25 results about "Nitrogen accumulation" patented technology

The invention discloses an automatic crop nitrogen fertilizer accurate management method based on a remote sensing image, and relates to the technical field of accurate fertilization, the method comprises the following steps: obtaining ground measured data containing overground biomass and plant nitrogen concentration in a key growth period, and establishing a nitrogen dilution curve model through nonlinear least square fitting; uAV multispectral images are collected synchronously, a vegetation index matrix is calculated, a machine learning regression model is trained in combination with ground data, and an inversion model of overground biomass and plant nitrogen accumulation is obtained; acquiring a current-season image before topdressing, and performing pixel-by-pixel inversion to generate a biomass and nitrogen accumulation spatial distribution diagram; and calculating a critical nitrogen accumulation amount according to the nitrogen dilution curve so as to obtain a nitrogen nutrition index, calculating a recommended topdressing amount in combination with a preset basic topdressing amount and a nitrogen fertilizer utilization rate, and outputting a prescription map which can be directly imported into a variable fertilization machine. The method belongs to localized modeling and machine prescription map generation, the technical threshold is lowered, the nitrogen fertilizer utilization rate is increased, and environmental pollution is reduced.

The invention belongs to the technical field of fertilizers and relates to a compound fertilizer for black beans as well as a preparation method and application thereof. The compound fertilizer comprises a basic fertilizer, a microbial fertilizer and a trace element fertilizer, and a preparation method of the microbial fertilizer comprises the following steps: treating lignite with sophorolipid and trehalose lipid, treating turf with surfactin, mixing the treated lignite and turf, and then inoculating bacillus subtilis and rhizobium to obtain the microbial fertilizer. Through a unique dual mechanism of carrier synergism and fungicide function complementation, the dry matter cumulant and nitrogen cumulant of the overground part of the black bean are remarkably increased, and finally the yield and quality are remarkably improved.

The application provides a gene for improving nitrogen utilization efficiency of wheat under nitrogen deficiency conditions and application thereof, and belongs to the technical field of biological agriculture. The gene erf related to the nitrogen deficiency tolerance trait is obtained through normal nitrogen and nitrogen deficiency stress treatment of natural wheat varieties in the world and whole genome association analysis and verification. The erf gene not only responds to the up-regulated expression under the nitrogen deficiency stress of wheat, but also promotes the growth and nitrogen accumulation of wheat under the nitrogen deficiency conditions through a negative adjustment mode, so as to improve the nitrogen utilization efficiency of wheat. The erf gene provided by the application can effectively regulate the growth and nitrogen utilization of wheat under the nitrogen deficiency conditions, provides a new strategy for the construction and breeding of wheat varieties with nitrogen deficiency tolerance, and provides an effective site for the detection and variety identification of the wheat environment under the nitrogen deficiency.

This invention discloses a salt-tolerant Cladosporium 550W1 strain and its application in promoting nodulation and nitrogen fixation in leguminous plants, belonging to the field of microbial technology. The salt-tolerant Cladosporium (… Cladosporium halotolerans Cladosporium 550W1, deposited at the China General Microbiological Culture Collection Center (CGMCC) with accession number CGMCC No. 41943, provides a salt-tolerant Cladosporium 550W1 that can significantly promote nodulation and nitrogen fixation in legumes, increase plant biomass and nitrogen accumulation, and reduce dependence on chemical nitrogen fertilizers. It has broad application prospects and environmental and ecological benefits.

This invention provides a wheat Fd gene and its application in regulating nitrogen use efficiency in wheat under nitrogen deficiency conditions, belonging to the field of bio-agricultural technology. This invention screened 284 wheat varieties for nitrogen deficiency stress treatment to obtain the Fd gene associated with nitrogen deficiency tolerance. The Fd gene not only exhibits downregulated expression in response to nitrogen deficiency stress in wheat, but also promotes wheat growth and nitrogen accumulation under nitrogen deficiency conditions through negative adjustment, thereby improving wheat nitrogen use efficiency. The Fd gene provided by this invention can effectively regulate wheat growth and nitrogen use under nitrogen deficiency conditions, providing a new strategy for the construction and breeding of nitrogen-tolerant wheat varieties, and also providing an effective site for the detection and variety identification of nitrogen-deficient wheat environments.

The invention discloses application of a ZmAAAP64 gene in regulation and control of protein accumulation and nitrogen utilization of a whole corn plant, and belongs to the technical field of biology. The nucleotide sequence of the ZmAAAP64 gene is as shown in SEQ ID NO. 11. A BC2S3 population is constructed based on wild corn Ames21814 and a common corn inbred line B73 for QTL positioning, a key gene ZmAAAP64 for regulating and controlling the protein content and nitrogen utilization efficiency of the whole corn plant is excavated, structural variation analysis finds that in different corn population materials, insertion and deletion variations exist in a plurality of conservative intervals of a ZmAAAP64 gene promoter region, and the ZmAAAP64 gene promoter region has a high expression in the whole corn plant protein content and the nitrogen utilization efficiency of the whole corn plant protein content and the nitrogen utilization efficiency of the whole corn plant protein content and the nitrogen utilization efficiency of the whole corn plant protein content. The accumulation amount of Gln and Asn in the stem of the ZmAAAP64 gene overexpression material is increased by about 30-60%, and the protein content of the stem, the protein content of the leaf and the nitrogen accumulation amount of the whole plant are remarkably increased. And a technical means is provided for cultivating corn with high protein and high nitrogen utilization efficiency.

This invention discloses a desulfurization control system and method based on intelligent feedback and argon gas sealing protection. The desulfurization control system and method based on intelligent feedback and argon gas sealing protection belong to the field of metal melt refining technology. The system includes a ladle, a sealing cap with inert gas protection, a spray tank with a zoned fluidization structure, a composite long-life spray gun, and an intelligent control unit. The method performs desulfurization by establishing an inert atmosphere, sequentially fluidizing the powder in zones, inserting the spray gun, and adjusting the carrier gas flow rate in real time based on visual feedback. This invention achieves deep and efficient desulfurization, with a desulfurization rate of over 85%, while effectively preventing nitrogen accumulation, significantly extending the spray gun life, and improving the automation and safety of the entire process.

The application belongs to the technical field of plant molecular breeding, and provides a corn ZmAAP37 Gene in regulating corn agronomic traits and grain nitrogen accumulation, the application includes at least one of the following: (1) increase the nitrogen content of corn kernel; (2) increase the free amino acid content of corn kernel; (3) improve the aboveground biomass of corn plant; (4) increase the plant height of corn plant; (5) delay the leaf senescence of corn plant; (6) improve the nitrogen utilization rate of corn. The application shows that, ZmAAP37 By increasing the transport of amino acids in leaves to phloem, the nitrogen remobilization is promoted, and finally the grain nitrogen concentration is significantly increased without affecting the grain yield. The application provides ZmAAP37 The gene can provide new gene resources for nitrogen utilization of crops, especially corn, and has great application value in regulating nitrogen utilization of crops.

The application discloses a monitoring point layout optimization method and system based on regional scale nitrogen leaching, and relates to the field of agricultural environmental protection.The method comprises the following steps: acquiring a regional area and regional data; based on the regional data, drawing a slope grade map, a groundwater level grade map and a nitrogen accumulation map of the region respectively; performing pixel-to-pixel alignment, superposition and combination calculation on the slope grade map, the groundwater level grade map and the nitrogen accumulation map of the region to generate a plurality of basic units; under a constraint condition, performing initial layout of monitoring points in each basic unit according to the regional area, an obstacle layer and a preset monitoring point spacing; based on an average distance minimization criterion, constructing a target function of the monitoring points; and based on the target function, optimizing the monitoring points in the initial layout by using a space simulated annealing algorithm to obtain an optimized layout of the monitoring points.The application can improve the monitoring accuracy of regional scale nitrogen leaching and the layout efficiency of monitoring well points.

The invention discloses a modified compound fertilizer and a preparation method thereof, and relates to the field of compound fertilizers. Comprising the following components: a nitrogen-phosphorus-potassium basic fertilizer, a humic acid-sodium modified bentonite composite carrier, polyaspartic acid chelated trace elements, a biostimulant and a degradable hydrophobic membrane. The preparation method comprises the following steps: S100, spraying and granulating the nitrogen-phosphorus-potassium base fertilizer in a molten state; s200, sequentially spraying a humic acid-bentonite composite carrier, polyaspartic acid chelated trace elements and a biostimulant, and drying by a fluidized bed; and S300, mixing molten palm wax with sodium lignin sulfonate, coating the surface of a product obtained in the step S200 with the mixture through high-pressure spraying, and performing low-temperature curing to obtain the modified compound fertilizer. According to the invention, a dual slow-release mechanism is realized by utilizing ion exchange control between carrier layers and microcracks of the degradable hydrophobic membrane, and the nitrogen accumulation release rate within 60 days is less than 80%, so that a nutrient release curve is matched with crop requirements; meanwhile, the compression resistance of the particles is improved to 16.2 N, and the soil hardening condition is remarkably improved.

The invention belongs to the technical field of gene engineering, and particularly relates to a corn transcription factor ZmbHLH99 gene and application thereof. The nucleotide sequence of the corn transcription factor ZmbHLH99 gene provided by the invention is as shown in SEQ ID NO (Sequence Identity Number 1). Research results show that compared with ND101, after the corn transcription factor ZmbHLH99 gene is knocked out, the corn plant height and biomass can be remarkably increased, absorption of a corn root system to nitrogen is enhanced, the nitrogen accumulation amount in a corn body is increased, the nitrogen utilization efficiency is improved, corn ears are lengthened and thickened, and then the corn ear yield is increased.

The invention relates to a sorghum variety screening method, device and equipment and a storage medium. According to the main technical scheme, the method comprises the steps that multispectral images, actually-measured sorghum total nitrogen content and actually-measured sorghum biomass of multiple wave bands in the whole growth period of each sorghum field are obtained, the actually-measured sorghum total nitrogen content comprises the actually-measured spike total nitrogen content and the actually-measured leaf total nitrogen content, and the actually-measured sorghum biomass comprises the actually-measured spike biomass and the actually-measured leaf biomass; according to the actually measured spike total nitrogen content, the actually measured leaf total nitrogen content, the actually measured spike biomass and the actually measured leaf biomass, the ratio of the spike nitrogen accumulation amount to the maximum value of the leaf nitrogen accumulation amount is determined, and according to the ratio of the spike nitrogen accumulation amount to the maximum value of the leaf nitrogen accumulation amount and the multispectral images of the multiple wave bands, a nitrogen utilization efficiency evaluation model is constructed, and according to the multispectral image of each sorghum field parcel, based on a nitrogen utilization efficiency evaluation model, screening sorghum varieties of which the nitrogen utilization efficiency meets a preset condition, and realizing large-scale and multi-variety field sorghum rapid screening of varieties with efficient nitrogen utilization.

This invention discloses a device for preventing nitrogen accumulation in molten steel during the refining process of an LF furnace. The device includes an LF furnace body, a furnace cover, an argon gas filling pipe, and an argon gas distribution mechanism for injecting argon gas from the filling pipe into multiple locations within the LF furnace body. A baffle is installed inside the furnace cover, and the argon gas distribution mechanism is located below the baffle. The argon gas filling pipe passes through the furnace cover and the baffle. This device prevents nitrogen accumulation in molten steel during the LF furnace refining process by installing the furnace cover at the upper end of the LF furnace body. During steel refining, argon gas is introduced into the filling pipe by connecting it to an argon gas pipeline. The argon gas is then transported from the filling pipe to a circular pipe via a connecting pipe. Finally, the argon gas is evenly injected into the LF furnace body through jet nozzles, forming an argon gas protective layer on the uppermost surface of the molten steel. This effectively isolates the molten steel from contact with nitrogen in the air, thus preventing nitrogen accumulation. This invention also discloses a method for preventing nitrogen accumulation in molten steel during the LF furnace refining process.

The invention provides a drip irrigation cotton nitrogen fertilizer demand estimation method based on remote sensing diagnosis. The method comprises the following steps: S1, obtaining a Bayesian critical nitrogen concentration dilution curve; s2, plant nitrogen concentration remote sensing estimation: acquiring cotton growth data, unmanned aerial vehicle remote sensing RGB image data and meteorological data, estimating cotton plant nitrogen content (PNC) under each condition based on a Stacking ensemble learning model, and constructing a cotton plant nitrogen concentration estimation model; s3, nitrogen nutrition status diagnosis: calculating nitrogen accumulation deficiency (NAD) and nitrogen nutrition index (NNI) under different density conditions according to a universal critical nitrogen concentration dilution curve and a cotton plant nitrogen concentration estimation model; s4, dynamically predicting the nitrogen demand; S5, determining a precise nitrogen application scheme in the whole growth period of the cotton under different densities according to the nitrogen demand of the cotton under different density conditions; according to the method, the Bayesian critical nitrogen concentration dilution curve, the remote sensing diagnosis technology and the density effect are organically combined, and an overall solution suitable for precise management of drip irrigation cotton nitrogen under different density conditions is provided.

The invention discloses application of a ZmTCP20 gene in regulation and control of crop growth, development and yield, and belongs to the technical field of gene engineering. It is found that the corn TCP family member ZmTCP20 has the effect of directly and positively regulating the nitrogen utilization efficiency of crops, nitrogen absorption of the crops can be promoted through overexpression of the ZmTCP20 gene, the biomass and total nitrogen accumulation of plants can be remarkably increased, and the nitrate absorption capacity of root systems is improved; meanwhile, two-year field trials further show that the overexpression gene ZmTCP20 can significantly improve the plant height and biomass of crops, increase the nitrogen accumulation amount in the plants, enable crop clusters to be lengthened and thickened and further improve the yield of the clusters, and after the gene ZmTCP20 is knocked out, the contrary is that the overexpression gene ZmTCP20 is knocked out. The functional analysis of the gene ZmTCP20 provides important gene resources and theoretical guidance for the cultivation of new crop varieties with efficient nitrogen utilization.

The invention discloses an LNG (Liquefied Natural Gas) device for recovering methane through BOG (Boil Off Gas) denitrification by a low-temperature membrane method, which comprises a compressor, an aftercooler, a heat exchanger, a primary membrane separator and a secondary membrane separator, and the temperature of gas entering the two-stage membrane separator is-20 DEG C to-40 DEG C. According to the device, the low-temperature working condition is stably maintained by gas through cooperative pretreatment of the compressor, the aftercooler and the heat exchanger, and the separation selectivity of the membrane to methane and nitrogen is remarkably improved; by means of the two-stage membrane separation design, more than 75% of nitrogen in BOG can be efficiently removed, and the methane recovery rate of more than 85% is achieved. The device effectively reduces the nitrogen introduction amount of recovered BOG, ensures that the nitrogen content of a final LNG product is lower than 1mol%, meets the GB / T38753-2020 standard requirement, fundamentally avoids the problem of BOG emission due to nitrogen accumulation, greatly reduces methane loss, has the advantages of high separation efficiency, high resource utilization rate and high operation stability, and meets the BOG recovery treatment requirement of an LNG device.

The present application relates to the field of wisdom agricultural technology, disclose a kind of middle-low yield field hybrid rice canopy light nitrogen coupling high yield regulation method and system, the method includes: in tillering flourishing period to heading stage, obtain the real-time light transmittance of hybrid rice canopy;Based on the hysteresis compensation relationship of real-time light transmittance and leaf nitrogen accumulation quantity, construct nitrogen demand model, output target nitrogen application amount;According to target nitrogen application amount, generate nitrogen application timing instruction, the instruction includes fertilization time point and duration, and adjacent fertilization time interval is dynamically adjusted by light transmittance change rate;Nitrogen application timing instruction is executed and synchronously monitors leaf nitrogen accumulation quantity;Based on the dynamic deviation of leaf nitrogen accumulation quantity and preset nitrogen accumulation quantity threshold, the hysteresis compensation relationship of nitrogen demand model is feedback corrected before the next growth stage starts.The present application realizes the efficient coupling of canopy light resource dynamics and nitrogen precise supply, effectively improves the light nitrogen resource utilization efficiency of middle-low yield field hybrid rice.

The invention relates to the technical field of fertilizer production, in particular to a controlled-release fertilizer for mechanical transplanting of rice as well as a preparation method and application of the controlled-release fertilizer. The controlled-release fertilizer for mechanical transplanting of rice is prepared from the following raw materials in percentage by mass: 17%-21% of urea, 9%-13% of 40-day anti-floating controlled-release urea, 9%-13% of 80-day anti-floating controlled-release urea, 8%-12% of diammonium hydrogen phosphate, 18%-22% of potassium chloride and 27%-31% of calcium magnesium phosphate fertilizer. The formula of the controlled-release fertilizer provided by the invention is basically consistent with a'double-peak 'nitrogen accumulation absorption curve from the tillering stage and the ear differentiation to the heading stage of the rice, and can meet the nutrient requirements of the whole growth period of the rice, so that the yield of the rice is increased by 11-22%; the nitrogen fertilizer absorption and utilization rate is increased by 15%-16%; the net income of farmers is increased by 11%-25%, and the method has very high practical application value.

The invention belongs to the field of water pollution treatment, and provides a multi-stage treatment method for breeding tail water, which comprises the following steps: coarsely filtering the tail water, and discharging the tail water into a settling pond for settling treatment to obtain settled water; discharging the precipitated water into an aeration tank through a filter dam, and carrying out nitrogen removal treatment of nitrification and denitrification; whether a heat source of the aeration tank needs to be lowered or closed is judged by directly judging whether the area of the medium-temperature area is enlarged or not, a signal for controlling the temperature is accurately sent out, and the area of the medium-temperature area can be accurately controlled through temperature control, so that medium-temperature dominant bacteria are indirectly reduced, and the biodegradation efficiency of ammonia nitrogen is improved; the problems of nitrogen accumulation and emission in a greenhouse gas accumulation area in the water pollution treatment process are indirectly reduced.

The invention relates to the technical field of intelligent agriculture, and discloses a light-nitrogen coupling high-yield regulation and control method and system for hybrid rice canopies in medium and low yield fields, and the method comprises the steps: obtaining the real-time light transmittance of the hybrid rice canopies from the tillering stage to the heading stage; a nitrogen demand model is constructed based on the lag compensation relation between the real-time light transmittance and the leaf nitrogen accumulation amount, and the target nitrogen application amount is output; a nitrogen application time sequence instruction is generated according to the target nitrogen application amount, the instruction comprises the fertilization time point and the duration, and the adjacent fertilization time interval is dynamically adjusted according to the light transmittance change rate; executing a nitrogen application time sequence instruction and synchronously monitoring the nitrogen accumulation amount of the leaves; and based on a dynamic deviation between the leaf nitrogen accumulation amount and a preset nitrogen accumulation amount threshold value, feeding back a lag compensation relation of the corrected nitrogen demand model before the next growth stage starts. According to the method, efficient coupling of canopy light resource dynamic and accurate nitrogen supply is achieved, and the light and nitrogen resource utilization efficiency of hybrid rice in medium and low yield fields is effectively improved.

The application discloses a compound microbial inoculum capable of significantly promoting nitrogen absorption and utilization of peanuts and application thereof, and belongs to the technical field of microorganisms. The active bacteria in the compound microbial inoculum are composed of Sphingomonas melonis SPZ1 CCTCC No:M20241884 and Arthrobacter oryzae ARZ1 CCTCC No:M20241883. The two kinds of bacteria promote dry matter accumulation of peanuts through synergistic effect, and the nitrogen content of the aboveground and underground parts is obviously improved, especially the nitrogen accumulation amount of the whole peanut plant can be improved, and the utilization efficiency of nitrogen of the peanuts can be greatly improved when the compound microbial inoculum is applied to the peanut planting process.

The invention relates to the technical field of aquaculture process control, and discloses an aquaculture control method and system based on a low-carbon denitrification technology. The method comprises the steps that water quality sensors are arranged at different positions of a culture pond, key water quality parameters are collected in real time, and a water quality parameter set is generated; inputting the water quality parameter set into a machine learning model, outputting a nitrogen accumulation degree and determining a denitrification demand level, and if the nitrogen accumulation degree exceeds a preset range, determining a key nitrogen influence factor; in combination with the parameter set, the key factors and breeding variety information, the carbon source adding amount is calculated through a control algorithm, and differential carbon source adding instructions are generated through water quality space analysis; executing instructions in different areas and acquiring updated data to evaluate the denitrification efficiency, if the denitrification efficiency is insufficient, adjusting control algorithm parameters based on environmental data, forming a self-adaptive control strategy, regulating and controlling denitrification equipment, continuously monitoring the stability of the denitrification process, and if the denitrification process is not stable, performing cyclic optimization. The accuracy of denitrification control in the aquaculture process is improved.

The application discloses a summer maize nitrogen nutrition diagnosis method based on infrared thermal imaging technology, and is applied to the technical field of summer maize nitrogen nutrition diagnosis. The method comprises the following steps: obtaining summer maize canopy thermal imaging data under different heights, angles and time shooting modes at different growth periods respectively; synchronously measuring the above-ground plant biomass, nitrogen accumulation amount, leaf area index, leaf SPAD value and absorbed photosynthetically active radiation component of summer maize at different growth periods; analyzing the difference of summer maize canopy temperature image information and the relationship between the nitrogen nutrition index; determining the influence effect of the shooting mode on the canopy temperature and determining the optimal shooting mode; determining the critical temperature according to the relationship between the canopy temperature and the relative yield, and constructing a summer maize nitrogen fertilizer real-time topdressing model at different growth periods, so as to provide theoretical support and thought reference for the application and development of the near-ground infrared thermal imaging precision diagnosis of summer maize nitrogen nutrition.

The invention discloses Cladosporium halotolerans 550W1 and application thereof in promoting nodulation and nitrogen fixation of leguminous plants, and belongs to the technical field of microorganisms, the Cladosporium halotolerans 550W1 is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number of the Cladosporium halotolerans 550W1 is CGMCC No.41943. The invention further discloses a preparation method of the Cladosporium halotolerans 550W1 and application of the Cladosporium halotolerans 550W1 in promoting nodulation and nitrogen fixation of leguminous plants. The salt-tolerant cladosporium sp. 550W1 provided by the invention can remarkably promote nodulation and nitrogen fixation of leguminous plants, improve biomass and nitrogen accumulation of the leguminous plants and reduce dependence on chemical nitrogen fertilizers, and has wide application prospects and environmental ecological benefits.

The invention discloses a monitoring point layout optimization method and system based on regional scale nitrogen leaching, and relates to the field of agricultural environment protection, and the method comprises the steps: obtaining a regional area and regional data; based on the regional data, respectively drawing a slope grade map, an underground water level grade map and a nitrogen accumulation map of the region; performing pixel alignment superposition and combination calculation on the gradient grade map, the underground water level grade map and the nitrogen accumulation map of the region to generate a plurality of basic units; performing initial layout on the monitoring points in each basic unit according to the area of the region, the barrier layer and a preset distance between the monitoring points under a constraint condition; constructing a target function of the monitoring points based on an average distance minimization criterion; and based on the objective function, optimizing the monitoring points in the initial layout by adopting a space simulated annealing algorithm to obtain an optimized layout of the monitoring points. According to the method, the monitoring precision of regional scale nitrogen leaching can be improved, and the monitoring well point location layout efficiency can be improved.