151results about How to "Stable growth environment" patented technology

The invention relates to a restoration method for a damaged ecosystem in a steep-slope area in a water-level-fluctuating zone of a reservoir. The method comprises the following steps:when the impounded water level is at the lowest point, cleaning the upstream slope in the water-level-fluctuating zone, and manually tamping; digging planting holes at the top of the slope, and planting Chinese red pines and the like to form a multifunctional protective forest belt; digging planting grooves and planting holes within the range of the water-level-fluctuating zone, laying jute geotextile, planting vetiver within the range with the water-level-fluctuating depth of 2m to form a hedgerow; and mixedly planting vetiver and wire grass within the range with the water-level-fluctuating depth of 2-10m to form a combined vegetation slope restoration belt. The protective forest belt, the hedgerow and the combined vegetation slope restoration belt form a three-dimensional restoration space together, thereby ensuring that plants can take roots and restore in the steep-slope area in the water-level-fluctuating zone. By restoring the vegetation in large area, the invention effectively reduces the overland flow and the soil erosion, and improves the fertility and the properties of the soil, thereby restoring the damaged ecosystem. The invention has the advantages of convenient construction and less investment, can not be easily damaged by water, and is applicable to the water-level-fluctuating zone of a reservoir with large water-level-fluctuating range and precipitous topography.

The invention discloses a preparation method of a methane dry fermentation compound bacterial preparation, which comprises the following steps: mixing fermentation substrate with an inoculum which is compound bacteria composed of cellulose decomposing bacteria, proteolytic bacteria, fat decomposing bacteria, hydrogen-producing aceogenic bacteria, sulfate reducing bacteria and methanogenic archaea, adjusting the water content and pH of the mixed materials to 70-80% and 7.0 respectively, performing anaerobic fermentation under the condition of 35 DEG C plus or minus 2 DEG C for 60-90 days to obtain methane dry fermentation compound bacterial preparation. The preparation method of the invention can prepare compound bacterial preparation with a relatively complete methane fermentation function, and the total number of microbial cells and methanogenic archaea cells in the bacterial preparation are at least 10*10<10> / g and 1.0*10<8> / g respectively. Using the compound bacterial preparation as an inoculum of methane dry fermentation can reduce the starting time, and the fermentation process is stable and easy to control.

The invention discloses a method for restoring vegetations in a water-level-fluctuating zone. The method is capable of effectively preventing and controlling water and soil loss, intercepting and absorbing harmful chemical substances in a water body, reducing eutrophication of the water body and rapidly afforesting the water-level-fluctuating zone, and has the functions of fixing soil and retaining banks. The method comprises the following steps: 1) preparing soil of a riverside slope surface in a fluctuating zone, finishing the fluctuating zone along the contour line to form a step structure, and respectively digging a cuttage ditch on various steps of the step structure; 2) using nutrient soil to cover various cuttage ditches, inserting a plurality of living branch wooden piles, and connecting the adjacent living branch wooden piles on the same step by using a rope to form a whole, wherein planting grooves are formed between two rows of living branch wooden piles on the adjacent steps; 3) sequentially filling a lower mucky soil layer, a water supply layer, an upper mucky soil layer and a nutrient soil layer into the planting grooves from bottom to top so as to form a planting layer; and 4) respectively planting submerged plants, emergent aquatic plants and water-resistant tree shrubs in various planting grooves along the step structure from bottom to top, so that a three-dimensional vegetation restoring space is formed.

A process for treating the offensive smell in petrochemical sewage treating plant and cleaning the low-concentration waste organic gas features use of immobilized microbial membrane as filler and 1-3 stages of microbial treatment. It includes such steps as wet dusting for pre-treating, microbial treating and post-treating by absorbent.

The invention discloses a crop growing period alarming and intervening method based on remote sensing and mass climate information. The crop growing period alarming and intervening method includes the following steps that firstly, a crop growing period monitoring and alarming system is set up on a remote management center platform, and a crop growing period intervening system and a ground sensing system are laid in a crop planting area; secondly, basic data are collected, meanwhile a spectral analysis module analyzes and processes historical remote sensing information, and useful information data are extracted; thirdly, an alarming modeling module reads corresponding basic data in a data server to analyze and process the basic data, and corresponding alarming models are set up; fourthly, according to output conclusions of the three alarming models, agricultural experts formulate a corresponding intervening scheme; fifthly, crop growing is monitored in a remote mode and intervened. The crop growing period alarming and intervening method is simple in process, convenient to use, safe and reliable; monitoring and necessary intervening on the whole process of the crop growing period are achieved, and the crop growing period alarming and intervening method is of great importance on improvement of the quality and harvest of crops.

The invention relates to the technical field of cell culture and especially relates to an automatic cell expansion system. The automatic cell expansion system realizes automatic real-time regulation and control of the amount of gas dissolved in a cell growth environment and provides a stable growth environment for cell culture. The system comprises a culture liquid delivery device and a hollow fiber reactor communicated with the culture liquid delivery device through a culture liquid circulation conduit. The hollow fiber reactor comprises a culture liquid channel and a cell growth chamber. The culture liquid delivery device comprises a gas dissolver. The gas dissolver comprises a housing, a gas inlet, a culture liquid inlet and a culture liquid outlet, wherein the gas inlet, the culture liquid inlet and the culture liquid outlet are arranged on the housing. Through the culture liquid inlet and the culture liquid outlet, the gas dissolver and the culture liquid channel form a circulation loop. The automatic cell expansion system also comprises a gas supplying device communicated with the gas inlet. A gas flow control valve is arranged between the gas supplying device and the gas inlet. The automatic cell expansion system also comprises a control system electrically connected to the gas flow control valve.

The invention relates to a method for preparing selective microbial packing. A plant organic fiber or a mixture of the plant organic fiber and activated carbon is used as basic packing, and the method comprises the following steps of: screening, separating and purifying activated sludge to obtain specific desulfurization bacteria; massively propagating and culturing the bacteria in nutrient solution to prepare desulfurization bacterium mother solution; and performing nutrient solution soaking, spraying and mother solution biofilm formation on the basic packing to prepare the selective microbial packing. The biological packing is used for microbial purification in waste gas treatment, and is particularly used for removing stinky pollutants produced in petrochemical plants, sewage treatment plants, urban sewage treatment plants, animal husbandry farms and the like. By the method, class I pollutants in exhaust gases of a refinery are treated specially, the treatment load and efficiency of the pollutants are improved, and impact resistance during change of working conditions is improved.

The invention discloses an alarming and intervening device for refined agricultural crop growth. The alarming and intervening device comprises a power module, a display module, a satellite information receiving module, a storage module, a sensing monitoring module, a GPRS communication module, a ZigBee module and an embedded subsystem. The sensing monitoring module is externally connected with a soil monitoring sensor and a plant monitoring sensor. The storage module is internally loaded with a drought alarming module, an insect pest alarming module and a growth vigor alarming module, wherein the drought alarming module, the insect pest alarming module and the growth vigor alarming module are constructed in advance. The embedded subsystem is provided with a spectral analysis unit and an intervening scheme generation unit. The alarming and intervening device is simple in structure, convenient to use, safe, reliable and low in use cost. A crop growth alarming and intervening mechanism is provided, the growth environment of crops is optimized to the maximum, and the quality and the yield of the crops are improved. The intervening scheme is automatically generated by the system, and the proportion of water, nutrients, manure and pesticides can be allocated as required. Problems can be solved more effectively, and labor cost is reduced.

The invention discloses a method for breeding earthworms in a greenhouse. The method comprises the following steps: a place is selected to build an ecological greenhouse, wherein a ventilating system, breeding ponds and a vaporous water spray device are arranged in the greenhouse; a breeding feed is a mixture of fermented corn straw and cow dung, the fermented feed is put into the breeding ponds, a layer of loose soil with good air permeability is laid, 10000-15000 young earthworms are placed in each breeding pond, during daily management, the humidity of the breeding soil is controlled to be 20-70%, and the environment temperature is controlled to be 15-25 DEG C. According to the invention, a greenhouse breeding technology is adopted, the problems of diseases caused by environment temperature change can be effectively avoided during the breeding process, and a relatively stable growing environment is provided for earthworms; meanwhile, the breeding temperature is controlled to be 15-25 DEG C, so that the breeding period is shortened greatly; breeding in different ponds is adopted, so that a farmer can manage conveniently, the phenomenon that earthworms fleeing to other places during breeding is avoided, epidemic diseases can be effectively avoided, and breeding benefits of the farmer are increased.

The invention discloses a RGO / TiO2 (Reduced Graphene Dioxide / TiO2) photocatalysis composite material of graphene coated titanium dioxide with twice growth and belongs to the field of photocatalysis composite materials. Firstly, primary growth of TiO2 is regulated and controlled by adjusting the volume ratio of ethylene glycol to ethanol, types and concentrations of acids and hydrothermal reactiontime and temperatures, and thus unformed TiO2 is prepared; secondly, in secondary growth of TiO2, GO (Graphene Dioxide) is added to take a synergetic effect into play with the TiO2, and then GO is reduced into RGO. Under coating of the GO, the unfoamed TiO2 has a stable secondary growth environment and has the maximum contact area with graphene, the ultrahigh conductivity of the graphene is effectively utilized, hole compounding of TiO2 photoproduction electron pairs is greatly delayed, light absorption red shift is also resulted, and a light response area is widened to a visible light range.Meanwhile, pi-pi accumulation is allowed on a highly conjugated surface of graphene, so that the composite material has the characteristic that an aromatic compound is adsorbed preferably, and the properties of the material are greatly improved.

The invention discloses a method for full-crown transplantation of clustered cinnamomum camphora in summer. The method for transplantation and cultivation of clustered cinnamomum camphora in summer includes the steps of seedling selection, excavation, transport, plantation, conservation and the like. By means of a series of protection and conservation measures, full-crown transplantation of clustered cinnamomum camphora in summer is realized on the premise of high survival rate, so that the clustered cinnamomum camphora can be transplanted and sold in summer to greatly improve adaptability of the clustered cinnamomum camphora and increase values of the clustered cinnamomum camphora.

The invention provides a quality control method in a pot-type fermentation technique process of Pixian broad bean paste. The method comprises the following steps: A, preparing broad bean paste fragments: washing, steaming, and cooling by airing broad bean fragments, inoculating the broad bean fragments with aspergillus oryzae powder so as to obtain a broad bean starter materials, sending the starter materials to a fermentation pot, and adding lactobacillus powder and microzyme powder to the pot for fermentation so as to obtain the broad bean paste fragments; B, preparing capsicum blank: crushing capsicums, adding the crushed capsicums to a capsicum blank fermentation pot, and adding lactobacillus powder to the capsicum blank fermentation pot so as to obtain the capsicum blank; and C, feeding the broad bean paste fragments into the capsicum blank fermentation pot, uniformly mixing the broad bean paste with the capsicum blank in a mass proportion of 4:6, adding microzyme powder into the mixture, conducting uniform mixing, and conducting fermentation of 45-75 days so as to obtain the Pixian broad bean paste. For meeting quality requirements, the method improves an aroma and a fresh taste of the product, shortens a manufacturing cycle of the Pixian broad bean paste, and avoids pollution of pathogenic bacteria in the manufacturing process. The manufacturing occupies a small amount of land, and the method is applicable to large-scale industrial production so as to meet market demand quantity of the Pixian broad bean paste.

The invention discloses a preparation method of a biochar-immobilized naphthalene-degrading microbial agent. The method comprises the steps: weighing biomass raw materials and water, performing mixing, performing heating for a reaction, performing cooling to room temperature after completion of the reaction, performing solid-liquid separation, cleaning the solid product, performing freeze drying,performing grinding so as to obtain biochar, mixing a naphthalene-degrading strain with the obtained biochar in a LB liquid culture medium, putting the obtained mixture in a constant-temperature shaker, performing shaking culture so as to obtain a uniform mixed microbial solution, mixing the mixed microbial solution with a sodium alginate solution, performing magnetic and even stirring so as to obtain a sodium alginate-containing mixed microbial solution, adding the sodium alginate-containing mixed microbial solution dropwise to a calcium chloride solution, putting the mixture in a refrigerator, and performing still standing for a cross-linking reaction so as to obtain the biochar-immobilized naphthalene-degrading microbial agent. The prepared biochar-immobilized naphthalene-degrading microbial agent has an obvious remediation effect on soil which is contaminated by polycyclic aromatic hydrocarbon, and the method has mild reactions, low cost and no secondary pollution, and has broad engineering application prospects.

The invention belongs to the technical field of carbon material preparation. The invention relates to a preparation method of a carbon nanotube array, in particular to a preparation method of a super-long few-walled carbon nanotube array. According to the method, a lamellar material is used as a carrier, wherein the size and the distribution density of active particles of the catalyst are regulated and controlled through a stoichiometric ratio; cheap carbon-containing gas or liquid is used as a carbon source; a catalyst is loaded by a container, and sulfur element is introduced, so that the contact surface between the catalyst and the carbon source gas is fully enlarged, the growth space of the carbon tubes is enlarged, and the few-wall super-long carbon nanotube array is prepared; the growth rate is more than 10 times of the ratio of the mass of the grown carbon nanotubes to the mass of the used catalyst, the length can reach more than 200 microns, and the Raman IG / ID value is not less than 3.0. The preparation method is simple and efficient, low in raw material cost, high in product purity and excellent in graphitization degree, industrial production can be achieved by carrying large equipment such as an industrial rotary furnace, a fluidized bed and a moving bed, and the preparation method has great significance in promoting industrial production and application of high-quality carbon nanotubes.

The invention discloses a disposing method of organic waste water and residual mud reducing method in the dirty water disposing domain through biological technology, which is characterized by the following: the effluent disposal technology contains first-grade physiochemical disposal, aerobic segment two-grade physiochemical disposal and mud separation of two sedimentation pools; the nourishing grade of aerobic segment is divided into the following four parts from junior to senior according to food chain: bacteria dispersing growing pool, protozoa growing pool, meteorology growing pool and large-scale micro-animal growing pool; the bacteria decompose organics and the protozoa, meteorology and large-scale micro-animal reduce mud quantity to assist to decompose organics. The invention can be applied in the urban effluent disposal and industrial effluent disposal, which reduces mud quantity.

The invention discloses a field cultivation method for toadstools. The method comprises the steps of flat tent construction, ridging and sowing, interplanting, irrigation and permeation, field management and harvesting. According to the step of field management, when toadstool primordial grow on ridge faces in spring in the second year and the temperature of the ridge faces reaches 10 DEG C, a second layer of sunshade net is pulled up to be 45-55 cm above the ridge faces; when the temperature is increased to 15-20 DEG C, the second layer of sunshade net is gradually pulled up to be 195-205 cm above the ridge faces, and in the process, a distance is kept between the second layer of sunshade net and a black sunshade net arranged at the top end. According to the step of harvesting, when growth of toadstool entities is finished, the toadstools are harvested according to specifications. The cultivation method can effectively control the toadstool product quality, and improve the toadstool yield.

The invention relates to the field of diamond manufacturing, in particular to a diamond growth tray and system. The diamond growth tray comprises a base portion and a bearing platform arranged on thebase portion. The bearing platform is in a regular polygon frustum shape or a circular truncated cone shape, a groove is formed in the upper surface of the bearing platform, and the edge of an openingof the groove is designed to be chamfered. Compared with the prior art, the tray has the advantages that through the newly designed seed crystal tray, plasma distribution and electric field distribution on the surface of the seed crystal can be kept in the optimal state, it is guaranteed that the growth environment of the diamond seed crystal is stable, the number of surface growth defects is reduced, and finally a high-quality single crystal diamond piece is synthesized; by means of the newly designed seed crystal tray, the growth rate of impurities such as carbon black on the edge of the seed crystal tray can be remarkably reduced, it is guaranteed that the single stable growth time is longer, thicker products can grow at a time, and the production efficiency is improved.

The invention discloses a preparation method with component controllability and directional crystallization for a near-stoichiometric lithium niobate (N-SLN) crystal. A low temperature area, a high temperature, a temperature gradient area and a heat preservation area are formed in a hearth of a single crystal furnace in sequence, and a crucible successively passes through the four temperature areas. The preparation method successively comprises the following specific steps of 1, pre-crystallization material preparation: preparing two mixtures A and B formed by Li2CO3 and Nb2O5, wherein the molar ratio of Li / Nb in the mixture A is 1 to 1, and the molar ratio of Li / Nb in the mixture B is between 1 to 1 and 58.5 to 41.5; 2, furnace charging: putting lithium niobate seed crystal into a seed crystal groove of the crucible, a pre-crystallization material B is put on the shoulder of the crucible, a pre-crystallization material A is put on the monospaced part of the crucible; 3, material melting; 4, crystal seeding; 5, diameter enlarging; 6, monospaced growing; 7, ending; 8, annealing and cooling. An N-SLN crystal prepared by the method has the advantages that the size is large, the quality is high, the content of Li is uniform, energy consumption is low, the repeatability is high and the like, and the large scale production is easily realized.

The invention provides a farmland environment monitoring system. A central processing device, a humidity monitoring module, a signal processing circuit, an image acquisition module, an image processing module, a data transmission unit, a data transmission gateway, a display device, a battery pack, a solar assembly, a temperature monitoring system, an insect-pest situation monitoring module, an illumination monitoring module, a storage device, a wind speed monitoring module, a gas monitoring module, a cloud storage platform, an intelligent analysis platform, an intelligent terminal, a wirelesstransmission device and a user mobile phone are used for monitoring a farmland environment. The system has advantages of simple structure and reasonable design. Data are transmitted to the cloud storage platform for storage by the data transmission gateway; the intelligent cloud analysis platform analyzes and compares the data and pushes or transmits an abnormal result to the intelligent terminal,and then alarming is carried out; and meanwhile, responding to the query of the intelligent terminal is carried out and real-time monitoring of the growing environment of farmland crops is realized.

The invention relates to the technical field of crystal synthesis, in particular to a preparation device and a preparation method of a large-diameter diamond wafer. The device comprises a shell, a diameter detection unit, a lifting type rotating support and a mask unit. The shell is divided into an upper cavity and a lower cavity through a slit partition plate, and a microwave plasma is arranged in the upper cavity. According to the method, the diamond wafer is driven to rotate and ascend and descend through the lifting type rotating support, one part of the diamond wafer penetrates through the slit partition plate to be exposed in microwave plasma, the mask unit coats the diamond wafer with a mask, axial growth of the diamond wafer is inhibited, the diamond wafer only rotates and grows inthe radial direction, and therefore, a large-diameter diamond wafer is grown; and according to the feedback of the diameter detection unit, along with the increase of the diameter of the diamond wafer, the lifting type rotating support is gradually reduced, and the top height of the diamond wafer is kept unchanged, so that a stable growth environment is formed under microwave plasma.

The invention discloses a bare sand land vegetation quick recovery method. The method comprises the first step of selecting seeds, the second step of preparing a tile-type vegetation bag, wherein the second step comprises the procedures of a, conducting mixed matching on multiple plant seeds according to the proportion of the degree of dominance; b, uniformly mixing organic compost and sand according to the volume ratio of 1:3, and adopting the mixture as a seed growing matrix; c; sowing seeds on the growing matrix to prepare the tile-type vegetation bag. Compared with the prior art, through a phytocoenology investigation method, diversity analysis is conducted, seed selection is conducted according to the calculation of the degree of dominance, a natural or secondary growth plant community structure in a controlled region is simulated, according to a plant community natural matching rule, seed configuration is conducted on multiple selected species according to the degree of dominance, the adaptability of the seed in a local environment is guaranteed, the seeds are not prone to death, and the vegetation recovery effect is thus not influenced. By precisely calculating the size of the vegetation bag, the vegetation bag is convenient to deliver and lay, the vegetation bag can be entirely buried by wind and sand within a short time, the water and fertilizer are retained, and the vegetation bag is quickly degraded.

The invention discloses a shallow water river channel / small watershed ecological treatment system. The system comprises anti-impacting biological carpets which are laid on two embankments of a river channel and a plurality of water retaining flow slowing structures which are constructed in the river channel; the water retaining flow slowing structures are arranged in the water flow direction of the river channel sequentially, the water retaining flow slowing structures comprise reinforced ecological dams, underwater forests and wing dam type artificial wet lands, wherein the underwater forestsare constructed on upstream water retaining areas of the reinforced ecological dams, a plurality of the wing dam type artificial wet lands are arranged, the wing dam type artificial wet lands are constructed on downstream water retaining areas of the reinforced ecological dams, the wing dam type artificial wet lands are sequentially and staggeredly arranged in the water flow direction of the river channel, the adjacent two wing dam type artificial wet lands are connected with two river banks of the river channel respectively, and the wing dam type artificial wet lands are arranged to allow the water flow direction of the river channel to always be serpentine. The system has the advantages that the problem of poor shallow water river channel caused by the non-distinguished river channel and lake treatment in China, the water body self-cleaning capability is enhanced, and the long-effect purifying of the river channel is achieved.

The invention relates to the technical field of rural domestic sewage treatment, particularly to a rural domestic wastewater treatment system based on small watershed dispersity. According to the present invention, the rural domestic wastewater treatment process using the improved three-grid septic tank-oxidation pond-ecological ditch as the main body is constructed based on local conditions by completely considering the ditches formed by the abundant rainfall and the mountainous hilly terrain in the vast rural areas of southern China, the energy-consuming equipment such as pumps and the likeare not required to be additionally arranged, the additional power-free requirement is achieved, and the rural domestic wastewater treatment system has advantages of less investment, good effect, convenient operation and maintenance, no secondary pollution and the like, and the final effluent can achieve the Class V standard of Environmental Quality Standards For Surface Water (GB3838-2002).

The invention relates to a repair method of hard slope submerged plants. The invention adopts the technical scheme that the method comprises the following steps of: filling matrix required by the growth of submerged plants in planting cylinders, planting the submerged plants according to the seasonal variation, connecting a plurality of planting cylinders side by side in series by using connecting ropes to form a row type planting carrier, and fixing the planting carrier on a riparian zone bank slope by using anchor piles. The planting carrier can be well fixed on the riparian zone, so that wind wave impact is resisted, the stability of the carrier is kept, the matrix condition required by the growth of the submerged plants is provided, meanwhile, the loss of the nutritional matrix can be reduced, and the survival rate of the submerged plants is improved; and the method is low in cost, convenient to implement and remarkable in effect, and is favorable for coordination of riparian ecological conservation function, water purification function and landscape beautification function.

The invention relates to a three-dimensional self-control plant aerial fog cultivation apparatus with a novel temperature and light uniformizing control function. The three-dimensional self-control plant aerial fog cultivation apparatus comprises a three-dimensional planting barrel, a nutrient solution supply system, a light uniformizing rotary system, a temperature control system and a humidity control system; the fixing end of the light uniformizing rotary system is fixedly arranged relative to the ground, and the three-dimensional planting barrel is fixed on the rotary end of the light uniformizing rotary system; and the three-dimensional planting barrel comprises at least one planting space for planting and researching plants, the temperature control system and the humidity control system are respectively used for controlling the temperature and the humidity in the planting space; and the temperature control system comprises a temperature controller, a fan and a wet curtain arranged in the planting space, the temperature controller is electrically connected with the fan, and air currents generated by the fan pass through the wet curtain.

The invention relates to a method for preparing nano-structure single crystal silver. The method comprises the following steps of: reducing high-conductivity forming porous activated carbon containing chloride ion, putting the activated carbon into a silver-containing precursor solution, growing nano-structure single crystal silver on the surface of the activated carbon, providing a crystal nucleus and slow and stable crystal growth environment required by growth of single crystal silver through the silver-containing precursor and proper chlorine content, and obtaining nano silver single crystal with multiple features by controlling the concentration of the solution containing the silver-containing precursor and the growth time. The method belongs to a green synthesis method, pollution is avoided, any additive is not required, and the nano-structure single crystal silver is grown on the surface of the forming porous activated carbon at room temperature; the nano-structure single crystal silver is high in productivity, high in purity and easily separated from the forming porous activated carbon, the silver is naturally stripped after growth, and the activated carbon is ultrasonically treated by absolute ethyl alcohol or alkaline liquor and can be regenerated; and the obtained single crystal silver has the characteristics of high mechanical strength, high conductivity and low crystal defect.

The invention provides an atomized culture device for vegetables. The culture device is characterized in that a base, a nutrient solution recovery mechanism and planting steps are concentrically mounted in the culture device in sequence from bottom to top, the planting steps are fixed on the nutrient solution recovery mechanism, and the nutrient solution recovery mechanism is mounted on the base through tires in a rolling manner; a prime mover and transmissionmechanism is located below the base and is in transmission connection with the bottom of the nutrient solution recovery mechanism, and the nutrient solution recovery mechanism drives the planting steps to rotate on the base under the driving of the prime mover and transmissionmechanism; an atomizing assembly is arranged in a planting step cavity and connected with an external nutrient solution box; through holes are formed in both the base and the nutrient solution recovery mechanism, nutrient solution spray sprayed by the atomizing assembly is liquefied in the planting step cavity, then flows out through the through holes in the base and the nutrient solution recovery mechanism and flows back to the nutrient solution box through a pipeline, and the nutrient solution is recycled. According to the atomized culture device for the vegetables, incidence rateand culture cost of the vegetables can be reduced while vegetable yield is increased and vegetable quality is improved.

The invention provides a crystal growth assembly for preparing single crystals through a PVT method. The crystal growth assembly comprises a crucible and a heating device located above the crucible. The heating device is provided with a plurality of concentrically arranged annular heating temperature zones, so that the axial temperature gradient in the crucible is adjusted by controlling the overall heating temperature of the plurality of concentrically arranged annular heating temperature zones in the heating and / or crystal growth stage of single crystal preparation; and the radial temperature gradient in the crucible is adjusted by controlling the heating temperature of each annular heating temperature zone in the plurality of concentrically arranged annular heating temperature zones. According to the device for preparing the silicon carbide single crystal, the axial temperature gradient and the radial temperature gradient of the temperature field in the crucible can be controlled, so that the growth rate of the crystal is increased, the stable growth environment of the crystal is ensured, a relatively large crystal edge diameter gradient is maintained, the edge quality is improved, and meanwhile, the silicon carbide single crystal with a relatively large size is obtained.

The invention provides a three-dimensional multi-layer planting device comprising a greenhouse support, height adjusting plates, soil laying frames, sprinkling irrigation nozzles, an electric roller curtain mechanism, a lifting platform and a console. The greenhouse support is arranged perpendicular to a horizontal surface; the height adjusting plates are installed on the greenhouse support horizontally; the soil laying frames are arranged on the upper bottom surfaces of the height adjusting plates; the sprinkling irrigation nozzles are arranged in the soil laying frames; the electric roller curtain mechanism comprises tubular motors, roller curtain tubes and roller curtains, and is arranged on the upper portion of the greenhouse support, wherein the roller curtain tubes are located above the highest height adjusting plates, the tubular motors are arranged in the roller curtain tubes, and the roller curtains are arranged on the outer surfaces of the roller curtain tubes in a manner of being perpendicular to the horizontal surface; the lifting platform is arranged on the outer side of the greenhouse support; the sprinkling irrigation nozzles, the tubular motors and the lifting platform are all in electrical signal connection with the console. The device solves the problems of low automation degree, low space utilization rate, poor extreme weather resistance, high consumption of plastic film and great environmental pollution of greenhouses in the prior art.

The invention relates to the technical field of fruit tree growing, in particular to a golden pear growing method. By choosing golden pear seedlings in the growing process and soaking the golden pear seedlings in nutrient solution, the calli of the roots of the golden pear seedlings are buffered, consequently, a good environment is provided for the absorption of subsequent nutritional value, and thereby the survival rate of the grown golden pears is increased; moreover, in combination of the choice of soil of a golden pear growing base and the cultivation of the soil, golden pear growing method greatly improves the structure of the soil, consequently, the environment adaptability of the golden pear seedlings is enhanced, and the survival rate is increased.