107 results about "Moisture stress" patented technology

The invention discloses an irrigation control method and system based on crop root zone soil moisture and root distribution. The method comprises the steps that parameters are set, soil water content in each soil layer of a root zone is monitored, root zone weighted average soil water content is computed according to relative root length density distribution, a crop water stress index (CWSI) is computed, when the CWSI computed value is larger than a preset CWSI critical value, irrigation is started; theoretical irrigation amount can also be computed according to planned moisture layer soil water content, and when practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system, the water stress degree of crops can be accurately and conveniently estimated, the fact that the root zone soil moisture distribution conditions and the crop moisture conditions are considered during irrigation is controlled according to the water stress degree, and an effective tool is provided for realizing of the purposes of water saving and production increasing.

The invention discloses an irrigation control method and system for saline-alkali soil. The irrigation control method includes the following steps that parameters are set, soil water content of all soil layers of a root zone is monitored, root zone weighting average soil water content and root zone weighting average soil water percolation are calculated based on relative root length density distribution, and CWSI is calculated; when a CWSI calculation value is larger than a preset CWSI critical value, irrigation is started; the theoretical irrigation amount is calculated according to soil water content distribution in a planned moisture layer. When the practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system for saline-alkali soil, influences on transpiration and growth of crops by soil water content, salinity and root distribution are comprehensively considered, the water stress degree of the crops on the saline-alkali soil are estimated more accurately and more conveniently and an effective tool is provided for achieving the purposes of saving agricultural water and boosting the yield of the saline-alkali soil.

The invention discloses a remote sensing quantitative inversion method for soil moisture supply amount. The method comprises the integration of dynamic simulation of crop growth, remote sensing quantitative inversion, soil moisture balance and kinetic equation so as to obtain the soil moisture supply amount from a certain time interval to the entire growth period of a crop growth period. The characteristics of dynamic simulation technology and remote sensing quantitative inversion technology for crop moisture stress information are integrated, so that real-time and dynamic monitoring of the soil moisture supply amount in the crop growth period is realized. The largest advantage of the method is that the monitoring of the soil moisture supply amount is dynamic in the aspect of time and continuous in the aspect of space.

The present invention discloses a crop irrigation water requirement calculation method on future climatic conditions. The method comprises the steps of collecting the future climatic mode data, and correcting the future climatic mode data based on the historical actually measured meteorological data to enable the future climatic mode data to be suitable for the climatic change influence evaluation of a region or station scale; according to the growth period data of a crop field test and an accumulated temperature formula, constructing a response model of the crop planting date and the crop growth period length to the temperature; utilizing a penman formula to combine a single crop coefficient method and a soil moisture stress coefficient to calculate the crop daily water requirement; based on a crop irrigation system and a water balance principle to calculate the crop daily irrigation water requirement. Aiming at the influence of the climatic change on the agricultural water resource security, the method of the present invention considers the change of the crop planting date and the growth period caused by the global warming, so that a water resource planning management department can forecast the regional future agricultural water resource utilization amount more accurately, and accordingly, a water resource planning scheme is proposed more reasonably.

A method includes measuring an occurrence frequency of elastic waves generated by cavitations in vascular tissues in vascular plant, before and after a change in water stress to the vascular plant, respectively by an elastic wave reception sensor fixed to an axis of the vascular plant, calculating a change rate of the occurrence frequency, from the occurrence frequency of the elastic wave measured before and after the change, respectively, and determining whether or not an embolism in the vascular tissue arrives at an unrecoverable level of the embolism, from the calculated change rate. And then, one can determine irrigation timing and quantity to the vascular plant, using an index based upon the above-determined result.

The invention relates to a method for enhancing the drought resistance of festuca arundinacea by adopting domesticated plant seeds. The process of domesticating the festuca arundinacea by a domestic garbage compost substrate comprises the following steps that: the domestic garbage compost substrate is flatly spread on a sample plot, then the compost becomes compact and flat by press, and the average thickness of the compost substrate is 20cm; the sowing mode is spring sowing, water in the compost substrate, which is used for domesticating the festuca arundinacea in each year, only depends on natural precipitation, and the seeds of the festuca arundinacea are harvested after 4 domestication years; then, the seeds of the domesticated festuca arundinacea are sown in a soil substrate according to 130 / m2 in spring, the temperature is controlled at 20 to 26 DEG C, the relative humidity is 30 to 50 percent, the seeds are fully watered at the initial stage of sowing, and the conditions that the seeds can successfully germinate and seedlings grow at the initial stage are ensured; water is quantitatively supplied according to the stress degree of the water content after two weeks, 55 to 65 percent of the field moisture capacity is reached, and the experimental period is 38d; and the festuca arundinacea and the substrate are mown after being cultured for 38d, the festuca arundinacea is cleanly rinsed by using distilled water, and the index of the drought resistance of the domesticated festuca arundinacea is measured.

The invention provides a crops water forcing index determining device and method. The determining device includes: data collecting and processing units, composed of a data collecting probe and of data collector and calculating unit, respectively and connected with each other; the data collecting probe includes infrared temperature measuring probe, ventilated psychrometer, solar net radiation meter, and wind velocity indicator. It also includes application of determining method in determining crops water forcing index. The monitoring station can be set in any position in the farm, enhancing working efficiency, making it unnecessary bury the system underground, providing convenient condition for agricultural mechanical labor. The system applies CWSI theoretical mode to diagnose water forcing and form an irrigating policy, enhancing diagnosis precision, able to largely reduce the waste in water resource and enhancing the utilization ratio of irrigating water resource.

A computer-implemented method of predicting yields and recommending seeding rates for subfields with informed risks is disclosed. The method comprises receiving, by a processor, weather data for a first period consisting of a plurality of sub-periods for one or more subfields of a field; for each of the plurality of sub-periods for the one subfield: calculating a moisture stress indicator from the weather data; predicting, for each of a list of seeding rates, a yield from the moisture stress indicator using a trained model; and selecting one of the list of seeding rates based on the list of predicted yields; identifying one of the predicted yields corresponding to the selected seeding rate; determining, by the processor, a risk profile associated with a range of yields for the one subfield based on the predicted yields identified for the plurality of sub-periods; transmitting data related to the risk profile to a device associated with the one subfield.

The invention discloses an estimation method of a transpiration water consumption of a greenhouse crop. The estimation method is characterized by being conducted according to following steps: (1) a calculation of a physiological factor of the crop lies in calculating an effective accumulative temperature, which is calculated and obtained by utilizing an experience function relation between the physiological factor of the crop and the effective growth accumulative temperature, of a crop growth in the greenhouse; or in measuring a leaf area which is obtained by utilizing a relation expression between the physiological factor and the leaf area. (2) A calculation of an evaporation force in the greenhouse environment is to calculate and obtain an evaporation amount of a greenhouse reference crop according to a revised Penman formula; or to calculate and obtain according to the relation expression between the evaporation amount of the reference crop and the evaporation amount of an evaporation dish. (3) A calculation of a moisture stress factor lies in that a relatively effective moisture content of a soil is actually calculated, and the relatively effective moisture content is compared with a critical moisture content, and then the moisture stress factor is obtained by putting relatively effective moisture content and the critical moisture content into the corresponding experience formula. (4) The transpiration water consumption of the crop is obtained by multiplying the physiological factor of the crop, the water consumption of the reference crop and the moisture stress factor of the soil which are actually calculated.

The invention provides a method for increasing the fragrance of black tea through abiotic stress. According to the method, tea leaves are under the condition of abiotic stress, hydrolysis of glucosidetype substances is furthest promoted, and further more floral type flavor components are formed, so that the black tea containing more floral type flavor components is made. The method has the advantages that high-glucoside-content tea tree fresh leaves are used as raw materials, through processing technologies of water stress conditions, damage stress and the like, abiotic stress conditions of water content, damage degree, oxidation degree and the like, of tea leaf processing links are accurately controlled, and the glucoside type substances are furthest degraded, so that more flower flavorsubstances are generated, and the made product has natural flower and fruit flavor characteristics. According to the method disclosed by the invention, additives of essence, spice and the like are notadded, and the consumption trend of safe and healthy black tea can be met.

The invention belongs to the field of agricultural remote sensing, and relates to a regional crop maturing stage prediction method based on accumulated temperature, radiation and soil water content. The specific steps of the method include: S1, synthesizing MODIS NDVI data of a to-be-predicted crop at a whole growing stage according to a time sequence, and extracting a planting region by employinga random forest algorithm; S2, constructing an accumulated temperature and radiation model from a heading stage to a maturing stage in a full irrigation condition; S3, constructing a Thiessen polygonby regarding agricultural weather stations as nodes; S4, calibrating a SWAP model of the to-be-predicted crop of a research region; S5, establishing a maturing stage correction factor lookup table ofthe soil water content at the whole growing stage and a maturing date of the to-be-predicted crop in a water stress condition; and S6, dynamically adjusting maturing stage model results of accumulated temperature and radiation grid unit by grid unit, and obtaining an optimal maturing stage prediction result of the to-be-predicted crop. According to the method, advantages of a statistical model and a mechanism model are combined, the maturing stage of the crop can be predicted in a large-region scale, and the prediction precision of the maturing stage of the crop is improved.

The invention belongs to the technical field of breeding of paeonia suffruticosa Andr and particularly relates to a breeding method for improving drought resistance of paeonia suffruticosa Andr. The method comprises the following steps: selecting a paeonia suffruticosa Andr variety with excellent characters as a female parent, selecting a paeonia suffruticosa Andr variety with stable yield as a male parent, hybridizing and harvesting hybrid first-generation seeds F1; planting the F1 and carrying out mixed harvesting to obtain hybrid second-generation seeds F2; back crossing F2 single plant with female parent to obtain backcross first-generation seeds BC1; back crossing the BC1 single plant with the female parent to obtain backcross second-generation seeds BC2; finally, planting the backcross second-generation seeds BC2, selfing for 3 to 4 generations and selecting the best strains as novel varieties of the paeonia suffruticosa Andr. During the treatment, water stress treatment is carried out by using a stress agent, and the germination of drought intolerant seeds can be stifled in the cradle, so that false positive drought-resistant seeds are reduced, the total sample quantity of subsequent hybridization steps is reduced, the workload is reduced and the breeding efficiency is improved.

A system and method for efficiently delivering an aqueous solution to plants includes a hydrophilic solution-channeling device having a delivery portion positionable adjacent a root system of a plant. The solution-channeling device has a lumen therethrough for channeling a solution from an inlet to the delivery portion. At least a portion of the delivery portion has a porosity adapted for permitting a flow of the solution therethrough when acted upon by at least one of a surfactant root exudate and negative root pressure generated by the plant roots, for example, when experiencing water stress and / or a need for nutrients. The system also includes a pressure regulating device for providing at least a minimum pressure value to permit fluid to flow through the lumen and at most a maximum pressure value above which fluid flows through the lumen even in the absence of surfactant root exudate or negative root pressure.

The invention provides a peanut culturing device. The peanut culturing device is provided with a hollow water-proof main body; the main body comprises a first main body and a second main body which are symmetric to each other along a central axis of the main body; a gap filled with glass cement is formed between the first main body and the second main body; a sealing film is arranged at one end of the main body; and the exterior of the sealing film is bound by using a fixing rope so as to seal the end part of the main body. The invention further provides a peanut culturing system; the system is provided with a culturing pool with an awning above; and the peanut culturing device is placed in the culturing pool. The invention further provides a method for authenticating root morphological characteristics of drought resistant peanut varieties on the basis of the peanut culturing device. According to the invention, quantitative indexes, which are changed with development progress under slight water stress, of roots of the different drought resistant peanut varieties can be accurately detected; the root morphological characteristics of the drought resistant peanut varieties are authenticated through comparing the root morphological characteristics of the different drought resistant peanut varieties; moreover, the whole peanut culturing device and system are simply structured, the detecting method is simple and convenient in operation, and accurate and reliable results are obtained.

The invention relates to the technical field of agricultural environment measurement, in particular to a greenhouse plant leaf air saturation vapor pressure deficit measuring device and measuring method. The greenhouse plant leaf air saturation vapor pressure deficit measuring device comprises a leaf blade upper surface measuring unit and a leaf blade lower surface measuring unit which are in vertical arrangement through a suction component or a clamping component, wherein the temperature of the leaf blade upper and lower surfaces is measured through a contact type temperature sensor and of the leaf blade upper surface measuring unit and a second temperature sensor of the leaf blade lower surface measuring unit, the temperature of leaf blades is synthetically reflected, the accuracy is high, meanwhile, the temperature and the humidity of air near the leaf blades are accurately measured through an air temperature and humidity sensor, the leaf air saturation vapor pressure deficit is accurately obtained through the calculation of a first microprocessor, the measuring precision is high, and reliable data support is provided for greenhouse environment regulation and control, disease prevention and water stress.

The invention discloses a method for optimizing the seedling emergence and growth condition at early stage of root tuber and tuber propagating materials. Water stress is carried out to parted seed pieces by using a method of natural dehydrations and then grown according to a conventional method. Ideal technical effect can be achieved if the proportion of moisture loss is controlled within the scope of 14.82 percent to 46.44 percent. The method of the invention solves the bias of the prior art, has dual-directional regulation effect, and is capable of promoting the germination rate of the seed pieces which still do not sprout and have short sprouts without producing much influence on seed pieces which have long sprouts, thereby obviously improving the uniformity and growth condition in later stages of emergent seedlings. The method has simple operation and has the advantages of being simple, economical and practical, and requires no extra economic investment.

The present invention relates to three novel genes of SEQ ID Nos. 1-3 useful for water-stress tolerance in biological systems, wherein said genes are differentially expressed in Tea plant under drought conditions and a method of introducing said genes into a biological system to help develop water stress tolerance.

A clone plant drought resistance evaluation method based on the physiological integration capacity is characterized in that one plant division used as a treating plant in connected clone plant divisions is cultured in polyethylene glycol PEG-6000 solution with the weight bulk ratio being 10-30 percent to perform simulated moisture intimidation, and the other plant division used as a contrast plant is cultured in solution containing acid fuchsin, thus, by observing the transportation speed of the solution containing acid fuchsin towards the intimidated plant division direction, people can rapidly evaluate the drought resistance of the clone plate through comparing the moisture physiological integration capacity.

The invention provides a crop biomass remote sensing estimation method considering water stress. The method comprises the steps of S1: obtaining optical remote sensing data with a near-infrared waveband and a shortwave infrared waveband in a target region; S2: performing atmospheric correction processing on the obtained optical remote sensing data to obtain real surface reflectivity data of the target region; S3: extracting a planting space distribution region of crop; S4: determining a normalized vegetation index and a time integral value of the crop; S5: obtaining a water stress coefficient of the crop; S6: obtaining a biomass conversion coefficient of the crop; and S7: building a biomass estimation model of the crop. The method is in favor of estimating the biomasses of the crop in different growth periods more accurately in regional scale, and has important application values in the aspects of further realizing crop growth trend monitoring, yield estimation, drought monitoring, drought loss assessment and the like.

The present invention relates to three novel genes of SEQ ID Nos. 1-3 useful for water-stress tolerance in biological systems, wherein said genes are differentially expressed in Tea plant under drought conditions and a method of introducing said genes into a biological system to help develop water stress tolerance.

The invention discloses a method for evaluating drought resistance of crop seeds during a crop seed germination period based on stimulated luminescence. The method comprises the following steps of performing water stress on germinating crop seeds for a few days by a hypertonic solution with a certain concentration by adopting a hypertonic solution method, stimulating the germinating seeds by non-saturated light, instantly measuring light emitted after the germinating seeds are stimulated, and analyzing the stimulated luminescence of the germinating seeds under the water stress to evaluate the drought resistance of the germinating seeds during the seed germination period. According to the method for evaluating the drought resistance of the crop seeds during the crop seed germination period based on the stimulated luminescence, a stimulated luminescence decay curve of the germinating seeds is directly measured by performing the water stress on the germinating seeds only without a field experiment, and the drought resistance of the germinating seeds is nondestructively and quickly evaluated by extracting and analyzing luminous parameters; and the method is simple and practical, and has a reliable evaluation effect.

The invention relates to screening of peanut varieties, and in particular relates to a method for efficiently screening drought resistance type peanuts. The method comprises the following steps: 1) plowing and fertilizing soil in a rainproof cultivation pool; 2) selecting a to-be-tested peanut variety or strain with full grain and uniform size, and sowing the to-be-tested peanut variety or strain in the cultivation pool of the step 1), observing and recording the emergence condition and the growth condition every day; 3) performing drought stress treatment, setting the water content of the contrast treated soil as 75%-80% of the field capacity and setting the water content of the drought stress treated soil as 60%-65% of the field capacity; 4) harvesting the plants after the stress is ended, and determining the relative water content and the phenol content of the leaves; 5) screening the peanut variety or strain with the relative water content of the leaves which is reduced by less than 30% and the phenol content in the leaves which is increased by more than 25% compared with the contrast leaves. According to the invention, the change characteristics of the phenol content in different drought-resistant type peanut leaves under the water stress can be accurately measured, so that the drought-resistant type peanut variety can be identified, the measuring method is simple and convenient to operate and accurate and reliable in result.

The invention discloses a method and system for diagnosing plant water stress based on high-flux stomatal conductance, and belongs to the technical field of agricultural irrigation. A plant water stress diagnosis system consisting of high-flux stem flow, meteorological data, net radiation measurement equipment and plant height leaf area parameter auxiliary measurement is combined with a P-M formula to continuously output high-flux stomatal conductance, so that a water stress index is calculated by utilizing the stomatal conductance; and the long-time, accurate, high-pass and continuous monitoring, quantification and diagnosis of plant water stress are realized; a reference plant growing under the condition of no water stress is placed in the same growth climate environment as a plant to be detected, and according to the characteristic that the stomatal conductance of the plant is very sensitive to the water stress, the invention provides an index for diagnosing the water stress of the plant. The index can be obtained by calculating the stem flow, net radiation and meteorological data of the to-be-measured plant and the reference plant which are automatically measured in a high-flux manner, so that the high-flux quantification and diagnosis of the water stress degree of the to-be-measured plant are realized. The method comprehensively considers plant physiological response and environmental influence, and has the characteristics of physiological basis, reliable data, long-time accuracy and high-pass continuity in the application of diagnosing plant water stress.

Disclosed is a method for evaluating the wheat seed drought resisting property during germination period by utilizing the method of hypertonic solution which comprises, conducting moisture forcing treatment to the wheat seeds using polyethylene glycol 6000 (PEG-6000), charging the seeds into germination dish, storing in cultivation case, culturing to eighth day and surveying number of germination seeds, taking culture by deionized water for comparison, calculating seed germination percentage and relative germination percentage respectively.

The invention discloses a method for employing lawn nursery strip to adjust Festuca arundinacea water-stress protective enzyme. Waste newspaper and waste cotton cloths are used as a lower layer of a lawn nursery strip planting carrier; waste gauzes and waste face tissues are used as an upper layer of the lawn nursery strip planting carrier; a potting method is adopted for adding dried original soil in a container; then the lawn nursery strip is paved on the original soil flatly; and water required for seed germination is guaranteed after sowing until the seeds are germinated; then stress is started after the germination occurs for 5d and the water content in the soil is maintained at 35-50 percent of saturated water-holding capacity; after the germination occurs for 40d, various physiological and biochemical indexes of Festuca arundinacea seedlings are measured and the overground parts of the seedlings are cut; then the Festuca arundinacea seedlings are continuously cultured for 40d and then eddish and the underground parts are harvested; the total cultivation period lasts for 80d; the average indoor temperature is 18-22 DEG C; and the average humidity is 30-40 percent. Test result shows that: the lawn nursery strips of wastes can play a better role of regulating the growth of lawn grasses during the water-stress period of the plants.

The invention provides a preparation and use method of a nutrient substrate additive suitable for greening side road slopes, bare mountain bodies (quarries and mining areas) and urban green land, in particular to a functional liquid material which is prepared by evaporating and concentrating waste liquid discharged by monosodium glutamate factories and adding a chelating agent and sulphate (or oxide) for a chelation reaction and has the functions of supplying and preserving fertilizer and improving soil. The material as the nutrient substrate additive not only can find a new path for the resource utilization of monosodium glutamate waste liquid, but also can provide a new solution scheme for environment greening, in particular to the problems of vegetation degeneration, and the like, which are prone to occur because soil fertility is hard to endure and balance during the greening under the adverse conditions of soil depletion, nutrient stress, moisture stress, and the like, thereby having wide application prospect.

The invention provides a crop plant water stress phenotype detection method based on image processing. The method comprises steps: S1, the crop image is segmented into a plant pattern and a background pattern; S2, the plant pattern is segmented to obtain a stem pattern and a leaf pattern; S3, the stem pattern is thinned to be a stem straight line, the leaf pattern is thinned to be a leaf curve, the value of an included angle SOP1 formed by the straight line OS and the straight line OP1 is calculated and the value of an included angle SOP2 formed by the straight line OS and the straight line OP2 is calculated; and S4, the ratio of the value of the included angle SOP1 to the value of the included angle SOP2 is calculated, and based on the ratio, changes of the leaf of the crop in the case of water stress are estimated. According to the crop plant water stress phenotype detection method based on image processing, tiny changes of the crop can be precisely sensed and monitored, and the interaction relationship between the crop and the environment can be precisely reflected.

The invention discloses an irrigation device based on root region soil moisture stress response. The device comprises a water supply tank, a transit water tank and a root irrigation pipe, wherein thewater supply tank, the transit water tank and the root irrigation pipe are sequentially connected into a loop through a pipeline, and the transit water tank is also connected with a Markov bottle; electromagnetic valves are arranged among the water supply tank, the transit water tank and the root irrigation pipe separately and electrically connected with a controller. The controller is also connected with a plurality of sensors which are arranged around the root irrigation pipe. In addition, the invention also discloses an irrigation method of the device. The device is applied to various agricultural production conditions in arid areas and cooperatively used in a stage-by-stage water supply mode, so that the relative stability of the soil water content in root areas is ensured, most agricultural irrigation water is saved, the loss and waste of water resources are prevented, the consumption of electric power and other energy is reduced, and the input cost of agricultural production is reduced.

The embodiment of the invention provides a moisture stress state monitoring method, a device and electronic equipment; the method comprises the following steps: obtaining satellite remote sensing dataand actual measurement data of a target area, and obtaining earth surface characteristic parameters and a moisture stress factor according to the satellite remote sensing data; obtaining evapotranspiration data according to the earth surface characteristic parameters and the moisture stress factor; calculating the evapotranspiration data so as to obtain the moisture stress index; building moisture stress grade rating standards based on the moisture stress index according to drought severity rating standards of a preset drought index; obtaining an actual measurement drought index according tothe actual measurement data, and obtaining the actual measurement moisture stress grade according to the actual measurement drought index; determining whether the actual measurement moisture stress grade is consistent with the built moisture stress grade or not; if not, correcting the built moisture stress grade rating standards. The monitoring method can obtain the moisture stress grade through the actual measurement data, thus verifying the built moisture stress grade rating standards, and improving the moisture stress state identification accuracy.

A method of estimating a water property value for plants using aerial thermal images is provided. The thermal image values and at least one weather parameter are used to calculate a water stress value. The water property value is estimated using the water stress value and a predetermined correlation between the water stress value and the water property value.