Search

CN-121986619-A - Arbor-shrub-grass synergistic sand barrier and vegetation restoration method under difficult-to-land condition of sand

CN121986619ACN 121986619 ACN121986619 ACN 121986619ACN-121986619-A

Abstract

The invention discloses a arbor and shrub synergistic sand barrier and a vegetation restoration method under a difficult sandy land condition, wherein the sand barrier comprises an original salix psammophila sand barrier of a sandy land and a mixed movable sand barrier, the mixed movable sand barrier comprises arbor, shrubs and herbs, the arbor is a sandy garden burnet, the shrubs are caragana korshinskii and sea buckthorn, the herbs are leymus chinensis, wheatgrass, white grass and sand, the arbor and shrubs are planted in the original salix psammophila sand barrier in the vegetation restoration area of the sandy land, and the grass seeds are sowed in the vegetation restoration area of the sandy land. According to the invention, the arbor, shrub, herb and the existing sand barrier are organically combined and arranged in a echelon manner, so that the existing wind-proof and sand-fixing engineering is perfected, the sand-fixing effect is improved, and the vegetation survival rate of the area is obviously improved. Meanwhile, the problems of single species, species diversity and poor ecological toughness and the problem of short life of the sand-blocking barrier of the traditional salix psammophila are solved.

Inventors

  • YU KUNXIA
  • WANG CHENYU
  • JIA LU
  • LI XUE
  • XU GUOCE
  • LI PENG
  • LI ZHANBIN

Assignees

  • 西安理工大学

Dates

Publication Date
20260508
Application Date
20260127

Claims (10)

  1. 1. The arbor and shrub synergistic sand barrier is characterized by comprising an original salix psammophila sand barrier of the muddy dashing sand and a mixed movable sand barrier, wherein the mixed movable sand barrier comprises arbor, shrubs and herbs, the arbor is sand sanguisorba officinalis, the shrubs are caragana korshinskii and seabuckthorn, the herbs are sheep grass, wheatgrass, white grass and sand, the arbor and shrubs are planted in the original salix psammophila sand barrier in a vegetation recovery area of the muddy dashing sand, and the grass seeds are sowed in the vegetation recovery area of the muddy dashing sand.
  2. 2. The arbor and shrub synergistic sand barrier under difficult-to-land conditions of claim 1, wherein the arbor plant line spacing is set between 4m-8m, the shrub plant line spacing is set between 2m-4m, and arbor and shrub are planted in an area greater than 60cm from the salix matsudana sand barrier.
  3. 3. The arbor and shrub synergistic sand barrier under difficult-to-land conditions in accordance with claim 1, wherein the original salix psammophila sand barrier is a grid-shaped sand barrier, arbor and shrubs are planted in open square space where the grid-shaped sand barrier is located, or the original salix psammophila sand barrier is a strip-shaped sand barrier, arbor and shrubs are planted between rows of the strip-shaped sand barrier.
  4. 4. The arbor and shrub synergistic sand barrier under the condition of difficult sandy land according to claim 1, wherein the sowing amount of grass seeds is 8 kg-9 kg per mu.
  5. 5. The arbor and shrub synergistic sand barrier under sandy difficult site conditions according to claim 1, wherein the addition ratio of the leymus chinensis to the xawang to the white grass is = 1.3:0.8:1:1.3.
  6. 6. A method for recovering vegetation aiming at a muddy dakesand, which is characterized by adopting the arbor-shrub synergistic sand barrier under the condition of difficult sandy land according to any one of claims 1-5, and comprising the following specific steps: determining the existing vegetation distribution condition and the planned salix psammophila sand barrier arrangement range in the muddy sand land vegetation restoration area; Determining a planting scheme of arbor and shrub seedlings according to water resource conditions in a range of the vegetation recovery area of the armyworm sand, and planting arbor and shrubs in a range of the salix psammophila sand barrier according to the planting scheme; Determining a grass seed sowing mode and the consumption according to the area of the vegetation recovery range of the muddy sand land, and sowing grass seeds; And (3) periodically detecting the vegetation recovery range and evaluating the recovery condition, and reseeding the area with the vegetation survival rate lower than 60%.
  7. 7. The method of recovering vegetation for muddy das of claim 6, wherein the planting scheme of the arbor and shrub seedlings is as follows: If annual precipitation in the vegetation recovery area exceeds 300mm and approaches to a natural water source, adopting a composite high-density arbor and shrub configuration scheme, wherein the arbor plant spacing is 4m, the row spacing is 6m, two rows of shrubs are planted in parallel between the two rows of arbor, the bush plant spacing is set according to 2m multiplied by 2m, and the two shrubs are alternately planted; If the precipitation amount in the area is less than 300mm, a composite low-density arbor-shrub configuration scheme is adopted, specifically, the arbor plant spacing is set to be 4m, the row spacing is set to be 8m, shrubs are alternately planted between rows, the bush plant spacing is set to be 4m, the two shrubs are alternately planted, and if the shrubs are blocked by salix psammophila in the planting process, the plant row spacing of the arbor and the shrubs is adjusted, so that the area with the distance of more than 60cm is suitable.
  8. 8. The method for recovering vegetation on a muddy dakesha land according to claim 7, wherein when planting the young sanguisorba officinalis according to the planting scheme of the selected arbor and shrub seedlings, first digging a planting hole of about 30cm according to the planting point, putting the young sanguisorba officinalis, covering half of the soil and compacting, and covering the planting hole with the soil after watering about 500mL of water in the planting hole to reduce water evaporation.
  9. 9. The method for recovering vegetation on a muddy dakesha land according to claim 6, wherein the grass seed sowing mode is characterized in that for a vegetation recovery area with an area smaller than 100 mu, grass vegetation is sown in a drill mode, a rake is used for ditching in bare land, the ditch depth is about 5cm, after grass seeds are uniformly sowed in the ditch, the ditch is smoothed by the rake, and for a vegetation recovery area with an area larger than 100 mu, the grass seeds are sowed in a unmanned aerial vehicle fly sowing mode.
  10. 10. The method for recovering vegetation for muddy das of claim 6, wherein the recovery condition evaluation is carried out by integrating and evaluating vegetation form characteristics, soil moisture condition, soil nutrient condition and site condition, and the recovery is good when the total element standard rate is more than or equal to 80%.

Description

Arbor-shrub-grass synergistic sand barrier and vegetation restoration method under difficult-to-land condition of sand Technical Field The invention belongs to the technical field of vegetation restoration, and particularly relates to a arbor and shrub synergistic sand barrier under a difficult-to-land condition of a sand land and a vegetation restoration method. Background The sand ecological system restoration, sand prevention and sand control are important application directions in the field of ecological protection, and especially in arid and semiarid regions, the expansion of sand and the desertification of land become core problems of threat to the ecological safety of the region and the production and living of residents. Taking the muddy dakesha as an example, the typical sand ecological system forms unique elm forests and grassland landscapes due to the distribution of numerous small lakes and seasonal rivers. However, in recent decades, due to the influence of human activities such as overgrazing and reclamation, grassland degradation and land desertification are aggravated, the area of a movable dune is enlarged, and typical desertification features such as a wind erosion pit become ecological breakdowns for desertification expansion. The application of the sand control engineering in the areas aims to inhibit the activation of sand dunes and repair vegetation coverage by manual intervention measures so as to control desertification process. Currently, sand control and control of a muddy das sand land mainly depend on the traditional sand barrier technology, and the sand control technology comprises mechanical or manual layout of a salix psammophila sand barrier (a live sand barrier) and a dead sand barrier (such as straw, stone and the like). The technology can realize the sand fixing effect in a short period by physically blocking wind power and fixing surface sand grains, is widely applied to sand, desert edges and areas with serious wind erosion, and is one of the main stream means of the current sand prevention and control engineering. Conventional sand barrier technology exposes multiple problems in application. Firstly, dead sand barriers (such as straws and stones) are easy to degrade and fragile in structure, the service life is usually only 1-3 years, long-term sand erosion is difficult to resist, frequent replacement and maintenance are required, and high cost and large manpower investment are caused. Secondly, although the salix psammophila sand barrier forms a living barrier through asexual propagation, species singleness causes insufficient ecological toughness, the root system of the salix psammophila sand barrier is shallow (usually concentrated on the ground surface by 0-50 cm), the capability of fixing deep soil is limited, the growth cycle is concentrated from spring to summer, and the windproof effect in the winter dormancy stage is weakened. In addition, a single species is susceptible to attack by pests and disease, and is susceptible to degradation failure in extreme climates (e.g., drought, severe cold). More importantly, the traditional sand barriers only pay attention to surface sand fixation, a complete vegetation community is not constructed, and the self-repairing capability of the system cannot be improved through interaction among plants (such as root complementation and canopy shading), so that the double dilemma of difficult early treatment and difficult later maintenance is caused. To solve the above problems, the prior art attempts to improve the sand-fixation effect by optimizing sand-barrier materials or introducing auxiliary measures. For example, some studies have used chemical sand-fixation agents (e.g., high molecular polymers) to enhance sand-grain adhesion, to extend life of dead sand barriers, or by hybrid planting (e.g., huang Liuyu sand-sagebrush collocation) to increase species diversity. However, the schemes still have the limitations that the chemical sand fixing agent can pollute soil and underground water and has high cost, and the mixed planting can promote the short-term sand fixing effect, but the plant function difference (such as layering layout of deep-root plants and shallow-root plants) is not considered by a system, so that the efficient utilization of resources is difficult to realize. In addition, the prior art still mainly uses passive sand fixation, namely wind erosion is reduced through physical obstruction or single plant barrier, and ecological functions (such as nitrogen fixation and water retention) of plant communities are not fully utilized to form an active repairing mechanism, so that the stability and adaptability of the system are insufficient. The core problem of the prior art is that the thinking limitation of sand fixation by a single means is not broken through, so that the sand prevention and fixation system lacks sustainability and toughness. The method is characterized in that a multi-level vegetation structure is n