69 results about "Nitrogen accumulation" patented technology

The invention belongs to the technical field of crop growing management and discloses a regulation and control method for rice nitrogen topdressing based on a nitrogen spectral index method. According to the invention, the nitrogen spectral index method is constructed according to nitrogen amount required by target rice yield, apparent utilization rate of spike fertilizer, plant real-time nitrogen accumulation amount estimated based on reflectance spectrum and soil nitrogen supplying amount while nitrogen fertilization based on a nutrient balancing principle. According to the invention, in the aspect of real-time information acquisition, plant canopy group information is utilized, thus the regulation and control method disclosed by the invention has the quicker and lossless characteristics and the like, thereby avoiding the phenomenon of point replacing surface; in the aspect of a nitrogen topdressing regulating and controlling model, the soil nitrogen supplying amount and nitrogen fertilizer utilization rate during the middle-late period are quantified, thereby enhancing the mechanism characteristic and accuracy of nitrogen topdressing amount estimation and improving the quantification level.

The invention provides a method, comprising the steps of: based on the instantaneity and wide regional coverage for obtaining remote sensing information, building a grain protein content prediction model based on nitrogen accumulation procedure via combining with the influencing characteristics of climatic environmental conditions in the flowering duration of wheat on the formation of grain quality; realizing the coupling of the remote sensing information and a grain protein content prediction model, namely using LAI (leaf area index), biomass and plant nitrogen content data inverted by flowering duration remote sensing images to displace the corresponding parameter variables of the wheat grain protein content prediction model, so as to realize the prediction for the protein content of single-point wheat grains, wherein the prediction precision is more than 85%; and drawing a graded monitoring and predicting thematic map for protein content of winter wheat grains by a scaling converting method of 'point' (the protein content of sample point grains) and 'face' (remote sensing images). The method has the characteristics of intuitionism and good timeliness, and has relatively good practicability for obtaining regional wheat quality information or guiding grain collection by department of agriculture.

The invention discloses a drip irrigation cotton field nitrogen application management method based on a GIS. The method comprises the steps that total nitrogen, organic matter and alkali-hydrolyzable nitrogen of soil are taken as data sources, partitioned management on drip irrigation cotton field nitrogen nutrients is achieved through a fuzzy c-mean clustering algorithm, on this basis, the application amount of nitrogen base fertilizer is determined by taking the alkali-hydrolyzable nitrogen of the soil as an index, canopy NDVI critical values of all the duration periods of cotton are determined on the basis of the nitrogen accumulation amount of leaves, and then the application amount of nitrogen topdressing is determined according to the NDVI critical values and actually measured values. The method has the advantages that the defects that due to the fact that the different nutrient contents are not taken into account in the traditional application process, application in the low nitrogen area is insufficient, and application in the high nitrogen area is excessive, and the crop growth and fertilizer waste are prevented from being influenced.

The invention discloses a high-precision monitor for crop growth information, comprising a spectrum sensor (1), a standard reflectivity white board (13), a signal collector (5), a shielding conductor (4) and a bracket, wherein the bracket consists of a horizontal bracket (2) and a movable supporting rod (3); the spectrum sensor is fixed at one end of the horizontal bracket; the other end of the horizontal bracket is movably connected with the movable supporting rod; the signal collector is fastened on the movable supporting rod and located at a height liable to observe by human eyes; the output end of the spectrum sensor is connected with the signal collector in series through the shielding conductor; and the standard reflectivity white board is arranged below the spectrum sensor and is perpendicular to the spectrum sensor. The invention further discloses a detection method based on the high-precision monitor for crop growth information. By using the high-precision monitor for crop growth information and the detection method, multiple growth indexes of nitrogen content, nitrogen accumulation amount, leaf area index and leaf dry weight of crops can be obtained losslessly in real time, the structure is simple, and the stability and the measuring precision of the high-precision monitor are improved.

The invention provides a rice leaf nitrogen accumulation remote sensing inversion model. The rice leaf nitrogen accumulation remote sensing inversion model is an extreme random tree model of Python language, and model parameters of the extreme random tree model are further provided. The invention further provides a rice leaf nitrogen accumulation remote sensing inversion method. According to the rice leaf nitrogen accumulation remote sensing inversion model, the nitrogen accumulation amount information of rice leaves can be rapidly and accurately obtained; the difficulty that the characteristic wave band of the rice leaf nitrogen accumulation amount is difficult to determine due to the spectral superposition effect caused by complex rice components is overcome, the precision of the rice leaf nitrogen accumulation amount inversion model is greatly improved, and the model is ingenious in design, simple and convenient in calculation, easy to implement and low in cost and suitable for large-scale popularization and application.

The invention provides a rice nitrogen fertilizer recommendation method based on a multispectral image of a fixed-wing unmanned aerial vehicle based on spectral data of the image of the fixed-wing unmanned aerial vehicle, which is used for recommending the nitrogen fertilizer application amount in a key growth period of rice topdressing. Through a rice field test, a rice plant nitrogen accumulation amount monitoring model is constructed, and a time sequence spectrum dynamic curve of the unmanned aerial vehicle is fitted. And a sufficient index nitrogen fertilizer recommendation algorithm is constructed by using the model and the curve, and the algorithm is verified through an independent test. According to the method, the spectral data characteristics of an unmanned aerial vehicle platform are fully considered, the nitrogen nutrition status of the rice in the key growth period can be accurately and nondestructively monitored through sensitive vegetation index screening and optimal curve fitting methods, and finally the accurate nitrogen fertilizer recommendation amount is given through the sufficient index algorithm in combination with the monitoring result and the unmanned aerial vehicle spectral characteristics. According to the method, an optimization approach is provided for precise nitrogen management of the rice, and important theoretical basis and technical support are provided for precise agricultural management and decision-making of a regional scale.

The invention provides an automatic steel ladle nitrogen adding device and an automatic steel ladle nitrogen adding method. On the basis of an original bottom-blowing argon system, a nitrogen source, a nitrogen stabilizing bag, a main nitrogen pressure gauge, a switching valve, a managing computer, a procedure computer, a PLC (programmable logic controller) and relative pipelines are added. When nitrogenous steel is produced, the PLC controls the switching valve according to a target nitrogen value provided by the procedure computer, when nitrogen accumulation does not reach the target nitrogen value, the switching valve is turned to a nitrogen open circuit state, when the nitrogen accumulation reaches to the target nitrogen value, the switching valve is turned to an argon open circuit state, and automatic switching between the argon and the nitrogen is realized. The defect of manual nitrogen adding is eliminated, the nitrogen content of thick nitrogenous steel plate blanks is precisely controlled within 0.008-0.015%, and the nitrogen content of thick plate products can be controlled according to the precision 0.01%, steel modifying loss is reduced, and steel grade yield and enterprise economic benefit are increased.

The invention discloses pseudomonas cannabina MBC1. The preservation number of the pseudomonas cannabina MBC1 is CGMCC No.10817, the preservation date is May 19, 2015, and the preservation organization is the China General Microbiological Culture Collection Center. The strain can still survive and breed and has nitrogen fixation activity under the conditions of drought, large temperature difference, salt and alkali disasters and strong ultraviolet radiation. An inoculant prepared with the pseudomonas cannabina MBC1 can be applied to ecological systems characterized in drought, large temperature difference, salt and alkali disasters and strong ultraviolet radiation to increase nitrogen accumulation of the ecological systems, improve the soil environment, improve the biological activity of microorganisms and plants, and improve net primary productivity.

The invention relates to an efficient excrement separation runway type circulating water culture device. The efficient excrement separation runway type circulating water culture device is characterized in that a separation plate is vertically mounted in a glass fiber reinforced plastic square tank and the length of the separation plate is smaller than the length of the glass fiber reinforced plastic square tank; two plugging plates II are vertically arranged on opposite sides of two ends of the separation plate respectively and are vertical to the separation plate; two inclined plates are arranged on two sides of the separation plate respectively, upper ends of the two inclined plates are fixed on side walls of the glass fiber reinforced plastic square tank respectively and lower ends of the two inclined plates are mounted at tops of the plugging plates II; and side faces of the inclined plates are sealed by the plugging plates I. An excrement deposition cabin is formed by the plugging plates I, the plugging plates II and wall faces of the glass fiber reinforced plastic square tank; and a blow-off hole is formed in the bottom surface of the excrement deposition cabin. The efficient excrement separation runway type circulating water culture device is simple in structure and can be used for discharging residual feed and excrement in a culture pond; and problems that ammonia and nitrogen accumulation and harmful pathogenic bacterium breeding are caused by residual feed and excrement deposition so that normal growth of culture objects is influenced, even the death is caused are effectively solved.

The invention discloses a multi-section buffer tank. The buffer tank comprises a buffer tank body, an air inlet pipe is arranged at the bottom end of the left side of the buffer tank body, an inspection hole is formed in the front face of the buffer tank body, a buffer net is arranged in the buffer tank body, and a first air pump is installed at the left side of the buffer tank body; and an air outlet of the first air pump is connected with the interior of an air outlet pipe, a second air pump is installed at the bottom end of the left side of the buffer tank body, a sealing plate is arranged in the air outlet pipe, and supporting blocks are welded in the right sides of the upper end and the lower end of the air outlet pipe. The buffer effect of the multi-section buffer tank is improved, the purity of nitrogen absorbed by gas equipment is improved, the working quality of the gas equipment is indirectly improved, nitrogen waste is avoided, cost is saved, benefits are improved, and potential safety hazards caused by more and more nitrogen accumulation in the buffer tank main body are avoided.

The invention discloses a free living nitrogen fixing bacterium massilia plicata MBC9. The preservation number of the free living nitrogen fixing bacterium massilia plicata MBC9 is CGMCC No.10825, the preservation date is May 19, 2015, and the preservation institution is China General Microbiological Culture collection Center. The strain can still live, breed and have nitrogen fixation activity under drought, large temperature differences, salt and alkali disasters and strong ultraviolet radiation. A microbial agent prepared from the free living nitrogen fixing bacterium massilia plicata MBC9 can be applied to ecological systems with drought, large temperature differences, salt and alkali disasters and strong ultraviolet radiation, can increase nitrogen accumulation in the ecological systems and can perform the function of improving soil environments and the physiological activity of microorganisms and plants and increasing net primary productivity.

The invention provides a deep cooling and film coupled ethylene cyclic refrigeration system non-condensed effluent gas separating and recycling technology, and belongs to the technical field of petrochemical engineering. According to the technology, starting from the characteristics of an ethylene cyclic refrigeration system, deep cooling conditions formed through ethylene throttling expansion areutilized for conducting liquidation and rectification on non-condensed effluent gas, most of ethylene is recycled in the form of the liquid state, then, a gas film is used for separating and enriching ethylene left in deep cooling tail gas, and low-pressure ethylene-rich gas obtained on the permeation side returns to a compressor of the ethylene cyclic refrigeration system. Deep cooling and filmseparation coupling is adopted for treating the non-condensed effluent gas, and ethylene losses are obviously reduced while oxygen and nitrogen accumulation is avoided. Taking a butyl rubber device of60,000 tons/year as an example, by adoption of the provided efficient non-condensed effluent gas separating and recycling technology, the ethylene content of the tail gas exhausted towards a torch islower than 5.0 vol%, the ethylene recycling rate reaches 99%, about 210 tons of ethylene can be recycled every year, and the annual economic benefits exceed 2 million yuan.