1056 results about "Chlorophyll content" patented technology

Analysis of multi-spectral data for extraction of chlorophyll content. Multi-spectral data is obtained from an imaging device. The multi-spectral data contains spectral response data for chlorophyll and background data. The background data is removed from the multi-spectral data to isolate the spectral response due only to chlorophyll. This is then presented as a chlorophyll absorption feature which may be analyzed by measuring the width of the feature, the surface area of the feature, or measuring various angular changes of the feature. These measurements may than be used for a variety of purposes including plant health analysis.

The invention relates to a plant stress-resistant inducer, which takes Chitosan oligosaccharide solution as an effective active component. The invention adopts Chitosan oligosaccharide to induce crops to resist drought, waterlog, cold and freeze. Leaves of the crops are sprayed with the Chitosan oligosaccharide or roots of the crops are irrigated with the Chitosan oligosaccharide in order to induce the stress resistance (drought, waterlog, cold and freeze resistance) of the crops. By inducing the leaves of the crops, the content of resistant enzyme is increased in different degrees; the praline content is obviously increased; the opening degree of stomata obviously declines; the chlorophyll content is obviously increased; and the stress resistance of the crops is improved. The external application of the Chitosan oligosaccharide can improve the stress resistance of the crops, is free from toxicity, causes no environmental pollution, and is simple in usage.

The invention discloses a device for fast detection of chlorophyll content in leaf blades, a modeling method and a detection method. The device comprises a CCD camera, a hyperspectral scanner, an object stage, an electric control translation stage, a motion controller, a computer and a light source supply system with a feedback controller, wherein the CCD camera is connected with the hyperspectral scanner and used for collecting a spectral image of a crop loaded on the object stage scanned by the hyperspectral scanner; the computer is connected with the CCD camera and used for processing the spectral image and obtaining a prediction model for detecting the chlorophyll content; the motion controller is connected with the electric control translation stage, and the object stage is positioned on the electric control translation stage; the motion controller is used for adjusting the position, the translation speed and the translation distance of the electric control translation stage; and the light source supply system is used for providing a light source for the crop loaded on the object stage. The technical scheme of the invention can achieve the purposes of fast and pollution-free detection and has the advantages of high detection accuracy, low cost, simple structure of the detection device and good economic benefits.

The invention discloses a method for forecasting blue-green algae water bloom in a large-scale shallow lake within 72 hours. The method comprises the following steps of: building a content forecasting model of chlorophyll a in a water body and a probability forecasting model of water bloom generation according to an in-situ growth rate and drift rate parameters of blue-green algae; analyzing instant content of the chlorophyll a in a monitoring water area; distributing and acquiring meteorological information data in a monitoring period; inputting the built models; and outputting a predicted value of the concentration of the chlorophyll a in the monitoring water area in the next 72 hours and the water area and the probability of water bloom generation. The method disclosed by the invention has the advantages of strong operability, easily acquired parameters used for forecasting and high timeliness, and can be used for rapidly and accurately predicting breakout of the blue-green algae water bloom and forecasting the blue-green algae water bloom in a waterhead site and a vital landscape water area.

The invention relates to a leaf area index and chlorophyll content inversion method based on remote sensing image optimization PROSAIL model parameters. The method includes: downloading a remote sensing image and preprocessing the same to obtain multispectral canopy reflectance data; using a PROSAIL model to establish a lookup table according to different parameter combinations, and determining the relation of different parameters and canopy reflectance, namely an regression equation; establishing an objective function, combining the multispectral canopy reflectance data to optimize the parameters until a global minimum and a corresponding parameter combination of the objective function are obtained, and updating the parameters by the aid of the multispectral canopy reflectance data; and performing inversion according to the regression equation, the multispectral canopy reflectance data and the parameter combination, so that a leaf area index and chlorophyll content are obtained. The method extends a traditional method from points to surfaces, field observation data are not needed, cost of measuring the leaf area index and the chlorophyll content by the traditional method is effectively lowered, and inversion accuracy and speed are increased.

The invention relates to a multifunctional compound fertilizer capable of killing pests, preventing diseases and increasing yield. The preparation method of the multifunctional compound fertilizer comprises the following steps: firstly, respectively preparing a component A, a component B and a component C, wherein the component A is a vegetable insecticide, thecomponent B is a vegetable bactericide, and the component C is a vegetable growth promoting and yield increasing agent; after the three components are prepared, adding the finished product of the component C into a synthesis kettle for heating; then, sequentially adding the liquid medicine of the component A and the liquid medicine of the component B for continuously stirring, and keeping constant temperature; adding a penetrating agent JFC and polyethylene glycol into the synthesis kettle for stirring; and finally, adding a buffering agent for stirring and mixing uniformly, and homogenizing the mixture by a high-pressure homogenizer to obtain the finished product of the multifunctional compound fertilizer. The multifunctional compound fertilizer of the invention has very high insecticidal and bactericidal efficiencies, smaller toxic side effects and safety to people and livestock, promotes the growth and the development of plants, increases the chlorophyll content, and greatly improves the crop yield.

The invention discloses a nutritional compound enzyme used for crops, and the application thereof. The nutritional compound enzyme comprises proteases, phytase, amylases, cellulase enzymes and pectinase, and the like, is a compound formula of a plurality of enzyme preparations, can replace a plant growth promoter and improve soil texture, can provide nutritional substances, such as nitrogen sources and phosphorus and the like, for the counterbalanced growth of crops, lead the crops to become strong and absorb sufficient nutrient at the later growth stage, can improve the resistance against diseases of the crops, is beneficial to the growth and maturation of the crops and improves the output of the crops; the nutritional compound enzyme can convert cellulose into a part of oligosaccharides for improving the immunity of the crops and increasing the chlorophyll content of functional leaves of the crops, thereby improving the quality and output of the crops. The nutritional compound enzyme brings significant economic benefits for peasants.

The invention relates to a method for measuring chlorophyll content of fresh tobacco leaf of flue-cured tobacco based on canopy multi-spectra, which is characterized by comprising the following steps: measuring the canopy spectra of the flue-cured tobacco from a resettling stage to a budding early stage by a multispectral radiometer; establishing vegetation indices; measuring the chlorophyll content of the middle part of the reciprocal fifth leaf of the corresponding plant by a colorimetric method in a laboratory; establishing a model for inverting the chlorophyll content of the leaf by the canopy spectra parameters by a statistical method; measuring the canopy spectra parameters of a sample to be measured; and inputting the canopy spectra parameters into the model, thereby realizing measuring of the chlorophyll content of the flue-cured tobacco leaf. Compared with the prior art, the invention has the following advantages of in-situ measurement, no need of sampling, no injury to tobacco plants and no need of chemical reagents; compared with a hyperspectral radiometer, the invention has larger cost advantage and is more suitable for agricultural production; measurement can be finished only by acquiring data of a 550nm channel and a 730nm channel; and the data processing method and process are simple.

The invention relates to a chlorophyll content measurement method and an apparatus thereof. The method comprises the following steps: acquiring the chlorophyll content of a preset sample, and calculating a corresponding spectral vegetation index according to the hyperspectral reflectivity data of the preset sample; constructing a model of a predication relationship between the chlorophyll content of a vegetation to be measured and the spectral vegetation index according to the chlorophyll content of the preset sample and the corresponding spectral vegetation index; obtaining the hyperspectral reflectivity data of the leaf and canopy of the vegetation to be measured; calculating the spectral vegetation index of the vegetation to be measured by using a spectral index algorithm according to the hyperspectral reflectivity data; and inversing by adopting the pre-constructed predication relationship model according to the spectral vegetation index of the vegetation to be measured in order to obtain the chlorophyll content of the vegetation to be measured. An optical remote sensing technology is used in the chlorophyll content measurement field, so accurate, simple, fast and timely measurement of the chlorophyll content is realized, and the method and the apparatus are of great significance to monitor the growth vigor of crops and estimate the output.

The invention relates to an extracting method of a raft-type mari-culture area based on a high-resolution remote sensing image. The method is characterized by comprising the following steps of 1), a water area in a remote sensing image is extracted by adopting normalized difference water index (NDWI); 2), image segmentation is conducted on the water area, and the normalized differential vegetationindex (NDVI) of each plaque in the water area is calculated; 3), NDVI marked features of each plaque in the water area are calculated; 4), the distinguishing threshold value of a culturing area and an adjacent seawater area is set, and the mari-culture area is extracted according to the NDVI marked features obtained by calculation in step 3). According to the method, the characteristic that the normalized differential vegetation index (NDVI) is high due to the high chlorophyll content of raft-type cultured plants is utilized to propose an NDVI marked feature based on the combination of a fusion visual attention model and plaque segmentation, high-precision extraction of the raft-type cultured area is achieved, even though the background of the seawater is complicated and the culturing area is presented as a curved belt shape, and extraction can be achieved by conducting simple threshold segmentation on the NDVI marked features.

The invention belongs to the technical field of agricultural fertilizers, in particular to liquid bacterial manure produced by biogas slurry and a method thereof. The weight proportion of raw materials of the liquid bacterial manure is as follows: the ratio of biogas slurry to dry hyacinth powder to molasses fermentation wastewater to EM fungi is equal to 60-65 to 20-23 to 14.5-16 to 0.5-1.0. The EM fungi is adopted as a fermentation agent, so the liquid bacterial manure has a plurality of efficacies and characteristics: the liquid bacterial manure can be taken as a water flush fertilizer to spray roots of crops, can provide multiple kinds of nutrition and trace elements for the crops to promote the growing development of the crops, can be taken as a foliage fertilizer to improve the content of chlorophyll, strengthen the photosynthesis, improve the yield, can be taken as a nuisanceless cultivation nutrient fluid to realize the complete nuisanceless cultivation, and reutilize resources of the biogas slurry, hyacinths in rivers and domestic waste and is environment-friendly.

The invention relates to a watermelon seedling culturing substrate and a preparation method, and belongs to the technical field of agricultural seedling culturing. The watermelon seedling culturing substrate comprises the following raw materials of vegetable stubble compost products, grass carbon and vermiculite in a volume ratio of 3-5:1:2, wherein vegetable stubble comprises pepper stubble, cucumber stubble and common head cabbage stubble; and stubble is a plant to a plant tissue left in a field by human after finishing picking. The substrate is most suitable for watermelon seedling culturing; the root activity, the leaf chlorophyll content, strong seedling indicators and the early yield after field planting of cultured watermelon seedlings are superior to those of the watermelon seedlings cultured by using the conventional seedling culturing substrate. The seedling culturing substrate of the invention reduces the using amount of the grass carbon, contributes to saving grass carbon resources, fulfills the aims of resource utilization of the vegetable stubble and reduction of environmental pollution, and has obvious economic benefit, social benefit and ecological benefit.

The invention discloses a plant seedling culture matrix nutrition mother agent and application thereof. The plant seedling culture matrix nutrition mother agent comprises macro-elements, mesne-elements, micro-elements and rare earth elements; the macro-elements are nitrogen element, phosphorus element and potassium element; the mesne-elements are calcium element, magnesium element and sulphur element; the micro-elements are ferrum element, manganese element, copper element, zinc element and boron element as well as beneficial rare earth elements. The plant seedling culture matrix nutrition mother agent is simply prepared with low cost of finished products, and has the following functions: 1) facilitating nutrients absorption, guaranteeing the nutrient demand and nutrient balance supply before field planting in the period of young seedling and boosting the growth of the young seedling; 2) improving young seedling resilience capacity including anti-disease, anti-drought, anti-chilling and other capacities to achieve the aim of even and strong sprout; 3) continuously enhancing chlorophyll content and photosynthetic efficiency of crops; and 4) promoting root system to be developed and guaranteeing the nutrient absorption. The invention has significant economic value.

The sprayed fertilizer as one kind of biochemical fertilizer contains nitrogen fertilizer, phosphate fertilizer and potash fertilizer in 50-60 wt% as well as humic acid, trace elements, common elements, amino acids, biological bacterial preparation and foliage expanding agent in certain proportion. The sprayed fertilizer has the functions of activating enzyme, promoting leaf growth, raise chlorophyll, strengthening photosynthesis, promoting metabolish of carbohydrate, improving soil, raising crop's resistance, etc.

The invention belongs to the technical field of determining of tobacco field harvest maturity and harvest period, and relates to a method for determining the one-time harvest maturity of 5-6 tobacco leaves at the upper part of a tobacco by measuring the chlorophyll content (SPAD value) of the first, third, fifth or sixth leaves counted from up down of the tobacco. According to the method, 20 tobaccos are randomly selected from tobaccos of each mu planted, the first leaf, a chlorophyll measurement instrument is used for measuring the average of the contents of the first leaf, the third leaf, the fifth leaf or the sixth leaf at the upper of tobacco respectively, the measured average value is used as the maturity index complying with one-time harvest when the average value is 20-30 and the chlorophyll contents of the first leaf, the third leaf, the fifth leaf or the sixth leaf have no obvious difference, harvesting tobacco in fields can be carried out. The measuring method of the invention has definite index, has impersonal judgment index, and is easy to operate and master, and tobaccos harvested by using the method have good tobacco maturity and higher quality.

The invention relates to a plant growth adjusting composition containing triacontanol. The composition comprises active components A and B, wherein the active component A is selected from triacontanol and the active component B is selected from any one of the following compounds: benayl aminopurine, brassinolide, diethyl aminoethyl hexanoate and humic acid. The composition is mainly used for increasing the chlorophyll content of plants, maintaining greenness and preventing aging, accelerating development of the root systems, promoting effective absorption of fertilizers, assisting the inferior parts of the plants to grow well, enhancing absorption of water and fertilizers by the plant and adjusting balance of water in the plants, so that the drought resistance and cold resistance of the plants are improved.

The invention belongs to the technical field of photoelectric measurement, relating to a chlorophyll measuring apparatus. A mechanical structure part of the device comprises a light source, a T-shaped object stage and a sensor seat, wherein the light source contains a white light LED, the bottom of the sensor seat is provided with a color sensor, and a photophobic probe structure is formed by the light source, the object stage and the sensor seat; a circuit part of the apparatus comprises a light source module driving the white light LED, a digital signal sensor module and a digital signal processing and controlling module; the digital signal sensor module collects the light intensity information of red light, green light and blue light in probe light transmitting an object to be measured at different time by the color sensor, and transforms light intensity signals into square signals for outputting; the digital signal processing and controlling module captures the three square signals so as to obtain frequency signals representing the light intensity information of red light, green light and blue light, and simultaneously calculates the chlorophyll content in the objected to be measured according to the multiplex linear regression equation between the three frequency signals and the chlorophyll content. The apparatus has the advantages of simple and stable lighting source, relatively accurate measured chlorophyll content and the like.

The invention discloses an application of an activator protein prepared from Alternaria tenuissima by microbial fermentation to a pesticide preparation. The activator protein from Alternaria tenuissima which is prepared from Alternaria tenuissima by fermentation and special extraction processes is a single and stable protein with biological activities. The protein can be prepared with glucosamine oligosaccharides and related protein protectants into wettable powder, the protein can be combined with a receptor protein on a plant cell membrane, in order to induce increases of a series of related enzymatic activity and gene expression quantity in the plant, stimulate a series of metabolism regulation in the plant, promote growth of roots, stems and leaves of the plant, increase chlorophyll content, and increase crop yield. The wettable powder prepared by the protein from Alternaria tenuissima completely accords with each national index, and has the effects for preventing and controlling plant virus diseases, greatly improving physiological functions of plants, enhancing disease resistance of plants, and increasing crop output to a certain degree.