13 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.

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 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 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.