1991results about "Soil conditioning compositions" patented technology

The invention discloses bacillus velezensis YB-1652, a biocontrol microbial inoculum and application of the biocontrol microbial inoculum, and aims to solve the technical problem of lack of effective biological control measures for continuous accumulation of peanut phenolic acid autotoxic substances and pathogens in continuous cropping. According to the application, a bacillus velezensis YB-1652 strain is separated and screened from rhizosphere soil of continuous cropping peanuts, and the preservation number is CGMCC (China General Microbiological Culture Collection Center) No.36152. The strain has the capability of efficiently degrading phenolic acid compounds, relieves continuous cropping obstacles and improves the soil environment; the compound has a relatively strong inhibition effect on southern blight and root rot of peanuts, and the occurrence rate of soil-borne diseases is reduced; meanwhile, peanut growth can be promoted; the bacillus amyloliquefaciens has siderophore, cellulase, beta-glucanase, amylase power and protease production capacity. The YB-1652 strain and the preparation thereof can provide technical support for restoration of peanut continuous cropping obstacles, provide bacterial source guarantee for prevention and treatment of peanut soil-borne diseases, replace or reduce use of chemical pesticides and improve food and ecological environment safety, and have good economic and social benefits.

The invention discloses a multifunctional low-temperature corn straw degradation complex microbial inoculant, a preparation method and application, the complex microbial inoculant is compounded by a plurality of microorganisms with straw degradation, potassium dissolving and growth promoting functions, and the complex microbial inoculant comprises the following strains: bacillus subtilis K15, curveolate Prickia L11 and bacillus mycoides L31. The complex microbial inoculant disclosed by the invention realizes synergistic interaction and functional complementation, and through scientific compounding of strains, the straw decomposition rate is remarkably increased, and the decomposition period is obviously shortened; the adaptive capacity and colonization competitiveness of microorganisms in a low-temperature and complex soil environment in winter are enhanced. The complex microbial inoculant disclosed by the invention also has multiple functions of degrading straws, dissolving potassium, producing IAA (Indoleacetic Acid) and the like. The soil potassium which is difficult to utilize can be converted into quick-acting potassium while the straws are quickly decomposed to release nutrients.

The invention belongs to the technical field of agriculture, and particularly provides a compound microbial agent and application thereof. The compound microbial agent is prepared from bacillus velezensis RKN1111, bacillus subtilis N-3 and paenibacillus mucilaginosus HX-02, and the compound microbial agent is prepared from bacillus velezensis RKN1111, bacillus subtilis N-3 and paenibacillus mucilaginosus HX-02, and the compound microbial agent is prepared from bacillus velezensis RKN1111, bacillus subtilis N-3 and paenibacillus mucilaginosus HX-02. The compound microbial agent can effectively improve the pH and EC of saline alkali soil, increase the content of alkali-hydrolyzable nitrogen, available phosphorus and quick-acting potassium in the soil, and play a significant role in increasing the plant height, stem diameter, chlorophyll content and aboveground biomass of corn plants in coastal saline-alkali soil.

The invention provides a biochar composite porous material for heavy metal contaminated soil remediation and a preparation method and application of the biochar composite porous material. The preparation method comprises the steps that biomass raw materials are subjected to high-temperature pyrolysis carbonization and then smashed, ground and sieved, and biochar powder is obtained; dispersing in a phosphoric acid solution to obtain a biochar solution, and filtering, washing and drying after a hydrothermal activation reaction to obtain activated biochar; dispersing in a chitosan solution, carrying out ultrasonic oscillation, filtering, washing and drying to obtain modified charcoal; mixing sodium bentonite, attapulgite and deionized water, uniformly mixing the modified charcoal, the functional slurry and a sodium carboxymethyl cellulose solution to obtain composite slurry, performing compression molding to obtain a green body, and then drying and calcining the green body. The biochar composite porous material prepared by the invention can simultaneously play multiple roles of physical adsorption, chemical chelation, ion exchange and the like in a heavy metal contaminated soil treatment process, so that efficient fixation of various heavy metal ions is realized.

The invention belongs to the technical field of soil improvement, and discloses a preparation method of a humic acid biochar saline-alkali soil conditioner. The preparation method comprises the following steps: by taking waste edible fungus chaff as a raw material, activating the waste edible fungus chaff with a KOH solution, pyrolyzing the waste edible fungus chaff under a limited oxygen condition to obtain fungus chaff-based biochar with a porous structure, mixing the fungus chaff-based biochar with humic acid, a sodion replacement material (desulfurized gypsum powder and / or calcium chloride) and purified water according to a certain mass ratio, and drying and fixing at medium temperature to obtain the modifier. According to the modifier, the porous adsorption performance of the biochar, the pH adjustment and agglomeration improvement functions of the humic acid and the sodium ion replacement capacity of the calcium source material are comprehensively exerted, the sodium ion content in the saline-alkali soil is synergistically reduced, and the soil agglomeration structure and the water and fertilizer retention capacity are improved. The prepared modifier is especially suitable for soil treatment of moderate and severe saline-alkali soil in which the ratio of sodium ions to exchangeable cations exceeds 10%, and has agricultural waste resource utilization and ecological restoration values.

The invention relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention discloses a sporosarcina sp. Strain RH34 and an application of the sporosarcina sp. Strain RH34 and the application of the sporosarcina sp. Strain RH34. The sporosarcina strain RH34 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation address is No.3, yard 1, Beichen West Road, Chaoyang District, Beijing, the preservation date is December 25, 2024, and the preservation number is CGMCC NO.33199. The sporosarcina strain RH34 can be used for preparing the sporosarcina strain RH34. The alfalfa rhizosphere microorganism sporosarcina strain RH34 is separated from alfalfa roots in salinized soil, and has the functions of dissolving organic phosphorus, dissolving inorganic phosphorus, producing biological membranes, producing siderophores, producing IAA and producing ACC deaminase. Seed soaking and germination under salt stress can obviously improve the germination index of alfalfa seeds. The growth condition of alfalfa seedlings can be improved under salt stress.

The invention discloses a composite conditioner for acid soil of slope cropland and application of the composite conditioner. The conditioner comprises the following components in percentage by mass: 12%-18% of calcium peroxide, 18%-32% of a buffer mineral compound, 1.5%-3.0% of an anti-scouring controlled-release material, 10%-25% of a nutrient carrier and fertilizer, 0.5%-3.0% of a binder and a granulation aid, and the balance of inert filler and water. The preparation process comprises the steps of dry mixing, granulation, drying and coating. The product provided by the invention can realize high residue of CaO and stable pH under the condition of heavy rainfall of slope cropland, effectively inhibit the pH fall of acid soil, reduce aluminum toxicity and reduce nutrient loss. By controlling the content and proportion of the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material, the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material have a synergistic effect in a slope cropland environment, so that not only is the initial rapid acid inhibition capability ensured, but also the lasting pH stability and high residual rate are realized through buffer and controlled-release technologies.

The invention belongs to the technical field of sandy soil reinforcement, and relates to a sandy soil reinforcement method combining modified chitosan film coating and cementation with biomimetic mineralization and application, the sandy soil reinforcement method comprises the following steps: S1, chitosan is subjected to swelling, alkalization, carboxymethylation and refining treatment to obtain modified chitosan; s2, respectively preparing a calcium chloride solution and a sodium carbonate solution with the same concentration; a calcium chloride solution is a cementing solution A; adding modified chitosan into a sodium carbonate solution, and uniformly stirring to form a cementing solution B; s3, the cementing liquid A is sprayed to the sandy soil, then the cementing liquid B is sprayed, and primary cementing is completed; carrying out circulating cementing for 5-20 times according to the spraying mode; and then air drying is conducted to complete sandy soil reinforcement. According to the invention, the agglomeration among calcium carbonate particles is enhanced by utilizing the cementing, film covering, mineralized crystal form adjusting and filling coupling effects of the modified chitosan, so that the calcium carbonate particles form effective cementing connection among sand particles, thereby improving the mechanical properties of the sand.

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.

The invention belongs to the technical field of biological mineral fertilizers, and particularly relates to a microbial liquid complex microbial inoculant with coal gangue activation and heavy metal treatment functions and a biological mineral fertilizer. The microbial liquid complex microbial inoculant is prepared from the following functional strains by using electrochemical low-Hertz water through sequential inoculation and fermentation in three stages: repair bacteria pseudomonas putida, nitrogen-fixing bacteria azotobacter chroococcum, growth-promoting bacteria azotobacter braziliensis, phosphate solubilizing bacteria pseudomonas fluorescens, biocontrol bacteria bacillus subtilis and potassium bacteria bacillus mucilaginosus. The silicolytic bacteria are bacillus megatherium; and the synergistic bacteria are trichoderma asperellum. The biological mineral fertilizer is prepared by using the microbial liquid complex microbial inoculant and using coal gangue powder as a main raw material. The scientific compatibility of different strains provided by the invention realizes the efficient improvement of the heavy metal polluted land and the yield increase of crops, changes the coal gangue into valuables, solves the problem of pollution caused by the accumulation of a large amount of coal gangue, and has important economic and social values.

The invention discloses streptomyces griseorubens and an application of the streptomyces griseorubens in phthalate pollution remediation. The bacterial strain is Streptomyces griseorubens FZ202, the preservation number of the bacterial strain is GDMCC No: 61372, the bacterial strain has good environmental adaptability and efficient degradation capacity, DEHP can be effectively degraded within 100-800 mg / L, the highest degradation efficiency can reach 94.1%, and complete degradation can be achieved. The strain is inoculated into PAEs contaminated soil and interacts with rice, DEHP residues in the soil and crop bodies can be effectively reduced, various PAEs can be synergistically degraded, and the strain has the broad-spectrum degradation characteristic. Meanwhile, through multiple mechanisms of degrading pollutants, promoting plant growth, improving the soil environment and regulating and controlling microbial communities, the strain remarkably improves the growth performance of rice and the self-cleaning capacity of soil, and has a wide agricultural application prospect.

The invention discloses a soil conditioner for saline-alkali soil and a preparation method and application thereof, and belongs to the technical field of solid waste resource utilization and soil improvement, the soil conditioner for saline-alkali soil comprises the following raw materials: coal gangue, ardealite and an auxiliary agent, and the mass ratio of the coal gangue to the ardealite to the auxiliary agent is (20-60): (20-60): (10-30). The preparation method comprises the following steps: drying and crushing the raw materials, uniformly mixing, mechanically activating or thermally activating the mixture, and screening to obtain the soil conditioner. According to the invention, the raw materials are subjected to synergistic activation treatment, so that the obtained soil conditioner achieves good effects in the aspects of increasing the content of effective silicon and adsorbing heavy metals, the problem that single performance is prominent and the other performance is obviously insufficient is avoided, and the improvement target of double-effect collaboration is achieved. And the soil conditioner not only can effectively supplement nutrient elements such as silicon in the saline-alkali soil, but also can remarkably adsorb and passivate heavy metals (such as cadmium, nickel, copper, lead and chromium), so that the soil fertility and the environmental safety are improved at the same time. Besides, solid wastes such as the coal gangue and the ardealite are used as main raw materials, so that the method has the advantages of low cost, high resource utilization rate, environmental friendliness and the like, and conforms to the green and sustainable development concept.

The invention belongs to the technical field of biological agents, and particularly relates to ginsenoside variant flavobacterium DG-16 and application thereof in relieving continuous cropping obstacles of angelica sinensis and improving the quality of the angelica sinensis. According to the ginsenoside variant flavobacterium DG-16 disclosed by the invention, the growth of angelica sinensis is promoted by increasing the contents of jasmonic acid and cytokinin hormones, reducing the contents of gibberellin and salicylic acid hormones and promoting the circulation and utilization of nitrogen; in addition, the flavobacterium ginsenoside variant DG-16 can significantly increase the chlorophyll content, is beneficial to photosynthesis of the angelica sinensis, effectively changes the physiological and biochemical states of the angelica sinensis, can resist root rot of the angelica sinensis so as to relieve successive cropping obstacles and improve the quality, and has a significant effect.

The invention discloses heavy metal resistant bacillus velezensis as well as a microbial remediation agent and application thereof. Bacillus velezensis DBS01 is screened from heavy metal contaminated soil in Dabaoshan mining areas in Shaoguan City, Guangdong province, is preserved in China Center for Type Culture Collection (CCTCC), has a preservation number of CCTCC M 20252228, not only has resistance to various heavy metals, but also can metabolize and secrete metabolites such as organic acid, cellulase and growth hormone in different growth stages, and can be used for preventing and treating various heavy metals. Multiple functions of curing heavy metals, dissolving phosphorus and potassium, promoting plant growth and the like are realized. According to the method, bacillus velezensis DBS01 is inoculated into a culture medium containing straw, calcium superphosphate, agar and sodium alginate are added, and a mixture containing the bacillus velezensis DBS01 is freeze-dried, so that the heavy metal contaminated soil in the mining area can be efficiently repaired in an environment-friendly manner at low cost, and the ecological function recovery of the soil is effectively promoted.

The invention belongs to the technical field of microorganisms, and relates to a strain of herbaspirillum as well as a fermentation method and application thereof. The invention provides a strain of brassica juncea, the brassica juncea is brassica juncea YLHb25.7, the brassica juncea is named as Herbaspiril huttiense, the brassica juncea is preserved in China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.35297. The invention also provides a preparation method of the brassica juncea. The herbispirillum sp. YLHb25.7 disclosed by the invention has the capabilities of producing ACC deaminase, producing IAA and fixing nitrogen, and has good drought resistance and saline-alkaline tolerance. The herbaspirillum sp. YLHb25.7 and the fermentation product thereof can promote the growth of wheat and corn, can be used as a microbial agent or bacterial fertilizer, and can be applied to the agricultural market.

The invention discloses a sodium alginate embedded iron-carbon microcapsule material for repairing cadmium and arsenic polluted soil and a preparation method of the sodium alginate embedded iron-carbon microcapsule material, and belongs to the technical field of soil heavy metal pollution repairing materials. The material comprises straw biochar, high-iron steel slag powder, a sulfydryl acetylated chitosan-iron monatomic cluster compound, a boron-doped graphitized carbon coated cobalt ferrite nanosheet, sodium alginate, calcium chloride and sodium carbonate. Wherein the sulfydryl acetylated chitosan is prepared by reacting chitosan with sulfydryl acetic anhydride, dialyzing and drying, and performing solvothermal reaction with ferric nitrate under high pressure. The preparation method comprises the following steps: pyrolyzing and drying the straw biochar, reacting the high-iron steel slag with sulfuric acid, adding the biochar, adjusting the pH value, adding sodium carbonate, mixing to obtain an iron-carbon-based passivation material, mixing with two modified compounds, mixing with a sodium alginate solution, dropwise adding a calcium chloride solution, and stirring and curing. The material can be applied to remediation of cadmium and arsenic polluted soil.

The invention discloses a salt-tolerant staphylococcus warneri strain WB224, and the preservation registration number of the salt-tolerant staphylococcus warneri strain WB224 is CGMCC No: 28260. The invention also discloses two applications of the strain WB224: 1, the strain WB224 is applied to thick broad-bean sauce flavored fermented foods (thick broad-bean sauce, chilli sauce and fermented soya beans); and 2, application in improvement of acid soil. The strain WB224 is obtained from a fermented food Pixian thick broad-bean sauce, the coagulase reaction is negative, the strain has the characteristics of strong stress resistance and high salt resistance, the formation of flavor substances such as esters and alcohols in the thick broad-bean sauce flavor fermented food can be obviously promoted, and the flavor of a product is effectively improved. Meanwhile, the acid soil with the pH value of 4.5-5.0 can be improved to a subacid environment with the pH value of 6.0-6.5; the effect is lasting and stable, and secondary pollution is avoided. The method has dual application values of food fermentation and soil improvement, so that the method has a wide industrial application prospect.

The invention discloses an efficient lithium slag solidification and stabilization agent and a preparation method thereof. The efficient lithium slag solidification and stabilization agent comprises the following raw materials in parts by weight: 20-50 parts of lithium slag, 5-10 parts of carbide slag, 8-12 parts of nano silicate, 6-12 parts of slag powder, 3-6 parts of hydroxyapatite, 2-5 parts of bentonite, 4-8 parts of fly ash and 1-3 parts of aluminum sulfate. The method disclosed by the invention has the advantage of environmental protection, and solves the problems that when the existing lithium slag is recycled, the lithium slag is inconvenient to solidify and stabilize, the lithium slag often contains heavy metals, and if the lithium slag is not fixed in a lattice structure through solidification and stabilization technologies, the heavy metals can be leached along with rainwater to enter soil and water, and long-term ecological pollution is caused.

The invention belongs to the field of edible fungus culture, and particularly relates to a method for reducing disease occurrence and increasing the yield of dictyophora rubrovolvata. According to the method, before planting, a rotary cultivator is used for ploughing soil, wood vinegar is sprayed, temperature and humidity are controlled after hyphae are put on the soil, wood vinegar is sprayed in the growth stage of bamboo eggs, and temperature and humidity are controlled until harvesting, so that the occurrence of diseases is reduced, and the yield of dictyophora rubrovolvata is increased. The invention provides a method for reducing diseases and increasing the yield of dictyophora rubrovolvata through measures of improving the pH value of soil, preventing soil caking, stimulating rapid growth of hyphae, stimulating twisting of the hyphae, reducing diseases and insect pests and the like. By means of the method, use of pesticides in the dictyophora rubrovolvata planting process can be reduced, the yield of dictyophora rubrovolvata is increased, and dictyophora rubrovolvata diseases are reduced.

The invention discloses bacillus velezensis B127 and application thereof, the bacillus velezensis is preserved in China Center for Type Microbiological Culture Collection, the preservation number is CCTCC NO: M 20252878, the preservation date is December 15, 2025, the classification name is bacillus velezensis B127, and the preservation address is Wuhan University, Hubei Province. The bacillus velezensis B127 has a remarkable inhibition effect on various tobacco fusarium pathogenic bacteria, has good phosphorus and potassium solubilizing capacity, generates hydrolase related to inhibition of pathogenic bacteria and generates siderophore and indoleacetic acid for promoting plant growth, is a biocontrol bacterium with excellent comprehensive performance, and can be widely applied to the field of biological control. The method has good development and application prospects in the fields of agricultural disease control, soil improvement, microbial fertilizers and the like.

The invention relates to the technical field of soil amendments, in particular to a soil amendment containing earthworm enzymatic hydrolysate and a preparation method of the soil amendment. The soil conditioner containing the earthworm enzymatic hydrolysate comprises the following components: earthworm enzymatic hydrolysate microcapsules and adjuvant particles in a mass ratio of (2-4): 1, the earthworm enzymatic hydrolysate is prepared by performing enzymolysis on fresh earthworm homogenate by compound enzyme, and the compound enzyme comprises cellulase and protease; the wall material of the earthworm enzymatic hydrolysate microcapsule comprises at least one of chitosan, calcium alginate, gelatin and Arabic gum; the auxiliary agent comprises humic acid and inorganic natural minerals. According to the soil conditioner containing the earthworm enzymatic hydrolysate, the earthworm enzymatic hydrolysate is wrapped by the microcapsules, the retention rate of active ingredients in the earthworm enzymatic hydrolysate can be remarkably increased, and the soil condition can be further improved by matching with humic acid and inorganic natural minerals for use.

The invention discloses a preparation method and application of an iron-manganese modified biochar material for remediation of cadmium and arsenic contaminated soil, and relates to the field of new materials.According to the material, rice hull biochar serves as a carrier, and the specific surface area and surface active sites are increased through programmed intermittent ball milling; and the Fe-O / Mn-O bonding modification complex is formed through gradient loading of iron and manganese oxides. The maximum adsorption capacity of the material to Cd < 2 + > and As (V) reaches 71.54 mg.g <-1 > and 49.30 mg.g <-1 > and is 1.65 / 2.53 times that of original biochar, the content of available Cd and As in soil is reduced by 8.98% and 25.2% under the condition that the addition amount is 0.4%, and the passivation efficiency is improved by 1.05 times (Cd) and 9.08 times (As) compared with that of non-ball-milled iron-manganese modified biochar; the material prepared by the method is applied to cadmium and arsenic polluted soil, pollution can be controlled by waste, and the soil can be effectively repaired.

The invention relates to the technical field of agricultural production, and discloses a salt-alkali-tolerant phosphorus-dissolving pesticide-reducing fungus YM-1 and application thereof in corn planting, the salt-alkali-tolerant phosphorus-dissolving pesticide-reducing fungus YM-1 is a purple blue bacterium, the preservation number of the strain is CGMCC No.42313, and the strain has multiple functions of resisting salt and alkali, dissolving insoluble phosphorus and degrading 2-methyl-4-chlorophenoxyacetic acid pesticide residues. The strain, a culture thereof or a microbial inoculum prepared from the strain are applied to agricultural production, and plant growth is promoted by exerting the composite biological function of the strain under saline-alkali stress. According to the invention, the synergistic effect of saline-alkaline tolerance, phosphate solubilization and pesticide degradation of the strain is utilized, so that the plant growth inhibition is relieved in the adverse situation, the soil phosphorus bioavailability is improved, the pesticide-polluted soil is repaired, and the plant seed germination, root development and plant growth are promoted. The strain has an important application prospect in the aspect of developing a microbial agent for saline-alkali soil improvement.

The invention discloses a preparation method of an iron-doped cerium-based perovskite type high-selectivity Cu ion capture stabilizing agent and application of the stabilizing agent in heavy metal pollution remediation, and the stabilizing agent is prepared through a sol-gel method and comprises the steps that cerous nitrate and citric acid are dissolved in water, and the mixture is heated and stirred to be gel-shaped; standing the gel solution in a drying oven at a constant temperature to obtain a Fe-Ce-PVSK precursor; grinding the precursor into powder, putting the powder into a quartz boat, and calcining in an air atmosphere through a horizontal tube furnace to obtain a product; and finally, washing to be neutral to obtain the iron-doped cerium-based perovskite stabilizing agent. Due to the high oxygen vacancy concentration and rich active sites, the stabilizing agent has high selectivity and high adsorption capacity and has specific capturing capacity on Cu < 2 + >. The preparation method has mild reaction conditions. The stabilizing agent can effectively reduce the bio-availability of heavy metals in a polluted matrix, promote healthy growth of plants, and realize pollution restoration and ecological function recovery at the same time.

A polyelectrolyte-surfactant complex, a method of removing a toxic substance from contaminated soil or contaminated groundwater using a polyelectrolyte-surfactant complex and a method of making a polyelectrolyte-surfactant complex. The polyelectrolyte-surfactant complex is made from a complexated recombinant intrinsically disordered protein that has been electrostatically conjugated to an anionic surfactant to provide enhanced liquid-liquid phase separation properties.

The invention relates to the technical field of polymer composite materials, and provides a composite water-retaining agent based on charcoal and bentonite as well as a preparation method and application of the composite water-retaining agent. The composite water-retaining agent provided by the invention is prepared from the following raw materials: acrylic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, acrylamide, sodium hydroxide, N, N '-methylene bisacrylamide, ammonium persulfate, modified bentonite and corn straw biochar. The composite water-retaining agent provided by the invention has excellent salt resistance, water holding capacity and structural stability, and the water absorbency in pure water and a 0.9% NaCl solution respectively reaches 2547.30 g / g and 164.45 g / g; when the soil conditioner is applied to saline-alkali soil, the maximum water holding capacity of the soil can be remarkably improved. The preparation process is simple, the cost is low, and the method has important practical significance on promoting ecological environment restoration of the arid mining area and realizing coordinated development of mineral resource development and environmental protection.

The invention discloses a trans-boundary synthetic flora (SMC) for preventing and treating wheat stem rot as well as preparation and application of the trans-boundary synthetic flora. The synthetic bacterial flora is prepared by compounding Trichoderma harzianum T19 with the preservation number of CCTCC (China Center for Type Culture Collection) No: M 20251896, bacillus subtilis BS-Z15 with the preservation number of CCTCC No: M 20251892, two strains of growth promoting bacillus PM9 and PM16, and two strains of auxiliary bacillus S8 and S32 according to a specific proportion. Compared with an existing single antagonistic bacterial agent, the synthetic flora disclosed by the invention has the advantages that the bacteriostasis rate of the synthetic flora on Fusarium pseudograminearum under a non-sterile soil condition can reach 70% or above, and the disease index is reduced by 70.01%; meanwhile, the plant height of wheat is increased by 28.63%, the root length is increased by 24.53%, the fresh weight is increased by 181.21%, the dry weight is increased by 184.64%, the thousand seed weight is increased by 10.39%, and the rhizosphere microbial community structure and the soil enzyme activity are remarkably improved. The method can be used for green prevention and control and yield increase of basal stem rot of wheat and other gramineous crops.

The application discloses a kind of multifunctional low-temperature degradation corn stalk composite microbial inoculant, preparation method and application, the composite microbial inoculant is compounded by multiple microorganisms with straw degradation, potassium solution and promoting function, comprising the following strains: bacillus subtilis K15, curvularia geniculata L11 and bacillus mycoides L31.The composite microbial inoculant constructed in the application realizes synergistic effect and functional complementation, through strain scientific compounding, straw decomposition rate is significantly improved, and decomposition period is obviously shortened;Enhance the adaptability and colonization competitiveness of microorganisms in winter low temperature and complex soil environment.The composite microbial inoculant of the application also has multiple functions such as straw degradation, potassium solution and IAA production, etc.At the same time of releasing nutrients by rapid decomposition of straw, it can convert difficult-to-use soil potassium into available potassium.

The present application belongs to the technical field of biochar oxygen-releasing materials, and particularly relates to a carbon-based calcium peroxide material with oxygen-releasing function, a preparation method and application thereof. Silicon-rich agricultural waste is converted into biochar through controllable pyrolysis, the pore structure of the biochar is regulated, mesoporous biochar is prepared, the mesoporous biochar is modified by phosphates to prepare phosphorus-rich biochar, and finally, the phosphorus-rich biochar is combined with calcium peroxide to obtain the carbon-based calcium peroxide material with oxygen-releasing function. The material has excellent oxygen-releasing performance and can continuously and stably release oxygen into the soil. Meanwhile, the phosphorus-rich biochar can also provide phosphorus nutrients to promote the growth of rice. The material can be widely applied to the improvement of gleyed paddy fields, effectively solves the problem of soil oxygen deficiency, improves soil fertility and rice yield, and has the characteristics of environmental protection, economy and high efficiency.