Photovoltaic desertification control system constructed by using vine plants and straws

Abstract

The invention discloses a photovoltaic desertification control system constructed by using vine plants and straws. The photovoltaic desertification control system comprises a vine plant wind-resisting sand-fixing barrier and a straw bionic sand-fixing barrier; the vine plant wind-resisting sand-fixing barrier comprises a plurality of vine plant units, and each vine plant unit comprises a vine support, a creeping vine and a climbing vine. The straw bionic sand-fixing barrier comprises a plurality of straws which cover the ground and are inserted into the ground. The mode that the vine plants and the straw are combined for desertification control is creatively adopted, the creeping vines and the root systems of the vine plants have the sand stabilization effect, the vine supports and the climbing vines are used for weakening wind power, the straw can be interwoven with the creeping vines and the root systems, a firm ground sand blocking barrier is formed, meanwhile, the moisture of the vine root systems can be kept, and the water content of the vine root systems can be kept. Growth of vine plants is maintained, the gallery acceleration effect between the plates is inhibited, meanwhile, the integrality and systematicness of wind resistance and sand fixation are enhanced, and the effects of intercepting sand and dust, reducing the sand accumulation thickness of a photovoltaic array area and improving the ecological environment of a field area are achieved on the whole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind-sand control, and in particular to a photovoltaic sand control system constructed by using vine plants and straw. BACKGROUND

[0002] Photovoltaic field areas are mostly located in arid and semi-arid sandy areas, and wind-sand erosion causes problems such as sand accumulation in photovoltaic panel areas and equipment damage, affecting power generation efficiency.

[0003] The ecological protection measures of existing photovoltaic field areas mostly rely on sand-fixing shrub plants (such as Haloxylon ammodendron, Calligonum, Artemisia etc.) for sand fixation. Although such plants have excellent properties such as drought tolerance, sand burial tolerance and wind resistance, their natural growth form is a low shrub structure, which cannot form a continuous and closed strip-shaped barrier structure, but only presents an isolated shrub-like distribution, resulting in a large number of gaps near the ground surface of the protection area, which is difficult to effectively block the wind-sand flow. At the same time, the shrub plants are limited by their own biological characteristics and cannot be constructed into a spatial structure through artificial intervention, and their wind resistance range is limited to the near-surface layer (0-50 cm height), and their weakening effect on the medium-low air speed above is minimal. The traditional method only has a limited weakening effect on the near-surface wind speed through the ground coverage, blocking and root sand fixation of the shrubs, and it is difficult to form a synergistic effect with engineering measures (such as triangular sand barriers and other types of sand barriers). In addition, the single shrub planting mode has low economic benefits and high long-term maintenance costs, and it is difficult to achieve sustainable balance between ecological protection and economic benefits.

[0004] In addition, at present, the grass checkerboard sand fixation is a widely used technology in desert control, which fixes the flowing sand by laying the wheat straw into the sand layer in a checkerboard pattern. However, the traditional grass checkerboard has the following problems: Complex construction: it needs to be laid according to the checkerboard structure, including manual line drawing, ditching, laying, inserting, and filling the base, which requires a large amount of work; High cost: the checkerboard structure requires high precision of straw materials and arrangement, consuming manpower and resources; Single structure: the fixed checkerboard structure and orientation have room for improvement in sand fixation effect when dealing with complex wind-sand environment, and the sand inside the checkerboard will be blown up and bury the checkerboard when it encounters strong wind.

[0005] In addition, a large amount of packaging of photovoltaic panels, cables and supports will be used during the construction of photovoltaic field areas, such as photovoltaic panel bases, cable rollers, wooden boxes for packaging supports, etc. These are all made of wooden multi-layer boards, and after the construction period ends, a large amount of waste will be formed, which needs to be concentrated on both sides of the road and transported out of the field area using forklifts and carts. At present, there is no effective way to utilize these waste, and the cleaning and transportation process causes a lot of waste. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a photovoltaic sand control system constructed by using vine plants and straws.

[0007] To achieve the foregoing objects, the present application employs the technical solutions of: The present application provides a photovoltaic sand control system constructed by using vine plants and straws, which is used for wind and sand control in a photovoltaic field. The photovoltaic sand control system comprises vine plant wind and sand barriers and straw bionic sand barriers. The vine plant wind and sand barriers comprise a plurality of vine plant units, each of which comprises a vine support, creeping vines and climbing vines. The length direction of the vine support is arranged at an intersecting angle with the first direction. The creeping vines are covered on the ground near the vine support, and the climbing vines are attached to the vine support. The straw bionic sand barriers comprise a plurality of straws covering the ground and straws inserted into the ground.

[0008] Based on the above technical solutions, the present application has at least the following beneficial effects compared with the prior art: The photovoltaic sand control system provided by the present application creatively adopts the sand control method of combining vine plants and straws. The creeping vines and root systems of the vine plants play a role in sand fixation, the vine supports and climbing vines are used to weaken the wind force, and the insertion and laying of the straws on the ground can interweave with the creeping vines and root systems to form a firm ground sand barrier. At the same time, the straws can also protect the vine plants from wind erosion and polishing, maintain the moisture of the vine roots, and maintain the growth of the vine plants. The vine plant wind and sand barriers between the photovoltaic panels and the photovoltaic panel array are interlaced with each other, respectively forming a rectangular or triangular structure in space, ensuring that the sand barriers and the photovoltaic field area layout are mutually coordinated, and the inter-panel corridor acceleration effect can be inhibited, while the overall wind and sand resistance and systematization are enhanced. The photovoltaic sand control system plays a role in intercepting dust, reducing the sand thickness in the photovoltaic array area, and improving the ecological environment of the field area.

[0009] The above description is only a summary of the technical solutions of the present application. In order for those skilled in the art to more clearly understand the technical means of the present application and can implement it according to the content of the description, the following describes the preferred embodiments of the present application with reference to the detailed drawings as follows. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic diagram of the overall structure of the photovoltaic sand control system provided by a typical embodiment of the present application; Figure 2 is a schematic diagram of the local layout of the photovoltaic sand control system provided by a typical embodiment of the present application; Figure 3 is a schematic diagram of the structure of a triangular vine plant wind and sand barrier provided by a typical embodiment of the present application; Figure 4 is a structural schematic diagram of the arched-shaped vine plant windbreak and sand-fixing barrier provided in an exemplary embodiment of the present application; Figure 5 is a structural schematic diagram of the dome-shaped vine plant windbreak and sand-fixing barrier provided in an exemplary embodiment of the present application; Figure 6 is a structural schematic diagram of the straw bionic sand-fixing barrier of the photovoltaic sand control system provided in an exemplary embodiment of the present application; Figure 7 is a planar structural schematic diagram of the grid sand barrier provided in an exemplary embodiment of the present application; Figure 8 is a structural schematic diagram of the grid support provided in an exemplary embodiment of the present application; Figure 9 is an oblique side view structural schematic diagram of the base barrier provided in an exemplary embodiment of the present application; Figure 10 is a structural schematic diagram of the assembled grid sand barrier provided in an exemplary embodiment of the present application; Figure 11 is a physical diagram of the grid support provided in an exemplary embodiment of the present application; Figure 12 is a physical diagram of the base barrier provided in an exemplary embodiment of the present application; Figure 13 is a physical diagram of the connecting piece of the grid sand barrier provided in an exemplary embodiment of the present application; Figure 14 is an oblique side view effect real scene photo of the existing grass checkerboard technology.

[0011] Mark explanation: 1, grid sand barrier; 2, vine plant windbreak and sand-fixing barrier; 3, straw bionic sand-fixing barrier; 4, photovoltaic panel; 5, first wind direction; 6, second wind direction; 7, peripheral fence; 8, ground; 11, grid support; 12, barrier; 21, triangular support; 22, arched-shaped support; 23, dome-shaped support; 31, inserted straw; 32, laid straw; 33, second straw; 111, gap; 121, top plate; 122, support leg; 123, bottom plate; 211, climbing vine; 212, creeping vine; 213, oblique support; 214, transverse support rod; 221, curved support rod; 231, dome framework. DETAILED DESCRIPTION

[0012] In view of the deficiencies in the prior art, the present inventors have long studied and practiced to come up with the technical solution of the present application. The technical solution, its implementation process and principles will be further explained as follows.

[0013] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details. In other instances, well-known methods have not been described in detail in order not to unnecessarily obscure aspects of the present application.

[0014] Also, the recitation of "first", "second", etc. does not necessarily imply any actual relationship or order between such elements, methods, or steps.

[0015] Referring to Figure 1 As shown in the drawings, the embodiment of the present application provides a photovoltaic sand control system constructed by vines and straws, which is used for wind and sand control in a photovoltaic field, the photovoltaic field comprising photovoltaic panels 4 arranged in multiple rows along a first direction; The photovoltaic sand control system comprises a vine wind-resistant sand-fixing barrier 2 and a straw bionic sand-fixing barrier 3; the vine wind-resistant sand-fixing barrier 2 comprises multiple vine units, each of which comprises a vine support, a creeping vine 212 and a climbing vine 211, the length direction of the vine support is arranged at an intersecting angle with the first direction, the creeping vine 212 covers the ground 8 near the vine support, and the climbing vine 211 is attached to the vine support; the straw bionic sand-fixing barrier 3 comprises multiple straws covering the ground 8 and straws inserted into the ground 8.

[0016] Based on the technical problems exposed in the field of ecological protection technology in photovoltaic field areas, the present application breaks through the limitations of traditional plant sand-fixing, and creatively selects drought-resistant vine-type economic plants such as black tomatoes and honeysuckle with climbing ability, and combines with a vine support system to construct a three-dimensional collaborative wind-resistant sand-fixing system of "plant-support-photovoltaic panel 4". Compared with traditional shrub plants, the vine plants can form a continuous closed three-dimensional wind-resistant barrier in a row belt shape by climbing through the vine support, and the branch and leaf density and height can be dynamically regulated through the growth and pruning process, the wind-resistant efficiency is significantly improved, and the accelerated effect between the panel corridors (i.e. the second wind direction 6 in the figure) can be effectively inhibited. At the same time, the vine support structure is compatible with the grid layout of the photovoltaic panel 4 array, which not only retains the sand-fixing function of traditional shrubs, but also superimposes the wind-resistant effect of the engineering sand barrier, forming a composite protection mode of "three-dimensional wind-resistant on the ground + ground creeping sand-pressing + sand-fixing by underground root system", solving the problems of single traditional plant sand-fixing technology and insufficient three-dimensional space wind-resistant sand-fixing efficiency.

[0017] In addition, the present application is subject to, for example, Figure 14The inclined side view effect of the field wheat sand-fixing square shown inspires to construct a sand-fixing method simulating the spatial distribution and structure of natural grassland gramineae plant community using wheat straw, corn straw and the like, which is combined with the above-mentioned creeping vines 212 and vine roots to form a layer of covering layer firmly covering the ground, interweaving to form a stable structure to avoid wind and sand erosion; the straw bionic sand-fixing barrier also plays a role in water conservation, protection and growth promotion, and can provide a suitable environment for the growth of vines, while the vigorous growth of vines in turn increases the degree of interweaving and superposition of vines and straw bionic sand-fixing barriers 3, thereby reinforcing the strength of the straw bionic sand-fixing barrier 3, and the two synergistically combined to achieve excellent wind and sand protection effect.

[0018] For the specific arrangement of the vines, please refer to Figure 2 As shown in the upper half of the figure in Figure 2 , in some embodiments, the length direction of the plurality of vine supports is the second direction, which is orthogonal to the first direction. The arrangement at this time is as shown in the upper half of the figure in , which has a lower cost and can also achieve a better inter-row wind and sand protection effect.

[0019] Or in some embodiments, as viewed from the direction perpendicular to the ground 8, the plurality of vine supports are connected end to end to form a polyline, the polyline is folded back and forth between adjacent two rows of photovoltaic panels 4, the length direction of the vine support includes a third direction and a fourth direction constituting the polyline, and the third direction and the fourth direction are both at a non-orthogonal intersection angle with the first direction. This arrangement can be as shown in the lower half of the figure in Figure 2 , although this arrangement has a higher cost, but due to the formation of the back-and-forth folding structure, it has stronger stability and stronger resistance to severe sand weather.

[0020] For the structure of a vine plant unit, please refer to Figures 3-5 As shown in some embodiments, the form of the vine support includes any one or a combination of two or more of a triangular support 21, an arched support 22 and a dome-shaped support 23.

[0021] As shown in Figure 3 , the triangular support 21 includes an inclined support 213 and a transverse support rod 214, the inclined support 213 includes an inclined insertion support rod with its top end connected and its bottom end inserted into the ground 8 in different directions; as shown in Figure 4 , the transverse support rod 214 is sequentially fixedly connected with a plurality of inclined supports 213 arranged in a row; the arched support 22 includes a curved support rod 221 and a transverse support rod 214, both ends of the curved support rod 221 are inserted into the ground 8 to form an arched structure, and the transverse support rod 214 is sequentially fixedly connected with a plurality of arched structures arranged in a row; as shown in Figure 5As shown, the dome-shaped support 23 comprises a dome skeleton 231 formed by the ends of the cross-shaped support rod group inserted into the ground 8 and the circumferential support rods wrapped around the dome skeleton 231. Of course, the specific structure can not be limited to this, as long as the vine support can be firmly erected on the ground 8 and the vine plants can climb on it.

[0022] For the specific selection of vine plants, in some embodiments, the vine plant varieties used by the vine plant unit include any one or a combination of two or more of black tomatoes, wolfberry, sand grapes, honeysuckle, and gualou. These vine plants are some crops with strong drought resistance and certain economic benefits, which can produce certain economic benefits while controlling wind and sand, and supplementing sand control investment.

[0023] More specifically, for the optimal planting density, in some embodiments, the row spacing of the vine plants is 3-8 m, and the plant spacing is 0.5-1 m.

[0024] In addition, regarding the specific structure of the straw bionic sand fixation barrier 3, as shown in Figure 6 In some embodiments, the straw bionic sand fixation barrier 3 comprises first straws and second straws 33, the diameter and length of the second straws 33 are higher than those of the first straws, the first straws are divided into inserted straws 31 and laid straws 32, the bottom end of the inserted straws 31 is inserted into the ground 8, the laid straws 32 and the second straws 33 are laid on the ground 8 in random multiple directions, and the top end of the inserted straws 31 is higher than the laid layer composed of the laid straws 32 and the second straws 33.

[0025] In some embodiments, the first straws are selected from any one or a combination of two of wheat straw and rice straw, and the second straws 33 are selected from corn straw.

[0026] In some embodiments, the length of the first straws is 50-100 cm, the first straws are inserted into the sand surface at about the middle position, the insertion depth is 5-10 cm, the thickness of the laid layer is 2-5 cm, and the coverage is 80%-100%.

[0027] In some embodiments, the laying density of the second straws 33 is 2-5 per square meter.

[0028] In some embodiments, the second straws 33 are in the upper layer of the laid layer.

[0029] In addition, in order to strengthen the wind and sand protection effect, in some embodiments, referring back to Figure 1As shown, the photovoltaic sand control system further comprises a grid sand barrier 1 arranged at the periphery of the photovoltaic field, comprising grid supports 11 and barrier bodies 12, and a plurality of the grid supports 11 and barrier bodies 12 form a grid when viewed from a direction perpendicular to the ground 8, the grid supports 11 are located at the intersection of the grid, and the barrier bodies 12 constitute the lines of the grid.

[0030] Specifically, see Figure 7 As shown, in some embodiments, the grid sand barrier 1 has a zigzag shape when viewed from a direction perpendicular to the ground 8.

[0031] In some embodiments, the grid sand barrier 1 is arranged at the perennial windward direction of the periphery of the photovoltaic field.

[0032] For the many wastes formed during the construction and maintenance of the photovoltaic field described above, the preferred mode of the present application can recycle these wastes, that is, in some embodiments, Figures 8-10 As shown, the grid supports 11 include cable rollers generated during the construction or maintenance of the photovoltaic field, and the barrier bodies 12 include base pallets and / or packaging boards generated during the construction or maintenance of the photovoltaic field; the cable rollers are erected on the ground 8 with an axis perpendicular to the ground 8, and the cable rollers are radially provided with a gap 111, and the edges of the base pallets and / or packaging boards are embedded in the gap 111 and fixedly connected to the cable rollers by connecting members.

[0033] The technical solutions of the present application are further described in detail by the following examples. However, the selected examples are only used to illustrate the present application, and do not limit the scope of the present application.

[0034] The embodiments of the present application provide a photovoltaic sand control system, which is composed of a zigzag large grid sand barrier 1, a vine plant wind-resistant sand-fixing barrier 2, a straw bionic sand-fixing barrier 3, and a wind-sand protection system 4.

[0035] Specifically, at the periphery of the photovoltaic field area in the windward direction, generally on the prevailing wind side (such as Figure 1 As shown in the first wind direction 5), a zigzag large grid wind-resistant sand-fixing structure is constructed by using various packaging wastes generated during the construction of the photovoltaic field area, which is perpendicular to the main wind direction, as the grid sand barrier 1, and forms the first protective barrier outside the fence 7 of the photovoltaic power plant, so as to block and fix as many sand sources transported from the outside to the inside of the power plant as possible, and reduce the sand accumulation at the edge of the array area.

[0036] In the photovoltaic field area, the economic plant of vine type is used to construct the wind and sand prevention system. Through the cooperation of plant planting, natural material support system and photovoltaic field area layout, efficient wind and sand prevention is realized, and economic benefits are created. Meanwhile, a wheat straw sand fixation method with simple construction, low cost and better sand fixation effect is adopted to simulate the spatial distribution and structure of natural grassland gramineous plant community, and the sand fixation efficiency is improved.

[0037] The above four parts are described as follows: (1) Zigzag large mesh sand barrier 1 The zigzag large mesh sand barrier 1 is composed of barrier body 12, mesh support 11 and connecting piece 3. The barrier body 12 and the mesh support 11 are both made of multi-layer composite board. The barrier body 12 is a base for packaging waste photovoltaic panels 4, as shown in Figure 9 and Figure 12 . It is composed of top plate 121, support leg 122 and bottom plate 123. The top plate is a multi-layer composite wood board with a length of 2 m, a width of 1 m and a thickness of 2.5 cm. The support leg is a wood square made of multi-layer composite board with a length of 10 cm, a width of 10 cm and a height of 10 cm. The bottom plate is a multi-layer composite wood strip with a length of 2 m, a width of 10 cm and a thickness of 2.5 cm.

[0038] The support is a roller for packaging waste cable. As shown in Figure 11 , it is formed by two circular wood plates with a hollow cylindrical wood support or a hard paper tube structure in between. The roller has open slits 111 in the cross direction for clamping and connecting adjacent vertical bases.

[0039] The diameter of the circular wood plate is 0.8-1.5 m, and the thickness is 2.5 cm. The diameter of the hollow cylindrical wood structure is 0.4-1 m, and the height is 0.4-1 m. The width of the slit 111 is suitable for the thickness of the barrier body 12.

[0040] The connecting piece can be a special connecting piece for wood plates (iron sheet with nails) or white iron sheet and nails, as shown in Figure 13 , which serves to connect the barrier body 12 (base) and the support (roller).

[0041] The laying method is as follows: the base is erected on the ground, combined with the roller as a support, and forms a connecting structure between the bases to construct the zigzag large mesh sand barrier 1. The vertical base serves as a high vertical sand barrier, and the connected roller serves as a double role of connecting the base and the sand barrier. Parallel multiple arrangements are made on the windward periphery of the photovoltaic field area to block and fix the sand from the windward direction, and to inhibit the wind and sand from invading the inside of the field area, especially the edge zone of the windward direction of the field area.

[0042] The wind and sand prevention and control of the photovoltaic field area is carried out by using the self-produced waste in the construction process of the photovoltaic field area to establish a wind prevention and sand fixation structure, so as to realize the beneficial effects of taking waste from the photovoltaic field area, serving the photovoltaic field area and changing waste into materials. The cost of cleaning and transporting is saved, and the waste is used to build a wind and sand prevention system of the photovoltaic power station, so as to reduce the harm of wind and sand in the field area.

[0043] (2) Vine plant wind and sand prevention and control barrier 2 The vine plant wind and sand prevention and control barrier 2 is composed of three parts of vine type economic plants, natural material vine supports and photovoltaic field area adaptive layout structure.

[0044] The vine type economic plants can be selected from drought-resistant and wind-resistant vine type economic plants such as black tomatoes, wolfberry, sand grape, honeysuckle and gualou. The root system of the vine type economic plants can fix sand, and the branches and leaves can prevent wind, so as to form a creeping vine ground cover and a climbing vine three-dimensional wind prevention structure.

[0045] The vine supports are made of branch materials such as poplar, saxifrage, red willow and bamboo materials which are easily obtained in the local area, and the supports are triangular vine supports 21, arched vine supports 22 or dome-shaped vine supports 23. The height of the supports is 20-30 cm lower than the bottom of the photovoltaic panel 4 to avoid blocking the light, and at the same time, the supports provide support for the climbing of plants and enhance the wind prevention effect.

[0046] The photovoltaic field area adaptive layout structure is that the planting rows are arranged in a straight line along the north-south extension direction or in a zigzag shape along the east-west direction in the panel-to-panel area of the photovoltaic field area, the row spacing is 3-8 m, and the plant spacing is 0.5-1 m, so as to form a continuous wind prevention barrier.

[0047] The construction method of the above-mentioned vine plant wind and sand prevention and control barrier 2 can be as follows: 1. Support construction: the branch materials such as poplar, saxifrage, red willow and sand willow or bamboo materials which are easily obtained in the desert area are selected as the support materials. Based on the east-west layout of the photovoltaic panel 4, the planting rows are arranged in a straight line along the north-south extension direction or in a zigzag shape along the east-west direction in the 7-11 m wide planting area between the panels.

[0048] The specific support construction method is as follows: Triangular support 21 construction: in each planting row, the supports are constructed in a triangular structure with a vertical cross section, including inclined supports 213 and horizontal support rods 214 connected together. Along the planting row, a plurality of branches are inserted into the ground 8 in an inclined and symmetrical manner (the angle with the ground 8 is controlled to be 55°-75°), and the inclined supports 213 are formed on the left and right sides of the inclined supports 213. A plurality of branches are symmetrically arranged on the top of the intersecting inclined supports and on both sides of the inclined supports, and are bound and fixed by iron wire or hemp rope to form horizontal support rods 214, so as to finally form a row of triangular structure supports.

[0049] The arched support 22 is constructed: in each planting row, the support is built in an arched structure. Along the planting row, first insert multiple branches into the ground 8 in a circular arc shape, with a spacing of 30-50 cm, then fix multiple branches horizontally and parallel to the outside of the circular arc branches. At the intersection of the circular arc branches and the horizontal branches, tie and fix them with iron wire or hemp rope to form an arched support 22.

[0050] The dome-shaped support 23 is constructed: in each planting row, the support is built in a dome-shaped structure. Along the planting row, first form a dome-shaped structure by inserting multiple branches into the ground 8 with the top circular arc intersecting and the bottom circular arc inserted into the ground 8, then surround multiple branches horizontally around the outside of the dome structure. At the intersection of the circular arc branches and the horizontal branches, tie and fix them with iron wire or hemp rope to form a semi-spherical dome-shaped support 23.

[0051] 2. Field layout coordination: The various structures of the support extending north-south in the inter-row planting, or the various structures of the support extending zigzag east-west, are interlaced with the photovoltaic panel 4 array arranged east-west, which has wind resistance effect itself, to form a rectangular or triangular structure in space. This layout ensures the coordination between the sand barrier and the photovoltaic field layout, inhibits the acceleration effect of the inter-row corridor, and enhances the overall and systematic nature of wind resistance and sand fixation.

[0052] 3. Planting and management: Transplanting the seedlings of climbing economic plants, guiding the vines to climb along the support, and retaining part of the creeping vines 212 on the ground. Regularly pruning branches and leaves to balance the wind resistance effect and plant growth; reinforcing the support before the sandstorm season and retaining part of the old vines in winter to assist in sand fixation.

[0053] With the above structure, the following beneficial effects can be achieved.

[0054] Ecological benefits: The creeping vines 212 and root systems of the plants fix sand, and the support and climbing vines 211 weaken wind power. The sand fixation barrier 2 and the photovoltaic panel 4 array are interlaced, forming a rectangular or triangular structure in space. This layout ensures the coordination between the sand barrier and the photovoltaic field layout, inhibits the acceleration effect of the inter-row corridor, and enhances the overall and systematic nature of wind resistance and sand fixation. It plays a role in intercepting dust, reducing the thickness of sand accumulation in the photovoltaic array area, and improving the ecological environment of the field area.

[0055] Economic benefits: Black tomatoes, wolfberry, honeysuckle, and other plants have economic value, which can increase income through the sale of fruits and medicinal materials, and in turn support sand control investment.

[0056] Sustainability: Natural material supports are easy to obtain and low in cost, and the planting of plants is coordinated with the existing irrigation system of the photovoltaic field area, with low maintenance cost and strong sustainability.

[0057] Taking the construction of a black tomato wind resistance and sand fixation system as an example, the specific construction process is as follows.

[0058] Site preparation: In the photovoltaic field area, select the sand area between photovoltaic panels 4, and remove debris.

[0059] Support construction: Use poplar or tamarisk as materials, cut into 1.5-2m long branches, build triangular supports 21 around black tomato seedlings, tie and fix the top end with hemp rope, bury the branches 0.2-0.3m deep, and the support height is 1.2-1.8m.

[0060] Planting and management: transplant black tomato seedlings, and optionally plant alfalfa to improve the soil in the first two years, with a plant spacing of 0.5-1m and a row spacing of 2.5-5m. In the area between the panels, each row is arranged in a north-south direction perpendicular to the photovoltaic panels 4, forming a rectangular structure with the photovoltaic panels 4, or in a zigzag shape, forming a triangular structure with the photovoltaic panels 4. Regularly water through the drip irrigation system, guide the vines to climb the supports during the growing season, prune the dense branches and leaves in summer, ensure nutrient supply during the fruiting period, and retain old vines and branches in winter for wind resistance and sand fixation in the winter and spring wind seasons.

[0061] Take the construction of a honeysuckle-gouqi complex wind resistance and sand fixation system as an example, which is shown as follows.

[0062] Layout design: In the key areas of wind and sand invasion at the edge of the photovoltaic field, plant alternately in a grid pattern, with a row spacing of 2.5-5m and a plant spacing of 0.5-1m.

[0063] Support construction: In the grid planting area, use bamboo to build a grid support 11 with a horizontal and vertical bamboo rod spacing of 0.5-1m to form a vine climbing grid.

[0064] Planting and management: After transplanting honeysuckle and gouqi seedlings, water through the drip irrigation system. Regularly check the stability of the support, prune the gouqi branches in spring to promote fruiting, harvest honeysuckle in a timely manner after flowering, and retain vines and branches to maintain wind resistance in the wind season.

[0065] Through the above implementation, an efficient wind resistance and sand fixation system can be constructed inside the photovoltaic field area, achieving the dual goals of ecological protection and economic benefits.

[0066] (3) Straw bionic sand fixation barrier 3 The straw bionic sand fixation barrier 3 uses different sizes of crop straw to form a stable structure by cross combination, and the construction steps are shown as follows.

[0067] Straw pretreatment: Select straw such as wheat straw and rice straw with a length of 50-100cm.

[0068] Laying straw 32: In the area to be fixed, randomly lay the straw on the sand surface, with the straw extending in a random direction, and the covering thickness controlled at 2-5cm, so that it uniformly covers the ground surface with a coverage of 80%-100%.

[0069] Insert straw 31 to make it stand upright: Use a shovel to randomly select a position and insert the straw into the sand layer at about the middle position, with an insertion depth of 5-10cm, so that some of the straw is in an upright or oblique position. The proportion of upright and oblique straw should be controlled at 15%-25% of the total straw amount. These upright and oblique straws can play a certain role in fixing the flat-laid straw 32.

[0070] Flat corn stalk layer: A layer of corn stalks is laid flat on top of the wheat straw. The corn stalks are laid randomly in terms of position and direction of extension, with a density of 2-5 stalks per square meter. They are pressed on top of the wheat straw to further fix the wheat straw and prevent it from being blown away by the wind.

[0071] The beneficial effects of using the above method are as follows.

[0072] Improved construction efficiency and reduced costs: Traditional straw checkerboard construction is complex, requiring multiple steps such as manual marking, trenching, laying, inserting, and burying the base. In contrast, this invention only requires a small amount of insertion work on 15%-25% of the straw in random positions and directions, with most of the straw laid flat. This significantly reduces the overall workload, saves labor costs, and improves construction efficiency compared to traditional straw checkerboard construction.

[0073] Optimization of sand fixation and windbreak effects: The positions and directions of the upright straws are randomly distributed to simulate the spatial distribution and structural characteristics of the grass community in natural grassland. This can better fix sand coming from multiple wind directions and has a more balanced ability to block sand from different directions. The amount of straw 32 laid flat is larger, and the overlapping area between the layers of straw is larger, with strong mutual support, which enhances the stability of the sand fixation structure.

[0074] It has better water retention and anti-evaporation effects: In this embodiment, the amount of straw laid flat is greater than that of traditional straw squares, and the straw covers a wider area and a greater thickness on the sand surface. This can effectively reduce water evaporation in the sand, improve water retention capacity, and create a more favorable microenvironment for the growth of psammophytes. After 2-3 years, the decomposed straw can provide more organic matter for the plants and better promote the growth of the crust.

[0075] (4) The above-mentioned technical means form an overall protection system: First, parallel zigzag-shaped large-grid sand barriers 1 are built around the perimeter of the photovoltaic power plant to block and fix the shifting sand and cut off the external sand source; Second, in the inner edge area of ​​the site, specifically from the north edge to the south side, 20-30 rows of photovoltaic panels 4 are installed, with vine plants installed between the panels to block the wind and fix the sand 2, and straw bionic sand fixation barriers 3 are installed between and under the panels to reduce the acceleration effect of the east-west corridor between the panels, fix the shifting sand, and generate economic benefits; The whole system serves as a photovoltaic power plant wind and sand protection system that provides external blocking and internal fixation while also generating economic benefits. By simplifying the construction process and simulating the natural structure, efficient sand fixation is achieved, which has broad application prospects in desertification control.

[0076] It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A photovoltaic desertification control system constructed using vines and straw for wind and sand control in a photovoltaic field, wherein the photovoltaic field includes photovoltaic panels arranged in multiple rows along a first direction; Its features are, The photovoltaic desertification control system includes windbreaks and sand-fixing barriers made of vine plants and biomimetic sand-fixing barriers made of straw. The windbreaks and sand-fixing barriers made of vine plants include multiple vine plant units, each of which includes a vine support, creeping vines, and climbing vines. The length direction of the vine support is set at an angle to the first direction. The creeping vines cover the ground near the vine support, and the climbing vines are attached to the vine support. The biomimetic sand-fixing barriers made of straw include multiple straws covering the ground and straws inserted into the ground.

2. The photovoltaic desertification control system according to claim 1, characterized in that, The length direction of the plurality of vine supports is a second direction, and the second direction is orthogonal to the first direction; Alternatively, viewed from a direction perpendicular to the ground, multiple vine supports are connected end to end to form a zigzag line. The zigzag line folds back and forth between two adjacent rows of photovoltaic panels. The length direction of the vine supports includes a third direction and a fourth direction that constitute the zigzag line. Both the third direction and the fourth direction intersect the first direction at a non-orthogonal angle.

3. The photovoltaic desertification control system according to claim 1, characterized in that, The vine support can take the form of any one or a combination of two or more of the following: triangular support, arched support, and dome support. The triangular support includes diagonal supports and horizontal support rods. The diagonal supports include diagonally inserted support rods that are connected at the top and inserted into the ground at the bottom in different directions. The horizontal support rods are sequentially and fixedly connected to multiple diagonal supports arranged in a row. The arched support includes curved support rods and transverse support rods. The two ends of the curved support rods are inserted into the ground to form an arched structure. The transverse support rods are sequentially fixedly connected to multiple arched structures arranged in a row. The dome-shaped support includes a dome frame formed by the ends of intersecting struts inserted into the ground, and circumferential struts surrounding the dome frame.

4. The photovoltaic desertification control system according to claim 1, characterized in that, The vine plant varieties used in the vine plant unit include any one or a combination of two or more of the following: black tomato, goji berry, sandy grape, honeysuckle, and trichosanthes.

5. The photovoltaic desertification control system according to claim 4, characterized in that, The row spacing of the vine plants is 3-8m, and the plant spacing is 0.5-1m.

6. The photovoltaic desertification control system according to claim 1, characterized in that, The straw biomimetic sand-fixing barrier includes a first straw and a second straw. The diameter and length of the second straw are greater than those of the first straw. The first straw is divided into inserted straw and flat straw. The bottom end of the inserted straw is inserted into the ground. The flat straw and the second straw are laid on the ground in multiple random directions, and the top end of the inserted straw is higher than the layer formed by the flat straw and the second straw.

7. The photovoltaic desertification control system according to claim 1, characterized in that, The first straw is selected from any one or a combination of two of wheat straw and rice straw, and the second straw is selected from corn straw; And / or, the length of the first straw is 50-100cm, the insertion depth is 5-10cm, the thickness of the laying layer is 2-5cm, and the coverage is 80%-100%; And / or, the second straw is laid at a density of 2-5 straws per square meter; And / or, the second straw is located on top of the laying layer.

8. The photovoltaic desertification control system according to claim 1, characterized in that, It also includes a grid sand barrier, which is set on the outer perimeter of the photovoltaic field and includes a grid support and barrier body. When viewed from a direction perpendicular to the ground, multiple grid supports and barrier bodies form a grid, with the grid supports located at the intersections of the grid and the barrier bodies forming the lines of the grid.

9. The photovoltaic desertification control system according to claim 8, characterized in that, Viewed from a direction perpendicular to the ground, the shape of the grid sand barrier is a zigzag shape; And / or, the grid sand barrier is set in the windward position of the photovoltaic field throughout the year.

10. The photovoltaic desertification control system according to claim 1, characterized in that, The grid support includes cable rollers generated during the construction or maintenance of the photovoltaic field, and the barrier includes a base support plate and / or packaging plate generated during the construction or maintenance of the photovoltaic field. The cable roller is erected on the ground with its axis perpendicular to the ground, and a slit is provided in the radial direction of the cable roller. The edge of the base plate and / or packaging plate is embedded in the slit and fixedly connected to the cable roller through a connector.

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