123results about How to "Conducive to cultivation" patented technology

The invention provides a composite repair agent for soil heavy metal pollution as well as a preparation method and application thereof, and belongs to the technical field of soil improvement and environmental protection. A composite repair agent for soil cadmium pollution is prepared from the following components in parts by weight: 10 to 30 parts of sodium bentonite, 5 to 15 parts of bone powder,5 to 25 parts of chitosan, 5 to 30 parts of oyster shell powder, 10 to 40 parts of graphene-modified crop straw biochar, 10 to 30 parts of bio-organic fertilizer, 15 to 45 parts of sodium silicate, 1to 15 parts of nano-FeO, 1 to 8 parts of carbon nanotubes, and 1 to 10 parts of microbial inoculants. The number of each 10 mg colonies of rhodotorula mucilaginosa OP11 in the microbial inoculum is 2.25*10 <8> to 2.5*10<9> CFU; the preservation number of the rhodotorula mucilaginosa OP11 is CGMCC No. 13540. The application of the composite repair agent is in remediation of heavy metal contaminated soil.

The invention discloses a composite soil passivator for reducing contents of cadmium and lead as well as a preparation method and an application method of the composite soil passivator. The composite soil passivator comprises the following components in percentage by weight: 5-15wt% of composted chicken manure, 5-15wt% of composted mixture of rice chaff and husk, 5-15wt% of turf, 10-20wt% of silicon-calcium-magnesium-potassium fertilizer, 5-15wt% of talcum powder, 25-35wt% of sepiolite, 10-20wt% of stacking fermented sugarcane filter mud and 1.5-2.5wt% of microbial fermentation liquor. The composite soil passivator can be widely applied to the mild and moderate cadmium / lead polluted rice fields to ensure that active cadmium and lead of the soil in the heavy metal polluted rice fields are respectively reduced by 51.5-51.6% and 52.6-58.8%, the cadmium and lead contents of the polished rice are respectively reduced by 48.8-51.6% and 52.7-56.0% and the pH value of the soil is improved by 0.97-1.04; and the composite soil passivator has the functions of restoring the acidized soil, improving the soil fertility and improving the physicochemical property of soil and has huge popularization and application values.

The invention relates to the field of soil remediation, particularly to a composite conditioner for remediation of farmland heavy metal contaminated soil and a preparation method thereof. The composite conditioner comprises the following substances in parts by mass: 40 to 55 parts of modified biological carbon, 15 to 25 parts of poultry manure, 15 to 25 parts of modified clay, 5 to 8 parts of phosphate and 5 to 12 parts of quick lime. Through combined utilization of organic modified substances, inorganic modified substances and other effective components, the composite conditioner achieves the good effect of multi-action synergetic remediation, and has the characteristics that the cost is low, the effect is good, the stability is high, the soil cultivability can be improved, and increase of crop yield and income is facilitated.

The invention relates to a method for improving soil in a saline-alkali land. The method is characterized by comprising the following steps: (1) punching the soil and improving the harden degree of the soil; (2) fertilizing; and (3) watering. A fertilizer applied to the method for improving the soil in the saline-alkali land adopts a formula containing a microorganism organic fertilizer after greening waste treatment, fine sand and a plant growth regulator at a volume ratio of (70-80):(19-29):1. The method has the technical effects and advantages that 1, the punching fertilizing excellently solves the phenomenon that a sloping lawn cannot normally absorb water fertilizer and causes the lawn to vigorously grow; 2, the border trees treated by taking a punching ventilating nutriment-replenishing measure are characterized in that the blade color is deeper, the blade is fat and the leaves are lush; 3, the harden soil is loosened and the water-holding and fertilizer-retaining capabilities of the soil are enhanced; 4, the soil is improved and fertilized; and 5, the environmental protection is benefited.

The invention relates to the technical field of crop food safety control, and concretely relates to a soil conditioner for reducing the activity of heavy metals in soil, a preparation method thereof, and a method for reducing the content of heavy metals in rice. The soil conditioner for reducing the activity of heavy metals in soil comprises, by mass, 1-3 parts of expanded vermiculite powder, 1-3 parts of steel slag powder, 1-3 parts of lime and 3-5 parts of an organic fertilizer. The soil conditioner effectively and stably passivates the heavy metals in polluted farmland soil, improves the fertility of the soil, improves the soil tilth, promotes growth of rice, reduces the use amount of a chemical fertilizer, and facilitates yield and income increase. The method for reducing the content of heavy metals in rice, combining the soil conditioner with water and fertilizer controlled plantation of the rice, has the advantages of low cost, easiness in enforcement, greenness and environmental protection, and effective reduction of the content of the heavy metals in the rice.

The invention provides a structural conditioner for the artificial soil on a slope, which is prepared by the following raw materials of components according to weight percentage by compounding and mixing: 15 to 35 percent of livestock manure, 5 to 10 percent of sawdust, 1 to 10 percent of chitosan, 1 to 20 percent of carboxymethyl cellulose, 0 to 10 percent of PVA, 0 to 10 percent of citric acid, 20 to 45 percent of humic acid, 10 to 25 percent of bentonite and 1 to 15 percent of plant ash. The conditioner has obvious effects on the aspects of coordinating the contradiction between soil moisture content and the air, coordinating the contradiction between the consumption and accumulation of soil nutrients, stabilizing the soil temperature, adjusting the soil thermal regime, improving the soil tilth and promoting the growth of plants.

The invention relates to cells and a method for producing acetone.

The invention belongs to the technical field of corn planting and particularly relates to corn planting and land improvement synchronous equal ratio empty cave bunch planting and supporting cultivation. The planting method comprises the following steps of land preparing and ridging, equal ratio empty cave bunch planting and fertilization, harvesting, stalk application and one-year fallow land improving, transferring rotted stalk into an organic fertilizer, and crop rotation planting. The equal ratio empty cave bunch planting method is adopted, corns can be well ventilated with light transmitting in both transverse and vertical directions, therefore, during the growth of corns, light energy absorption and light energy utilization and transformation in high photosynthetic efficiency can be achieved, increases of the corncob row number, the row niblet number and the thousand kernel weight are promoted, the formation of large corncobs is promoted, the lodging resistance of the corns is enhanced, the water content of the corns drops by 2-5%, and the yield increase range of the corns can reach 5-20%. According to the equal ratio empty cave bunch cultivation, 50% of a land can be fallowedand improved, fertilization and land fertility are achieved, the soil is loosened, surface water is preserved, and 40-50% of fertilizer usage amount is reduced. The corns can be planted organically and efficiently in a green and low-carbon mode.

The invention relates to a method for saving electrical energy of a water circulation system and a multipurpose humidifier manufactured by using the method, belonging to the technical fields of household appliance energy conservation and plant cultivation. The method is as follows: a high-level water storage tank the side wall or bottom of which is provided with a plurality of drip small holes is arranged in the water circulation system, so that water can still continuously drip after a water pump is turned off, thereby achieving continuous water circulation. The method is mainly used for culture of household ornamental fish and the novel multipurpose humidifier with high humidity requirement and a plant cultivation function.

The invention provides a watermelon-rice interplanting method. The watermelon and the rice are simultaneously interplanted in the same patch. The watermelon-rice interplanting method is characterized by comprising the following steps of: 1, selecting the patch suitable for paddy-upland planting to deep tillage and freeze furrows before winter, and selecting the proper rice, watermelon and stock varieties; 2, preparing the land and fertilizing in the spring ploughing season, sowing rice and covering a mulching film after moisture in the soil is flat, soil is fine and three grooves are assorted, and ensuring that rice seedlings are completely sprouted after humidity sowing is carried out for 10-15 days; 3, transplanting and planting the watermelon seedling which is well sown, cultured and grafted in advance on the center of the humidity surface of a mulching film, and ensuring that the all-field farming focuses on the routine management of the watermelon; and 4, after the watermelon is harvested, transferring the field management into a mode that the rice management is focused until the rice is harvested. According to the watermelon-rice interplanting technology, the stubble clearout problem due to the fact that two crops are planted in sequence is solved, the input-output ratio of the unit patch is greatly improved, labor, water and fertilizer are saved, the soil is nourished, the watermelon can be protected and reserved by the rice, the rice seedling is strong, and the yield is high.

The invention provides a seedling cultivation device for vegetable planting, and relates to the technical field of seedling cultivation for vegetable planting. The device comprises a base. An n-shapedsupporting frame is fixedly connected at the top end of the base, a solar panel is mounted at the top end of the n-shaped supporting frame, a liftable punching mechanism is connected in the n-shapedsupporting frame, and an opening and closing mechanism is mounted outside the liftable punching mechanism. The device has the advantages that a first motor is started by an external power supply underthe action of the liftable punching mechanism, so that a first gear rotates anticlockwise, second gears on two sides are engaged and drive a screw to rotate through inner rings of vertically connected bearings, a supporting plate block connected with the screw in a threaded manner moves downwards in a first sliding groove in the inner wall of the n-shaped supporting frame through a first slider when the screw rotates, and soil is punched by an arc-shaped clamping plate connected at the bottom end of a connecting steel tube connected at the bottom end of the supporting plate block. By the aidof a set structure, the soil is conveniently punched by the device, seeds are conveniently placed, and holes with different depths can be conveniently formed in the soil, so that different vegetable seeds are conveniently sown.

The invention discloses a multi-functional sickbed and belongs to the field of nursing devices. Both sides of the bedhead of the sickbed are provided with an electromagnetic therapy device respectively, each electromagnetic therapy device comprises a first linkage mechanism and an electromagnetic head, both ends of the first linkage mechanism are connected with the bedhead and the electromagnetic head, the first linkage mechanism comprises three connecting rods connected through cardan joints successively from head to tail, a storage box for fixing the electromagnetic head is arranged at bedhead, one side of the bottom of the sickbed is provided with a storable shoe rack, the shoe rack comprises a lower plate, an upper plate and a second linkage mechanism arranged between the lower plate and the upper plate, the second linkage mechanism is arranged on two corresponding sides of the lower plate and the upper plate respectively, and the bedhead of the sickbed is provided a switch connected with the second linkage mechanism through a control cable and the shoe rack can be controlled through the switch. Therefore, in case that a patient needs to get out of the sickbed, the patient doesn't need to stoop down to grab shoes, and thus great convenience is achieved and electromagnetic physiotherapy can be carried out on patients through the electromagnetic head.

The invention discloses a fertilizer for corns in the saline-alkali soil and an application thereof, belonging to the technique of soil improvement and efficient fertilization, solving the problems of easiness in soil hardening, bad soil structure, bad tilth, and low bioavailability of nutrients required by corn growth caused by high pH and high salinity. The fertilizer for corns in the saline-alkali soil comprises 7.3 weight parts of sulfurous fertilizer, 10 weight parts of humic acid, 24 weight parts of N, 12 weight parts of P2O5, and 6 weight parts of K2O. When the fertilizer is applied, the application amount is 50kg / mu. The fertilizer disclosed herein is suitable for corn production in the saline-alkali soil, can improve the physical and chemical property of the soil and reduce the accumulation of salts on the soil surface, and can raise the corn yield by 20-30%.

The invention discloses a club fungus cultivating method and a product thereof. The club fungus cultivating method comprises the steps that basal cell division is promoted while auricularia polytricha sporocarp development is interrupted by adjusting and controlling temperature and light intensity and cooperating with proper high-concentration CO2, top end cells of auricularia polytricha bases are simulated to continue to divide and growth upwards when normal cell division in auricularia polytricha basal bodies is up to a certain degree, so that the auricularia polytricha bases undergo the expanding, growing and proliferating process and bifurcate from the base portions, the middle-upper portions bifurcate for multiple times to form clusters, the top ends form finger-shaped cluster sets, finally coral grape vine shapes are formed, and the appearance, taste and nutritive value of club fungi are superior to those of club fungi of auricularia polytricha.

The invention discloses a special selenium-enriched organic fertilizer for agaric and relates to the field of fertilizers. The organic fertilizer specifically comprises the following raw materials: chicken manure, duck manure, pig manure, selenium-enriched corncob, wheat bran, bean dregs, humic acid, bone meal, scoria, lotus seed skin, garlic, mangosteen fruit skin, lycium ruthenicum residues, selenium-enriched waste tea leaves, overdue milk and purple sweet potatoes. A preparation method of the special selenium-enriched organic fertilizer for agaric comprises the following steps: (1) pretreating the raw materials; (2) mixing and stirring; (3) performing composting fermentation; and (4) bagging and sterilizing. The special selenium-enriched organic fertilizer for agaric disclosed by the invention is prepared from raw materials readily available and is rich in nutritional ingredients, the yield of agaric can be improved, and the harvested agaric is rich in selenium.

The invention discloses a disinfection and inoculation method of microphyte seeds and pollen. A special disinfection and inoculation technology for small seeds and plant pollen in a tissue culture process is designed by utilizing seeds and plant pollen of microphytes including orchids as materials in combination of a disinfection method of the tissue culture technology and tools such as an injector and the like; according to the technology, the problems that effective disinfection cannot be realized and a disinfectant cannot be completely removed due to too small orchid seeds and most plant pollen are solved, and the contamination rate in the tissue culture can be effectively reduced to be lower than 5%. Besides, with the adoption of the technology, disinfection and inoculation speeds can be greatly increased, meanwhile, due to the fact that a low-concentration sodium hypochlorite solution can effectively destroy seed coats of the microphyte seeds and cell walls of the pollen and cannot damage seed embryos and pollen cells, accordingly, the microphyte seeds of the plants such as the orchids and the like or the pollen cells of the plants can absorb nutrition of a culture medium more easily, and the seeds germinate 3-5 days in advance.

The invention discloses a cutting and seedling growing method of common fibraurea stem, belonging to the technical field for cutting and seedling growing plants. The method comprises selection of cutting branches, shearing way and cutting way of the cutting branches, wherein the selection of the cutting branches consists of selecting half-lignified branches growing in the current year or last year to be as the seedling growing and cutting branches, wherein the diameter of the branches is 0.3-0.5 cm; the shearing way of the cutting branches comprises the steps of: when a slope cutting mouth is sheared, selecting a stem node with a sprout, shearing the centre of the stem node downwardly to form a bevel section, and maintaining 1-2 eyes at the other end of the bevel section; and the cutting way comprises the steps of: during cuttage, maintaining the penetrating angle of the cutting branches and ground as a 45-degrees inclination angle, cutting 1 / 3-2 / 3 of each cutting branch into soil, and keeping an eye at the part above ground. According to the method, the seedling growing cost can be reduced and shoot buds of the sprouts are increased; the seedlings come out evenly; the survival rate of the sprouts is improved profitably; and the rate of emergence reaches 90-95%.

The invention provides a method of planting tricholorna lobayense taking bamboo leaves as a base material. The compost comprises the following raw materials: 50 to 80 parts of bamboo leaves, 30 to 40 parts of dead branches, 10 to 25 parts of peanut shells, 8 to 22 parts of longan shells, 5 to 18 parts of green vines, 4 to 16 parts of cow dung, 3 to 14 parts of soya-bean cakes, 3 to 13 parts of husks, 2 to 8 parts of magnesium sulfate, 2 to 6 parts of urea, 1 to 4 parts of benzoin, 1 to 4 parts of lignum, 2 to 4 parts of lime and 1 to 3 parts of pomelo peels. The method has the beneficial effects that the materials are convenient to obtain, rich in resource quantity, the demand of planting the tricholorna lobayense at multiple places can be met, and a yield period is short, the cost is low, and the operation is simple.

The invention discloses a method for preparing lifetime genic male-sterile rice and a method for cultivating hybrid rice by the lifetime genic male-sterile rice. In the method for preparing the lifetime genic male-sterile rice, the lifetime genic male-sterile rice is obtained by carrying out hybridization on a photo-thermo-sensitive genic male sterile line and a low temperature sensitive male sterile line. In the method for cultivating the hybrid rice, the hybrid rice is obtained by carrying out hybridization on the lifetime genic male-sterile rice and any conventional rice. The hybrid rice is prepared by using the lifetime genic male-sterile rice as a female parent and using the conventional rice as a male parent. F1 hybrids are normal and can be cultivated. The application of the lifetime genic male-sterile rice to the rice hybrids has the advantages that not only can the defect of failure of hybrid seed production, which is caused by instable fertilities of the two male sterile lines in a two-line method, be overcome, but also due to a large male parent selection range, compared with a three-line method, the method is easier to calculate the hybrid rice with high quality and high yield.

The invention provides a heavy metal contaminated farmland soil remediation agent. The heavy metal contaminated farmland soil remediation agent is prepared from, by weight, 10-25 parts of medical stone powder, 15-27 parts of carbonized rice husks, 10-25 parts of steel slag powder, 10-20 parts of weathered coal, 10-25 parts of lime, 10-25 parts of white carbon black and 12-24 parts of organic fertilizer. The heavy metal contaminated farmland soil remediation agent is applied to a soil surface of a heavy metal contaminated farmland and evenly mixed with soil, the soil moisture is kept to reach the maximum field water-holding capacity, and crops can be planted 5-8 days after balance. Heavy metals in the soil are quickly, efficiently and stably passivated through multiple modes such as combined precipitation, adsorption, complexing and acid-base buffering, the activity of the heavy metals in the soil is reduced, the passivated heavy metals are prevented from being activated again, and theeffect of finally reducing the activity of the heavy metals in the farmland soil is achieved.

The invention provides a nursery stock nutrition medium preparation method which comprises the following steps: a, mixing, dewatering and drying clay, cow dung and plant waste leaves and then grindingto obtain a first raw material; b, adding corn stalk, plant cellulose, magnesium sulfate and a nutrient solution into mushroom dregs, fully mixing, then sealing, heating and fermenting, then adding zeolite powder and saltpeter powder and evenly stirring to obtain a second raw material; c, adding ailanthus leaves, herba houttuyniae, a soil nutritional agent and a deinsectization agent into distilled water, soaking, utilizing a pulp grinding machine to grinding pulp and filtering, adding the first raw material, the second raw material and expanded perlite into filtrate, adding an obtained mixture into a ball mill to be ball milled, then filtering, adding ammonium phosphate and gibberellin into obtained filtrate and evenly stirring to obtain a third raw material; d, drying the third raw material and sealing and packaging to obtain the nursery stock nutrition medium. The preparation method disclosed by the invention is simple; the raw materials are natural, are environment-friendly and are easy to obtain; the prepared nutrition medium has the advantages of stable performance and good fertilizer efficiency.

Relating to the technical field of edible fungus cultivation, the invention provides a culture method of selenium-rich edible fungus. The method includes the steps of: (1) blending: taking chicken manure, duck manure, pig manure, selenium-rich cob, wheat bran, bean dregs, humic acid, bone meal, volcanic cinder, lotus seed skin, garlic, mangosteen skin, Lycium ruthenicum residue, selenium-rich waste tea, expired milk and purple sweet potato, conducting fermentation to prepare a culture material, adjusting the moisture content of the culture material to 60-70%, and adjusting the pH value of the culture material to 5.3-6.3; (2) bagging; (3) sterilization; (4) inoculation; (5) mycelium culture; (6) fungus yield management; and (7) harvesting. The culture method of selenium-rich edible fungus provided by the invention can produce selenium-rich edible fungus with high yield.

The invention aims to provide insect-proofing charcoal rot slow-release urea. The technical scheme comprises that the slow-release urea is composed of 1 to 5.5 parts by mass of a slow-release film-coating agent and 94.5 to 99 parts by mass of urea. The slow-release film-coating agent comprises the raw materials: activated humic acid, biochar, glucomannan, dextrin, glycerol and water. The insect-proofing charcoal rot slow-release urea has the beneficial effects that the film-coating agent plays a role in slow-releasing urea nutrients, prolongs the urea nutrient release period and reduces the operation process of fertilizer application. Humic acid in the film-coating agent has an effect of inhibiting on the activity of urease on decomposing urea, the ammonia stability performance is kept, and nutrients are released gradually. Biochar can play roles in improving the soil ability and keeping the balance of water and fertilizers, and also has the effect of expelling insects.

The invention discloses water-retention andvigor-sustaining fertilizer for garden trees and flowers and a preparation method of the fertilizer. The water-retention and vigor-sustainingfertilizer is prepared from raw materials in parts by weight as follows: 11-22 parts of dry red soil, 6-11 parts of furfural residue, 8-15 parts of coco coir, 13-20 parts of monazite powder, 4-8 parts of strain powder, 2.5-6 parts of folium mori, 15-21 parts of garden soil, 7-12 parts of bone meal, 1.5-3.2 parts of rape seed cake, 1.2-3.4 parts of Chinese medicine residue and 1.3-2.4 parts of monoammonium phosphate. The green fertilizer adopts a simple formula, the raw materials are natural, rich, environment-friendly and easily available, resource recycling is realized by means of the furfural residue, the production cost is reduced, the green fertilizer with stable performance and higher quality is obtained, the fertilizer efficiency is good, further, soil fertility is enhanced by a nutrient solution for soil, and material guarantee is provided for soil improvement, soil tilth improvement and soil fertilization engineering.

The invention discloses an immobilized nutrient soil particle as well as a preparation method and application thereof, belonging to the technical field of soil. The immobilized nutrient soil particlespecifically comprises the following raw materials in parts by weight: 20-100 parts of river sediments, 10-50 parts of an organic fertilizer, 1-30 parts of a microbial agent and 1-30 parts of a chemical fertilizer. The preparation method comprises the following steps: uniformly mixing the decomposed organic fertilizer with the microbial agent, the dehydrated river sediments and the chemical fertilizer, and successively conducting granulating, drying and hardening to obtain the immobilized nutrient soil particle. When the nutrient soil particle is used, the nutrient soil particle is uniformly spread on the surface of desertified soil, and then turf is spread on the surface of the immobilized nutrient soil particle. According to the method, rich trace elements such as Ca, Mg, Zn, Cu and Fe and organic matters contained in the sediments can be returned to natural environment for circulation again, so an effective way is provided for recycling of the river sediments, and meanwhile, an effective solution is provided for recovery of barren soil and desertified soil.

The invention relates to an expansive soil cut slope support structure and a construction method thereof, in particular to the field of highway and railway cut slope protection of expansive soil regions. The expansive soil cut slope support structure comprises a rigid supporting system, a flexible protection system and a waterproof and draining system. The rigid supporting system comprises a lame retaining wall arranged on an expansive soil cut slope and a retaining wall foundation; the flexible protection system comprises a lattice beam arranged on the expansive soil cut slope, an anchor rod, a flexible net-shaped geogrid laid on the slope surface and a plant cover planted on the slope surface; and the waterproof and draining system comprises an intercepting ditch or drainage ditch arranged at the top of the slope, a permeable layer positioned behind the retaining wall, a drainage ditch and a drainage seepage ditch positioned below the drainage ditch. The slope surface is supported through a flexible supporting system, and in comparison with a rigid supporting method of fully laying a mortar rubble structure on the slope surface, the construction cost is reduced by over 20%, and the construction period is greatly reduced; and expansive force generated when expansive soil is met with rainwater and expands can be effectively released.

The invention discloses preparation and application of a potassium silicate control loss type compound fertilizer. The compound fertilizer is prepared from the following raw materials in percentage byweight: 20.0-80.0% of potassium silicate and the balance an organic and inorganic compound fertilizer body and an auxiliary agent. The fertilizer is suitable for acidic soil and can form a special colloid structure with soil particles in the acidic soil, so that the nutrient loss of the fertilizer is prevented, nutrients are fixed around a crop root system, crops absorb the nutrients according toneeds, and therefore the nutrient supply capacity of the crops is greatly improved, the healthy and rapid growth of the crops is guaranteed, the utilization rate of the fertilizer is improved, the utilization rate of the nutrients reaches up to 85.0% and is far higher than the utilization rate of a conventional fertilizer of 35.0%.

The invention provides a special fertilizer for Lonicera macranthoides, which is characterized by comprising the following components in percentage by weight: 50.0-70.0% of composted chicken manure or any other poultry or livestock manure (by dry matter weight), 25.0-45.0% of inorganic fertilizer (by dry matter weight), and filler. The invention also discloses an application method of the special fertilizer for Lonicera macranthoides. The special fertilizer for Lonicera macranthoides has the advantages of high harmless degree, high organic content and abundant nutrient substances, and is beneficial to growth and ripening of Lonicera macranthoides.

The invention provides a technology for extracting glutathione peroxidase with a biological method, specially comprising the steps of: a. in the environment that the temperature is 8-10DEG C and sun illuminance is 3500-4000 LUX, selecting selenium rich moss with the depth of 8-15cm as culture base material, and guaranteeing the water content of the soil for growing the selenium rich moss to be 50%-65%; b. burying seeds of rubus crataegifolius bge into the selenium rich moss of the step a according to plant distance of 10-15cm and row distance is 10-15cm; c. after three moths to three and a half moths, picking leaves of the rubus crataegifolius bge to be standby; d. preparing solution with water, salt and pure selenium according to the mass ratio of 100:2:1; and e. dipping the leaves in thestep c with the solution in the step d at normal temperature for 0-20 minutes, washing out impurity on the leaves, drying and grinding. The method is a pure biological extraction method; and comparedwith the chemical extraction method, the method is easily operated, saves labor power and physical resources, and has a good effect.

The invention relates to a microalgal bio-based nitrogen-doped carbon material and a preparation method thereof. The method comprises the following steps: carbonizing microalgae for the first time toobtain semicoke, and carbonizing the semicoke for the second time in a nitrogen atmosphere to obtain the nitrogen-doped porous carbon material. The content of elemental nitrogen in the microalgal bio-based nitrogen-doped carbon material is 2.9 wt%, the specific surface area of nitrogen can reach 1893.26 m<2>.g<-1>, and the CO2 adsorption capacity at 0 DEG C can reach 5.72 mmol.g<-1> at most; and in a double-electric-layer supercapacitor system, specific capacitance can reach 335.7 F.g<-1> at most under the high current density of 1A.g<-1>. The microalgal bio-based nitrogen-doped carbon material can be used for adsorbing gas and manufacturing a double-electric-layer supercapacitor.