133 results about "Low nitrogen" patented technology

The utility model discloses a hydrogen ammonia coupling low nitrogen burner relates to burner technical field, including first tank and second tank, be equipped with connecting subassembly between the first tank and the second tank, first tank far away from the one end of second tank is fixedly connected with the gas outlet pipe, the gas outlet pipe is communicated with first tank, and the gas outlet pipe is connected with the gas outlet pipe. A combustion assembly is arranged at one end of the gas outlet pipe away from the first tank; through the arrangement of the ammonia gas inlet pipe and the pipe connector, hydrogen and ammonia gas in a specific proportion can be injected into the cavity formed by the first tank body and the second tank body during working, the hydrogen and the ammonia gas are mixed through the premixing assembly and then sprayed out of the nozzle, the combustion temperature can be effectively reduced through the addition of the ammonia gas, NOx generation is reduced, meanwhile, the combustion speed of the ammonia gas is low, and the combustion efficiency is improved. And after the ammonia gas is mixed, the overall combustion speed can be reduced, the combustion stability is improved, so that the combustor has good combustion stability, and meanwhile, the emission of NOx is greatly reduced.

This invention relates to the field of thermal power generating unit operation control, and discloses a method for coordinated control of coal consumption and low-NOx emissions in supercritical units. The method includes: collecting operating data such as unit load, coal feed rate, air volume, furnace outlet oxygen content, CO concentration, SCR inlet NOx concentration, SCR outlet NOx concentration, ammonia injection rate, and main steam pressure; dividing the control cycle according to the load change rate and the lag state of heat release into the furnace; generating candidate coal consumption optimization actions within the steady-state control cycle, and performing low-NOx margin verification and burnout constraint verification; when the verification fails, it is determined to be a low-NOx coal consumption conflict state, restricting the reduction of oxygen content and total air volume, and sequentially performing secondary air layer distribution correction, burnout air opening correction, main steam pressure setting compensation, and ammonia injection feedforward correction; after the control action is executed, the corresponding action is maintained, rolled back, or frozen based on the retest results. This invention can improve the synergy between coal consumption control and low-NOx emission control.

The invention belongs to the technical field of microalgae biological culture, discloses a method for promoting growth of nostoc by efficiently utilizing a nitrogen source through solid-liquid culture, and aims to solve the problems of low nitrogen source utilization rate and slow biomass accumulation in the conventional culture technology. The method is based on a closed photobioreactor with gas-liquid circulation, and comprises the following steps: preparing a nitrogen-free BG11 culture medium; coating nostoc on the surface of the sterilized porous hydrophilic sponge; placing the sponge in a reactor, and adding the culture medium until no accumulated water is infiltrated; after closing the reactor, controlling the temperature, lighting and other conditions, continuously / intermittently supplementing nitrogen and maintaining certain positive pressure, and circulating the culture medium to supplement nutrition; and taking the sponge after the culture is finished. The utilization rate of a nitrogen source is remarkably increased, the biomass obtained through culture is remarkably increased, culture conditions are stable, and the method is suitable for large-scale development of nostoc and development of high-added-value products.

The invention relates to a coal power plant flue gas denitration ammonia supply intelligent control method which comprises the following steps: acquiring historical data of coal power plant flue gas denitration and real-time detection data of a plurality of point locations on denitration inlet and outlet flue gas cross sections, and recording adjustment data of ammonia spraying branch pipe valves corresponding to ammonia spraying leveling of each point location, the historical data and the adjustment data are input into the LSTM neural network model to obtain nitrogen oxide prediction data at the next moment, the nitrogen oxide prediction data, the real-time detection data and the adjustment data are input into the random forest model to obtain a prediction value of the nitrogen oxide concentration of each point location, and the opening degree of an ammonia supply main adjustment valve is adjusted according to the average nitrogen oxide concentration to obtain the nitrogen oxide concentration of each point location. And adjusting the valve opening of each ammonia spraying branch pipe based on the predicted value of the nitrogen oxide concentration of each point location. Through the method and the device, the problem of low nitrogen supply amount control accuracy is solved, historical monitoring data and real-time detected multi-point detection data are integrated, and the accuracy of a prediction result is improved; leveling data are optimized through ammonia spraying, and a branch pipe control valve opening degree control strategy is provided.

The invention discloses a gene for promoting low-nitrogen efficient utilization of rice and enlarging grains and application of the gene. The gene is derived from rice and is named as OsUGT, and the nucleotide sequence of the gene is shown as SEQ ID NO.1; the amino acid sequence of the protein coded by the gene is as shown in SEQ ID NO. 2. The invention provides a construction method of an OsUGT gene overexpressed transgenic rice strain, which comprises the following steps: constructing pRHVc-OsUGT recombinant plasmids, transforming the pRHVc-OsUGT recombinant plasmids into calluses through an agrobacterium tumefaciens-mediated method, and screening resistant calluses and regenerating plants to obtain the OsUGT gene overexpressed rice. The OsUGT gene is overexpressed in a rice plant by adopting a pRHVc vector through a transgenic technology, so that the nitrogen utilization efficiency of the plant in a medium-low nitrogen stress environment can be remarkably improved, grain enlargement and grain weight increase can be effectively promoted, stable improvement of the crop yield under a low-nitrogen condition is realized, and the technical effect is clear and efficient.

The utility model relates to the technical field of low-nitrogen combustors, and provides a low-nitrogen combustor internal pressure detection device which comprises a multilateral lantern ring assembly, a plurality of triangular turning plates and a force detection mechanism, the multilateral lantern ring assembly is fixedly arranged on one side, close to a ventilation pipeline, of a primary air pipe and a secondary air pipe, and the triangular turning plates are arranged on the multilateral lantern ring assembly. The multiple triangular turning plates are rotationally connected to the multilateral lantern ring assembly, the multiple triangular turning plates are arranged in the primary air pipe and surround the primary air pipe in a circumferential mode, the multiple side edge contact strength detection mechanisms of the adjacent triangular turning plates are arranged, and the multiple strength detection mechanisms are fixedly connected to the multilateral lantern ring assembly. By means of the technical scheme, the problem that in the prior art, when airflow flows unstably, the real gas pressure is difficult to measure is solved.

The invention discloses an application of a TaERF9 gene in cooperation with histone modification to participate in nitrogen-mediated root development. The homologous genes of three subgenomes of the TaERF9 gene respectively correspond to the GenBank numbers of CM022223.1, CM022224.1 and CM022225.1 in NCBI (National Center of Biotechnology Information). According to the invention, wheat KN199 is directionally edited by using a CRISPR-Cas9 (clustered regularly interspaced short palindromic repeats-associated protein 9) technology, so that a mutant plant with TaERF9 function deletion is obtained. Protein interaction experiments prove that the TaERF9 can interact with the subunit SWN of the PRC2. The results of high-nitrogen and low-nitrogen water culture experiments show that TaERF9 gene mutation significantly promotes root development under a high-nitrogen condition; under the low-nitrogen condition, the root development of the mutant is kept similar to that of a wild type, the ability of balancing the root development under different nitrogen supply conditions is shown, and the effect of the TaERF9 gene in nitrogen response mediated root development regulation is revealed. That is to say, the TaERF9 gene can promote root development after mutation, so that a gene resource is provided for nitrogen-efficient breeding of crops.

The utility model discloses a split type low-nitrogen combustor of a boiler, and relates to the technical field of boiler combustion equipment. Comprising a supporting seat, a circle of guiding outer wall is fixedly connected to the top side of the supporting seat, a circle of circulating barrel is fixedly connected to one side of the guiding outer wall, a circle of collecting ring wall is fixedly connected between the inner walls of the ends, opposite to the supporting seat, of the circulating barrel, and a plurality of evenly-distributed recycling holes are formed in the surface of the collecting ring wall. And a circle of mixing pipe is fixedly connected between the inner walls of the recovery holes. According to the utility model, the overflowed flue gas which is not fully combusted is guided into the space between the circulating barrel and the mixing pipe through the arrangement of the outwards extending collecting ring wall and the recycling hole, and the flue gas which is not fully combusted is guided into the mixing pipe through the arrangement of the recycling outer wall and the guiding inner ring and is fully mixed with air for combustion; therefore, the nitrogen-containing gas is fully combusted, the content of nitrogen-containing compounds in the waste gas is reduced, and the pollution of the waste gas to the environment is reduced.

A dual-premixed ammonia burner relates to the field of ammonia combustion equipment. Addressing the problems of high ignition energy, slow combustion speed, poor flame stability, and difficulty in achieving stable combustion in large proportions with ammonia, this invention employs a dual premixing structure of auxiliary fuel gas premixed with ammonia and air premixed with ammonia, combined with a three-stage coaxial air duct and a regenerative pre-combustion chamber to achieve stable combustion. The burner includes an ignition gun, a primary air regulating damper, a secondary air regulating damper, a volute-shaped air casing, a primary air annular duct, swirl vanes, an annular ammonia multi-nozzle header, a pre-combustion chamber, a tertiary air multi-nozzle annular pipe, a flame monitor, and dual ammonia and auxiliary fuel inlets. This invention allows for wide load adjustment from 30% to 100%, no flameout at low loads, high burnout rate, and low nitrogen oxide emissions. It can operate with a large proportion of ammonia or pure gas, features a reasonable structure, reliable ignition, and stable safety, and is suitable for zero-carbon retrofitting and efficient utilization of green ammonia in industrial boilers, kilns, and other thermal equipment.

The invention discloses a water pipe type two-return-stroke energy-saving and emission-reducing superheater assembly of a traditional boiler, and relates to the superheater assembly researched and developed according to the wide-capacity radiation heat exchange concept of a boiler hearth and the physical phenomenon outside the field (see the specification in details) capable of generating extremely few nitrogen oxides, and a traditional boiler body with the modified hearth. After the flange pipelines are connected and combined, the technical advantages brought by obvious technical characteristics are derived: the heat efficiency is improved by about 6-8%, the steel consumption is reduced by about 20%, and the cost is reduced by 30% due to the application of the boiler hearth tolerance radiation heat exchange concept; forced circulation medium water is in a water pipe of the two-return-stroke energy-saving emission-reducing superheater assembly, the heat exchange second flow speed is increased to about 1.5 m, the technical characteristic completely meets the requirement of physical phenomena outside the field capable of generating extremely few nitric oxides, and the purpose of ultralow nitrogen emission of the nitric oxides smaller than or equal to 15 / 25 milligrams is achieved; meanwhile, other technical problems of the product in the background technology are solved.

The application provides a livestock and poultry manure black film fermentation resourceization method and system based on composite microbial flora immobilization and micro-oxygen control, and belongs to the technical field of livestock and poultry manure resourceization utilization and environmental engineering. The system comprises a fermentation tank, a fermentation liquid discharge pipe, a sewage pipe and an oxygen increasing assembly connected to the fermentation tank, a black film installed on the inner wall of the fermentation tank, a suspension assembly installed on the top of the fermentation tank, and a plurality of bag bodies suspended on the suspension assembly, wherein the bag bodies are filled with a mixture of composite immobilized microbial inoculum and soil, h2 / h1=0.3-0.75 is satisfied between the bag body and the fermentation tank, and the bag body is located below the livestock and poultry manure liquid level in the fermentation tank. The system has the advantages of short fermentation period, high harmless degree of fermentation liquid, low nitrogen loss rate and no obvious odor.

The application provides a kind of pyrolysis furnace low nitrogen combustion multi-objective optimization method, optimization system and storage medium.The multi-objective optimization method includes the following steps: establishing the turbulent combustion coupling model describing the flow and fuel combustion condition of the target pyrolysis furnace flue gas;Simplify the methane combustion mechanism of the turbulent combustion coupling model to obtain a simplified model describing the simplified mechanism of combustion reaction kinetics;Determine the input variables and output variables of the proxy model for predicting NOx emissions and flue heat efficiency;Obtain experimental sample points about the input variables and the output variables, and obtain the corresponding simulation results;Based on the experimental sample points and the simulation results, the proxy model is established via radial basis neural network;And the NSGA-II algorithm is used for multi-objective optimization of pyrolysis furnace low nitrogen combustion to determine the optimized input variable parameters balancing nitrogen emissions and thermal efficiency.

The utility model discloses a combustor low-nitrogen center gun and a low-nitrogen combustor, and relates to the field of fuel gas grading low-nitrogen combustors, the low-nitrogen combustor is suitable for fuel gas grading, the low-nitrogen center gun comprises a fuel gas vertical pipe, a fuel gas transverse pipe, a plurality of fuel gas dispersing nozzles and a fuel gas fire stabilizing sheet, and the fuel gas transverse pipe is provided with a plurality of fuel gas dispersing nozzles; each fuel gas dispersing nozzle is provided with a plurality of small-angle spraying holes; the fuel gas fire stabilizing sheet is positioned at the downstream of the fuel gas spraying direction of the fuel gas dispersing nozzle; the fuel gas vertical pipe is communicated with the fuel gas transverse pipe and used for inputting fuel gas. A low-nitrogen center gun is designed in a combustion-supporting air channel of a burner block, gas of the center gun is rapidly and evenly distributed in combustion-supporting air, and a fire stabilizing sheet is designed and arranged in the combustion-supporting air channel of the burner block at the position, corresponding to the gas concentration range, of which the gas concentration is within the gas concentration range of 80%-150% of the air excess coefficient after the gas and the air are mixed. A low-speed area and a backflow area in which fuel gas and air mixed gas flow are formed, the fuel gas of the center gun is ignited and ignited at the downstream of the fire stabilizing piece, the amount of nitrogen oxide generated by the center gun of the fuel gas grading low-nitrogen burner can be reduced, and the burner can obtain lower nitrogen oxide emission.

The utility model relates to the technical field of low-nitrogen combustors, in particular to an adjusting mechanism for a low-nitrogen combustor, which comprises a bottom plate, a low-nitrogen combustor body and a horizontal adjusting mechanism, the horizontal adjusting mechanism comprises a vertical plate fixedly connected to the upper end face of the bottom plate, and a sliding rod is slidably connected to the outer wall of the vertical plate in a penetrating manner; the vertical adjusting mechanism comprises a mounting plate located over the sliding rod, the low-nitrogen burner body is mounted on the upper end face of the mounting plate, and a jack is mounted between the mounting plate and the sliding rod. The low-nitrogen burner is simple to operate and convenient to use, the mounting plate can be driven to move up and down through the jack, so that the height of the low-nitrogen burner body is adjusted, the axis of the low-nitrogen burner body can be quickly aligned with the heating surface of a boiler for different boilers, adjustment is convenient, and time and labor are saved.

The invention relates to the technical field of fruit and vegetable cultivation, and provides a water chestnut fertilization influence analysis method based on principal component analysis, which comprises the following steps: setting a plurality of field trials for different nitrogen, phosphorus and potassium fertilization level treatment; measuring plant growth indexes, yield indexes, corm quality indexes and soil physicochemical property indexes of the treated water chestnuts; performing principal component analysis on the measured multiple indexes, and extracting principal components of which the characteristic values are greater than 1; calculating comprehensive scores of the processing according to the scores of the principal components and sorting the comprehensive scores; according to the comprehensive score, evaluating the comprehensive influence of different fertilization treatments on the growth, yield, quality and soil properties of the water chestnuts, and screening out an optimal fertilization combination. According to the method, the matching of medium-low nitrogen and phosphorus and medium-high potassium is clear, so that high yield and high quality are guaranteed, soil acidification can be effectively relieved, excessive consumption of nutrients is avoided, synergism of fertilizer saving, efficiency improvement, soil health and quality improvement is realized, and data support and quantitative decision basis are provided for scientific fertilization of the water chestnuts.

The low-nitrogen combustor comprises a fixed shell, a gas pipeline, an air inlet, a flow dividing pipe and a flow dividing head, the gas pipeline is arranged in the fixed shell, a first spraying hole and a second spraying hole are formed in one end of the gas pipeline, and the flow dividing pipe is arranged in the fixed shell so that combustion-supporting air can be divided, and the mixing efficiency of the combustion-supporting air can be improved; a shunting head is arranged at one end of the shunting pipe; combustion-supporting air can be effectively distributed, then the mixing efficiency of fuel gas and the combustion-supporting air is improved, the input amount of the combustion-supporting air can be effectively reduced, the combustion efficiency can be improved through premixing of the fuel gas and the combustion-supporting air, and meanwhile, the temperature of a combustion chamber can be reduced through part of divided combustion-supporting air; on the other hand, smoke which is not fully combusted can be used for supporting combustion again, and the purposes of fully combusting and reducing the content of rapid and thermal nitrogen oxides are achieved.

This invention discloses the application of the BS1 protein in regulating plant vessel and pit structure and transport capacity. BS1 mediates acetylation modification of xylan at the pit edge, affecting the arrangement of nanofibers at the pit edge and the formation of pit structure, thereby influencing plant transport capacity. This invention is the first to discover that BS1-mediated acetylation modification at the pit edge plays an important role in pit nanostructure and morphology, as well as vessel transport capacity. Furthermore, BS1 It also mediates changes in pit structure under low-nitrogen treatment. Therefore, it can be controlled by regulating... BS1 The expression level or activity of rice under low nitrogen conditions, and the cultivation of rice with high transport capacity under low nitrogen conditions, have broad application prospects.

The utility model relates to a novel flame stabilizing disc of a low-nitrogen combustor, and belongs to the technical field of combustors. The air flow stabilizing device comprises an air conveying spray pipe, a fixing ring, an air flow stabilizing ring and a plurality of air flow deflectors, the air flow deflectors are arranged on the outer wall of the air conveying spray pipe, the air flow deflectors are sleeved with the fixing ring, and the air flow stabilizing ring is installed outside the fixing ring. The device is reasonable in structural design, safe, reliable and environment-friendly, NOx emission can be effectively reduced, and the use requirement is met.

The utility model relates to the technical field of combustors, in particular to a biomass hydrogen low-nitrogen combustor which can adjust the concentration of hydrogen, avoids explosion caused by overhigh hydrogen concentration, and is convenient to use and high in reliability and safety. Comprising a bottom plate and a low-nitrogen burner, the low-nitrogen burner is installed on the bottom plate, and an air inlet pipe is arranged on the low-nitrogen burner; the device further comprises a purification mechanism, a conveying mechanism and a gas concentration adjusting mechanism, the input end and the output end of the conveying mechanism are connected with the purification mechanism and the gas concentration adjusting mechanism respectively, the purification mechanism is used for purifying impurities in gas, the gas concentration adjusting mechanism is used for adjusting the concentration of hydrogen, and the output end of the gas concentration adjusting mechanism communicates with the gas inlet pipe.

The invention discloses an application of a rice OsRNU9 gene. The registration number of the nucleotide sequence of the OsRNU9 gene in Genbank is LOC4325001, and the registration number of the nucleotide sequence of the OsRNU9 gene in Genbank is LOC4325001. RNA-seq is utilized to discover that the OsRNU9 shows response to the external nitrogen supply level, and fluorescent quantitative PCR (Polymerase Chain Reaction) proves that the OsRNU9 is induced by low nitrogen. Knockout of the OsRNU9 can cause reduction of the nitrogen absorption rate, tillering, plant height and yield of the rice, and the comprehensive performance is that the utilization efficiency of the nitrogen fertilizer is reduced. The function of the OsRNU9 gene for positively regulating the utilization efficiency of the rice nitrogen fertilizer is defined, and a technical route for improving the utilization efficiency of the rice nitrogen fertilizer by increasing expression of OsRNU9 in rice is provided.

The utility model provides an alkali spraying device for an ultra-low nitrogen burner and the ultra-low nitrogen burner, and belongs to the technical field of waste gas spraying treatment, the alkali spraying device comprises a tower body, a circulating water tank, a gas chamber, a packing layer, a spraying layer and a demisting layer are sequentially arranged in the tower body from bottom to top, and a gas inlet is formed in the side wall of the tower body corresponding to the gas chamber; the gas inlet is connected with a waste gas flue of the ultra-low nitrogen combustor through a gas inlet pipe; the nozzle assembly is arranged in the spraying layer, the nozzle assembly is connected with the circulating water tank through a spraying pipe, and a circulating water pump is arranged on the spraying pipe; the dosing tank is connected to the spraying pipe through an electromagnetic control valve; and the pH value control assembly is electrically connected with a pH sensor and an electromagnetic control valve which are arranged in the air chamber. The ultra-low-nitrogen burner has the beneficial effects that the alkali spraying device is arranged on the ultra-low-nitrogen burner, so that the ultra-low-nitrogen burner can further remove other acid pollutants in waste gas while reducing NOx emission, the waste gas treatment effect and efficiency are improved, and the environment-friendly requirement is met.

This invention relates to the application of a nitrogen-efficient gene in maize, ZmLTPg14-NPF5.14. The nitrogen-efficient gene ZmNPF5.14 described in this invention promotes maize resistance to low nitrogen stress. Knocking out this gene reduces maize's resistance to low nitrogen stress. Mutant maize plants with this gene knockout exhibit more yellowing leaves under low nitrogen conditions compared to control plants, showing a more sensitive phenotype. ZmLTPg14 reduces maize's resistance to low nitrogen stress; mutant maize plants with this gene knockout are less sensitive to low nitrogen than control plants. Correspondingly, plants overexpressing ZmLTPg14 are more sensitive to low nitrogen. Furthermore, double mutants with both ZmLTPg14 and ZmNPF5.14 knockouts exhibit the same phenotype under low nitrogen conditions as those with ZmNPF5.14. The mutant of ZmLTPg14 can be used to cultivate maize varieties that are not sensitive to low nitrogen. The mutant plants of ZmNPF5.14, the overexpression plants of ZmLTPg14, and the double mutants of the two genes ZmLTPg14 and ZmNPF5.14 can be used to cultivate maize varieties that are sensitive to low nitrogen.

The present application relates to burner waste heat utilization technical field, particularly relates to a kind of low nitrogen alcohol burner waste heat heat exchange equipment and working method thereof. Including outer tube, first heat exchange unit and second heat exchange unit are equipped in the outer tube, second water storage tank is communicated on the output end of the outer tube;The second water storage tank includes outer box, first heating cavity is equipped in the outer box.The present application utilizes back wave board fan annular structure to make water flow tumbling, so that water flow position at center and edge is exchanged.Upgrade secondary heating uniformity.After first heating mechanism is heated, water flow is shunted again, a part enters first water cavity, and the rest enters second heating cavity and is further heat exchanged using second medium tube quantity more second heating mechanism. So that cold water can be shunted and heat exchanged at different temperatures without artificial transportation, so as to enrich the functionality of the device.

The application discloses a sugarcane cultivation method for controlling sugarcane acidification, relates to the technical field of sugarcane cultivation, and solves the problems of unstable nitrogen fixation effect and low nitrogen fixation efficiency of sugarcane. The sugarcane cultivation method comprises land preparation, ditch planting, fertilization, intertillage, soil cultivation and disease and pest management, further comprises seed dressing treatment by using a nitrogen fixation promoter during sugarcane planting, the nitrogen fixation promoter is mainly formed by mixing of symbiotic nitrogen fixation bacteria and peanut root extract; and only the base fertilizer contains nitrogen fertilizer during the whole growth cycle of the sugarcane, and the fertilizers applied in other periods do not contain nitrogen fertilizer. The application improves the infection of the symbiotic nitrogen fixation bacteria, promotes the symbiotic effectiveness of the symbiotic nitrogen fixation bacteria and the sugarcane, solves the problem of unstable nitrogen fixation effect of the symbiotic nitrogen fixation bacteria of the sugarcane, achieves efficient nitrogen fixation, less nitrogen fertilizer application and the purpose of reducing soil acidification.

This invention belongs to the field of crop breeding, specifically relating to an NtLHT1 gene and its application in tobacco's resistance to low nitrogen stress. It involves artificially intervening in the mutation of specific nucleotide sequence fragments in the NtLHT1 gene to obtain two mutated nucleotide sequence fragments, resulting in a mutant NtLHT1 gene, and the application of the mutant NtLHT1 gene in improving tobacco's resistance to low nitrogen stress. The NtLHT1-edited tobacco plants of this invention exhibit enhanced absorption of nitrate and ammonium nitrogen during their vigorous growth period, increased activity of nitrate reductase and glutamine synthase, increased expression of nitrogen transporter genes, and improved nitrogen utilization efficiency. This invention increases the activity of nitrate reductase and glutamine synthase, thereby improving tobacco's resistance to low nitrogen stress and providing a genetic resource and material basis for the development of nitrogen utilization-related genes and strains in tobacco.

The invention provides application of an OsPLN1 gene in regulation and control of nitrogen utilization efficiency and yield of rice, a nucleotide sequence of the OsPLN1 gene is shown as SEQ ID NO.1, and the OsPLN1 gene can negatively regulate and control nitrogen absorption capacity of the rice under a low-nitrogen culture condition. The amino acid sequence of the protein coded by the OsPLN1 gene is as shown in SEQ ID NO. 2. A target spot of the OsPLN1 gene is knocked out, and an Ospln1 mutant plant is obtained. Experiments show that under a low-nitrogen culture condition, compared with a wild plant, the overground part height and biomass of the Ospln1 mutant plant are remarkably increased, and the inhibition of low-nitrogen stress on plant growth is effectively overcome. Under a low-nitrogen culture condition, the total nitrogen content of an Ospln1 mutant plant is obviously higher than that of a wild type plant, so that the nitrogen absorption capacity of the plant under the low-nitrogen culture condition is enhanced, and the inhibition effect of low-nitrogen stress on plant growth is relieved to a certain extent. The cooperative regulation capability of the OsPLN1 gene provides a core gene resource for cultivating a new variety of'fertilizer-saving and high-yield 'rice, and has great significance for agricultural sustainable development.

The invention discloses a bacterial strain with high nitrite tolerance and an ammonium production function, a microbial agent and a preparation method and application of the microbial agent, and relates to a bacterial strain, a microbial agent and a preparation method and application of the microbial agent. The invention aims to solve the problems of low nitrogen effectiveness, excessive use of chemical nitrogen fertilizer, soil ecological degradation and poor tolerance of the traditional denitrification process. The strain is named as Streptomyces anulatus 255, and is preserved in the China Center for Type Culture Collection, the address is Wuhan University, Wuhan, China, the preservation date is May 12, 2025, and the preservation number is CCTCC NO: M 20251026. The invention belongs to the technical field of microorganisms.

The utility model discloses an ultra-low nitrogen burner which comprises a bottom plate, the bottom face of the bottom plate is fixedly connected with a set of supporting legs, the bottom end of each supporting leg is fixedly connected with a supporting seat, the upper surface of the bottom plate is fixedly connected with an installation seat, an air blower is installed above the installation seat, and the air blower is installed above the installation seat. A connecting base is installed on the upper surface of the bottom plate, a burner body is installed above the connecting base, the air blower is connected with the burner body through a flange, and a cleaning assembly is installed on the upper surface of the bottom plate and comprises a U-shaped plate. According to the ultra-low nitrogen burner, through cooperative arrangement of the burner body, the air blower and the cleaning assembly, the arranged cleaning assembly not only can clean dust at a heat dissipation opening of the air blower body, but also can collect the cleaned dust in a centralized mode, and therefore the use effect of the follow-up air blower can be guaranteed; and normal use of subsequent devices can be ensured.

The invention provides the application of the rice OsH2B.8b gene in drought tolerance under high and low nitrogen conditions, the nucleotide sequence of the OsH2B.8b gene is shown as SEQ ID NO.1, and the OsH2B.8b gene is used for positively regulating and controlling the drought tolerance of rice. The amino acid sequence of the protein coded by the OsH2B.8b gene is as shown in SEQ ID NO. 2. According to the present invention, the OsH2B.8b gene is subjected to overexpression to obtain the OsH2B.8b overexpression plant, and in the drought treatment experiment simulated by 25% PEG6000, the survival rate of the OsH2B.8b overexpression plant is significantly increased compared with the wild type plant under the culture condition of the Mucun B nutrient solution with high nitrogen, i.e., the nitrogen concentration of 1 mM NH4 < + > and 1 mM NO3 <->; compared with a wild type plant, the OsH2B.8b overexpression plant has the advantage that the survival rate of the OsH2B.8b overexpression plant is obviously improved under the culture condition of the Mucun B nutrient solution with low nitrogen, namely the nitrogen concentration of 0.1 mM NH4 < + > and 0.1 mM NO3 <->. The OsH2B.8b gene has drought resistance under different nitrogen conditions, provides a gene resource for cultivating a new variety of drought-resistant rice, and is of great significance for crops to adapt to variable climatic environments.