Three-stage afforestation method in desertification area

Abstract

This invention belongs to the field of afforestation technology, specifically relating to a three-stage afforestation method for desertified areas. It includes: First stage, sand-stabilizing barrier construction: erecting a barrier wall facing the wind according to the wind direction; the barrier wall is constructed by planting Artemisia arenaria at a spacing of 50cm-70cm, tearing the Artemisia arenaria in half lengthwise, connecting the two halves sequentially; Second stage, in the autumn of the year or the following year after the barrier wall is erected, planting leguminous shrubs on the leeward side of the barrier wall; Third stage, in the second or third year after the barrier wall is erected, planting trees or shrubs at the barrier wall location. In this method, the barrier wall in the first stage is used to stabilize sand and retain water, preventing wind erosion; the leguminous shrubs in the second stage are used to enhance the stability of the sandy soil and retain moisture; the trees or shrubs in the third stage are used to plant the main tree species to form a forest; the three stages are used in combination to improve the survival rate of afforestation.

Description

Technical Field

[0001] This invention belongs to the field of afforestation technology, specifically relating to a three-stage afforestation method for desertified areas. Background Technology

[0002] The prominent climatic characteristics of desertified areas are scarce rainfall, high evaporation, severe wind erosion, low soil organic matter content, and great difficulty in vegetation restoration. Afforestation techniques in desert areas have been continuously developed, mainly including the following measures:

[0003] (1) Soil and water conservation: such as deep plowing, application of organic fertilizer, and laying of covering materials.

[0004] (2) Cultivate tree species with strong resistance, such as Haloxylon ammodendron and Tamarix chinensis.

[0005] (3) Strengthen management: such as introducing artificial intelligence, big data and other methods to control pests and diseases and natural disasters in afforestation areas.

[0006] However, due to the scarcity of water resources, poor soil quality, and harsh climate conditions in desert areas, it is extremely difficult to both conserve water and soil and improve the survival rate of vegetation during the afforestation process. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a three-stage afforestation method for desertified areas. Targeting the characteristics of wind and water in desert areas, the afforestation method is implemented in three stages: planting sand-fixing barriers in spring, planting nitrogen-fixing shrubs in autumn to stabilize the soil, and planting trees or economic forest shrubs in the rainy season to form a forest. The afforestation survival rate can reach 90%.

[0008] The purpose of this invention is to provide a three-stage afforestation method for desertified areas, which takes two to three years to complete in total, including:

[0009] Phase 1: Sand Barrier and Stabilization

[0010] The barrier construction abandons the traditional technique of using straw to block and trap sand. Instead, it uses Artemisia arenaria (sand stalks) planted as barrier walls. The barrier walls are erected facing the wind, with Artemisia arenaria planted at a density of one plant every 50-70cm. In other words, within a row of barrier walls, the Artemisia arenaria plants are spaced 50-70cm apart, and each half is torn in half lengthwise and connected sequentially. This arrangement allows wind to pass between the barrier walls, reducing surface wind speed and minimizing wind erosion. After the barrier walls are erected, the sandy surface becomes flat and stable with a uniform water content, facilitating subsequent management. Once the planted Artemisia arenaria survives, it increases vegetation biomass recovery and also promotes the natural growth of wild grass seeds nearby.

[0011] In some embodiments, after tearing the Artemisia argyi in the middle, it forms a left half and a right half, with the left half connected to the right half of the Artemisia argyi on its left side, and the right half connected to the left half of the Artemisia argyi on its right side.

[0012] In some embodiments, the connection is made by tying the two halves of Artemisia capillaris together with a rope, or by tying the Artemisia capillaris together with its adjacent Artemisia capillaris.

[0013] In some embodiments, the barrier wall is arranged in 1-5 rows facing the wind, such as 1 row, 2 rows, 3 rows, 4 rows, or 5 rows. The row spacing is 3 meters to 4 meters, with 3 meters being the preferred row spacing.

[0014] Phase Two: Planting leguminous shrubs on the leeward side of the barrier wall

[0015] The work is carried out in the autumn of the year the barrier wall is set up or the following year. The wind erosion gaps are inspected and repaired, and Artemisia argyi is used to repair the wind erosion gaps. Leguminosae shrubs are planted on the leeward side of the barrier wall.

[0016] In some embodiments, the leguminous shrub is one or more of the following: Amorpha fruticosa, Ilex chinensis, Camel thorn, Amorpha spp., Caesalpinia sappan, or Caragana korshinskii.

[0017] In some embodiments, the leguminous shrubs are spaced 1 to 3 meters apart, and the rows are spaced 1 to 3 meters apart. Two to five rows of leguminous shrubs are planted on the leeward side of the barrier wall. The row spacing between the leguminous shrubs and the barrier wall is also 1 to 3 meters.

[0018] Phase 3: Plant trees or shrubs along the barrier wall.

[0019] In the second or third year after the barrier wall is installed, inspect and replant any wind erosion gaps, fill the gaps with the same shrubs as before, and then plant trees or shrubs at the barrier wall site.

[0020] In some embodiments, the trees planted in the third stage are one or more of the following: Scots pine, white elm, oleaster, and poplar.

[0021] In some embodiments, the shrubs planted in the third stage are one or more of the following: long-stalked almond, saxaul, sand willow, sea buckthorn, and sand jujube.

[0022] In the above method, the first stage of the barrier wall is used to stabilize sand and retain water and prevent wind erosion; the second stage of the leguminous shrubs is used to enhance the stability of sandy soil and retain moisture; the third stage of the trees or shrubs is used to plant the main tree species to form a forest; the three stages are used in combination and are carried out in a timely manner, taking a total of two to three years to complete, with a afforestation survival rate as high as 90%.

[0023] In the above method, two adjacent Artemisia argyi plants are connected using a connecting device. This device includes an anchoring pipe, which is a hollow tube containing a filling column. The anchoring pipe is inserted into the soil, and the filling column fills the inside of the anchoring pipe, preventing sand and other soil from entering when the anchoring pipe is inserted. Once the anchoring pipe is stably inserted into the soil, there is almost no sand movement; that is, once the anchoring pipe is stably inserted, sand is unlikely to enter. At this point, the filling column is removed, fertilizer is added to the anchoring pipe, and then another portion of the filling column is inserted. The upper end of the anchoring pipe has a connecting part, which can be two or more. The connecting part is always above ground level and not inserted into the soil. The connecting part is used to connect the two halves of two adjacent Artemisia argyi plants, that is, to connect the left half of one Artemisia argyi plant to the right half of an adjacent Artemisia argyi plant. The anchoring pipe is filled with fertilizer, which can reduce fertilizer evaporation and loss with sand and soil, thus helping to conserve water and soil. The fertilizer is gradually released and absorbed by the nearby Artemisia selengensis, which helps to improve the survival rate of Artemisia selengensis and reduce the formation rate of wind erosion gaps.

[0024] In some embodiments, the anchoring tube is a cylindrical hollow tube with a hollow tip at the bottom. The hollow tip is wedge-shaped, cone-shaped, or funnel-shaped. The inner diameter of the anchoring tube is 5cm to 10cm, the height of the cylindrical hollow tube is 10cm to 20cm, and the height of the hollow tip is 1cm to 3cm.

[0025] In some embodiments, the amount of fertilizer filled, measured from the bottom of the hollow tip, is 1 / 3 to 1 / 2 of the total height of the anchoring tube, with the remaining height used for installing the filler column.

[0026] In some embodiments, the connecting part includes a rope, a buckle, a bracket, and a closing part. The bracket is fixedly connected to the outer wall of the anchoring pipe. The rope includes a first end and a second end, and the first end and the second end are respectively connected to a buckle. Each buckle can be detachably connected to the bracket adjacent to it, so that the rope forms a closed loop. The closing part is sleeved on the outside of the closed loop rope for tightening the shape of the rope.

[0027] In some embodiments, the seam is made of an elastic material.

[0028] To improve the survival rate of Artemisia annua, the fertilizer formula used in this invention is as follows: 1000 parts organic fertilizer and 3-5 parts gibberellin GA3, which are mixed together before use.

[0029] Organic fertilizer contains nitrogen, phosphorus, and potassium, which provide essential nutrients for the growth of Artemisia arenaria.

[0030] The chemical formula of gibberellin GA3 is C 19 H 22Previous studies have shown that gibberellin can break seed dormancy, inhibit flower bud formation, and increase fruit set rate. Further research results of this invention show that gibberellin GA3 can promote the absorption rate of nitrogen and phosphorus by Artemisia annua.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention's "three-stage" model is specifically designed for the characteristics of wind and water in desert regions. The primary driving force behind sand movement is wind, which increases water vapor evaporation. Under stable conditions, the dry sand layer on the surface blocks water vapor, creating a stable, gradually changing aquifer beneath the sand dunes. Trees, shrubs, and grasses generally adapted to sandy areas can grow normally in this environment. In vegetation restoration, this invention uses barrier walls to prevent wind erosion, maximizing the stability of sand and water and reducing evaporation—this is the first step in desertification control. In the autumn of the year the barrier is installed or the following year, after the sand has stabilized, the second step involves planting shrubs to further solidify the sand. After these two steps, the aquifer is no longer affected by wind erosion. The third step involves planting the main tree species for the final afforestation. The survival rate of the afforestation is approximately 90%, and the forestation speed is significantly accelerated. Attached Figure Description

[0033] Figure 1 This is a schematic diagram illustrating the principle of setting up a barrier wall in the first stage of the present invention.

[0034] Figure 2 This is a schematic diagram of the connecting part device of the present invention.

[0035] Figure 3 This is a diagram showing the positional relationship of each plant in the three stages of the present invention. Detailed Implementation

[0036] To enable those skilled in the art to better understand and implement the technical solutions of the present invention, the present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0037] Unless otherwise specified, all reagents used in this invention are commercially available, and all methods used are conventional techniques in the art.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] The inventive concept of this invention is as follows: the first stage, a barrier wall, is used to stabilize sand and retain water, preventing wind erosion; the second stage, leguminous shrubs, are used to enhance the stability of the sandy soil and retain moisture; the third stage, trees or shrubs, are used to cultivate the main tree species to form a forest. By setting up a specially structured connecting device, fertilizer evaporation and loss with the sand are reduced, effectively conserving water and soil. The fertilizer is gradually released and absorbed by the nearby Artemisia selengensis, helping to improve the survival rate of Artemisia selengensis and reduce the formation rate of wind erosion breaches. To improve the survival rate of Artemisia selengensis, the fertilizer formula used in this invention is as follows: 1000 parts organic fertilizer and 3 to 5 parts gibberellin GA3, mixed together before use.

[0041] Overview of afforestation areas:

[0042] The Mu Us Desert is located north of the Great Wall in Yulin City, Shaanxi Province. It is constantly influenced by northwesterly winds, resulting in a large area of ​​fixed and semi-fixed sand dunes. The Mu Us Desert has an elevation of approximately 1100-1500 meters. The ridges exposed on the periphery of the desert and extending into its territory are mainly Cretaceous red and gray sandstone, with generally horizontal strata and mostly flat tops. The average annual temperature in the desert area is 6.0℃-8.5℃, with average January temperatures ranging from -9.5℃ to 12℃ and average July temperatures from 22℃ to 24℃. Annual precipitation ranges from 250 mm to 440 mm, concentrated between July and September, accounting for 60%-75% of the annual rainfall, especially in August. Annual precipitation exhibits significant variability, with rainy years being 2 to 4 times rainier than sparsely rainy years. Droughts and floods are common, with droughts being more frequent than floods. Summers often bring torrential rains and hailstorms, with maximum daily rainfall reaching 100-200 mm. The eastern part of the sandy area receives 400-440 mm of annual precipitation and belongs to the light chestnut calcareous dry steppe zone, where shifting sands and bara (semi-fixed and fixed dunes) are widely distributed. The northwestern part receives 250-300 mm of precipitation and belongs to the brown calcareous semi-desert zone.

[0043] The test area of ​​this invention is mainly located in the northwestern part of the Mu Us Desert.

[0044] It should be noted that, in the following embodiments and experimental examples, except for the explicitly described schemes, all other operations such as planting, weeding, irrigation, and fertilization were carried out according to conventional afforestation methods. Apart from the explicitly described technical differences, all other operations were the same, in order to explore the impact of different technical features on the afforestation effect.

[0045] The afforestation method of the present invention includes the following embodiments.

[0046] Example 1

[0047] A three-stage afforestation method for desertified areas includes:

[0048] The first stage is to shield and stabilize the sand: according to the wind direction, erect shielding walls facing the wind;

[0049] The method for setting up the barrier wall is as follows: plant Artemisia argyi at a spacing of 50cm, tear the Artemisia argyi in half from the middle, and connect the two halves in sequence.

[0050] Specifically, in a row of screen walls, the spacing between Artemisia arenaria plants is 50cm. The screen wall consists of one row. In each row, the Artemisia arenaria is torn in half to form a left half and a right half. The left half is connected to the right half of the Artemisia arenaria planted to its left, and the right half is tied to the left half of the Artemisia arenaria planted to its right with a rope.

[0051] The first phase of setting up barrier walls allows wind to pass between the barrier walls, reducing surface wind speed and minimizing wind erosion.

[0052] In the second stage, leguminous shrubs were planted on the leeward side of the barrier wall.

[0053] Specifically, the work is carried out in the autumn of the year the barrier wall is erected. Wind erosion gaps are inspected and repaired using Artemisia arenaria. The repaired barrier wall is then connected to the adjacent Artemisia arenaria. On the leeward side of the barrier wall, Amorpha fruticosa shrubs are planted. The shrubs are spaced 1 meter apart, with a row spacing of 1 meter. Two rows of shrubs are planted on the leeward side of the barrier wall. The row spacing between the shrubs and the barrier wall is also 1 meter.

[0054] The third stage involves planting trees along the barrier wall;

[0055] Specifically, this is carried out in the second year after the barrier wall is erected. The wind erosion gaps are inspected and repaired, and the gaps are filled with the same shrubs as before. Then, Scots pine trees are planted at the barrier wall locations. The Scots pines are planted between adjacent Artemisia selengensis trees, with a spacing of 3 meters between each pine. Figure 3 As shown.

[0056] In the above method, the first stage of the barrier wall is used to stabilize sand and retain water and prevent wind erosion; the second stage of the leguminous shrubs is used to enhance the stability of sandy soil and retain moisture; the third stage of the trees or shrubs is used to plant the main tree species to form a forest; when the three stages are used in combination, the survival rate of the main tree species in afforestation is 90%.

[0057] Example 2

[0058] A three-stage afforestation method for desertified areas includes:

[0059] The first stage is to shield and stabilize the sand: according to the wind direction, erect shielding walls facing the wind;

[0060] The method for setting up the barrier wall is as follows: plant Artemisia argyi at a spacing of 70cm, tear the Artemisia argyi in half from the middle, and connect the two halves in sequence.

[0061] Specifically, within a single row of screen walls, the spacing between Artemisia argyi plants is 70cm. There are three rows of screen walls, with a row spacing of 3 meters. The Artemisia argyi are arranged in a square pattern. Within each row, the Artemisia argyi is torn in half lengthwise, forming a left and a right half. The left half is connected to the right half of the Artemisia argyi to its left, and the right half is tied to the left half of the Artemisia argyi to its right with rope.

[0062] The first phase of setting up barrier walls allows wind to pass between the barrier walls, reducing surface wind speed and minimizing wind erosion.

[0063] In the second stage, leguminous shrubs were planted on the leeward side of the barrier wall.

[0064] Specifically, the work is carried out in the autumn of the year the barrier wall is erected. Wind erosion gaps are inspected and repaired using Artemisia arenaria. The repaired barrier wall is then connected to the adjacent Artemisia arenaria. On the leeward side of the barrier wall, Amorpha fruticosa shrubs are planted. The shrubs are spaced 1 meter apart and 2 meters apart in rows. Five rows of shrubs are planted on the leeward side of the barrier wall. The row spacing between the shrubs and the barrier wall is also 2 meters.

[0065] The third stage involves planting trees along the barrier wall;

[0066] Specifically, this is carried out in the second year after the barrier walls are erected. The wind erosion gaps are inspected and repaired, and the gaps are filled with the same shrubs as before. Then, Scots pines are planted at the locations of the barrier walls. Scots pines are planted at each row of the barrier walls, between adjacent Artemisia selengensis, with a spacing of 3 meters between each pine.

[0067] In the above method, the first stage of the barrier wall is used to stabilize sand and retain water and prevent wind erosion; the second stage of the leguminous shrubs is used to enhance the stability of sandy soil and retain moisture; the third stage of the trees or shrubs is used to plant the main tree species to form a forest; when the three stages are used in combination, the survival rate of the main tree species afforestation is 92%.

[0068] Example 3

[0069] A three-stage afforestation method for desertified areas includes:

[0070] The first stage is to shield and stabilize the sand: according to the wind direction, erect shielding walls facing the wind;

[0071] The method for setting up the barrier wall is as follows: plant Artemisia argyi at a spacing of 70cm, tear the Artemisia argyi in half from the middle, and connect the two halves in sequence.

[0072] Specifically, within a single row of screen walls, the spacing between Artemisia argyi plants is 70cm. There are three rows of screen walls, with a row spacing of 3 meters. The Artemisia argyi are arranged in a square pattern. Within each row, the Artemisia argyi is torn in half lengthwise, forming a left and a right half. The left half is connected to the right half of the Artemisia argyi to its left, and the right half is tied to the left half of the Artemisia argyi to its right with rope.

[0073] The first phase of setting up barrier walls allows wind to pass between the barrier walls, reducing surface wind speed and minimizing wind erosion.

[0074] In the second stage, leguminous shrubs were planted on the leeward side of the barrier wall.

[0075] Specifically, the work is carried out in the autumn of the year the barrier wall is erected. Wind erosion gaps are inspected and repaired using Artemisia arenaria. The repaired barrier wall is then connected to the adjacent Artemisia arenaria. On the leeward side of the barrier wall, Amorpha fruticosa shrubs are planted. The shrubs are spaced 1 meter apart and 2 meters apart in rows. Three rows of shrubs are planted on the leeward side of the barrier wall. The row spacing between the shrubs and the barrier wall is also 2 meters.

[0076] The third stage involves planting trees along the barrier wall;

[0077] Specifically, this is carried out in the second year after the barrier walls are erected. The wind erosion gaps are inspected and repaired, and the gaps are filled with the same shrubs as before. Then, Scots pines are planted at the locations of the barrier walls. Scots pines are planted at each row of the barrier walls, between adjacent Artemisia selengensis, with a spacing of 3 meters between each pine.

[0078] In the above method, the first stage of the barrier wall is used to stabilize sand and retain water and prevent wind erosion; the second stage of the leguminous shrubs is used to enhance the stability of sandy soil and retain moisture; the third stage of the trees or shrubs is used to plant the main tree species to form a forest; when the three stages are used in combination, the survival rate of the main tree species in afforestation is 91%.

[0079] Example 4

[0080] A three-stage afforestation method for desertified areas includes:

[0081] The first stage is to shield and stabilize the sand: according to the wind direction, erect shielding walls facing the wind;

[0082] The method for setting up the barrier wall is as follows: plant Artemisia argyi at a spacing of 70cm, tear the Artemisia argyi in half from the middle, and connect the two halves in sequence.

[0083] Specifically, within a single row of screen walls, the spacing between Artemisia argyi plants is 70cm. There are three rows of screen walls, with a row spacing of 3 meters. The Artemisia argyi are arranged in a square pattern. Within each row, the Artemisia argyi is torn in half lengthwise, forming a left and a right half. The left half is connected to the right half of the Artemisia argyi to its left, and the right half is tied to the left half of the Artemisia argyi to its right.

[0084] The first phase of setting up barrier walls allows wind to pass between the barrier walls, reducing surface wind speed and minimizing wind erosion.

[0085] Two adjacent Artemisia argyi plants are connected using a connecting device. The connecting device includes an anchoring pipe 1, which is a hollow tube. Inside the anchoring pipe 1 is a filling column 2. The anchoring pipe 1 is inserted into the soil, and the filling column 2 fills the inside of the anchoring pipe 1. When the anchoring pipe 1 is fully inserted into the soil, it prevents sand and other soil from entering. Once the anchoring pipe 1 is stably inserted into the soil, there is almost no sand movement; that is, once the anchoring pipe 1 is stably inserted into the soil, sand is unlikely to enter. At this point, the filling column 2 is removed, fertilizer is added to the anchoring pipe 1, and then a portion of the filling column 2 is inserted back into the anchoring pipe 1. The upper end of the anchoring pipe 1 has a connecting part 3, which can be two or more. The connecting parts 3 are always above ground level and not inserted into the soil. The connecting parts 3 are used to connect two adjacent Artemisia argyi plants. The anchor pipe 1 is filled with fertilizer, which can reduce fertilizer evaporation and loss with sand and soil, thus helping to conserve water and soil. The fertilizer is gradually released and absorbed by the nearby Artemisia selengensis, which helps to improve the survival rate of Artemisia selengensis and reduce the formation rate of wind erosion gaps.

[0086] The bottom of the cylindrical hollow tube is provided with a hollow tip. The inner diameter of the anchoring tube is 5cm, the height of the cylindrical hollow tube is 20cm, and the height of the hollow tip is 2cm.

[0087] The amount of fertilizer injected is half the height of anchor pipe 1.

[0088] The connecting part 3 includes a rope 31, a buckle 32, a bracket 33, and a closing part 34. The bracket 33 is fixedly connected to the wall of the anchor pipe 1). The rope 31 includes a first end and a second end. The first end and the second end are respectively connected to a buckle 32. Each buckle 32 can be detachably connected to the adjacent bracket 33, so that the rope 31 forms a closed loop. The closing part 34 is sleeved on the outside of the closed loop rope 31 to tighten the shape of the rope 31.

[0089] The constriction section 34 is an elastic cord.

[0090] The fertilizer formula is as follows: 1000 parts organic fertilizer and 3 parts gibberellin GA3, mixed together before use.

[0091] In the second stage, leguminous shrubs were planted on the leeward side of the barrier wall.

[0092] Specifically, the work is carried out in the autumn of the year the barrier wall is erected. Wind erosion gaps are inspected and repaired using Artemisia arenaria. The repaired barrier wall is then connected to the adjacent Artemisia arenaria. On the leeward side of the barrier wall, Amorpha fruticosa shrubs are planted. The shrubs are spaced 1 meter apart and 2 meters apart in rows. Three rows of shrubs are planted on the leeward side of the barrier wall. The row spacing between the shrubs and the barrier wall is also 2 meters.

[0093] The third stage involves planting trees along the barrier wall;

[0094] Specifically, this is carried out in the second year after the barrier walls are erected. The wind erosion gaps are inspected and repaired, and the gaps are filled with the same shrubs as before. Then, Scots pines are planted at the locations of the barrier walls. Scots pines are planted at each row of the barrier walls, between adjacent Artemisia selengensis, with a spacing of 3 meters between each pine.

[0095] In the above method, the first stage of the barrier wall is used to stabilize sand and retain water and prevent wind erosion; the second stage of the leguminous shrubs is used to enhance the stability of sandy soil and retain moisture; the third stage of the trees or shrubs is used to plant the main tree species to form a forest; when the three stages are used in combination, the survival rate of the main tree species in afforestation is 94%.

[0096] Example 5

[0097] A three-stage afforestation method for desertified areas includes:

[0098] The first stage is to shield and stabilize the sand: according to the wind direction, erect shielding walls facing the wind;

[0099] The method for setting up the barrier wall is as follows: plant Artemisia argyi at a spacing of 70cm, tear the Artemisia argyi in half from the middle, and connect the two halves in sequence.

[0100] Specifically, within a single row of screen walls, the spacing between Artemisia argyi plants is 70cm. There are three rows of screen walls, with a row spacing of 3 meters. The Artemisia argyi are arranged in a square pattern. Within each row, the Artemisia argyi is torn in half lengthwise, forming a left and a right half. The left half is connected to the right half of the Artemisia argyi to its left, and the right half is tied to the left half of the Artemisia argyi to its right.

[0101] The first phase of setting up barrier walls allows wind to pass between the barrier walls, reducing surface wind speed and minimizing wind erosion.

[0102] Two adjacent Artemisia argyi plants are connected using a connecting device. The connecting device includes an anchoring pipe 1, which is a hollow tube. Inside the anchoring pipe 1 is a filling column 2. The anchoring pipe 1 is inserted into the soil, and the filling column 2 fills the inside of the anchoring pipe 1. When the anchoring pipe 1 is fully inserted into the soil, it prevents sand and other soil from entering. Once the anchoring pipe 1 is stably inserted into the soil, there is almost no sand movement; that is, once the anchoring pipe 1 is stably inserted into the soil, sand is unlikely to enter. At this point, the filling column 2 is removed, fertilizer is added to the anchoring pipe 1, and then a portion of the filling column 2 is inserted back into the anchoring pipe 1. The upper end of the anchoring pipe 1 has a connecting part 3, which can be two or more. The connecting parts 3 are always above ground level and not inserted into the soil. The connecting parts 3 are used to connect two adjacent Artemisia argyi plants. The anchor pipe 1 is filled with fertilizer, which can reduce fertilizer evaporation and loss with sand and soil, thus helping to conserve water and soil. The fertilizer is gradually released and absorbed by the nearby Artemisia selengensis, which helps to improve the survival rate of Artemisia selengensis and reduce the formation rate of wind erosion gaps.

[0103] The bottom of the cylindrical hollow tube is provided with a hollow tip. The inner diameter of the anchoring tube is 5cm, the height of the cylindrical hollow tube is 20cm, and the height of the hollow tip is 2cm.

[0104] The amount of fertilizer injected is half the height of anchor pipe 1.

[0105] The connecting part 3 includes a rope 31, a buckle 32, a bracket 33, and a closing part 34. The bracket 33 is fixedly connected to the wall of the anchor pipe 1). The rope 31 includes a first end and a second end. The first end and the second end are respectively connected to a buckle 32. Each buckle 32 can be detachably connected to the adjacent bracket 33, so that the rope 31 forms a closed loop. The closing part 34 is sleeved on the outside of the closed loop rope 31 to tighten the shape of the rope 31.

[0106] The constriction section 34 is an elastic cord.

[0107] The fertilizer formula is as follows: 1000 parts organic fertilizer and 5 parts gibberellin GA3, mixed together before use.

[0108] In the second stage, leguminous shrubs were planted on the leeward side of the barrier wall.

[0109] Specifically, the work is carried out in the autumn of the year the barrier wall is erected. Wind erosion gaps are inspected and repaired using Artemisia arenaria. The repaired barrier wall is then connected to the adjacent Artemisia arenaria. On the leeward side of the barrier wall, Amorpha fruticosa shrubs are planted. The shrubs are spaced 1 meter apart and 2 meters apart in rows. Three rows of shrubs are planted on the leeward side of the barrier wall. The row spacing between the shrubs and the barrier wall is also 2 meters.

[0110] The third stage involves planting trees along the barrier wall;

[0111] Specifically, this is carried out in the second year after the barrier walls are erected. The wind erosion gaps are inspected and repaired, and the gaps are filled with the same shrubs as before. Then, Scots pines are planted at the locations of the barrier walls. Scots pines are planted at each row of the barrier walls, between adjacent Artemisia selengensis, with a spacing of 3 meters between each pine.

[0112] In the above method, the first stage of the barrier wall is used to stabilize sand and retain water and prevent wind erosion; the second stage of the leguminous shrubs is used to enhance the stability of sandy soil and retain moisture; the third stage of the trees or shrubs is used to plant the main tree species to form a forest; when the three stages are used in combination, the survival rate of the main tree species in afforestation is 95%.

[0113] Experiment 1: Effects of Fertilizer on the Growth of Artemisia arenaria

[0114] Experimental method: Pot experiment, one Artemisia annua seedling was planted in one pot. Five replicates were made, and the average value of the test results was taken.

[0115] Test soil: 1 kg sandy soil + 100 g perlite + 200 g garden soil. The pH of the test soil was 7.1. The total nitrogen content of the test soil was 1.1 g / 100 g, the total phosphorus content was 0.3 g / 100 g, and the total potassium content was 0.8 g / 100 g.

[0116] Experiment 1: Artemisia annua was planted in the experimental soil as a blank control.

[0117] Experiment 2: 2g / 100g of fertilizer was applied to the test soil and mixed before use. The fertilizer formula was as follows: 1000 parts of organic fertilizer (commercially available, high-activity organic fertilizer purchased from Hebei Danong Fertilizer Co., Ltd., with organic matter ≥60%, N, P, K ≥6%, potassium humate ≥15%, humic acid ≥13%, amino acids ≥10%, and trace elements ≥13%), and 3 parts of gibberellin GA3. Artemisia annua was planted.

[0118] Experiment 3: 2g / 100g of fertilizer was applied to the test soil and mixed before use. The fertilizer formula was as follows: 1000 parts organic fertilizer (commercially available, same as in Experiment 2) and 5 parts gibberellin GA3. Artemisia annua was planted.

[0119] Example 4: 2g of fertilizer per 100g was applied to the test soil and mixed before use. The fertilizer formula was as follows: 1000 parts organic fertilizer (commercially available, same as in Example 2) and 3 parts test soil. Artemisia annua was planted.

[0120] Experiment 5: 2g / 100g of fertilizer was applied to the test soil and mixed before use. The fertilizer formula was as follows: 1000 parts test soil, 3 parts gibberellin GA3. Artemisia annua was planted.

[0121] Seven days after planting, the nitrogen, phosphorus, and potassium contents of the Artemisia annua plants before and after planting were tested, and the absorption efficiency of nitrogen, phosphorus, and potassium by Artemisia annua was calculated. It should be noted that the nitrogen content of Artemisia annua plants includes leaf nitrogen content and branch nitrogen content; the phosphorus content includes leaf phosphorus content and branch phosphorus content; and the potassium content includes leaf potassium content and branch potassium content. The results in Table 1 show that the use of gibberellin GA3 and organic fertilizer can effectively promote the absorption of nitrogen, phosphorus, and potassium by Artemisia annua from its branches and leaves.

[0122] The results are shown in Table 1.

[0123] Table 1 Nitrogen uptake rate

[0124]

[0125]

[0126] Table 2 Phosphorus Absorption Rate

[0127]

[0128] Table 3 Potassium Absorption Rate

[0129]

[0130] It should be noted that the connection relationships of components not specifically mentioned in this invention are all assumed to be based on existing technology. Since they do not involve the inventive point and are commonly used in existing technology, the structural connection relationships are not described in detail.

[0131] It should be noted that when numerical ranges are involved in this invention, it should be understood that both endpoints of each numerical range and any value between the two endpoints can be selected. Since the steps and methods used are the same as in the embodiments, preferred embodiments are described here to avoid redundancy. Although preferred embodiments of the invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this invention.

[0132] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A three-stage afforestation method for desertified areas, characterized in that, include: The first stage is to shield and stabilize the sand: according to the wind direction, erect shielding walls facing the wind; The method for setting up the barrier wall is as follows: plant Artemisia argyi at a spacing of 50cm to 70cm, and tear Artemisia argyi in half from the middle, with the left and right halves connected in sequence. In the second stage, in the autumn of the year the barrier wall was erected or the following year, leguminous shrubs were planted on the leeward side of the barrier wall. In the third stage, in the second or third year after the barrier wall is set up, trees or shrubs are planted at the barrier wall. In the second stage, the leguminous shrubs are one or more of the following: Amorpha fruticosa, Ilex chinensis, Camelthorn, Amorpha spp., Caesalpinia sappan, and Caragana korshinskii. The trees planted in the third stage are one or more of the following: Scots pine, white elm, oleaster, and poplar. The shrubs planted in the third stage are one or more of the following: long-stalked almond, saxaul, sand willow, sea buckthorn, and sand jujube. The first stage of the barrier wall is used to stabilize sand and retain water, and prevent wind erosion; the second stage of the leguminous shrubs is used to enhance the stability of sandy soil and retain moisture; the third stage of the trees or shrubs is used to plant the main tree species to form a forest; the three stages are used in combination to improve the survival rate of afforestation. The Artemisia argyi is connected using a connecting device, which includes an anchor tube (1), which is a hollow tube. The anchor tube (1) is filled with a filling column (2) inside. The anchor tube (1) is used to insert into the soil. The filling column (2) fills the inside of the anchor tube (1). When the anchor tube (1) is inserted into the soil, the filling column (2) is pulled out, fertilizer is filled into the anchor tube (1), and then the filling column (2) is inserted into the anchor tube (1). The upper end of the anchor pipe (1) is provided with a connecting part (3), and the number of the connecting parts (3) is more than two. The connecting parts (3) are located above the ground and are not inserted into the soil. The connecting parts (3) are used to connect the two halves of two adjacent Artemisia argyi plants. The connecting part (3) includes a rope (31), a buckle (32), a bracket (33), and a closing part (34). The bracket (33) is fixedly connected to the outer wall of the anchor pipe (1). The rope (31) includes a first end and a second end. The first end and the second end are respectively connected to a buckle (32). Each buckle (32) can be detachably connected to the bracket (33) adjacent to it. The rope (31) forms a closed loop. The closing part (34) is sleeved on the outside of the closed loop rope (31) for tightening the rope (31). The fertilizer formula is as follows: 1000 parts organic fertilizer, 3 to 5 parts gibberellin GA3; The gibberellin GA3 is used to improve the absorption rate of nitrogen, phosphorus and potassium by Artemisia annua; The amount of fertilizer injected is 1 / 3 to 1 / 2 of the height of the anchor pipe (1).

2. The three-stage afforestation method for desertified areas according to claim 1, characterized in that, The anchor tube (1) is a cylindrical hollow tube with a hollow tip at the bottom. The inner diameter of the anchor tube (1) is 5cm to 10cm, the height of the cylindrical hollow tube is 10cm to 20cm, and the height of the hollow tip is 1cm to 3cm.

3. The three-stage afforestation method for desertified areas according to claim 1, characterized in that, Set up 1-5 rows of barrier walls.

4. The three-stage afforestation method for desertified areas according to claim 1, characterized in that, Leguminosae shrubs are planted in 2 to 5 rows on the leeward side of the barrier wall, with a row spacing of 3 to 4 meters.

Images