169 results about "Arid" patented technology

The invention belongs to the technical field of hydrology and water resources, and discloses a cold and dry mountainous area drainage basin runoff simulation method based on an MIKE SHE / MIKE 11 coupling model in combination with GIS / RS data. According to the multi-source data fusion technology, a cold and dry mountainous area distributed input data set is constructed through TRMM satellite rainfall data, an MODIS LAI product and an ASTER DEM, and the rainfall space representation precision is improved by 40%. According to the model coupling mechanism, an MIKE SHE / MIKE 11 collaborative simulation framework is provided, earth surface-groundwater flow data interaction is achieved through river channel linkage, and the complex river network flood routing simulation error is reduced to 10% or below. According to the parameter partition calibration method, a drainage basin is divided into five hydrogeological regions, sensitive parameters such as a Manning coefficient and a hydraulic conduction coefficient are optimized in combination with a genetic algorithm, and the basic flow simulation precision is improved by 25%.

The invention discloses a method for predicting the irrigation amount of crops in an arid saline-alkali soil area and related equipment. The method comprises the steps that the potential evapotranspiration of a target crop is calculated through a double-source evapotranspiration mechanism model based on key meteorological parameters, obtained through prediction, of a target area, and the leaf area index and the plant height are dynamically updated according to the accumulated temperature process; respectively constructing different stress inhibition functions aiming at the attention salt ions and the pH value in the saline-alkali soil solution, and applying composite inhibition at the stomatal conductance and / or the apparent evapotranspiration resistance site to correct the potential evapotranspiration so as to obtain the ideal crop evapotranspiration corrected by the salinity and the pH value; and based on the corrected ideal crop evapotranspiration, predicting day-by-day irrigation amount and water distribution schedule suggestions in a future preset period. The method can solve the problem that current crop irrigation of saline-alkali soil in an arid inland region depends on experience, influences on different salt types and contents are caused, and quantitative analysis is lacked.

The invention relates to the technical field of ecological restoration of a coal mine in an arid region, and discloses an ecological restoration method for a waste dump of the coal mine in the arid region. According to the method, a multi-parameter environment sensing model containing soil humidity, soil components, surface temperature, vegetation indexes and regional gradient data is established, and whether ecological restoration is started or not is judged according to the model. And selecting at least one of water, a nutrient solution or a soil conditioner as a restoration medium, and quantitatively conveying the restoration medium to a predetermined area through an independent conveying path isolated from natural rainfall. The recovery area is composed of an independently-arranged conveying pipe network, the water flow direction is dynamically judged according to the gradient of the area, and natural diffusion advantage position pipe section conveying is preferentially started. During conveying, the operation time period is determined according to the medium absorption rate, intermittent conveying is executed on the selected pipe section, and the average flow in each cycle is controlled not to exceed the system reserve capacity. And when the reserve is insufficient, conveying is suspended, operation information is recorded, remaining operation continues to be completed after the reserve is recovered, and closed-loop recovery control is achieved.

The invention provides a power transmission and transformation project concrete mix proportion optimization method considering drought and cold region constraints, and relates to the technical field of design optimization. Key parameters are randomly allocated, and a time partition concept is adopted, so that the flowability and the hardening performance are respectively optimized in a concrete generation stage and a concrete hardening stage; through double screening of a fluidity index vector and a hardening index vector, the method ensures that the concrete has excellent resistance in a freeze-thaw cycle, and the service life of the structure is prolonged; the time position of the minimum freezing and thawing cycle number is selected through a simulation experiment, the defect that freezing and thawing influences are neglected in a traditional method is effectively overcome, the durability and reliability of concrete under the extreme weather condition are remarkably improved, and the optimization method can effectively reduce material waste and construction cost and is suitable for popularization and application. An economical and efficient solution is provided for concrete construction in the drought and cold areas, and the method has wide application prospects.

The application provides a kind of method and device for high-cold arid coal mine area vegetation damage repair, it is related to mine vegetation technical field, the present application is divided into sub-region to coal mine area, the water content monitoring is carried out to each sub-region, the meteorological data of meteorological station is combined, to analyze the evapotranspiration of each sub-region, combined with evapotranspiration, rainfall, vegetation water absorption, to analyze whether the water content of sub-region meets the requirement of plant growth, and output irrigation index reflecting the current demand irrigation degree of sub-region, while also image shooting and multispectral data acquisition are carried out to sub-region, generate greening evaluation index for reflecting the growth condition of sub-region vegetation, combined with greening evaluation index and irrigation index analysis, obtain sub-region repair index, finally output sub-region repair priority area, priority is carried out targeted vegetation damage repair to repair priority area, greatly improve repair efficiency.

The invention belongs to the technical field of biomedicine, and particularly relates to an animal model and a modeling method thereof. According to the method, the northwest dryness syndrome type sub-health animal model is successfully constructed, an open model evaluation mode is adopted, and the established model is evaluated through goodness of fit; furthermore, autumn pear syrup is used for indicating that the prescription corresponds to the syndrome. The northwest dryness syndrome type sub-health target model established by the invention can provide a stable and reliable research model for external dryness syndrome essence exploration, arid region sub-health prevention and treatment, drug effect and pharmacological mechanism research of traditional Chinese medicines, prescriptions and the like with body resistance strengthening and dryness moistening effects, health product research and development and the like. An open model evaluation mode is adopted, and the higher the goodness of fit is, the closer the model to the northwest dryness syndrome type sub-health target model is. The northwest dryness syndrome type square domain dryness evil sub-health rat model is more suitable for arid region sub-health status research, and the northwest dryness syndrome type autumn cause dryness evil sub-health rat model is more suitable for autumn moistening health care research.

The invention relates to the technical field of plant growth synchronous monitoring, in particular to a cold and arid mining area mine water and soil remediation and plant growth synchronous monitoring planting device which comprises a base, a supporting mechanism is installed at the top of the base, the supporting mechanism comprises a supporting rod, and the supporting rod is fixedly installed at the top of the base; a plurality of first sliding grooves are formed in the surface of the supporting rod, the fixing rings are slidably installed in the first sliding grooves, second sliding grooves are formed in the surface of the fixing rings, and the telescopic rods are slidably installed in the second sliding grooves. Through the arrangement of the supporting mechanism, a worker can directly judge the growth condition of plant branches through the position of a pointer on an indicating dial, an arc-shaped plate provides stable and adjustable clamping force through a spring, the arc-shaped plate can be precisely attached to plant stalks, measurement errors caused by clamping looseness are avoided, and the measurement accuracy is improved. The accuracy of stem diameter change data is ensured, and the quantitative requirement of experimental data is met.

The application discloses a tail water grading purification system for arid saline-alkali farmland, and discloses a purification method thereof, and belongs to the technical field of energy saving and emission reduction. Through the tail water detection system, the preliminary purification treatment system and the deep purification treatment system, and the purification treatment system comprising multiple water purification modules, multi-stage purification of the tail water of the farmland is realized. The whole system comprises three-stage detection, a special toxic detection module is arranged, the safety of the produced water is ensured, the recycling of the inorganic salt in the preparation process is realized, the whole process is controlled and decided through the central control system, the operation cost is reduced, the system is economic and practical, energy-saving and environment-friendly, and the problem that the tail water of the farmland is complex in composition, contains a large amount of inorganic salt, heavy metal ions and organic matter and is difficult to treat is solved.

The present application relates to the technical field of fruit tree propagation, in particular to a pear, plum or apricot germplasm resource nursery strip soil cutting method in cold and arid regions, first, one-year-old branches are selected, after disinfection, soaked in rooting mud containing humic acid and growth regulator, then, a cubic soil nub is dug in the rhizosphere of the mother plant, wrapped with non-woven fabric, injected with water-retaining agent, sprayed with humic acid potassium and chitin mixed solution, and inoculated with mycorrhizal fungi, finally, a planting hole is dug according to the set plant spacing, a straw root protection cover is set, the strip with soil is planted, water is poured thoroughly and slow-release fertilizer is buried. The technology effectively protects the root system and promotes rooting through comprehensive treatment, ensuring the rapid and high-quality construction of the resource nursery under the harsh conditions in the cold and arid regions. Through the triple root protection soil cutting technology, the survival rate of pear, plum, apricot and other deciduous fruit tree germplasm resource strips in cold and arid regions is increased from less than 60% of the traditional method to more than 85%.

This utility model discloses a storage device for generating water from air in arid desert areas, relating to the field of air-to-water technology. It includes a water storage tank, with a three-way valve threadedly connected to the tank opening. One end of the three-way valve has an air inlet, and the other end is fitted with an induced draft fan. A semiconductor cooling chip is installed inside the water storage tank, with a heat dissipation plate at the cooling end of the chip, located on the upper wall of the three-way valve. A filter tube is located at the lower end of the three-way valve, containing a nanofiber filter layer and an activated carbon adsorption layer. A pair of fixing rings are provided on the outer wall of the water storage tank, each threadedly connected with a fastening bolt. The semiconductor cooling chip is located directly above the filter tube. This utility model designs a simple air-to-water structure, offering strong convenience. It can continuously generate water while preserving water sources in deserts, increasing the water production capacity, making it highly practical.

The invention belongs to the technical field of ecological restoration, and particularly relates to a method for restoring vegetation of a transformer substation in a high-altitude cold and arid region. The method comprises the following steps: 1) soil preparation and fertilization, and growing point planning; 2, holes are formed in the growing points, and seedlings are planted after a growth promoter is put in the holes; and 3) growing point management. According to the method, within 60-90 days, the vegetation coverage of the exposed ground surface of the transformer substation in the cold and arid region can reach the coverage degree larger than or equal to 95%, the height smaller than or equal to 15 cm, the landscape is uniform, and the overwintering survival rate is larger than or equal to 92%; reseeding is not needed in the planting period; single species, low plants and few vertical wilt objects meet the fireproof requirement of the transformer substation; the total cost is reduced by more than 40% compared with the traditional turf laying method; the whole process is less in irrigation, only 2-3 times of water replenishing are needed, water is saved by more than 80%, the defects of slow lawn building, difficulty in overwintering and high maintenance cost in the prior art are overcome, and the method has practical popularization and application value.

The invention discloses an arid region underground water detection stratified sampling device, and belongs to the technical field of water quality detection, the arid region underground water detection stratified sampling device comprises a sampling barrel, at least two sealing assemblies are arranged in an inner cavity of the sampling barrel, a plurality of stratified sampling cavities are formed through the sealing assemblies, sample separation barrels are arranged in the stratified sampling cavities, and a plurality of sample separation boxes are arranged in the sample separation barrels in a surrounding manner; a trigger assembly is arranged on the inner side of the sample separation barrel corresponding to the sample separation box. According to the invention, through the designed expansion liquid bag, a medium can be fed into the expansion liquid bag through external pumping equipment, the expansion liquid bag can expand after liquid injection, the expansion liquid bag is unfolded to seal the opposite spaces on the two sides of the sampling barrel, a multi-partition layered sampling structure can be formed, and the sampling efficiency is improved by sealing different partitions. Compared with a traditional sampling mechanism with a single sampling cavity and valve switching, mixing of water at different layers can be avoided, and the sampling data precision is improved.

The invention discloses a drought forest fire disaster-inducing element extraction and identification method and system, a storage medium and a computer program product, and relates to the technical field of remote sensing disaster monitoring, and the method comprises the steps: collecting a multi-source data set of a drought forest fire region, and extracting disaster-inducing factors from the multi-source data, the multi-source data set comprising satellite data; performing time-space two-dimensional thermal anomaly recognition based on the satellite data, and obtaining a fire point recognition result in combination with a drought forest fire disaster chain anomaly index output by a pre-constructed drought forest fire disaster chain anomaly index extraction model; the drought forest fire disaster chain anomaly index extraction model is constructed based on a drought forest fire disaster chain knowledge model, and the drought forest fire disaster chain knowledge model is obtained based on spatial and temporal distribution relation analysis of disaster-inducing factors. Through collection of multi-source data, construction of a knowledge model and an anomaly index extraction model and space-time two-dimensional thermal anomaly identification, efficient identification and accurate extraction of disaster-causing elements of a drought forest fire disaster chain are realized.

The application discloses a kind of arid region coal-based solid waste recycling crushing device and method, belong to coal-based solid waste processing field.A kind of arid region coal-based solid waste recycling crushing device, including crushing box and with the screening box being communicated with crushing box, further include: the crushing assembly for being set in crushing box, for carrying out crushing to coal-based solid waste, wherein, the inner wall of crushing box is provided with protection assembly, and part of structure vibration in protection assembly can be driven when coal-based solid waste is crushed;Primary screening mechanism is arranged on the inner wall of crushing box, secondary screening mechanism is arranged on the inner wall of screening box, and secondary screening mechanism is communicated with primary screening mechanism by pipeline;The application can overcome the problem that coal-based solid waste crushing operation process is complicated, crushing efficiency is low, and screening equipment is easily blocked.

This utility model discloses a water replenishment device for arid desert ecosystems based on micro-moisture self-circulation in the field of soil replenishment equipment technology. It includes a water replenishment pipe with a seepage port at its bottom, buried within the desert soil. A rain collection tray and an air supply mechanism are connected to both ends of the water replenishment pipe, respectively, both located above the desert soil. A humidity sensor for detecting soil moisture is installed on the water replenishment pipe, and a humidity sensor for detecting air humidity is installed on the air supply mechanism. This utility model delivers water to the water replenishment pipe deep in the soil through the rain collection tray and delivers micro-moisture into the water replenishment pipe through the air supply mechanism. The warm air carrying the micro-moisture condenses in the water replenishment pipe, and the condensed water seeps into the soil through the seepage port, replenishing the desert soil's moisture and improving the desert ecological environment.

The invention provides a pond fishery and rice co-culture ecological breeding method. A pond planting area and an aquaculture area are included. A concentric-square-shaped planting circular groove is formed in the outer side of the pond planting area, a rice planting area is arranged in the planting circular groove of the pond planting area, and a water lifting and taking area is arranged on one side of the planting circular groove; a water storage pond and at least two land-based culture round ponds are arranged in the aquaculture area, water in the water lifting and taking area is conveyed into the water storage pond through a water suction pump, and each land-based culture round pond is communicated with a water inlet main pipe; the center of the bottom of each land-based cultivation round pond is further communicated with a drainage branch pipe and connected with a drainage main pipe through a water level limiting well, and the water outlet end of the drainage main pipe extends into the planting circular ditch and the rice planting area. According to the method, the industry development trouble that the height of pond culture water resources in the cold and arid region is limited is solved, the culture capacity is stabilized, the water resources are remarkably saved, the yield is increased, the planting and breeding benefits are improved, planting-breeding integrated efficient development is achieved, and the method is economical and practical.

This invention relates to the field of vegetation restoration equipment technology, and more particularly to a vegetation restoration device for engineering sites in arid river valleys. The device includes a vehicle body with symmetrically fixed support blocks on its upper surface. A drive motor is mounted on each of the two support blocks via a lifting block. The output shaft of the drive motor is equipped with a rotating rod and a spiral blade. A storage box is fixedly mounted on the vehicle body, and a discharge pipe is connected to the side of the storage box. A rectangular hole is formed on the upper surface of the discharge pipe, and a sealing plate is slidably inserted into the rectangular hole. A transmission assembly is provided on the vehicle body. After drilling, the device utilizes the cooperation of the discharge pipe, sealing plate, and transmission assembly to open one end of the discharge pipe in a short time, allowing the seeds in the storage box to automatically slide into the drilled hole. The operation is simple, eliminating the need for manual seed insertion, saving time and effort, effectively improving planting efficiency, and preventing seed loss.

The invention provides an unpowered air source water drawing device and method applied to an arid region, a water drawing device body comprises a condensate water collecting cavity located on the lower portion, an air condensation cavity is arranged above the condensate water collecting cavity, and a chimney type air duct is arranged above the air condensation cavity; the condensate water collecting cavity, the air condensing cavity and part of the chimney-shaped air duct are buried in the soil body, and an exhaust port is formed in the top of the chimney-shaped air duct; a photovoltaic PN junction patch for generating current is adhered to the outer wall of the upper part of the chimney-shaped air duct, and is electrically connected with an energy storage device and a refrigeration PN junction patch through a controller; the refrigeration PN junction patch is arranged on the air condensation cavity in a pasted mode and electrically connected with the energy storage device at the same time. An air inlet pipeline is arranged in the air condensation cavity, extends out of the chimney-shaped air duct and is used for introducing air; and a water collecting device is arranged in the condensate water collecting cavity. The device can be used for water drawing operation in the desert environment.

The application discloses a kind of self-compacting geopolymer concrete mix design methods considering arid cold region, and the application relates to the technical field of concrete mix design.It includes the following steps: obtaining self-compacting geopolymer concrete samples with different mix proportions, testing their flow characteristic parameters including T500 flow time, emptying time, setting time and mechanical characteristic parameters after hardening.Map the mix proportion and the corresponding parameters to generate a training sample set, and based on the set, establish a neural network model, and train to obtain a feature prediction model.Generate different mix proportion combinations through the known material addition range, input the feature prediction model to predict the flow and mechanical characteristic parameters.Calculate the mechanical performance parameters and combine the flow characteristic parameters to construct a fitness function.Using genetic algorithm to optimize the mix proportion combination, get the scheme with the highest fitness value, provide reliable protection for building construction in arid and cold regions, improve the safety and durability of the project.

A method and apparatus for cultivating vegetation at an arid location includes rooting vegetation in a mat combined with a super absorbent polymer; applying waste vegetation onto the mat; and installing a perforated cover sheet onto or suspended above the mat. The waste vegetation provides additional moisture and nutrients as it decays. The mat can be isolated from surrounding sand or soil by an underlying layer, and the waste vegetation and mat can be sufficient to support mature vegetation. A shade layer between the waste vegetation and the cover sheet can reduce sunlight intensity. The mat can be placed above a water reservoir, with at least one wick extending from the mat into the reservoir. The wick can include nutrients and / or fertilizer. The reservoir can be covered by a perforated lid. Downward extending hollow tubes, which can surround the wicks, can enable excess water to flow into the reservoir.

The invention discloses a high and steep slope strong freezing and thawing resistant vegetation block and a green low-temperature freezing preparation method and application, and aims at solving the core technical problems that an ecological restoration material is prone to structure instability, water and fertilizer are difficult to maintain, vegetation adaptability is poor, and construction is inconvenient. The method comprises the following steps: uniformly mixing soil, organic matters, a water-retaining agent, hydrothermal carbon and a slow-release fertilizer to obtain a substrate; then adding fibers and carrying out dry mixing to construct a three-dimensional reinforced framework; mixing a cementing agent, and stirring to prepare a flow-state mixture; laying in a mold by adopting a layered structure, and uniformly sowing suitable plant seeds on the surface layer to prepare a plant growing block prototype of the pre-buried seeds; through low-temperature freezing treatment and demolding air-drying treatment, the block is shaped into a block which is stable in structure, can be carried and assembled and is internally provided with a porous framework structure. The vegetation block has mechanical stability, excellent freeze-thaw resistance and ecological functionality, and is especially suitable for rapid ecological restoration of steep slopes in ecologically fragile environments such as Qinghai-Tibet Plateau and northwest cold and arid regions.

The application relates to a water resource pressure assessment method integrating social economy and climate change. It relates to the technical field of water resource pressure assessment in arid river basins. The method comprises the following steps: obtaining historical values and predicted values of social economic data, correcting the predicted values of the social economy to obtain corrected predicted values; calculating potential evapotranspiration in different scenarios based on historical scenario meteorological data and corrected future climate mode data; calculating future basin water resources based on the correlation between basin rainfall and water resources; extracting drought intensity characteristics according to the change trend of the historical scenario and the future scenario basin drought index; constructing a basin water resource pressure index calculation formula; and according to the calculated water resource pressure index of the water resource region, standardizing the index to obtain a standardized index, and evaluating the change trend of the water resource pressure of the region in different scenarios according to the standardized index. The method solves the problem of quantification and evaluation of basin water resource pressure under complex conditions.

The invention discloses a water and soil loss treatment method for a soil slope of an arid mining area. The method comprises the following steps that S1, decomposed cattle and sheep manure barnyard manure is spread on a loose sandy slope; s2, sowing seeds: selecting peripheral indigenous desert plant perennial herbs and shrub seeds to be mixed and sown according to the equal mass ratio; s3, the slope is covered with a vegetation blanket; s4, selecting peripheral local desert plant annual herbaceous and perennial herbaceous seeds to be mixed and sown on the surface of the vegetation blanket according to the equal mass ratio. Under the conditions of extremely low precipitation and barren soil, water and soil loss of the side slope is rapidly and remarkably controlled with the investment far lower than that of engineering measures, restoration of the ecological function of the side slope soil is synchronously started and accelerated, and finally a side slope ecological system is guided to succession towards a stable state with the self-maintaining capacity. The comprehensive technical effects of controllable treatment cost, lasting effect and ecological sustainability are achieved.

The invention belongs to the technical field of plant bioengineering, and discloses a KASP primer group for detecting wheat plant height and yield synergistically improved QTL locus QPH-6A and application, the primer group is designed for SNP loci at the physical positions 11, 164 and 425 bp of wheat 6A chromosomes, and the primer group comprises two specific forward primers for different alleles and a universal reverse primer. By utilizing the primer group and the detection method provided by the invention, whether the wheat material carries the QPH-6A excellent allele or not can be quickly and accurately identified. The excellent allelic gene has a unique'dwarfing without yield reduction 'genetic effect, and the thousand seed weight, the ear length and the ear seed number can be remarkably increased while the plant height is reduced to a suitable lodging-resistant range (75-85 cm). According to the invention, the problems of too short plant, reduced biomass, premature senility and the like caused by the traditional dwarf gene in arid ecological regions such as Xinjiang are solved, and an efficient breeding tool is provided for cultivating a new high-yield ideal plant type wheat variety suitable for an arid environment.

The application discloses a Xinjiang cold and arid slope risk prevention and control method based on a knowledge graph, belongs to the technical field of cold and arid region slope disaster risk prevention and control, and aims at solving the problems of non-uniform data format, weak correlation and insufficient prevention and control measures matching of cold and arid slope disasters. The application realizes the technical effects of improving the risk chain identification accuracy and the measure matching by constructing a heterogeneous space-time knowledge graph, generating multiple types of vectors, adopting a space-time graph transformation coding model to identify the instability chain and search similar cases, outputting a risk level, a treatment priority and recommended measures.

This invention relates to an adaptive learning-based crop growth prediction system and method for arid regions, encompassing the field of crop growth prediction. It generates environmental baseline features and physiological representation vectors by simultaneously acquiring ground environmental data, remote sensing physiological images, and historical yields, thereby constructing a multi-dimensional state-space model. The model is then input into a dynamic model containing physiological response sensitivity parameters, and a set of expected growth trajectories under various water supply conditions is generated through difference equations. Based on this, a marginal yield loss matrix is ​​constructed, and differential resource allocation vectors for each sub-region are output under total water resource constraints. Furthermore, the crop growth model is dynamically corrected and the marginal yield loss matrix adjusted using the residual discrepancy between real-time physiological feature values ​​and predicted trajectories. This invention achieves accurate simulation of crop growth status and optimized water resource allocation, possessing adaptive learning and disaster mitigation capabilities.

The application relates to the technical field of ecological protection, and discloses a vegetation community configuration management system for ecological restoration of a dry valley, which comprises a multidimensional acquisition module, a community analysis module, an ecological evaluation module, a treatment analysis module and a configuration management module. The system fuses data through the multidimensional acquisition module, the community analysis module quantifies the growth tendency of the vegetation community in terms of functional composition, vertical structure and stand type through growth indicators, the ecological evaluation module comprehensively reflects the supporting capacity of topography and soil factors on the vegetation habitat through site index, the multidimensional evaluation has high precision, the treatment analysis module evaluates the comprehensive effect of a treatment scheme in terms of water source regulation, soil improvement, vegetation restoration and erosion control through efficiency index, the configuration management module judges the intervention level of the ecological environment in the dry valley region, the improvement level of site conditions, and the adaptation level of the treatment scheme, outputs corresponding judgment results and response measures, and has good intelligent management and protection effect.

The application belongs to the technical field of biochar application, and provides a biochar arid region agricultural application method, which comprises application of biochar to total nitrogen content of soil in monoculture and intercropping planting modes; the application utilizes physical characteristics such as water retention of biochar to improve soil nutrient availability and crop nutrient utilization efficiency; biochar in different planting modes significantly reduces total nitrogen content of soil in a 60-160cm soil layer, and the better the adsorption effect of biochar on total nitrogen content of soil, the more conducive to nitrogen requirement of crops in the growth and development process; intercropping planting mode significantly improves nitrate nitrogen content of soil in a 0-160cm soil layer, and addition of biochar can obviously reduce leaching risk of nitrate nitrogen, can reduce leaching loss amount of water-soluble ions such as nitrate nitrogen, and delay migration and conversion time; monoculture planting mode significantly improves ammonium nitrogen content of soil in a 0-160cm soil layer, and addition of biochar can obviously reduce loss risk of ammonium nitrogen, and is conducive to growth and development of crops.

This invention discloses a method for improving the curing quality of upper tobacco leaves under arid conditions. This method targets upper leaves in arid climates, characterized by a compact structure, low leaf water content, and water bound to cellular tissue. During the yellowing stage, a dry-bulb temperature of 42-43℃ and a wet-bulb temperature of 38-39℃ are used to keep the stomata on both sides of the leaf open, ensuring the smooth removal of moisture from the tobacco leaf and allowing O2 from the curing barn to continuously enter the leaf through the stomata, aiding in the degradation of macromolecular organic matter and thus guaranteeing the quality of the tobacco leaf. This invention improves the curing quality of upper leaves under arid climates and reduces the occurrence of ash and discoloration during the curing process.

The application belongs to the technical field of interplanting mode on root morphological characteristics and yield analysis, in particular to an efficient irrigation planting method for isatis indigotica and soybean interplanting, which comprises the following steps: step one, selecting test field: field test is carried out in May-October, 2023 in Hongshuihe Management Office Yimin Irrigation Test Station in Minle County, Zhangye City, Gansu Province, which is a representative basic irrigation test center in the northwest cold and arid region; step two, test design: the test is a double-factor test, a total of 8 treatments, soil moisture is set in two gradients, W1 and W2, W1 is soil moisture content of 55%-65% of field capacity, W2 is soil moisture content of 70%-80% of field capacity; interplanting modes are single isatis indigotica, single soybean, isatis indigotica 6 rows and soybean 6 rows, isatis indigotica 12 rows and soybean 6 rows, respectively marked as M1, M2, M3 and M4; the test has a total of 8 treatments, 3 groups of repetitions, a total of 24 plots; the soil moisture control depth of film mulching drip irrigation is 60cm; step three, determination index and analysis.