510 results about "Rice straw" patented technology

The present invention relates to the technical field of pesticides, and discloses a biological agent-based rice sheath blight disease efficient control agent, which comprises an active flora, a carrier, an auxiliary agent and a disease resistance enhancing factor, the active flora is used for combining humidity, pH and temperature response type materials so as to make the bacterial agent dynamically released, and the disease resistance enhancing factor is used for controlling the disease resistance of the rice sheath blight disease. The carrier is used for enabling the active ingredients to be slowly released in a field environment and keep stability, the auxiliary additive is used for improving the activity, adhesiveness and soil adaptability of the fungicide, and the disease-resistant enhancing factor is used for expanding and improving the adaptability of the control agent. The ratio of the active flora to the carrier to the auxiliary additive to the disease-resistant enhancing factor is 10: 50: 13: 27. Through the synergistic effect of various functional strains and the combination of the dynamic release carrier, the occurrence and propagation of the rice sheath blight disease are effectively inhibited, the prevention and treatment rate can reach 75-85%, and the prevention and treatment effect is obviously higher than that of a traditional chemical pesticide or a single fungicide.

The invention discloses a rice straw decomposition process full life cycle monitoring system based on a cloud platform, and relates to the field of agricultural informatization, and the system comprises a field data collection terminal which is used for collecting near infrared spectrum data, image data and operation and environment data of a straw decomposition process; the layered identification and modeling unit is used for identifying initial mass proportions and decomposition progress of soluble components, cellulose components, hemicellulose components and lignin components of the straws, and establishing a layered progress bar; the fusion progress calculation unit is used for weighting each layered progress bar based on the initial mass ratio to generate an overall decomposition progress bar; the progress output unit is used for simultaneously outputting a layered progress bar and an overall decomposition progress bar; and the mode mining unit is used for clustering the historical layered progress bars, forming a progress category prototype library and outputting potential blocking reasons. The problems that the field straw decomposition process is difficult to monitor in real time and the blocking reason is difficult to identify are solved.

The invention relates to a building element (1) with a rectangular wooden frame (2) having four wooden frame beams (4) which, when the building element (1) stands vertically on a horizontal base (3), form a vertical left frame beam (4l), a vertical right frame beam (4r), a horizontal upper frame beam (4o) and a horizontal lower frame beam (4u), and with at least one wooden support beam (5) which is arranged in the wooden frame (2) such that it extends between the left frame beam (4l) and the right frame beam (4r) from the lower frame beam (4u) to the upper frame beam (4o), wherein the respective support beam (5) is fastened to the adjacent vertical beams (4, 5) by means of a plurality of wooden connecting rods (6) which extend horizontally when the building element (1) is standing. Improved stability can be achieved by forming several compartments (7) filled with straw (8) in the wooden frame (2), the straw (8) being compressed in the respective compartment (7).

The invention discloses streptomyces DLS188 and application thereof, and belongs to the technical field of microorganisms. The preservation number of the strain is CGMCC (China General Microbiological Culture Collection Center) No.33250. The strain is high in humic acid production capacity when being used for fermenting lignocellulose, and the strain is used for fermenting rice straw powder and wheat bran to prepare DLS188 bacterial fertilizer. After the DLS188 bacterial fertilizer is added into soil and wheat is sown, agronomic characters such as the plant height, the leaf length and the leaf number of the wheat can be remarkably promoted. Research on the soil after wheat sowing is completed shows that the addition of the DLS188 bacterial fertilizer significantly changes the microbial community of the soil, increases the diversity and abundance of the microbial community, and increases the content of humus in the soil. It is further shown that the DLS188 bacterial fertilizer is beneficial to adjustment of the soil microbial community structure and can be used for soil improvement. And the method has important significance for realizing resource utilization of agricultural straws.

The invention relates to the technical field of sewage treatment, in particular to a method for improving the denitrification nitrogen removal performance of a corn or rice straw fermentation carbon source by using industrial glucose. According to the method, the straws are soaked and pretreated by adopting calcium peroxide, and meanwhile, in the anaerobic fermentation process, the anaerobic condition is kept through nitrogen, and zero-valent iron is added to obtain the straw fermentation liquor. Fermentation liquor and industrial glucose are mixed to serve as a composite carbon source, the activity of microorganisms in a sludge system is stimulated through the usability of the glucose, and the utilization rate of the microorganisms to the rice and corn fermentation liquor carbon source is increased; anaerobic fermentation conditions of rice and corn straws are optimized, the carbon source release rate is increased, the complexity of carbon source composition of fermentation liquor is utilized, the diversity of microorganisms is improved, excessive propagation of the microorganisms is avoided, and the biological denitrification capacity is improved. The method disclosed by the invention is beneficial to resource utilization of agricultural wastes, reduces the biological denitrification cost of sewage with a low carbon-nitrogen ratio, and promotes green and low-carbon development of sewage treatment.

The invention discloses an acid contaminated soil carbon emission reduction method based on a coupled ecological system, which comprises the following steps: adding rice straw biochar into acid contaminated soil, planting plants which are perennial ryegrass, and after the plants are cultivated to a mature period, strengthening the photosynthesis capability of the plants and the carbon sequestration capability of the soil at the same time, so as to improve the carbon sequestration capability of the acid contaminated soil. The negative increase of the CO2 emission cumulant and the remediation of the acidic polluted soil are realized. According to the method, the emission cumulant of CO2 in the acid polluted soil is greatly reduced, the total absorption amount of CO2 reaches up to 193.41 g / m < 2 >-304.41 g / m < 2 >, and the method has the advantages that raw materials are low in cost and easy to obtain, operation is easy, the operation cost is low, secondary pollution is avoided, and the method is suitable for large-scale use and has wide application prospects in the field of carbon emission reduction of the acid polluted soil (such as heavy metal pollution).

The invention relates to the technical field of crop straw treatment and soil improvement, in particular to a rice straw returning method for improving soil fertility, which mainly comprises the following steps: crushing rice straws, soaking with a sodium hydroxide solution, and drying; then selecting specific strains, mixing and fermenting to prepare a microbial agent; preparing a composite additive in proportion; within 1-2 days after the rice is harvested, the pretreated straw, the microbial agent and the composite additive are applied to the field, deep ploughing is conducted, and irrigation is conducted; and finally, performing rotary tillage and soil preparation after straw decomposition, and monitoring and adjusting the pH value of the soil when next-stubble crops are planted. According to the method, straw is pretreated, lignin is destroyed through a sodium hydroxide solution, the particle size is accurately controlled, drying is conducted in cooperation, the microbial decomposition efficiency is improved, straw and soil are fully mixed through accurate ploughing in the field, decomposition is accelerated into nutrients, the straw can be powerfully decomposed through a microbial agent, and the soil micro-ecology is improved; the composite additive supplements various nutrients and enhances the water and fertilizer retention capability of soil.

The invention discloses a cultivation material for increasing the content of B vitamins of straw mushrooms and application of the cultivation material in straw mushroom cultivation. The cultivation material is formed by mixing and fermenting the following components in percentage by weight: 52-72% of pilose antler mushroom dregs, 10-20% of rice straws, 15-25% of waste cotton and 3% of lime. The contents of vitamin B3, vitamin B5, vitamin B6 and vitamin B12 in the volvariella volvacea sporocarp cultivated by adopting the cultivation material disclosed by the invention are obviously increased, the nutritional value of the volvariella volvacea is increased, and the market competitiveness and economic benefits of products are greatly enhanced. The pilose antler mushroom residues are used for replacing part of waste cotton raw materials, the production cost is reduced, meanwhile, efficient recycling of agricultural waste is achieved, and the method is suitable for large-scale industrial production.

The invention relates to the technical field of edible mushroom cultivation, in particular to a culture medium for cultivating stropharia rugoso-annulata and a preparation method and application thereof. The culture medium for cultivating the stropharia rugoso-annulata is prepared from the following components: rape straw, soybean meal, rice chaff, pepper straw, rice straw, loofah sponge, livestock and poultry manure, corncob, sawdust, calcium lignosulphonate and gypsum powder. The time from sowing to fruiting is 40-55 days by adopting the stropharia rugoso-annulata culture medium provided by the invention, and the fruiting time is obviously shortened compared with that of a contrast. By adopting the culture medium for cultivating the stropharia rugoso-annulata, the average yield of the stropharia rugoso-annulata reaches 8.15-8.64 kg / m < 2 >, and compared with a contrast, the average yield of the stropharia rugoso-annulata is remarkably improved. Therefore, the oilseed rape straw, the soybean meal, the rice chaff, the pepper straw, the rice straw, the loofah sponge and the calcium lignosulphonate are compounded, the fruiting time of the stropharia rugoso-annulata is shortened, and the yield of the stropharia rugoso-annulata is increased.

The invention discloses Aspergillus sp. DLF18 and application thereof, and relates to the technical field of microorganisms, and the preservation number of the Aspergillus sp. DLF18 is CGMCC (China General Microbiological Culture Collection Center) NO.41737. The strain can effectively utilize rice straws and / or bagasse to produce humic acid, and the content of humic acid in each gram of fermentation supernatant after the rice straws are fermented is 16.5%. When the DLF18 fermentation product is applied to crops, the growth condition of the crops can be remarkably improved, and the humus content in soil is increased. Meanwhile, a metagenomics analysis result shows that compared with a control group, after the DLF18 is applied into the soil, the species beta diversity is remarkably changed, and the functional gene abundance and the inter-group difference are remarkably changed. Therefore, the DLF18 has a wide application prospect in the aspects of agricultural straw utilization and soil remediation.

The invention discloses an intelligent control system and method for wet raking and field returning operation of rice straw based on the Internet of Things, particularly relates to the field of agricultural machinery automation, and is used for solving the problems of tilling depth fluctuation, straw floating and winding and uneven burying thickness caused by muddy water in traditional wet raking operation. The method comprises the following steps: acquiring torque and position information of a rotary blade shaft in real time, establishing a torque sequence and a position index, executing edge detection on the sequence to divide stable sections, generating section labels, matching an action template from a rule base, issuing a tilling depth adjustment and speed correction instruction, and recovering an execution receipt to evaluate torque response. The burying uniformity and the tilling depth stability are calculated and written into a quality account book, and adjacent section optimization strategy switching is retrieved; torque is used as core sensing, sectionalized intelligent regulation and control of the operation process are achieved, continuous and consistent burying and ground surface smoothness are guaranteed, and operation efficiency and quality are improved.

The invention belongs to the technical field of biodegradable high polymer materials, and particularly discloses a PLA / PPC degradable spinning material and a preparation method thereof. The PLA / PPC degradable spinning material is prepared from the following raw materials in parts by weight: 65 to 75 parts of terminated polypropylene carbonate, 15 to 20 parts of polylactic acid, 1 to 2 parts of epoxidized soybean oil, 7 to 10 parts of composite Na-montmorillonite, 3 to 5 parts of light calcium carbonate, 6 to 9 parts of rice straw fiber, 0.6 to 0.8 part of cross-linking agent, 0.2 to 0.5 part of antioxidant, 1 to 2 parts of maleic anhydride grafted PLA compatilizer, 0.07 to 0.01 part of catalyst and 0.3 to 0.5 part of silicone. Various raw materials are mixed, so that the mechanical property of the material is remarkably improved, the material has good strength and toughness, and the comprehensive performance of the material is improved.

The utility model discloses a straw screening device which comprises an installation frame, a feeding port is formed in one side of the installation frame, a feeding roller is installed in the feeding port, a broken yeast separating screen is installed on the portion, on the lower side of the feeding roller, of the installation frame, a conveying channel is installed on the installation frame, and a straw screening mechanism is installed at the input end of the conveying channel. A straw screening roller is installed on the transition section of the conveying channel, a straw conveying roller is installed on the upper side of the conveying channel, an available straw outlet is further formed in the output end of the conveying channel, a waste outlet is formed in the position, at the bottom of the output end of the broken koji separating screen, of the mounting frame, and a power output mechanism is further installed on one side of the bottom of the mounting frame. And the power output mechanism is connected with the feeding roller, the broken yeast separating sieve, the straw screening mechanism, the straw screening roller and the straw conveying roller. According to the utility model, a mixture of broken yeast blocks and straw is mechanically screened, so that the effects of saving labor, improving the recovery rate of the yeast blocks and avoiding waste of raw materials are achieved, and the existing processing requirements are met.

The invention discloses Penicillium chrysogenum DLS189 and application thereof, and relates to the technical field of microorganisms, and the preservation number of the Penicillium chrysogenum DLS189 is CGMCC (China General Microbiological Culture Collection Center) NO.41739. The invention further discloses a preparation method of the Penicillium chrysogenum DLS189. The strain can effectively utilize rice straws and / or bagasse to produce humic acid, and the content of humic acid in each gram of fermentation supernatant after the rice straws are fermented is 16.84%. When the DLS189 fermentation product is applied to crops, the growth condition of the crops can be remarkably improved, and the humus content in soil is increased. Meanwhile, a metagenomics analysis result shows that compared with a control group, after the DLS189 is applied into the soil, the species beta diversity is remarkably changed, and the functional gene abundance and the inter-group difference are remarkably changed. Therefore, the DLS189 has a wide application prospect in the aspects of agricultural straw utilization and soil remediation.

The invention discloses a liquid quantum dot fertilizer and a preparation method and application thereof.The preparation method comprises the steps that treated rice straw is smashed through a smashing machine, the smashed rice straw is placed in a closed container, an ammonia water solution is added, and after even stirring and mixing are conducted, incubation is conducted in the closed container in time under illumination; after incubation is completed, straw residues are twisted and removed, obtained leachate is liquid carbon quantum dot fertilizer, and the straw residues are returned to the field; or the incubated straw residues and the ammonia water solution are subjected to ultrasonic treatment continuously, the straw residues are removed, a liquid carbon-silicon quantum dot fertilizer is generated, and the straw residues are returned to the field. The two liquid quantum dot fertilizers have good compatibility with trace element foliar fertilizers, amino acid-containing foliar fertilizers or pesticides, can improve the crop utilization rate of the trace element foliar fertilizers and the amino acid-containing foliar fertilizers, and can realize simultaneous fertilization and disease control of crops when being mixed with the pesticides. The technology is convenient, economical, practical and efficient.

The invention belongs to the technical field of microbial fermentation and biological agriculture, and discloses a rice straw decomposition agent as well as a preparation method and application thereof. The rice straw decomposition agent is obtained by adopting bacillus megatherium (Bacillus megatherium) Z101 to be subjected to fermentation culture after activation of the bacillus megatherium Z101. The application method comprises the steps that harvested rice straw is flatly laid in a rice field, the water level of the rice field is kept to submerge the rice straw, then the rice straw decomposition agent is diluted with water and then sprayed to the surface of the laid rice straw for decomposition fermentation treatment, and decomposed rice straw is obtained. The rice straw decomposing inoculant is a fermentation culture solution of bacillus megatherium Z101, and compared with a fermentation culture solution obtained by conventional bacillus megatherium in the market, the rice straw decomposing inoculant has higher rice straw decomposing efficiency and speed, in-situ decomposing and field returning of rice straw are facilitated, and a new application way is provided for the bacillus megatherium Z101.

The invention discloses a method for promoting microbial balance and improving the ecological function of soil through straw returning, and relates to the technical field of agricultural soil improvement. In a raw material pretreatment link, microbial agents A and B are added and fixed in a biochar pore structure, and a good foundation is laid for subsequent field returning through operations of pyrolysis carbonization, biological enzyme addition, foliage spraying of a microbial activator and the like. During field returning operation, measures such as specific deep ploughing depth, straw covering thickness and soil improvement agent adding are adopted according to different soil characteristics. In the fertigation process, the relative water content of soil is accurately controlled, fertilization is conducted according to the specific nitrogen-phosphorus-potassium proportion, and drip irrigation and spray irrigation modes are combined. The change of soil microbial communities is monitored by a high-throughput sequencing technology every 15 days, and the soil oxidation-reduction potential is measured by an oxidation-reduction potential instrument and is regulated and controlled in time. The problem of traditional straw returning is effectively solved, and the soil ecological function and the crop yield are remarkably improved.

The invention discloses artificial soil based on manganese slag, red mud and ardealite. The artificial soil is mainly prepared from a manganese slag-red mud-ardealite mixed matrix and a modifier, the weight ratio of the manganese slag to the red mud to the ardealite in the manganese slag-red mud-ardealite mixed matrix is (0.4-1.6): (0.1-0.5): (0.5-0.9); the modifier comprises calcium oxide, and further comprises rice straw, biochar, zeolite or a combination thereof, and the modifier accounts for 1-15% of the weight of the artificial soil. Accordingly, a corresponding preparation method is also established. According to the method, the three solid wastes are mixed according to the characteristics, so that specific pollutants such as ammonia nitrogen, phosphorus, fluorine and Mn < 2 + > can be fixed, the reduction of heavy metals is realized, the nutrients beneficial to plant growth are reserved, the artificial soil with rich nutrients is synchronously reconstructed, the qualitative change from waste residues to resources is realized, the process is simple, and the effect is good. The obtained artificial soil can be used for greening planting, supplementing manganese ore, aluminum ore and phosphorite surrounding soil deficiency areas, and solving the problems of no soil, ploughability and ecological restoration of mining areas.

The invention discloses a cultivation method for fruiting stropharia rugoso-annulata fruiting bodies without covering soil. The cultivation method comprises the following steps: 1) preparing a fruiting culture material; 2) primary composting fermentation; 3) secondary turning fermentation; 4) performing secondary fermentation in a greenhouse; (5) spreading materials; (6) sowing; 7) spawn running; 8) bud pressing; 9) cultivating mushrooms; and 10) harvesting. And 11) tide turning management. According to the method, the cotton residues, the sawdust, the rice chaff, the corncob, the rice straw, the wheat bran and the lime are adopted to form the fruiting culture material, and a cultivation method of fruiting without earthing is combined, so that the working procedures of excavating, disinfecting, covering and the like of an earthing material are reduced, meanwhile, the quality of sporocarp is improved, the high-quality mushroom rate is improved to 72.2% from 35.3% of field cultivation, the cleanliness of the sporocarp is improved to 92.5% from 20.3%, and the yield of the sporocarp is improved. Meanwhile, cotton residues and rice straw are effectively utilized, economic and ecological benefits are remarkable, after the first flush of mushrooms is harvested, holes are punched in the bed surface, water is sprayed on the bed surface, the humidity of compost is effectively supplemented, and high-quality sporocarps can be produced all the year round.

The invention discloses an adsorbent for trapping industrial waste gas carbon dioxide as well as a preparation method and application thereof, and relates to the technical field of carbon dioxide trapping. According to the technical scheme, the preparation method comprises the following steps: S1, activating rice straws or wood chips with KOH to prepare porous biochar; s2, performing in-situ growth of a Cu-BTC MOF layer on the surface of the biochar through a hydrothermal method; s3, grafting a polyethyleneimine-polyethylene glycol copolymer on the surface of the charcoal modified by the Cu-BTC MOF layer; and S4, mixing the material obtained in the step S3 with the nano ZnO / carbon quantum dot compound to obtain the adsorbent for capturing industrial waste gas carbon dioxide. According to the prepared adsorbent, the CO2 adsorption capacity is larger than 1.8 mmol / g in the high-humidity (85% RH) environment, and compared with a traditional amino adsorbent, the CO2 adsorption capacity is greatly improved; after 1500 times of circulation, the CO2 adsorption capacity retention rate is greater than 90%, and the high-efficiency and low-consumption carbon capture adsorbent is constructed.

The invention relates to the technical field of agricultural planting, in particular to a biochar fertilizer for sugarcane as well as a preparation method and application of the biochar fertilizer. According to the technical scheme of the invention, a substrate material of sugarcane biochar is a mixture of sugarcane straw biochar and sugarcane leaf biochar; in the process of preparing the sugarcane straw biochar, the purpose of increasing the pores of the sugarcane straw biochar is achieved by adopting freezing and rapid sublimation modes; the water retention capacity of the sugarcane straw biochar is improved, a fresh leaf rapid carbonization method is adopted during preparation of the sugarcane leaf biochar, the content of organic matter in sugarcane leaves is guaranteed to the maximum extent, a sugaring stack retting mode is adopted during processing, and the diversity of microbial communities in the biochar is improved; in addition, corn straw biochar and rice straw biochar are added, the carbon-nitrogen ratio of the biochar is effectively improved, the biochar is more suitable for growth of ratoon sugarcanes, and the biochar prepared through the method has good water retention capacity and soil improvement capacity and can effectively prolong the growth period of the ratoon sugarcanes.

The invention discloses a step-by-step preparation method and application of multi-metal modified biochar. According to the method, through an innovative four-stage step-by-step loading process, four metal salt solutions of FeCl3, MnCl2, CaCl2 and MgCl2 are sequentially used for carrying out modification treatment on the biochar, and the Fe-Mn-Ca-Mg quaternary composite modified biochar is successfully prepared. The method is mainly technically characterized by comprising the following steps: (1) pretreating rice straws by adopting a three-stage countercurrent cleaning and gradient drying process; (2) performing programmed temperature control pyrolysis under the protection of nitrogen to prepare basic biochar; and (3) the sequential loading of the four metal ions is realized by accurately controlling reaction conditions. Experimental results show that the adsorption capacity of the prepared quaternary composite modified biochar on As in a water body is increased by 2 times compared with that of original biochar, the removal rates of Cd, Cu and Pb in the water body all exceed 90%, and the removal rates of Ni and Hg in the water body are increased by 10-15%. The material shows excellent synergistic adsorption performance in a multi-metal coexistence system, and an efficient solution is provided for complex heavy metal pollution abatement.

The invention belongs to the technical field of microbial fermentation and biological agriculture, and discloses a soil remediation fungicide as well as a preparation method and application thereof. The preparation method comprises the following steps: activating bacillus megatherium Z101, inoculating the activated bacillus megatherium Z101 into fermentation liquor containing rice straw powder, carrying out fermentation culture, and carrying out vacuum spray drying on fermentation mixed liquor after fermentation is completed, so as to obtain soil remediation bacterium powder; or further mixing the soil remediation bacterium powder with auxiliary materials and water, and granulating to obtain the soil remediation bacterium granules. The application method comprises the following steps: in a rice planting stage, applying the soil remediation fungicide and an inorganic fertilizer together to remedy rice field soil and promote rice growth. The soil remediation fungicide prepared by fermentation culture of the bacillus megatherium Z101 has remarkable advantages in the aspects of rice yield increase, soil pH value increase and physicochemical property improvement, and a new application way is provided for the bacillus megatherium Z101.

The straw collecting and granulating device comprises a harvester body, a header assembly and a driving assembly, the driving assembly comprises an engine, a transmission assembly, a feeding assembly and a granulating assembly are arranged on the harvester body, the feeding assembly is connected with the right end of the header assembly, and the granulating assembly is connected with the right end of the header assembly. The feeding assembly comprises a feeding frame and a conveying mechanism, a first feeding port is formed in the left end of the feeding frame and connected with the header assembly, the granulation assembly is arranged below the feeding frame, one end of the transmission assembly is connected with the engine, and the other end of the transmission assembly is connected with the first driving shaft. According to the straw collecting and granulating device changed from the small-sized harvester, the small-sized crawler-type harvester is used as a main body for improvement, additional power is not needed, function conversion from threshing operation to straw collecting and granulating operation is achieved, and the straw collecting and granulating device is suitable for operation of small-area field parcels in the south, and flat-die granulating and field in-situ discharging of pure rice straw are completed.

The invention relates to the field of fertilizer making equipment, in particular to a rice straw recycling, composting and fermenting device which comprises a rack and a fermenting barrel mounted on the rack, and a material opening is formed in one end of the fermenting barrel; a material opening is formed in the machine frame, a blocking door used for controlling opening and closing of the material opening is arranged in the material opening, the fermentation barrel is horizontally arranged and rotationally connected to the machine frame, and a stirring assembly is arranged in the fermentation barrel and comprises a plurality of fixing plates arranged at intervals in the direction of a spiral line coaxial with the fermentation barrel. The movable plate is arranged corresponding to a gap between two adjacent fixed plates, the movable plate and the fixed plates form a spiral plate-shaped structure, the movable plate is rotationally connected to the fermentation barrel, and the rotating axis of the movable plate is perpendicular to the rotating axis of the fermentation barrel. The fertilizer turning device has the effect of improving the fertilizer turning efficiency.

The invention belongs to the field of soil environment pollution simulation and prediction, and provides a prediction method based on a two-point chemical unbalanced model, which is used for quantitatively evaluating the effect of regulating and controlling the migration behavior of p-nitrophenol in acid red soil by straw stalk biochar. According to the method, a biochar-red soil composite medium system is constructed, a soil column leaching experiment is carried out to obtain penetration curve data, a two-point chemical unbalance model in CXTFIT software is utilized to carry out parameter inversion, and key parameters such as a retardation factor, a two-region distribution coefficient, a mass transfer coefficient and a liquid phase degradation coefficient are accurately identified. Model verification shows that the goodness of fit is high, and a parameter change rule reveals the inherent mechanism of enhancing the pollutant retention capacity, changing the proportion of fast and slow adsorption sites and influencing mass transfer kinetics by the biochar. Based on the verified model, the long-term migration behavior and pollution risk of p-nitrophenol under different environmental conditions can be simulated, and a scientific basis is provided for groundwater pollution control and remediation strategy optimization.

The invention discloses a straw pre-wetting time judgment method and system, particularly relates to the technical field of agricultural waste treatment intelligent control, and is used for solving the problem of multi-target conflict between existing pre-wetting process parameters and tunnel fermentation energy consumption. The method comprises the following steps: acquiring initial moisture content and bulk density distribution data of straw in real time, identifying spatial distribution of a high-density blocking region and a low-density permeation channel in a stacking layer, and generating an effective length reflecting a moisture permeation path; generating a pre-wetting time reference value based on dynamic weight fusion of the current batch and historical pre-wetting data, and performing collaborative correction in combination with a coupling relationship between equipment idling time and ventilation energy consumption; the pre-wetting time threshold value is dynamically adjusted through a cooperative feedback mechanism of the main fiber direction of the straw stalks and the acoustic impedance characteristics of the stacking layers; finally, a termination instruction is triggered according to the continuous stable state of the surface layer moisture content and the fiber orientation, and precise balance between energy consumption and process efficiency is achieved while the pre-wetting uniformity is improved.

The invention discloses a nano-material-based nitrogen-phosphorus-potassium compound fertilizer as well as a preparation method and application thereof, and belongs to the field of plant nutrition and soil science research. According to the invention, the nano biochar prepared through nano grinding after pyrolysis of the rice straw is directly mixed with three chemical components, namely the urea, the ammonium dihydrogen phosphate and the potassium chloride, and the sodium bentonite, and the key points of the effects are triple effects of promoting early growth and rapid ripening, enhancing tillering and advancing heading. After the nano biochar is matched with balanced NPK nutrition (such as NPK-II), the activity level of soil key enzymes, including catalase (CAT), alkaline phosphatase (AKP), urease (UE), sucrase (SC) and the like, is remarkably improved. Besides, the composite particles are constructed through the cooperation of the nano-charcoal and the bentonite, and a low-temperature drying process is adopted, so that moisture absorption and caking can be inhibited, and the storage stability and field application performance of the fertilizer are remarkably improved.

The invention provides a fertilizing method for increasing the rice yield based on straw mixed fertilizer, and belongs to the technical field of fertilizer. The fertilizing method comprises the following steps: applying a rice straw mixed fertilizer as a base fertilizer once, wherein 170-250 kg of the rice straw mixed fertilizer is applied per mu; applying tillering fertilizer once after the rice turns green, and applying ear fertilizer once from the end of tillering to the early stage of jointing and booting; the rice straw mixed fertilizer comprises the following components in parts by weight: 80-90 parts of straw, 1-3 parts of monoammonium phosphate, 5-10 parts of urea and 2-4 parts of potassium chloride. The fertilizing method can effectively improve the soil fertility, increase the rice yield, increase the fertilizer utilization rate and effectively reduce the application amount of the chemical fertilizer, so that the fertilizing method has better chemical fertilizer reduction and synergism effects and is worthy of production, popularization and application. According to the fertilizing method, through a one-base two-topdressing mode, on the basis of reducing chemical fertilizer application, the rice yield is remarkably increased, the number of times of panicle fertilizer application is reduced by 1-2 times compared with that of a conventional fertilizing mode, and the fertilizing method has more advantages compared with a traditional fertilizer applying method.

The invention relates to the technical field of soil carbon improvement, and discloses a composite biological stimulant for tropical rainforest soil carbon improvement and a preparation method and application thereof, the composite biological stimulant is obtained by mixing a microbial preparation, an immobilized carrier, porous biochar, an inorganic mineral compound, a slow release fertilizer, a soil conditioner and a plant symbiotic inoculant; the microbial preparation comprises one or more of lactic acid bacteria, nitrifying bacteria, phosphate solubilizing bacteria, nitrogen-fixing bacteria and arbuscular mycorrhizal fungi; the inorganic mineral compound comprises feldspar, apatite and montmorillonite; the slow-release fertilizer comprises biochar, humic acid and phosphate; the soil conditioner comprises biological colloid prepared from seaweed extract and natural plant fiber prepared from straw and palm fiber; the plant symbiotic inoculant comprises rhizobium and / or endophyte. According to the composite biological stimulant, the soil carbon fixing capacity of the tropical rainforest is remarkably improved, the soil void structure is improved, and the plant growth capacity is enhanced.