98 results about "Populus euphratica" patented technology

The invention discloses a method for planting Populus euphratica in a heavy saline-alkaline land of a Gobi desert. The method comprises the steps of: applying 5kg of organic fertilizers in a tree pit during Populus euphratica planting, then putting the roots of the Populus euphratica in water-retaining root-promoting halophilic-basophilic microorganism root dipping solution, planting a Populus euphratica seedling and applying 1000ml of water-retaining root-promoting halophilic-basophilic microorganism root dipping solution around the roots, wherein the water-retaining root-promoting halophilic-basophilic microorganism root dipping solution comprises the following components in parts by weight: one part of halophilic-basophilic microorganism solid bacterial manure for a desert saline-alkaline habitat, one part of sterilization soil, two parts of water, 0.1 part of water retaining agent and 0.002 to 0.005 part of growth hormone. The new method for planting the Populus euphratica in the heavy saline-alkaline land of the Gobi desert has the advantages that the soil salinity and alkalinity can be effectively reduced in a long term, the survival rate of the planted Populus euphratica reaches 100 percent, the growth condition is continuously good and the problem that the survival rate of trees planted in the heavy saline-alkaline land of the arid desert is fundamentally solved.

The invention relates to a diversifolious poplar root pruning tillering asexual propagation method, which is characterized in that: an asexual propagation characteristic that a horizontal root of the diversifolious poplar in an upper soil layer can be tillered into an adventitious bud which can be further grown into young shoots is utilized, on the basis that a growth and propagation rule of the desert riparian forest diversifolious poplar in an arid region and surface hydrology distribution temporal and spatial characteristics in the region are followed, before the sprouting of the diversifolious poplar roots in every spring, partial horizontal roots in the upper soil layer are artificially pruned, an irrigation practice is adopted, and the horizontal roots of the diversifolious poplar in the upper soil layer are stimulated through artificial disturbance so as to promote the asexual propagation of the diversifolious poplar of desert riparian forest in the amid region, to prevent the updating hypodynamia and aging development trend of the degenerative populus euphratica oliv. population, to further accelerate the ecological restoration process of the populus euphratica oliv. population, to promote the updating of the degenerative of the populus euphratica oliv. population and to realize the favorable evolution of the desert riparian forest ecological system plant community structure.

The invention relates to a rapid method for improving carbon sequestration of soil in an arid desert area, which includes: according to soil temperature, soil properties and carbon sequestrating mechanism of the arid area, effectively using salsola collina, field weed, and directly and manually fixing surface organic carbon portions of salsola collina into the soil; and allowing plants of salsola collina to decompose to improve soil environment for growth of root systems of populus euphratica and quicken development of the root systems of populus euphratica, and accordingly increasing organic carbon in subsoil to compensate loss that severe decline of populus euphratica forest due to great decrease of underground water level of the arid desert area causes decrease of carbon sequestration of the ecological system.

The invention relates to a grafting method capable of promoting asexual reproduction of populus euphratica. The method comprises the following steps: (1) irrigation and pest control before grafting; (2) selection of a rootstock: selecting annual Populus bolleana as the rootstock, wherein a tree trunk of the Populus bolleana is straight from top to bottom, and the Populus bolleana is vigorous in growth and full in scion; (3) selection of populus euphratica scion: selecting a bud as the populus euphratica scion, wherein the middle portion of a seeding branch is full, the seeding branch has 4-6 buds and lengths of the buds is 8-12 millimeters; (4) cutting a cross-shaped incision on a rootstock Populus bolleana trunk at a height of 1-1.2 meters with a grafting knife, and levering the incision; (5) clipping the lower end of a populus euphratica scion lower bud into a rhombus and obtaining a clipped populus euphratica scion; (6) inserting the clipped populus euphratica scion into the incision position around the Tomb-sweeping Day and binding tightly, and then the grafting is finished; (7) irrigating and fertilizing timely after the grafting is finished; and wiping off all the buds ready to sprout when the populus euphratica starts to sprout, and spraying pesticides when 3-4 true leaves grow on the populus euphratica seedling. The grafting method capable of promoting the asexual reproduction of the populus euphratica can effectively stop a populus euphratica population from being weak in regeneration and aging.

The invention discloses a method for increasing survival rate in transplanting populus euphratica shoots in an extremely arid desert area. The method includes the steps of populus euphratica shoot preparation, plant pit preparation, bacterium agent selection, transplanting vaccination and plant pit coverage. Formation of arbuscular bacteriorhiza in populus euphratica shoot roots is mainly promoted by means of one-time replenishing a moses ballon mold agent during transplanting of the populus euphratica shoots, so that the survival rate in transplanting the populus euphratica shoots can be increased, and drought resistance of the populus euphratica shoots can be improved. A novel method is provided for conservation and recovery of natural populus euphratical forests in the arid areas and manually structuring populus euphratical forests in the extremely arid desert areas.

The invention relates to the technical field of forestry pest and disease monitoring, and relates to a populus euphratica forest spring inchworm disease monitoring method based on hyperspectral remotesensing. The method comprises the following steps: the first step, performing spectrometry on sample trees by a spectrometer to obtain ground hyperspectral data of all plants in the monitoring area,the second step, respectively processing the ground hyperspectral data of the healthy plants and the damaged plants obtained, the third step, performing characteristic analysis on the populus euphratica spectrum, and monitoring the populus euphratica forest spring inchworm disease degree by using the red edge effect, the fourth step, establishing a populus euphratica forest spring inchworm diseasemonitoring model based on the red edge characteristic parameter, and the fifth step, inputting the Hyperion data of the area to be monitored into the populus euphratica forest spring inchworm diseasemonitoring model based on the red edge characteristic parameter. The research of the method clarifies the remote sensing spectral information characteristic of populus euphratica under the influenceof spring locust pest stress, and provides a theoretical basis for exploring the extraction technology of populus euphratica forest spring inchworm disease information and developing a practical remote sensing dynamic monitoring technology.

The invention provides a PopuIus euphratica Oliv cultivation method comprising the following steps: 1, seed collection; 2, seed pretreatment; 3, seed threshing; 4, seed retreatment; 5, seedling bed preparation; 6, sowing; 7, post-sowing management; 8, seedling stage management: watering and fertilization, weeding and thinning seedlings, insect disease control, nursery stock transplanting and overwintering protection; 9, nursery stock outplanting. The PopuIus euphratica Oliv seeds processed by the method can improve the germination capacity, and seed processing cost can be saved, thus solving the problems of slow seed germination and untidiness of seedling emergences; seedling growing difficult conditions by a conventional method can be simplified in seed breeding, the process is fast, and seed seedling growing popularization can be performed in production.

The invention discloses a populus euphratica wooden bead production method, and belongs to the field of jewelry accessory processing. The production method comprise the following steps that firstly, wood of populus euphratica with an age more than 5 years is selected; secondly, the selected wood is made into square strips, balls are formed after the square strips are processed by an ordinary woodworking milling machine, and according to the rigidity of the wood, the rotary speed of a chuck and a cutting head is regulated and selected; thirdly, coarse grinding is carried out, a woodworking grinding machine tool is in use, wood-used abrasive paper ranging from 80 meshes to 320 meshes is selected, the rotary speed ranges from 400 revolutions per minute to 1700 revolutions per minute, and the used time ranges from 80 minutes to 150 minutes; fourthly, fine grinding is carried out, the woodworking grinding machine tool is in use, according to the rigidity of the wood and the polishing position, wood-used abrasive paper ranging from 180 meshes to 2000 meshes is selected, the rotary speed ranges from 200 revolutions per minute to 800 revolutions per minute, grinding is carried out in twice, in the first time, the abrasive paper used time ranges from 60 minutes to 120 minutes, and in the second time, the abrasive paper used time ranges from 30 minutes to 60 minutes; fifthly, punching is carried out, and according to the wood, the rotary speed is selected and regulated between 500 revolutions per minute to 2100 revolutions per minute. Wooden beads and bead strings are formed by processing of the populus euphratica, and wooden bead accessory lovers are deeply fond of the wooded bead and the bead strings.

The invention discloses a method for rapid cutting propagation of populus euphratica in a light saline-alkali soil greenhouse. The cutting propagation method is conducted by using branches of adult healthy populus euphratica in February and includes the steps of cutting wood picking, root promoting, bowl breeding and seedling hardening. The branches of the adult healthy populus euphratica guarantee that sufficient nutrients are stored in scion bodies, and root promoting is conducted before cuttage, so that root original bodies exist on root sections during cuttage, and the survival rate of scion cutting propagation is increased; meanwhile, the cutting propagation time of the populus euphratica is greatly shortened, the propagation efficiency is improved, especially branch root promotion and bowl breeding are both conducted in the light saline-alkali soil environment, so that the change difference between the growth environment of saline-alkali soil after cuttage branch propagation andtransplanting and soil growth conditions is small, transplanted cuttage plants can easily survive, the survival rate is high, and the transplanting survival rate is 85% or above.

The present invention relates to fast populus diversifolia breeding technology, and fast tissue culture method for fast breeding populus diversifolia and the formula of culture medium. The fast tissue culture technology includes selecting explant and bacteria-free treatment, inoculating and differentiating culture, rooting, hardening off and transplanting. The explant is healthy tender twig of selected populus diversifolia mother plant. The method of the present invention is feasible and is suitable for culturing great amount of populus diversifolia seedlings.

The invention provides a cutting seedling technique. The cutting seedling technique can avoid the situation that the survival rate of Populus euphratica twig cutting is low, can improve the cultivation environment of Populus euphratica nursery stocks by improving the treatment chemical of cutting stems and post management, and then remarkably improve the survival rate of the Populus euphratica twigs. The cultivation technique is simple in step, is low in production cost, and can improve the survival rate of the Populus euphratica nursery stocks to more than 90%.

The invention belongs to the technical field of riverbank soil body lateral scouring parameter quantification, and discloses a method for preventing water and soil loss through the influence of a populus euphratica root system on the riverbank soil body lateral scouring. The method comprises the steps of selecting the populus euphratica root system along the bank of the Tarim river, and arrangingthe populus euphratica root system in a soil body to form a root-soil composite bank slope soil body; performing an anti-impact characteristic test on the obtained root-soil composite bank slope soilbody to obtain the anti-impact characteristic indexes of the soil body under different root system characteristics; and according to the change rule of the starting shear stress and the scouring coefficient under the influence of the populus euphratica root system, obtaining a quantitative relation between the river bank soil body starting shear stress and the root system volume density and the soil body dry density under the influence of the root system and a quantitative relation between the scouring coefficient and the root system volume density and the soil body dry density. According to the present invention, the influence rule of a typical desert vegetation root system on the river bank soil body impact resistance is analyzed, the quantitative relation is determined, the calculationformula of the starting shear stress and the scouring coefficient of the river bank soil body under the influence of the root systems is given, and the theoretical reference is provided for the riverbank lateral scouring.

The invention discloses a process for extracting salicin from populus euphratica fallen leaves. The process is characterized by comprising the following steps: adding calcium oxide into populus euphratica fallen leaf shreds, and adding water for decomposing; extracting the solution twice at the temperature of 30 DEG C, collecting filtrate, and combining the filtrate; adjusting the pH value to 10.0-12.5, allowing the solution to stand, and collecting the filtrate; concentrating the filtrate, adding a clarifying agent or an adsorbent for decolorizing while stirring at the temperature of 70 DEG C, and colleting the filtrate; adjusting the pH value to 3.0-5.0 at a normal temperature, allowing the solution to stand, and collecting the filtrate; adding ammonium water or ammonia gas into the filtrate for adjusting the pH value to 7.0-9.0, concentrating the filtrate till the specific weight is 1.2, and crystalizing the filtrate at the normal temperature in a static manner for 72 hours; and separating a crystal, drying the separated crystal at 80 DEG C, and smashing the dried crystal. The process has the beneficial effects that water with low environmental pollution is taken as an extraction solvent, so that the production cost and the workshop requirement are lowered; ash is removed by adopting sulfuric acid or sulfate, and the crystal is obtained through the crystallizing step, so that the purity of a final product is increased, and can be over 65 percent in general; and natural fallen leaves of populus euphratica in autumn are taken as raw materials, so that damage to vegetation is prevented.

The invention relates to a populus euphratica PeMIPS1 gene and application thereof, and belongs to the field of plant molecular biology. A DNA (Deoxyribonucleic Acid) fragment containingthe populus euphratica PeMIPS1 gene is separated and applied by the invention, the length of a nucleotide sequence is 1533bp, and the sequence number is SEQ. NO. 1; the number of corresponding amino acid sequencesis 510, and the sequence number is SEQ. NO. 2. The DNA fragment is capable of enhancing the resistance to stress given to high salinity and heavy metal copper by populus tremula; a salt-resistant andheavy metal copper-resistant popular tremula new variety cultivated by utilizing the populus euphratica PeMIPS1 gene will has wide application value in plant restoration.

The invention relates to a method for performing high frequent induction regeneration of populus euphratica leaves for plants and belongs to the technical field of populus euphratica leaf regenerationmethods. According to the method disclosed by the invention, by optimizing a basal culture medium and culture conditions, a phenomenon that leaves are yellowed and are difficult to regenerate after three-generation passage of populus euphratica in the past is avoided. The method disclosed by the invention comprises the following steps: on the basis of improving cultivation conditions of tissue culture seedlings, taking leaves as explants, performing adventitious bud induction, subculture, strong seedling culture, rooting culture and other technical links, and finally establishing a method system for performing high-efficiency regeneration induction of the populus euphratica leaves for regeneration plants. The method is capable of realizing high-efficiency regeneration of in-vitro populuseuphratica leaves and has the advantages of excellent reproducibility, high production efficiency and the like, the regeneration rate of adventitious buds can reach 98% or higher, the defect that thepopulus euphratica is difficult in seedling propagation under natural conditions is effectively overcome, rapid propagation in vitro is realized, and a foundation is laid for realizing genetic transformation and planting resource improvement of the populus euphratica.

The invention relates to the technical field of forestry pest and disease damage data remote sensing analysis, in particular to a remote sensing prediction method for an occurrence period and an occurrence amount of populus euphratica spring cankerworms. The method comprises the following steps of 1, building a spring cankerworm occurrence period prediction model based on an effective accumulatedtemperature rule; 2, calculating pest state remote sensing models based on the effective accumulation temperature rule, and predicting temperatures of pest states; 3, predicting the occurrence degreeof the populus euphratica spring cankerworms; and 4, checking a prediction result. According to the method disclosed by the invention, the populus euphratica cankerworms are used as research objects;and according to a life history rule of populus euphratica defoliators, and in combination with field sampling and field survey, calculation and analysis are performed to prove that the leaf consumption of spring cankerworm larvae during the occurrence of the two-instar larvae is not greatly increased yet, egg hatching enters beginning and ending periods, and the four-instar defoliators of the spring cankerworms basically does not occur, so that the optimal prevention control time is the occurrence period of the two-instar larvae, and the pest damage occurrence rate can be effectively reducedby performing prevention control in the period.

The invention relates to a method for planting populus euphratica in saline and alkaline land. The method comprises the steps that pits are dug in the saline and alkaline land, wherein the pits are dug according to the requirements that the plant spacing is 5 m, the line spacing is 5 m, the diameter is 80 cm, and the depth is 80 cm; microbial fertilizer is applied at the bottoms of the pits, the microbial fertilizer and bottom soil are mixed to be uniform, and populus euphratica plants are put into the pits and covered with soil; a pit with the diameter of 30 cm and the depth of 40 cm is dug between every two adjacent populus euphratica plants and wetted with fresh water, microbial fertilizer is applied, and nitraria tangutorum plants are put into the pits according to the specification of about 200 plants per mu and covered with soil; planting soil is spread on the surface; after field planting is conducted, free flooding irrigation is conducted; daily management of the trees is conducted; pruning and weeding or pest control are conducted. According to the method, saline-alkaline land reclamation is conducted by taking the populus euphratica as a main means, cooperating with planting of the nitraria tangutorum plants and coordinating with the microbial fertilizer, soil of a planting area is effectively improved, the PH value of the soil is decreased to 7.1, the alkalization degree of the soil is decreased to 2.5%, the salt content is decreased to 0.15%, the survival rate of the plants is 95% or above, and economic benefits are significantly increased.

The invention relates to a method for estimating the transpiration water consumption of a populus euphratica forest. The adopted technical scheme is as follows: the method comprises the following steps of: calculating the effective photosynthetic radiation quantity; calculating the saturation vapour pressure difference; establishing a model; estimating individual diameter-class distribution in the populus euphratica forest; establishing a diameter class and sapwood area fitted equation; and calculating the transpiration water consumption. By means of the method disclosed by the invention, a model simulation method is adopted; a variable, namely the sap flow velocity, depending on field measurement is derived by utilization of two easily obtained data including the effective photosynthetic radiation quantity and the vapour pressure difference; the individual diameter-class sizes in the populus euphratica forest are estimated according to an individual diameter-class distribution model; scale deduction from a single populus euphratica to the populus euphratica forest is realized; and the transpiration water consumption is calculated through a definite integral method according to populus euphratica growth characteristics. According to the method for estimating the transpiration of the populus euphratica forest disclosed by the invention, according to an environment where the populus euphratica forest is, the effective photosynthetic radiation quantity and saturation vapour pressure difference parameters are adjusted; therefore, the estimation method can be widely suitable for calculating the transpiration of the populus euphratica forest under multiple site conditions; therefore, field observation limitation can be gotten rid of; the transpiration of the populus euphratica forest in the past time period is recalled; the transpiration of the populus euphratica forest in the future time period is predicted; and thus, theoretical basis is provided for developing protection of plant species and prompting ecological construction.

The invention relates to a treatment method for dry and desert soil and belongs to the technical field of desertification treatment. According to the invention, after composting, slightly rotten wood and straws are taken as nutrient sources and used to provide nutrients to plants; then, populus euphratica is planted on edges and taken as a wind-proof and sand-blocking belt; sea-buckthorn is planted as a sand stabilization belt; during plantation, plantation pits are filled with the compost which provides the nutrients for growth of plants, and growth space is provided for the plants after complete degrading of the compost; after the plantation, a self-made sand solidification agent is paved to the sand surface; carboxymethyl cellulose and aminoguanidinium sulphate are grafted, so more hydrophilic groups are introduced, and water retention capacity is enhanced; the cellulose has high viscosity, so originally loose sand particles can be glued into large stable bodies and sand stabilization could be achieved; and then, water irrigation is conducted. According to the invention, the desert soil can be treated effectively; and the change rate of the moisture content in the soil is 5-8% within two to three months.

The invention relates to the technical field of prevention and control of inchworm diseases and insect pests of populus euphratica, in particular to dynamic simulation method for a spreading process of Apocheima cinerarius Ershoff based on a CLUE-S model. The method comprises the following steps: step 1, collecting basic data of insect pests of the ectropis obliqua of a research area; 2, extracting to-be-analyzed inchworm pest data of the populus euphratica in the research area; 3, simulating the Apocheima cinerarius Ershoff based on the CLUE-S model, and 4, based on simulation prediction analysis, the spreading of the ectropis obliqua has a gallery effect; And 5, verifying the gallery effect. Remote sensing means and CLUE- S model carries out spatial dynamic research on the inchworm insect pest information of the populus euphratica; The method can be used as a basis for remote sensing extraction of the euphrasia cristata insect pest information in other areas, provides an early warning effect, can realize targeted prevention and control of euphrasia cristata insect pest disasters, promotes development of a comprehensive prevention and control technology with ecological control asa core, and provides reliable time points and azimuth points for proposing prevention and control measures.

The invention discloses a drug for controlling a rust disease of populus euphratica and a preparation method of the drug. The drug comprises red willow leaves and / or immature stems, triadimefon or tebuconazole, urea and water. The use efficacy of triadimefon or tebuconazole is improved by the aid of a cosolvent, meanwhile, the capability of the populus euphratica for relieving infection of the rust disease is improved, and the growth potential of the populus euphratica is promoted. The red willows are naturally not infected with the rust disease, so that an environment unfavorable to the rust disease can be formed; meanwhile, soup cooked with the red willow leaves and / or immature stems is slightly acidic, and dissolving of triadimefon or tebuconazole can be facilitated; the urea can supply nutrition to the populus euphratica, and the growth potential of the populus euphratica is promoted. Therefore, the soup cooked with the red willow leaves and / or immature stems is mixed with 15% triadimefon wettable powder and 25% pentazole wettable powder, the mixture is mixed with the urea and sprayed to the populus euphratica, and the rust disease of the populus euphratica can be controlled. Material resources are environment-friendly, the preparation is simple, the use effect is remarkable, and no phytotoxicity is generated.

The invention discloses a pit digging machine for populus euphratica planting in an arid soil area. The machine structurally comprises a fixing frame, an extension frame, a sleeve ring, a driving motor, a soil digging column, spiral stirring pieces, a digging head, a loosening and tightening ring and a hydraulic rod, wherein a bottom nail of the extension frame is connected above the fixing frame,and the top of the sleeve ring is electrically welded below the top of the extension frame. According to the pit digging machine for populus euphratica planting in the arid soil area, after the pit digging machine completes pit digging, the machine is not pulled out of soil, but the driving motor is started to enable the machine to rotate reversely to output reverse current to enable an electromagnet to change the magnetic field direction thereof, a soil expanding rod is pushed out, an advancing and retreating rod is pushed out and inserted into an obliquely downward place in a bottom pit, meanwhile, relatively moist air is output through a soil loosening hair needle and a water expanding cavity so as to enable the periphery of the soil to become looser, populus euphratica can take root better after planted, the root system can stretch downwards more easily, and the populus euphratica is easier to survive.

The invention relates to the field of soil improving agents and particularly relates to a soil improving agent for saline-alkali land in south Xinjiang. According to a main technical scheme, the soilimproving agent is prepared from, by mass, 120 parts of soybean cake, 150 parts of cow dung, 200 parts of mushroom residues, 200 parts of straw, 90 parts of Populus euphratica scraps, 80 parts of pineneedles and 80 parts of enzymes. The soil improving agent increases soil organic matters and makes hydrophilicity high and is also suitable for microbe attachment, growth and reproduction, and large-scale microbe reproduction can induce formation of a soil aggregate structure, thus improving hardening, water permeability and air permeability of the saline-alkali land, facilitating crop growth, and reducing influences of salts of dry land on crop roots. The soil improving agent contains a certain amount of the straw which is difficult to decompose, and through ploughing of the soil improving agent into the saline-alkali land, soil looseness is improved, alkali return caused by capillary phenomena is solved, and overall improvement of the soil is facilitated.

The invention relates to a method for increasing organic carbon sequestration of saline arbor-shrub plants in an arid desert area. According to the method, holes are dug at 50-250cm positions of the tree-shrub plants at the surface temperature of 10-20 DEG C in autumn or at the early vigorous growth stage of arbors and shrubs in a next year, the arbors include gray poplars, populus euphratica or Russia poplars, the shrubs include halostachys caspica, calligonum rubicundum, anabasis, tangutorum bobr, kalidium, physophora, tamarix, lyceum ruthenium, salsola subcrassa or halocnemum, nitrate nitrogen is sprayed into the holes, growth and development of underground branch roots of the saline arbor-shrub plants are promoted by sprayed nitrate nitrogen nutrition, more biomasses generated by photosynthesis of the plants are distributed underground, root-canopy ratio increase is further promoted, the growth amount of an underground root system is increased, and long-term storage of underground organic carbon of the plants is increased to compensate loss of carbon sequestration capacity reduction of an ecological system due to vegetation decline in the arid desert area.

The invention discloses a method for artificially promoting the rapid forest establishment of populus euphratica young forests, and relates to the field of agriculture. The method for artificially promoting the rapid forest establishment of the populus euphratica young forests specifically includes the steps that a planting land is selected, soil of the planting land is fertile and loose sandy loam or light saline-alkali soil, an excavating device is adopted to excavate a plurality of deep planting holes, and nursery gardens are laid in the deep planting holes; after seedlings grow into finished saplings, the bred finished saplings are moved into the nursery gardens, and the roots of the saplings are protected through an auxiliary growth device; a plastic film is laid on the nursery gardens; and the roots of the saplings are irrigated regularly, so that the roots of the saplings and root soil are completely infiltrated. The situation that when the populus euphratica saplings are cultivated, a stable growth environment can be provided for the saplings, the saplings can stably and rapidly grow in the mature period, rhizome damage of the transplanted saplings is reduced, and the deathrate of the saplings is reduced is achieved, so that the rapid forest establishment of the populus euphratica is achieved.

The invention discloses a cultivation method for regeneration seedlings of a hybrid of populus simonii and populus euphratica. The cultivation method is characterized by comprising the following steps: establishment of an explant sterilizing and sterility system, adventitious bud induction and proliferation, rooting culture and acclimatization and transplantation. According to the invention, by adopting a tissue culturing method, rapid propagation of populus simonii and populus euphratica high-quality test-tube plantlet is realized within relatively short time, and only about 60 days are needed from cluster buds induction and proliferation to test-tube plantlet rooting in the whole propagation process, and thus greatly increasing the plantlet formation speed of populus simonii and populuseuphratica, having important functions for the large-scale and industrialized production and propagation of plants of populus simonii and populus euphratica, and continuously supplying high-quality nursery stocks for saline land reclamation of the dry desert region and afforestation in the desert region in the northwest of China.

The invention discloses an underground water level monitoring device and a populus euphratic forest ecological water requirement forecasting and early warning method. The monitoring device comprises an underground water observation well which is excavated in the ground of a to-be-monitored area, a throw-in type liquid level transmitter is arranged in the underground water observation well, and isconnected with a data acquiring module of the outside, the data acquiring module transmits data to an environment monitoring cloud platform through a GPRS wireless transmitting module, and the environment monitoring cloud platform transmits information of populus euphratic forest ecological water requirement forecasting and early warning for mobile equipment with the reserved number; and the dataacquiring module is connected with a double-line automatic conversion and power supply system, the double-line automatic conversion and power supply system is provided with two lines of solar power supply systems which are arranged in a redundancy manner, and the two lines of solar power supply systems supply power through a double-power-supply automatic conversion switch. A populus euphratic forest ecological water requirement evaluating system is established reasonably, influences of change of underwater level to growth of populus euphratica can be accurately evaluated, underground water level monitoring is combined to forecasting and early warning, and the populus euphratic forest ecological water requirement evaluating result can be known through the mobile equipment.

The invention relates to a bitter gourd biological fresh-keeping agent, and a preparation method and a use method thereof. The biological fresh-keeping agent is prepared by the following steps: addingwater into green herbal medicines including populus euphratica leaves, aloe, polygonum cuspidatum and garlic bulbs, and cooking and cooling; and filtering to obtain clear liquid, namely the biological fresh-keeping agent. The bitter gourd biological fresh-keeping agent disclosed by the invention can form a protective layer on the surfaces of fruits, loss of moisture and nutritional ingredients iseffectively prevented through plastic preservative film packaging; meanwhile, the antibacterial components in the biological fresh-keeping agent can effectively prevent invasion of germs and reduce the rotting rate of fruits, biological preservation substances are odorless, non-toxic and harmless, the bitter gourds are still fresh as before after being stored for two months at the normal temperature, the preservation time of the shelf can be prolonged by two months or above, and the preservative is convenient to use and has excellent market popularization prospects.