69 results about "Cold damage" patented technology

The invention relates to a microbial strain and application thereof, in particular to bacillus brevis, a microbial agent prepared from the bacillus brevis and application of the microbial agent. The invention provides the cold-resistant bacillus subtilis which has multiple functions of generating capsular polysaccharide, being high in salt resistance and cold resistance, promoting growth and disease resistance of plants in saline-alkali soil and the like. The bacterial strain can generate capsular polysaccharide, experiments prove that the bacterial strain has high capabilities of dissolving phosphorus, fixing nitrogen and producing siderophore, IAA, ACCD and cytokinin, and has strong antagonistic action on fusarium, curvularia and microplasmodium, and the generated capsular polysaccharide can promote salt tolerance of plants, so that the yield of the plants is increased, and the yield of the plants is increased. The bio-fertilizer is suitable for production of multifunctional bio-fertilizers with disease prevention, growth promotion, salt and alkali resistance, cold resistance and the like, is applied to production of saline-alkali soil grain crops, pasture and greenhouse commercial crops, has remarkable effects of promoting cold damage resistance, root development, prevention and control of root diseases, improvement of crop yield and the like, can reduce the use of chemical fertilizers and pesticides, and has a wide application prospect.

The invention relates to the technical field of refrigeration houses for storage, and provides a refrigeration house for fruit storage and a storage method.The refrigeration house for fruit storage comprises a refrigeration house body, a plurality of independent refrigeration house box bodies are arranged in the refrigeration house body, refrigeration equipment is installed in the refrigeration house body, and the air inlet end of the refrigeration equipment communicates with the outside through a pipeline; the output end of the refrigeration equipment communicates with a ventilation pipeline, the multiple storage racks are arranged in each refrigeration storage box, the ventilation box bodies are fixedly installed in each storage rack, each ventilation box body is provided with a ventilation structure, the air uniformizing assembly is installed at the top of each refrigeration storage box body, and the air uniformizing assembly is connected with the storage racks. By means of the technical scheme, the technical problems that in the related technology, when fruits stored in a refrigeration house are taken out, the phenomenon of local cold damage is likely to occur in the temperature returning process, temperature returning is difficult to conduct on part of fruits in batches according to the requirements, and consequently high-value fruits are difficult to supply according to the requirements in a graded mode are solved.

The invention belongs to the technical field of biological bacterial fertilizers, and discloses a Chinese herbal medicine carrier-based multifunctional microbial bacterial fertilizer, which comprises a microbial strain group, a Chinese herbal medicine active component group, an organic matter and nutrition carrier, mineral elements and auxiliary components, and a functional synergist. Through the synergistic interaction of Chinese herbal medicine active ingredients and functional microbial flora, breeding of harmful bacteria in soil is inhibited, synthesis of acetylcholin esterase of nematodes is interfered, a continuous cropping disease occurrence chain is blocked from the source, and meanwhile, organic acid and flavonoid substances slowly released by a Chinese herbal medicine carrier are utilized to activate resistance gene expression of a plant system, so that the disease resistance of the nematodes is improved. The tolerance threshold of crops to high temperature, cold damage and diseases is enhanced; in the composite carrier, humic acid and diatomite are crosslinked through hydrogen bonds to form a stable granular structure, the cation exchange capacity and porosity of soil are effectively improved, the strong hydration capacity of polyglutamic acid is combined to lock nutrients and moisture, and development of meristem of a root system and proliferation of capillary roots are promoted.

The invention relates to the technical field of agricultural product preservation, and particularly provides a storage and preservation method for relieving low-temperature cold damage after peaches are picked, which comprises the following steps: pre-cooling the picked peaches to 8-10 DEG C by using 100-1000ppm of acidic calcium sulfate composite ice water; performing cold domestication on the precooled peaches at 8-10 DEG C for 3-5 days, and then performing low-temperature storage at 0-5 DEG C. According to the storage and preservation method disclosed by the invention, 1-4 [mu] L / L of an ethylene inhibitor can be added during cold domestication and / or the low-temperature storage is in a low-voltage electrostatic field of 1-5 KV / cm. The storage and preservation method disclosed by the invention can effectively prolong the preservation period of the peaches, reduce the cold damage browning index of the pulp, maintain relatively low conductivity and MDA content, reduce the rotting rate, and maintain relatively high flavor and good commodity. The invention provides a new normal form for storage and preservation of peaches of different varieties, and has a wide application prospect.

The invention discloses a preservative sprayed before picking of peach fruits and a spraying method thereof, and is characterized in that the preservative is prepared from the following raw materials in percentage by mass: 2-8% of alginate oligosaccharide, 0.05-0.2% of gamma-aminobutyric acid, 0.5-2% of capric triglyceride, 0.1-0.3% of glycerol, 1-3% of tween-80, 0.2-1% of sodium carboxymethyl cellulose and the balance of water. The method for spraying the preservative to the peach fruits before picking the peach fruits comprises the following steps: selecting peach trees with consistent tree age and growth vigor, starting from the 90th-110th day after the peach fruits bloom, spraying the peach fruits three times every three days, uniformly spraying the surfaces of the peach fruits until the surfaces of the peach fruits are in a dripping state, and spraying the preservative to the surfaces of the peach fruits. The method has the advantages that the commodity fruit rate of the picked peach fruits is increased, the storage period of the peach fruits is prolonged, the normal-temperature storage rotting rate of the peach fruits is reduced, the cold damage caused by low-temperature storage is relieved, and the quality and taste of the fruits are kept.

The invention discloses application of a molybdenum disulfide nano material in crop cold damage regulation and control, and belongs to the technical field of anti-cold agents. The preparation method comprises the following steps: dispersing a molybdenum disulfide nano material in water to obtain a suspension; then the suspension is sprayed on corn and soybean leaves, the cold resistance of the corn and the soybean is regulated and controlled in a leaf surface spraying mode, the biomass of the cold-damaged corn and the soybean can be increased, and the application prospect is excellent.

The invention discloses a rice cultivation method capable of effectively preventing low-temperature cold damage, and relates to the technical field of agricultural planting. The method aims at solving the problems that the low-temperature-resistant potential of seeds cannot be brought into full play, plough layer conditioning measures are not meticulous enough, and personalized schemes for different soil types and low-temperature environments cannot be achieved. Through technical measures of rice germplasm treatment, cultivation soil treatment, field management and the like, the cold resistance of the rice is effectively improved, the rice can still keep a good growth condition in low-temperature cold damage weather, meanwhile, the soil quality is improved, a foundation is laid for sustainable agricultural development, and the method is worthy of popularization and application. Through low-temperature climate data analysis, early warning system establishment and emergency response mechanism matching, the stability and risk resistance of agricultural production are improved, innovation and development of a rice planting technology are promoted, the rice quality is improved, the requirement of the market for high-quality rice is met, and higher economic benefits are brought to farmers.

The invention provides an edible coating fresh-keeping liquid suitable for low-temperature refrigeration of harvested tropical fruits and a storage and fresh-keeping method. The low-temperature cold storage edible film coating fresh-keeping liquid is soybean oil. When bananas or mangoes are coated with the edible coating liquid for low-temperature refrigeration, the occurrence of fruits under low-temperature refrigeration can be effectively inhibited, and the sensory quality and shelf life of the fruits can be maintained. Bananas or mangoes are subjected to soybean oil coating treatment, so that the relative conductivity of fruit tissues can be effectively reduced, and the integrity of fruit cell membranes is maintained; according to the present invention, the production of H2O2, O2 <-> and MDA can be significantly reduced, the activity of POD can be inhibited, and the activity of PPO, SOD and CAT can be enhanced so as to activate the anti-oxidation defense system of fruits, reduce the oxidative damage caused by cold injury, and enhance the accumulation of osmotic regulation substances; the content of antioxidant carotenoid can be increased, so that the stress resistance of the fruits is improved, and the cold injury of the fruits in the low-temperature storage process is reduced.

The application of exogenous complex control measures in reducing tobacco low temperature early flowering, after tobacco transplanting, before the arrival of low temperature cold damage, exogenous complex measures solution is sprayed; the exogenous complex chemical measures solution is the mixed solution of magnesium sulfate and salicylic acid. The invention uses low temperature sensitive tobacco variety Yunyan 87 as experimental material, compares and analyzes the changes of leaf phenotype, physiology and biochemistry indexes of Yunyan 87 seedlings under low temperature stress and various exogenous material treatment, and confirms the role of the complex measures in resisting cold stress. The low temperature adversity resistance of tobacco seedling stage plants is improved by using suitable concentration magnesium sulfate to spray the tobacco seedlings, so that the growth state of the tobacco seedlings subjected to the low temperature adversity stress of the reverse spring cold tends to be normal, the frost injury and frost death phenomenon of the tobacco seedlings after the cold stress is reduced, the cold resistance of the tobacco seedling stage is improved, the early flowering in the later period is prevented, and the operation is simple, the cost is low, and the effect is obvious.

The invention belongs to the technical field of fruit tree planting, and relates to a novel fruit tree cold-resistant resistance inducer as well as a preparation method and application thereof. According to the resistance inducer, a bacillus subtilis BS-Z15 fermentation extract (abbreviated as B-MES) is used as a main component and is matched with calcium, zinc, iron, boron, trehalose, abscisic acid and the like with different concentrations to form the special resistance inducer for different fruit trees or other plants. The resistance inducer provided by the invention can significantly improve the physiological function and stress resistance of fruit trees in a cold environment, reduce low-temperature damage, and effectively solve the problem of sudden cold damage possibly encountered by the fruit trees in early spring low temperature and late spring cold and other growth stages. The cold-resistant agent has an excellent cold-resistant effect in fruit trees such as apples, walnuts and apricots and crops such as cotton seedlings, can effectively improve the cold resistance of plants, is wide in application range and has important significance on cold resistance of the crops such as the fruit trees. Meanwhile, the cold-resistant resistance inducer is simple in preparation method, convenient to use and suitable for large-scale popularization.

The application discloses a traditional Chinese medicine composition for treating common cold by simultaneously resolving exterior and interior, and belongs to the technical field of traditional Chinese medicine compound. The application provides two groups of traditional Chinese medicine compositions which are used according to syndrome differentiation: the composition for treating wind-cold common cold is based on Xiaolingtang and Wuling San, and is combined with apricot kernel, purple yam, forsythia flower and the like; the composition for treating wind-heat common cold is based on Dalingtang, Wuling San and Houpu Dahuang Tang, and is combined with apricot kernel, radix trichosanthis and the like. According to the theory of cold damage of six meridians, the application divides the source of common cold into wind-cold and wind-heat, establishes the treatment method of simultaneously resolving exterior and interior, resolves exterior pathogen, regulates triple energizer and resolves internal pathogen, regulates the human body environment, and thus treats common cold. The application has the characteristics of simple and intuitive syndrome differentiation standard, reliable prescription combination, industrialized oral preparation, treatment of wind-cold common cold and wind-heat common cold, fast effect, wide indication and convenient use.

The invention discloses a multi-source meteorological fusion paddy rice low temperature cold damage early warning method and system, and relates to the data processing related technical field, the method comprises the following steps: collecting remote sensing data and meteorological data in a paddy rice area, the meteorological data comprising meteorological temperature and meteorological humidity, and the remote sensing data comprising remote sensing characteristic data and remote sensing content data; temperature parameters and chlorophyll parameters in the rice area are recognized, and remote sensing temperature precision and remote sensing chlorophyll precision are obtained through back-stepping according to the remote sensing feature data and the meteorological data. According to remote sensing temperature precision and meteorological data, fusion processing is carried out to obtain fusion temperature, and environment low-temperature parameters are obtained by combining meteorological humidity. According to the environment low-temperature parameters, the chlorophyll parameters and the remote sensing chlorophyll precision, rice low-temperature cold damage parameters are obtained through prediction, and early warning judgment is conducted. The technical problems that in the prior art, a rice low-temperature cold damage early warning method only depends on a single data source, the early warning precision is insufficient, and rice low-temperature cold damage cannot be effectively prevented are solved.

The utility model discloses a greenhouse bottom vent opening and closing device convenient to buffer, which relates to the technical field of agricultural engineering and comprises a wall body, a greenhouse frame, a buffer mechanism and an adjusting mechanism, the shed frame is fixedly arranged at the top of the wall body, and a cross rod is fixedly arranged at the top end of the wall body A wind-resistant buffer mechanism is fixedly arranged on the inner wall of the wall body, and an adjusting mechanism used for manually adjusting opening and closing is installed at the bottom of the transverse rod. Through linkage of the clockwork spring and the wind-up roller, automatic wind-up and tension stabilization of the buffer film are achieved, wind impact is reduced, and the film body is prevented from being damaged. The fixing support and the clamp spring simplify operation, the buffer film directionally guides air to the position above crops, the risk of cold air direct irrigation is reduced, and humiture sudden change and cold damage are reduced.

The utility model discloses a fruit and vegetable storage box and refrigeration equipment, the fruit and vegetable storage box comprises a box body and a ripening device, the box body is provided with a ripening space, the temperature of the ripening space is a first temperature, and the first temperature is greater than or equal to 12 DEG C and less than or equal to 15 DEG C; the ripening device is arranged in the ripening space, and the ripening device is configured to perform ripening on fruits and vegetables in the ripening space in a physical mode. The ripening device provided by the utility model performs ripening in a physical mode, does not need the limitation of high-temperature conditions, can slow down nutrition consumption and moisture loss of fruits and vegetables by setting the temperature of the ripening space to be between 12 DEG C and 15 DEG C in a low-temperature environment, is favorable for maintaining the freshness of the fruits and vegetables, is not too low in temperature, and is convenient to use. The cold damage phenomenon of the fruits and vegetables can be avoided, so that low temperature is combined with physical ripening, the maturity of the fruits and vegetables can be improved, and meanwhile the quality of the fruits and vegetables can be guaranteed.

The invention relates to the technical field of fresh food fresh-keeping control, and discloses a fresh food fresh-keeping control system based on osmotic pressure cooperating with a low-temperature barrier, and the system comprises a category parameter locking module which is used for obtaining and fixing the category parameters of the current batch of fresh food; the first measurement conversion evaluation module is used for collecting environment temperature and humidity and calculating environment water activity and effective osmotic pressure difference; the priority path judgment module is used for determining a priority regulation and control path according to the inhibition degree gap symbol and the cold damage temperature window upper limit; the main variable correction module is used for adjusting the temperature and the humidity according to the priority path and rechecking the inhibition degree and the osmotic pressure difference; the sub-variable fine adjustment module is used for finely adjusting sub-variables according to the category parameters and rechecking the inhibition degree and the osmotic pressure difference; the inspection amplitude limiting module is used for re-checking the osmotic pressure difference and adjusting the temperature and humidity; and the disturbance switching checking module is used for returning to the first measurement conversion evaluation module during disturbance and checking batch parameters. According to the invention, accurate fresh-keeping control of fresh food in the low-temperature storage process is realized, the fresh-keeping period is prolonged, and the quality is kept stable.

The application discloses application of a peach fruit hexokinase PpHXK3 gene in preparation of a plant cold-resistant product, and is characterized in that the nucleotide sequence is shown as SEQ ID NO. 1, and the amino acid sequence is shown as SEQ ID NO. 2; a cloning method of PpHXK3 comprises the following steps: extracting total RNA of peach fruit and reversely transcribing the total RNA into cDNA as a template, and designing upper and lower amplification primers according to a gene sequence of PpHXK3; finally, a PpHXK3 gene amplification product is obtained through PCR amplification; the application of PpHXK3 in preparation of polygalacturonase PpPG21 inhibitors and / or polygalacturonase PpPG23 inhibitors, and the application of PpHXK3 in preparation of peach fruit cold-resistant products and heterologous plant cold-resistant products are also provided; and the advantages are that the decomposition of pectin is reduced, the integrity of a cell wall structure and the hardness of a fruit are maintained, the fruit has higher cold resistance, and cold damage in a storage and transportation process is reduced.

The utility model discloses a water heating and cooling device suitable for greenhouse irrigation. The heating and cooling device comprises a heat exchanger, a secondary pure water side water inlet pipeline, a secondary pure water side water outlet pipeline, a primary hot water side water inlet pipeline, a primary ice water side water inlet pipeline, a primary hot water side water outlet pipeline and a primary ice water side water outlet pipeline; the device can adapt to temperature changes in different seasons, especially in regions with high temperature in summer and autumn and low temperature in winter, the temperature of the heat exchange medium is adjusted, the irrigation water temperature is kept stable, and therefore the influence of environment changes on plant growth is reduced; the fluctuation of the temperature of irrigation water is reduced through accurate temperature control, and physiological pressure, such as heat stress or cold damage, caused by temperature mutation to plants is avoided; by controlling the temperature of the irrigation water, the problem of water evaporation or insufficient water absorption of plants caused by uncomfortable temperature can be reduced, so that the utilization rate of the irrigation water is improved.

The invention discloses application of a peach fruit hexokinase PpHXK3 gene in preparation of a plant cold-resistant product. The peach fruit hexokinase PpHXK3 gene is characterized in that a nucleotide sequence is shown as SEQ ID NO.1, and an amino acid sequence is shown as SEQ ID NO.2; the cloning method of the PpHXK3 comprises the following steps: extracting total RNA (Ribonucleic Acid) of peach fruits, reversely transcribing the total RNA into cDNA (Complementary Deoxyribonucleic Acid) as a template, designing upstream and downstream amplification primers according to a PpHXK3 gene sequence, and finally, carrying out PCR (Polymerase Chain Reaction) amplification to obtain a PpHXK3 gene amplification product. The invention further provides application of the PpHXK3 in preparation of a polygalacturonase PpPG21 inhibitor and / or a polygalacturonase PpPG23 inhibitor and application of the PpHXK3 in preparation of peach fruit cold-resistant products and heterologous plant cold-resistant products, and the PpHXK3 has the advantages that decomposition of pectin is reduced, integrity of a cell wall structure and hardness of fruits are maintained, so that the fruits have high cold resistance, and the yield of the fruits is increased. And the cold damage in the storage and transportation process is reduced.

The present application belongs to the technical field of oil production matching technology, and discloses a high-coagulation heavy oil reservoir cold damage evaluation method, which utilizes physical simulation and numerical simulation methods to analyze the reservoir cold damage degree, reversibility, the minimum temperature for avoiding cold damage and the reservoir temperature recovery time from quantitative and qualitative aspects, wherein the physical simulation firstly determines the crude oil properties through the crude oil viscosity-temperature and wax precipitation experiments, then utilizes the core to carry out breakthrough pressure experiments to determine the occurrence temperature of the reservoir cold damage, startup pressure experiments to determine the minimum temperature for avoiding damage, relative permeability experiments to determine the influence degree of the cold damage on the reservoir percolation capacity, mercury injection experiments to analyze the influence of the cold damage on the reservoir pore structure, and two-dimensional nuclear magnetic experiments and laser confocal experiments to determine whether the cold damage is reversible and the reversible temperature; the numerical simulation is utilized to analyze the recovery time required for different liquid amounts and different temperature working liquids to enter the formation, so as to finally achieve the purposes of reducing the development cost of the high-coagulation oil reservoir and improving the development effect.

The invention provides a plant cold-proof, stress-resistant and anti-freezing method for enhancing plant respiratory conduction efficiency, and relates to the technical field of plant cultivation and stress-resistant protection. According to the method, a composite anti-freezing agent containing auxin, a conduction accelerant, a stress-resistant inducer, an osmotic regulator and a nutritional supplement is prepared and sprayed to the whole plant 24-48 hours before low-temperature freezing injury occurs, the respiration and nutrient conduction efficiency of the plant are enhanced, dry matter is quickly accumulated to reduce the freezing point of cells, and a stress-resistant defense system is started. The core innovation lies in multi-component synergistic adaptation, precise spraying opportunity control and broad-spectrum crop adaptability, and the problems that a traditional method is limited in anti-freezing effect and prone to causing physiological unbalance of plants are solved. Practice verification shows that the method can improve the cold resistance of the plants by 2-5 DEG C and reduce the freezing damage loss rate by more than 60%, is suitable for various plants such as field crops, garden crops and commercial crops, is simple and convenient to operate and controllable in cost, and provides effective technical support for plant cultivation in an extremely low-temperature environment.

The invention provides a fruit and vegetable fresh-keeping refrigerator which comprises a refrigerator body, a refrigerator door and a refrigerator cover. The display panel is used for displaying confirmation information; the confirmation information comprises fruit and vegetable types of the fruits and vegetables to be preserved and fresh states of the fruits and vegetables; the temperature control module and the fruit and vegetable fresh-keeping special area are arranged in the box body; the temperature control module is connected with the refrigeration equipment; the temperature control module is configured to control the fruit and vegetable fresh-keeping special area at a set fresh-keeping temperature according to the confirmation information; obtaining the fresh-keeping temperature in the fruit and vegetable fresh-keeping special area; calculating an integral average temperature and a temperature fluctuation range in the fruit and vegetable fresh-keeping special area based on the fresh-keeping temperature; on the basis of the integral average temperature and the temperature fluctuation amplitude, a fruit and vegetable flavor result is obtained and sent to the display panel for display, so that the problems that the fresh-keeping effect of fruits and vegetables is difficult to monitor and evaluate in real time at present, and the fruits and vegetables are prone to rot or cold damage in the storage process are solved.

The invention discloses a fresh-keeping method for relieving banana cold damage through constant magnetic field treatment. The fresh-keeping method comprises the following steps: step 1, material selection and pretreatment; step 2, constant magnetic field treatment; and step 3, packaging and storing. 4, evaluating the effect; a constant magnetic field physical treatment mode is adopted, chemical agents do not need to be added, harmful substance residues on the surfaces of fruits and vegetables are avoided, and the food safety requirement is met; one-time constant magnetic field treatment is only carried out at the initial stage of storage, the continuous treatment time is not longer than 12 hours, and compared with an intermittent continuous treatment mode or a whole-process continuous treatment mode in the prior art, energy consumption is remarkably reduced; the cold injury index of bananas in the low-temperature storage period can be effectively reduced, the peel brightness is improved, cold injury symptoms are delayed, the appearance and quality of fruits are maintained, and the cold injury relieving effect is optimal when the bananas are treated by a 5mT-intensity constant magnetic field for 12 hours or treated by the 5mT-intensity constant magnetic field for 8 hours.

The invention discloses a temperature-sensitive regulation molybdenum disulfide composite nano material and application thereof in crop cold damage control, and belongs to the technical field of anti-cold agents. The preparation method comprises the following steps: mixing monomers (N-isopropylacrylamide and N-tert-butyl acrylamide), a cross-linking agent, a surfactant and a MoS2 dispersion liquid, and heating to react for a period of time; then adding an initiator, and continuously reacting for a period of time; and after the reaction is finished, cooling and dialyzing to obtain the temperature-sensitive regulation and control molybdenum disulfide composite nano material. The composite nano material is dispersed in water to prepare a suspension, and the suspension is applied to crops such as corn and soybean plants in a foliage spraying manner, so that the cold resistance of the crops is enhanced, and the biomass of the crops such as the corn and the soybean which are damaged by cold is improved. The method is simple and efficient, and has a good application prospect.

The application discloses application of a GhSPX9 gene in improving cold resistance of cotton and belongs to the technical field of plant molecular biology. The nucleotide sequence of the GhSPX9 gene is shown in SEQ ID No. 1 or a degenerate sequence for coding the same protein as the sequence shown in SEQ ID No. 1. Overexpression of the GhSPX9 gene in cotton can improve the cold resistance of the cotton. The application firstly explicitly defines the functional role of the gene GhSPX9 in the cold resistance of cotton, and provides a target gene for enhancing the cold resistance of cotton. The application finds through various tests that silencing of the GhSPX9 gene can reduce the cold resistance of the plant; overexpression of the GhSPX9 gene can enhance the cold resistance of the plant, and the result shows that the GhSPX9 plays a positive regulation role in the cold resistance of cotton. The GhSPX9 gene can be applied to preventing and treating cold damage of cotton, and can be specifically applied to genetic improvement or molecular breeding of enhancing the cold resistance of cotton, such as cultivating a cold-resistant cotton variety.

The invention belongs to the technical field of food fresh-keeping bags, and particularly relates to and discloses a food fresh-keeping bag as well as a preparation process and application thereof. The fresh-keeping bag comprises fresh-keeping including self-hydrogen-production composite particle fresh-keeping, and the fresh-keeping bag structurally comprises a hydrogen release layer and a contact layer; the method comprises the following steps: putting pretreated chilled fresh meat which is not packaged by a film and a pre-packaged fresh-keeping bag into an aluminum film packaging bag, vacuumizing, filling a small amount of hydrogen, sealing, refrigerating, storing and transporting. During storage, water is evaporated on the surface of the food, and water molecules are released to trigger the self-hydrogen-production composite particles to continuously release hydrogen, so that the freezing and fresh-keeping effects on the chilled meat are realized. According to the invention, the self-hydrogen-producing composite particles are used as a continuous hydrogen supply source and are well cooperated with the charged hydrogen, so that the system has high gas balance self-adjusting ability, and the dynamic stable hydrogen concentration in the package continuously promotes heat conduction, enhances oxidation resistance, reduces cold damage and reduces decay speed, and maintains the freshness steady state of chilled meat for a long time. The preservation method can be widely applied to various chilled fresh meat foods.

The invention discloses a corn low-temperature cold damage vulnerability assessment method. The method comprises the following steps: 1, selecting indexes; step 2, constructing a cold damage index; step 3, identifying a cold injury event; 4, simulating the growth condition; 5, establishing a fragile curved surface; in the fourth step, the key physiological index loss rate is obtained by subtracting the key physiological index under the cold injury condition from the key physiological index, dividing the key physiological index under the normal condition and multiplying by 100%; according to the method, from the perspective of a soil-crop-atmosphere continuum, indexes capable of representing the low-temperature cold damage on different scales are selected, the comprehensive cold damage index is formed after weighting, the actual low-temperature cold damage condition of corn can be more accurately represented, a complete cold damage event is identified according to a run-length theory, and the method has the advantages of being high in accuracy and high in accuracy. The three-dimensional vulnerability curved surface is formed in combination with the cold damage duration, crop disaster conditions corresponding to different cold damage degrees can be represented, and cold damage events can be described more visually and comprehensively.

The invention relates to a method for early predicting ethylene stimulation tolerance of a rubber tree variety, and belongs to the technical field of rubber tree rubber collection. The method comprises the following steps: on the basis of an established regression equation of the rubber tree bursting and gummosis rate after ethylene stimulation and the average cold injury level, establishing a rubber tree multi-variety cold-resistant sentinel nursery, counting the cold injury level of each rubber tree variety after winter, and substituting the cold injury level into the regression equation to calculate the bursting and gummosis rate of the rubber tree. The higher the cracking and gummosis rate is, the more stimuli-resistant is, so that the early quantitative identification of the ethylene stimuli tolerance of the to-be-selected rubber tree variety is realized. The method is suitable for early prediction of ethylene stimulation tolerance of various rubber tree varieties, can greatly save breeding time, manpower and material cost, and is easy to popularize and apply.

The invention provides a control method of a refrigerator with an anti-cold damage function and the refrigerator, an anti-cold damage variable temperature area is arranged in the refrigerator for placing fruits and vegetables, under the condition that a door body of the refrigerator is not operated, the first fruit and vegetable type of the fruits and vegetables stored in the anti-cold damage variable temperature area is determined, and the first fruit and vegetable type of the fruits and vegetables stored in the anti-cold damage variable temperature area is determined in response to a door opening and closing operation signal for the refrigerator. And determining a second fruit and vegetable type in the anti-cold-damage variable-temperature area, determining a temperature control strategy of the anti-cold-damage variable-temperature area according to the second fruit and vegetable type when determining that the first fruit and vegetable type is different from the second fruit and vegetable type, and adjusting the temperature of the anti-cold-damage variable-temperature area based on the temperature control strategy. According to the refrigerator, by means of the control method, whether new fruit and vegetable varieties are put in or not is intelligently recognized, when it is recognized that the new fruit and vegetable varieties are put in, a new temperature control strategy is automatically determined, the optimal storage temperature is automatically set, cold damage can be effectively prevented, fresh keeping and cold damage prevention can be taken into consideration, and the refrigerator is high in practicability. And the intelligent level of the refrigerator is improved.

The present invention belongs to the technical field of rapeseed planting, and discloses a method for identifying and evaluating the cold tolerance of Brassica napus during the flowering period, which comprises the following steps: First, when Brassica napus is in the flowering period, it is subjected to sub-zero low-temperature stress treatment, and after the treatment is completed, the plants are moved back to the greenhouse to resume growth; Then, 5 days after the plants resume growth, the cold damage phenotypic symptoms of the upper stem leaves, flower buds, petals, main inflorescence, branched inflorescence, fruit stalks, young siliques, and long siliques of the plants are collected, and the corresponding phenotypic symptoms are scored; Finally, the low-temperature tolerance level of the plant is determined according to the total score. Starting from the changes in the phenotypic symptoms of Brassica napus plants under low-temperature stress, the present invention visually observes the phenotypic traits of Brassica napus, and constructs an evaluation system for Brassica napus under low-temperature stress during the flowering period; The operating conditions are easy to meet, easy to operate, convenient and fast. Through field production tests, the results are accurate and reliable, and can provide germplasm reference for the breeding of rapeseed varieties with cold tolerance during the flowering period.

The utility model discloses a ventilation structure for facility agriculture glass greenhouse, include: edge frame, top frame, first ventilation group, second ventilation group and third ventilation group, top frame installs at the top of edge frame, first ventilation group and second ventilation group all install below top frame, wherein, first ventilation group is horizontal ventilation structure, and second ventilation group is vertical ventilation structure, third ventilation group installs at the side of edge frame. First ventilation group horizontal air supply covers greenhouse middle part horizontal area, and second ventilation group vertical air supply drives up and down layer air exchange, and third ventilation group lateral air supply strengthens edge area ventilation, and the three cooperation makes greenhouse airflow evenness get promotion, thoroughly solves traditional ventilation middle part sultriness, edge cold damage problem, guarantees air temperature, humidity, carbon dioxide concentration whole area balance, reduces the incidence of disease and insect pests.