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47 results about "Stomatal conductance" patented technology
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By definition, stomatal conductance, usually measured in mmol m⁻² s⁻¹, is the measure of the rate of passage of carbon dioxide (CO₂) entering, or water vapor exiting through the stomata of a leaf. Stomata are small pores on the top and or bottom of a leaf that are responsible for taking in CO₂ and expelling water vapour. The rate of stomatal conductance, or its inverse, stomatal resistance, is directly related to the boundary layer resistance of the leaf and the absolute concentration gradient of water vapor from the leaf to the atmosphere. It is under direct biological control of the leaf through the use of guard cells, which surround the stomatal pore (Taiz/Zeiger 1991). The turgor pressure and osmotic potential of guard cells is directly related to the stomatal conductance. Stomatal conductance is a function of stomatal density, stomatal aperture, and stomatal size. Stomatal conductance is integral to leaf level calculations of transpiration (E). Multiple studies have shown a direct correlation between the use of herbicides and changes in physiological and biochemical growth processes in plants, particularly non-target plants, resulting in a reduction in stomatal conductance and turgor pressure in leaves.
Farmland environment multi-parameter intelligent monitoring system and method based on Internet of Things
The invention discloses a farmland environment multi-parameter intelligent monitoring system and method based on Internet of Things, particularly relates to the technical field of agricultural Internet of Things monitoring, and is used for solving the problem of stress resistance evaluation distortion caused by neglecting crop physiological recovery hysteresis in the prior art. Collecting soil water content data in real time through an Internet of Things sensor, and extracting a soil water content change rate when a preset threshold value is reached; secondly, constructing a space-time gradient matrix based on different soil layer water deficit rates, and generating a stress cumulative intensity index through principal component analysis and information entropy fusion; then analyzing a coupling relationship between the soil moisture change rate and the stress accumulation effect in the historical stress event on physiological recovery delay to generate a recovery delay coefficient; the physiological state lag degree is evaluated by combining the stomatal conductance change rate ratio of the stress period and the recovery period and the recovery delay coefficient; and finally, dynamically prolonging the irrigation execution time according to the lag degree until the irrigation execution time is lower than a set tolerance value, thereby remarkably improving the reliability of crop stress resistance test data.
Owner:广西农业职业技术大学 +1
Intelligent agricultural water-saving irrigation system and control method
The invention discloses an intelligent agricultural water-saving irrigation system and a control method, and relates to the technical field of agricultural irrigation. Comprising the following steps: a land area planning module performs equal-area division on a farmland, sets a detection node array, and monitors water retention conditions of different soil depths; the moisture gradient characterization module calculates the vertical moisture gradient and the direction of the vertical moisture gradient of the evaluation area in real time through edge calculation. And the irrigation water amount correction module fuses and generates a target water-holding capacity based on the leaf stomatal conductance signal and the moisture gradient. The irrigation circulation termination control module uses pulse type infiltrating irrigation, and sets double termination conditions of the water-holding capacity change rate and the permeability. The closed-loop feedback adjustment module detects the soil water content after irrigation, characterizes the water leakage risk and feeds back and adjusts the irrigation water amount, closed-loop control is formed, and effective utilization of water resources is ensured.
Owner:SUIHUA UNIV
Smart farm environment regulation and control method and system based on big data analysis
The invention relates to the technical field of agricultural management, in particular to a smart farm environment regulation and control method and system based on big data analysis, and the method comprises the following steps: obtaining an instantaneous temperature value of the upper surface of a leaf and an instantaneous temperature value of the lower surface of the leaf through an infrared temperature sensor, obtaining an instantaneous value of stomatal conductance through a stomatal conductance sensor; and acquiring a water vapor pressure difference value of the air cavity through a water vapor pressure sensor, aligning a time sequence by adopting a multi-source data fusion algorithm, eliminating noise, and generating a dynamic physiological data set. According to the method, the leaf temperature difference, the air hole conductance and the air cavity water vapor pressure difference are collected, a real-time dynamic data set is constructed, a temperature difference amplification signal is extracted, transpiration enhancement triggering, wind speed increasing, water mist particle size decreasing and wind speed and particle size linkage regulation and control are analyzed in combination with the trend, a regulation and control weight is constructed by introducing multiple regression analysis, and the wind speed and the particle size are dynamically regulated according to the weight. A leaf temperature difference regression base line is guaranteed, the regulation and control accuracy and physiological adaptability are improved, and the environment self-adaptive regulation capability is enhanced.
Owner:ANHUI SCI & TECH UNIV +1
Method for estimating water-carbon flux of terrestrial ecosystem by considering water balance constraint
ActiveCN120579351ADesign optimisation/simulationConstraint-based CADObservation dataGross primary productivity
The invention relates to the technical field of ecology and hydrology, in particular to a terrestrial ecosystem water carbon flux estimation method considering water balance constraint, which comprises the following steps: estimating leaf scale photosynthetic rate and stomatal conductance by utilizing a photosynthesis model; the leaf scale photosynthetic rate and the stomatal conductance are upscaled into canopy vegetation total primary productivity and canopy conductance to construct an evapotranspiration model to estimate evapotranspiration data; constructing a water balance model according to the evapotranspiration data so as to estimate the available water amount of the soil; constructing a soil moisture stress function according to the available water amount of the soil so as to constrain the estimation process of the photosynthesis model and the evapotranspiration model; and acquiring historical water-carbon flux data and historical remote sensing observation data of a long sequence daily scale, and calibrating the model to obtain a water-balance-constraint-considered water-carbon flux estimation model of the terrestrial ecosystem capable of estimating the water-carbon flux data. Therefore, the problems that an existing water carbon flux prediction frame is difficult to adapt to climate changes, low in prediction accuracy and the like are solved.
Owner:WUHAN UNIV
Method for predicting irrigation amount of crops in drought and saline-alkali soil area and related equipment
The invention discloses a method for predicting the irrigation amount of crops in an arid saline-alkali soil area and related equipment. The method comprises the steps that the potential evapotranspiration of a target crop is calculated through a double-source evapotranspiration mechanism model based on key meteorological parameters, obtained through prediction, of a target area, and the leaf area index and the plant height are dynamically updated according to the accumulated temperature process; respectively constructing different stress inhibition functions aiming at the attention salt ions and the pH value in the saline-alkali soil solution, and applying composite inhibition at the stomatal conductance and / or the apparent evapotranspiration resistance site to correct the potential evapotranspiration so as to obtain the ideal crop evapotranspiration corrected by the salinity and the pH value; and based on the corrected ideal crop evapotranspiration, predicting day-by-day irrigation amount and water distribution schedule suggestions in a future preset period. The method can solve the problem that current crop irrigation of saline-alkali soil in an arid inland region depends on experience, influences on different salt types and contents are caused, and quantitative analysis is lacked.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Real-time monitoring system and method for photosynthetic carbon sequestration data
The invention relates to the technical field of photosynthetic carbon sequestration, in particular to a photosynthetic carbon sequestration data real-time monitoring system and method, and the system comprises an evapotranspiration gradient recognition module, a photosynthetic rate change capture module, a non-cooperative state judgment module, a carbon sequestration fluctuation trajectory extraction module and a monitoring stability output module. According to the method, the response time point of the evapotranspiration process to the illumination change is dynamically positioned by obtaining parameters such as stomatal conductance, leaf surface temperature, saturation vapor pressure difference and transpiration rate of a leaf layer, the time point of sudden change of the physiological activity is marked, and the change of the transpiration rate and the change of the net photosynthetic rate are compared according to the difference range between the change of the net photosynthetic rate and the change of the transpiration rate. According to the method, the non-collaborative evapotranspiration function state can be judged, the possible response imbalance situation between leaf photosynthesis and moisture adjustment can be effectively recognized, the recognition capacity for the dysfunction time period is enhanced, the time window with low output stability is screened, and the dynamic adaptability and abnormal response judgment capacity of carbon sequestration monitoring data are enhanced.
Owner:ZHEJIANG INSTITUTE OF QUALITY SCIENCES
Wheat stripe rust multi-scale detection system and method based on unmanned aerial vehicle multi-spectral image
The invention relates to the technical field of intelligent agricultural remote sensing monitoring, in particular to a wheat stripe rust multi-scale detection system and method based on unmanned aerial vehicle multi-spectral images. Comprising an attitude compensation image registration module, a sheath and leaf boundary enhancement module, a stripe rust incubation period stripe extraction module, a canopy stomatal density inversion and mapping module and a three-dimensional space infection simulation module. Wherein the attitude compensation image registration module is used for eliminating flight attitude interference; the leaf sheath and leaf junction enhancing module is used for enhancing the structural boundary characteristics of a leaf sheath and leaf junction area; the stripe rust incubation period stripe extraction module is used for extracting disease incubation period stripe features; and the canopy stomatal density inversion and mapping module is used for inverting canopy stomatal conductance parameters. According to the method, by fusing multispectral image feature extraction, thermal infrared stomatal conductance inversion and three-dimensional space propagation modeling, multi-scale accurate detection and visual expression of the wheat stripe rust from incubation period identification to a spatial diffusion process are realized.
Owner:伊犁哈萨克自治州农业技术推广总站
Facility vegetable cultivation environment intelligent regulation and control system based on Internet of Things and multi-objective optimization algorithm
The invention relates to the technical field of intelligent agriculture and agricultural engineering, and particularly provides a facility vegetable cultivation environment intelligent regulation and control system based on the Internet of Things and a multi-objective optimization algorithm. The system comprises a blade microenvironment dynamic sensing subsystem which outputs and generates a blade boundary layer diffusion resistance-wind speed-temperature gradient real-time data set with space coordinates, namely a microenvironment state map; the stomatal conductance collaborative optimization subsystem outputs and generates an optimal airflow parameter combination packet which comprises a target wind speed vector, a temperature gradient threshold value and an expected stomatal conductance gain; and the bionic fluid tissue execution subsystem converts the optimal airflow parameter combination packet into a non-uniform airflow field, and microenvironment reconstruction is realized through a dynamic tuyere array. According to the method, the spanning of the facility environment regulation and control scale from the traditional greenhouse macroscale to the leaf micron scale is realized, the environment regulation and control precision is improved by 2-3 orders of magnitude, and a novel environment control normal form with both the disease prevention effect and the yield increasing potential is provided for facility vegetable production.
Owner:ANHUI TIANQIN AGRI TECH CO LTD
High-precision phenotype analysis system for plant growth stress response
PendingCN120950885AData processing applicationsColor/spectral properties measurementsSensor arrayBiology
The invention discloses a high-precision phenotype analysis system for plant growth stress response, and relates to the field of agriculture. Comprising a central analysis platform, and the central analysis platform comprises a calculation engine, a stress diagnosis model and a visual interface; the edge calculation stage comprises a data preprocessing module, a feature extraction module and a time sequence compression module; and the sensor array comprises a main control unit, a hyperspectral camera, a thermal infrared camera, a 3DDoF camera and an environment sensor group. Based on a space-time registration mechanism of transfer learning, errors are reduced, the problem of stomatal conductance modeling distortion caused by time difference is solved, a dynamic weight fusion model adjusts feature weights in real time through sensor confidence and environment fitness, illumination abrupt change and temperature and humidity fluctuation interference are eliminated, and the accuracy of stomatal conductance modeling is improved. Compared with a traditional fixed weight model, the stress identification precision is improved.
Owner:INST OF SOIL SCI CHINESE ACAD OF SCI
Fertilizing method and system for improving CO2 absorption efficiency of greenhouse plants based on SPAC system
The invention discloses a fertilization method and system for improving CO2 absorption efficiency of greenhouse plants based on an SPAC system. The method comprises the following steps: acquiring moisture information and environment information of the greenhouse plants through a biological environment information acquisition module deployed in a greenhouse; according to the obtained moisture information and environment information, the current leaf water potential and the saturation vapor pressure difference are calculated; calculating the stomatal conductance of the plant by combining the soil water potential and the atmospheric pressure according to the calculated current leaf water potential and saturation vapor pressure difference; and regulating and controlling water and CO2 fertilization of the greenhouse plants according to the stomatal conductance of the plants. By means of the method, under the condition that the evaporation intensity is too high, plant water stress can be weakened, stomatal opening is promoted, stomatal conductivity and mesophyll conductivity are improved, CO2 absorption and utilization are promoted, the photosynthesis efficiency of greenhouse fruits and vegetables can be effectively improved, and plant growth and yield formation are promoted.
Owner:SHANDONG AGRICULTURAL UNIVERSITY
Corn leaf stomatal measurement method based on anchor-free frame target detection and stomatal conductance calculation
This invention discloses a method for measuring stomatal conductance in maize leaves based on anchor-free target detection and stomatal conductance calculation, comprising the following steps: acquiring stomatal images of maize leaves; preprocessing, data augmentation, and stomatal labeling of the maize leaf stomatal images; constructing an optimal stomatal conductance model; constructing a deep learning model for stomatal identification and measurement, and training and testing the deep learning model. This invention improves upon the CenterNet target detection model, using DLA34 as the backbone network, replacing upsampled 2D convolution with deformable convolution, introducing an attention mechanism, and adding an angle prediction branch to automatically identify and measure stomata with tilt angles in maize leaf microscopic images. Simultaneously, a stomatal conductance loss function is introduced, and the optimal stomatal conductance model is used to automatically measure the stomatal conductance of maize leaves.
Owner:HENAN UNIVERSITY
A water-soluble red light carbon dot and its preparation method and application
A water-soluble red-light carbon dot and its preparation method and application, the method comprising the following steps: adding dicyandiamide and o-phenylenediamine to deionized water containing sulfuric acid and stirring for 20-30 minutes to form a suspension; placing the suspension in an autoclave and heating the reaction at 100-200°C for 6-12 hours to form a dark blue carbon dot solution; after cooling the dark blue carbon dot solution to room temperature, filtering it with a water-based microporous membrane and dialysis bag, respectively, to remove impurities and obtain pure water-soluble red-light carbon dots. This method has the advantages of simple process, easy operation, low cost, and no pollution, and can be used for industrial production; the prepared water-soluble red-light carbon dots are small in size, have good monodispersity, a graphene-like structure, and water solubility, and can significantly improve the absorption and transport of potassium and sodium ions by the roots of field crops under drought stress and salt stress, thereby increasing the photosynthetic rate and stomatal conductance of the crops and alleviating drought and salt stress in field crops.
Owner:XUZHOU NORMAL UNIVERSITY
Intelligent illumination control system for greenhouse plant growth
The invention relates to the technical field of facility agriculture and environment control, and discloses an intelligent illumination control system for greenhouse plant growth. In order to solve the problems that an existing light supplementing strategy lacks physiological feedback, light damage is easily caused, and shutdown is caused by sensor faults, the system comprises a multi-mode sensing assembly, a central processing unit and a dynamic spectrum execution assembly. The system collects crop non-photochemical quenching coefficients (NPQ) and environmental factors in real time, and dynamically calculates light saturation points by using a multi-factor coupling model; when the NPQ exceeds a threshold value, the spectrum ratio is automatically adjusted to inhibit light stress; three-dimensional canopy scanning is combined to realize gridding differentiation light supplement; when the sensor fails, virtual parameters are reconstructed based on the temperature trend to maintain fault-tolerant operation; in addition, the system estimates stomatal conductance according to air humidity and matrix conductivity, and dynamically corrects target light intensity to avoid aggravation of water deficit; accurate light supply according to needs is achieved, the photosynthetic efficiency and the system reliability are remarkably improved, and the system is suitable for plant factories and multi-span greenhouses.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY
Pugionium cornutatum PdMYB44 gene and application thereof
The invention belongs to the technical field of gene engineering, and particularly relates to a cornutgiella axataenae PdMYB44 gene and application thereof. The invention provides a cornutgiella dotacea PdMYB44 gene, wherein the CDS (Coding Sequence) of the PdMYB44 gene is as shown in SEQ ID NO. 1. The PdMYB44 gene disclosed by the invention is derived from the cornutgiium axataenense, so that the drought resistance of a transgenic plant can be improved, the flowering time is shortened, and the PdMYB44 gene can be applied to plant stress resistance genetic improvement. Results of embodiments show that according to a transgenic plant over-expressing the PdMYB44 gene, the proline content is increased, the malondialdehyde content is reduced, the transpiration rate and stomatal conductance are remarkably reduced, and the drought resistance of the transgenic plant is jointly improved by synergistically regulating three key mechanisms, namely accumulation of permeation protection substances, inhibition of membrane damage and optimization of stomatal behaviors.
Owner:INNER MONGOLIA AGRICULTURAL UNIVERSITY
Method for improving survival rate of forsythia tender branch cutting seedling
This invention belongs to the field of plant seedling technology, specifically relating to a method for improving the survival rate of Forsythia suspensa cuttings. Specifically, fruiting mother trees are selected, and semi-lignified branches of the current year are collected as cuttings, retaining plump buds. The cuttings are soaked in a rooting agent compound solution and then dried for later use. The treated cuttings are then inserted into a gradient substrate and thoroughly watered after planting. The stomatal conductance of the cutting leaves and the electrical conductivity at the base of the cuttings are monitored in real time. The substrate temperature, spraying frequency, shading rate, and ventilation are adaptively adjusted in a closed-loop manner according to the physiological thresholds of different rooting stages of Forsythia suspensa cuttings. Stress-resistant fertilizer is applied according to the physiological state of the cuttings, and disease control and daily management are carried out. This method improves the survival rate of Forsythia suspensa cuttings, reduces the rate of cutting rot, exhibits strong environmental adaptability, and high seedling stability.
Owner:LONGNAN HONGFENG AGRICULTURAL SCIENCE & TECHNOLOGY CO LTD
Data-driven actual evapotranspiration estimation method fusing vegetation biophysical characteristics
The invention discloses a data-driven actual evapotranspiration estimation method fusing vegetation biophysical characteristics, which comprises the following steps: firstly, collecting actually measured meteorological and remote sensing data of a flux tower station, and carrying out quality control and energy balance correction to obtain an actual evapotranspiration reference value; then, a PMLV2 model is constructed station by station based on the processed data, and vegetation biophysical characteristic variables such as stomatal conductance are obtained through simulation; summarizing the features with meteorological and remote sensing data to form an input factor set, and summarizing training sets and test sets of all stations according to vegetation types; and finally, taking the factor set as input, constructing an LSTM actual evapotranspiration estimation model by using the training set, and evaluating the precision of the model through the test set. According to the method, vegetation biophysical characteristic variables simulated by the PMLV2 model are fused, so that the adaptability and generalization ability of the data driving model when environmental conditions change are enhanced, and the problems of overfitting and performance reduction when samples are scarce or representativeness is insufficient in a traditional data driving method are effectively relieved.
Owner:NANJING HYDRAULIC RES INST
Dense and reverse-resistant planting breeding strategy optimization system and corn breeding method
This invention relates to the field of planting and breeding technology, specifically to an optimization system for planting and breeding strategies that promotes high density and stress tolerance, and a method for maize breeding. In this invention, by running a support vector machine to compare proline concentrations and eliminate low-value entries, the limitations of traditional empirical breeding sample quantity are overcome, enabling precise solution of the targeted gene array for extreme stress resistance potential. By calling the array node coordinates and merging preset ear height and leaf angle parameters into the state tensor, a graph attention network is introduced to calculate the attention weight coefficients between multiple dimensional parameters, completing precise modeling of spatial mutual occlusion and competition constraints among multiple plant individuals under extreme ecological niches, maintaining the peak photosynthetic yield of the population at full environmental density. By analyzing the stomatal conductance sequence within the array to extract the inverse gradient multiplied by the negative penalty coefficient, the shared stress-resistance biological abstraction characteristics across ecological niches are extracted, enhancing the robustness of phenotypic prediction under extreme habitats, and transforming biological pollination risk into a strict mathematical convergence constraint.
Owner:HUBEI UNIV +1
A grid scale crop yield prediction method based on air quality mechanism
This invention discloses a grid-scale crop yield prediction method based on air quality mechanisms, belonging to the field of agricultural remote sensing technology. The method includes the following steps: S1, dividing the study area into grids and collecting basic data, then preprocessing the basic data sequentially; S2, constructing a physiological regulation function based on the preprocessed basic data and determining stomatal conductance; S3, determining air quality mechanism indicators and pollutant mechanism indicators based on stomatal conductance; S4, determining the predicted crop yield based on the air quality mechanism indicators and pollutant mechanism indicators, and outputting the baseline yield, total loss, relative loss rate, pollutant contribution rate, and spatially aggregated total yield. The final prediction target variable of this invention is yield, suitable for large-scale yield estimation at the grid scale; it can be used for grid-scale crop yield estimation, air pollution-induced damage assessment, and risk analysis.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY
Application of nano-material composite plant growth regulator in improvement of stress resistance of rice and inhibition of magnaporthe oryzae
The invention discloses application of a nano-material composite plant growth regulator to improvement of rice stress resistance and inhibition of magnaporthe oryzae. The plant growth regulator is prepared from magnesium ions and a nano material ZIF-8. The conditioning agent has the advantages that the conditioning agent can effectively inhibit the growth of magnaporthe oryzae hyphae and the formation of appressorium, and the morbidity of the magnaporthe oryzae can be remarkably reduced by mixing the conditioning agent with magnaporthe oryzae conidia to be sprayed and inoculated to rice leaves; meanwhile, the regulator can activate an anti-oxidation defense system of rice and enhance the stress resistance of plants. After the fertilizer is applied in a magnesium-deficient environment, key physiological indexes such as plant height, chlorophyll content, stomatal conductance, normalized difference vegetation index, maximum photochemical efficiency and the like of rice plants can be remarkably improved, so that the growth state of the rice plants is recovered to a normal level. Biosafety verifies that the regulator is non-toxic and environment-friendly to rice, and pollution caused by traditional chemical pesticides can be reduced.
Owner:FUJIAN AGRI & FORESTRY UNIV
Application and method for promoting photosynthesis of tobacco by using root-specific promoter and HMA3 gene
The invention discloses application and method for promoting tobacco photosynthesis by using a root specific promoter and an HMA3 gene, and belongs to the field of plant genetic engineering, a gene expression cassette pRCc3-HMA3-OCS is constructed by using the root specific promoter pRCc3 and the HMA3 gene of rice, the overexpression of the rice HMA3 gene in tobacco is driven by using the root specific expression promoter pRCc3, and the tobacco photosynthesis is promoted by using the HMA3 gene. The plant height and leaf area of the overground part of the tobacco under normal or stress conditions are obviously improved, the photosynthetic efficiency, transpiration speed and stomatal conductance of the tobacco can be obviously improved, and photosynthesis of the tobacco is promoted, so that the photosynthetic yield of the tobacco is improved; more theoretical bases and application values can be provided for regulating and controlling the leaf growth and improving the photosynthetic efficiency of tobacco and other commercial crops with harvested leaves.
Owner:HENAN UNIV OF SCI & TECH
Method for predicting crop irrigation amount in arid saline area and related device
The application discloses a crop irrigation amount prediction method in arid and saline-alkali regions and related equipment. The method comprises the following steps: calculating the potential evapotranspiration of the target crop based on the predicted key meteorological parameters of the target region through a dual-source evapotranspiration mechanism model, and dynamically updating the leaf area index and plant height according to the accumulated temperature process; constructing different stress inhibition functions for the concerned salt ions and the pH value in the soil solution of the saline-alkali soil, respectively, applying a composite inhibition at the stomatal conductance and / or apparent evapotranspiration resistance site to correct the potential evapotranspiration, and obtaining the ideal crop evapotranspiration corrected by the salt and pH value; and predicting the daily irrigation amount and water distribution schedule suggestion within a future preset period based on the corrected ideal crop evapotranspiration. The method can solve the problem that the current crop irrigation in arid inland saline-alkali areas relies on experience and lacks quantitative analysis of the influence caused by different salt types and contents.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Application of TaGRF2-A gene in enhancing heat resistance of wheat
The invention relates to application of a TaGRF2-A gene in enhancing heat resistance of wheat, and belongs to the field of plant genetic engineering. Specifically, the wheat TaGRF2-A gene participating in positive regulation and control of high-temperature stress resistance is cloned in wheat, so that the wheat TaGRF2-A gene is overexpressed, and compared with a wild plant, a wheat plant with the overexpressed TaGRF2-A gene shows higher high-temperature resistance; the TaGRF2-A gene enhances the tolerance of wheat under a high-temperature condition in manners of regulating the stomatal conductance of plants, optimizing the photosynthesis efficiency, improving the water utilization efficiency and the like, and a new genetic engineering modification means is provided for cultivating a new wheat variety with high yield, stable yield and high temperature resistance.
Owner:XIANGHU LABORATORY
Bayesian inference-based high-temperature stress vegetation stomata adjustment modeling system and method
The invention discloses a Bayesian inference-based high-temperature stress vegetation stomata adjustment modeling system and method, and relates to the technical field of ecological process simulation. A data acquisition module is used for acquiring and preprocessing meteorological driving data; the stomatal conductance calculation module is used for calculating basic stomatal conductance based on a Jarvis stomatal conductance empirical model; the high-temperature stress correction module is used for correcting Rubisco enzyme related parameters based on a temperature power function and constructing a high-temperature stress stomatal conductance correction function through a Logistic function; the correction parameter inversion module is used for inverting optimal parameters in combination with the actually measured carbon water flux data, the Bayesian theorem and the Monte Carlo-Markov chain algorithm; and the carbon-water flux simulation module is used for substituting the optimal parameters into a high-temperature stress stomatal conductance correction function to perform high-temperature stress correction on the basic stomatal conductance, and after the corrected stomatal conductance is obtained, the corrected stomatal conductance is coupled to the ecological process model to simulate the carbon-water flux process. The simulation precision of the model at extreme high temperature can be improved.
Owner:INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE CAAS
Substituted furanones and use thereof for agricultural applications
Methods and agricultural formulations for the cultivation of plants such as broad acre crops, fruits and vegetables, perennial tree crops, and ornamentals are described. The methods include contacting the plant with a furanone compound according to Formula I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII, XIII, or XIV as described herein, or a salt or solvate thereof. The methods can provide cultivated plants exhibiting reduced levels of non-photochemical quenching (NPQ), higher levels of carbon fixation, higher levels of carbon storage, increased quantum efficiency, and / or increased stomatal conductance, leading to increased biomass and / or increased crop yields. Furanone compounds and agricultural formulations containing the compounds are also described.
Owner:SOUND AGRICULTURE CO
Three-dimensional rotary gas recovery and acoustic suspension microgravity gas-thermal environment simulation cultivation method
PendingCN122172914AClimate change adaptationGreenhouse cultivationMicrogravity SimulationProcess engineering
The application discloses a three-dimensional rotary gas recovery and acoustic suspension microgravity gas-thermal environment simulation cultivation method, and relates to the technical field of microgravity environment simulation. The method comprises the following steps: establishing a microgravity simulation cultivation experiment system based on acoustic suspension, gas recovery and RPM double closed-loop control; first closed-loop control: monitoring the environment parameters of the cultivation cabin, calculating the key physiological parameters based on the gas exchange diagnosis model; comparing with the first preset target to dynamically regulate the acoustic field parameters of the acoustic suspension and the environment parameters of the cultivation cabin; second closed-loop control: obtaining the multispectral image of the plants in the cultivation cabin to extract the phenotype data; comparing the phenotype data with the second preset target to correct the parameters of the stomatal conductance prediction model and the first preset target. Through the double closed-loop control mechanism, the traditional physical environment reproduction is innovated into an intelligent experiment system for actively studying and optimizing the physiological response of plants, and the problem that the environment simulation is disconnected with the physiological effect is solved.
Owner:INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE CAAS
Preparation method of detoxified sweet potato seedling
The application provides a preparation method of detoxified sweet potato seedlings, comprising the following cultivation steps: washing sweet potatoes, placing the sweet potatoes in a sterilization liquid to accelerate germination, disinfecting the newly born stem tips, placing the stem tips in a culture medium I to culture, and obtaining sweet potato stem tips; when the sweet potato stem tips grow 4-5 leaves, the stem tip meristem is inoculated into a culture medium II, and the culture is carried out to 8-9 stem segments, and sweet potato seedlings are obtained; the sweet potato seedlings are transplanted to a seedling raising tray containing a nutrient medium, and the seedlings are cultured in an artificial climate chamber for 30-35 days, and then the seedlings are transplanted into soil for breeding. The preparation method of the detoxified sweet potato seedlings significantly improves the growth condition of the sweet potato seedlings, increases the plant height, the number of root systems and the length of root systems of the sweet potato seedlings, and significantly improves the net photosynthetic rate (Pn) and the stomatal conductance (Gs) of the detoxified sweet potato seedlings, which is beneficial to the healthy growth of the sweet potato in the seedling stage.
Owner:CHANGJIANG GUANGLING AGRI TECH CO LTD
Pezicula ericae XA4 and its application
The present invention relates to the field of microbial technology, and in particular to a strain of Pezicula ericae XA4 and its application. The present invention provides a strain of Pezicula ericae XA4, which was deposited in the General Microbiology Center of the China Microorganism Culture Collection Administration on June 26, 2024, with a deposit number of CGMCC No.41350. The XA4 provided by the present invention was back-grafted on aseptically cultured Dahurian rhododendron seedlings, and trypan blue staining was used to detect that mycorrhizal fungi could be back-grafted successfully. Compared with the uninoculated strain, the inoculation of XA4 had the most significant growth-promoting effect on Dahurian rhododendron. Its plant height, leaf length, leaf width, root length, biomass, chlorophyll content, net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate, and root activity were all improved compared with the uninoculated strain.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY
Bayesian inference based high temperature stress vegetation stomatal regulation modeling system and method
The application discloses a high-temperature stress vegetation stomatal regulation modeling system and method based on Bayesian inference, and relates to the technical field of ecological process simulation, wherein: a data acquisition module is used for collecting and preprocessing meteorological driving data; a stomatal conductance calculation module is used for calculating basic stomatal conductance based on a Jarvis stomatal conductance empirical model; a high-temperature stress correction module is used for correcting Rubisco enzyme related parameters based on a temperature power function, and constructing a high-temperature stress stomatal conductance correction function through a Logistic function; a correction parameter inversion module is used for inversing optimal parameters in combination with measured carbon flux data, Bayesian theorem and a Monte Carlo-Markov chain algorithm; and a carbon flux simulation module is used for substituting the optimal parameters into the high-temperature stress stomatal conductance correction function to correct the basic stomatal conductance under high-temperature stress, obtaining corrected stomatal conductance, and then coupling to an ecological process model to simulate a carbon flux process. The application can improve the simulation accuracy of the model under extreme high temperature.
Owner:INSTITUTE OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT IN AGRICULTURE CAAS
Application and method for promoting photosynthesis of tobacco by enhancing MT2c gene expression through double promoters
PendingCN121950826AImprove photosynthetic efficiencyhigh speedClimate change adaptationFermentationBiotechnologyDual promoter
The invention relates to application and a method for promoting photosynthesis of tobacco by enhancing MT2c gene expression through double promoters and belongs to the field of plant genetic engineering, the MT2c gene is overexpressed in the tobacco by constructing a gene expression cassette pActin-MT2c-OCS, or gene expression cassettes pActin-MT2c-OCS and p35S-MT2c-T35S are respectively constructed, and the MT2c gene is respectively driven to be overexpressed in the tobacco by a strong promoter 35S and an Actin promoter, so that the photosynthesis of the tobacco is promoted. The photosynthetic efficiency, the transpiration speed and the stomatal conductance of the tobacco can be obviously improved, and the photosynthesis of the tobacco is promoted; and the promotion effect is not limited to resistance to abiotic stress, and the photosynthetic yield of plants can be effectively improved in a pollution-free environment without abiotic stress.
Owner:HENAN UNIV OF SCI & TECH