31 results about "Phanerochaete" patented technology

The invention belongs to the field of microorganisms, and particularly relates to a biochar-based immobilized microbial agent for promoting litter decomposition and a preparation method thereof.The biochar-based immobilized microbial agent for promoting litter decomposition comprises a biochar-based culture medium and a microbial seed solution, the active ingredient of the microbial seed solution is phanerochaete chrysosporium, and the preservation number is SHBCC D13411. According to the invention, the adsorption efficiency of the microbial agent is enhanced through the iron-modified biochar, and a habitat suitable for development and reproduction is provided for microorganisms; on the other hand, the biochar has very strong hygroscopicity, water molecules can be adsorbed on the surface, and a suitable growth environment is provided for microorganisms, so that the microorganisms are promoted to decompose litters.

The invention belongs to the technical field of biological materials, and particularly relates to a preparation method of a KOH activated fungal mycelium biochar / chitosan composite material. According to the preparation method disclosed by the invention, Phanerochaete chrysosporium mycelium is used as a carbon source, and KOH chemical activation and chitosan surface modification are sequentially carried out, so that the charcoal / chitosan composite material CHKBC is prepared. The CHKBC material prepared by the method is large in specific surface area, developed in pore structure, rich in mesopores and excellent in adsorption performance and regeneration performance; the specific surface area is up to 3650-3920m < 2 > / g, the average pore size is 2-4nm, and both the specific surface area and the average pore size are higher than those of precursor biochar and activated biochar; the maximum adsorption capacity of tetracycline TC is 650-690 mg / g, which is far higher than that of KBC and BC. After five times of recycling, the average regeneration efficiency is higher than 90%, and the regeneration performance is good.

The invention relates to the technical field of biology, in particular to a method and application of fungus-enzyme synergistic fermentation of bagasse pith, and the method comprises the following steps: (1) adjusting the water content of the bagasse pith to 60-70%, and adjusting the pH to 4.0; (2) adding the following components according to dry matter mass: 3% of phanerochaete chrysosporium liquid with the concentration of 1.5 * 10 < 8 > CFU / ml, and uniformly mixing; 1% of sucrose; the cellulase liquid is 20000U / kg, and the cellulase liquid is prepared by dissolving crude enzyme obtained by centrifuging after trichoderma hedgehog is fermented to produce enzyme in a PBS (phosphate buffer solution); and (3) putting the mixture into a fermentation tank, and performing sealed low-oxygen fermentation for 30 days to obtain the bagasse pith feed. According to the bagasse pith feed obtained by the method, the nutritional value of the bagasse pith can be improved, the fermentation quality is improved, the digestion potential is improved, the storage time is prolonged, and high-quality feed application of the bagasse is realized.

The invention discloses a preparation method of a slow-release fertilizer based on a silkworm excrement carrier simultaneously loaded with urea and a urease inhibitor. The method comprises the following steps: firstly, by taking silkworm excrement as a raw material, adding phanerochaete chrysosporium, aspergillus niger and bacillus subtilis complex microbial inoculants for fermentation; and fermenting at 30-35 DEG C for 3-4 days. After fermentation is finished, weighing the crushed fermented silkworm excrement, urea and a urease inhibitor according to the mass ratio of (6-7): 1: 0.08, adding water, and stirring and mixing, so that the urea and the urease inhibitor are fully loaded into a pore structure of the silkworm excrement; and drying and granulating to obtain the silkworm excrement-based slow-release fertilizer. And the loaded fertilizer realizes slow release of nitrogen by virtue of the synergistic effect of a silkworm excrement hydrogen bond polymerization structure and the urease inhibitor, has a remarkable effect on crops with long growth cycle and high nitrogen demand, and has both environmental protection and economic benefits.

The invention discloses a bagasse filter mud composting method based on synergistic interaction of sargassum fusiforme and a complex microbial inoculant. The method comprises the following steps: mixing a sugar manufacturing byproduct bagasse and filter mud according to a certain dry weight ratio, and adjusting the moisture and carbon nitrogen ratio; synchronously adding sargassum fusiforme powder and a compound microbial agent, wherein the microbial agent is prepared by compounding bacillus licheniformis and phanerochaete chrysosporium; the high-temperature period is maintained for not less than 7 days, the total fermentation period is about 45 days, and the matured compost and the fertilizer thereof are prepared. The sargassum fusiforme is used as a natural conditioner, so that the composition of nutrient substances can be optimized, nitrogen and water are preserved, and heavy metals are passivated; and the lignocellulose is specifically degraded by the complex microbial inoculants. Through the synergistic effect of the bagasse and the filter mud, the high-temperature period of the compost is remarkably prolonged, the nutrient loss is reduced, the decomposition degree and the environmental safety of a compost product are improved, and an efficient and environment-friendly new way is provided for high-value resource utilization of the bagasse and the filter mud.

The invention discloses a microbial agent for increasing manure compost temperature and application thereof in high-temperature compost, and belongs to the field of agricultural solid waste treatment. The microbial agent for increasing the manure composting temperature comprises phanerochaete chrysosporium, bacillus stearothermophilus, penicillium oxalicum, streptomyces, common thermoactinomycetes and bacillus subtilis. The livestock padding manure high-temperature clean composting technology is established through adjustment and optimization, the purposes that the temperature of the padding manure is increased fast, the high-temperature period is long, the composting period is shortened, base materials are fully degraded are achieved, reference can be provided for resource utilization of livestock and poultry breeding solid waste, and important application value is achieved.

A Stevia rebaudiana residue fermented feed additive for improving livestock and poultry productivity, a preparation method therefor, and a use thereof. Raw materials of the Stevia rebaudiana residue fermented feed additive comprise: Stevia rebaudiana residue, fermented brown sugar, a microbial agent, and water. The microbial agent is composed of EM bacteria, white rot fungus and Phanerochaete chrysosporium, in a ratio of 1:1:1.

The invention relates to the technical field of soil improvement, in particular to a soil conditioner for improving desert saline-alkali soil and application of the soil conditioner. The soil conditioner is prepared from 5.5 to 7.5 * 10 < 4 > kg of yellow water, 5 to 6 * 10 < 3 > kg of crop straw, 60 to 76 kg of phanerochaete chrysosporium, 50 to 60 kg of bacillus amyloliquefaciens J10, 30 to 46 kg of trichoderma viride, 30 to 50 kg of lactobacillus kefir CP423, 1 to 1.2 * 10 < 4 > kg of organic fertilizer, 0.8 to 1.2 * 10 < 3 > kg of amino acid water-soluble fertilizer, 25 to 35 kg of nitrogen fertilizer and 8 to 12 kg of phosphate fertilizer. After the soil conditioner is applied to ecological improvement, the content of organic matter, total nitrogen, total phosphorus, alkali-hydrolyzable nitrogen and available phosphorus can be effectively increased, the soil quality is remarkably improved, and the yield and quality of planted crops can be remarkably improved.

The invention belongs to the technical field of rice planting, and particularly relates to a rice planting method for reducing soil microplastic pollution. By applying the soil conditioner, the pea crop rotation, the compost treatment and the specific irrigation strategy, the soil micro-plastic pollution can be effectively reduced; the pea plants can enrich micro-plastic particles in the soil through root exudates and self metabolic activities to a certain extent, and the pea plants are subsequently composted, so that the micro-plastic particles enriched in the pea plants can be further degraded; biochar in the soil conditioner can adsorb micro-plastic particles, the free state of the micro-plastic particles in soil is reduced, and the phanerochaete chrysosporium, the rhodococcus fence celebrating and the trichoderma harzianum can synergistically degrade the micro-plastic particles; the dry-wet alternate cycle treatment can further reduce the absorption of the rice plants to the micro-plastics, can promote the development of rice roots and the absorption of nutrients, and improves the stress resistance of the rice.

The invention discloses an efficient lignocellulose degradation compound strain and application thereof in producing methane by fermenting straws. The lignocellulose degradation compound strain is prepared from phanerochaete chrysosporium, oyster mushroom, phoenix mushroom and talaromyces pinophilus. When the composite strain is used for pretreating straws, the degradation rate of cellulose in the straws reaches 77.86%, the degradation rate of hemicellulose in the straws reaches 21.01%, and the degradation rate of lignin in the straws reaches 34.85%; when the pretreated straw and the excrement are subjected to anaerobic fermentation together, compared with a control group, the total gas production rate is increased by 86.28%, and the methane production rate is increased by 98.95%. Therefore, the invention provides a green and efficient straw resource utilization technology so as to synchronously realize the purposes of waste reduction, energy recovery and fermentation residue resource utilization.

The invention provides a rabbit manure organic fertilizer and a preparation method thereof, and the rabbit manure organic fertilizer is prepared by using rabbit manure, rapeseed meal and wheat straw as raw materials through fermentation with a complex microbial inoculant; wherein the complex microbial inoculant is prepared by mixing a phanerochaete chrysosporium bacterial liquid, a bacillus subtilis bacterial liquid and a Thermus thermophilus bacterial liquid. Furthermore, the rabbit manure organic fertilizer is prepared by fermenting the complex microbial inoculant provided by the invention, the degradation of cellulose substances can be remarkably promoted, and the prepared fertilizer has a relatively high seed germination index when being used for germinating seeds. In addition, after fermentation, the content of copper and zinc in a water-soluble state and a weak acid extraction state in the raw materials is reduced, the risk that plants absorb heavy metals is reduced, and the application safety of the organic fertilizer is improved.

The application discloses a kind of for decomposing forest litter composite microbial inoculant, preparation method and its application method, it is related to litter decomposition technical field.The application includes a kind of for decomposing forest litter composite microbial inoculant preparation method, comprising the following steps: S1.to Phanerochaete chrysosporium, Trichoderma reesei and ropegillus catenulatum are respectively carried out directional metabolism preactivation;S2.the three preactivation wet bacteria bodies obtained in step S1 are mixed according to the fresh weight ratio of Phanerochaete chrysosporium:Trichoderma reesei:ropegillus catenulatum 3:2:1, obtain mixed bacteria body;S3.mixed bacteria body is mixed with the straw carrier that is preprocessed by steam explosion according to the mass ratio of bacteria body fresh weight:carrier dry weight 1:2, under the condition of temperature 28 DEG C, relative humidity 92~95%, stationary culture 72 hours, carry out phased micro-perturbation aeration, construct physical symbiosis;S4.the material obtained in step S3 is dried to 15% moisture content at 40 DEG C, obtain composite microbial inoculant;Efficient and stable decomposition of pine forest litter is realized.

The present application relates to a kind of active sludge treatment dichlorophenol wastewater method, it is related to wastewater treatment technical field.The present application includes the following steps: (1) domestication of active sludge: adding bacterial body to active sludge, obtain mixed active sludge;Afterwards, mixed active sludge is added to domestication culture solution, domestication is obtained, and domesticated active sludge is obtained;(2) the treatment of dichlorophenol wastewater: domesticated active sludge is mixed with the dichlorophenol wastewater to be treated, and the treatment of dichlorophenol wastewater is realized;Wherein, the bacterial body used is the mixed bacteria of yellow phanerochaete chrysosporium and corynebacterium glutamicum.The present application can realize the efficient degradation of dichlorophenol, further guarantee the degradation effect of TOC in wastewater, the degradation product is safe, and it has the significant advantage of low energy consumption.

The present application belongs to the technical field of contaminated soil remediation, and relates to an ecological activation remediation material for heavy metal contaminated soil and a preparation method thereof, comprising: obtaining biochar by anaerobic pyrolysis, crushing and sieving of corn stalks; obtaining modified biochar wet material by dispersing the biochar in a modified solution, mixing, stirring and heating; obtaining a bacterial suspension by inoculating Burkholderia into LB liquid medium, oscillation culture, centrifugation and resuspending the bacterial body with a protective agent solution; obtaining a spore suspension by inoculating Phanerochaete chrysosporium into a potato glucose agar plate and static culture; obtaining a mixed suspension by mixing the modified biochar wet material, the bacterial suspension and the spore suspension with a sodium alginate solution, and obtaining gel microspheres by dropping the mixed suspension into a calcium chloride solution and taking out and drying. The ecological activation remediation material prepared by the present application can efficiently fix heavy metals, enhance the survival time and long-acting effect of microorganisms in the soil, and promote the recovery of the ecological function of the soil.

The invention discloses a siderophore-mediated symbiotic degradation bacterial agent for remediation of petroleum hydrocarbon contaminated soil. The microbial agent is formed by compounding a high-yield siderophore bacterium pseudomonas aeruginosa DG-1 with the strain preservation number of CGMCC (China General Microbiological Culture Collection Center) No.28382 and a fungus white rot fungus BNCC336258 according to the volume ratio of 1: (2 to 4), and through the siderophore-mediated bacterium-fungus synergistic metabolism effect, the remediation efficiency of the petroleum hydrocarbon contaminated soil under the iron limiting condition (the free iron concentration is smaller than or equal to 1.0 * 10 <-18 > M) is improved. The microbial agent is suitable for treating low-concentration polluted soil with the petroleum hydrocarbon concentration of 0.5-5 wt%, and the total petroleum hydrocarbon removal rate after remediation can reach 80% or above.

The invention discloses a culture method for inducing mycelia to secrete specific extracellular polymeric substances and application of the culture method in sand stabilization, and relates to the field of biotechnology and environmental materials.The culture method comprises the following steps that phanerochaete chrysosporium is inoculated into a liquid fermentation culture medium, and fermentation is conducted under the conditions that the pH ranges from 4.5 to 5.5, the temperature ranges from 35 DEG C to 37 DEG C and shaking culture is conducted; the liquid fermentation culture medium contains tween-80 with the concentration of 0.5-4 g / L and hydrogen peroxide with the concentration of 0.05-0.15 mM as an inducer combination; after the fermentation is finished, separating to obtain fermentation supernate, namely the functional extracellular polymeric substance fermentation liquor; according to the culture method for inducing the mycelium to secrete the specific extracellular polymeric substance and the application of the culture method in sand stabilization, the functional EPS is obtained from the source of regulating and controlling microbial metabolism, and the limitation that a traditional mycelium material only depends on the physical form is broken through.

The invention provides a preparation method of loropetalum chinense extract and application of the loropetalum chinense extract in preparation of products for wound healing, and relates to the technical field of traditional Chinese medicine extraction. The preparation method comprises the following steps: mixing a loropetalum chinense raw material, water and composite biological bacteria, and carrying out enzymolysis to obtain an enzymolysis product; the composite biological bacterium is a mixture of phanerochaete chrysosporium and streptomyces griseus; carrying out gradient alcohol extraction on the enzymolysis product, merging alcohol extracts, extracting with petroleum ether, and concentrating an organic phase to obtain a component 1; the component 1 is adsorbed by macroporous adsorption resin, the resin is washed with deionized water and then eluted with an eluent, 5-35 min eluent is collected, combined and dried, and the component 1 is obtained. The elution phase is a mixture of cyclohexane, ethyl acetate and acetonitrile. The loropetalum chinense extract is prepared through a specific preparation method, and the wound healing effect is remarkably improved.

This invention provides a solid-state fermentation inoculant, its preparation method, and its application. The preparation method of the solid-state fermentation inoculant involves inoculating *Phanerochaete chrysosporium* into a seed carrier and culturing it in a sterile, pure oxygen environment. Under pure oxygen conditions, the inoculated *Phanerochaete chrysosporium* exhibits a significantly increased reproduction rate, forming a high-density microbial community. Simultaneously, the continuous and stable nutrient supply from the seed carrier enables the inoculant to quickly establish a competitive advantage upon entering materials containing other microorganisms. By seizing nutrients and oxygen resources, it inhibits the growth and reproduction of other microorganisms, ultimately increasing the abundance of white-rot fungi in the fermented product, thereby enhancing the degradation efficiency of petroleum hydrocarbons in the soil. Compared to traditional solid-state fermentation methods, the inoculant production process is very simple and low-cost. The solid-state fermentation inoculant product of this invention has a high microbial density and a relatively large number of target strains, resulting in higher efficiency in soil pollution remediation and increased soil fertility.

The invention belongs to the technical field of microorganisms, and particularly relates to a complex microbial inoculant, a preparation method and application. The preparation method comprises the following steps: selecting an anaerobic bacillus tubingensis YZ-438 (C4) strain with the preservation number of CDMCC66915 and a phanerochaete chrysosporium YZ-460 strain with the preservation number of GMMCC5.776, inoculating the anaerobic bacillus tubingensis YZ-438 (C4) strain with the preservation number of CDMCC66915 and the phanerochaete chrysosporium YZ-460 strain with the preservation number of GMMCC5.776 into a carrier, and mixing and compounding to obtain the composite microbial inoculant, so that the composite microbial inoculant has good air permeability and flexibility due to the pore structure of the carrier buckwheat hull; the mass transfer efficiency and the adsorption effect of oxygen molecules can be improved through synergistic interaction; when the complex microbial inoculant is applied to degradation of compost and agricultural and forestry waste, the enzyme activity and high temperature resistance of the compost and the agricultural and forestry waste can be effectively improved, synergistic complementation on degradation of lignin, cellulose and hemicellulose is achieved, and the degradation efficiency of the lignin, the cellulose and the hemicellulose is high. In the mixing application of vinasse and straw, the temperature can be rapidly increased, and the temperature can be kept at 60-80 DEG C or above for 2 weeks.

The invention discloses a compound microbial fertilizer with root-promoting and seedling-strengthening effects and a preparation method thereof, and belongs to the technical field of microbial fertilizer preparation. Comprising the following steps: adding phanerochaete chrysosporium, azotobacter, bacillus mucilaginosus and bacillus megatherium into a TSB liquid culture medium, and culturing to obtain a fermented spore suspension; mixing platycodon grandiflorum, plant ash and purified water to obtain a base material; inoculating the fermentation spore suspension into a base material, and fermenting to obtain a base fertilizer; the preparation method comprises the following steps: adding pichia kudriavzevii, bacillus licheniformis and trichoderma harzianum into a TSB liquid culture medium, and culturing to obtain an antibacterial spore suspension; inoculating the antibacterial spore suspension into a base fertilizer, and fermenting to obtain a base fertilizer; mixing a monopotassium phosphate solution, a dipotassium phosphate solution and fetal calf serum to obtain a flora protection solution; mixing and drying the flora protection liquid and the base fertilizer to obtain the compound microbial fertilizer. The number of viable bacteria in the compound microbial fertilizer is increased, and then the root-promoting and seedling-strengthening effects of the compound microbial fertilizer are improved.

The invention discloses a process for extracting bamboo fibers through a biological method and application of the process, and relates to the technical field of bamboo fiber extraction.The process comprises the following steps that firstly, ultrasonic treatment is conducted, specifically, bamboo wood is pretreated through ultrasonic waves, and fiber cell walls are displaced, deformed and fiberized through the cavitation effect; and secondly, biological treatment is conducted, specifically, white rot fungi, brown rot fungi or soft rot fungi are adopted for conducting biodegradation on the bamboo wood subjected to ultrasonic treatment, and the white rot fungi comprise phanerochaete chrysosporium. No chemical agent is added in the whole production process, black liquor pollution generated by traditional chemical pulping is thoroughly avoided, production water recycling is achieved, the water consumption is only 10% of that of a traditional chemical pulping process, emission of COD, BOD and suspended solids SS is avoided, lignin, starch and the like are decomposed into H2O and CO2 by fungi, and environmental pollution is avoided. And the waste residues can be used for preparing biochemical feeds, organic fertilizers and edible fungus base materials, so that resource utilization is realized.

This invention discloses an MBR reactor, belonging to the field of wastewater treatment technology. The MBR reactor of this invention includes an aerobic zone and a membrane module. Aerobic sludge is added to the aerobic zone, and the membrane module has a membrane. Functional mycelial balls are inoculated onto the aerobic sludge. The membrane contains inorganic particles. The method for preparing the functional mycelial balls includes: a) providing a mixed spore suspension of Aspergillus niger and Phanerochaete chrysosporium, adding biodegradable polymer particles, and culturing; b) adding a mixed bacterial suspension of Bacillus belye and Bacillus argentis to the mixed spore suspension, and culturing again. The main purpose of this invention is to reduce membrane fouling, improve the self-cleaning performance of the membrane, and increase the removal efficiency of pollutants such as residual antibiotics in wastewater.

The present application belongs to the technical field of waste conversion fertilizer, and provides a kind of compound organic fertilizer and its preparation method, the method steps are as follows: S1, by weight, rice straw 27-30 parts, bran 9-10 parts and animal manure 8-9 parts are mixed to obtain initial raw material;S2, 0.85-0.9 parts of oxidized modified straw biochar and 0.5-0.55 parts of ammoniated superphosphate are added into the initial raw material at the same time and mixed, and then the moisture content is adjusted to 53±3%, to obtain the base material;S3, add phanerochaete chrysosporium suspension and bacillus subtilis activation solution to the base material and mix evenly to obtain fermentation material;S4, the fermentation material is composted and fermented for more than 28 days to obtain the compound organic fertilizer.The present application shortens the composting time to improve the preparation efficiency of organic fertilizer, and further reduces the phytotoxicity of the prepared organic fertilizer.

The application discloses a kind of biochar microbial activity soil conditioner and preparation method thereof, belong to microbial technical field.The conditioner of the application is prepared from the following weight parts of raw materials: modified sludge biochar 40-80 parts, peanut shell 10-20 parts, humic acid 10-20 parts, urea 5-10 parts, ammonium dihydrogen phosphate 5-10 parts, attapulgite 5-10 parts, microbial inoculant 1-4 parts, conditioner 0.1-0.5 parts.The sludge biochar of the application is prepared from municipal sludge as raw material, and the physical and chemical properties of sludge biochar are fully improved through steps such as drying pyrolysis modification, and the adsorption capacity of heavy metal ions is improved;The application compounding rose color kock's bacteria and thick hair flat leather fungus as functional microbial inoculant, synergistic effect, realize the effective fixation and degradation to common heavy metal elements in soil, make heavy metal into stable form to reduce migration and biological availability.

The invention discloses a method for preparing a humic acid fertilizer synergist based on biological-chemical activated weathered coal, and relates to the technical field of humic acid fertilizer synergists. The method comprises the following steps: mixing bacillus subtilis, trichoderma harzianum and phanerochaete chrysosporium stock seeds to obtain a complex microbial inoculant, and activating the weathered coal by using the complex microbial inoculant to obtain biologically activated weathered coal; mixing the biologically activated weathered coal with potassium hydroxide and paper pulp lignin liquid, and performing chemical solid-phase activation under a heating condition to obtain an activated product, namely the humic acid fertilizer synergist. Through synergism of biological activation and chemical activation, the content of humic acid, organic matters and fulvic acid in the humic acid fertilizer synergist can be obviously increased, so that growth and development of rape are facilitated. Moreover, the weathered coal is activated by adopting the paper pulp lignin liquid, and meanwhile, the resource utilization of the paper pulp lignin liquid and the high-order conversion of the weathered coal are realized, so that the method has great practical significance.

The application relates to the technical field of agricultural solid waste resource utilization, and discloses a composite microbial inoculum for fertilizer preparation of multi-source agricultural and forestry organic waste and a preparation method thereof, which comprises the following steps: the composite microbial inoculum is prepared from D-anhydrous glucose, an induced mesoporous carrier dispersion liquid, veratryl alcohol, urea, a phanerochaete chrysosporium seed liquid, a trichoderma reesei seed liquid and a bacillus licheniformis seed liquid. Two-stage time sequence fermentation is adopted during preparation, fungi are inoculated and cultured first, then bacteria are inoculated and urea is added. Ammonia produced by bacterial catalysis is used to drive the spontaneous increase of the pH of a fermentation system, trigger the in-situ crystallization of precursor ions, and build a multi-level layered coating configuration with a porous diatomite skeleton in the inside, an alkali lignin planting layer in the middle layer, and an ammonium magnesium phosphate crystal armor layer in the outer layer. The application effectively blocks interspecific competition during co-culture, endows the microbial inoculum and degradation enzyme system with excellent mechanical shear resistance, can provide long-acting acid-alkali buffering and precise nutrient release in the complex environment of composting, and improves the waste degradation efficiency.

The invention relates to the technical field of environmental microorganisms, and discloses a method for directionally synthesizing high-activity humus based on a microorganism co-culture system.The method comprises the steps that firstly, a co-culture flora composed of phanerochaete chrysosporium, bacillus subtilis and agrobacterium tumefaciens according to a specific proportion is constructed; and then inoculating into the pretreated agricultural wastes, and carrying out two-stage temperature-controlled fermentation: in the first stage, carrying out low-temperature aerobic promotion on hydrolysis to produce acid, and in the second stage, carrying out heating micro-aerobic drive on oxidative polymerization. Through the orientation process, the lignocellulose raw material can be efficiently converted into high-activity humus within 12 days. Through the synergistic effect of functional flora and accurate control of physical conditions, directional rapid synthesis of humus is achieved, the total content of humus in the obtained product is high (> = 25%), the ratio of humus to humus is appropriate (1.5-2.0), the biological activity is high (the seed germination index is > = 120%) and is far better than that of a traditional compost product, and a new technology is provided for high-value utilization of agricultural waste and soil improvement.

The invention belongs to the technical field of agricultural planting, and particularly relates to a straw returning method capable of achieving greenhouse gas emission reduction. According to the specific technical scheme, the straw decomposing microbial agent comprises microbial preparations, and the microbial preparations comprise bacillus subtilis, trichoderma harzianum and phanerochaete chrysosporium. When the straw decomposing microbial inoculum is used for composting, the temperature can be quickly increased, the composting efficiency is improved, lignin in the straw can be degraded to 60% or above after composting is carried out for 20 days, and harmful microorganisms and weed seeds in the straw can be effectively killed. By using the microbial agent disclosed by the invention, short-term and in-situ rapid composting can be realized; and the compost can be quickly returned to the field in situ. The yield of crops is guaranteed, and meanwhile the emission amount of greenhouse gas is effectively reduced.

This invention discloses a siderophore-mediated symbiotic degradation agent for the remediation of petroleum hydrocarbon-contaminated soil. This agent is composed of *Pseudomonas aeruginosa*, a high-side-producing bacterium. Pseudomonas aeruginosa DG-1, strain preservation number CGMCC No. 28382) and the fungus white rot fungus ( Phanerochaete chrysosporium BNCC336258 is formulated in a volume ratio of 1:(2-4) and enhances iron-limiting conditions (free iron concentration ≤1.0×10⁻⁶) through siderophore-mediated bacterial-fungal synergistic metabolism. ‑18 The remediation efficiency of this microbial agent on petroleum hydrocarbon-contaminated soil (M) was demonstrated. This agent is suitable for treating low-concentration contaminated soil with petroleum hydrocarbon concentrations of 0.5-5 wt%, achieving a total petroleum hydrocarbon removal rate of over 80% after remediation.

The invention provides a straw and livestock manure synergistic composting microorganism strengthening process which comprises the following steps: S1, straw fine pretreatment: crushing straws, preparing trichoderma reesei and phanerochaete chrysosporium into a compound bacterium suspension, spraying the compound bacterium suspension onto the straws, and uniformly mixing by using a stirrer to obtain pretreated straws, covering a breathable film for pre-fermentation to obtain pre-fermented straws; s2, degradation efficiency detection: sampling on the 5th day of pre-fermentation, and carrying out acid hydrolysis detection; s3, preparing large straw blocks; s4, preparing a complex microbial inoculant; s5, mixing and composting: mixing the pre-fermented straws, large straws, livestock and poultry manure and a complex microbial inoculant according to a mass ratio of 8: 1: 10: 2 to construct a pile body, and covering the pile body with a breathable film; s6, temperature monitoring; S7, decomposition degree detection: taking a proper amount of samples, and detecting CO2 release amount, pH, seed germination index, total nutrients and organic matters of the samples; the method has the effects of shortening the composting period, reducing the composting efficiency and reducing the carbon emission.