45 results about "Cold damage" patented technology

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 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 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 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 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.

The invention discloses a rape cold-resistant gene BnaMYBL17 and application thereof, and belongs to the technical field of biology. The invention provides an application of a knockout BnaMYBL17 gene in improving the cold resistance of oilseed rape or cultivating oilseed rape with high cold resistance. According to the invention, a new gene BnaMYBL17 related to cold resistance is cloned from rape for the first time, and after the gene BnaMYBL17 provided by the invention is subjected to site-directed editing in the rape, a cold resistance identification result shows that the survival rate of a brassica napus strain with a knockout mutant of the gene BnaMYBL17 is remarkably higher than that of a wild type under cold injury treatment. The acquisition of the Bnamybl17 mutation system provides precious gene resources for the cultivation of cold-resistant varieties, and has important significance for analyzing the cold-resistant molecular mechanism of plants.

The invention discloses a GIS (Geographic Information System)-based rice low-temperature cold damage risk zoning method, which comprises the following steps: S1, acquiring basic data of a target rice planting area, the basic data comprising meteorological related data, farmland geographical environment related data and rice growth cycle related data; and S2, preprocessing the basic data, and constructing a standardized data set adapted to GIS spatial analysis through data cleaning, standardized processing and spatial matching operations. The invention relates to the technical field of agricultural meteorological disaster prevention and control. According to the rice low-temperature cold damage risk zoning method based on the GIS, by integrating meteorological data, farmland geographical environment data and rice growth cycle data and constructing a multi-dimensional disaster risk index, the occurrence risk of rice low-temperature cold damage can be accurately evaluated, a prediction result is dynamically corrected, and scientific and comprehensive risk evaluation is provided.

The application discloses application of molybdenum disulfide nanomaterial in crop cold damage regulation and belongs to the technical field of cold resistance agents. The molybdenum disulfide nanomaterial is dispersed in water to obtain a suspension; and then the suspension is sprayed on corn and soybean leaves, and the cold resistance of the corn and the soybean is regulated through the leaf surface spraying mode, so that the biomass of the cold-damaged corn and the cold-damaged soybean is increased, and the application prospect is excellent.

The invention provides a remote sensing assessment method for low-temperature cold injury crop damage based on vegetation index time sequence abnormity, and belongs to the technical field of agriculture, and the method comprises the steps: obtaining air temperature data and normalized vegetation indexes of a target crop planting region for many years in the past; according to the air temperature data and the normalized vegetation index, determining the damage of the target cold damage in the target year to the target crop; wherein the target year is the year where the target cold damage occurs in past years, and the damage is used for quantifying the influence degree of the target cold damage on the target crop. According to the method, remote sensing data is used for supporting, and the damage of the cold damage to the crops can be efficiently and accurately quantified in a large-range area.

The invention relates to the technical field of plant cultivation, and particularly discloses a plant cold-resistant composition and a preparation method thereof.The plant cold-resistant composition is prepared from, by weight, 15-35 parts of willow bark natural extract, 5-10 parts of silicon source, 5-10 parts of molybdenum source, 5-10 parts of selenium source and 5-10 parts of water. The dosage of the silicon source is 1-5 parts by weight of SiO2, the dosage of the molybdenum source is 0.01-0.05 part by weight of Mo, the dosage of the selenium source is 0.01-0.05 part by weight of Se, and the balance is water. According to different types of crops, low-temperature cold damage can be effectively prevented, flexible blending can be performed according to element demand characteristics of different crops, and targeted cold resistance protection is achieved.

The invention discloses a GIS (Geographic Information System)-based rice low-temperature cold injury risk assessment method and system. The method comprises the following steps of 1, constructing rice physiological behavior time sequence data; 2, constructing a day and night behavior phase model; 3, mapping the rice physiological behavior time sequence data to a day and night behavior phase model, setting a biological clock drift judgment condition, and generating a biological clock drift signal when the condition is met; 4, constructing a fusion feature vector sequence; 5, inputting the fusion feature vector sequence into an improved TimesNet model, embedding a double-time-domain gating residual filtering mechanism, and outputting a rhythm anomaly feature vector; step 6, constructing a cold damage feature vector; and 7, analyzing the recovery conditions of the photosynthetic efficiency and the chlorophyll fluorescence, and outputting a cold damage risk grade layer. According to the method, the day and night behavior phase model and the improved TimesNet model are fused, and intelligent risk grading of rice cold damage is achieved.

The present application relates to a kind of irrigation farmland crop low temperature cold injury monitoring and diagnosis method, device, equipment and medium, comprising: collecting irrigation farmland multi-source data;Key indicators are calculated based on farmland multi-source data, wherein, key indicators include: land surface temperature LST, enhanced vegetation index EVI, sunlight-induced chlorophyll fluorescence SIF and solar declination delta;The key indicators calculated are calculated by the air temperature estimation model of pre-constructed irrigation farmland to obtain farmland daily average air temperature, and based on the low temperature cold injury determination standard of farmland crop, the monitoring and diagnosis of farmland crop low temperature cold injury are carried out.The present application can be based on the actual situation of irrigation farmland crop growth, utilize multi-source remote sensing data, consider the influence of surface temperature, crop growth, canopy physiology, solar radiation and other multi-factor, accurately estimate the air temperature of irrigation farmland, have strong operability, practicality is strong, it is easy to promote.

The invention discloses a self-heat-generation fracturing fluid and a preparation method and application thereof.The self-heat-generation fracturing fluid comprises a base fluid, a cross-linking agent and an instant heating agent, the instant heating agent comprises alkali and hydrochloric acid, the base fluid comprises a thickening agent, a sterilizing agent, a cleanup additive, a clay stabilizer, a conditioning agent and the balance water, and the thickening agent adopts guanidine gum; comprising 0.2%-0.5% of a thickening agent, 0.1%-0.15% of a sterilizing agent, 0.5%-0.55% of a cleanup additive, 0.5%-0.55% of a clay stabilizer, 0.3%-0.35% of a conditioning agent, 0.4%-0.6% of a cross-linking agent, 5%-10% of alkali, 4.6%-9.1% of hydrochloric acid and the balance of water. Compared with a traditional sodium nitrite / ammonium chloride system, an acid-base neutralization system instant heating agent is adopted, the heat generation speed is higher, the heat generation efficiency is improved, and the production cost is reduced; the peak temperature is high, no side reaction gas is generated, and the risk of cold damage of fracturing fluid to a reservoir can be effectively reduced; meanwhile, guanidine gum is selected as a thickening agent, so that the sand carrying effect is better.

The invention discloses a fertilization method of a cold-resistant water-soluble fertilizer. The method comprises the following steps: applying a bio-organic fertilizer and a 15-15-15 ternary compound fertilizer as base fertilizers in a planting period; in the initial rosette stage, a water-soluble fertilizer A is applied through drip irrigation, and the water-soluble fertilizer A is composed of a liquid nitrogen fertilizer and cold-resistant functional carbohydrates; a water-soluble fertilizer B is applied through drip irrigation in the later stage of the rosette stage, and the water-soluble fertilizer B is composed of 18-8-30 + TE high-potassium water-soluble fertilizer and cold-resistant functional carbohydrates; and applying a 18-8-30 + TE high-potassium water-soluble fertilizer through drip irrigation at the initial stage of the heading stage. According to the method, through water and fertilizer integrated precise fertilization, cold-resistant carbohydrates are applied in batches in the key stage of the rosette stage, and preferably liquid nitrogen fertilizer and high-potassium formula fertilizer are matched, so that the remarkable effects that the nitrogen is reduced by 20-35%, the yield is increased by 35-45%, and the income is increased by 1000-1200 yuan per mu are achieved; and an efficient, economic and sustainable technical scheme is provided for the large-scale production of the heading lettuce in areas with frequent low-temperature cold damage.

The application relates to the technical field of agricultural planting equipment, and discloses a rice seed cultivation device and method. The rice seed cultivation device comprises a cultivation box body, multiple cultivation growth modules, a temperature regulation module and a control end; the multiple cultivation growth modules are arranged in the cultivation box body in a spaced manner from top to bottom, and the internal space of the cultivation box body is divided into multiple independent cultivation growth areas; the temperature regulation module comprises a main heating element arranged at the bottom of the cultivation box body, an auxiliary heating element and a temperature sensing element; the auxiliary heating element comprises a heating execution part and a driving execution part. Through the cooperative working mode of the movable auxiliary heating mechanism and the fixed main heating mechanism and the active regulation strategy based on the environmental temperature prediction, the most sensitive area can be cooperatively heated and intervened in advance through prediction before the actual temperature in the box drops below the threshold value caused by the sudden drop of the external environmental temperature, so that the seedling cold damage is effectively prevented.

The application discloses a kind of peach fruit preharvest spray preservative and its spraying method, characterized by the following raw materials and mass percentage composition: 2-8% of brown algae oligosaccharide, 0.05-0.2% of gamma-aminobutyric acid, 0.5-2% of capric acid triglyceride, 0.1-0.3% of glycerol, 1-3% of Tween-80, 0.2-1% of sodium carboxymethyl cellulose, and the balance is water, the above-mentioned peach fruit preharvest spray preservative is sprayed on peach fruit, and the method comprises the following steps: selecting peach trees with consistent tree age and growth vigor, starting at 90-110 days after peach fruit blossoming, spraying peach fruit every 3 days, and spraying peach fruit surface uniformly in 3 times until the surface of peach fruit is in a dripping state, which has the advantages of increasing the rate of marketable fruit of picked peach fruit, prolonging the storage period of peach fruit, reducing the rot rate of peach fruit stored at room temperature, reducing cold damage during low-temperature storage, and maintaining the quality and taste of the fruit.

The invention relates to the technical field of plant genetic engineering, and discloses a wild potato low-temperature induced expression promoter ScMYB6 and application thereof. The invention provides a wild potato promoter ScMYB6 capable of responding to low-temperature treatment, the activity of the promoter is regulated and controlled by a low-temperature signal, the promoter has a function of regulating and controlling the expression of a gene to be remarkably up-regulated under cold injury and freezing injury treatment conditions, and the activity of the promoter under the freezing injury condition is higher than that under the cold injury condition; high application values are realized in low-temperature response and gene expression regulation of the plants.