54 results about "Viticulture" patented technology

According to the root zone limiting type grape rain-sheltering cultivation system and method based on agriculture and light complementation, existing photovoltaic panels, prefabricated steel frames and prefabricated cement piles in a photovoltaic field are used as infrastructures, rainwater is collected and drained by installing gutters and drainage pipelines, and water accumulation is avoided; a transparent polyethylene film is installed between two adjacent rows of prefabricated steel frames to serve as a rain sheltering film, and meanwhile a reflective film is laid in a gap area of the photovoltaic panels to achieve the effects of light supplement and disease and pest prevention. Grape root systems are limited in container systems composed of plastic outer packaging bags and nutrient soil, and the container systems are arranged above the reflective film at equal intervals. A grape shed frame is constructed through the transverse pulling frame wires and the stand columns to support grape vines to grow; the rain sheltering film is fixed through a clamping spring and a clamping groove and is provided with a drainage hole connected with a drainage pipe; the high-quality and high-efficiency grape cultivation scheme is adopted, the leisure and sightseeing functions are considered, land resources under the photovoltaic panel are effectively utilized, the contradiction between grape rain-sheltering cultivation and illumination requirements in an agriculture and light complementary mode is solved, and the utilization efficiency of land and light resources is improved.

The invention relates to the technical field of precision agriculture and grape cultivation, and discloses a vineyard fertilization method based on unmanned aerial vehicle multi-source remote sensing data, and the method comprises the steps: obtaining a canopy multi-spectral image and three-dimensional structure data through an unmanned aerial vehicle; carrying out image preprocessing and finely extracting a grape canopy region; fusing the extracted spectral vegetation index, texture features and three-dimensional structure features, and constructing a multi-source feature vector; constructing and optimizing a nitrogen nutrition inversion model through a machine learning algorithm by utilizing actually measured nitrogen nutrition parameters; generating a nitrogen content distribution diagram based on a model inversion result, calculating the nitrogen deficiency amount and the recommended dressing pure nitrogen amount of each space unit in combination with critical nitrogen concentration diagnosis and target yield, and converting the nitrogen deficiency amount and the recommended dressing pure nitrogen amount into the use amount of a foliage spraying working solution; and generating a variable fertilization prescription map, and converting the variable fertilization prescription map into a nozzle flow control instruction executable by the unmanned aerial vehicle to realize on-demand accurate variable fertilization. According to the invention, closed-loop management from nitrogen nutrition monitoring to variable rate fertilization is realized, and the nitrogen fertilizer utilization efficiency and the fertilization accuracy are improved.

The invention relates to a vineyard water-saving irrigation system, a construction method thereof and a grape planting irrigation method. The problems that in the northwest region, precipitation is small, water evaporation is fast in the grape cultivation management process, and water resources are wasted due to overground drip irrigation are solved. According to the technical scheme, the device comprises collection boxes buried underground on the two sides of a cultivation row, and a water conveying pipeline and a rainwater pipeline are arranged in the collection boxes; when the vineyard is built, deep ditches are dug in the two sides of a cultivation row respectively, the irrigation systems are placed in the deep ditches, the two irrigation systems incline towards the inner side of the cultivation row to form a splayed shape, and then soil covering is conducted; grape seedlings are planted in cultivation rows, water is provided for the grape seedlings planted on the two sides of the cultivation rows through a water conveying pipeline and a rainwater pipeline, and rainwater can be collected or tap water can be adopted for irrigation.

The invention relates to the technical field of plant genetic engineering. The invention provides a beta-ketoester acyl-CoA reductase KCR gene, wherein the nucleotide sequence of the KCR gene is as shown in SEQ ID NO. 1. The invention also provides a recombinant vector. The invention also provides a recombinant bacterium. The invention also provides an application of the KCR gene, the recombinant vector or the recombinant bacterium in improving the salt tolerance of plants. The invention also provides application of the KCR gene, the recombinant vector or the recombinant bacterium in plant salt tolerance genetic improvement. The invention further provides a method for obtaining the salt-tolerant plant. After the KCR gene is over-expressed in the grape callus, the salt tolerance of the obtained transgenic grape callus is obviously improved. And after the gene is over-expressed in arabidopsis thaliana, the obtained transgenic arabidopsis thaliana epidermis wax is accumulated and the salt tolerance is obviously increased, so that a new gene resource can be provided for salt tolerance improvement and germplasm resource breeding of a grape cultivation variety.

To provide a breeding device and method for sea grapes, which can reduce an installation area, have a compact structure and large yield, and enhanced breeding efficiency.SOLUTION: A breeding device 1 for sea grapes breeds sea grapes in a vertical direction, by arranging multiple net racks R on which seedling of sea grapes are planted in a breeding water tank 11, circulating and filtering sea water for breeding the sea grapes on each rack R, the device comprises: one or more breeding water tanks 11 whose upper end is open, formed of a light transmissive material, and formed in a bottomed and vertically long cylindrical shape; a bottomed and vertically long cylindrical filtration water tank 12 for circulating sea water to the filtration filter 13 disposed inside, for filtering the sea water; a lower pipe line 14 which flows the sea water from the bottom of the breeding water tanks 11 for making the sea water flow into a lower part of the filtration water tank 12 by a circulation pump 14a; and an upper pipe line 15 for making the sea water overflowing from the upper part of the filtration water tank 12 flow into the upper part of the breeding water tank 11, where, the multiple net racks R on which seedlings are planted, are connected in a vertical row by a suspension string S, so that bottom faces of the net racks are horizontally arranged, and in the state, the net racks R are suspended from an upper part of the breeding water tank 11 to inside.SELECTED DRAWING: Figure 1

The invention discloses a high-value utilization method of grape young fruit thinning and removing waste, and relates to the technical field of grape and wine industry byproduct processing. The invention provides a high-value utilization method of grape young fruit thinning waste, aiming at the problem that high-value-added utilization is difficult to realize due to the fact that thinned young fruits generated in the grape cultivation and management process are abandoned in an orchard. According to the method, three products with remarkable economic values, namely an acid increasing agent, a grape young fruit polyphenol extract and an animal feed, are successfully produced by carrying out comprehensive processing and resource utilization on grape young fruits which are thinned and removed. The application of the method not only solves the problem of environmental pressure caused by random discarding of thinned young fruits, but also realizes efficient conversion and cyclic utilization of agricultural wastes, and brings a new economic growth point for the grape planting industry.

This invention belongs to the field of grape cultivation technology, specifically relating to a fruit enlargement agent for Daqing grapes, its preparation method, and its application. The fruit enlargement agent for Daqing grapes is prepared from an aqueous solution of gibberellin, thiabendazole, and brassinolide. Specifically, the concentration of gibberellin in the fruit enlargement agent is 20 mg / L~25 mg / L, the concentration of thiabendazole is 1.0 mg / L~1.25 mg / L, and the concentration of brassinolide is 0.025 μg / L~0.050 μg / L. The fruit enlargement agent of this invention, combined with fruit thinning treatment, can increase the weight of a single Daqing grape berry by at least 20% while retaining the soluble solids content of the grape.

The utility model discloses a drip irrigation device for grape cultivation management, which belongs to the technical field of grape cultivation and comprises a water supply pipe for supplying water to the drip irrigation device, water supply joints are uniformly arranged on the outer side of the water supply pipe, and a flow control valve is mounted at the water outlet end of each water supply joint in a threaded manner. A three-way connector is installed at the end, away from the water supply connector, of the flow control valve through threads. According to the drip irrigation device, the arc-shaped water pipe is arranged on the outer side of a grape seedling in a sleeving mode, then the arc-shaped water pipe is stably connected with the flow control valve through the three-way connector and the connecting mechanism, the flow control valve controls the amount of water entering the arc-shaped water pipe, and then the drip irrigation amount of the drip irrigation device on the grape seedling is accurately adjusted; and a plurality of groups of drip irrigation mechanisms on the arc-shaped water pipe are matched, so that the drip irrigation device can stably carry out drip irrigation on a circle of soil around the root of the grape seedling, and then the root in the soil around the grape seedling can stably absorb water.

The invention relates to the technical field of grape cultivation, in particular to a method for delaying vitis heyneana germination, which comprises the following steps: in the first ten-day period of March, spraying a treating agent on vitis heyneana, and the treating agent comprises the following components: maleic hydrazide, ethephon, paclobutrazol, morning glory extract and tobacco extract. The method is easy to operate, low in cost, green and safe, germination of vitis quinquangularis is delayed by spraying the pesticide, high-incidence time of downy mildew is avoided in the florescence of the vitis quinquangularis, and meanwhile the growth quality of the vitis quinquangularis is effectively improved.

The invention concerns a method for prophylaxis of infections by fungi, particularly by oomycetes, and of bacterial infections in crop and ornamental plants. Areas of application are vine, fruit, vegetable and ornamental plant growing. The method of the invention is characterized in that an aqueous solution of a protease, alone or in combination with β-glucanases and / or chitinases, is prepared, stabilizers, stickers and wetters are added, and the additized solution is applied by conventional techniques to the plants a number of times within the vegetation period, preferably ahead of weather-related phases of high infection threat.

The utility model discloses a cold shed grape cold -resistant cultivation support relates to grape cultivation field, including bottom plate, the bottom plate is detachably installed with connecting plate through bolt connecting piece, one side of connecting plate is rotatably connected with inclined bracing piece, the end rotatably connected with crossbeam of inclined bracing piece, the middle rotatably connected with ground support rod of inclined bracing piece. Through the inclined bracing piece is inclined, and the ground support rod is rotated and is inclined to make the soil breaking cone to be inserted into the ground, the inclined bracing piece, the ground support rod and the ground are triangle stable support between this time, again overturn crossbeam to with the ground horizontal state, and are fixed through the plug -in component, finally can when the grapevine is fixed on the inclined bracing piece through the ribbon when the grapevine on the inclined bracing piece grows the fruit, the grapevine forms certain angle with the ground, and the fruit is naturally drooping under the action of gravity, forms the three -dimensional cultivation mode of staggered, avoids the mutual superposition shading, has improved the yield of grape.

The invention relates to the technical field of grape cultivation, in particular to a method for delaying maturity of wine grapes, which comprises the following steps: pruning the grapes in the grape coloring completion period; the pruning comprises the step of removing 1 / 4-1 / 3 of young sprouts at the tops of grape leaf curtains. Experiments show that the method can effectively delay the ripening process of the wine grapes, can delay the harvesting time of the grapes by 6-11 days, and does not affect the yield of a vineyard and the quality of the wine grapes. The method is simple and convenient to operate, is verified by repeated field tests for many years, has relatively high reproducibility, can be used for solving the problem of too fast maturity in western producing areas in China, and is an effective method for delaying grape maturity.

The utility model discloses a supporting device for viticulture, which comprises a base plate, a lifting bottom rod is arranged on the upper portion of the base plate, a lifting top rod is telescopically connected to the upper portion of the lifting bottom rod, a hydraulic telescopic mechanism is arranged between the bottom of the lifting top rod and the inner bottom of the lifting bottom rod, and a turnover telescopic rod is arranged on the side portion of the lifting top rod. The turnover telescopic rod is rotationally connected with the side part of the lifting ejector rod through a rotating support; by arranging the lifting bottom rod and the lifting top rod, the height of the supporting device can be adjusted; by arranging the turnover telescopic rod, a certain turnover supporting rod can be turned over to the horizontal position according to needs and fixed through the movable supporting block, and meanwhile the turnover telescopic rod can be stretched or shortened according to needs and is convenient to adjust; in addition, the device can be conveniently fixed to the ground through the adjustable supporting leg mechanism, and stability is improved.

The utility model belongs to the technical field of grape cultivation, particularly relates to a retractable cultivation net for grape cultivation, and aims to solve the problem that an existing cultivation net is easy to loosen, and adopts the following scheme that the retractable cultivation net comprises an operation shell, and an adjusting mechanism is arranged on one side of the interior of the operation shell; the adjusting mechanism comprises a motor, the motor is embedded in one end of the operation shell, the power output end of the motor is connected with a driving rod, and the end, penetrating into the outer wall of the operation shell, of the driving rod is connected with a worm. By means of supporting of the supporting rods and the sleeve blocks, the stability of the sliding block in the sliding process is improved, the deviation condition is avoided, by adjusting the distance between the sliding block and the operation shell, the telescopic block slides under limiting of the fixing shell, the cultivation net is driven to be subjected to shrinkage adjustment, adjustment is conducted according to the use condition, and the loosening and falling condition is avoided.

The invention provides an electric contraction device and method for grape rain-sheltering cultivation, and relates to the field of agricultural facility engineering, and the electric contraction device comprises two stand columns which are vertically arranged on the left side and the right side of a grape cultivation area respectively and used for supporting the whole device; the cross beam is horizontally connected to the top ends of the two stand columns to form a supporting frame; the first electric telescopic rod is fixedly mounted in the stand column; the folding and shrinking mechanism is mounted at the top end of the electric telescopic rod I; the rain sheltering film covers the outer side of the folding and retracting mechanism and can be unfolded or folded through the folding and retracting mechanism; a sensor system. Through cooperation of the sensor system and the execution mechanism, intelligent adjustment of the rain sheltering state is achieved, manual intervention is reduced, and the response speed is increased by 50% or above; rainwater is prevented from gathering on the surface of the film due to the non-drop characteristic of the EVA film, photosynthesis of grapes is guaranteed due to high light transmittance of the SG film, and the sugar degree and color of fruits are improved; the film thickness and reinforcing edge design prolongs the service life and reduces the replacement frequency.

The utility model discloses a water-saving irrigator for viticulture, which comprises a plurality of fixed vertical rods, two of the fixed vertical rods are longitudinally arranged, grape vine climbing frames are fixedly arranged on the inner end surfaces of the two fixed vertical rods, vertical guide rails are arranged at the outer ends of the fixed vertical rods, a support is longitudinally arranged between the two vertical guide rails in a crossing manner, and a plurality of water-saving irrigation devices are arranged on the support. A motor is arranged in one end of the support, a transmission assembly is arranged on an output shaft of the motor and comprises a first bevel gear and a second bevel gear, a linear screw is arranged in the center of the end face of the second bevel gear, and a movable clamping plate is movably arranged on the linear screw. A water storage box is fixedly arranged at the lower end of the movable clamping plate, a water outlet pipe is arranged at the lower end of the water storage box in a communicating mode, and a water collecting hopper is arranged on the vertical face of the outer end of the water storage box. According to the walking type irrigation device, walking type irrigation is achieved, current intensive irrigation is avoided, and the phenomenon that water is collected at the root of a grape tree is prevented.

This invention discloses a method for cultivating Kyoho grapes that mimics natural fruit, belonging to the field of grape cultivation technology. The method includes sequential procedures such as pre-flowering directional topping, precise pre-flowering bunch dipping pretreatment, initial fertilization during berry enlargement, secondary fertilization to enhance berry enlargement, and auxiliary shoot control. Through the synergistic regulation of directional nutrient intensive topping, two-stage gradient hormone compounding, and phased fertilization, it adapts to the physiological development rhythm of Kyoho grapes. This invention significantly improves the fruit set rate and reduces the fruit cracking rate of Kyoho grapes, ensuring that each fruit weighs 12-15g, the standard for marketable fruit. It also improves fruit firmness and storage and transport resistance, producing well-shaped, pure-tasting, mimicking natural fruit. This method is scientific, efficient, and easily scalable, effectively promoting the quality and efficiency improvement of the Kyoho grape industry.

The invention relates to a grape planting technology, and discloses a grape cultivation frame and a planting method thereof. The grape cultivation frame comprises at least four stand columns, and first cross beams and second cross beams are arranged at the upper ends of the stand columns; the first cross beam and the second cross beam are distributed in a crossed manner; an upper layer and a lower layer are formed; vertical guide ropes with adjustable positions are arranged on the first cross beam and the second cross beam; first guide ropes are stretched at two ends of the first cross beam, and second guide ropes are stretched at two ends of the second cross beam; a third guide rope is arranged on the second guide rope; and a fourth guide rope is arranged between the first guide rope and the second guide rope. The grape planting method comprises the following steps: S1, soil preparation; s2, setting up a grape cultivation frame; s3, field planting and young tree management; s4, shaping and pruning; s5, annual branch tip and flower and fruit management; s6, treatment in the dormancy period after leaf falling. According to the grape cultivation frame and the planting method thereof, installation is convenient, the yield can be increased, and meanwhile field management is facilitated.

The invention discloses a transformation and cultivation process for an old table grape garden in an extreme dry-hot area, and belongs to the technical field of grape cultivation, and the transformation and cultivation process for the old table grape garden in the extreme dry-hot area comprises the steps of frame shape transformation, tree body shaping, winter pruning, flower and fruit management, pest control, water and fertilizer management and the like. By means of frame shape transformation and tree body shaping, frame binding in spring is easier to operate, pruning can be directly carried out through a machine in summer, fertilization can be directly carried out under the frame surface through a fertilizer applicator, a ditcher and other machines in autumn, and tree body shaping has the advantages of being easy to get on and get off the frame, convenient to manage, high in photosynthetic efficiency and reasonable in leaf curtain distribution, and fruits are concentrated at the positions 1.8 m away from the two sides of a ditch. New tips are evenly distributed on the frame face, the lower portion is ventilated and light-permeable, the upper portion is shaded and cooled, fruit growth is facilitated, grape diseases and insect pests are reduced, the fruit quality is improved, and the fruit quality can be improved through the scientific grape cultivation technology.

The application relates to the technical field of grape planting and cultivation, and discloses a large-renewal grape cultivation method, which comprises the following steps: S1, rejuvenation after grape picking; S2, reserving base buds on fruiting branches after rejuvenation, and removing branches and vines above the base buds; S3, cultivating the base buds to germinate; and S4, cultivating the base buds to obtain first branches, shortening and pruning the first branches in winter, reserving a G branch on the main stem, continuing to cultivate the G branch to develop into fruiting branches of grapes in the next year, and picking the grapes until the grapes blossom, bear fruit, mature and are picked in the next year. Through the technical scheme, the problem of low yield caused by low flower formation rate of fruiting branches on the grape vine in the current year is solved.

The utility model discloses nutrition fertilizer spraying equipment for grape cultivation, which relates to the technical field of grape cultivation and comprises a base, a stirring mechanism is arranged at the top of the base, and a third motor is fixedly connected to one side, far away from the stirring mechanism, in the base. A rotating disc is fixedly connected to the portion, located above the base, of the output end of the third motor, a fixing column is fixedly connected to the top of the rotating disc, a first groove is formed in one side of the fixing column, and a lead screw is rotationally connected to the interior of the first groove. The spraying mechanism can be fixed during use, and through mutual cooperation of a second motor, a first groove, a fixing column, a rotating disc, a third motor and a lead screw, the direction of the spraying mechanism can be adjusted, and the spraying mechanism can ascend and descend, so that the flexibility is improved in different planting environments; and the detachable spraying mechanism can be used for handheld spraying when the robot is inconvenient to move forwards on the ground, so that the practicability is greatly improved.

A machine for soil tillage to be arranged on a towing vehicle, wherein when the towing vehicle is travelling in a travel direction an area of soil can be tilled with a soil tillage tool in an intermediate space between at least two obstacles, wherein the machine has a control device with which the soil tillage tool is pivotable into and out of the intermediate space and / or is movable in a transverse direction towards or away from the machine into the intermediate space, wherein the control device comprises an adjusting device which causes the soil tillage tool to pivot in and out and / or to move in the transverse direction by an adjustment amount after detection of an obstacle.

The invention belongs to the technical field of grape cultivation, and particularly relates to a grape and stropharia rugoso-annulata co-production system, which is characterized in that a plurality of rows of grape vines are cultivated in a greenhouse 6, the plurality of grape vines are linearly distributed, a culture material for cultivating stropharia rugoso-annulata is laid between two adjacent rows of grape vines along the linear direction, and the stropharia rugoso-annulata is planted in the greenhouse 6. The system comprises protection devices and spraying devices, the protection devices capable of covering the compost are arranged above each row of compost, the spraying devices capable of adjusting the positions of sprayers are arranged below grape vines, the protection devices comprise shading sheds capable of being opened and closed, the shading sheds capable of being opened and closed are covered with waterproof sheds capable of being opened and closed, and gaps are formed between the shading sheds and the waterproof sheds. The cultivation environment conditions such as temperature, humidity, pesticide application and illumination in the growth process of grapes and stropharia rugoso-annulata can be regulated and controlled respectively.

Post (P) for trellis systems for viticulture, characterized in that it is designed as a telescopic post (P), comprising two or more interlocking sub-elements (A, B1, B2,...Bn), of which a first, lower sub-element (A) is designed to be anchored in the ground and a second and optionally one or more further sub-elements (B1, B2,...Bn) are equipped with devices (1) for receiving double wires (2), wherein the devices (1) for receiving double wires (2) - are designed as wire holders made of a bent spring steel wire, preferably with a diameter in the range of approx. 1 to approx. 5 mm, in particular from approx. 2 mm to approx. 4 mm, which is attached centrally to the corresponding sub-element (B1, B2,...Bn) and has two free ends, with devices, in particular eyelets (3), which are advantageously not completely closed, for receiving the double wires (2) or - are designed as wire holders in the form of metal rods with a round or rectangular cross-section, which are arranged in the transverse direction to the corresponding sub-element (B1, B2,...Bn) and have two sections that extend in opposite directions beyond the sub-element (B1, B2,...Bn), in particular by about 5 to 15 cm, preferably by about 10 cm.

The present invention discloses a tree-shaped frame for cultivating grapes in a courtyard and a construction method thereof, comprising a wall body, wherein the wall body has a front wall and side walls fixed on both sides of the front wall, and further comprising: a main branch rod fixed on the front wall; branch rods on both sides fixed on the middle of the front wall, one end of the branch rods on both sides close to the main branch rod is fixedly connected to the main branch rod, and one end of the branch rods on both sides away from the main branch rod is respectively extended and fixed to the two side walls; two top branch rods fixed on the top of the front wall, one end of the two top branch rods close to the main branch rod is fixedly connected to the main branch rod, and one end of the two top branch rods away from the main branch rod is respectively extended and fixed to the two side walls; a plurality of vertical frames are provided, and the plurality of vertical frames are respectively fixed on the tops of the two side branch rods and the tops of the two top branch rods, and the other ends of the vertical frames are arranged facing upward. The present invention can provide a tree-shaped frame for cultivating grapes in a courtyard and a construction method thereof, realize the effective combination of grapevines and courtyard walls, and improve the growth environment of fruiting mother branches.

The utility model relates to the technical field of greenhouses, and discloses a grape planting greenhouse with a ceiling adjusting structure, which comprises a frame, the top end of the frame is fixedly connected with a plurality of arc-shaped supports, the frame and the outer walls of the arc-shaped supports are fixedly connected with heat preservation diaphragms, the left side and the right side of the arc-shaped support on the front side are fixedly connected with electric telescopic rods, and the electric telescopic rods are fixedly connected with the ceiling adjusting structure. A rack is fixedly connected to one end of the electric telescopic rod, a plurality of limiting hollow blocks are fixedly connected to the top end of the frame, a plurality of triangular transparent blocks are rotatably connected to the inner walls of the limiting hollow blocks, rotating columns are fixedly connected to the front side and the rear side of each triangular transparent block, and a cross-shaped groove is formed in the rear side of the rotating column on the rear side. The electric telescopic rod is started to drive the rack to move, the gear rotates along with the rack, the triangular transparent block rotates, the triangular transparent block refracts light rays, the light rays are scattered when strong, the irradiation range is enlarged when weak, and therefore it is ensured that grapes obtain appropriate illumination.

The invention relates to the technical field of grape cultivation, in particular to a pruning method for maintaining root growth in a grape double-harvest second-crop fruit starting stage, which is applied to the second-crop fruit starting stage in grape double-harvest cultivation, and specifically comprises the following steps: after the first-crop fruits of grapes are harvested, retaining 1-2 branches with leaves as carbon retaining branches; and carrying out gradual leaf protection pruning treatment on the rest fruiting mother branches. The core of the method is that branches and leaves of fruiting mother trees are not completely removed immediately in the second-crop fruit starting stage, part of branches and leaves are reserved for gradual transition, sudden interruption of tree body carbon flow is avoided, and sudden drop of root activity after branch tip pruning is prevented.

The invention provides a three-layer film covering type grape cultivation greenhouse which comprises two sets of support plates, a first frame and a second frame are both used for film covering, two sets of transverse frames are fixedly installed between the two sets of support plates, iron wires are connected between two sets of second connecting rods and a single set of first connecting rods, the middle of each iron wire is high, and the two sides of each iron wire are low. According to the greenhouse, the heat preservation and heat insulation performance of the greenhouse can be remarkably improved through the design of three-layer film covering. The first film layer serves as a basic heat insulation layer and can prevent external cold air from invading, and loss of heat in the greenhouse is reduced. The second layer of film further enhances the heat preservation effect, the clamping mechanism is connected with the movable rod, it is ensured that the film material is tightly attached to the surface of the greenhouse, and heat transfer is reduced. And the third layer of film is used as an additional heat preservation layer, especially in cold seasons, the temperature in the greenhouse can be remarkably increased, and a proper environment is provided for growth of grapes.

The invention relates to a steel sheet stake (1), particularly for use in viticulture, fruit growing, or fencing, consisting of a hollow profile. The stake has, at a lower end (101) intended to be planted in the ground, a foot extending into a main body (103) to an upper end opposite the lower end (101). According to the invention, a constriction (13) is provided in the foot of the stake such that the cross-section of the lower end (101) has a star shape, the area inscribed in the cross-section of the star at the lower end (101) of the stake being smaller than the area inscribed in the cross-section of the profile of the main body (103). (See Figure 3 for abbreviations.)