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28 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.
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
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
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
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
Evapotranspiration calculation method considering the effects of soil moisture and carbon dioxide
The application discloses a kind of evapotranspiration calculation methods considering soil moisture and carbon dioxide influence, specifically: collection flux station observed meteorological information and vegetation water carbon flux information;Carbon dioxide stress function to leaf stomatal conductance and soil moisture stress function to stomatal conductance are constructed;Based on the stress function constructed, canopy conductance parameterization model is constructed, and canopy resistance is obtained;Through the canopy resistance of parameterization land surface process and aerodynamic resistance, the water and heat flux transport model of soil-vegetation-atmosphere continuum is constructed, and latent heat flux is calculated;Through the latent heat flux observed by flux station, the parameters in water and heat flux transport model are optimized;The optimized parameters are substituted into water and heat flux transport model for calculation, and latent heat flux and canopy conductance value are obtained.The application improves the accuracy of evapotranspiration estimation under the condition of rapid environmental change, and provides a reliable tool for water resource management, ecological assessment and climate research.
Owner:NANJING HYDRAULIC RES INST
Rice seedling carbon-water coupling dynamic simulation method
PendingCN121723698AChemical processes analysis/designDesign optimisation/simulationWater savingAgricultural engineering
The invention discloses a rice seedling carbon-water coupling dynamic simulation method, and relates to the technical field of agriculture and environmental science. According to the method, on the basis of a rice carbon-water source flow coupling model (CWS), a dynamic correlation equation of carbon assimilation and stomatal conductance is constructed, and intercellular COconcentration is taken as a core coupling hub, so that physiological equilibrium simulation of carbon absorption-water consumption of rice seedlings is realized. According to the technical key points, a CWSM model equation system is established, and the net photosynthetic rate and the stomatal conductance are calculated; building a carbon-water coupling equation in a three-dimensional seedling raising factory environment, and solving and balancing An and gs through iteration; and based on the dynamic association of An and the transpiration rate, the moisture utilization efficiency is mechanically quantified. According to the method, through closed-loop coupling and iterative optimization, the carbon-water collaborative response of the rice seedlings in a factory environment is accurately captured, a quantitative tool is provided for environment regulation and control, water-saving management and high-yield cultivation of three-dimensional seedling raising, and the precision of WUE simulation in a complex environment is remarkably improved.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY
A device for testing the wet damage tolerance of rape
The present application relates to a kind of rape wet damage tolerance experimental device, including two planting boxes, two planting boxes are all equipped with photosynthometer, planting groove, light source, temperature sensor, air conditioning system, humidity sensor, humidity regulator and water supply system;The method for carrying out rape wet damage tolerance evaluation is: in two planting grooves, all rape is planted, the temperature, humidity and illumination of two planting boxes are kept same, the soil of the rape in one planting groove is flooded by water at 3-4 leaf stage and is planted to wet damage to test end, another planting groove is planted healthily, on the fifth day and the sixth day of water flooding, the average number of two days of stomatal conductance of wet damage planting rape and healthy planting rape is obtained by the stomatal conductance detection of photosynthometer to two planting boxes.This application aims to provide a kind of rape wet damage tolerance experimental device, which is environment-controllable and can quickly and accurately judge the wet tolerance of rape, solves the problem that the environment is uncontrollable when testing the wet tolerance of rape, the data accuracy is poor and the experimental time is long.
Owner:ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
A light environment regulation system for plant factories based on photosynthesis simulation and spectral superposition
This invention discloses a plant factory light environment control system based on photosynthetic simulation and spectral superposition, belonging to the field of smart agriculture technology. It addresses the shortcomings of existing light environment control systems that neglect the influence of the light-induced phase of photosynthesis on the photosynthetic rate and fail to consider the varying P values under different environmental conditions during the dark reaction phase of photosynthesis. nmax This invention addresses the issue of differences in light saturation points. The system comprises: a data acquisition module, a control module, a full-spectrum light source regulation module, an execution module, a monitoring module, and a power supply module. The control module employs a two-stage control strategy: in the light-induction stage, by regulating the photosynthetically active radiation intensity and illumination time, the Fv / Fm ratio and stomatal conductance are controlled to reach normal values; in the dark reaction promotion stage, by constructing a regulation model, based on the collected CO2 concentration, temperature, photosynthetically active radiation intensity, and the achieved normal stomatal conductance value, the net photosynthetic rate is calculated, and the maximum net photosynthetic rate, light saturation point, and dark respiration rate are determined.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY
Application of PtNPF6.4 gene in enhancing low nitrogen stress resistance of poplar
The invention relates to an application of a PtNPF6.4 gene in enhancing low nitrogen stress resistance of poplar, and by creating a PtNPF6.4 gene overexpression and knocking out a transgenic poplar material, the nitrogen content of a PtNPF6.4 overexpression strain under a low nitrogen stress condition is improved, and the plant height, the leaf number, the biomass and the root development are remarkably improved; meanwhile, the plant shows higher net photosynthetic rate, stomatal conductance and transpiration rate. The gene effectively promotes nitrogen absorption of the poplar under low nitrogen stress, the photosynthesis of the poplar is remarkably improved, the growth and development of the poplar are further promoted, and the low nitrogen stress resistance of the poplar is enhanced. The important function of the PtNPF6.4 gene in the aspect of remarkably improving the low nitrogen stress of the poplar is found for the first time, a theoretical basis and an excellent candidate gene are provided for efficient nitrogen breeding of forest trees, and the PtNPF6.4 gene has important theoretical and practical significance in directional breeding of artificial wood trees and accurate improvement of forest quality.
Owner:HUAZHONG AGRI UNIV
Method and system for monitoring and predicting plant diseases and insect pests of greenhouse vegetables based on Internet of Things
The invention relates to the technical field of smart agriculture and agricultural Internet of Things, and discloses a method and system for monitoring and predicting facility vegetable diseases and insect pests based on Internet of Things, and the method comprises the steps: firstly, measuring the heat plume transmission delay time; an active photo-thermal excitation unit is controlled to emit a modulation light signal, heat wave propagation is generated in the blade, and directional thermally induced convection plume is induced; setting a holographic capture phase window based on the delay time, and cooperatively acquiring a blade surface infrared image sequence and an aerosol particle diffraction pattern; thermal impedance characteristics reflecting stomatal conductance are extracted through digital phase locking operation, and pathogen concentration is identified through holographic reconstruction; and finally, fusing thermal impedance and pathogen concentration information to carry out multi-dimensional judgment. According to the method, the physiological status and pathogen information of the plant are synchronously obtained by utilizing a heat flow coupling mechanism, non-infectious physiological stress and early disease infection are effectively distinguished, and accurate and active monitoring and early warning of the plant diseases and insect pests of the greenhouse vegetables are realized.
Owner:HENAN YUANFENG TECH NETWORK CO LTD
A method of growing a leafy vegetable
The application provides a leafy vegetable plant cultivation method, comprising the following steps: providing seedlings of target leafy vegetable plants; cultivating the seedlings of the target leafy vegetable plants under preset cultivation conditions to obtain target leafy vegetable plant plants; wherein the preset cultivation conditions comprise: during the cultivation of the seedlings of the target leafy vegetable plants, using an LED artificial light source as an irradiation light source to irradiate the target leafy vegetables, the LED artificial light source comprises mixed light quality formed by red light, green light and blue light, and the light quality ratio of the red light, the green light and the blue light is (6.74-12.15):(1.04-1.46):1. The cultivation method provided by the application can balance the respiration and transpiration of the stomatal conductance of the plant leaves, is simple in process, can greatly reduce the leaf burning rate of the plants, and can effectively promote the growth of the plants and improve the biomass of the plants.
Owner:HENAN SANUO YOUNONG TECH CO LTD
A method for improving photosynthetic capacity of a plant
The application discloses a method for improving photosynthetic capacity of plants. The application finds that the expression of PMI1 protein in rice can improve the photosynthetic capacity of rice, the net photosynthetic rate, the stomatal conductance and the chlorophyll content of rice, and meanwhile, the yield of rice is not affected, by constructing PMI1 protein super-expression transgenic rice lines and PMI1 protein function loss mutant rice lines respectively and determining the net photosynthetic rate, the stomatal conductance and the like of the obtained lines under normal light conditions. Therefore, the application provides a method for improving the photosynthetic capacity of plants, that is, improving the photosynthetic capacity of plants by super-expressing PMI1 protein in plants. The application is favorable for the cultivation of plant varieties with improved photosynthetic capacity.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY
Method for evaluating cadmium transport capacity of reed based on plant functional traits
ActiveCN116256473Beasy to operateimprove accuracyFluorescence/phosphorescenceTesting plants/treesCadmium transportSoil science
This invention belongs to the field of soil remediation technology and relates to a method for assessing the cadmium translocation capacity of reeds based on plant functional traits. The method involves measuring the basal diameter, stomatal conductance, and transpiration rate of normally growing reeds. A cadmium translocation assessment index, R = (R1 + R2 + R3) / 3, is calculated based on these parameters, where R1, R2, and R3 are the transpiration rate assessment index, stomatal conductance assessment index, and basal diameter assessment index, respectively. This cadmium translocation assessment index is then used to evaluate the cadmium translocation capacity of the reeds. This method allows for the assessment of cadmium translocation capacity of reeds without cadmium treatment, simply by measuring some functional traits, thus reducing cadmium pollution and ensuring safety and environmental protection. It also helps in screening reed strains with high cadmium translocation capacity, improving the application efficiency of reeds in heavy metal pollution remediation.
Owner:SHANDONG UNIV