on the center lead screw, a cam is fixedly installed on a rotating shaft in the middle of the movable wheel, a water supplementing structure is arranged on the side edge of the cam and communicates with a flow dividing groove in the loading block, and water spraying holes are formed in the flow dividing groove. According to the garden nursery stock transfer equipment with the water retention function, branches and trunks of nursery stocks can be conveniently limited and fixed when the nursery stocks are transferred, and meanwhile when nursery stock rootstock soil is lack of water, water can be sprayed for moisturizing, and the rootstocks are prevented from being death due to dehydration.

The invention relates to a simple calculation method for determining a soil-water characteristic curve by a two-point method, which comprises the following steps: acquiring a soil sample to be detected, the soil sample to be detected comprising coarse-grained soil and fine-grained soil; a particle size grading curve is determined, the coarse-grained soil is determined through a screening experiment, and the fine-grained soil is determined through a laser particle size analyzer; determining particle size shape distribution parameters, wherein the particle size shape distribution parameters are obtained through fitting calculation of at least one particle size distribution function; determining a soil-water characteristic curve function, wherein the soil-water characteristic curve function is obtained through calculation by combining the at least one particle size distribution function with a correction function; and obtaining two water holding points and determining a soil-water characteristic curve model, wherein the two water holding points are used for determining parameters of the soil-water characteristic curve function.

The invention belongs to the technical field of agriculture and forestry water-retaining materials, and particularly relates to a slow-release ecological agriculture and forestry water-retaining agent for desert control and a preparation method thereof. The water-retaining agent comprises the following components: 40-65 wt% of acrylic acid grafted modified starch; 15-25 wt% of a nano-scale inorganic porous carrier; 10 to 20 weight percent of humic acid coated sustained-release microcapsules; 3-8 wt% of a cross-linking agent; and 0.5-2 wt% of a functional auxiliary agent. Through material compounding and structure innovation, the problems that a traditional water-retaining agent is high in pollution performance, single in function, poor in saline-alkali adaptability and the like are solved, and the water-retaining agent has the advantages of efficient water retention, intelligent slow release, environmental restoration and low cost, is particularly suitable for agriculture and forestry planting and ecological management in arid areas, saline-alkali soil and ecologically fragile areas, and has wide application prospects. The method has remarkable technical advancement and market application potential; the method not only can be used for desert and desertification control, but also can be used for ecological agricultural planting, urban garden management and protection, and forest tending and afforestation.

The invention discloses melatonin-chitosan-attapulgite composite gel beads and a preparation method thereof. The preparation method comprises the following steps: S1, treating attapulgite with organic acid to obtain activated attapulgite; s2, dispersing the activated attapulgite into the chitosan acid sol; s3, adding melatonin into the dispersed sol, and mixing in a dark place to obtain colloid; and S4, dropwise adding the colloid into a cross-linking agent, and standing to form gel beads. According to the melatonin-chitosan-attapulgite composite gel bead, the melatonin-chitosan-attapulgite composite gel bead is constructed, the water retention performance of the composite gel bead is excellent, chitosan and attapulgite synergistically improve the water absorption and holding capacity, soil moisture loss is reduced, the water saving effect is remarkable, and the melatonin-chitosan-attapulgite composite gel bead is suitable for agricultural production in water-deficient areas. The composite carrier can slowly release melatonin, prolong the action period of melatonin, regulate and control crop physiology, enhance stress resistance and achieve the dual effects of moisture guarantee and stress resistance regulation and control.

The utility model belongs to the technical field of faucets, and particularly relates to an anti-freezing faucet with an automatic drainage function, which comprises a water supply pipeline, the water supply pipeline is connected with a central pipe, an elastic pipe is sleeved outside the central pipe, and an outer pipeline is sleeved outside the elastic pipe; the central pipe comprises a connecting pipe, an adapting pipe and a water passing pipe, the connecting pipe is in threaded connection with the water supply pipeline, and a water passing hole is formed in the upper end of the adapting pipe; the elastic pipe comprises an upper pipe part and a lower pipe part, the upper pipe part is movably sleeved outside the central pipe above the water passing hole, the lower pipe part is fixedly sleeved outside the adapting pipe below the water passing hole, a gap exists between the upper pipe part and the outer pipeline, and a sealing ring is arranged between the upper pipe part and the outer pipeline. The gap between the elastic pipe and the central pipe is opened through water flow impact so that water flow can pass through, residual water flow is automatically discharged through radial contraction of the elastic pipe after the faucet is closed, and the problem that the faucet is frozen in a cold environment due to water retention in the faucet is effectively solved.

The invention discloses a porous functional ceramic material with high plasticity as well as a preparation method and application thereof, and belongs to the technical field of ceramic preparation, the ceramic material is prepared by treating and firing ceramic slurry, and the ceramic slurry comprises the following components in parts by mass: 1-10 parts of a binder and 1-10 parts of a binder. Comprising the following components in parts by weight: 2090 to 2190 parts of red pottery clay, 1100 to 1200 parts of feldspar powder, 2580 to 2680 parts of kaolin, 1000 to 1100 parts of white sandy soil, 1300 to 1400 parts of flower soil, 540 to 640 parts of red pottery clay, 10 to 15 parts of manganese dioxide, 100 to 140 parts of plasticizer and 3600 to 4000 parts of water. The modified bentonite is used as a plasticizer of the ceramic, the surface layer of the bentonite is modified with a water-absorbing organic polymer structure, so that the water retention capacity of the bentonite is enhanced, non-uniform shrinkage of a green body caused by too fast water evaporation of the bentonite is prevented, and the hydroxyl and carboxyl structures on the surface can enhance the combination between soil bodies and can effectively prevent cracking; the organic polymer structure releases certain gas in the calcining process to obtain ceramic with a porous structure; organic molecular structures with different thermal stability are adopted to modify the surface of bentonite, so that gas is slowly released, and the ceramic material with uniform pores is obtained.

The invention relates to the field of soil improvement agents, in particular to a potamogeton crispus-based soil improvement composition and a preparation method thereof. The potamogeton crispus-based soil improvement composition comprises the following raw materials: a potamogeton crispus treatment composition, a composite functional material, a water retention and nutrient slow release agent, a passivating agent and the like. According to the method, the potamogeton crispus is effectively pretreated and converted, on the basis of simplifying existing treatment steps, the application effect of the potamogeton crispus in the soil improvement composition is greatly improved, the actual improvement effect of the potamogeton crispus-based soil improvement composition can be effectively improved through formula combination, and the phenomena of corrosion and phase separation during storage are avoided; therefore, cyclic utilization of aquatic plant waste is achieved, the existing environmental protection requirement is met, and meanwhile a good comprehensive application function is provided.