221 results about "Growth height" patented technology

The droplet ejecting head includes heating elements each of which has a thermal energy applying surface which imparts energy to a viscous fluid with a viscosity of at least 20 mPa·sec so as to evolve a bubble, fluid supply channels each of which has the heating element on a wall and supplies the fluid toward the heating element and ejection nozzles through each of which the fluid is ejected as a droplet and each of which is in a position opposite the energy applying surface of the heating element across the supply channel. A distance between the energy applying surface and a foremost end of the ejection nozzle from which the droplet is ejected is in a range of from 2 μm to 8 μm or the distance is smaller than a growth height of the bubble that has evolved in the fluid by means of the heating element and which has been left to expand by itself until its internal pressure once exceeding one atmosphere decreases to a point below one atmosphere.

The invention relates to a plant system repairing method for composite polluted soil of chromium, zinc, lead and copper. According to the invention, Sedum alfredii H and Elsholtzia harchowensis are intercropped in the composite polluted soil of chromium, zinc, lead and copper, the root system of the Sedum alfredii H absorbs chromium, zinc and lead, the Elsholtzia harchowensis absorbs copper, and the Sedum alfredii H and the Elsholtzia harchowensis transport the pollutions to the overground part, the overground part is harvested and removed regularly or according to the growth height of the Sedum alfredii H and the Elsholtzia harchowensis, thereby removing a plurality of chromium, zinc, lead and copper from the soil, the biological normal position repair for the composite polluted soil of chromium, zinc, lead and copper can be implemented. The method is economic and convenient, and has no secondary pollution, and the invention can conserve both moisture and soil, and can beautify the environment.

The invention provides a phytoremediation method for managing composite cadmium-lead-arsenic contaminated soil. The method comprises the following steps: step S1: selecting a cadmium-enriched castor-oil plant variety; step S2: obtaining cadmium-lead-arsenic composite contaminated soil with neutral acidity and alkalinity; step S3: planting cadmium-enriched castor-oil plants and ciliate desert-grass in an intercropping manner in the cadmium-lead-arsenic composite contaminated soil with neutral acidity and alkalinity for surviving and growth, and harvesting matured castor-oil plants at regular intervals, and carrying out step S5; step S4: harvesting the upper part of the ciliate desert-grass according to the growth height of the ciliate desert-grass, and carrying out the step S5; retaining stubble of the ciliate desert-grass on the soil surface, and carrying out the step S3; step S5: feeding the harvested and matured castor-oil plants and ciliate desert-grass to an exclusive place for concentration and carrying out innocent treatment. The invention further provides a phytoremediation method for managing cadmium contaminated soil. The phytoremediation method is suitable for managing and repairing cadmium-lead-arsenic moderately and slightly contaminated soil, and has good practical application prospect.

The invention discloses a method for monitoring the growing state of forest trees based on an unmanned aerial vehicle. The method for monitoring the growing state of the forest trees is realized through the growing height of forest trees. The major method comprises that the unmanned aerial vehicle flies at a specific height, fixed-point measurement and photographing are carried out through a distance measuring instrument and an imaging device which are carried by the unmanned aerial vehicle, and analysis is carried out through a computer so as to acquire the growing state of the forest trees. The method disclosed by the invention combines an unmanned aerial vehicle remote sensing system and modern forestry detection technologies in allusion to large-scale integration forest farms, and farmers are not required to go to the field to observe growing conditions of the forest trees, thereby saving a lot of labor cost and time. Meanwhile, image data recorded by a computer facilitates people to check at any time and carry out before-and-after comparison, thereby analyzing the actual growing conditions of the forest trees more accurately, and being convenient for carrying out uniform planning and management for large-scale forest farms.

The invention discloses a real-time monitoring method for growth characters of tea trees in intensive cultivation. The method comprises the following steps: performing real-time data acquisition by a tea tree living body growth character data acquisition device based on online location, transmitting the acquired data to an artificial comprehensive management center through a wireless communication way to process, wherein the acquired data comprises current location data acquired by a locating mechanism, fresh tea leaves spectrum data acquired by a high spectrum imaging sensor, and average growth height of fresh tea leaves measured by an ultrasonic wave sensor, and judging the best fresh tea leaf picking time based on that the data and a picking judgment model established off line are combined by the artificial comprehensive management center. The picking judgment model comprises a bud size growth measurement model based on average growth height, a yield correlation model and a quality correlation model based on the high spectrum image data. The real-time monitoring method for the growth characters of the tea trees in intensive cultivation is beneficial to realizing of intensive cultivation and automation in planting of the tea trees.

The invention relates to a biological in-situ repairing method for copper pollution soil. It plants Haizhou elscholtzia to use their root systems to largely absorb copper-lead pollutants in the soil and transport upward and transfer to parts on the ground, regularly or according to the growth height, reaping and moving away the parts on the ground so as to carry away a large amount of copper, implementing the biological in-situ repair of copper pollution soil. It is economic, simple and convenient, no-secondary pollution and able to green and beautify environment.

The invention discloses a plant restoring method of lead polluted soil, which comprises the following steps: planting butterflybush flower in the soil polluted by lead through direct transplanting or sowing pattern, controlling the soil acidity at neutral or acidness, harvesting periodically or according to lead content or growing height, remaining certain segment of sprout, disposing the harvested material at special place.

The invention discloses a segmental observation system for the growth height of a top-board water guiding fissure zone. The segmental observation system comprises a detection system, a plugging system and a supply determination system, the detection system comprises a test probe, the test probe is formed by connecting detection units successively, the adjacent detection units are detachably connected via a slot joint, each detection unit comprises a water inlet pipe, a water return pipe, a pressure regulator valve and an electronic flow meter, the two ends of the water inlet pipe and the two ends of the water return pipe of the detection unit in the middle / tail portion are clamped on the slot joints respectively, one end of the water inlet pipe and one end of the water return pipe of the detection unit in the front portion is connected to the slot joint, the other end of the water inlet pipe and the end of the water return pipe of the detection unit in the front portion is connected to a U-shaped pipeline, and the water current pressure in each detection unit is kept equivalent. The test probe is provided with multiple units, the pressure regulator value is used to regular the pressure, it is ensured that the pressure of each detection unit is kept equivalent, and bores can be measured synchronously due to existence of the detection units.

The invention discloses a planting method of relieving continuous cropping obstacles and controlling pest and disease damage through intercropping of different hot pepper species, and belongs to the technical field of agricultural planting. According to the method, the intercropping of hot pepper with different growth height, disease resistance and pest resistance is carried out; the selected pepper species have the growth height differences, and the sequential cyclic intercropping is carried out according to the growth heights of the hot pepper; the ridge width of a land piece is 170cm, the furrow width is 30cm, and the depth is 25cm; six lines are arranged in each ridge, the line distance is 34cm, and the hole distance is 25 to 30cm; different species of hot pepper are intercropped on each ridge. The planting method has the advantages that the yield and the quality of the hot pepper are improved. The continuous cropping obstacles of the hot pepper can be effectively relieved through the intercropping culture of the hot pepper with different species, the continuous planting of the hot pepper throughout the year can be realized, the soil utilization rate is improved, and soil resources are saved. Meanwhile, the prevention and treatment effect of hot pepper epidemic diseases reaches 76 to 89 percent, the prevention and treatment effect on hot pepper helicoverpa assulta reaches 73 to 91 percent, the production quality safety of the hot pepper and the agricultural ecological environment safety are ensured, and the goals of efficiency increase, yield improvement and income increase are reached.

The invention discloses an early warning method of coal mining subsidence. The method is characterized in that the growth height of a water flowing fracture zone is judged according to the ultimate roof breaking interval of a key stratum and soft rock and the growth condition of the height, which grows along with the increasing of working face advancing distance, of a free space on the lower portion of the key stratum and soft rock, the possibility of the coal mining subsidence is evaluated by the height of the water flowing fracture zone, the height of the water flowing fracture zone continuously grows along with the increasing of the working face advancing distance, and an early warning is given out when the height of the water flowing fracture zone approaches a critical height, and coal mining subsidence will occur if the working face distance further increases, or else a coal mine is safe. The early warning method of coal mining subsidence has the advantages that underground water is prevented from fast seeping into a goaf area or deep rock along mining cracks, underground water level lowering is prevented, downhole water burst or mine flooding is prevented, precious coal resources can be produced to the maximum extent, and coal mining safety is guaranteed effectively.

The invention provides a process for epitaxial growth of silicon in a three-dimensional (3D) NAND flash structure. The method comprises the steps of depositing a substrate lamination structure; etching the substrate lamination structure to form a channel and a silicon groove in a substrate surface; cleaning the channel and the silicon groove; performing high-temperature annealing; forming epitaxial growth of the silicon, and cleaning the silicon in advance; and performing epitaxial growth of the silicon. By high-temperature annealing, the surface of the silicon groove damaged by etching is oxidized, so that resided polymer in the silicon groove in the bottom of the channel is eliminated, meanwhile, a certain oxidization repair effect also can be generated on the surface, which is damaged,of the silicon subsequently and epitaxially grown, and interface damage and lattice defect are eliminated; the step of wet cleaning is added before high-temperature annealing, the subsequent and better effects of oxidization annealing and interface repair can be obtained; and by the process, the deep channel can be effectively etched, oxide residue is prevented, damage to an interface layer by etching is prevented, so that the epitaxial growth height uniformity of the silicon is improved, an epitaxial growth gap of the silicon is prevented, and the comprehensive performance of a 3D NAND flashis improved.

The invention discloses a self-propelled tea picking device which mainly comprises a walking transmission system, a tea picking and trimming mechanism transmission system, a tea picking workbench ascending and descending system, a tea leaf collecting system and a tea leaf picking system. The tea picking and trimming mechanism transmission system is used for realizing non-selective picking of bulk tea leaves, the tea leaves are conveyed into a collecting bag through the air blowing of a centrifugal fan; the walking transmission system achieves the functions of straight walking, turning and speed changing of the tea picking device through gear shifting of a gear shifting fork of a gearbox; in the tea picking workbench ascending and descending system, mainly a hydraulic motor rotates to drive a steel wire rope to hang up the tea picking workbench, and the forward and reverse rotation of the hydraulic motor can be adjusted according to the growth height of the tea tree, so as to control the tea picking workbench to ascend and descend; after the tea picking is finished and when unloading of the tea leaves is needed, inclination of a tea unloading plate can be controlled through telescoping of the hydraulic cylinder to complete unloading of the tea leaves; the tea leaf picking system adopts a cross sliding table to control a tea leaf picking manipulator to accurately pick up the tea leaves. The device has extremely high tea picking efficiency, greatly reduces labor intensity and saves cost.

The invention discloses a rapid self-forming method of a vallisneria natans underwater meadow, relating to a large-area and large-scale water environment biological treatment technique. The method comprises the steps of: (1) collecting fertile lake mud, clay and degradable fibres; (2) preparing a vallisneria natans culture substrate according a volume ratio of the lake mud, the clay to the degradable fibres of 40: 40: 20 and filling the culture substrate in a detachable mould which is 60 cm in length, 30 cm in width and 8 cm in height; (3) putting the mould in a cement pond which is good in illumination conditions and has adjustable water level; (4) collecting healthy and strong winter buds of the vallisneria natans and sowing the buds in the culture substrate; and (5) adjusting the waterlevel in the cement pond duly according to growth height of the vallisneria natans so that the vallisneria natans can grow rapidly and thereby are branched and combined to form the meadow. The rapid self-forming method of the vallisneria natans underwater meadow disclosed by the invention can produce plenty of vallisneria natans meadows in a large scale, is convenient for implementation and construction, and can rapidly and efficiently recover submerged plants in a nutrient-rich shallow lake so that a foundation for further optimizing aquatic plant community is provided, thereby aquatic ecosystem structure is improved and ecological system stabilization is promoted.

The invention relates to the technical field of afforestation, in particular to a stump reserving bud afforestation method for cutting a poplar industry raw material forest. The stump reserving bud afforestation method comprises a first step of cutting poplars in the poplar industry raw material forest before sap flows in spring, reserving stumps, and enabling the tops of the stumps to be higher than the ground; a second step of enabling the soil to be covered on the stumps, and enabling the thickness of the covering soil to be higher than the tops of the stumps; a third step of instantly irrigating the poplar industry raw material forest where the soil is covered; a fourth step of performing intertillage on the poplar industry raw material forest undergoing natural reforestation; and a fifth step of enabling the growth height of buds of the stumps to be 8cm to 10cm. According to the stump reserving bud afforestation method, the complex afforestation process of digging original stumps, flattening land, digging planting holes, purchasing seedlings and planting is not required, the afforestation cost is reduced, the tree nutrition absorption area is large by reserving huge root systems of the original trees, growth of the trees is accelerated after the renewed trees grow normally, the cutting cycle is shortened simultaneously, and production benefit is greatly improved.

The invention relates to a simple, convenient and safety overwintering cultivation method of figs. The method includes the steps: performing soil preparation, soil improvement and field planting; pruning; applying fertilizers; performing irrigation and the like. A cultivation frame is a 'T'-shaped hedge frame and is high in early yield and beneficial to ventilation of plants, fruits can be sufficiently irradiated by sunlight, and produced fruits are high in sugar degree, fine in coloring, thick in fruit powder and fine in quality. The growth heights and the fruit setting positions of the plants can be controlled by a pruning mode, planting density is increased, the proper number of branches and proper pruning length are determined, the plants are conveniently managed and do not easily suffer from wind chill, and mechanical operation can be performed. By the aid of the technology, the pruning technology of traditional fig production is simplified, the difficulty in pruning, picking and cold protection is overcome, so that planting area is enlarged, and work and labor are saved.

A method which utilizes grafting of wild aubergines to prevent verticillium wilt of aubergines is applied to producing aubergines in protected grounds or outdoors in our country. The invention provides the method which utilizes wild aubergines with the name of super-support and cultivating aubergines grafting. The invention adopts the proposals that firstly, parental stocks and grafts are selected, which adopt wild aubergines with the name of super-support as parental stocks, the seeds of the wild aubergines are small and yellow-white, and the thousand seed weight is 1g, the natural growing height reaches 2m to 2.5m, the thicknesses of stems reach 10cm to 20cm, the diameters of fruits are 1-2cm, the color of peels is white-green in patterns. Grafting assortments are green aubergines, secondly, the grafting method is that parental stocks wild aubergines with the name of super-support are firstly sowed, during the period when two sheets of cotyledons are flattened, grafts are further sowed, when wild aubergines grow 5-7 sheets of true leaves, the wild aubergines are grafted by adopting the cleft grafting method, 2-3 sheets of true leaves are reserved beneath the parental stocks, 2-3 sheets of true leaves are reserved above grafting seedlings, the depth of notches is about 1.0-1.5cm, the healing temperature is 25-26 degrees in the daytime and 20-22 degrees in the night, and the humidity of the air is more than 95%.

The invention discloses a planting method for controlling the infection of the citrus tristeza virus on newly-grown citrus seedlings. The planting method includes the steps that terrestrial citrus seedlings are loaded with a nutrition pot filled with nutrition soil or field soil, then the nutrition pot loaded with the terrestrial citrus seedlings is put into a greenhouse to be cultivated in a centralized mode or centralized in farmland to be cultivated, a black mulching film or a light reflecting mulching film is used for covering the ground of the farmland, the farmland is relatively independent, and citrus planting does not exist in the far peripheral range; the young shoot emerging time, the shoot emerging amount and the young shoot growing height of each batch are recorded; the pest and disease damage occurrence on the citrus seedlings is regularly detected, spraying preventing and controlling are conducted purposefully, a diaphorina citri killing pesticide is sprayed in the shoot stage, meanwhile, pests such as aphids and leaf miners are controlled, and disease preventing and controlling are conducted according to a conventional method; the tristeza virus is detected every year, and if trees infected with the tristeza virus are found, the tristeza virus infected with the tristeza virus are removed immediately; the citrus seedlings are fixedly planted into a field after two years. The planting method can effectively lower the risk of infecting the citrus tristeza virus and even eliminate the citrus tristeza virus.

An efficient planting method for pitaya particularly includes the following steps that a reinforced concrete column independent type adjustable supporting frame is manufactured; reinforced concrete columns are buried in soil side by side along pitaya planting ridges; every two adjacent reinforced concrete columns are connected through an iron wire, drooping iron wires are arranged on the iron wires at two sides, the pitaya grows along the iron wires and finally is hung on the connecting iron wires between the reinforced concrete columns, and the height of the iron wires can be adjusted through adjustable angle iron according to the growth height of the pitaya; finally, 15-16 pitaya seedlings are planted around and between the reinforced concrete columns, and water and fertilizer management and pest control are carried out according to common methods. By means of the efficient planting method for pitaya, a large planting density is realized, about 1600 seedlings can be planted per mu, and 1400 more seedlings are planted compared with a traditional method. Pitaya is a long-life plant, can survive for decades or even hundreds of years, that is, the cost of 1400 more seedlings is invested, but the yield is four times higher than that of the traditional method.

The invention relates to a locally improving method for copper-lead compound pollution soil, planting purple flower elscholtzia to use their root systems to largely absorb copper-lead pollutants in the soil and transport upward and transfer to parts on the ground, regularly or according to the growth height, reaping and moving away the parts on the ground so as to carry away a large amount of copper-lead pollutants, implementing the local improvement. It has small investment, simple method, no secondary pollution and can conserve water and soil, solidify soil and beautify environment.

The invention discloses a method for grafting a long-branch scion of a tree. Aiming at the conditions that the short-branch scion method for conventional in-vitro grafting of a grown tree has the defects that the survival rate is lower, the scion is not easy to sprout and the growth vigor is poor, the method disclosed by the invention can be used for grafting by adopting the long-branch scion of 10-20cm during the grafting and patching of the grown tress. Since the long-branch scion has abundant stored nutrients, fewer nutrients are lost and the possibility of causing death is lower during grafting under the sealing condition. Meanwhile, according to the method, a back interface at the lower end of the long-branch scion clings to the lower part of a lateral bud during grafting; and a combined mode of stock scion by combining the internal, the external and the periphery is adopted, so that the grafting survival rate can reach as high as 80-91 percent which is improved by 30-51 percent than the contrast rate. In addition, a new plant has favorable vigor and growth height improved by 31-61 percent than that of a contrast plant. The technology disclosed by the invention is suitable for intraspecific allied grafting as well as grafting and patching of fruit tree varieties and landscape tree varieties and has remarkable economic benefits.

The invention discloses a horizontally-movable and vertical lifting type high-throughput measuring system and a horizontally-movable and vertical lifting type high-throughput measuring method for plant phenotypes. The system comprises an automatic mechanical device capable of horizontally moving and vertically lifting, an ultrasonic meter, an RGB camera, a spectrometer, an NDVI sensor and a Beidoulocator which are integrally arranged on an anti-shake cloud deck, a distance measuring sensor, a data processing and transmitting module and a server, wherein the ultrasonic meter, the RGB camera, the spectrometer, the NDVI sensor and the Beidou locator are arranged on the anti-shake cloud deck and are respectively connected with the data processing and transmitting module; the data processing and transmitting module is connected with the server through optical fibers. According to the horizontally-movable and vertical lifting type high-throughput measuring system and the horizontally-movable and vertical lifting type high-throughput measuring method disclosed by the invention, growth height of crops, a visible light image, a multispectral image, a vegetation difference index and growthgeographic location information can be synchronously acquired in real time and acquired data is transmitted by the optical fibers; multisource phenotypic features of plants at all growth periods are synchronously measured at high throughput; meanwhile, measurement strength is also reduced and measurement accuracy and efficiency are improved.

The invention discloses a hickory grafting method, which uses American thin-shelled hickory as a rootstock, adopts a cutting grafting method, the scion length is 5cm-6cm, and there is one strong bud, and the ear stem of 1-1.5cm is reserved at the upper end of the bud. Ear cutting and anvil cutting should be accurate and fast, the cutting surface should be smooth, and the bud body should not be damaged when cutting the ear, and should be tightly bound with a film in time, especially the upper end of the scion should be tightly wrapped so that only the bud body is exposed; Lightly cut a long straight face to increase the contact surface between the scion and the rootstock. The rootstock selected by the present invention has strong growth potential, well-developed root system, strong adaptability, small pith core, and strong affinity with hickory nuts. The rate, seedling rate and growth potential make the pecan grafting survival rate reach more than 95%, and the seedling rate reach more than 90%.

A corridor tree span design method of electric transmission line comprises steps as follows: cutting down 3-5 analysis trees in the wood in which a high voltage line is to be erected, after every tree is cut down, sectionally cutting out round discs according to length of 2 m, counting the annual rings of every round disc, measuring the diameter of every annual ring, drawing a stem analysis cross-section diagram, taking the Richards model as a prediction model, fitting by a correction index model at the same time, obtaining the theoretical values of the annual growth amount of the trees, predicting the future growth amount according to a regression curve, calculating the tree height prediction values and tree height growth limit values of different ages according to the future growth amount, carrying out optimized type selection design to overhead line structures according to estimated natural maximum growth height of the trees. The invention is advantaged by accurately predicting the height of the corridor trees, rationally designing the height of the overhead line structures, realizing erecting over the trees, finally ensuring safe operation of the power line, reducing construction cost, avoiding cutting the trees in large area and protecting the ecological environment and the forest cover.

The invention provides a plant monitoring method. The method comprises the steps that the vertical distance H2 between an unmanned aerial vehicle and the ground is detected by a millimeter-wave radaror a microwave radar on the unmanned aerial vehicle; an infrared ranging device arranged on the unmanned aerial vehicle detects the vertical distance H1 between the unmanned aerial vehicle and the tipof a plant; the growth height H of the plant is calculated according to the vertical distance H2 and the vertical distance H1; and an image sensor arranged on the unmanned aerial vehicle acquires thespectrum and / or reflectivity and / or color coordinate information of the plant. According to a plant monitoring device, the infrared ranging device is arranged below the unmanned aerial vehicle to detect the vertical distance between the plant and the unmanned aerial vehicle; the image sensor is arranged below the unmanned aerial vehicle to detect the spectrum information of the plant; the millimeter-wave radar or the microwave radar is arranged below the unmanned aerial vehicle to detect the vertical distance between the ground and the unmanned aerial vehicle; and the infrared ranging deviceis provided with an area array photoelectric sensor and an LED light source. According to the method and the device, multiple sensors are arranged, and the plant can be comprehensively monitored.

The invention provides a plant growth regulator and a preparation method and application thereof as well as a prevention and control method for tree obstacles of a power grid line gallery, and relatesto the technical field of plant growth regulators. The plant growth regulator is prepared by compounding uniconazole, paclobutrazol, chlormequat, maleic hydrazide, choline chloride, chitosan, ethephon, mepiquat chloride, 6-benzylaminopurine, brassinolide and diethylaminoethyl hexanoate, so that the aims of changing a high-coarse growth conversion relation of plants in various angles, acceleratingthe ripening and ageing of the plants and comprehensively realizing regulation and control of the plants are realized. According to the prevention and control method for the tree obstacles of the power grid line gallery, the plant growth regulator is applied and the growth height of gallery trees is reduced so that the aim of preventing and controlling the tree obstacles of the power grid line gallery is realized. According to the method provided by the invention, the problem in the prior art that a method for effectively controlling the growth of the trees on an overhead power transmission line gallery is lacked is alleviated, and the aims that an ecological landscape and benefits of forest farmers are not damaged and tree obstacle threats are not caused are realized.

The invention discloses a plant cultivation box. The plant cultivation box comprises a box body, a planting plate weighing module, a nutrient solution circulation and root drying module, a light plateheight automatic adjustment mechanism, an alarm module, a display module and a main controller; a nutrient solution in circular flow state and function of root drying are achieved through the nutrient solution circulation and root drying module; the weight of plant is detected at regular intervals through the planting plate weighing module, the weight of the plant is displayed through the displaymodule and when the increase amount of the weight of the plant is less than a preset value within a set time interval, the main controller judges that the plant growth is unhealthy and sends an alarmsignal to the alarm module; the plate height automatic adjustment mechanism is combined with a weight function of the planting plate weighing module, and the height of the light plate is adjusted according to weight data detected by the planting plate weighing module, so that the height of the light plate is matched with the growth height of the plant.

The invention provides a corylus heterophylla Fisch.*corylus avellanaL. seedling cultivation method. The method comprises the steps that female parent tree field planting, leaf fertilizer applying and layering seedling cultivating are carried out, according to leaf fertilizer applying, when the growth height of green branches of root shoots reaches 25 cm, leaf fertilizer is irrigated in a dripped mode, the adopted amount is 5 L / mu, and spraying is carried out once every two weeks. According to the seedling cultivation method, the layering rooting rate is 99.3%, the survival rate is 99.8%, and time for seedling cultivation is shortened by 10 days; cultivated hazelnut seedlings are first-class seedlings, the seedling height is 85 cm, the ground diameter is 0.85 cm, the number of lignified side roots is 10, and the length is 25 cm; when the cultivated hazelnut seedlings grow into two-year-old trees, the freeze-resistant ability is high, and the trees can resist low temperature of 37 DEG C below zero during the dormancy period; after the cultivated corylus heterophylla Fisch.*corylus avellanaL. seedlings are planted, the fruit yield is large, the average single fruit weight reaches 2.8 g, shells are thin, the kernel percent is 45%, the average single-plant yield of the trees of 5-6 years old is 2.5 kg, and fruits are borne 10 days earlier.

The invention discloses a water spinach facility cultivating method which aims to treat facility soil salinization. The water spinach facility cultivating method comprises the steps that in a facility such as a conservatory or a greenhouse in which arid crops are conventionally planted and salinization problems occur due to excessive fertilizer application, ridges are built on the periphery of the facility, the inner sides of the ridges are lined with plastic films to prevent moisture side leakage, beds with the width of 1.2 m to 1.5 m are built inside the facility, the depths of furrows range from 20 cm to 30 cm, and high-density direct seeding or high-density seedling transplantation of water spinach (a variety which is a water spinach type, grows vertically and has narrow leaves) is performed on the bed faces. Irrigation is performed according to the growth height of the plants and according to the limit that the plants needing growing are not flooded, water can also be retained in the furrows to keep the bed faces to be sufficiently wetted, and irrigation is performed again if the surface soil of the bed faces becomes white. Surface water or well water with low hardness is used for the irrigation water. Cut harvesting is performed with 5-8 cm stubble in an earlier stage harvesting process, and possible stolons growing transversely are removed in time so that disturbance to the population can be avoided; when the population tends to closing in a later stage, the density of the population is controlled through the height of the stubble and the depth of water flooding.

The invention discloses an observation device for growth height of plants in a sample area and an observation method. The observation device comprises an instrument support, a stepper motor, a laser ranging mechanism, an anti-interference assembly and a gradienter, wherein the instrument support comprises a square top frame and four support legs arranged at the lower end of the square top frame, aleft Y-axis guide rail and a right Y-axis guide rail are arranged on the lower surface of the square top frame and connected with an X-axis support through two sliders, and an X-axis guide rail is arranged on the X-axis support; the laser ranging mechanism comprises an infrared laser range finder and a connecting frame, a rack is arranged at the lower end of the X-axis support, a gear mutually meshed with the rack is arranged on the connecting frame, and the connecting frame is glidingly connected onto the X-axis guide rail through the gear and the rack. The observation device has the advantages of being simple, easy and concise to operate, realizing accurate monitoring result and small errors, facilitating compared tracking and the like, and can perform directional observation on different kinds of vegetation in the selected area.

The invention discloses a melia azedarach seed seedling culture device. The device comprises a base, wherein a seedling culture box is arranged above the base, an opening is formed in the top of the seedling culture box, fixed columns are fixedly mounted on two sides of the seedling culture box, thread grooves are formed in the bottoms of the two fixed columns, threaded columns are mounted in thetwo thread grooves in a threaded manner, the bottom ends of the threaded columns extend out of the thread grooves, a cavity is formed in the base, and two bearing seats are fixedly mounted on the inner wall of the bottom of the cavity body. The melia azedarach seed seedling culture device is reasonable in design and good in practicability, can carry out water sprinkling and fertilization work on melia azedarach seeds or melia azedarach seedlings in the seedling culture box at a constant speed and constant quantity, improves quality and efficiency of water sprinkling and fertilization for the melia azedarach seeds or melia azedarach seedlings and is more beneficial to germination and growth of the melia azedarach seeds or melia azedarach seedlings, and besides, the melia azedarach seed seedling culture device can adjust the height position of the seedling culture box, provides sufficient growth space according to different growing heights of the melia azedarach seedlings and contributesto vigorous growth of the melia azedarach seedlings.