51 results about "Loam" patented technology

The invention provides a method suitable for water retention of soil with different textures. In order to better perform size matching between the biochar and soil particles, particle size grading is performed on the biochar according to the size of soil aggregates, and three kinds of biochar with the particle size larger than 2.0 mm, the particle size ranging from 0.25 mm to 2.0 mm and the particle size smaller than 0.25 mm are obtained. The three kinds of biochar with different particle sizes are used in different types of soil respectively, and 5% of biochar with the particle size of 0.25-2.0 mm is selectively applied according to the water retention requirement of the arid area loam farmland; according to the drainage requirements of loam waterlogging areas with more rainfall, 5% of biochar with the particle size larger than 2.0 mm is selectively applied; and 5% of biochar with the particle size smaller than 0.25 mm is selectively applied for water and soil conservation of sandy soil in the arid region. By scientifically regulating and controlling the particle size and the application amount of the biochar, the biochar is matched with the specific properties of the soil, so that the water retention capacity of the soil is improved, and the soil efficiency is improved.

An ecological combined constructed wetland system for rare earth mine tail water treatment is characterized in that a downward vertical flow wetland and an upward vertical flow wetland of a three-stage combined wetland system are communicated through a bottom communicating pipe, and the upward vertical flow wetland and a floating island wetland are communicated through an upper overflow weir; the tail water treated by the sewage adjusting tank sequentially flows through the downward vertical flow wetland, the upward vertical flow wetland and the floating island wetland; each of the downward vertical flow wetland and the upward vertical flow wetland comprises a filler layer with a three-layer structure, and the upper layer is a plant substrate layer and is composed of fine sand or sandy loam; the middle layer is a functional material layer and is composed of hematite, zeolite or activated carbon; the lower layer is a supporting layer and is composed of coarse sand or gravel; and the aquatic plants of the floating island wetland adsorb pollutants in the water body through root systems, and decompose residual pollutants by utilizing the metabolism of the plants. The tail water treatment device can efficiently remove particular pollutants such as ammonia nitrogen, nitrate nitrogen, heavy metals and rare earth elements in the tail water of the rare earth mine.

The invention discloses a construction method for forming a modified aggregate based on wood vinegar and charcoal mixing, and belongs to the technical field of carbon sequestration and agricultural soil carbon sequestration. The method mainly comprises the following steps: mixing biochar, organic acid and mineral powder in proportion, adding water, granulating by using a stirrer to form an initial aggregate, stabilizing the initial aggregate through an aging maintenance process, and finally applying the obtained high-stability aggregate to a soil layer. The core of the method is that large-particle, porous and stable aggregates are artificially prefabricated, so that the physical and chemical stability of the biochar in the soil is greatly enhanced, and the decomposition and migration of the biochar are effectively inhibited. According to the method, long-term and efficient storage of atmospheric carbon dioxide is achieved, the granular structure and fertility of the sandy loam soil can be remarkably improved, and the method has the double benefits of soil carbon sequestration and water and fertilizer retention improvement.

The invention relates to a natural building material panel consisting of individual blanks made of clay and loam, which are arranged seamlessly and offset and are connected by force. Since the individual components (blanks) are already dry, the panel production process is not subject to drying shrinkage, and the final panel can be as large as an entire wall. The overlaps and the fully bonded paper reinforcements on the top and bottom surfaces, as well as between the layers, provide sufficient reinforcement to withstand flexural loads. The internal reinforcements are temporarily protected by the resting blanks in case of fire or water, thus keeping the plate dimensionally stable for longer.

Soluble metal ions contained in clay and loam can migrate to the surface with the moisture present in the clay building materials and react there with oxygen. This can lead to the formation of manganese dioxide and thus to discoloration of the building material surface. This reaction can be reversed using reducing agents such as HDEP and hydrogen peroxide and effectively prevented by the use of chelating agents such as HEDP or citric acid.

The present application provides a kind of planting method of reducing allelochemicals and improving polysaccharide content of Rhizoma Polygonati, belongs to plant cultivation technical field.The planting method is planted in acidic sandy loam soil, and "biochar C" is applied to the soil 1-2 times in September-October of the second and third years, and the fruits mature, the stems are laid down after the third year, and then it can be harvested."Biochar C" is a modified, loaded with salicylic acid and UDP-D-galactose biochar.The present application not only helps to improve the physicochemical properties and bacterial community diversity of Rhizoma Polygonati planting soil, thereby reducing the allelochemicals content of Rhizoma Polygonati rhizome, but also can improve the polysaccharide content of rhizome, which helps to improve the quality of Rhizoma Polygonati and enhance its efficacy.

A three-dimensional anti-seepage structure under the sandy loam geological condition is of a three-dimensional closed structure formed by vertical anti-seepage walls, a horizontal anti-seepage layer and a drainage protection system in a cooperative mode, the drainage protection system is arranged in an anti-seepage space, the vertical anti-seepage walls are continuously arranged in the circumferential direction of the anti-seepage space, the vertical anti-seepage walls are stirring pile walls, and the horizontal anti-seepage layer is arranged on the horizontal anti-seepage layer. The horizontal anti-seepage layer is laid at the bottom of the anti-seepage space, a strong permeable stratum is arranged below the horizontal anti-seepage layer, the horizontal anti-seepage layer comprises a composite geomembrane, the composite geomembrane covers the upper portion of the strong permeable stratum in the anti-seepage space, and the drainage protection system comprises a soft longitudinal water collecting concealed pipe and a transverse communicating pipe which are arranged below the composite geomembrane. In conclusion, the anti-seepage device has the advantages that the anti-seepage efficiency is high, the capacity of adapting to differential settlement of a sandy loam foundation is high, pressure is effectively guided, drained and released, the underground water uplift pressure uplift damage risk is reduced, and the stability is high.

The invention relates to a mould assembling method for sand mould casting, which comprises the following steps of: firstly, preparing a casting sand box, and manufacturing a casting cavity with a to-be-produced forging press bracket outline inside; secondly, pre-positioning the loam core: placing the prepared loam core in a bottom box, positioning core heads at two ends of the loam core, placing a plurality of conical loam strips on the upper surface of the loam core, and covering the loam core with a cover box; then core supports are installed, wherein the cover box is opened, the reduced height of the mud strips at all positions is measured and recorded, and the mud strips are replaced with the core supports with the same height at the same position according to the reduced height of the mud strips; according to the box closing method, due to the fact that the mud strips are arranged, the best height selection of the chaplet can be conveniently confirmed, and the situation that the molding quality is affected due to floating of the mud core is effectively prevented.

The invention discloses a functional fertilizer for improving drought resistance of crops in a shajiang black soil area and a production method, and relates to the technical field of functional fertilizers. The functional fertilizer is prepared from the following raw materials in parts by mass: 70 parts of humic acid, 22 parts of a fermented organic fertilizer, 20 parts of geopolymer particles, 20 parts of crop straws, 12 parts of organic adsorption particles, 6 parts of polymer tackifying powder, 2.5 parts of a microbial compound inoculant, 5-15 parts of molasses synergistic liquid and 0.5-2 parts of polyglutamic acid. Wherein the molasses synergistic liquid is viscous liquid, and the total sugar content of the molasses synergistic liquid is greater than or equal to 20%; the polyglutamic acid is powdery, and the purity is greater than or equal to 85%; the polyglutamic acid comprises low-molecular-weight polyglutamic acid and high-molecular-weight cross-linked polyglutamic acid; the molasses synergistic liquid and polyglutamic acid with different molecular weights are introduced to form slow-release synergistic gel, so that the water-retaining property, the structural stability, the pesticide adsorption and retention capacity and the microbial activity of the shajiang black soil are synergistically improved, and the drought resistance of crops is remarkably enhanced.

Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. FIG. 1 Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. Mixing and placing calcium oleate, sodium silicate, S10 polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 20 25 20 15 77 04 M ar 2 02 5 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 1 / 2 FIG. 1 FIG. 2 1 / 2 Mixing and placing calcium oleate, sodium silicate, S10polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 Inorganic nano-seed crystal Hydration products 5 um FIG. 2 20 25 20 15 77 04 M ar 2 02 5 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2

The utility model relates to the technical field of seed sowing, and discloses a corn hybrid seed sowing and soil covering device which comprises a mounting plate, a material collecting box is fixedly connected to the upper surface of the mounting plate, a discharging pipe is connected to the lower surface of the material collecting box in a penetrating mode, a motor is fixedly installed on one side of the discharging pipe, and the output end of the motor is fixedly connected with a sowing disc. A mounting frame is fixedly connected to the lower surface of the mounting plate, two connecting shafts are fixedly connected to one side of the mounting frame, connecting blocks are rotationally connected to the exteriors of the connecting shafts, a soil covering plate is fixedly connected to one side of each connecting block, and an adjusting assembly is arranged on one side of the mounting frame. According to the soil covering device, the soil covering angle of the soil covering plate can be conveniently adjusted, the angle of the soil covering plate can be conveniently adjusted according to the soil texture when seeds are sown, the seeds can be uniformly and appropriately covered with soil, and the soil covering angle can be conveniently increased according to the characteristics that sandy soil is large in soil particle and prone to loosening; and the thickness and the stability of soil covering can be increased.

The present application relates to the technical field of surveying services, in particular to a sandy loam soil photovoltaic pile sinking high-precision positioning method based on image three-dimensional modeling, comprising the following steps: obtaining pile site area images through a preposed binocular industrial camera of a pile machine, constructing a ground point cloud according to soil texture parallax, generating a soil disturbance weight map by analyzing rut soil ridges and pile tip indentations, screening pile site candidate coordinates, combining pile pipe edge offset to calculate pile body deflection and output pile sinking positioning instructions. In the present application, through the joint judgment of soil disturbance and pile body deflection, the sandy loam soil surface layer slip participates in the landing point correction, the coordinate determination is continuously kept corresponding to the soil state under the condition of surface topography change, the horizontal movement mechanism and the pile pressing mechanism synchronously receive positioning control, the landing point drift caused by artificial scale transmission is reduced, the axis inclination caused by the friction of the pile body into the soil is inhibited, the cumulative deviation of the array reference line is limited, and the landing point consistency of the photovoltaic pile site is improved.

The application discloses a fish and turtle mixed breeding method, which comprises the following steps of pond reconstruction, anti-escape setting and pond cleaning and disinfection. In the pond reconstruction, a fish pond is changed into a mixed breeding pond with a depth of 0.8-2 m, and the pond slope is designed as a gentle slope with an inclination of 35-40 degrees. The soil at the bottom of the pond should have good water retention and air permeability, preferably clay or loam. In the anti-escape setting, an anti-escape wall is formed around the pond by iron sheets or wires, the anti-escape wall is buried in the ground by 10-15 cm, and the ground height of the anti-escape wall is 80-150 cm. In the pond cleaning and disinfection, quicklime is used for disinfection before hibernation, and the whole pond is sprayed and splashed with water according to the proportion of 30 kg per mu. The application belongs to the technical field of aquaculture, and specifically provides a fish and turtle mixed breeding method, in which soft-shelled turtles crawl on the pond bottom, stir the bottom mud, improve the bottom quality, and provide a better water environment for fish. The soft-shelled turtles eat some dead fish and part of miscellaneous fish in the fish pond, and the fish has almost the same color as wild fish, good taste and high selling price.

The utility model relates to agriculture and can be used for seasonal subsurface irrigation of trees, primarily in areas with sandy loam and sandy soils under conditions of extremely high temperatures and water shortages. The subsurface irrigation device, which includes a tank and a protective screen, according to the utility model, features a tank mounted in a permeable casing with a layer of black soil at the bottom. The tank, within the casing, is mounted on a waterproof protective screen made of bentonite or clay. The tank has a tube at the bottom for delivering water to the plant's rhizome. The top of the tank is equipped with a protective ring made of porous concrete, painted a reflective color. A light indicator connected to a float is installed in the neck of the tank.The device is equipped with a synthetic fabric cord placed in a tube to deliver water to the plant's rhizome for capillary irrigation. The cord's outlet end is connected to a geotextile skirt located around the rhizome. This subsurface irrigation device provides the required irrigation rate in sandy and sandy loam soils, maximizing the use of irrigation water for the irrigated tree's root system.

The invention discloses an electrical prospecting electrode observation system and method suitable for desert landscaps.The method comprises the steps that after electrode points are divided at the position of a preset survey line and a layout area is optimized, a pit body with a certain depth is excavated to avoid a high-resistance weathering layer of the earth surface, wetting treatment is conducted on the pit bottom and the pit wall, and an initial conductive interface is formed; a large-area metal sheet electrode is horizontally arranged in the center of the pit bottom, and a sufficient current conduction surface is provided; the integrity of a signal transmission path is guaranteed by connecting the insulated wire and reasonably leading out; clay or loam with the water content controlled to be 18%-22% is adopted for layer-by-layer backfilling, initial water replenishing is conducted after layer-by-layer compaction, and the equivalent resistance of a medium around an electrode is remarkably reduced; covering a moisturizing material, and standing for not less than 30 minutes, so that moisture fully permeates, and the electric field tends to be stable; dynamically supplementing water according to an environmental evaporation rule during observation, and maintaining a low-resistance state; and finally, accessing an acquisition system to complete potential reading, and evaluating multiplexing conditions after observation is finished.

This patent application describes environmentally friendly building materials and a method for their production. The materials in question essentially comprise clay, or loam and sand or RCA (recycled concrete aggregates), binders, water, and a filler material consisting mainly of plant fibers permeated by mycelium. For sustainability reasons, the filler material is preferably leftover substrate from mushroom cultivation or straw.

The application discloses a device and method for stripping grassland in a plateau cold region sandy loam matrix soil, and belongs to the technical field of water and soil conservation in a plateau cold region, and is mainly used for stripping turf in a plateau cold region sandy loam matrix soil grassland. The technical problem to be solved by the application is to provide a device and method for stripping grassland in a plateau cold region sandy loam matrix soil, which comprises a frame in a frame type, a spraying mechanism for spraying soil stabilizer is arranged on the top of the frame and faces the inside of the frame, a pressure bearing connecting rod is arranged above the frame and is connected with opposite sides of the frame, a connecting through hole for connecting with a hoisting mechanism hoisting rope is arranged on the pressure bearing connecting rod, a lower cutting mechanism for cutting into a soil body is arranged at the bottom of the frame and surrounds the frame, and a stripping mechanism for stripping grassland is arranged above the lower cutting mechanism in the frame. The device and method for stripping grassland in a plateau cold region sandy loam matrix soil can completely strip, transport and unload the stripped grassland, and has a high stripping speed and good stripping effect.

The invention discloses a method for realizing regular close planting, green prevention and control of weeds and non-heading Chinese cabbage planting by combining spray irrigation / micro-spray irrigation water supply through a specially-perforated full-biodegradable mulching film under the conditions of facility rain sheltering and an insect-proof net, relates to the technical field of vegetable cultivation and watering management, and is suitable for green infarction Chinese cabbages or seedling Chinese cabbages. Comprising the following steps: selecting sandy loam facilities for rain-sheltering cultivation, preparing soil, making turtle back furrows and applying base fertilizer; a black punching degradable mulching film is laid, the width of the film is 2.0 m, the width of a middle punching area is 1.3 m, the hole diameter is 3 cm, the hole pitch is 12 * 12 or 15 * 12 or 15 * 15 cm, and the thickness of the film is 6 microns or 8 microns; direct seeding or seedling transplantation is carried out according to hole sites, and one plant is reserved in each hole to form regular close planting; watering by spray irrigation / micro-spray irrigation until soil 2cm below the furrow surface is wet, supplementing water in the morning and evening or at night in the middle and later periods, and draining after raining; in the growth period, no ridge surface weeding is carried out, the weed plant control effect is larger than or equal to 92%, the mulching film does not enter the cracking period during harvesting, and harvesting is carried out 20-35 days after sowing and planting.

The utility model discloses a shrinkage-porosity-free vertical line pouring mold for a ductile iron hub, and belongs to the technical field of vertical line pouring molds. Comprising a pouring cup and a casting, a pouring system is arranged below the pouring cup, the pouring cup is connected with the pouring system through a slag-avoiding sheet, the pouring system comprises a vertical runway, and the vertical runway is communicated with the slag-avoiding sheet. The utility model solves the problems that the existing hub product has many processing and drilling positions, the probability that the hole wall is shrunk if the product has shrinkage porosity inside, and the feeding effect of the general process is difficult to meet the shrinkage-free requirement of the product because the product structure is thin outside and thick inside, and a counter bore is formed in the middle; the cavity is formed in the middle of the loam core, an inner riser is formed during molten iron punching, the riser is formed in the center of the two castings, the heat preservation effect is very good, the solidification speed is low, and therefore the feeding effect is greatly improved, and it is guaranteed that the interior of a product is not shrunk.

The invention provides a method for improving the survival rate of apple orchard building in a gravel gobi area, and belongs to the technical field of fruit tree cultivation. The method comprises the following steps: digging a planting trench, and backfilling a substrate material and sandy loam to form an improved planting trench; planting nursery stocks in the improved planting furrows, fixing trunks, sleeving the nursery stocks with moisturizing bags, and removing the moisturizing bags when sprouts grow to 2-3 cm; the substrate material comprises at least one of cotton straw, weed branches and miscellaneous manure; the total salt content of the sandy loam is less than 3.5 g / kg, and the pH value of the sandy loam is less than 8.5; the stock variety of the nursery stock is Qingzhou stock No.1, and the scion variety comprises any one of Qinbrin, Rayleigh and Vinus gold. The problems that gravel gobi soil is barren, water and fertilizer are prone to loss and the stress resistance of the seedlings is poor are effectively solved by improving the soil of the planting area, matching stress-resistant stock-scion combination and matching management and protection measures, the planting survival rate of the apple seedlings and the growth vigor of trees are greatly increased, and efficient orchard building of forest fruits in the gobi area is achieved.

The present application relates to the field of agricultural environment evaluation, in particular to a double cropping area crop rotation early warning system, and phosphorus is selected as the basis for indicating elements of rotation environment risk, the early warning system adopts a three-level index evaluation system, which is: annual phosphorus balance, soil texture, phosphorus fertilizer operation, according to the phosphorus surplus maintaining ability of different soil textures, the most suitable phosphorus balance of sandy soil, loamy soil and clay soil is respectively defined as 0.9-1.1, 0.8-1.2 and 0.7-1.3. The method of the present application is novel in design, and through a simple and scientific way, the double cropping area crop cultivation mode is warned, which is an evaluation tool for the influence of fertilization on the environment. It is convenient for users at different levels to select the best rotation mode.

The application discloses a water-microorganism colony-soil three-interface ecological interception zone, which comprises an ecological revetment, a biological reaction bed and a landscape greenway; the ecological revetment is located on the water side; the biological reaction bed is located between the ecological revetment and the riverway slope protection; and the landscape greenway is located on the surface of the biological reaction bed; the bottom of the ecological revetment is a riprap bottom layer; the water side is built by horizontally and vertically crossing round woods layer by layer; the middle cavity formed by the round wood building is filled with graded gravel, and the first plants are inserted into the gaps; the backwater side of the ecological revetment is filled with sand by filling the gaps with sandy soil, and the second plants are planted on the slope surface; the biological reaction bed is filled with different particle size filter materials layer by layer from bottom to top, and the layers are a water collecting layer, a biological reaction layer, a water distribution layer and a protection overlayer in sequence. The application can reduce the non-point source pollution in the surface runoff into the river at a low construction cost, without increasing the land use and low maintenance cost; and the water front landscape ecology and the riverway biological diversity restoration are realized simultaneously.

The invention relates to loam elements based on a compacted reed cob mass with reed stalks of different lengths arranged non-directionally therein as acoustically active, worked-in fibre material, wherein a plurality of reed stalks are cut in or through by means of a shape-imparting cutting, sawing or milling operation on the compacted loam material and as a result outwardly open cavities and channels of different shapes, sizes, lengths and orientation are produced in the cut surfaces of the loam elements, which provide the loam elements with a sound-absorbing functionality. The invention further relates to the production and the use of the loam elements in building construction, infrastructure construction and landscaping.

This invention discloses a method for simulating the wild cultivation of *Dictyophora indicum* using dead bamboo resources, comprising the following steps: digging trenches downwards in the soil layer between *Phyllostachys edulis* groves; placing a water collection layer at the bottom of the trench; laying a lower filling layer composed of chopped bamboo residue on top of the water collection layer; laying a middle filling layer composed of a mixture of chopped bamboo residue and humus on top of the lower filling layer; constructing a cultivation trough along the length of the trench on the middle filling layer for *Dictyophora indicum* cultivation; laying a layer of pre-prepared culture medium in the cultivation trough, then placing *Dictyophora indicum* spawn with multiple holes punched around its perimeter in the middle of the culture medium, and then evenly scattering the mycelium from inside the spawn evenly on the surface of the culture medium; covering the middle filling layer and culture medium with an upper filling layer composed of sandy loam; and finally covering the upper filling layer with a covering layer. This invention has high resource utilization, significant economic benefits, and obvious ecological benefits, achieving long-term moisture retention and nutrient supplementation, and enabling fruiting for many years.

The utility model provides a composite slope protection system based on blind ditch diversion drainage, which comprises diversion blind ditches, longitudinal lattice ridges, transverse lattice ridges and chain type slope protection building blocks, the surface of a slope is provided with the diversion blind ditches at specified intervals, and the two sides of the diversion blind ditches are paved with arched compacted covering soil; the longitudinal grid ridges and the transverse grid ridges are arranged on the surface of the slope in a crossed mode, the two flow guide blind ditches form a pair, and one longitudinal grid ridge is arranged at the central axis of each pair of flow guide blind ditches; the longitudinal lattice bars comprise longitudinal grooves, the transverse lattice bars comprise transverse grooves, longitudinal lattice bar concrete is poured in the longitudinal grooves through first stabilizing mechanisms, and transverse lattice bar concrete is poured in the transverse grooves through second stabilizing mechanisms. The chain type slope protection building blocks are laid in units formed by intersecting and separating the longitudinal grid stems and the transverse grid stems. The water-rich sandy loam slope protection device can effectively solve the protection problem of a water-rich sandy loam slope.

The utility model relates to ecological prevention and control technical field especially relates to a multilayer river course wood pile revetment, including water retaining area and revetment area, the revetment area sets up at the outside of river bank, is equipped with the diaphragm between the inside of revetment area and the outside of river bank, water retaining area sets up in the river course of revetment area outside, water retaining area includes first wood pile, water retaining area gravel layer, water retaining area soil layer and submerged plant, the utility model discloses through setting up the double -deck protection of water retaining area and revetment area, has improved the water flow impact resistance of river bank significantly, and water retaining area and revetment area fill gravel, soil and plant and plant, provide the continuous ecological corridor for fish spawning, benthic animal habitat, amphibian migration and bird foraging.

The invention discloses a pressure distribution adjusting method for plain soil compaction pile construction, relates to the technical field of pressure adjustment, is used for solving the problems of non-uniform soil body compactness distribution and increased stress diffusion unbalance degree, and provides a pressure distribution adjusting method for the plain soil compaction pile construction by monitoring hydraulic flow data of companding propulsion equipment, evaluating hydraulic driving characteristics and dividing response construction subdomains. The method comprises the following steps of: acquiring propulsion feedback resistance of each sub-domain, performing pressure release control processing on a response construction sub-domain, acquiring slippage springback data, analyzing a springback convergence state, performing sub-domain screening and marking in combination with the propulsion feedback resistance, calling neighborhood penetration resistance data of the marked sub-domain, evaluating a surrounding domain compaction grade, and generating a construction path sequence. And according to the construction path sequence, a domain allocation coefficient is set, domain propulsion loading pressure is corrected, domain regulation and dynamic optimization of pressure distribution are achieved, and compaction uniformity and construction stability are improved.

The application discloses a construction method for transforming a real grass football field into an artificial grass football field, and comprises the following steps: step 1, removing the original field lawn layer and root layer, leveling the base layer of the field, and making the base layer in a tortoise-back shape; step 2, backfilling medium-coarse sand on the surface of the base layer and compacting the medium-coarse sand; step 3, using a rotary cultivator to cultivate the medium-coarse sand layer to mix the medium-coarse sand in the medium-coarse sand layer and clay or loam in the base layer; step 4, finely leveling and compacting the field after the rotary cultivation, and controlling the hardness of the surface of the field; step 5, excavating blind trenches and filling the blind trenches with gravel and medium-coarse sand; and step 6, laying artificial grass on the well-leveled and compacted field and filling quartz sand and rubber particles. The construction method has the advantages of high construction efficiency, low cost and good drainage, simplifies the construction process, improves the construction efficiency, and reuses the clay or loam of the base layer, thereby reducing the construction cost and being convenient for wide popularization and application.

The invention relates to the technical field of astragalus membranaceus cultivation, in particular to an astragalus membranaceus cultivation method which comprises the steps of land selection and preparation, seed treatment, seedling culture, field management and pest control, and land selection and preparation comprises the following steps: S1, selecting sandy loam which is fertile in soil, sufficient in sunlight and convenient to irrigate, deeply ploughing for 30-45 cm, turning out the soil, scattering quicklime for disinfection per mu, and applying soil to the field; then 500 to 600 kg of base fertilizer farmyard manure, 160 to 170 kg of granular potash fertilizer, 65 to 70 kg of ammonium dihydrogen phosphate, 55 to 60 kg of ammonium sulfate, 105 to 115 kg of EDTA (Ethylene Diamine Tetraacetic Acid) chelated iron, 65 to 75 kg of sodium selenite and 32 to 40 kg of bacillus are applied per mu; according to the method, the seeds can be treated twice, so that the quality during seed selection can be improved, the death rate of astragalus membranaceus seedlings during subsequent astragalus membranaceus seed cultivation is reduced, meanwhile, the astragalus membranaceus seedlings are protected more comprehensively during seedling cultivation, the survival rate of the astragalus membranaceus seedlings is further increased, and the practicability of astragalus membranaceus cultivation is higher; meanwhile, the nutrition intake of the astragalus membranaceus seeds can be further increased during field management.

This utility model relates to a cofferdam for river management projects, comprising two Larssen piles driven into the bottom layers of silt, loam, and clay in sequence. Each Larssen pile has a top beam welded to its upper outer side, and the top beams are connected and fixed by steel reinforcement rods. Upstream of the Larssen piles, above the silt layer, is a ballast rock, and downstream, above the silt layer, is a ballast bag filled with soil. The entire interior section of both Larssen piles is filled with soil bags. The inner side of the Larssen piles is covered with tarpaulin along its height. A beam support plate is welded to the lower part of the top beam on the outer side of the Larssen piles. This utility model has a simple structure and, through the steel reinforcement rods, ballast rock, ballast bagged soil, and soil bags, can comprehensively ensure the overall stability of the cofferdam, improving its strength and performance.